| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318119000 | RECIPROCATING OR OSCILLATING MOTOR | 57 |
| 20090072769 | APPARATUS AND METHOD FOR CONTROLLING OR REGULATING AN OSCILLATING DEFLECTABLE MICROMECHANICAL ELEMENT - The invention relates to an apparatus and to a method for controlling or regulating the deflection of micromechanically manufactured deflectable elements which, driven electrostatically, are deflected in an oscillating manner. It is the object of the invention to provide a possibility with which a much larger deflection range can be utilized and in so doing the required voltage potential difference for the electrostatic drive of a deflection can be kept small and the occurrence of the pull-in effect can be avoided. In accordance with the invention, a deflectable element is present which is held at a frame element by at least one spring element and which can be deflected using an electrostatic drive. The deflection can be achieved by means of at least one counter-electrode and the deflectable element usable as an electrode. In addition, at least one detector is present which is suitable for the contactless detection of at least one deflection position and which is connected to an electronic evaluation and control unit to influence the electrical voltage potential difference between the deflectable element and the counter-electrode(s) in dependence of a specific deflection position. | 03-19-2009 |
| 20110187297 | SWITCHING DEVICES AND RELATED METHODS - A mechanical device capable of switching between two states is described. The device may include a micromechanical resonator with two distinct states in the hysteretic nonlinear regime. The devices can be used as a low-power, high-speed mechanical switch integrated on-chip with silicon circuitry. | 08-04-2011 |
| 20110291595 | METHOD OF CONTROLLING VIBRATION MOTOR - Provided is a method of controlling a vibration motor, in which there are provided: a unit that generates a drive signal for generating elliptic motion; a unit that switches the drive signal with a voltage from a power supply, and changes a pulse width of the drive signal; a unit that detects a current flowing in an electromechanical energy conversion element through the switching unit; a unit that detects a position and a velocity of an object to be driven; and a control unit that controls the respective units, and sets the velocity of the object to be driven. The control unit controls a frequency and the pulse width of the drive signal so as to exercise a maximum output characteristic with respect to a target velocity within a range in which the current detected by the current detection unit does not exceed a given limit value. | 12-01-2011 |
| 20140117888 | MECHANICAL COMPONENT, MECHANICAL SYSTEM, AND METHOD FOR OPERATING A MECHANICAL COMPONENT - A mechanical component has: a mount; an adjustable part selectively set at least into a first vibration mode having a first natural frequency and into a second vibration mode having a second natural frequency; a first sensor unit providing a first sensor signal; and a second sensor unit providing a second sensor signal. The first and second sensor units are interconnected in such a way that an overall signal is generated with the aid of at least the first and second sensor signals, the overall signal having an overall ratio of a first maximum absolute value which arises in the event of an excitation of the first vibration mode, and a second maximum absolute value which arises in the event of an excitation of the second vibration mode. | 05-01-2014 |
| 20150357958 | Control Method For Vibration Generator And Vibration Generator - A control method for a vibration generator is provided. The vibration generator includes a fixed part around which a coil is wound, a movable part having a magnet, a bridge part movably supporting the movable part, and a power supply unit which applies an alternating current of a predetermined frequency to the coil. The power supply unit starts at the time of startup by the alternating current with a starting frequency which differs from a resonance frequency of the movable part, and the power supply unit changes the frequency of the applied alternating current to the resonance frequency of the movable part when the amount of vibration at the starting frequency reaches a predetermined ratio with respect to a saturation vibration amount of the resonance frequency. | 12-10-2015 |
| 318120000 | Stopping after predetermined number of reciprocations or cycles (including single cycle) | 2 |
| 20140184109 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR AND METHOD - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. After the drive termination of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to the phase of the drive signal generated during the motor running. The driver unit quickens the stop of the linear vibration motor by supplying to the coil the drive current of opposite phase according to the drive signal of opposite phase. | 07-03-2014 |
