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| Number | Title | Issue Date |
| 8188702 | Rotating electrical machine control system and vehicle drive system A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for supplying electric power to the rotating electrical machine, and that conver... | 05/29/2012 |
| 8154241 | In-vehicle electronic control apparatus and steering control system An electric power steering system includes a multi-phase electric motor, an inverter connected to the rotary electric machine and an electronic control apparatus. One phase of the motor is pulled up by a resistor. The electronic control apparatus detects disconnecti... | 04/10/2012 |
| 8143837 | Inverter control apparatus An inverter control apparatus includes: a state estimator that calculates an estimated current vector and an estimated magnetic flux vector from a motor command voltage vector, a detected current vector, and a motor parameter; a correction voltage calculator that ca... | 03/27/2012 |
| 8129936 | Open-loop and/or closed-loop control system of a 3-phase power converter for the operation of an asynchronous machine An open-loop and/or closed-loop control device for operating an asynchronous machine which is fed by a 3-phase power converter. The open-loop and/or closed-loop control structure has a stator flux controller and a pulse pattern generator for generating pulse signals... | 03/06/2012 |
| 8125178 | Drive and method A drive and a method, including an electric motor, which is supplied by a rectifier, the rectifier including a time-discrete closed-loop control structure, which regulates the stator current of the electric motor by setting the voltage applied at the motor, the curr... | 02/28/2012 |
| 8076898 | Method of brushless DC motor control and its application The invention relates to electric engineering, in particular to methods for controlling an ac electronic motor. The inventive control method consists in starting and rotating a rotor upon EMF signals in current-free sections of an armature winding, in converting the... | 12/13/2011 |
| 8030878 | Motor driving device having power failure detection function A motor driving device that accurately achieves power failure detection according to a power failure tolerance with a relatively simple configuration. A counter input computing unit determines, as a counter input value, a value that is inversely proportional to the ... | 10/04/2011 |
| 8022658 | Motor control system including electrical insulation deterioration detecting system A motor control system of the present invention includes an accurate electrical insulation deterioration detecting system. A voltage divider circuit is arranged between a negative DC output portion and a ground, through a normally open switch circuit. A detecting op... | 09/20/2011 |
| 7990099 | Power converting device for electric train A power converting device for an electric train includes a power converter, an alternating-current motor, a primary control unit, and a control unit. The power converter converts direct-current power into alternating-current power. The alternating-current motor is d... | 08/02/2011 |
| 7960938 | Method and apparatus for determining motor rotation status A motor drive unit includes a voltage inverter, a controller, and reconnect logic. The voltage inverter provides motor drive signals to an associated motor. The controller is operable to generate demand signals for at least two control axes for controlling the volta... | 06/14/2011 |
| 7932693 | System and method of controlling power to a non-motor load A motor drive for conditioning power to be delivered to a non-motor load includes a voltage feedback circuit that monitors a DC bus voltage and, based on changes in the DC bus voltage, adjusts a power conditioning scheme such that near steady-state load conditions a... | 04/26/2011 |
| 7723944 | Vector control device of induction motor, vector control method of induction motor, and drive control device of induction motor The vector control device includes: secondary magnetic flux command computing means (40) for computing a secondary magnetic flux command to an induction motor (6) by taking a maximum voltage that an inverter (4) can generate into account on a ba... | 05/25/2010 |
| 7696715 | Power control for induction motors using variable frequency AC power An autonomous controller allows an AC induction motor to operate over a broad range of AC power supply frequencies by reducing the amount of current supplied to the motor at lower frequencies. The controller detects the frequency of the power supply and switches the... | 04/13/2010 |
| 7671558 | Induction motor controller The present invention provides an induction motor controller which includes: a circuit for generating a d-axis current reference signal from a d-axis current command value and a periodically varying periodic signal; a d-axis current controller for controlling a d-ax... | 03/02/2010 |
