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US20110084638 METHODS, SYSTEMS AND APPARATUS FOR DYNAMICALLY CONTROLLING AN ELECTRIC MOTOR THAT DRIVES AN OIL PUMP  
Methods, system and apparatus are provided for sensorless control of a vector controlled motor drive system that includes an electric motor used to drive an auxiliary oil pump.
US20140055066 BRUSHLESS MOTOR CONTROL DEVICE AND BRUSHLESS MOTOR CONTROL METHOD  
After a rotor of a three-phase brushless motor is previously moved by a simple control method to a predetermined rotary position, a motor is started-up. A brushless motor control device (10) moves...
US20090033262 Sensorless controlling apparatus of brushless motor  
A sensorless controlling apparatus for controlling a brushless motor includes a speed calculator for calculating speed of a rotor ω, an angle calculator for calculating rotor angle θ at a...
US20110121768 MOTOR STARTING CONTROL METHOD, MOTOR DRIVING SYSTEM AND MOTOR SYSTEM  
A method for controlling starting of a motor is described, which is mainly applicable to estimate a possible initial position of a rotor of a motor by detecting a rotor rotation signal of the...
US20140217943 DETERMINING A POSITION OF A MOTOR USING AN ON-CHIP COMPONENT  
An embodiment of a motor controller includes first and second supply nodes, a motor-coil node, an isolator, a motor driver, and a motor position signal generator. The isolator is coupled between...
US20140327379 POSITION SENSORLESS DRIVE SYSTEM AND METHOD FOR PERMANENT MAGNET MOTORS  
A position sensorless drive systems for a permanent magnet motors are disclosed. An embodiment includes a square wave voltage source connectable to an input of a permanent magnet motor. At least...
US20150022131 ELECTRIC CIRCUIT AND METHOD FOR ESTIMATING THE ANGULAR POSITION OF A ROTOR OF AN ELECTRIC MOTOR, AND DEVICE FOR CONTROLLING AN ELECTRIC MOTOR  
Electric circuit for estimating the angular position of a rotor of an electric motor, including: a sensing module configured to receive at least one electric signal representative of a drive...
US20140111130 MOTOR DRIVE DEVICE  
A motor drive device is provided which allows control to be performed depending on a position of magnetic poles of a rotor even when a motor rotor angle sensor malfunctions. The device controls a...
US20140327380 CIRCUITS AND METHODS OF DETERMINING POSITION AND VELOCITY OF A ROTOR  
A motor controller includes a square wave voltage generator and adding circuitry for adding the square wave voltage to a first drive voltage that is connectable to the stator windings of a motor....
US20120194112 Electrical Brushless Motor  
An electrical brushless motor is described, as well as a ceiling fan utilizing the electrical brushless motor.
US20120086374 INVERTER DEVICE, MOTOR DRIVING DEVICE, REFRIGERATING AIR CONDITIONER, AND POWER GENERATION SYSTEM  
An inverter device, a motor driving device, a refrigerating air conditioner, and a power generation system, which can reduce the recovery loss thereof, are obtained. A plurality of arms that can...
US20080252244 SENSORLESS SPEED DETECTION OF A PM BRUSHLESS MOTOR WITH PHASE TERMINALS SHORTED  
A method of determining the speed of a spinning sensorless brushless motor driven by an inverter when the phase terminals of the motor are shorted including determining a voltage related to the...
US20110181227 Method of Determining the Position of the Drive Mechanism of an Electric Machine, Such as a Motor, from the Current Supplied, and Arrangement for Carrying Out the Method  
A method and arrangement for determining the position of the drive mechanism of an electric machine from the current supplied thereto. Determination of the position is effected over two...
US20140346991 METHOD AND SYSTEM OF INTERNAL TEMPERATURES DETERMINATION IN A SYNCHRONOUS ELECTRIC MACHINE USING STATE OBSERVERS  
The invention relates to a method of determining internal temperatures (2) (coil and magnet temperatures) in a synchronous electric machine (4) using state observers for the resistance of the...
US20100007297 Sensorless Drive for Unipolar Three Phase Brushless DC Motors  
A system for controlling a trapezoidally (square wave) driven DC motor includes a unipolar commutation circuit coupled between a DC power supply and a brushless DC motor. The motor has three...
