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| Number | Title | Issue Date |
| 8179083 | Starting device for electric motors Starting device for electric motors provides a circuit including: a first branch connected at one end to a common point and at the opposite end to the start winding of the motor, whereon a starting capacitor, a resistor and fixed contacts of a relay are inserted in ... | 05/15/2012 |
| 8179082 | Soft starting method and system thereof in the way of wave-skipping with stepped frequency and stepless voltage regulating for a motor The invention relates to a soft starting method and system thereof in the way of wave-skipping with stepped frequency and stepless voltage regulating for a motor which can be applied to the large torque starting of AC motor under the condition of a power supply of a... | 05/15/2012 |
| 8093846 | Motor drive device In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis comparator compares the first sinusoidal signal and the second sinusoidal sign... | 01/10/2012 |
| 8089240 | 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 at an arbitrary angle can be aligned to an accurate initial position. ... | 01/03/2012 |
| 8054030 | Permanent magnet AC motor systems and control algorithm restart methods Permanent magnet alternating current (PMAC) motor systems and methods for starting or restarting PMAC motor system sensorless control algorithms are provided. One system includes a PMAC motor including a rotor, an inverter, and a controller. The controller includes ... | 11/08/2011 |
| 7948193 | Single phase AC synchronous motor An inexpensive, productivity-enhanced single-phase AC synchronous motor in which stabilized synchronous pull-in can be carried out by suppressing generation of counter torque during a starting operation. Starting operation is performed while the energizing range of ... | 05/24/2011 |
| 7948203 | Device for the control of a smooth starting or ending of a three phase current motor, so-called soft starter An arrangement for the control of a soft starting or stopping of a three phase current motors (1), a so-called soft starter, is furnished for starting of heavy mechanical, electrical, or hydraulic drives. In order to obtain a space savings with individual or ... | 05/24/2011 |
| 7948202 | Starting circuit for single-phase AC motor A starting circuit for a single-phase AC motor, comprising a main winding, a detecting circuit, a rectifying and filtering circuit, a triggering circuit, a switching circuit and a starting winding. The detecting circuit is connected in series to the main winding for... | 05/24/2011 |
| 7928685 | Method of manufacturing a starting device for a three phase electric motor, and a starting device When manufacturing a starting device for a three-phase electric motor, especially a soft starter, in at least one embodiment an arc quenching system is at least partly removed from a commercially available contactor that so becomes to a modified contactor. In at lea... | 04/19/2011 |
| 7919947 | Method and device for starting an electric machine with a magnetically mounted rotor A method and a device with a control apparatus (50) for starting an electric machine (10) with a rotor (20), particularly the spinning cup of an open-end spinning machine, magnetically mounted by a bearing having permanent magnets (31, 32, 33... | 04/05/2011 |
| 7915843 | Motor drive device, method, and cooling device using the same In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis comparator compares the first sinusoidal signal and the second sinusoidal sign... | 03/29/2011 |
| 7902789 | Method and system for detecting the cabling errors between a starter and an electric motor A method and a system for controlling an asynchronous electric motor for detecting cabling errors between the electric motor and a motor starter. The electric motor including three windings distributed over three branches in a delta configuration and controlled by t... | 03/08/2011 |
| 7868580 | Method for turning a three-phase current motor on again and electrical circuit for implementing the method A method for turning a three-phase alternating current motor on again, after it has been separated from a supply voltage, if a residual field voltage induced by a rotor residual field is present, and to an electrical circuit for implementing the method. The time pro... | 01/11/2011 |
| 7852039 | Control apparatus for AC rotary machine A control apparatus is for controlling an AC rotary machine which includes a first and second stator elements and a rotor, in which the first stator element can be turned, or offset, in a circumferential direction relative to the second stator element. The control a... | 12/14/2010 |
| 7821222 | Submersible 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 ... | 10/26/2010 |
| 7791307 | AC motor controller A system, method, and device for monitoring an AC induction motor are disclosed. The exemplary system provides the architecture of an intelligent motor controller. On one hand, the controller has self-commission and adaptive tuning capability and can provide smooth ... | 09/07/2010 |
| 7755318 | Soft-start/stop sump pump controller A sump pump control includes a microprocessor that sends a trigger pulse to an alternistor to turn the alternistor on and connect the sump pump to an NC power source. The microprocessor also monitors the power source to find a positive/negative crossover point. The ... | 07/13/2010 |
| 7675260 | Motor driving apparatus In a motor driving apparatus, a control unit detects a rotation frequency of a motor to be driven and generates a control voltage Vcnt in a manner such that the rotation frequency thereof is brought close to a desired rotation frequency. A clamping circuit sets an u... | 03/09/2010 |
| 7652447 | Power capacitors for AC motors mounted diametrically on associated transmissions Power capacitors for AC motors are mounted diametrically on associated transmissions. The power capacitors are in one embodiment annular and in another embodiment, arcuate. By having power capacitors mounted on transmission housings diametrically, cooling of the pow... | 01/26/2010 |
| 7638967 | Motor control unit A motor control unit includes a power converter unit that energize a motor based on a commutating signal, the motor having a rotor provided with a permanent magnet and a stator having a coil wound thereto; a start-up controller that outputs a commutating signal to t... | 12/29/2009 |
