| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318567000 |
Program- or pattern-controlled systems
| 106 |
| 318638000 |
With particular "error-detecting" means
| 82 |
| 318561000 |
Adaptive or optimizing systems including "bang-bang" servos
| 66 |
| 318563000 |
With protective or reliability increasing features (e.g., "fail-safe" systems)
| 62 |
| 318600000 |
Digital or numerical systems
| 62 |
| 318611000 |
With stabilizing features (e.g., anti-hunting, damping)
| 55 |
| 318671000 |
With particular motor control system responsive to the "actuating signal"
| 48 |
| 318632000 |
With compensating features
| 42 |
| 318625000 |
Plural servomotors
| 32 |
| 318626000 |
Limit or end-stop control
| 23 |
| 318609000 |
"Reset" systems (P.I.)
| 15 |
| 318599000 |
Pulse-width modulated power input to motor (e.g., "duty cycle" systems)
| 15 |
| 318590000 |
Multiple mode systems
| 12 |
| 318630000 |
Antibacklash systems (e.g., with unidirectional approach to balance)
| 12 |
| 318631000 |
Antistatic friction features (e.g., "dither" voltage)
| 7 |
| 318629000 |
Unwanted harmonic or voltage component elimination quadrature rejection systems | 5 |
| 20080203958 | MOTOR CONTROLLER AND ELECTRIC POWER STEERING APPARATUS - A second computing section executing a compensation control is provided with a third computing section computing a d-axis correction amount, and a fourth computing section computing a q-axis correction amount. The respective computing sections compute a d-axis correction coefficient and a q-axis correction coefficient corresponding to an rotation angle by referring to a map. The respective computing sections compute the d-axis correction amount and the q-axis correction amount on the basis of an arithmetic expression constituted by a first term obtained by multiplying a correction coefficient relating to an object axis by a q-axis current command value and a second term obtained by multiplying a correction coefficient relating to an auxiliary axis by a d-axis current command value. The second computing section computes a d-axis current command value and a q-axis current command value which do not generate a torque ripple caused by a distortion of an induced voltage waveform, by adding the d-axis correction amount and the q-axis correction amount to the d-axis current command value and the q-axis current command value. | 08-28-2008 |
| 20090174357 | SERVO MOTOR CONTROLLER - A servo motor controller having: a frequency identification section that performs analysis based on a frequency response method and identifies the frequency of a disturbance exhibiting a specified phase lag; an input/output gain identification section that identifies the input/output gain at the frequency identified by the frequency identification section; and a magnification factor resetting section that resets an adjustment magnification factor by performing a specified operation on a ratio between the identified input/output gain and a specified target value of the input/output gain. | 07-09-2009 |
| 20100201301 | CONTROL TECHNIQUES FOR MOTOR DRIVEN SYSTEMS - Embodiments of the present invention provide a drive signal for a motor-driven mechanical system whose frequency distribution has zero (or near zero) energy at the expected resonant frequency of the mechanical system. The drive signal may be provided as a pair of steps sufficient to activate movement of the mechanical system and then park the mechanical system at a destination position. The steps are spaced in time so as to have substantially zero energy at an expected resonant frequency f | 08-12-2010 |
| 20100201302 | CONTROL TECHNIQUES FOR MOTOR DRIVEN SYSTEMS - A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. The drive signal may be provided in a series of steps according to a selected row of Pascal's triangle, wherein the number of steps equals the number of entries from the selected row of Pascal's triangle, each step has a step size corresponding to a respective entry of the selected row of Pascal's triangle, and the steps are spaced from each other according to a time constant determined by an expected resonant frequency of the mechanical system. Alternatively, the stepped drive signal may be provided as a series of uniform steps according to a selected row of Pascal's triangle, in which the steps are provided in a number of spaced intervals corresponding to the number of entries from the selected row of Pascal's triangle, each interval includes a number of steps corresponding to a respective entry from the selected row of Pascal's triangle and the intervals are spaced in time according to a time constant determined from the expected resonant frequency of the mechanical system. These techniques not only generate a drive signal with substantially no energy at the expected resonant frequency, they provide a zero-energy “notch” of sufficient width to tolerate systems in which the actual resonant frequency differs from the expected resonant frequencies. | 08-12-2010 |
| 20120256578 | CONTROL TECHNIQUES FOR MOTOR DRIVEN SYSTEMS - A drive signal for a motor-driven mechanical system has zero (or near zero) energy at an expected resonant frequency of the mechanical system. These techniques not only generate a drive signal with substantially no energy at the expected resonant frequency, they provide a zero-energy “notch” of sufficient width to tolerate systems in which the actual resonant frequency differs from the expected resonant frequencies. | 10-11-2012 |
| 318635000 |
