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| Number | Title | Issue Date |
| 7714530 | System and method for controlling a synchronous electric motor, particularly for household appliances The system (ECS) comprises a rectifier circuit (RC) to supply a direct current voltage (VB) as output; a driver circuit (DC) which is connected to a rectifier circuit (RC) and includes a plurality of controlled switches (SW1-SW4) which can permit passa... | 05/11/2010 |
| 7710062 | Driver with a reverse-rotation preventer for an inflatable rotating exhibit A driver with a reverse-rotation preventer for an inflatable rotating exhibit is mounted inside an inflatable rotating exhibit having a transparent inflatable body and a rotating body and has a rotating assembly and a reverse-rotation preventer. The rotating assembl... | 05/04/2010 |
| 7564210 | Driver for an inflatable rotating exhibit A driver for an inflatable rotating exhibit is mounted inside an inflatable rotating exhibit having a transparent inflatable body and a rotating body and has a rotating assembly and a reverse-rotation preventer. The rotating assembly connects to and rotates the rota... | 07/21/2009 |
| 7402968 | Field winding synchronous generator-motor A field winding synchronous generator-motor includes: a power conversion section that is connected to an electric rotating machine and operating as a generator-motor, and that controls the electric rotating machine; a compensation amount storage section that stores ... | 07/22/2008 |
| 7388340 | Driving device of motor An object is to provide a driving device capable of detecting a current of a motor without any trouble even in a low rotation speed/low load state to continue a sensor-less vector control, in a case where the motor is driven by the sensor-less vector control, and th... | 06/17/2008 |
| 7358694 | Apparatus and method for determining normal start up of sensorless motor An apparatus and method determine a start-up of a sensorless motor. The apparatus includes an elapsed time determination unit, a motor velocity determination unit and an abnormal start-up determination unit. The elapsed time determination unit determines whether a p... | 04/15/2008 |
| 7339343 | Method for correcting speed feedback in a motor A method for correcting speed feedback in a drive motor by calculating the averages of speed reference and speed measurement for both downward and upward constant-speed travel and then identifying the gain and zero factors and correcting the measured speed measureme... | 03/04/2008 |
| 7292003 | Starter/generator with permanent magnet generator position indicator A motor control system for a wound field synchronous dynamoelectric machine used as an electrical starter and a generator for aeronautical engines that uses its integral auxiliary permanent magnet generator as an angular position sensor in its starting mode. ... | 11/06/2007 |
| 7262576 | Method for driving a synchronous electric motor in particular for fans A method drives a synchronous electric motor, particularly to start a fan/exhaust fan. The method includes measuring the supply voltage value of the electric motor windings being proportional to the mass flow rate. The method also includes measuring a real load angl... | 08/28/2007 |
| 7245101 | System and method for monitoring and control The invention provides for the monitoring and control of a system, such as a linear electro-mechanical transducer, e.g. a linear electric motor, particularly when driven in a reciprocating manner. A dynamic model of the linear motor and its load is used to calculate... | 07/17/2007 |
| 7211984 | Start-up and restart of interior permanent magnet machines A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based ... | 05/01/2007 |
| 7199548 | Drive control apparatus and method of alternating current motor A drive control apparatus, which controls an AC motor subjected to rotational drive by applying a rectangular wave voltage thereto, comprising: an actual torque detection section for detecting an actual torque value T outputted from the AC motor; an estimated torque... | 04/03/2007 |
| 7199547 | Apparatus, method or system for controlling mobile body In order to control the position of a mobile body without using a position detector, a magnetic pole position of a rotor of a synchronous motor is estimated based on electrical quantities in relation to electric power supplied to the synchronous motor and then the m... | 04/03/2007 |
| 7184927 | Adaptive position sensing method and apparatus for synchronous motor generator system An adaptive, sensorless position sensing apparatus (250) derives rotor position of a synchronous machine (200). The apparatus (250) comprises a first rotor position deriving unit (300) for generating first rotor position values by applyin... | 02/27/2007 |
| 7170256 | Motor control device In the control of a synchronous motor having a permanent magnet, an alternating current power supply voltage that is input to a power amplifier or a direct current link voltage of which input voltage is rectified is measured. A reactive current (a d-axis current) or... | 01/30/2007 |
| 7161323 | Motor drive apparatus, electric actuator and electric power steering apparatus The disclosure concerns a a motor drive apparatus, an electric actuator and an electric power steering apparatus capable of continuous torque control up to the high drive speed and high torque area, in order to enable quick acceleration and deceleration. A controlle... | 01/09/2007 |
| 7126514 | Inverter control device and inverter control method An inverter control microcomputer 10 comprises AD converters 21–23, a selector control circuit 31, and a selector 32. The selector 32 selects three analog signals from among inputted seven analog signals in accordance with contro... | 10/24/2006 |
| 7109670 | Motor drive with velocity-second compensation An apparatus for use with a signal generator and a motor controller includes a velocity compensator, an adjustor, and a velocity regulator. The signal generator provides a reference velocity signal, and the motor controller receives an output signal and uses the out... | 09/19/2006 |
| 7084597 | Motor control apparatus In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a control unit or application of power to it. If it is the starting pe... | 08/01/2006 |
| 7045986 | Position sensing method and apparatus for synchronous motor generator system A position sensing apparatus (300) derives rotor position of a synchronous machine (200) from signals output from the machine (200). In one embodiment, the position sensing apparatus (300) comprises: a bandpass filter (322) that fi... | 05/16/2006 |
