| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318625000 | Plural servomotors | 32 |
| 20090039821 | STEP MOTOR DRIVING APPARATUS - A step motor driving apparatus includes a micro control unit (MCU), a pulse generator, a first step motor driver, a second step motor driver, and a communication port. The first step motor driver is configured for driving a first step motor and connected to the MCU. The second step motor driver is configured for driving a second step motor and connected to the MCU. The MCU is connected to the second step motor driver via the pulse generator. The pulse generator is configured to supply pulse signals to the second step motor driver. The communication port is connected to the MCU. The MCU receives a corresponding command from an external control apparatus via the communication port. The MCU selectively controls the first step motor driver to drive the first step motor or controls the second step motor driver to drive the second step motor according to the command. | 02-12-2009 |
| 20090128080 | SYSTEM AND METHOD FOR CONTROLLING MULTIPLE SERVO MOTORS - The present invention discloses a method for controlling multiple servo motors, comprising: connecting a first plurality of servo motors in series; providing a corresponding switch in the series connection path for at least every servo motor other than the last one; sequentially setting an ID to each servo motor except the last one, and turning ON the corresponding switch; and setting an ID to the last servo motor. | 05-21-2009 |
| 20090289592 | METHOD OF ADJUSTING A PLURALITY OF SUCCESSIVE POSITION-CONTROLLED AXES IN AN ADJUSTING STROKE - A control axis is subordinated to a plurality of position-controlled successive axes. It is determined, while an adjusting stroke, an initial theoretical position value for each successive axis by means of the position value or the temporal derivation of the position value of the control axis, in detecting for each successive axis a real position value, in determining a train interval by means of the real position value and the initial value position, in determining a deviation value which is valid for all successive axes by means of the train interval thereof and in determining again a final theoretical position value by means of the deviation value in connection with the real position value and in adjusting the position value for each successive axis by means of said final theoretical position value. | 11-26-2009 |
| 20100007302 | METHOD AND DEVICE - A method for controlling the movement of axles whose drives are connected for exchanging energy, in particular by connecting intermediate circuits of the converters respectively comprised by the drives, prior to the start of the movement, a predictive determination of the sequence of movements being performed, in the process of which first the time-critical axle is determined, then the travel profile of the time-critical axle is defined, then a respective total energy consumption is assigned to the possible travel profiles of additional axles, from these, the profile is selected that has the smallest total energy requirement associated with it, and then the movement is carried out. | 01-14-2010 |
| 20100066297 | MACHINE WITH FLYWHEEL-LESS BUFFER DRIVE - A machine has a basic body and a machine element. The machine element can be moved relative to the basic body by an electric working drive which is connected to an electric supply system via a working converter. An electric buffer drive is connected to the electric supply system via a buffer converter. The working converter and the buffer converter are controlled by a control device in line with a predetermined travel movement of the machine element in a coordinated manner. The coordination is such that a total load on the supply system by both converters together during the total travel movement of the machine element remains below a maximum load prompted by the working converter alone. The buffer drive has a drive shaft which has no flywheel connected to it. | 03-18-2010 |
| 20100072936 | Simultaneous zero verification for motors in a printing press - A method for determining accuracy of an actual position of a plurality of independent motors in a printing press is provided. The method includes commanding each of the plurality of motors in the printing press via a controller to move a desired initial position, comparing an actual position of each motor to the desired initial position of each motor, determining if the actual position of each motor is within a predetermined tolerance of the desired initial position, and resetting any motor outside the predetermined tolerance to be within the predetermined tolerance. A printing press is also provided. The printing press includes a plurality of printing press components and a plurality of motors. Each motor drives at least one of the printing press components and each of the motors has a desired initial position. The printing press also includes a position detector for determining an actual position of the motor with respect to the desired initial position of the motor. | 03-25-2010 |
| 20100090639 | Control System of an Actuator for the Actuation of Submarine Devices - Electronic control system for a submarine actuator, said actuator comprising a container body, from which a drive shaft projects that is suitable for inserting in a seat of said submarine device. The system comprises an electronic control board for at least one electric motor arranged inside said container body suitable for moving said drive shaft. | 04-15-2010 |
