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7474073 |
Method and system for multiple servo motor control using a single control loop
The solution involves the use of two or more motors to drive a common mechanism. The single control loop includes a position sensing device coupled to only a first of the plurality of servo motors...
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7474067 |
Electric power steering system
There are provided a high-order current distortion compensator which uses rotational position information on an electric motor and a target current value of the electric motor for deciding a...
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7474068 |
Position detection and external driver multiplexing system for DC motors
A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the...
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7474071 |
Electric motor regulation with controlled error intercept
A motor is controlled by a motor control signal so that it reaches a target state, which is derived from sensor data sensed by a sensor. The motor can be put into a rest state at the occurrence of...
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7466906 |
Motor control apparatus
A motor control apparatus includes a target value computation device which computes a target value of a current to be passed through a motor, a current detection device which detects a current...
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7466100 |
Digital high-resolution controller
Kinematic control of an electronic positioner and its associated actuator is effected through a control algorithm that delivers energy to the actuator based on observed motion produced by a...
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7463003 |
Motor control system for controlling a plurality of motors
A motor control system for controlling a plurality of motors for moving an object in respectively different axial directions that includes a plurality of target devices, each target device...
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7463464 |
Method and apparatus for sensing brushless DC motor average current from overcurrent protection circuitry
A method and an apparatus that permit the measurement of the motor average current directly from the output of the amplifier and filter stage used for instantaneous dc-link overcurrent protection....
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7456595 |
Method and apparatus for adaptive control of a disk drive in the presence of non-linear magnetic bias
According to a preferred aspect of the instant invention, there is provided a system and method of moving a disc drive arm in the presence of nonlinear magnetic bias. Further, in another preferred...
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7453223 |
Method for active compensation of oscillations in a machine which processes printing material, and a machine which processes printing material
For the active compensation of oscillations in a machine which processes printing material, a signal which contains an oscillation of the machine or of a part of the machine is measured and at...
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7453222 |
Sun roof drive device
The sun roof drive device opens and closes a vehicle sun roof by a DC brushless motor, which is driven by rectangular waves when high torque is required at a low rotational speed and which is...
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7450356 |
Rotation speed controller for fans
A specially designed rotation speed controller for fans, in addition to basic components like variable resistor, the controller has also been equipped with special components such as TRIAC, micro...
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7446494 |
HVAC actuator having torque compensation
A method and system are disclosed for adjusting the torque of a motor for a HVAC actuator based upon one or more operating conditions of the HVAC actuator. One illustrative HVAC actuator includes...
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7443116 |
Electrically powered vehicle mounting electric motor and control method therefor
A normal map determines a carrier frequency used for switching control of an inverter controlling driving of a motor generator, in accordance with the state of operation of the motor generator in a...
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7439701 |
Method and device for detecting initial excitation phase of stepping motor
A method and device for detecting an initial excitation phase of a stepping motor is provided, by which an initial excitation phase of a rotor corresponding to a position of a stopper can be...
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7436147 |
Motor driving apparatus
A motor driving apparatus drives a motor by means of an AC/AC direct converter such as a matrix converter. The motor driving apparatus is provided with a current detecting section for detecting...
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7436138 |
Methods and systems for emulating an induction motor utilizing an electronically commutated motor
A method for emulating induction motor operation using an electronically commutated motor (ECM) is described herein. The method includes receiving, at the ECM, a desired operating torque, accessing...
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7436144 |
Inverter apparatus
A CPU calculates, based on a frequency command value for driving a motor and on a state quantity of the motor, an output-voltage command value in which only the phase advances while amplitude is...
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7433164 |
Ceiling fan motor control module
A ceiling fan motor control module includes a digital core controller coupled to a brushless motor for computing, processing, transmitting and controlling signals and providing a soft start and...
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7429847 |
Motor control device
A controller performs processing for calculating a main torque control value, processing for outputting a final control torque value based on the main torque control value and a...
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7429840 |
Control of an electrical reluctance machine
An electrical machine having stator ( 30 ) and rotor ( 31 ) is disclosed. The motor has field windings (F) and armature windings (A) energized by a suitable power electronic controller ( 401 ). A...
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7427843 |
Electrically operated power steering controller and adjusting method of driving electric current offset in this controller
The invention proposes an electrically operated power steering controller for inputting a driving electric current offset value of higher accuracy and being able to make an offset correction of a...
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7427842 |
Series motor and method of controlling the same
A circuit for a series motor for a power tool is disclosed, wherein reliable switching is achieved by means of two electronic switches, without the use of a mechanically disconnecting switch. To...
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7423397 |
Electric power steering device
An electric power steering device to control a motor based on steering torque generated in a steering shaft and supply an auxiliary steering force conforming to the steering torque to the steering...
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7423395 |
Sensorless vector control method for alternating-current motor and control apparatus therefor
It is the objective of the present invention to provide a sensorless vector control method and a control apparatus, for an alternating-current motor, that can smoothly restart an...
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7423393 |
Car control method and car control apparatus
A car control apparatus including a wheel sensor, wheel torque calculating means for calculating wheel torque from the wheel speed, drive force detecting means for detecting drive force generated...