| 20160056735 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR AND METHOD - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. After the drive termination of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to the phase of the drive signal generated during the motor running. The driver unit quickens the stop of the linear vibration motor by supplying to the coil the drive current of opposite phase according to the drive signal of opposite phase. | 02-25-2016 |
| 318126000 | Energizing winding circuit control | 50 |
| 20110304284 | Rebound-Effector - A Rebound-Effector is a mechanism which runs a weight forth and back, by high acceleration. As the weight accelerates a rebound force is built up. This force is proportional to the product of the weight and the acceleration, and is in opposite direction to the acceleration vector. The Rebound-Effector has four operational phases. The energy inserts into the system, during the first phase, accelerates the weight to the same direction as the movement, being converted into kinetic energy. This kinetic energy is taken back during the second phase, while slowing down the weight, and stored. During the third phase, the stored energy accelerates the weight to the same moving direction, being converted into kinetic energy. This kinetic energy is taken back during the fourth phase, while slowing down the weight, and stored. Neglecting the friction and the non-ideal behavior of the energy conversion, the Rebound-Effector needs an external energy source just for compensating for the real, effective, physical work it performs. | 12-15-2011 |
| 20130320887 | ACTIVE CONTROL TYPE OF VIBRATION ABSORBING DEVICE - The present invention provides a vibration absorbing device. A vibration absorbing device according to an exemplary embodiment of the present invention includes a first magnetic force generation member fixed to an external portion that is separated from a vibration source and a second magnetic force generation member provided in one side of the vibration source. When vibration is generated by the vibration source, the direction and magnitude of a magnetic force of one of the first magnetic force generation member and the second magnetic force generation can be controlled such that the second magnetic force generation member can move in a direction for attenuating the vibration of the vibration source. | 12-05-2013 |
| 20140062347 | ELECTRONIC FITNESS DEVICE - An electronic fitness device is provided, the electronic fitness device including an enclosure having a cover, a motor positioned within the enclosure, a circuit board, a variable resistor positioned on the circuit board, the variable resistor comprising a first trace, a second trace, and a semiconductive film disposed over the first trace and the second trace, and control circuitry coupled to at least the motor and the circuit board. The cover is positioned to press the semiconductive film against the first trace and the second trace in response to a pressure applied to the cover, and the control circuitry is configured to actuate the motor in response to a change in the resistance between the first trace and the second trace resulting from the pressure applied to the cover. Also provided are a method of monitoring abdominal muscle position, and control circuitry. | 03-06-2014 |
| 20140232300 | VIBRATION MEMBER DRIVING CIRCUIT - A vibration member driving circuit causes vibrations in a vibration member at least including an electro-mechanical energy conversion element and an elastic body by applying alternating voltage to the electro-mechanical energy conversion element fixed to the elastic body. The vibration member driving circuit includes an inductor and capacitor serially connected to the electro-mechanical energy conversion element. 0.73*fm| 08-21-2014 | |
| 318127000 | Automatic in response to predetermined position, movement or condition in or of the motor or driven device | 31 |
| 20090091275 | ADAPTIVE DRIVE SYSTEM USING CURRENT VALUES FOR A PERSONAL CARE APPLIANCE - An adaptive system for a personal care appliance, such as a power toothbrush, having a workpiece which is driven through an amplitude of motion by a drive mechanism which includes a stator member includes a circuit ( | 04-09-2009 |
| 20090206778 | Control Apparatus For Linear Compressor - The present invention discloses a control apparatus for a linear compressor which can vary a cooling force and prevent an inrush current. The control apparatus for the linear compressor includes a coil winding body laminated on the linear compressor, a first capacitor connected in series to the coil winding body, a capacitance varying unit being formed in a parallel structure to the first capacitor, and having a capacitor switch, and a control unit for inducing an output change of the linear compressor, by varying the whole capacitance of the control apparatus by controlling the capacitor switch. | 08-20-2009 |
