| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318671000 | With particular motor control system responsive to the "actuating signal" | 48 |
| 20100072940 | SERVO MOTOR DRIVE CONTROL DEVICE FOR CALCULATING CONSUMED ELECTRIC ENERGY AND REGENERATED ELECTRIC ENERGY - A mechanical system includes a plurality of amplifier groups each having a common power source unit connected to a higher-level power source and a plurality of power supply units for supplying power to servo motors from the common power source unit. A servo motor drive control device of the mechanical system includes a plurality of amplifier group electric power detection units each determining an electric energy of the corresponding one of the amplifier groups. Each of the amplifier group electric power detection units totals individual periodic electric energy dEak of the servo motors connected to the power supply unit associated with the corresponding amplifier group thereby to determine an amplifier group periodic electric energy dEbg representing a consumed electric energy or a regenerated electric energy in the corresponding amplifier group and integrates the determined amplifier group periodic electric energy dEbg over a predetermined time length thereby to determine an amplifier group consumed electric energy Ebng. The individual periodic electric energy dEak takes a positive value when electric power is consumed by the servo motors, and takes a negative value when electric power is regenerated by the servo motor. | 03-25-2010 |
| 20100264868 | METHODS AND APPARATUS TO COUPLE AN ELECTRO-PNEUMATIC CONTROLLER TO A POSITION TRANSMITTER IN A PROCESS CONTROL SYSTEM - Example methods and apparatus to couple an electro-pneumatic controller to a position transmitter in a process control system are disclosed. A disclosed example apparatus includes a position transmitter having a first connection and having a second connection coupled to a power source, an electro-pneumatic controller including at least a first connection coupled to the first connection of the position transmitter, and a resistor coupled between the first connection and a second connection of the electro-pneumatic controller. | 10-21-2010 |
| 20100295497 | MOTOR CONTROL DEVICE AND MOTOR CONTROL SYSTEM - A motor control device includes a position command filter. The position command filter is configured to filter a position command in accordance with a predetermined filter constant. A controller is configured to output a torque command to control a motor based on the filtered position command and based on a detected position of the motor such that the position of the motor follows the filtered position command. A power converter is configured to apply a voltage command based on the torque command to a motor winding in the motor. A shift amount calculator is configured to calculate a shift amount of the motor per sampling time based on the position command. A filter constant setting part is configured to set the filter constant of the position command filter based on the shift amount. | 11-25-2010 |
| 20110181228 | Method and Apparatus for Controlling of a Servo-Drive - In a method and apparatus for controlling of a servo-drive, in particular of a solid state actuator in which the servo-drive is controlled during each control process by means of a two-point regulator (R2P), the two-point regulator (R2P) has a power signal (I) as control signal for actuation of the servo-drive. An upper switch point (PO) of the two-point controller (R2P) is allocated to one maximum power value (ÎOn) and a lower switch point (PU) of the two-point controller (R2P) is allocated to one minimum power value (ÎUm). The upper switch point (PO) and the lower switch point (PU) are established during the controlling process so that they are separated in pairs by at least a minimum default spacing (Dmin). | 07-28-2011 |
| 20130026966 | MOTOR CONTROL APPARATUS, MOTOR CONTROL METHOD, MOTOR SYSTEM, AND COMPUTER-READABLE MEDIUM - A motor control apparatus that controls the rotational angle of a motor ( | 01-31-2013 |
| 20130300337 | MOTOR CONTROL DEVICE - A motor control device includes: an acceleration/deceleration processing unit that generates a servo command according to an acceleration/deceleration parameter; a servo control unit that controls a motor drive torque to drive a control target machine motor according to the servo command; a power supply unit that supplies electric power of a predetermined power supply capacity from a commercial power supply to the servo control unit; an electrical storage unit that supplies electric power supplementing the electric power; and an acceleration/deceleration parameter setting unit that computes maximum power that can be used for acceleration/deceleration based on a power storage amount in the electrical storage unit, the power supply capacity, and all energy required for acceleration, computes an acceleration/deceleration parameter that causes electric power at a time of acceleration/deceleration to be equal to or lower than the maximum power, and sets the acceleration/deceleration parameter. | 11-14-2013 |
