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7623327 |
Motor protective device
A heating value calculation part obtains a substantial heating value based on the difference between a heating value and a radiating value attributed to a motor supply current. The radiating value...
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7622877 |
Method and system for controlling permanent magnet AC machines
Methods and systems are provided for controlling permanent magnet machines under varying loads. The method comprises generating a d-axis voltage command and a q-axis voltage command, producing a...
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7619380 |
Method and apparatus for controlling rotational speed of fan
An apparatus for controlling rotational speed of a fan includes a sensor module, a single chip microcomputer (SCM) module, and a driving module. The sensor module collects rotational speed signals...
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7615950 |
Control device for hybrid electric vehicle
Driving forces of an engine and an electric motor can be transmitted to driving wheels, and the engine and the driving wheels can be mechanically connected and disconnected by a clutch. A vehicle...
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7612513 |
Control device equipped with motor protection function
A synchronous motor control device having an optimal protection function in accordance with an operational state of a motor is provided. The motor control device includes a position detecting...
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7609014 |
System and method for universal adaptive torque control of permanent magnet motors
A system and method for controlling any of a variety of permanent magnet motors includes normalizing motor parameters with respect to demagnetization current of a motor and developing a...
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7605554 |
Anti-pinch window control system
Methods are provided for detecting and alleviating the pinching of an object in a window of a vehicle having a drive unit motor controlling a window based upon current signals received from a...
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7598691 |
Current control device and method
A current control device for a fan motor includes a current sampling module, a signal generating module, a current detecting module and a current controlling module. The current sampling module...
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7595601 |
Electric bolt/nut fastener
An abrupt fall in a current value immediately after an abrupt rise at the time when an starting switch is turned ON is detected, when the current value rises due to starting of nut fastening and...
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7595600 |
Method and system for torque control in permanent magnet machines
Methods and systems are provided for controlling permanent magnet machines. The method includes determining a maximum torque of the PM machine based on an error between a commanded d-axis flux and...
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7592770 |
Parking control technique for permanent magnet motor drives with sinusoidal BEMF
A method and system for controlling a current regulator motor control for parking a motor rotor in a predetermined position, wherein a first current command and a first angle command are supplied...
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7586277 |
Electric power steering device
An electric power steering device changes the discontinuous non-linear characteristics in the duty ratio of the PWM signal versus motor current generated during steering wheel handle return into...
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7579800 |
Motor control method and device thereof
A motor control apparatus comprises the amplitude adjustment section and the peak voltage control section so as to adjust the torque control output in correspondence with the output voltage of the...
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7573219 |
Drive belt slip detection
A method and apparatus is disclosed for detecting whether belt slip is occurring between an electric machine and a machine drivingly connected together by a drive belt using only measurements of...
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7570000 |
Control drive circuit for electric power tool
In a control drive circuit for an electric power tool, a bridge-structured motor, which has a bridge structure and includes switching elements and a motor body, is connected to a power supply unit...
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7569999 |
Motor control device
A motor control device has a target speed generating unit for generating a generated target rotational speed, speed detecting units for detecting rotational speeds of each of the plurality of...
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7567047 |
Electric motor control strategies for using a low resolution position sensor
An electric motor control strategy includes using a low resolution position sensor that provides a square wave output signal. The position sensor information is converted into sinusoidal...
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7564207 |
Peak hold circuit, motor drive control circuit having the peak hold circuit and motor apparatus having the motor drive control circuit
A peak hold circuit is provided that operates stably even if a peak voltage to be held of a motor-drive-current detection voltage is minute. The peak hold circuit includes: a level shift circuit...
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7560886 |
Motor controlling device for mounting on vehicle
A motor controlling device for mounting on a vehicle, which includes a controller capable of controlling a DC brushless motor at high response and high accuracy. The motor controlling device for...
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7557527 |
Electrical power converter and control method
An electrical power converter comprises a first direct current line connected to a first direct current source, a second direct current line connected to a second direct current source, an...
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7554281 |
Synchronous machine control apparatus
A synchronous machine control apparatus which can produce a torque level as close as possible to a desired torque command level while considering limitations on an output current of a power...
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7551411 |
Control and protection methodologies for a motor control module
A motor control module designed to control operation of a plurality of different motors in a plurality of different tools a power tool uses an electronic clutch in the module in conjunction with a...
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7550940 |
Overload current control circuit for a DC motor
An overload current control circuit for a DC motor comprises: a DC motor, a DC power source, a power semiconductor assembly, and a sampling resistor that are connected in series. The overload...
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7548035 |
Control apparatus of electric power steering apparatus
The invention relates to a control apparatus of an electric power steering apparatus structured such as to apply a steering assist force generated by a n-phase motor to a steering system of a...
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7545111 |
Testing inverter driven electric motor shut-off path
A method for testing electric motor shut-off including injecting current into an electric motor, applying at least one of a short or an open to the electric motor for a predetermined length of...