| 20090243519 | Electromagnetic actuator driving method - An electromagnetic actuator includes a stator and a movable body. The stator includes a core provided with magnetic poles and a coil wound on at least one of the magnetic poles. The movable body includes a permanent magnet and supported in such a manner as to make reciprocating in a direction perpendicular to a direction in which the permanent magnet opposes the magnetic poles. The movable body is reciprocated upon applying an alternating voltage to the coil. An electromagnetic actuator driving method for driving the electromagnetic actuator includes performing feedback control of the alternating voltage in which the alternating voltage is applied to the coil during a first half of a control period and in which an induced electromotive force generated in the coil during a second half of the control period is used as a control signal. | 10-01-2009 |
| 20090243520 | Method for controlling operation of a linear vibration motor - A linear vibration motor includes a stator formed of an electromagnet with a winding, a vibrator provided with a permanent magnet and a control unit for controlling a driving current supplied to the winding of the electromagnet. The linear vibration motor is configured to reciprocate the vibrator relative to the stator. A method for controlling operation of the linear vibration motor includes: providing a non-energization period during which no driving current flows through the winding of the electromagnet, the non-energization period being equal to greater than a ¼ cycle; detecting an electromotive voltage induced in the winding as the vibrator makes vibrating movement within the non-energization period; detecting the displacement, velocity or acceleration of the vibrator based on the electromotive voltage thus detected; and controlling the driving current supplied to the winding based on the displacement, velocity or acceleration of the vibrator thus detected. | 10-01-2009 |
| 20100301783 | ARRANGEMENT HAVING AN OSCILLATING MOTOR AND A METHOD FOR CONTROLLING AN OSCILLATING MOTOR - The invention relates to an arrangement having an oscillating motor ( | 12-02-2010 |
| 20120032618 | METHOD AND DEVICE FOR ACTIVATING A CONTROL ELEMENT OF A DRIVE APPARATUS, SAID CONTROL ELEMENT HAVING A RESPONSE DELAY - In order to activate a control element ( | 02-09-2012 |
| 20130076276 | SPRING-LOADED DRIVE WITH ACTIVE FEEDBACK IN DC CIRCUIT - A motor control of a motor has a DC circuit with a back-up capacitor and a switching device that can connect a motor to the back-up capacitor. A spring device applies a restoring force to the rotor of the motor when deflected from an idle position. When the DC Circuit feeds energy into the back-up capacitor from a power supply network, a control device activates switching elements of the switching device to adjust an actual deflection of the rotor to a required deflection. When the rotor is deflected from the idle position and the back-up capacitor receives no energy from the power supply network, the control device, supplied with energy by the back-up capacitor, sets the required deflection to the idle position and activates the switching elements such that the motor, upon being restored by the spring device, feeds energy into the back-up capacitor via the switching elements. | 03-28-2013 |
| 20130307441 | System and Method for Control of Linear and Rotary Vibrators in an Electronic Device - A system and method for driving a vibrator in an electronic device, as well as electronic device employing such a system or method, are disclosed. In one example embodiment, the system for driving the vibrator includes an integrated circuit having one or more input terminals, one or more output terminals, a vibrator driver amplifier circuit, and one or more additional circuit components. The system further includes at least one processing portion for providing one or more input signals to the one or more of the input terminals. The system is configurable such that one or more control signals to be provided to the vibrator will include one or more first signals if the vibrator is a first vibrator device of a first type, and one or more second signals if the vibrator is a second vibrator device of a second type different from the first type. | 11-21-2013 |
| 318128000 | Noise, sound, vibration, movement or position of motor | 23 |
| 20090153081 | Method for Adjusting a Piston in a Linear Compressor - A method for operating a linear compressor including a linear drive with a stator and a rotor configured for displacement by a magnetic field of the stator against a spring force, and a compression chamber which is delimited by a displaceable piston coupled to the rotor during the operation of which an alternating current is applied to the stator in order to drive the rotor in an reciprocatingly, the method including the steps of applying, prior to operation, a direct current with a first polarity to the stator in order to displace the rotor from a rest position, measuring a first end position attained by the rotor under the action of the direct current, and controlling, during operation, the intensity of the alternating current with which the stator is excited in a manner wherein the rotor does not reach the first end position or reaches it at a reduced speed. | 06-18-2009 |
