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7609023 |
Control apparatus for electric vehicles
In electric vehicle control, system voltage stabilization control is executed to reduce the difference between a target value and detected value of a system voltage generated by a voltage boosting...
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7560888 |
Electromechanical actuator including redundant, dissimilar position feedback
A relatively small, lightweight actuator includes a plurality of motors, an actuation element, a translation member, and a plurality of position sensors. The motors each supply a drive force to the...
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7279862 |
Fault handling of inverter driven PM motor drives
An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a...
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7147299 |
Control unit and method for controlling motor for use in printer, and storage medium storing control program
There is provided a control unit capable of rapid and precise stoppage of an object to be driven by a motor for use in a printer. The control unit has a speed control part to control the object by...
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7106020 |
Method of operating a brushless DC motor
Methods and devices for brushless DC motor operation. An example method may include using previously sensed Hall effect sensor transitions to predict a future Hall effect transition, and dividing a...
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7081730 |
Motor controller system for large dynamic range of motor operation
A motor controller system uses a rotary sensor with a plurality of signal conditioning units, coupled to the rotary sensor. Each of these units, which is associated with a particular range of motor...
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6955145 |
Methods and apparatus for receiving excessive inputs in a VCT system
A method that provides increased flexibility to measure dynamic range of a rotating system is provided. The method includes the steps of: providing a first rotating member; providing a second...
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6877837 |
Control unit and method for controlling motor for use in printer, and storage medium storing control program
There is provided a control unit capable of rapid and precise stoppage of an object to be driven by a motor for use in a printer. The control unit has a speed control part to control the object by...
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6518721 |
Oscillation isolator
An oscillation isolator for supporting an oscillation isolation platform on a pedestal includes an active oscillation isolator having a displacement generating type actuator to reduce oscillation...
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6424105 |
Real-time control of feedback signals to a motor for optimum performance
An electric motor that may be used in a remote location, such as in a wellbore for pumping production fluids. The electric motor is designed to permit real-time adjustment of the position feedback...
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6137255 |
Apparatus and method of controlling a linear motor door operator
A control system (10) for a door operator (12) for moving a door includes a position sensor (54) to be coupled to the door (28) for sensing the position of the door and generating a position...
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6107770 |
Control system for counter-oscillating masses
A control system stabilizes the flexible body bending modes of a space, airborne, or ground-based system, while providing angular position control of an oscillating mass connected to a...
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6037736 |
Apparatus for determination of control constant
A control constant identification system which comprises a command generation section for generating a speed command Vref, a speed control section for determining a torque command Tref by the speed...
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5994868 |
Motor control device
A driving circuit for generating a motor driving voltage has a positive feedback loop for feeding back the motor driving voltage through a filter. The filter is arranged so as to have a transfer...
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5932986 |
Precise control of the rotational velocity of brushless alternating current electric servo motors
A brushless AC servo motor control and modified motor to minimize the rotational acceleration and deceleration of a semiconductor wafer during processing steps where fluid is applied in a thin...
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5920175 |
Instantaneous position indicating apparatus for a sensorless switched reluctance machine system
A sensorless control for operating an inverter coupled to a switched reluctance machine includes an instantaneous position generation circuit that develops a signal for controlling commutation of...
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5917301 |
Method for generating a motion profile of a motor
Methods and systems consistent with the invention generate a motion profile of a motor. A reference acceleration profile, a reference velocity profile, and a reference displacement profile are...
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5886492 |
Servo control apparatus and method for video cassette tape recorder
An improved servo control device and method for a VCR that minimizes jitter caused in a reproducing mode of the VCR (reproducing VCR) when it reproduces a video signal recorded by another VCR...
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5869941 |
Air breaking type machine tool
The present invention provides an air bearing type machine tool capable of carrying out a process with a high load for cutting iron or the like and controlling the degree air is used. The air...
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5767635 |
Displacement machine with electronic motor synchronization
In a displacement machine for compressible media having at least two rotors (14a-c) which are configured as profiled bodies and whose profiles engage with one another in the manner of gearwheels...
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5729113 |
Sensorless rotor velocity estimation for induction motors
A method for estimating rotor shaft velocity includes adding two counter rotating signal components to a fundamental motor control signal to provide a combined control signal; sensing at least one...
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5694016 |
Method for controlling a servo system having friction
A method for controlling a servo system (10) having friction, in which the non-linear characteristic (20) of the position controller (12) is defined such that the magnitude of the variable Ns, Vs...
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5670856 |
Fault tolerant controller arrangement for electric motor driven apparatus
A fault tolerant controller arrangement for electric motor driven apparatus is implemented by a plurality of control channels, each of which includes a motor and associated drive circuitry. The...
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5637972 |
Rotor position encoder having features in decodeable angular positions
A rotor position encoder for an electric motor includes a discate member mounted to rotate with the rotor shaft. The encoder has a set of radially extending features formed with angularly evenly...
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5589748 |
Position control system and position control method thereof
A position control system for feeding back position information detected by position detection means for detecting the position of a machine movable part, is disclosed. The system includes a second...