| 20140070753 | SYSTEM AND METHOD FOR CONTROL AND ANALYSIS OF A PRIME MOVER IN AN ELECTRICAL MACHINE USING CALCULATED TORQUE - Apparatus for controlling and diagnosing a prime mover of a vehicle traction system includes an alternator having a rotor and coupled to a crankshaft of the prime mover, a source of electrical energy, a position sensor supplying a position signal representative of an angular position of the rotor, and a control computer. The computer supplies energy to the alternator to crank the prime mover at a controlled rate. In a diagnosis mode, the computer generates a condition signal indicative of a malfunction of the prime mover, from a compression signal derived from an acceleration signal which is derived from the position signal. In a barring-over mode, the computer also supplies energy to the alternator and monitors the position signal to place the crankshaft in a desired angular position in an operation separate from diagnosis mode. | 03-13-2014 |
| 20140210395 | RANGE SWITCHING DEVICE - A range switching device may switch a shift range despite resetting and restarting of a controller. When the controller is reset and restarted during a switching operation of the shift range and the shift range before or after being switched is a P range, the controller controls a motor to rotate the motor until a range switching mechanism abuts against a first limit position of a movable range of the range switching mechanism and learns a rotation position of the motor as a reference position of the motor. When the shift ranges before and after being switched are the ranges other that the P range, the controller controls the motor to rotate until the range switching mechanism abuts against a second limit position of the movable range and learns the rotation position of the motor as the reference position. | 07-31-2014 |
| 318675000 | One transmitter or controller element follows another | 1 |
| 20100001680 | MOTOR DRIVING CONTROL METHOD AND MOTOR DRIVING CONTROL APPARATUS - A motor driving control method in which when the steering angular velocity is lower than a predetermined reference angular velocity, an actual motor drive current is inferred from a back electromotive voltage and an applying voltage in a three-phase brushless motor, and a limitation on the peak level of each of three-phase alternating current command waves is mitigated by permitting the interval between a pair of intersection points of a peak area of each of the three-phase alternating current command waves with a peak point neighborhood of a triangle wave to become approximately the same length as a dead time. | 01-07-2010 |
| 318677000 | With particular servoamplifier | 2 |
| 318681000 | Solid-state servoamplifiers | 2 |
| 20130113411 | SERVOMOTOR DRIVE DEVICE THAT DRIVES SERVOMOTOR CONNECTED TO ROTATING SHAFT - A servomotor drive device has a first converter, a regenerative resistor circuit having a first switching element and a regenerative resistor, a first connection part configured to connect a second converter in parallel to the regenerative resistor circuit in an attachable and detachable manner, and a first control unit configured to control the on and off states of the first switching element. The second converter has a second switching unit and a second control unit configured to return regenerative energy to an AC power source side by bringing the second switching element into the on state when the second converter is connected to the first connection part. | 05-09-2013 |
| 20160174392 | DRIVE APPARATUS | 06-16-2016 |
| 318683000 | With particular phase discriminator | 1 |
| 20080231223 | Rotor Driving Control Device and Image Forming Apparatus - A device of a motor with a rotation control means that decreases the fluctuation of its rotation period. The control is carried out based on the amplitude and the phase generated by amplitude-and-phase generating devices, detecting passage time of detected portions ( | 09-25-2008 |
| 318685000 | "Step-by-step" motors in closed-loop servos | 27 |
| 20080265825 | High-Current High-Resolution Driving Circuit - The present invention discloses a high-current high-resolution driving circuit comprising a controller, a digital-to-analog converter and a voltage-to-current converter. The controller is provided for receiving a control signal for operating a load and outputting a digital signal corresponding to the control signal. The digital-to-analog converter is provided for generating an analog voltage signal corresponding to the digital signal. The voltage-to-current converter is provided for generating a current signal corresponding to the analog voltage signal and transmitting the current signal to the load in order to drive the load. | 10-30-2008 |
| 20080272730 | Control Device for Stepping Motor - A control device for a stepping motor is provided that can reduce torque generated by a motor and control the expansion of a speed deviation when the rotational speed of a rotor exceeds a speed command. The control device includes first judging means ( | 11-06-2008 |