US20090039810 SYSTEM FOR SEAMLESS ESTIMATION OF SPEED AND/OR POSITION, INCLUDING STANDSTILL OF A PERMANENT MAGNET ROTOR OF AN ELECTRIC MOTOR  
Procedure for determining the electrical drive speed (ωef) and/or position (φe) in a permanent magnet rotor of a brushless electrical linear or rotation machine from a measurement of a multi-phase...
US20120126730 METHOD FOR SENSORLESS OPERATION OF AN ECM, and MOTOR FOR CARRYING OUT  
An electronically commutated motor (ECM) often employs a Hall sensor for reliable operation. Even when a Hall sensor is omitted from a motor having a plurality of stator winding phases (24, 26)...
US20100295489 MOTOR DRIVE CONTROL APPARATUS  
There is provided a motor drive control apparatus that includes a resistor, which directly or indirectly detects a driving current supplied to a motor and generates a voltage corresponding to the...
US20140320052 CENTRALIZED MOTOR CONTROLLER  
A centralized motor controller for receiving commands from an application system controller and for controlling operation of a plurality of independent motors. The centralized motor controller...
US20150214871 Method and System for Determining Motor Shaft Position  
The present disclosure provides methods and systems for determining the rotor position of a BLDC motor having a saliency. Techniques according to the present disclosure advantageously may be used...
US20100097717 REDUCING THE SPECTRAL ENERGY OF TORQUE RIPPLE  
In BLDC motors driven via sensorless techniques, the BEMF signals in the motor coils may be used to detect the position of the motor such that speed of the motor may be accurately controlled. When...
US20130307453 VARIABLE GAIN AMPLIFIER, CURRENT DETECTING CIRCUIT USING THE SAME, MOTOR DRIVING CIRCUIT AND ELECTRONIC APPARATUS  
A variable gain amplifier includes: a first input terminal, a second input terminal and an output terminal; an operational amplifier; a first resistor interposed between the first input terminal...
US20130293171 Measurement Circuit  
A measurement circuit in a motor circuit generates signals for use in a motor control strategy for an electric motor. The measurement circuit comprises a first current sensing means which produces...
US20140184119 BRUSHLESS DIRECT CONTACT MOTOR DRIVING DEVICE AND METHOD OF CONTROLLING THE SAME  
There is provided a method of controlling a BLDC motor driving device, including aligning a rotor; storing alignment information of the rotor, determining whether the alignment of the rotor is...
US20140265968 Motor Control Loop with Fast Response  
A system and method of controlling a motor are disclosed. The system comprises a current observer for observing a motor current at a sampling rate and a proportionate-integral controller that...
US20120169264 METHOD AND APPARATUS FOR COMMUTATING A BRUSHLESS DC MOTOR  
Traditionally, controllers for brushless, sensorless direct current (DC) motors (in, for example, Hard Disk Drive applications) would use one of the phases of the DC motor to measure a back...
US20130141024 METHOD AND SYSTEM FOR CONTROLLING A PERMANENT MAGNET SYNCHRONOUS MOTOR  
A method is disclosed for controlling a synchronous motor by determining a rotor position of the synchronous motor based on estimating a flux linkage. The method includes applying a voltage of a...
US20140246939 MOTOR AND MOTOR SYSTEM  
The motor includes: a rotor that includes a rotor core provided with a plurality of permanent magnets in a circumferential direction; and a stator that includes a stator core on which multi-phase...
US20140049203 Motor Control Device  
The present invention relates to a motor control device provided with the function of detecting the rotor position of a synchronous motor in a sensor-less fashion. The motor control device...
US20090195200 ELECTRIC MOTOR DRIVE SYSTEM AND ELECTRIC MOTOR CONTROL METHOD  
An electric motor drive system having current detecting sections for detecting the currents flowing into electric motors, speed variation calculating sections for calculating the speed variation...
US20090140674 CONTROL APPARATUS FOR AC MOTOR  
It is attained by being provided with a motor constant calculation unit for calculating electric constants of a motor, and by correcting setting values of electric constants defined on one of the...
US20110169438 METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MOTOR USING ZERO CURRENT OFFSET VALUE CANCELLATION  
Methods and systems for controlling an electric motor are provided. The electric motor includes at least one winding. A winding current flowing through the at least one winding is monitored. The...