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7541762 |
Control circuit for a fan
A control circuit for controlling rotational speed of a fan for an electronic device includes a temperature detecting unit for detecting an ambient temperature of the electronic device, and...
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7541756 |
Temperature compensated test for a power distribution switching device
An actuator, such as a motor of a power distribution switching device, may be operated by measuring at least one temperature parameter associated with an energy storage device (e.g., a battery) of...
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7538992 |
System, device, and method for over-current relays protecting motors
A system, method, and device for protecting an induction motor are disclosed. The exemplary system may have a module for determining the current drawn by the motor and a module for determining the...
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7528568 |
Vector controller for permanent magnet synchronous motor
A vector controller for a permanent magnet synchronous motor according to the present invention has a motor constant identifying unit for identifying motor constants of the permanent magnet...
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7528562 |
Method and apparatus for controlling an electric motor using star voltage modulation
A method for controlling an electric motor includes the step of determining multi-phase voltage demand values. The method also includes the steps of determining a star voltage (vstar) of the...
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7525443 |
Method and apparatus for machine state quantification in machinery management systems
A method for determining a steady state operating condition of a machine includes determining whether a current machine speed of the machine is within a defined range of operation, determining...
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7525271 |
Motor driving circuit having low current consumption under a standby mode
A power cutter, an oscillator, a counter, a S-R latch, and a Hall bias are further disposed inside a DC motor driving circuit so that current consumption of the DC motor driving circuit is reduced...
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7525270 |
Motor control apparatus
A motor control apparatus for controlling a motor with reduced noise and vibration includes a detecting means for detecting a rotational speed of the motor, a command signal processing means that...
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7525269 |
Method and apparatus for sensorless position control of a permanent magnet synchronous motor (PMSM) drive system
Methods and apparatus are provided for generating zero-sequence voltages based on voltage commands and a motor output signal. At least one of the methods includes, but is not limited to, receiving...
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7523806 |
Method and system for improved active damping of steering systems
A method for generating an active damping torque signal for a vehicle steering system includes receiving a vehicle speed input, receiving a handwheel velocity input, receiving a handwheel torque...
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7521889 |
Method of braking induction motor and control apparatus
In a DC braking method for stopping an induction motor, torque shock generated by an abrupt change of an output current phase is reduced to a predetermined value or less when a switch-over from a...
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7518330 |
Protect-control device capable of limiting current for reducing noise resultling from switchover of motor
A protect-control device capable of limiting current for reducing noise resulting from switchover of a motor includes a motor coil set, a driving unit, a sensing unit and a control unit. The motor...
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7514891 |
Method and arrangement for monitoring a power output stage
The invention relates to a method and arrangement for monitoring a power output stage, whereby the power output stage has at least one half bridge, comprising a series circuit of two semiconductor...
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7514890 |
Surgical machine and method for controlling and/or regulating a surgical machine
To improve a surgical machine with a sensorless electric motor comprising a rotor and at least two motor windings, and with a motor controller for controlling and/or regulating the electric motor,...
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7514889 |
Steering controlling device
A steering controlling device comprising a power source, a motor connected to a steering system, a motor driving circuit converting a power source voltage to a predetermined voltage and applying...
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7492114 |
Electric vehicle drive control device and control method therefor
An electric vehicle drive control device includes a first electric motor; a second electric motor; a differential device that includes first, second, and third rotational elements, wherein the...
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7489484 |
Protective device for a controlling system of a sewage pump
A protective device for a controlling system of a sewage pump has a protective circuit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by...
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7486490 |
Actuator for the actuation of a clutch and/or a gear mechanism
An actuator for a clutch or gear mechanism in a motor vehicle comprises an electric motor and an incremental encoder. The encoder comprises a position measurement signal output at which a position...
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7486041 |
Electric motor with adjustable timing
An electrically commutated motor includes a first module to measure a current in a coil of the motor, and a second module to adjust timing of commutation of the motor based on the current measurement.
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7486040 |
Circuit to momentarily increase the peak torque of a DC motor
A motor control circuit for supplying power to a DC motor which drives a mechanism having a driven shaft, the control circuit having a parallel combination of a capacitor and switch in series with...
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7479748 |
Systems and methods of tracking partition system performance
A method of monitoring the operation of a partition movement system having a partition. In an embodiment, the method includes monitoring a parameter having a relation to movement of the partition,...
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7477031 |
Control device for hybrid electric vehicle
A hybrid electric vehicle is arranged such that a driving force of an engine and a driving force of an electric motor can be transmitted to driving wheels through a transmission and that the engine...
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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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7474070 |
Electric power steering apparatus
A torque detection portion includes a first arm having a detection coil L 1 and a resistor R 1 , and a second arm having a detection coil L 2 and a resistor R 2 . When a test mode is set, a...
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7474069 |
Circuit for using the sign transitions of a motor phase and a motor phase back EMF currents to control PWM
A circuit for optimizing power transferred from an inverter circuit to a motor, the circuit using an open loop method to start-up the motor and have it reach a minimum speed, each phase of the...
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