| 20100109593 | MULTI-DEGREE-OF-FREEDOM STAGE CONTROL SYSTEM - There are included a plurality of actuators, an instruction generator for generating instructions of plural degrees of freedom, a position arithmetic unit for calculating positions of plural degrees of freedom from signals of a plurality of sensors, a control arithmetic unit for calculating operation amounts of plural degrees of freedom from the instructions of plural degrees of freedom and the positions of plural degrees of freedom, a thrust force conversion arithmetic unit for calculating thrust force instructions of the plurality of actuators from the operation amounts of the plural degrees of freedom, a current instruction unit for calculating current instructions which should be flowed to the plurality of actuators, and a sensor configuration input device for selecting a desired sensor configuration from among a plurality of sensor configurations. The positions of plural degrees of freedom are calculated by using a position arithmetic expression corresponding to a selected sensor configuration. | 05-06-2010 |
| 20100171458 | SERVO CONTROLLER - A servo controller which drives one movable member | 07-08-2010 |
| 20100181955 | MOTOR CONTROLLER FOR TANDEM CONTROL - In position tandem control in which one movable member is driven by two motors, an output of the integral element of the velocity control unit in the control system for one motor is copied to the integral element of the velocity control unit in the control system for the other motor. A preload is added to a torque command output from each of the velocity control units in the motor control systems for two motors so that torques in mutually opposite directions are generated to suppress backlash between gears. | 07-22-2010 |
| 20100327796 | Servomotor control system and servomotor unit - A servomotor control system includes: an integrated control unit for integrally controlling servomotors; and servomotor units coupled with the integrated control unit and the servomotors. Each servomotor unit includes: a motor driver; a rotation detector of the servomotor; an original point detector for detecting an original point of the servomotor; a communication element for obtaining control information including rotation position instruction information from the integrated control unit; a rotation position calculator for calculating a current rotation position of the servomotor based on a rotation detection signal; a motor drive instruction element for outputting driving instruction information to the motor driver according to the control information and the current rotation position; and a current rotation position correction element for resetting the current rotation position to a predetermined original point when the original point detector detects the original point. | 12-30-2010 |
| 20110089884 | MULTI-ACTUATOR MOTION CONTROL SYSTEM - A multi-actuator motion control system includes a control methodology that coordinates the motion of multiple actuators while limiting the force-fight between the actuators. Control logic is provided in a relative coordinate system that allows control of the mean actuator position. Force-fight between the actuators is decoupled from the actuator position by estimating load forces on the actuator using reduced-order observers. | 04-21-2011 |
| 20110127942 | Control System of Multi-Shaft Servo Motor - The present invention relates to a control system of multi-shaft servo motor, wherein, comprises a position loop module ( | 06-02-2011 |
| 20110169441 | SYNCHRONOUS CONTROL APPARATUS - A synchronous control apparatus to synchronously control a plurality of motors with respect to a control subject includes a command device and a plurality of motor control devices. The control subject includes the motors, a plurality of position detectors configured to detect a plurality of position information of the motors respectively, and at least one coupler connecting movable axes of the motors. The command device includes a first position controller which is configured to compute a work position based on the position information detected by the position detectors and which is configured to compute, based on a difference between a position command and the work position, a new position command. Each of the motor control devices includes a second position controller configured to compute commands to drive the plurality of motors based on a difference between the new position command and the position information. | 07-14-2011 |
| 20110199039 | Fractional boost system - A fractional boost system including a boost converter, responsive to the base level voltage of a power supply, for providing a boost level voltage to a load and a control system for sensing the current to the boost converter and limiting the boost function of the boost converter when the current to the boost converter exceeds a predetermined level, while applying the power supply base level voltage and supplying current exceeding the predetermined level to the load. | 08-18-2011 |
| 20110241594 | SERVO CONTROL METHOD AND SERVO CONTROL APPARATUS - A method according to an example of the present invention is a servo control method to be applied to a feed drive mechanism configured to drive an object to be driven by using a plurality of motors, in which velocity control of the object to be driven is carried out by using a signal obtained by mixing velocity feedback signals of the motors with each other, and a torque instruction obtained by the velocity control is used for drive of all the motors. By this example, there is provided a servo control system capable of preventing a phenomenon in which a transfer function changes depending on the position of the object to be driven, and the phase abruptly lags to make the operation unstable, thereby making it difficult to increase the gain, from occurring. | 10-06-2011 |