| 20100066275 | METHOD AND APPARATUS FOR CONTROLLING MIRROR MOTION IN LIGHT SCANNING ARRANGEMENTS - A method and apparatus of driving a motor in a light scanning arrangement. The method includes the following steps: (1) driving a drive coil with a drive signal to oscillate a scan mirror and a light beam reflected from the scan mirror; (2) generating a feedback signal having zero crossings during oscillation of the scan mirror by a feedback coil in proximity to the drive coil; (3) integrating the feedback signal to generate an integrated feedback signal; and (4) processing the integrated feedback signal to generate a periodic drive signal that has the same time period as the feedback signal. | 03-18-2010 |
| 20110181208 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil with a nonconducting period inserted between conducting periods. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to a coil. An induced voltage detector detects an induced voltage occurring in the coil during the nonconducting period. A zero-cross detecting unit detects the zero cross of the induced voltage detected by the induced voltage detector. The drive signal generator estimates the eigen frequency of the linear vibration motor based on a detected position of the zero cross, and the frequency of the drive signal is brought close to the estimated eigen frequency. | 07-28-2011 |
| 20110181209 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. After the drive termination of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to the phase of the drive signal generated during the motor running. The driver unit quickens the stop of the linear vibration motor by supplying to the coil the drive current of opposite phase according to the drive signal of opposite phase. | 07-28-2011 |
| 20110181210 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil with a nonconducting period inserted between conducting periods. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to a coil. The drive signal generating unit estimates the eigen frequency of a linear vibration motor based on a detected position of the zero cross occurring in the coil during the nonconduting period, and the frequency of the drive signal is brought close to the estimated eigen frequency. The zero-cross detecting unit sets a detection window for avoiding the detection of zero cross of voltages other than the induced voltage. The zero-cross detecting unit enables a zero cross detected within the detection window and disables a zero cross detected outside the detection window. | 07-28-2011 |
| 20110279067 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - In a drive control circuit of a linear vibration motor, a differential amplifier circuit includes an operational amplifier in which an P-channel type transistor is used as a transistor that receives an input voltage, and the differential amplifier circuit detects an induced voltage occurring in a coil. Before the H-bridge circuit is controlled to a high impedance state, a drive signal generating unit turns on a first transistor and a second transistor, and delivers a regenerative current through the coil, the first transistor, the second transistor and the power supply potential. | 11-17-2011 |
| 20110279068 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - In a drive control circuit of a linear vibration motor, a drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. An induced voltage detector detects an induced voltage occurring in the coil. After a running of the linear vibration motor has terminated, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. The induced voltage detector detects the induced voltage occurring in the coil during the high impedance period. | 11-17-2011 |
| 20110279069 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - In a drive control circuit of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running, after the running of the linear vibration motor has terminated; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. An induced voltage detector detects an induced voltage occurring in the coil. A comparator has a function as a hysteresis comparator in which the output level does not vary in a predetermined dead band, and the comparator outputs a high-level signal or a low-level signal during the high impedance period. When an in-phase signal is consecutively outputted from the comparator during the consecutive high-impedance periods, the drive signal generating unit determines that the linear vibration motor has come to a stop. | 11-17-2011 |