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5543699 |
Random infeed timing device and methods
A device (10) is disclosed including a discharge unit (54) having a vertical conveyor (56) formed by a pair of vertically arranged belts (58) each including circumferentially spaced shelves (60)...
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5543696 |
Position control for hybrid servomechanisms
A hybrid servomechanism includes a speed control, a rotor position control and a brushless motor. When enabled, the position control commands a stationary stator mmf vector, allowing the motor's...
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5539293 |
Rotor position encoder having features in decodable angular positions
A rotor position encoder for an electric motor includes a discate member mounted to rotate with the rotor shaft. The encoder has a set of radially extending features formed with angularly evenly...
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5517097 |
Controlling apparatus and controlling method in machine tool
A machine tool controlling apparatus and method wherein the current operation is in a normal operation mode or in a positionly synchronized operation mode in which a spindle and a subordinate axis...
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5444346 |
Control system for actuator applicable to servo system having low resolution sensor and in feedback control mode
In a control system for an actuator applicable to a servo system in which a low resolution sensor and/or an operation detection signal having noise components is used as a feedback signal, a...
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5440213 |
Collision detecting method using an observer
A collision detecting method for quickly securely detecting a collision between a driven body driven by a servomotor and an obstacle by using an observer, thereby preventing machine components from...
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5391970 |
Motion controller with remote linking and time disturbance correction
Multiple motion controllers for controlling servo motors are connected by a digital communications link so that controlled axes of the motion controllers may be slaved together regardless of their...
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5367237 |
Electromechanical actuator controller
An improved electromechanical actuator controller or system, counteracting the control stability degradation caused by motor interaction with the load dynamics (actuator compliance), having...
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5332955 |
Position sensing apparatus with continuous update
A position measurement system includes position error circuitry (PEC) that responds to periodically provided actual position information and a computed position to provide correction information,...
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5331263 |
Velocity control device
A velocity control device is disclosed having feedforward signal applied to a velocity servo loop. An actuator moves a laser beam spot to a desired track of an optical disk. A displacement of the...
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5309074 |
Numerical control device with speed override control
A multi-system numerical control device which receives input commands for each system and is operative to control the speed and acceleration/deceleration of corresponding moveable objects, such as...
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5307206 |
Image stabilization assembly for an optical system
An arrangement for stabilizing the line of sight in an optical tracking system relative to inertial space over a specified range of frequencies utilizing a mirror/torquer/pickoff subassembly both...
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5304905 |
Motor servo-system controller having comparison of detected current with model current integrations
To set the magnitude of the inertia of a motor and mechanical system or set gains suitable for the magnitude of vibrations of the motor and the mechanical system, the magnitude of a load inertia is...
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5272423 |
Velocity control method for a synchronous AC servo motor
The present invention relates to a velocity control method for a synchronous ac servo motor, more particularly, to a velocity control method for an ac servo motor, in which the motor is controlled...
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5264767 |
Electro-hydraulic control apparatus for improved hydraulic pressure control
An improved method of controlling an electro-hydraulic control system by developing a motor control command in relation to the desired force to be exerted by an electric motor on a mechanical...
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5254921 |
Abnormality detecting method for a servo system
An abnormality detecting method for a servo system capable of quickly detecting an abnormal condition even in a low rotation speed range is provided. While a digital servo control section (11-13)...
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5231341 |
Limiter circuit of servo motor control apparatus
A limiter circuit of a servo motor control apparatus can perform limiter control in the right direction or reverse, direction or in both directions of a motor therefore. There is provided a...
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5221884 |
Numerical control apparatus
The operation of positioning a machine by a numerical control apparatus is completed when it is determined that a current feedback value of a motor, which varies in response to deflection of the...
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5189968 |
Digital controller with A.C. induction drive for sewing machines
Apparatus for use with an A.C. induction motor drive for a sewing machine to supplant a clutch-brake mechanism by supplying an A.C. induction motor drive to supply power to the motor to control its...
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5184055 |
Device for positioning control
A device for positioning control includes a movable stage; an acceleration sensor disposed on the movable table; a feedback loop for controlling movement of the movable table; and an acceleration...
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5159250 |
Robot control method
A robot control method utilizing a convolution in which a calculating method is simple. Simultaneously, a synchronous operation of a multi-shaft system, such as a computerized numerical control...
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5142207 |
Acceleration and deceleration method for transferring device
An acceleration and deceleration method with steps that calculate transferring distance, average transferring speed in the x-direction and y-direction, intermediate destination position at every...
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5140238 |
Robot control apparatus
A robot control apparatus includes a sine wave signal-outputting device, an operating device, a command device for outputting a current value, a substracting device, an electric power amplifying...
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5134354 |
Servo motor control apparatus
When a workpiece is cut or otherwise machined by a machine using a servo motor control apparatus having a position feedback loop, a velocity feedback loop, and a current feedback loop, it is the...
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5119005 |
Controller for non-linear position servo
A servo control system (100) for controlling a prime mover (16) to position a load (12) to a commanded position in accordance with the invention includes a position sensor (14) for providing a load...
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