| 6967461 | North-south pole determination for carrier injection sensorless position sensing systems A system for enhancing the performance of a carrier insertion sensorless (CIS) position sensing system for a wound field synchronous machine that utilises the positively rotating components (+2ωct) of the carrier second harmonic currents that contain rot... | 11/22/2005 |
| 6954050 | Control method and control device of permanent-magnet type synchronous motor The object of the invention is to inhibit the axial displacement caused by the insufficiency of a control response angular frequency of a frequency arithmetic unit of a synchronous motor and realize high-precision torque control also in acceleration/deceleration. To... | 10/11/2005 |
| 6927551 | Motor control apparatus and motor control method A 3-phase AC current flowing to a 3-phase synchronous motor is converted through coordinate conversion to a d-axis current id and a q-axis current iq in a dq-axis coordinate system which rotates in synchronization with the motor rotation and a phase δ of a rectangu... | 08/09/2005 |
| 6914399 | Active deadtime control for improved torque ripple performance in electric machines A method for implementing active deadtime control of an inverter associated with an electric motor is disclosed. In an exemplary embodiment, the method includes receiving a command voltage signal indicative of a desired load to be driven by the motor. Based upon the... | 07/05/2005 |
| 6900613 | Motor control apparatus A motor control apparatus includes a phase current detecting section for detecting phase currents to a motor, a current phase/current peak value calculating section for calculating a current phase based on the phase currents, a voltage phase setting section for addi... | 05/31/2005 |
| 6891348 | Synchronous motor with currents controlled by a single Hall sensor at high speeds Electric motor for driving members that rotate at speeds of greater than 40,000 revolutions per minute, includes a stator housing induction coils, a rotor supporting multiple permanent magnets and located coaxially inside the stator, and multiple Hall sensors integr... | 05/10/2005 |
| 6876170 | Controller A controller monitoring an operating state and performing a suitable process when detecting a magnetic pole position by means of a sensor for detecting a position and velocity of a movable part (rotor or movable member) of a synchronous motor. If tandem control is n... | 04/05/2005 |
| 6856114 | System for measuring motor rotor position The present invention relates to a method for the sensorless electric measurement of the position of a rotor of a permanently excited synchronous machine that is fed by a converter, by means of measuring signals which are sent to an evaluation device that calculates... | 02/15/2005 |
| 6822416 | Device for monitoring the measuring system of an electric drive A device for monitoring a measuring system of an electric drive is described, including a measuring system (12) for detecting at least one measured quantity of an electric drive (10), at least one controller (78) which receives at least the meas... | 11/23/2004 |
| 6803739 | Method and apparatus for controlling synchronous motor A method and apparatus of controlling a synchronous motor having a rotor, and a stator which produces a magnetic flux for rotating the rotor about an axis thereof, the method including the steps of detecting an angular position and a rotating speed of the rotor; est... | 10/12/2004 |
| 6803735 | Speed-based open-loop start-up method for brushless DC motor A method of starting a brushless DC motor 12 at any initial speed (A) establishes a initial stator-field speed and setting a counter of synchronization, (B) measures a speed of a rotor of the motor, (C) compares the speed of the rotor with the stator-field sp... | 10/12/2004 |
| 6801012 | Sensorless control of switched reluctance electric machines A system and methodology for control of a switched reluctance electric machine comprising: a switched reluctance electric machine including a sensor generating and transmitting a sensor signal indicative of an operating characteristic; a controller operatively coupl... | 10/05/2004 |
| 6774599 | Servo actuator and position sensor In an actuator having an integrated drive circuit, a switching current flowing in a coil within the actuator is included in a position sensor signal of the actuator. According to the present invention, by arranging a detection circuit which performs sampling in sync... | 08/10/2004 |
| 6771039 | Motor control apparatus and method A motor control apparatus includes an inverter for applying voltage to a synchronous motor and a control apparatus 4 for calculating a voltage instruction value to be applied by a PWM signal. There are provided a current difference sensing unit of the synchronous mo... | 08/03/2004 |
| 6696812 | Control apparatus for electric motor A control apparatus controls a voltage applied to an AC motor from a power converter with a PWM signal, and has two different magnetic pole position-estimating units which estimate a rotor magnetic pole position of the AC motor, and has a switching unit w... | 02/24/2004 |
| 6686715 | Motor control device The present invention provides a motor control device, which comprises a signal control circuit having an input pin to output different motor drive signals according to input electronic signals. The signal control circuit is also protected for over curren... | 02/03/2004 |
| 6674261 | Motor control apparatus A sensorless detector 25 uses a rotor angle finally detected by a sensor interpolation detector 24 as an estimated value (θ ) of the rotor angle of a motor 3 in a first control cycle upon changing from a rotor angle detecting process carried out by the s... | 01/06/2004 |
| 6646408 | Method for controlling operating of switched reluctance motor (SRM) A method for controlling driving of a Switched Reluctance Motor (SRM) is capable of operating the SRM normally according to a phase under the normal state in case a noise is inputted to a position sensor in the SRM. In order to achieve the advantage, the ... | 11/11/2003 |
| 6646409 | Apparatus for controlling rotation speed of motor An apparatus for controlling the rotation speed of a motor, which is capable of controlling the rotation speed and the torque of the motor by detecting the input voltage and the input current of the motor without using a sensor for detecting the position ... | 11/11/2003 |
| 6605917 | Method and a device for controlling and regulating an alternating current rotating electrical machine, in particular a synchronous alternating current rotating electrical machine A method of regulating a rotating electrical machine includes a preparatory step of determining a discrete voltage control law for the machine. The discrete control voltage to be applied at each sampling time is determined in the form of a first term corr... | 08/12/2003 |
