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| Application No. | Application Title | Issue Date |
| 20110234147 | CONTROLLER FOR SPINDLE WITH ENCODER A controller controls the rotational speed of an induction motor, thereby controlling a spindle connected to the induction motor. Although an encoder for detecting the position of the spindle is mounted on the spindle, a speed detector is not attached to the induction m... | 09/29/2011 |
| 20110234146 | CONTROLLER OF SPINDLE PROVIDED WITH ENCODER The controller controls a spindle connected to an induction motor via a belt by controlling the rotational velocity of the induction motor. The spindle has an encoder attached thereto for detecting the position of the spindle, but the induction motor does not have a vel... | 09/29/2011 |
| 20110001452 | METHOD AND ELECTRIC CIRCUIT FOR OPERATING AN ELECTRIC MOTOR, ESPECIALLY A SERVOMOTOR, FOR A COMPONENT OF AN INTERNAL COMBUSTION ENGINE A method is described for operating an electric motor. The electric motor has at least two phases and a rotor. In the method, a current angular position (phipos) of the rotor is ascertained and, as a function of that, in at least one of the two phases, a potential is ap... | 01/06/2011 |
| 20100320956 | Energy Saving System and Method for Devices with Rotating or Reciprocating Masses A system and method are provided for reducing the energy consumed by a pump jack electric motor by reducing the supply voltage to the motor when the motor would be generating energy in open loop mode. By substantially eliminating the energy generation mode, the braking ... | 12/23/2010 |
| 20100264861 | METHOD FOR DETERMINING THE POSITION OF THE FLUX VECTOR OF A MOTOR The invention relates to a method for determining the position of a rotor flux vector of an electric motor (M), comprising a step of injecting a first current vector into a first reference frame (x+, y+) rotating at a first frequency (Ω) relative ... | 10/21/2010 |
| 20100194330 | DEVICE AND METHOD FOR CONTROLLING ALTERNATING-CURRENT MOTOR A device for controlling an alternating-current motor includes a resolver for detecting a rotational position of an alternating-current motor; and a rectangular wave voltage control unit for performing control based on an output of the resolver to provide a rectangular ... | 08/05/2010 |
| 20100102771 | ENERGY SAVER DELAY CIRCUIT FOR AC INDUCTION MOTORS A power control system for an A.C. induction motor is disclosed, comprising a voltage/current phase difference generator for determining a difference in phase between a voltage applied to the motor and a current drawn by the motor, and for generating a phase difference ... | 04/29/2010 |
| 20100060228 | BLOWER MOTOR FOR HVAC SYSTEMS A blower motor assembly having a variable speed motor that is suitable for direct, drop-in replacement in a residential HVAC (heating, ventilation, and air conditioning) system that employs a PSC motor. The blower motor assembly includes at least a neutral input and two... | 03/11/2010 |
| 20090256517 | WEIGHTED FIELD ORIENTED MOTOR CONTROL FOR A VEHICLE A system for transitioned field oriented motor control is described. The system may include a module using a current-based algorithm to estimate flux and a module using a voltage-based algorithm to estimate flux. A weighting module operates over a transition range to tr... | 10/15/2009 |
| 20090251082 | CONTROLLER FOR AC ROTARY MACHINE A controller for an AC rotary machine is proposed, by which a stable rotation angular-frequency estimate value can be obtained even in an extremely low speed region of the AC rotary machine, and consequently stable control can be performed. A controller for an AC rotary... | 10/08/2009 |
| 20090218981 | CONTROLLING SWITCHING OF THYRISTORS TO REDUCE POWER LOSS IN VARIABLE SPEED MOTOR Systems and/or methods that facilitate efficiently controlling speed of an induction motor are presented. An optimized control component controls respective switching of an auxiliary switch component associated with an auxiliary winding of the motor, a main switch compo... | 09/03/2009 |
| 20090212734 | TORQUE LIMIT OF PM MOTORS FOR FIELD-WEAKENING REGION OPERATION The invention includes a motor controller and technique for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by receiving a torque command, determining a physical torque limit based on a... | 08/27/2009 |
| 20090160394 | SENSORLESS CONTROL APPARATUS AND METHOD FOR INDUCTION MOTOR A control apparatus for an induction motor is provided and includes a rotating-speed locked loop and a feed-forward magnetizing-axis angular position emulator. The rotating-speed locked loop emulates a speed control loop of the induction motor for producing an emulated ... | 06/25/2009 |