With signal-, voltage-, or current-limiting | 5 |
| 20090140686 | METHOD FOR CONTROLLING AN ELECTRIC MOTOR, CONTROL UNIT AND ELECTRIC MOTOR - For ensuring high-precision control of a planar motor ( | 06-04-2009 |
| 20100264867 | CONTROL DEVICE FOR MACHINE TOOL - A control device for a machine tool including a feed axis driving motor; a first power consumption calculating portion calculating power consumption of the feed axis driving motor; a second power consumption calculating portion calculating power consumption of equipment adapted to be operated by constant power; and a motor control portion determining a target time constant correlated with at least one of acceleration time and deceleration time of the feed axis driving motor, based on a summation of the power consumption calculated by the first power consumption calculating portion and the power consumption calculated by the second power consumption calculating portion, and controlling the feed axis driving motor based on the target time constant. | 10-21-2010 |
| 20110241595 | SYSTEMS AND METHODS FOR DECELERATING A MOTOR IN A COMPUTER NUMERICAL CONTROLLED MACHINE TOOL - A method for decelerating a motor in a computer numerical controlled machine tool is provided. The method includes calculating a present rate of deceleration D | 10-06-2011 |
| 20140312825 | PULSE MOTOR DRIVING CIRCUIT AND METHOD OF DRIVING A PULSE MOTOR - A pulse motor driving circuit for driving a pulse motor includes a first switch having a terminal that is connected with a positive terminal of a power source; a second switch having a terminal that is connected with a negative terminal of the power source; and a capacitor having a terminal connected with a limit element and having another terminal connected with another terminal of the first switch and another terminal of the second switch, wherein the limit element is provided between the positive terminal and the capacitor and limits a current, wherein the first switch is turned on and the second switch is turned off in a current application start period while the current starts to be applied, wherein the first switch is turned off and the second switch is turned on in a period other than the current application start period. | 10-23-2014 |
| 20140354208 | MOTOR CONTROL APPARATUS - This disclosure discloses a motor control apparatus including a controller. The controller includes a position controller and a speed controller. The controller is configured to control the inverter on the basis of the torque command. The controller includes a torque limiter configured to start first torque limitation which limits a commanded torque based on the torque command to a first torque or less in a case where the voltage detector detects that the DC voltage falls below a predetermined voltage, and to cancel the first torque limitation in a case where the voltage detector detects that the DC voltage exceeds the predetermined voltage. The controller includes a speed limiter configured to limit a commanded speed based on the speed command to a first speed or less in a case where the torque limiter cancels the first torque limitation. | 12-04-2014 |
| 318606000 |
Frequency- or phase-modulated systems | 3 |
| 20080224645 | CONTROL SYSTEM FOR SYNCHRONOUS ELECTRIC MOTOR - A control system for a synchronous electric motor controls the synchronous motor so that the phase of a current determined based on a magnetic pole position of a moving element of the motor may shift to a phase where maximum torque may be obtained. A magnetic pole position correcting section determines a magnetic pole position correction to be added to a relative magnetic pole position. In connection with a polarity change determining section which determines whether or not a polarity of an acceleration difference changes, a basic correction adjusting section switches computation between an incremental operation of incrementing a basic correction and a decremental operation of decrementing the basic correction by a correction increment/decrement. When the correction increment/decrement becomes a predetermined lower limit value B or less, the basic correction adjusting section stops the computation. The basic correction at that point is determined as a finally-determined magnetic pole position correction. | 09-18-2008 |
| 20150091490 | ELECTROMECHANICAL SYSTEM FOR OPERATION WITHOUT INTERMITTENCY OF AN IRRIGATION EQUIPMENT - An electronic control by frequency inverter of the displacement system of an irrigation or fertirrigation set is made up of structured pipelines, in which the water distribution sprayers are mounted, and which are coupled to each other, and supported by movable towers which are moved by gear motors driving by means of cardans the wheel gear that in turn drive pneumatic wheels, moving the structure about a fixed point, or pivot point, which is the central tower. The driving of the gear motors of each tower is performed by an electric control unit via a frequency inverter, with analogic signal, preferably a potentiometer, or position encoder digital sensor or optical sensor of alignment with relation to the front and back tower. | 04-02-2015 |
| 20160170400 | SERVO CONTROL DEVICE HAVING AUTOMATIC FILTER ADJUSTMENT FUNCTION BASED ON EXPERIMENTAL MODAL ANALYSIS | 06-16-2016 |
| 318562000 |
Time-sharing or multiplexing systems | 3 |