| 20120032619 | ACTIVE VIBRATION CONTROL APPARATUS - An active vibration control apparatus includes a linear actuator and a controller. The linear actuator includes a moving element, a stator and an elastic support. The stator has a plurality of coils surrounding the moving element. The elastic support supports the moving element to be reciprocally movable relative to the stator in an axial direction of the moving element due to elastic deformation of the elastic support. The controller is configured to apply an alternating current to the stator to generate vibration due to relative displacement of the moving element and the stator in the axial direction. The controller is configured to correct a center position of an amplitude of the vibration by additionally applying a predetermined direct current as a biased current to the stator when the linear actuator satisfies a predetermined vibration condition. | 02-09-2012 |
| 20120056565 | Method for Balancing the Movement of Mobile Masses in a Bi-Linear Electrodynamic Motor - Method for balancing the motion of the magnetized movable masses of a bilinear electrodynamic motor comprising two movable masses moving in opposite senses parallel to the axis (x-x) of the motor, characterized in that the said method comprises the steps of:
| 03-08-2012 |
| 20120068634 | METHOD FOR OPERATING AN ELECTRIC APPLIANCE AND ELECTRIC APPLIANCE - An electrical appliance with a resonant motor for driving a vibratory component is provided that has a control unit for driving the resonant motor with a predetermined driving frequency and for measuring the motion-induced voltage of the resonant motor and for determining whether the measured voltage value coincides with a predetermined target voltage value or whether the measured voltage value has crossed over the predetermined target value. The control unit measures the motion-induced voltage at a predetermined time of measurement (t | 03-22-2012 |
| 20120133308 | LINEAR VIBRATION MODULES AND LINEAR-RESONANT VIBRATION MODULES - The current application is directed to various types of linear vibrational modules, including linear-resonant vibration modules, that can be incorporated in a wide variety of appliances, devices, and systems to provide vibrational forces. The vibrational forces are produced by linear oscillation of a weight or member, in turn produced by rapidly alternating the polarity of one or more driving electromagnets. Feedback control is used to maintain the vibrational frequency of linear-resonant vibration module at or near the resonant frequency for the linear-resonant vibration module. Both linear vibration modules and linear-resonant vibration modules can be designed to produce vibrational amplitude/frequency combinations throughout a large region of amplitude/frequency space. | 05-31-2012 |
| 20130015788 | ADAPTIVE DRIVE SYSTEM USING CURRENT VALUES FOR A PERSONAL CARE APPLIANCE - An adaptive system for a personal care appliance, such as a power toothbrush, having a workpiece which is driven through an amplitude of motion by a drive mechanism which includes a stator member includes a circuit ( | 01-17-2013 |
| 20130106319 | LINEAR ACTUATOR DRIVING DEVICE | 05-02-2013 |
| 20130207575 | RESONANT ACTUATOR USING MAGNETIC ACTION FOR A POWER TOOTHBRUSH - A magnetic actuator system which includes a case ( | 08-15-2013 |
| 20130234628 | ELECTROMAGNETIC VIBRATION EXCITER SYSTEM WITH ADJUSTABLE ELECTRO-VISCOELASTIC SUSPENSION DEVICE - The electromagnetic vibration exciter system with an adjustable electro-viscoelastic suspension device comprises an electromagnetic vibration exciter, a power amplifier and an adjustable electro-viscoelastic suspension device, which acts as the suspension device of the electromagnetic vibration exciter. The adjustable electro-viscoelastic suspension device contains a displacement sensor detecting the displacement of the moving component, a first adjustable amplifier and a second adjustable amplifier, a differentiator, an adjustable phase shifter, an adder and a proportioner. The linearity of the stiffness and damping of the exciter system is excellent, which can be adjusted as need through the adjustment of gain of the adjustable amplifier, the proportioner, the adjustable phase shifter. This invention has adjustable and linear parameters and it is also easy to be realized. | 09-12-2013 |
| 20130285578 | METHOD FOR DRIVING LINEAR ACTUATOR - An amplitude control unit ( | 10-31-2013 |