| 20090134834 | Motor control device A motor control device includes: a motor-current detection unit; a rotational-angular-speed calculation unit for calculating a rotational angular speed of a motor; a rotational-angle-change-amount calculation unit for multiplying the rotational angular speed by a predet... | 05/28/2009 |
| 20090039825 | ABSOLUTE POSITION SENSOR FOR FIELD-ORIENTED CONTROL OF AN INDUCTION MOTOR Systems and methods are provided for an automotive drive system using an absolute position sensor for field-oriented control of an induction motor. An automotive drive system comprises an induction motor having a rotor, and a position sensor coupled to the induction mot... | 02/12/2009 |
| 20090001922 | MOTOR CONTROLLING DEVICE, MOTOR DRIVE SYSTEM, METHOD OF MOTOR CONTROL, SEMICONDUCTOR DEVICE AND ELECTRONIC DEVICE A motor control device is disclosed which is arranged so as to perform a PWM control for a permanent magnet motor including a rotor having a permanent magnet and a stator with a multiphase winding. The motor control device includes a position detection unit which execut... | 01/01/2009 |
| 20080297099 | MOTOR CONTROLLER, WASHING MACHINE, AND MOTOR CONTROL METHOD A motor controller includes an output voltage modulator that outputs sinusoidally-modulated voltage for driving a motor; a modulation factor specifier allowing specification of a modulation factor greater than 1.0 for the output voltage; a current detector that detects ... | 12/04/2008 |
| 20080278109 | System and Method for Controlling Input Line Harmonics in a Motor Drive A motor drive system is disclosed that includes a power input configured to receive alternating current (AC) power and a rectifier having a switching frequency selected to convert the AC power to direct current (DC) power. The motor drive unit also includes an input fil... | 11/13/2008 |
| 20080265830 | SYSTEMS AND METHODS FOR CONTROLLING TORQUE OF A MOTOR A system and a method for controlling torque of a motor are provided. The method includes modifying a phase advance angle based on an identified phase coil that has a faulted condition, a type of fault condition, and a polarity of a commanded torque to obtain a desired ... | 10/30/2008 |
| 20080260541 | Induction Motor Control The operation of an AC induction motor 24 is controlled in response to the actual slip exhibited by the motor during operation. The slip of the motor 24 may be determined by determining the actual running speed, n, of the motor shaft 25A, measuring ... | 10/23/2008 |
| 20080246429 | CONTROLLER OF ELECTRIC MOTOR A controller of an electric motor for improving operation efficiency in performing electric conducting control of the electric motor of an axial air-gap type is provided. Therefore, the controller of the electric motor (3) of the axi... | 10/09/2008 |
| 20080246430 | Electric vehicle drive apparatus In an electric vehicle drive apparatus having an electric motor and a motor drive device, the electric motor having a stator, a rotor and a moving mechanism capable of changing a relative distance between the stator and the rotor to vary an effective magnetic flux of th... | 10/09/2008 |
| 20080203964 | Method and device for controlling motor, and image forming apparatus A control unit controls a drive signal for determining a voltage to be supplied to the motor. A drive unit drives the motor by applying a current corresponding to the voltage determined based on the drive signal to the motor. The control unit includes a velocity detecti... | 08/28/2008 |
| 20080203963 | MOTOR CONTROLLER AND ELECTRIC POWER STEERING APPARATUS A microcomputer includes a calculating section calculating a d-axis electric current command value and a q-axis electric current command value and a signal generating section. The signal generating section generates a motor control signal through feedback control in a d... | 08/28/2008 |
| 20080191659 | Sumbersible Motor A submersible motor is provided for a submersible pump, the motor being configured as a single-phase asynchronous motor, which includes a main winding (6), an auxiliary winding (8), and a starting device (10, 14, 16, 18, 20, 22) for controlling the ... | 08/14/2008 |
| 20080157708 | Method and Apparatus for Determination of the Rotor Position of an Electric Motor The invention relates to a method for determining the angular position (theta) of a rotor (2) pertaining to an electric motor (1) and comprising a number of pairs of poles. Said method consists of the following steps: a pulse pattern (PM1, PM2 | 07/03/2008 |