| 20080290830 | Stepping motor driving device, sheet processing device, and image processing apparatus - A stepping motor driving device drives a stepping motor according to a drive pulse of a step signal. A phase matching unit matches, at a time when there is a possibility that a rotor and a phase signal are out of phase with each other, phases of the rotor and the phase signal by applying at least one drive pulse after energizing the stepping motor for a predetermined time and applying a phase signal having a predetermined duration for a final pulse. | 11-27-2008 |
| 20080297096 | Disk Playback Apparatus And Stepping-Motor Control Apparatus - When the magnitude of a traverse signal exceeds a predetermined level, the value of a microstep drive signal is changed by one microstep angle so that the rotation angle of the stepping motor changes in a rotation direction in which the magnitude of the traverse signal decreases. A determination is made as to whether or not the magnitude of the traverse signal becomes a predetermined level or less. When the magnitude of the traverse signal does not become the predetermined level or less, the magnitude of the microstep drive signal is returned to the pre-change value and the value of the microstep drive signal is incremented by an additional microstep angle so that the rotation angle of the stepping motor changes in a rotation direction in which the magnitude of the traverse signal decreases. | 12-04-2008 |
| 20090001920 | MICRO-STEP DRIVING METHOD OF STEPPING MOTOR AND ELECTRICALLY-DRIVEN DEVICE USING STEPPING MOTOR - In a micro-step drive and driving method of a stepping motor, the stepping motor generates a drive force for movement on a prescribed path of a moving unit provided in an electrically driven device, a standard point and a target point of an operation are set on the path, the stepping motor is rotated such that the moving unit passes through the standard point, a count value of a stable stop point of the stepping motor that is closest to a count value at the point of time when the moving unit passed through the standard point is specified, the specified count value is set as a start point for controlling a rotation angle of the stepping motor, and the stepping motor is rotated, and stopped at the count value of the selected stable stop point. | 01-01-2009 |
| 20090039823 | Stepper Motor Control Apparatus - A stepper motor apparatus controls a stepper motor by taking a maximum response speed and maximum response acceleration of the stepper motor into account. | 02-12-2009 |
| 20090051310 | Closed Loop Stepper Motor Control - System and method for controlling a stepper motor. A current position of the stepper motor may be received. A position error of the stepper motor may be determined using the current position of the stepper motor. A velocity profile may be maintained based on the position error, such that it tracks the position error. A position correction value may be determined based on the velocity profile, e.g., by integrating a portion of the velocity profile. A new position value may be generated to drive the stepper motor. An output position value to the stepper motor may be provided to drive the stepper motor. The output position value may incorporate the new position value and the position correction value and may be operable to reduce position error of the stepper motor. | 02-26-2009 |
| 20090174358 | METHOD AND APPARATUS FOR HIGH SPEED STEPPER MOTOR STALL DETECTION - A detector device and a method for detecting a stall condition in a stepper motor, wherein the accumulated value of the back EMF is compared to a stall threshold when the stepper motor has exceeded a pre-determined rotational velocity threshold, the accumulated value of the back EMF representing a condition of the stepper motor, specifically a failure of the accumulated back EMF value to exceed the stall threshold indicating a stall condition of the stepper motor. | 07-09-2009 |
| 20090184677 | System and method for using a stepper motor as a rotary sensor - A method and apparatus for driving a stepper motor and using the stepper motor as a rotary sensor when the stepper motor is not being driven. | 07-23-2009 |
| 20090309534 | AUTOMATICALLY DETERMINING OPTIMAL PULSE DURATION FOR A STEPPER MOTOR - A system for calculating control pulse duration for optimal stepper motor performance. Duration of control pulses to a stepper motor is increased until stepper motor function begins. The duration of control pulses continues to be increased. It is determined whether stepper motor failure is detected. In response to detecting a failure, the duration of control pulses at the time of the failure is recorded. The duration of control pulses is decreased until stepper motor function is restored. The duration of control pulses continues to be decreased. It is determined whether a second failure is detected. In response to detecting a second failure, the duration of control pulses at the time of the second failure is recorded. A control pulse duration is calculated that optimizes performance of the stepper motor using recorded control pulse duration data. The calculated control pulse duration is applied to the stepper motor. | 12-17-2009 |