| 20080303470 | SINGLE PROCESSOR DUAL MOTOR CONTROL - A motor control processor is provided for motor phase current sampling of multiple variable frequency controlled electric motors. The motor control processor comprises an analog-to-digital (A/D) converter and a controller. The A/D converter has multiple analog inputs and generates a digital output signal in response to the multiple analog inputs. The controller is coupled to the A/D converter and determines a maximum desired switching frequency for a first one of the multiple variable frequency controlled electric motors. The controller further selects a base period in response to the maximum desired switching frequency and defines a phase shift time delay as a fraction of the base period so that the controller may control the multiple analog inputs of the A/D converter to sample motor phase currents of each of the multiple variable frequency controlled electric motors at sample times determined by the controller in response to the base period and the phase shift time delay. | 12-11-2008 |
| 20090206787 | Drive Control System and Machine Control Device - A drive control system includes a drive control device, an auxiliary control device, and a physical-amount detecting device. The physical-amount detecting device detects a physical amount such as position information necessary for the machine control device to operate. The drive control device, the auxiliary control device, and the physical-amount detecting device are connected to each other with a data communication line. Physical amount detected by the physical-amount detecting device is directly transmitted synchronously in a constant cycle to one or both of the drive control device and an auxiliary control device through the data communication line. | 08-20-2009 |
| 20160043669 | MOTOR CONTROLLER - When a control device of a motor controller simultaneously rotates a first DC motor and a second DC motor by controlling a first circuit, a second circuit and a third circuit, the second circuit is shared. Further, the control device controls each of switch elements of the shared second circuit by using pulse-width modulation. Accordingly, the drive of the first DC motor and the second DC motor can be controlled with high accuracy by the change of a duty ratio of each of the switch elements of the shared second circuit. | 02-11-2016 |
| 318580000 |
Vehicular guidance systems with single axis control | 2 |
| 20080231222 | WHEELED MOVING ROBOT - A wheeled moving robot including a main body; wheels provided at least at opposite sides of the main body and configured to move the main body; an actuator configured to generate torque which rotates the wheels; a detector configured to detect whether the main body moves when the wheels rotates by the actuator; and a compensation unit configured to perform an auxiliary movement which pushes an auxiliary wheel in front or rear of the main body toward a floor based as a detection result of the detector. | 09-25-2008 |
| 20140312824 | Servomotor Control Systems and Methods - Systems and methods for controlling servomotors are described herein. Servomotor controllers and related control circuitry are configured to generate control signals for controlling the servomotor. The control signals include directional control signals to control the rotational direction and position of the servomotor, and power control signals control the rotational speed and/or torque of the servomotor. | 10-23-2014 |
| 318628000 |
"Feelback" systems | 2 |
| 20140346997 | SERVO DOOR-CLOSER - A power-assisted door closer includes an output shaft, a driving mechanism operatively connected to the output shaft, a mechanical energy accumulator for storing closing energy for the door leaf and acting upon the driving mechanism, a motor/generator unit operatively connected to the output shaft and an electrical energy accumulator for storing an assisting energy for the door leaf and being electrically connected to the motor/generator unit. | 11-27-2014 |
| 20150137729 | ROTARY ACTUATOR - A rotary actuator, in particular for a motor vehicle, has an actuating element which can rotate about an axis, and a position sensor which detects the position of the actuating element in circumferential direction. The rotary actuator is disposed such that the rotational movement of the actuating element is continued a certain distance in the released state after manual actuation and is slowly decelerated. | 05-21-2015 |
| 318636000 |
"Sampling" systems including miscellaneous "sampled data" control systems | 2 |
| 20100141198 | CLOSED-LOOP CONTROL METHOD AND CLOSED-LOOP CONTROL DEVICE WITH MULTI-CHANNEL FEEDBACK - A method of closed-loop controlling determines a first feedback variable by sampling a control variable and a second feedback variable by averaging the control variable, compares the first and second feedback variables with a command variable, and sets the control variable on the basis of the comparing result so that the control variable follows a command variable. | 06-10-2010 |
| 20130257341 | MOTOR CONTROLLER AND MOTOR CONTROL METHOD - A motor controller receiving as input an encoder signal changing in response to a driving position of a motor, outputting a motor driving command in response to the encoder signal to control at least one of the driving position or a driving velocity of the motor, includes an interrupt processing section to execute interrupt operations every prescribed interrupt cycle, a low-frequency processing section to selectively execute a subset of the interrupt operations every prescribed number of the interrupt cycles, and a high-frequency processing section to execute another subset of the interrupt operations every prescribed interrupt cycle, wherein the high-frequency processing section executes at least an operation to detect the driving position indicated by the encoder signal, wherein the low-frequency processing section executes at least an operation to generate the motor driving command. | 10-03-2013 |