| 20080143289 | Sensorless control systems and methods for 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 plurality of phase windings and a rotor that rotates relative to the stator. A ... | 06/19/2008 |
| 20080111516 | CONTROL SYSTEM FOR ROTARY ELECTRIC MACHINE WITH SALIENT STRUCTURE In a system for controlling rotation of a rotor of a multiphase rotary electric machine in relation to a stator thereof, a superimposing unit superimposes a first frequency signal on the input signal to the multiphase rotary electric machine. The first frequency signal ... | 05/15/2008 |
| 20080074103 | Method for determining the angular position of the rotor in a rotating electric machine A method is suggested for determining the angular position of the rotor in a rotating electric machine, which machine has a stator winding set with at least three stator windings, and the stator winding set is powered by a converter device. Firstly, a first voltage (U 03/27/2008 | |
| 20080061729 | METHODS TO CONTROL HIGH SPEED ELECTRIC MACHINES HAVING A FRONT-END EMI FILTER ATTACHED A system and method for extracting estimated input voltage and input current values of an AC motor based on sensed power inverter output voltage and output current when the AC motor is connected to a front-end EMI filter and the EMI filter is connected to a power invert... | 03/13/2008 |
| 20080042604 | 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 and a speed control mode. The motor drive unit includes a circuit config... | 02/21/2008 |
| 20080042614 | Motor control unit A motor control unit including a rotational position detector detecting a rotational position of a brushless DC motor; a current detector detecting a current of the brushless DC motor; a coordinate transformer executing rotational coordinate transformation of the curren... | 02/21/2008 |
| 20080018295 | Motor Drive Control Circuit and Motor Apparatus Using The Same A motor drive control circuit includes a rotation control amplifier that compares the lower of a voltage limiting reference voltage of a reference voltage source and a rotation speed control voltage, which controls the rotation speed of the motor, on a terminal with a p... | 01/24/2008 |
| 20070290650 | Motor Control Unit And Vehicle Equipped Therewith A motor unit and a vehicle equipped with the unit according to the invention includes a control unit that selects a switching frequency, that is, a carrier frequency, in accordance with a rotation speed of the motor and a torque required from a motor. When an inverter t... | 12/20/2007 |
| 20070285045 | Process for controlling torque in a calendering system A method for controlling a calendering system having a first roll having a first roll speed controller and a second roll having a second roll speed controller is disclosed. An exemplary method comprises the steps of: (a) setting the first roll at a desired process speed... | 12/13/2007 |
| 20070241718 | CONTROL DEVICE FOR AN ELECTRIC MOTOR AND RELATED METHOD There is disclosed a control device for an electric motor. The electric motor comprises at least an inductive winding, it is voltage driven and generates a back electromotive force. The device comprises first means suitable for setting periods of time each centred on th... | 10/18/2007 |
| 20070063666 | Driving device of motor An object is to provide a driving device capable of smoothly shifting from a starting state to a sensor-less vector control, in a case where the device drives a motor by the sensor-less vector control, and the device includes a voltage detecting circuit which detects an... | 03/22/2007 |
| 20070046247 | Method of rotating a polyphase motor at less than rated speed A polyphase AC induction motor is connected to a power supply through a soft starter having three sets of inverse parallel connected silicon controlled rectifiers with each set corresponding to one particular phase. Low speed starting and operation of the motor can be a... | 03/01/2007 |
| 20060232237 | Method for adjusting parameters of an electric motor and variable speed drive using such a method The invention concerns a method for adjusting motor parameters in a variable speed drive intended to control an electric induction motor M. The method includes a step for determining differences ΔID and ΔIQ between motor flux current and motor to... | 10/19/2006 |
| 20060186854 | Global closed loop control system with DV/DT control and EMI/switching loss reduction A gate driver for a power switch, comprising a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the g... | 08/24/2006 |