| 20120194122 | DRIVE FOR A MACHINE WITH PULSE DECOUPLED WORKING POINT ADJUSTMENT - A drive for providing high dynamics for a machine, such as a production machine, includes a short-stroke motor, and a pulse-decoupling device for decoupling pulses of the short-stroke motor from the machine using closed-loop control. The pulse-decoupling device has at least one component for use as a working-point adjustment device for adjusting a working point of the short-stroke motor. The pulse-decoupling device is thus able to assume the function of pulse decoupling and in addition, at least partially, the function of working point adjustment. | 08-02-2012 |
| 20120299524 | PARALLEL DRIVE SYSTEM - To provide a parallel drive system that can reduce vibrations of an arm member and can realize positioning at a high speed even when a slave servomotor does not have a position detector, at a low cost. To achieve this object, a parallel drive system of the invention includes: a master servomotor and a slave servomotor that include linearly-moving movable units that are arranged in parallel to each other, respectively; and an arm member that forms a bridge between the two movable units. The system includes: a position detector detecting position information on the movable unit of the master servomotor; an acceleration sensor detecting acceleration information on the movable unit of the slave servomotor; a master servo amplifier controlling the master servomotor based on the position information; and a slave servo amplifier controlling the slave servomotor based on the position information and the acceleration information. | 11-29-2012 |
| 20130002185 | SYNCHRONOUS CONTROL APPARATUS, SYNCHRONOUS CONTROL METHOD, SYNCHRONOUS CONTROL PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM RECORDING SYNCHRONOUS CONTROL PROGRAM - There is provided a synchronous control apparatus, a synchronous control method, and a computer-readable recording medium recording the synchronous control program, which enable an impact applied to a driven shaft to be alleviated, and synchronous control to be started at a synchronization start position. A specifier that specifies a synchronization start position where a main shaft and a driven shaft start synchronization. A cam curve creator that creates a cam curve. A detector that detects position information of the main shaft in each control period. A controller that calculates a velocity command value to the driven shaft in each control period and calculates the velocity command value to the driven shaft in each control period, and the driven shaft is controlled with the calculated velocity command value. | 01-03-2013 |
| 20130026964 | CONTROL DEVICE THAT DRIVES ONE DRIVEN OBJECT BY TWO MOTORS - A control device that drives one driven object by a first motor and a second motor. A first processor has a first correction amount calculation unit configured to calculate an amount of correction for a torque command to the first motor based on a speed value difference between a speed value of the first motor and a speed value of the second motor in order to suppress vibrations. A second processor has a second correction amount calculation unit configured to calculate an amount of correction for a torque command to the second motor based on a speed value difference between a speed value of the first motor and a speed value of the second motor in order to suppress vibrations. | 01-31-2013 |
| 20130134919 | MOTOR CONTROL APPARATUS FOR SYNCHRONOUSLY CONTROLLING MASTER AXIS AND SLAVE AXIS - A motor control apparatus for synchronously controlling a master axis motor for driving a master axis and a slave axis motor for driving a slave axis, includes: a master axis position detector which outputs position data of the master axis and a reference signal with a predetermined fixed period; a master axis receiving circuit which receives the position data and the reference signal output from the master axis position detector; a master axis computation circuit which computes a master axis error representing a difference between the position data received by the master axis receiving circuit and the position data acquired at the time of the reception of the reference signal; and a slave axis motor control unit which controls the operation of the slave axis motor by using the master axis error as a command for synchronizing the operation of the master axis motor. | 05-30-2013 |
| 20130249464 | Actuator Assembly with Preloaded Ball Screws - An actuator assembly includes a first motor having a first transmission mechanism, a second motor having a second transmission mechanism, and a drive shaft operatively coupled to the first transmission mechanism of the first motor and the second transmission mechanism of the second motor. The actuator assembly includes a torque application system disposed in operative communication with the first motor and the second motor, the torque application system configured to direct an application of a translation torque and a preload torque between the first motor and the first transmission mechanism and between the second motor and the second transmission mechanism. | 09-26-2013 |
| 20140062377 | ACTUATING APPARATUS - An actuating apparatus has an actuator including a link having a plurality of joints and a plurality of motors for actuating the joints, and a controller for controlling the actuator. The controller controls the motors with a control torque m_τ_cntrl calculated according to the equation: | 03-06-2014 |
| 20140097783 | CONVEYING SYSTEM - A conveying system includes: a linear induction motor including a stator provided with a plurality of primary coils arranged along a conveying path and a mover provided movably along the conveying path; one or more first inverters that are provided corresponding to at least one of the primary coils in one or more areas requiring positioning on the conveying path to perform vector control with a sensor; one or more second inverters that are provided corresponding to at least of the primary coils in one or more areas requiring no positioning on the conveying path to perform V/F control; and a controller that is configured to output a speed reference to the first second inverters to control electric supply to the primary coils and to output the speed reference based on a feedback position received from a detector to the first inverter, to perform position control. | 04-10-2014 |