US20130193886 SENSORLESS CONTROL APPARATUSES OF MOTORS AND CONTROL METHODS THEREOF  
A sensorless control apparatus of a motor may include: a position estimator configured to compensate for a resistance and a magnetic flux of a permanent magnet of the motor according to a...
US20080309268 Initial Pole Position Estimating Apparatus and Method for Ac Synchronous Motor  
The present invention provides an initial pole position estimating apparatus and method for an AC synchronous motor without using magnetic pole detector. The initial pole position estimating...
US20130152892 ELECTRIC VEHICLE FLUID PREHEATER  
An electric vehicle powertrain includes a battery configured to couple with an external power source, a power plant including at least one three-phase electric motor, and a power controller...
US20090195198 MOTOR AND METHOD FOR STARTING THE SAME  
The method for initially starting the motor improves the reliability to the start of the motor. In particular, even though the external load is at more than a predetermined level, a rotor located...
US20100164428 METHOD AND SYSTEMS FOR AN ENGINE STARTER/GENERATOR  
A method and system for an engine starter/generator is provided. The starter/generator system includes a three phase squirrel cage induction machine, a three phase inverter/converter electrically...
US20140191694 ELECTRONICALLY COMMUTATED ELECTRIC MOTOR  
The invention relates to an electronically commutated electric motor. The electronically commutated electric motor has a power output stage connected to a stator of the electric motor, and a...
US20130307452 MAGNETIC POLE POSITION DETECTING DEVICE FOR DETECTING MAGNETIC POLE POSITION OF ROTOR IN PERMANENT-MAGNET SYNCHRONOUS MOTOR  
A magnetic pole position detecting device includes a calculating unit for correcting a magnetic pole position detected by a magnetic pole position detecting unit. In this magnetic pole position...
US20110304290 CONTROL APPARATUS AND CONTROL METHOD FOR ELECTRIC ROTATING MACHINE  
A controller outputting voltage instructions for drive control of an electric rotating machine adds, by using adders, position estimation voltage instructions for estimating the rotor position...
US20120181962 Method and Device for Monitoring and Correcting a Sensorless Rotor Position Detection in Permanently Excited Motors  
The invention relates to methods and devices for monitoring and correcting a sensorless rotor position detection in permanently excited motors, comprising a control device and a current converter....
US20140055067 MOTOR DRIVING SYSTEM  
A motor driving system is disclosed having a control device 4A for controlling a synchronous motor 1, the control device 4A comprising a sensorless control algorithm device 20 that includes an...
US20140028228 CONTROL SYSTEMS AND METHODS FOR ANGLE ESTIMATION OF PERMANENT MAGNET MOTORS  
An angle estimation control system of a permanent magnet motor is provided. The angle estimation control system includes a Clarke transform module, a Park transform module, and an angle estimation...
US20140070745 Applied-Voltage Electrical Angle Setting Method For Synchronous Motor, And Motor Control Apparatus  
An applied-voltage electrical angle setting method for a synchronous motor includes detecting applied voltage and current of the synchronous motor M, calculating current peak value Ip based on the...
US20090009114 SYNCHRONOUS MACHINE  
The invention relates to a synchronous machine provided with a stator and rotor, wherein the stator comprises stator teeth (1) provided with respective tooth tips in the bore hole thereof and...
US20120118662 MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING SYSTEM  
A motor control device with which both high-accuracy current detection and improvement in voltage utilization factor are achieved is provided. When an ON time of any one of low potential side...
US20130314016 MOTOR CONTROL DEVICE  
A motor control device includes feed-forward control means for detecting a change amount of a predetermined monitoring target, which is used for changing the number of revolutions of a motor...
US20150249408 Method to Control a Switched Reluctance Machine  
A method to control the rotor position in a reluctance machine involves energizing the phase winding so to move the rotor relative to the stator, freewheeling current through the phase winding...
US20110006715 Control Unit and Control Method for Permanent Magnet Synchronous Motor  
If magnitude relations between the output terminal voltage based on a DC negative terminal of the inverter and a threshold voltage that is a fixed value are compared, polarity thereof is changed...
US20120249033 SENSORLESS MOTOR CONTROL  
An method for driving a motor is provided. A plurality of pulse width modulation (PWM) signals are generated from a commanded voltage signal and a commanded angle signal, and these PWM signal are...
Matches 1 - 50 out of 112 1 2 3 >