| 7633260 | Apparatus and method for starting and stopping an AC induction motor An apparatus for controlling the starting and stopping of an AC induction motor, the apparatus comprises a first and a second magnetic permeable portions having a plurality of legs wherein a magnetic control flux of the second magnetic has an opposite magnetic polar... | 12/15/2009 |
| 7592771 | Method for operating a two-phase rotary current controller A method is disclosed for operating a two-phase rotary current controller. In order to optimize the operation of a two-phase rotary current controller, magnitudes of a parameter that can be varied in both controllable phases of a two-phase rotary current controller ... | 09/22/2009 |
| 7592761 | System and method for starting and operating a motor A method for determining an initial position of a rotor of a polyphase motor is described. The method comprises determining current change values from a plurality of phases of the motor during saturation of the motor relating to the initial position of the rotor; id... | 09/22/2009 |
| 7560895 | Indirect rotor resistance estimation system and method Indirect rotor resistance estimation for an AC induction motor is achieved by successively stepping the quadrature command to zero and the direct current command to a predetermined value causing the quadrature stator voltage to decay as a representation of rotor cur... | 07/14/2009 |
| 7531983 | Method of controlling startup current of motor and disk drive using the method Provided is a method and apparatus for controlling a motor of a disk drive. The method is used to stably control the startup current of a motor by considering a voltage drop and the disk drive uses the method. The method includes managing power-on reset retry inform... | 05/12/2009 |
| 7511446 | System and method for starting a wound rotor motor A system and method for starting and regulating a wound rotor motor (320) including a phase-controlled SCR converter (350) and a drive circuit (330, 340) having a voltage source inverter (340) and a voltage source converter (330). ... | 03/31/2009 |
| 7501785 | Starting system for a single-phase induction motor A starting system for a single-phase induction motor, comprising: a stator having a running coil (11) and a starting coil (12); a power source (F) which supplies current to said running coil (11) and said starting coil (12); a running swi... | 03/10/2009 |
| 7498763 | Apparatus and method for reducing the current drawn during starting of a single-phase AC asynchronous motor Current consumption during the starting process of a single-phase a.c. asynchronous motor is reduced by an apparatus including a thermistor which can be mounted in series with the main winding of the motor. A starting capacitor can be mounted in series with an auxil... | 03/03/2009 |
| 7498762 | Motor A motor includes a drive circuit for driving a rotor by controlling a current applied to an armature winding of a stator, and a capacitor for smoothing a voltage supplied to the armature winding and/or a capacitor for smoothing a supply voltage from outside on a sam... | 03/03/2009 |
| 7459877 | Solid state reversing AC motor starter with DC power source A solid state reversing AC motor starter that employs a DC power source and a power bridge employing insulated gate bipolar transistors that provide an ungrounded three phase AC output. The AC output is connected to the power input of the motor starter, which requir... | 12/02/2008 |
| 7408321 | Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit, a starting capacitor and a resistive element Apparatus for driving a three-phase compressor assembly from a single-phase electrical power supply having first and second power lines, said three-phase compressor assembly comprising a compressor having a rotatable shaft, an electrical motor having a rotatable sha... | 08/05/2008 |
| 7405533 | Method and control circuit for controlling phase splitting start single-phase induction motor After a power source is turned on, the motor stars by feeding a current to the auxiliary wiring for a first predetermined period. Then, a voltage induced in the auxiliary wiring is detected. Whether or not the detected inducted voltage is lower than a predetermined ... | 07/29/2008 |
| 7402976 | Apparatus and method for controlling operation of compressor An apparatus for controlling an operation of a compressor includes a controller for generating a control signal for selecting an operation mode of a compressor according to an operation load of the compressor; a first switching unit connected to a motor consisting o... | 07/22/2008 |
| 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 apparatus, in the case that a vehicle speed is high, the same field weakeni... | 07/01/2008 |
| 7353662 | Medium voltage starter for a chiller unit A single medium voltage starter box is mounted on a chiller unit with the other components of the chiller system. The starter box can be positioned on the chiller system unit to permit the starter box to be close coupled to the motor, and specifically to the main mo... | 04/08/2008 |
| 7345449 | 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 ... | 03/18/2008 |
| 7345439 | Rotary electric machine for vehicle [Problem] In a conventional rotating electrical machine to perform starting and power generation, an inverter and a rotating electrical machine body are constructed to be separate bodies, and a three-phase harness is provided between the rotating electrical machine ... | 03/18/2008 |
| 7342371 | System and method for detecting motor run condition A motor control system for detecting motor run condition comprises power switches for connection to an AC line for controlling application of AC power to the motor. An input receives a motor start command. A controller is connected to the input and controls operatio... | 03/11/2008 |
| 7330011 | Motor driving apparatus A motor driving apparatus includes an inverter circuit for converting an output of a rectifier circuit connected to a single-phase AC power supply into a driving voltage, and outputting the driving voltage to a brushless motor, and an inverter control unit for contr... | 02/12/2008 |
| 7317264 | Method and apparatus to independently control contactors in a multiple contactor configuration A method and apparatus to independently control the closing or making of contactors in a modular contactor assembly is disclosed. The apparatus includes a contactor assembly having multiple contactors such that each contactor is separately controlled such that one c... | 01/08/2008 |