| 20090315503 | Control device of stepping motor, image reading device, control method and control program of stepping motor - A method of reading an image by an image sensor comprising: a) reciprocating a carriage from a predetermined position in a predetermined direction by rotating a stepping motor to which a second current value smaller than a first current value is supplied; and b) detecting whether or not the carriage after reciprocating is disposed at the predetermined position, by the sensor, wherein, in the case where the sensor detects that the carriage after reciprocating is disposed at the predetermined position, when the image sensor reads an image, the first current value is supplied to the stepping motor, and in the case where the sensor detects that the carriage after reciprocating is not disposed at the predetermined position, when the image sensor reads an image, a current value obtained by adding a third current value to the first current value is supplied to the stepping motor. | 12-24-2009 |
| 20100079102 | Apparatus and Method for Minimizing Undesirable Stepper Motor Rotor Motions - An apparatus for reducing undesired motions during initialization of a stepper motor having a rotor and windings, the apparatus comprising a rotary encoder for sensing direction of rotor rotation; a microcontroller responsive to signals from the rotary encoder for generating bidirectional motor control waveforms having variable digital amplitude values; at least one motor driver for receiving the motor control waveforms and translating the waveforms to drive the motor windings; and wherein the translated waveforms urge the rotor in a first direction and then a second direction to locate a desired rotor position. A method of reducing undesired motions during initialization of a stepper motor having a rotary encoder coupled thereto comprises applying currents to the phase windings to form a magnetic field vector in a direction; sensing a direction of rotor rotation; changing at least one motor phase current to rotate the magnetic field vector in a direction opposite to the direction of first sensed rotor rotation by a first electrical angle; sensing a direction of rotor rotation; changing at least one motor phase current to rotate the magnetic field vector to a next position in a direction opposite to the second sensed rotor rotation by a second electrical angle; and ending initialization, whereby the rotor is aligned with the magnetic field vector in its next position. | 04-01-2010 |
| 20100188036 | DRIVER CIRCUIT - An amount of a motor drive current is controlled to an appropriate value. Two coils are provided, and a rotor is rotated by the coils by setting different phases for the supplied currents to the two coils. During a phase where one of the coils is in a high-impedance state, an induced voltage generated in the coil is detected. According to the state of the induced voltage, an output control circuit controls the amounts of the motor drive currents supplied to the two coils. | 07-29-2010 |
| 20110025251 | MOTOR DRIVING DEVICE - A motor-driving device comprising: a switching element to control a current passed through a first coil of a stepping motor including the first and a second coils electromagnetically coupled; a rectifier element to be energized in a ground-side-to-second-coil direction; a coil-current-detection unit to detect a current passed through the first coil; a regeneration-current-detection unit to detect a current passed through the rectifier element; a control unit to turn off the switching element when the current passed through the first coil reaches a predetermined-set current based on a detection result of the coil-current-detection unit; and a negative-current-detection unit to detect whether a negative current greater in absolute value than a predetermined-set value is passed through the rectifier element based on a detection result of the regeneration-current-detection unit, the control unit keeping the switching element off when the negative current is not passed, based on a detection result of the negative-current-detection unit. | 02-03-2011 |
| 20110133682 | METHOD AND DEVICE FOR DETECTING STEP LOSSES OF A STEP MOTOR - For activating a stepper motor, a pulse-width modulated current is supplied to a coil of the stepper motor and it is determined whether the current flowing through the stepper motor, based on a default value, lies within a current bandwidth defined by an upper switching threshold and a lower switching threshold. The current supply to the coil is switched on when the detected current has dropped to the lower threshold and is switched off when the detected current has risen to the upper threshold. In order to detect a step loss, the signal form of the current or its change, respectively, is analyzed and deviations from desired values or desired value ranges, respectively, which have been caused by step losses, are detected. The determination of the signal form of the current or its change, respectively, may occur indirectly by analyzing a corresponding control signal. | 06-09-2011 |