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7423398 |
Elevator arrangement
The method of the present invention can be used to monitor and predict the condition of an automatic door of an elevator or more generally an automatic door in a building. In the method, the...
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7420343 |
Current limiting DC motor starter circuit
A current limiting DC motor starter employing a closed loop current measurement to provide precise current control that adapts to changing motor conditions, integrated with a solid state reversing...
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7417393 |
Load driver capable of suppressing overcurrent
A control device determines whether a motor generator is controlled in a PWM control mode, an overmodulation control mode or a rectangular-wave control mode. If a command to perform a boosting...
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7417395 |
Switch-based door and ramp interface system
An interface system is presented, which prevents operational interference between a vehicle power door and a ramp of an access system by interrupting power to the motors and actuators responsible...
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7417392 |
Electronic line shaft with phased lock loop filtering and predicting
An improved electronic line shaft provides for a predictor sending predicted position and/or velocity values to servant drives that may be later strobed in by high speed low-latency strobe signals...
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7414377 |
System and method for automatic current limit control
A motor controller system comprises solid state switches for connection between an AC line and motor terminals for controlling application of AC power to the motor. A sensor senses AC line voltage....
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7411366 |
Electric power-assist system for manually-operated vehicle
An electric power-assist system for a manually operated vehicle, such as a bicycle, has a pedal with Hall sensors for producing a signal representing a rotational speed of the pedal, and an...
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7411367 |
Full bridge circuit and DC motor capable of fixing output voltage and avoiding reverse current
A full bridge circuit includes a first switch, a second switch, a third switch, a fourth switch, a first controller, a second controller, a first operational amplifier, a first multiplexer, a...
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7405525 |
Method for the control of an electric machine and/or device for the control thereof
The invention relates to a method for the control of an electric machine ( 5 ), wherein a control unit ( 1 ) comprises a parameterisable speed control ( 26 ) and a parameterisable additional...
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7402970 |
Electric power steering device
The present invention includes a control part for controlling switching elements on diagonal lines in the upper and lower stage of an H bridge circuit respectively by different duty ratios based on...
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7400107 |
Surgical machine and method for operating a surgical machine
To improve a surgical machine with an electric motor comprising a rotor and a plurality of motor windings, and with a motor controller for controlling and/or regulating the electric motor so that,...
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7400101 |
Method for detecting rotor angle of DC brushless motor and controller of DC brushless motor
A method and an apparatus accurately detect a rotor angle of a DC brushless motor by using a first-order difference of a detected value of a phase current. A periodic signal causing the total sum...
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7395124 |
Adaptive motor drive method and apparatus including inertia estimator
A method and apparatus for use with a plant drive system that receives a reference command signal and generates a torque command to drive a plant, the method for estimating plant inertia and...
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7394214 |
Control unit for electric power steering apparatus
In order to solve a problem that a motor generates a noise so as to deteriorate an environment in a vehicle if a field weakening control is executed to the motor of a electric power steering...
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7391175 |
Device and method for driving electric actuator
A smart actuator that includes a driving device and an electric actuator such as a DC motor includes a driving current detecting circuit, a driving circuit connected to the electric actuator, a...
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7388342 |
System and method for controlling a motor using forced speed control
A system and method for operating a motor drive unit. The motor drive unit is coupled to a motor driving a load and is configured to selectively control the motor according to a torque control mode...
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7388346 |
Adjustment method of rotor position detection of synchronous motor
To obtain an adjustment method of rotor position detection of a synchronous motor with excellent productivity. An adjustment method of rotor position detection of a synchronous motor, wherein a...
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7385367 |
Motor control method and motor controller
A motor speed, duty, and power source voltage are detected (steps S 1 to S 3 ). Referring to a load point map, a load point value is obtained (steps S 4 and S 5 ). The load point map is created...
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7382105 |
Motor driving device and electric power steering apparatus
In a motor driving device where a motor having a winding wire with small inductance value is driven by a digital control means comprised of control means including a current command value...
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7382107 |
Shift range switching apparatus
By utilizing a mechanical backlash generated between an electric actuator and a shift range switching mechanism, a specific region is obtained, in which a variation in the output shaft angle is...
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7380634 |
Electric power steering apparatus for vehicle and method for installing the same on vehicle
When the disclosed electric power steering apparatus designed for use in a right/left-hand-drive vehicle is installed on a left/right-hand-drive vehicle, methods of (1) mirror-reversing the...
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7375485 |
Control systems and methods for starting permanent magnet rotating machines
Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a...
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7375481 |
Method of controlling motor thermal protection for an electric power steering system of a motor vehicle
The invention relates to motor vehicles which are equipped with an electric power steering system. Using a known method, the value of the maximum current that is allowed to travel through the...
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7375934 |
Power converter controlling apparatus and method applying a fault protection scheme in a motor drive system
A method and apparatus control a power converter ( 20 ) of a motor drive system. The power converter ( 20 ) is controlled during a first operating mode by applying a current control scheme, which...
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