| 20140132186 | AMPLITUDE CONTROL FOR VIBRATING RESONANT SENSORS - A system is provided for controlling the amplitude of a vibrating resonant sensor through a drive signal applied to the resonator. The system comprises a controller that provides the drive signal to a forcer coupled to the resonator to excite the resonator into vibration at its resonant frequency. The system further comprises a buffer having an input node that receives charge of a pickoff capacitor of the resonator that is a measure of the resonator vibration and a current reference waveform. The buffer provides an output that is a difference signal that represents an error of the resonator vibration that corresponds to a difference between the measured resonator vibration and the current reference waveform, wherein the controller adjusts the drive signal in order to null the difference signal. | 05-15-2014 |
| 20140132187 | METAL ELASTIC MEMBER, MINIATURE MACHINE, METHOD OF MANUFACTURING MINIATURE MACHINE, SWING CONTROL DEVICE AND SWING CONTROL METHOD - A metal elastic member to be used for beams | 05-15-2014 |
| 20140306625 | DRIVING CIRCUIT FOR VIBRATION MOTOR AND DRIVING METHOD FOR VIBRATION MOTOR - The present invention provides a driving circuit for a vibration motor and a driving method for the vibration motor. The driving circuit comprises: a detecting unit, coupled to the vibration motor, for detecting rotating position and rotating speed of the vibration motor and accordingly generating a detecting result; and a control unit, coupled to the detecting unit and the vibration motor, for controlling acceleration and deceleration of the vibration motor according to the detecting result. The driving method comprises: providing a detecting unit for detecting rotating position and rotating speed of the vibration motor and accordingly generating a detecting result; and providing a control unit for controlling acceleration and deceleration of the vibration motor according to the detecting result. | 10-16-2014 |
| 20140340003 | SYSTEM AND METHOD FOR CONTROLLING THE STROKE AND OPERATION AT RESONANCE FREQUENCY OF A RESONANT LINEAR MOTOR - Linear compressor comprising a resonant linear motor ( | 11-20-2014 |
| 20160107091 | Electromagnetic Swing - Various embodiments of the present invention are directed to a powered children's swing. In various embodiments, the swing includes a seat, swing frame, one or more swing arms, a first magnetic component, second magnetic component, swing motion sensor, and swing control circuit. The magnetic components are configured to generate a magnetic force that drives the seat along a swing path. The swing control circuit is configured to control the magnetic components based at least on input from the swing motion sensor and generate control signals causing the seat to swing with substantially constant amplitude as specified by a user. | 04-21-2016 |
| 20160164446 | METHOD AND APPARATUS FOR BACK ELECTROMOTIVE FORCE (EMF) POSITION SENSING IN A CRYOCOOLER OR OTHER SYSTEM HAVING ELECTROMAGNETIC ACTUATORS - A method includes driving a component in an electromagnetic actuator back and forth during one or more cycles of the actuator, where the actuator includes a voice coil. The method also includes identifying a back electromotive force (EMF) voltage of the voice coil during at least one of the one or more cycles. The method further includes determining whether a stroke of the component is substantially centered using the back EMF voltage of the voice coil. In addition, the method includes, based on the determination, adjusting one or more drive signals for the voice coil during one or more additional cycles of the actuator. Determining whether the stroke of the component is centered could include determining whether the back EMF voltage of the voice coil is substantially maximized or determining whether times between extremes in the back EMF voltage are substantially equal. | 06-09-2016 |
| 318129000 | By means for producing periodic electrical pulses in the energizing circuit | 15 |
| 20080284359 | OSCILLATION DEVICE, OPTICAL DEFLECTION APPARATUS, AND DRIVE-SIGNAL GENERATING METHOD - An oscillation device capable of generating a drive signal waveform with a sufficiently small number of harmonic components is provided. The oscillation device includes an oscillation system, a supporting unit configured to support the oscillation system, a drive unit configured to drive the oscillation system, and a drive control unit configured to control the drive unit by supplying a drive signal. The oscillation system includes a torsion spring and an oscillator. The drive control unit includes a drive-signal generating circuit configured to generate the drive signal using an address generator configured to generate an address to which a predetermined variable is added at a frequency higher than a frequency of the drive signal and using a trigonometric-function table indexed by an output of the address generator. The frequency of the drive signal is adjusted by adjusting the predetermined variable. | 11-20-2008 |