| 20110221380 | Method and apparatus for providing precise position control for a wide range of equipment applications using SR motors in stepping control mode - An apparatus is provided for utilizing a Switched Reluctance motor to position and hold a load in a desired position. In operation, one or more switch reluctance (SR) motors are capable of operating in a stepping control mode in a first device. Additionally, a second device is capable of providing precise position control for the first device, while the one or more SR motors are operating in the stepping control mode. | 09-15-2011 |
| 20110241596 | Head up display device for vehicle - A head up display device for a vehicle includes a display; an optical system having a reflecting mirror; a stepping motor; and a control system having a determining device, a micro-step control device, and a forcible control device. The determining device determines whether an adjustment command for micro-step control is given. The micro-step control device performs the micro-step control as long as the determining device determines that the command for the micro-step control is given. The forcible control device forcibly controls a drive signal such that an electrical angle changes to a stabilizing point. When determination made by the determining device switches from determination that the command is given to determination that the command is not given, the forcible control device forcibly controls the drive signal, provided that the electrical angle as of the time of the determination that the command is not given is shifted from the stabilizing point. | 10-06-2011 |
| 20120176075 | DRIVE CIRCUIT AND DRIVE METHOD OF A STEPPING MOTOR - A stepping motor drive circuit includes a control-purpose controller including a control-purpose position detecting unit; a rotation command information inputting unit arranged to receive command information on the rotating position of the stepping motor; a control-purpose deviation calculating unit arranged to calculate a positional deviation between the rotating position of the stepping motor detected by the control-purpose position detecting unit and the rotating position included in the command information; and an amplitude value setting unit. The amplitude value setting unit switches operations of stator coils of the stepping motor pursuant to the command information, rotate the stepping motor to the rotating position included in the command information, and increase or decrease an amplitude value of a drive current fed to the stator coils during stoppage of the stepping motor depending on the positional deviation calculated by the control-purpose deviation calculating unit. | 07-12-2012 |
| 20120306428 | STEPPING MOTOR CONTROL CIRCUIT AND ANALOG ELECTRONIC TIMEPIECE - A control unit is provided which drives a stepping motor in a first mode in which a driving pulse is selected between one kind of main driving pulse and a correction driving pulse with energy greater than the one kind of main driving pulse in accordance with a rotation state of the stepping motor and the stepping motor is driven or a second mode in which the driving pulse is selected among plural kinds of main driving pulses and a correction driving pulse with energy greater than the plural kinds of main driving pulses in accordance with the rotation state of the stepping motor and the stepping motor is driven. The control unit switches a mode between the first and second modes depending on whether the voltage of a secondary cell serving as a power supply exceeds a switch voltage and drives the stepping motor. | 12-06-2012 |
| 20120306429 | CONTROL DEVICE, ACTUATOR SYSTEM, AND CONTROL METHOD - The control device comprises a position command creation part creating a target rotation angle value of a stepping motor, a position controller calculating the rotation speed of the stepping motor based on the deviation between the target rotation angle value and detected value, a boost command processing part calculating the boosted voltage according to the calculated rotation speed, a booster circuit boosting the motor power supply voltage, and a PWM inverter creating pulse signals supplied to the stepping motor. | 12-06-2012 |
| 20140055075 | MOTOR HAVING PULSE MODE AND BRUSHLESS MODE, AND CONTROL METHOD AND APPARATUS OF THE MOTOR - A motor includes a rotor having a magnet, a stator having two coils, and a controller configured to control excitations of the two coils. The stator includes first and second yokes excited by the coils, and first and second rotor detectors configured to detect a magnetic flux. The first yoke is arranged for each electric angle of 360°, and the second yoke shifts from the first yoke by an electric angle of 90°. The first rotor position detector is arranged at the same position as the first yoke. The controller generates an excitation switching signal for each coil based on detection signals from the first and second rotor position detectors, and excites a corresponding coil, and obtains first and second delay angles. | 02-27-2014 |
