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8183809 |
Drive device for at least one electric motor and drive control unit interacting with the drive device
A drive device for an electric motor is provided. The drive device decides based on signals it receives from outside whether it is monitoring an actual value of the electric motor with respect to...
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8179072 |
Method for counting the number of revolutions of a burr of a coffee mill and appliance comprising such a mill
A method for counting the number of revolutions of a burr of a coffee mill driven in rotation by an electric motor. According to the method: at least one electrical parameter Pi of the motor that...
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8169178 |
Detection of the angular position of the rotor of a brush motor without using sensors
A method of detecting an angular position of a rotor of a motor includes detecting switching ripple peaks and armature current disturbance peaks using a peak detector configured to generate a...
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8169177 |
Electric vehicle
An electric vehicle includes a control unit having overcurrent generation judgment unit, inverter selection unit, and inverter drive control unit. The overcurrent generation judgment unit judges...
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8164298 |
System and method for detecting loss of isolation while an AC motor is operating
Methods and systems are provided for detecting loss of isolation of a motor, connections, or phase cables while an AC motor is operating. The system includes a power supply that is substantially...
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8159792 |
Motor control device
In a motor control device that drives a plurality of motors with one DC power supply, detection of a short circuit fault occurring in the motors is realized with an inexpensive configuration. In...
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8154417 |
Compact self-contained condition monitoring device
The present invention provides a new and unique method and apparatus for monitoring a device, such as a pump. The device may also include a fan, compressor, turbine or other rotating or...
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8140291 |
Stator turn fault detection apparatus and method for induction machine
A system and method are provided for correction of parameters used in determination of stator turn faults of an induction motor. An embodiment may include determining a residual impedance and/or a...
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8135551 |
Robust on line stator turn fault identification system
A system and method for identifying turn faults in a stator of a motor are provided. The method includes determining a normalized cross-coupled impedance from the symmetrical components of measured...
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8108191 |
Electric motor simulator and method for testing motor driver devices
Apparatus to exercise electrical motor drivers by electrically simulating a geared electric or electrical motor by providing an electronic load for the power signals that are applied to it. Current...
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8098036 |
Electric power tool
An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch...
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8076888 |
Method for protecting an electronic device driven by DC motor and circuit for detecting positioning signals thereof
A method for protecting an electronic apparatus driven by a DC motor and a detection circuit for detecting positioning signals thereof. The electronic device includes an optical encoder, a code...
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8072169 |
Method of controlling washing machine and motor
A method of controlling a washing machine and a motor determines whether a BLDC motor is in a normal state in software without hardware and a user is notified of an abnormal state of the BLDC motor...
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8063591 |
Motor driving device and method for making judgment on state of motor driving device
The motor driving device includes a first function of supplying power to a motor so that the motor generates a driving force to drive a driven member, a second function of detecting a current...
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8065050 |
Method and apparatus for detecting an insufficient phase current in a permanent magnet synchronous motor
A method is provided for detecting an insufficient or missing phase current in a permanent magnet synchronous motor, and includes determining a composite vector position of a combined three-phase...
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8061893 |
Testing system and method for motor
A testing system for testing a temperature characteristic of a first motor includes a second motor, a controller, a driver, a load, a temperature sensor, and a temperature recorder. The controller...
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8054026 |
Short circuit phase identification method
A vehicle drive apparatus includes a battery that is a direct current power source, a converter that increases the voltage of the battery, an inverter connected to a motor that drives the vehicle,...
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8040096 |
Rotary electric system with star-connected multiphase stator windings
In a rotary electric system, a switch member includes at least one of a first switch and a second switch. The first switch is connected between a neutral point of multiphase stator windings and a...
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8024120 |
Complex phase locked loop
A method of estimating an instantaneous frequency of a component of interest in a complex primary signal via a complex Phase Locked Loop (PLL). A complex incident signal including a complex...
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8013557 |
Motor protection device and method
A motor protection device includes a detection unit for detecting an operating state of a motor and outputting a detection signal; a reference unit for generating a variable reference signal; a...
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8010318 |
System and method to determine electric motor efficiency nonintrusively
A system and method for nonintrusively determining electric motor efficiency includes a processor programed to, while the motor is in operation, determine a plurality of stator input currents,...
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8004226 |
Method and system for detecting a failed current sensor in a three-phase machine
A method of detecting one or more failed current sensor and estimating a phase current for the failed current sensor on a three-phase machine is disclosed. The method may include detecting one or...
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7960927 |
Electric motor control device and drive unit
An electric motor control device includes a power supply unit that supplies power to a three-phase electric motor; a three-phase current sensor that individually detects three respective phase...
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7960999 |
Methods and systems for evaluating permanent magnet motors
A method for evaluating a permanent magnet motor, which includes a rotor with a plurality of magnets mounted thereon, and a stator with a plurality of windings in proximity to the rotor and coupled...
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7952314 |
Electronic control device of an electrical drive system with redundant disconnection device
In normal mode, a central unit of an electronic control device receives desired and actual values for determining desired current values which are transmitted to an electronic drive unit. The...