| 20110025235 | METHOD AND DEVICE FOR CONTROLLING THE POWER SUPPLY OF AN ELECTROMAGNETIC ACTUATOR - In an electromagnetic actuator, which comprises a stator, a translator movable along a guiding element, and an excitation coil for generating an electromagnetic force which moves the translator, the coil is supplied with an electric current obtained according to the sum of a first electric signal, the time pattern of which defines a desired motion of the translator, with a second electric signal, which is generated only at each of given level variations of the first electric signal by modulating an oscillating function with a decreasing, time limited function, so that the second signal has an amplitude envelope having a certain maximum width such that the electromagnetic force is subjected to a higher increase of the static friction force between the translator and the guiding element. | 02-03-2011 |
| 20110080122 | METHOD AND DEVICE FOR ADJUSTING THE FREQUENCY OF A DRIVE CURRENT OF AN ELECTRIC MOTOR - A small electric appliance is described which comprises an oscillation-capable mechanism ( | 04-07-2011 |
| 20110181211 | DRIVE CONTROL CIRCUIT FOR LINEAR VIBRATION MOTOR - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. The drive signal is such that nonconducting periods are set before and after a positive current conducting period and the nonconducting periods are set before and after a negative current conducting period. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and then supplies the drive current to the coil. The drive signal generating unit sets the width of a nonconducting period such that, after the drive start of the linear vibration motor, the width of a nonconducting period to be set before at least the first conducting period of the drive signal is shorter than the width of a nonconducting period to be set before each conducting period during steady operation of the linear vibration motor. | 07-28-2011 |
| 20110193503 | Magnetically Powered Reciprocating Engine And Electromagnet Control System - The instant invention provides a magnetically controlled reciprocating engine having a unique electromagnet control system. The engine is constructed and arranged to operate from a stored power source such as batteries to provide extended run times by controlling the power supplied to the electromagnets in a manner that controls heat generation within the electromagnetic coils, thereby increasing coil life. The control system is also capable of controlling engine speed and/or torque outputs to make the engine versatile for a wide variety of uses. The system is constructed and arranged to be utilized on new or pre-existing engines of various configurations and may be utilized in other industries or devices that benefit from the use of electromagnets. | 08-11-2011 |
| 20120146557 | VIBRATION GENERATING MODULE, ACTUATOR USING THE SAME, HANDHELD DEVICE, METHOD FOR GENERATING VIBRATION AND RECORDING MEDIUM THEREOF - The present invention relates to a vibration generating module and an actuator using the same, and more specifically, to an invention for generating vibration using an unstable structure, in which magnetic force is generated using permanent magnets and a solenoid for generating alternating electromagnetic force, and the vibration is generated by inertia or impact as the permanent magnets or the solenoid is moved by the generated magnetic force. To this end, disclosed is a vibration generating module comprising: a magnetic force generating means | 06-14-2012 |
| 20120262094 | Magnetically Powered Reciprocating Engine And Electromagnet Control System - The instant invention provides a magnetically controlled reciprocating engine having a unique electromagnet control system. The engine is constructed and arranged to operate from a stored power source such as batteries to provide extended run times by controlling the power supplied to the electromagnets in a manner that controls heat generation within the electromagnetic coils, thereby increasing coil life. The control system is also capable of controlling engine speed and/or torque outputs to make the engine versatile for a wide variety of uses. The system is constructed and arranged to be utilized on new or pre-existing engines of various configurations and may be utilized in other industries or devices that benefit from the use of electromagnets. | 10-18-2012 |
| 20130334990 | DRIVER CIRCUIT AND METHOD - A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. The drive signal is such that nonconducting periods are set before and after a positive current conducting period and the nonconducting periods are set before and after a negative current conducting period. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and then supplies the drive current to the coil. The drive signal generating unit sets the width of a nonconducting period such that, after the drive start of the linear vibration motor, the width of a nonconducting period to be set before at least the first conducting period of the drive signal is shorter than the width of a nonconducting period to be set before each conducting period during steady operation of the linear vibration motor. | 12-19-2013 |