| Entries |
| Document | Title | Date |
|---|
| 20090015187 | METHOD OF OPTIMIZING SERVO CONTROLLER POWER IN TWO-DIMENSIONAL FLEXUTRE MEMS STORAGE DEVICES - A method of optimizing a servo controller power required in the operation of two-dimensional flexure (Microelectronic Memory Storage) MEMS devices. Furthermore, provided is an arrangement for optimizing servo controller power in a two-dimensional flexure MEMS storage device through a utilization of the inventive method. | 01-15-2009 |
| 20100102769 | DRIVING APPARATUS - A driving apparatus ( | 04-29-2010 |
| 20130175968 | MULTISTAGE CONTROL METHOD OF FLOW CONTROL VALVE USING DC MOTOR - A multistage control method of a flow rate control valve which is opened or closed when a DC motor rotates. The method includes dividing angular speed limit areas of the DC motor depending on stages based on limit values so that angular speed values of the DC motor are to be scheduled depending on the stages and controlling the DC motor to rotate at a determined angular speed value depending on a corresponding angular speed instruction to the DC motor within one angular speed limit area. When the angular speed value of the DC motor is outside a limit value of the corresponding angular speed limit area, the DC motor rotates at a determined angular speed value until reaching outside a limit value of the corresponding limit area depending on a corresponding angular speed instruction to the DC motor within an angular speed limit area of the next stage. | 07-11-2013 |
| 20130257337 | Electric Power Steering Apparatus - An electric motor and a control unit are juxtaposed in a speed reduction gear box. A terminal block is provided at an outer circumference of a flange proximate to a control unit of the electric motor. Terminal block surfaces of the terminal block are provided so that a plane direction faces a direction vertical to a shaft line of the electric motor. A motor side connecting terminal is held on the terminal block surface. The unit side connecting terminals provided at a position proximate to the electric motor of the control unit are arranged so as to overlap with the motor side connecting terminal on the terminal block surface to couple by a coupling portion (fixing screw). | 10-03-2013 |
| 20140084838 | NUMERICAL CONTROLLER HAVING FUNCTION FOR SWITCHING BETWEEN PRESSURE CONTROL AND POSITION CONTROL - When a numerical controller is notified of switching to pressure control during instructing of position-controlled synchronization, the numerical controller places the synchronization instruction in pause and switches to a pressure-controlled instruction. Then, when it is desired to return from pressure control to position control, a transition from pressure control to position control is effected by resuming the position-controlled synchronization instruction that has been placed in pause hitherto and outputting movement instructions up to the actual position all at once. With this, the actual speed matches the position-controlled speed controlled by the servo control section, thereby reducing a shock at the time of switching from pressure control to position control. | 03-27-2014 |
| 20140361723 | DRIVE CONTROL DEVICE - A drive control device having: a storage circuit configured to store a reference rotational speed table; a drive signal generation circuit configured to output a drive signal to the direct current motor; and a control circuit. When an absolute value of a difference between a second rotational speed corresponding to a first rotational direction and a third rotational speed corresponding to a second rotational direction is equal to or larger than a predetermined threshold, the control circuit creates separate rotational speed tables for the first rotational direction and the second rotational direction in which each rotational speed table indicates a relation between a rotational speed and an electric power amount per unit time, and determines an amount of electric power that is supplied to the direct current motor which corresponds to a designated rotational speed according to the rotational speed table selected in accordance with a designated rotational rotation. | 12-11-2014 |
| 20150376930 | WINDOW LIFTER FOR A VEHICLE AND METHOD FOR OPERATING SUCH A WINDOW LIFTER - For the purpose of realizing an operationally reliable window lifter (opener) for a vehicle, there is provision to ascertain from an operating variable of a servomotor in each case a measure of a regulated position of the window pane in the course of a plurality of operating cycles of the window lifter in which a window pane of the vehicle is opened and closed again, in each case entirely or partly. In each operating cycle, or at least in selected operating cycles, the measure is normalized to a reference value if at the end of the respective operating cycle the window pane is driven by the servomotor for at least a predetermined blocked time beyond a blocked position. The blocked time is shortened if the normalization was not carried out for a predetermined number of consecutive operating cycles. | 12-31-2015 |
| 20160170289 | SYSTEMS AND METHODS FOR MOUNTING PHOTOGRAPHIC EQUIPMENT | 06-16-2016 |