| 20140152230 | MOTOR POWER INTERRUPTING DEVICE OF INJECTION MOLDING MACHINE - A controller of an injection molding machine stores used/unused information in relation to each of the maximum number of controllable servo amplifiers, outputs an interruption request signal requesting power interruption in a lump to apart of or all of these plurality of servo amplifiers, and receives a power interruption confirmation signal confirming that the motor power of the servo amplifiers is interrupted. Further, the controller determines, on the basis of the interruption request signal, the power interruption confirmation signal and the used/unused information, whether or not interruption driving the servo motor is normally operated. | 06-05-2014 |
| 20140292251 | SYNCHRONOUS CONTROL UNIT FOR SYNCHRONIZING TWO SHAFTS WITH EACH OTHER - In the first synchronous system of the synchronous control unit ( | 10-02-2014 |
| 20140306644 | Electric Motor Control Device - An electric motor control device for performing tandem control for driving one movable component includes, for each electric motor, a position controller, a speed controller, and a current controller. Further, each electric motor also has a preload controller for adding a preload torque to a torque command Tm calculated by the speed controller, and to a torque command Ts calculated by the speed controller. The preload controller calculates a minimum necessary preload torque for eliminating backlash in accordance with a position of the movable component. | 10-16-2014 |
| 20150102760 | POWER SUPPLYING METHOD FOR INJECTION MOLDING MACHINE HAVING TRANSFORMER - An injection molding machine has a first servo amplifier configured to operate with a first voltage, a second servo amplifier configured to operate with a second voltage, and a transformer which has a primary side terminal and a secondary side terminal and transforms voltages mutually in a predetermined voltage ratio. A main power supply is connected to a primary side terminal or a secondary side terminal of the transformer, depending on whether a voltage of the main power supply supplied to the injection molding machine is equal to the first voltage or the second voltage, respectively. The first or the second servo amplifier is connected to a terminal of the transformer on the side where the main power supply is not connected. | 04-16-2015 |
| 20150323909 | SERVO MOTOR DRIVE - A servo motor drive is connected with at least two servo motors and contains: a main control unit, a power unit, and at least one servo drive module. Each servo drive module includes a communication interface unit, an input/output unit, a microprocessing unit, a field-programmable gate array, a current control unit, and a switching unit. The communication interface unit is electrically connected between the main control unit and the microprocessing unit. The input/output unit is electrically connected between the main control unit and the field-programmable gate array. The field-programmable gate array converts data of the at least two servo motors into digital data. | 11-12-2015 |
| 20160056736 | POSITION CONTROL APPARATUS - A tandem control method is applied to a position control apparatus. The tandem control method controls one object to be controlled by individually driving a first driving shaft and a second driving shaft. A speed difference between the first driving shaft and the object to be controlled is amplified and added to a torque command value of the first driving shaft. A speed difference between the second driving shaft and the object to be controlled is amplified and added to a torque command value of the second driving shaft. | 02-25-2016 |
| 20160056749 | SERVOMOTOR CONTROL SYSTEM INCLUDING A BUFFER SERVOMOTOR WITH A PLURALITY OF WINDINGS - A servomotor control system of the present invention includes: a multiple number of first servomotors for driving axes in a machine tool or others; a multiple number of converters for converting AC voltage into DC voltage; a multiple number of first inverters for converting DC voltage into AC voltage; second servomotors for rotating inertial bodies; a multiple number of second inverters for converting DC voltage into AC voltage; and a servomotor control unit for controlling the multiple first servomotors and the second servomotors, and is constructed such that the number of the second servomotors is less than that of the multiple second inverters, and at least one of the second servomotors includes a multiple number of independent windings, and at least part of the multiple second inverters are connected to the multiple independent windings provided for one of the second servomotors. | 02-25-2016 |
| 20160062325 | MOTOR CONTROL SYSTEM COMPENSATING INTERFERENCE BETWEEN AXES - A motor control system which uses position command values output from control parts for motors and feedback information from axes which are driven by the command values for feedback control of the axes in an environment in which when one or more axes among axes which are driven by motors are driven, the other axes receive interference, which motor control system calculates acceleration of an axis which is driven by a motor by a first control part, sends the calculated acceleration to a second control part using a communication device, multiplies the acceleration which was input at the second control part with a compensation gain to calculate a position compensating value which compensates the position of an axis, adds the calculated position compensating value to the position command value of the axis, and uses the compensated position command value to control the position of the axis. | 03-03-2016 |