| 20150349691 | Controller for Use with a Reciprocating Electric Submersible Pump - A system and method is provided for controlling a reciprocating electric submersible pump with an AC linear motor. The system includes a programmable logic controller for controlling an inverter to provide pulse-width modulated AC power to the linear motor. Under operating conditions, a constant voltage is applied to the linear motor whose operating frequency can be controlled by the pulse-width modulation. | 12-03-2015 |
| 318130000 | Electrical oscillation or condenser charging and/or discharging circuits | 6 |
| 20080211435 | VIBRATION GENERATOR - A vibration generator has an oscillator including a magnet and a holding member for holding the oscillator based on a magnetic force emitted from the oscillator. The holding member includes a magnet or a magnetic body. The oscillator vibrates relative to the holding member. A magnetic force between the oscillator and the holding member defines a natural period of vibration of the oscillator relative to the holding member. When a periodic current is supplied to an electromagnetic coil fixed to the holding member, the oscillator vibrates relative to the holding member so as to synchronize with the period of the periodic current. By synchronizing the period of the periodic current with a natural period, the oscillator resonates. | 09-04-2008 |
| 20090058327 | PUMPING DRIVER FOR LINEAR MOTOR WITH CONSTANT BATTERY POWER/CURRENT - A pumping driver for a linear motor, which includes a DC/DC converter that performs the function of constant power pumping or constant input current pumping of a battery to a linear motor. | 03-05-2009 |
| 20100109580 | SYSTEM FOR ADAPTING THE RESONANT OPERATION OF A PERSONAL CARE APPLIANCE DURING THE LIFETIME THEREOF - The adapting system for a resonant drive appliance includes a circuit for measuring the back EMF induced in the stator coil of the motor following turn-off of the appliance. The frequency of the back EMF signal is determined from the zero crossings of the EMF signal. The determined frequency is then compared with a running average of previous frequency determinations, and the drive frequency of the appliance is adjusted if the difference between the compared frequencies is greater than a threshold value, e.g. 1 Hz. | 05-06-2010 |
| 20120104979 | Phase change pulse engine - A phase change pulse engine includes a superconducting magnet and a control circuit including a power supply and a capacitor. A changing magnetic field creates a magnetic coupling for a mechanical drive. The capacitor is connected to the power supply and the magnet's coil through a switching and timing control circuit to initially charge the capacitor. With the coil isolated from the capacitor, electric current from the capacitor is discharged through the coil to create the magnetic coupling. After a predetermined period of time, an electrical connection is re-established between the capacitor and the coil to recharge the capacitor. This generates a pulse of electrical energy that is periodically applied to the coil with the capacitor isolated from the coil. The pulse of electrical energy includes make up energy due to capacitor losses. | 05-03-2012 |
| 20130264973 | METHOD AND APPARATUS TO DRIVE A LINEAR RESONANT ACTUATOR AT ITS RESONANT FREQUENCY - A method for driving a Linear Resonant Actuator (LRA) is provided. During a first off interval, the back-emf of the LRA is measured. During a first off interval, a timer is started when the back-emf reaches a predetermined threshold, and after a predetermined delay has lapsed following the back-emf reaching the predetermined threshold during the first off interval, the LRA is driven over a drive interval having a length and drive strength. A second off interval is entered following the drive interval, and during the second off interval, the back-emf of the LRA is measured. During the second off interval, the timer is stopped when the back-emf reaches the predetermined threshold. The value from the timer that corresponds to the duration between the back-emf reaching the predetermined threshold during the first off interval and the back-emf reaching the predetermined threshold during the second off interval determines the length. | 10-10-2013 |
| 20150381096 | PERSONAL HYGIENE DEVICE WITH RESONANT MOTOR - A personal hygiene device has a resonant motor and a motor control unit for applying a periodic voltage signal with a driving frequency at the resonant motor for driving the resonant motor into an oscillating motion with an oscillating frequency equal to the driving frequency. The motor control unit comprises a synthesizer circuit for digitally synthesizing the periodic voltage signal from voltage pulses of variable length provided with a pulse frequency higher than the driving frequency such that at least two voltage pulses are applied at least in one of two half cycles of each period of the periodic voltage signal . | 12-31-2015 |