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7952318 |
System and method for determining stator winding resistance in an AC motor
A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an...
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7948194 |
Waveform current monitor using RDSon of low-side bridge FET
An apparatus for monitoring current for a motor drive including at least high-side and low-side switching transistors includes a driver circuit for driving a gate of the low-side switching...
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7944165 |
Inspection system with dual encoders
A dual encoder motion control system for high speed and high resolution motion control of a spindle is described.
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7919946 |
Detection method for an electrical polyphase machine
The recognition of a polyphase machine (1) connected to a converter (10) is suggested in order to adapt the converter (10) to the connected machine (1) prior to an active productive operation. The...
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7911170 |
Sensorless measurement of the rotation frequency of a rotor of an asynchronous machine
The present invention relates to a device (20) and a method for sensorless measuring a mechanical rotor frequency of a rotor (6) of an asynchronous machine (40), wherein the rotor (6) has a...
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7911176 |
Systems and methods involving permanent magnet electric machine rotor position determination
A method for determining rotor position comprising sending a signal to a stator, receiving a first signal indicative of a first estimated stator inductance, and receiving a second signal indicative...
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7898203 |
Systems and methods for dynamically compensating motor resistance in electric motors
Electric motor controllers that dynamically adjust a motor resistance parameter are described. In order to adjust the motor resistance parameter, power is applied the electric motor while the...
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7895003 |
Vibration protection in a variable speed compressor
Vibration protection in a compressor system with a variable speed compressor may include operating a variable speed compressor at a plurality of frequencies, measuring a plurality of vibration...
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7884563 |
Motor and drive control system thereof
Provided is a motor having a magnetic polar unit in which a permanent magnetic polar array having arranged therein alternately a plurality of permanent magnetic polar elements in alternate opposite...
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7880460 |
Hardware in the loop motor simulation
A simulator system is connected to simulate the connection of a mechanically loaded motor to a motor controller/driver. The simulator system includes a current transformer circuit for monitoring AC...
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7863786 |
Drive apparatus for a washing machine
A drive apparatus for a washing machine includes an electric motor, a drive shaft connected to the electric motor for rotary drive purposes and electronics for controlling operation of the electric...
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7865324 |
Encoder signal analysis system for high-resolution position measurement
An apparatus and method for identifying the position of a magnetic shaft are provided. N field sensors are adjacently positioned at fixed locations relative to the shaft's periodic field,...
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7852022 |
Control apparatus for electric car
A control apparatus for an electric car, including a power converter which feeds AC power of variable voltage and variable frequency to a primary side member of a linear electromagnetic actuator,...
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7852027 |
Method and circuit for testing motor
A method for testing a motor having a rotor and a winding is provided. The method includes steps of (a) providing a power to rotate the rotor to a predetermined speed, (b) removing the power, (c)...
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7843152 |
Motor control apparatus
A motor control apparatus comprises a control processing unit (3) creating a motor drive command, power supply processing units (2A to 2D) supplying a driving voltage to a motor, and a signal relay...
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7839109 |
Method of controlling a motorized window treatment
A method of controlling a motorized window treatment provides for continued operation of the motorized window treatment during an overload or low-line condition. The motorized window treatment is...
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7834573 |
Winding fault detection system
A control system is disclosed. The control system has an electric machine coupled to provide power to or receive power from a DC bus and a controller in communication with the electric machine and...
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7830107 |
Safety device for power window
A safety device for power window comprises a storage unit for storing the pulse width change rate of continuous pulses detected by a pulse width detector during a window glass raising operation at...
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7825620 |
Controller and constant measuring apparatus for AC motor
A controller and a constant measuring apparatus have a means for supplying a synthesized current, resulting from superimposing an AC current to a DC current, from an inverter and for changing the...
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7805270 |
Encoder signal analysis system for high-resolution position measurement
An apparatus and method for identifying the position of a magnetic shaft are provided. N field sensors are adjacently positioned at fixed locations relative to the shaft's periodic field,...
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7791309 |
Motor controller and method of controlling the motor
The present invention relates a motor controller and a motor control method of controlling a motor having a stator coil and a rotator. The motor controller includes: an activating operator...
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7791237 |
Fault-tolerant synchronous permanent magnet machine
A fault tolerant synchronous permanent magnet machine is disclosed that reduces rotor losses by limiting eddy-current losses in the retaining sleeve. The machine limits eddy-current loss by any one...
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7764038 |
Devices, systems, and methods for relieving stress
Certain exemplary embodiments comprise a method that can comprise, via a device that originates sub-harmonic vibrations, applying a vibration treatment, to a rotor of an electric motor for a...
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7759966 |
Methods and systems for evaluating permanent magnet motors
A method for evaluating a permanent magnet motor, which includes a rotor with a plurality of magnets mounted thereon, and a stator with a plurality of windings in proximity to the rotor and coupled...
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7759890 |
Control device of electric power steering apparatus
There is provided a control device of an electric power steering apparatus controlling a motor for applying steering assist torque to a steering mechanism through a driving part. The control device...
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