| 20140055076 | OCCLUSION DETECTION USING PULSE-WIDTH MODULATION AND MEDICAL DEVICE INCORPORATING SAME - Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a modulation module coupled to the motor, and a control module coupled to the modulation module. The modulation module generates a modulated voltage that is applied to the motor and rotates the rotor to deliver fluid via a fluid path. The control module adjusts a duty cycle of the modulated voltage to achieve a commanded rotation of the rotor and detects an occlusion condition in the fluid path based on the duty cycle. | 02-27-2014 |
| 20150326157 | A MOTOR DRIVING APPARATUS - A motor driving apparatus includes a rotor, a first yoke including a first magnetic portion, a first coil configured to, if energized, excite the first magnetic portion, a second yoke including a second magnetic portion, a second coil configured to, if energized, excite the second magnetic portion, a detecting portion including a first detection element, a second detection element, a third detection element, and a fourth detection element, each detection element being configured to detect a rotation position of the rotor, and a controller configured to switch a pole excited by the first magnetic portion and the second magnetic portion by switching an energization direction of the first coil and the second coil based on an output of the detecting portion. | 11-12-2015 |
| 20150326158 | Controller for Driving a Stepper Motor - A controller is provided for driving a stepper motor with a magnetic rotor and at least one coil. The controller has a power stage for supplying the at least one coil with current, at least one analog Hall sensor for providing a signal as a function of the position of the magnetic rotor with respect to the Hall sensor, and a feedback line connecting the Hall sensor with the power stage to feed the signal of the Hall sensor back to the power stage. | 11-12-2015 |
| 20160072418 | METHOD FOR PRECISE POSITION DETERMINATION - In a method of determining a current position of an output element connected to an electric stepper motor, a current position of a rotor of the stepper motor is determined by a rotor position sensor. The determination of the current position of the rotor is refined as a function of information about a currently active phase of the stepper motor, and the current position of the output element is calculated in response to the refined determination of the current position of the rotor. | 03-10-2016 |
| 20160079896 | CONTROL DEVICE OF STEPPING MOTOR, ELECTRONIC APPARATUS, RECORDING APPARATUS, ROBOT, CONTROL METHOD OF STEPPING MOTOR, AND CONTROL PROGRAM OF STEPPING MOTOR - A control device includes a position generating section that generates a position signal including position information of a rotor, an electrical angle detection section that outputs a detection electrical angle signal including electrical angle information that is obtained by multiplying a coefficient by the position signal, and a driving section that outputs an excitation current to a coil based on an amplitude signal including amplitude information of the excitation current and the detection electrical angle signal. | 03-17-2016 |
| 20160094169 | STEPPING-MOTOR CONTROL DEVICE AND CONTROL METHOD - A control device is a control device ( | 03-31-2016 |
| 318686000 | Reciprocating or oscillating motors | 2 |
| 20100301796 | Reciprocating actuator with closed loop servocontrol - A reciprocating actuator includes at least one element moving reciprocally relative to a rack, a device for driving the moving element in a driving direction, an element for returning the moving element in an opposite direction, at least one sensor for detecting the position of the moving element, and a servocontrol adapted to deliver, for each displacement cycle of the moving element in the driving direction, at least one correction signal (S | 12-02-2010 |
| 20120206081 | PARTIAL ARC CURVILINEAR DIRECT DRIVE SERVOMOTOR - A partial arc servomotor assembly having a curvilinear U-channel with two parallel rare earth permanent magnet plates facing each other and a pivoted ironless three phase coil armature winding moves between the plates. An encoder read head is fixed to a mounting plate above the coil armature winding and a curvilinear encoder scale is curved to be co-axis with the curvilinear U-channel permanent magnet track formed by the permanent magnet plates. Driven by a set of miniaturized power electronics devices closely looped with a positioning feedback encoder, the angular position and velocity of the pivoted payload is programmable and precisely controlled. | 08-16-2012 |
| 318687000 | Linear movement motors | 7 |
| 20080265826 | Method of Setting the Origin of a Linear Motor - A movable member is moved in a preset direction in a linear motor. A characteristic-change position-detecting unit detects a position where the magnetic characteristic of the magnets has abruptly changed. The position detected is used as an origin-setting reference position. A reference position for the absolute position of the magnetic linear encoder is set based on the reference position. | 10-30-2008 |
| 20090315504 | LINEAR ACTUATOR MOTOR SELECTION METHOD AND DEVICES - A method of selectively utilizing a set of linear actuator motors for an application includes providing a plurality of linear actuator motors numbered from 1 to N including a box shaped housing with respective lengths between a first end-plate and a second end-plate and respective hollow shafts. Each hollow shaft includes an extended portion out of either the first end-plate or the second end-plate and configured to receive a nut including a tube part integrally connected with a flat-end part. The nut is configured to be able to mate in a common manner to any of the plurality of linear actuator motors. The method further includes testing any of the plurality of linear actuator motors including the nut for the application, wherein the nut is detached from one linear actuator motor to reattach with another linear actuator motor. | 12-24-2009 |
| 20110304294 | Method for Controlling Three Single-Phase Motors and Moving a Platform in a Direction of the Normal, as Well as a Platform Suitable for That Purpose - In a method for controlling three single-phase motors and moving a platform in a direction of the normal, the motors are controlled by one three-phase converter, so that a first motor is operated between a first phase and a second phase of the converter, and a series connection or parallel connection of a second and third motor is operated between a second phase and a third phase of the converter. A platform is adapted to perform this method. | 12-15-2011 |
| 20120249042 | METHOD FOR CONTROLLING AN ELECTRIC CYLINDER AND A CONTROL SYSTEM FOR THE ELECTRIC CYLINDER - The invention realizes a method for controlling an electric cylinder and a control system for the cylinder that can prevent a load for pressurizing from significantly exceeding a target load and can shorten the time for the pressurization. A servo controller | 10-04-2012 |
| 20130181652 | Control Circuit for an Electric Motor Having a Power-Supply Control Device - The control circuit of an electric motor, which has at least one phase supplied with high voltage and has a defined high-voltage zone, is provided with a control for the supply current of the phase with a setpoint-value current, and has devices for measuring the supply current which generate a first analog signal whose value corresponds to the measured current, an electronic control unit being disposed in a low-voltage zone, and having an analog-to-digital converter for converting the first analog signal or another analog signal acting as the first analog signal, into a corresponding digital signal which is supplied to the electronic control unit. The measuring devices are formed by a bleeder resistor, which is disposed in series with the phase, as well as by a differential amplifier whose two inputs, respectively, are connected to two contacts of the bleeder resistor. The analog-to-digital converter is located in the high-voltage zone a galvanic separating element is situated between the analog-to-digital converter and the electronic control unit. The control circuit has, inter alia, a voltage converter which, within the high-voltage zone, provides a floating low voltage which supplies the analog-to-digital converter. | 07-18-2013 |
| 20130193901 | METHOD OF CONTROLLING LINEAR MOTOR - In a linear motor used for a driving axis of a large-size machine tool having a very long driving stroke, pole position correction values at a plurality of stroke positions are stored in a memory. A pole position correction value corresponding to an actual stroke position of a slider is calculated based on the stored pole position correction value. A corrected electrical angle offset value derived based on the calculated pole position correction value is used to control the linear motor. | 08-01-2013 |
| 20140210396 | LINEAR MOTOR DEVICE AND CONTROL METHOD - A linear motor device includes a linear motor and a controller that applies pressure to a pressurizing target by moving a needle provided with the linear motor. The controller includes: a speed-change position-setting unit that calculates a deceleration start position, which is a position where a movement speed of the needle starts to be reduced from a first speed to a second speed when the pressurizing target start to be pressurized, based on a distance required to reduce the movement speed of the needle from the first speed to the second speed which is lower than the first speed and at which pressure applied to the pressurizing target when the needle comes into contact with the pressurizing target is equal to or lower than a predetermined pressure; and a position determination unit that drives the needle of the linear motor at the first speed and at the second speed. | 07-31-2014 |