| 7656117 | System and method for precharging passive harmonic filters A system and method for precharging a harmonic filter connected to a power supply line to receive AC power and deliver the AC power to the motor drive unit includes a control circuit. The control circuit is configured to monitor an operational state of the motor dri... | 02/02/2010 |
| 7635963 | Dual motor drive system, control device for the same, and motor to be used in the same An inverter having M×N arms is connected to a first motor having N groups of M phase coils and a second motor having M groups of N phase coils. At least one of the first motor and the second motor has as many teeth as the number of phases of the motor multiplied by... | 12/22/2009 |
| 7501787 | Method for controlling AC motor An inverter that supplies a desired primary voltage (v1) to an induction motor, a current detector that detects a primary current (i1) from the inverter to the induction motor, a voltage designation value calculating unit that generates a volta... | 03/10/2009 |
| 7468595 | System and method of controlling the start-up of an adjustable speed motor drive based sinusoidal output power conditioner A motor drive for conditioning power to be delivered to a load includes a current feedback circuit that monitors current being fed to a transformer connected between the motor drive and the load. Based on the total current input to the transformer, a controller adju... | 12/23/2008 |
| 7432683 | PWM pattern sequence to reduce losses in voltage source inverters A method for controlling an inverter uses sequences of predetermined states where each state uniquely corresponding to a set of control signals provided to the inverter that is coupled to a motor. The method includes repeatedly applying a first center null timing se... | 10/07/2008 |
| 7423406 | Power control of an induction machine Regulation of the active and reactive power of an induction machine in a coordinate system fixed on the winding, wherein a first regulator output variable is generated using a first regulator as a function of a setpoint variable deviation of the active power and a s... | 09/09/2008 |
| 7420351 | Power-factor correction device for variable speed drive A variable speed drive for a three-phase electric motor, including a rectifier module supplying a rectified voltage from a single-phase alternating current network, a voltage step-up module supplying a regulated bus voltage, and an inverter module supplying a contro... | 09/02/2008 |
| 7411370 | Vector controller of induction motor Provided is a vector control apparatus for an induction motor which is capable of obtaining stable rotation in a short period of time for adjustment even at the time of low-speed operation by increasing the SN ratio of an output voltage to suppress the arithmetic er... | 08/12/2008 |
| 7408319 | System and method for regenerative energy control when multiple motors share a common power supply When multiple motors (40) share a common DC power supply (10) via a bus (20), a system and method is provided for managing the effect of regenerative energy caused by a motor. The regenerative energy may be sensed, e.g., by a power electronics c... | 08/05/2008 |
| 7403404 | Power inverter system and method of correcting supply voltage of the same In a power inverter system, an inverter unit includes first to third single-phase inverters. In the power inverter system, a reference-frequency calculating unit calculates a reference frequency of each of the first to third single-phase inverters. A reference-volta... | 07/22/2008 |
| 7365511 | 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 in... | 04/29/2008 |
| 7348740 | Motor control circuit for forward/reverse rotation A motor control circuit for forward/reverse rotation comprises a driving circuit, a switching circuit and a motor coil winding. The driving circuit has a driving source, a Hall IC and a driving IC. The driving source provides a signal to enable the Hall IC to output... | 03/25/2008 |
| 7339333 | Motor drive control apparatus, motor drive control method and program of the same A general-purpose comparator can be used as a comparison processing module to reduce the costs of a motor drive control apparatus. The apparatus has an electric machine; a magnetic pole position computation processing module; a pattern generation processing module; ... | 03/04/2008 |
| 7340158 | Method and circuit configuration for controlling a polyphase brushless electric motor A method is specified for controlling a polyphase brushless electric motor, wherein the motor phase currents which are associated with the phases are produced by clocked variation of the respectively applied electrical potential. In this case, the motor phase curren... | 03/04/2008 |
| 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 |
| 7319652 | Controlling optical pickup of optical disk drive by detecting change of sampling signals taken from a motor drive signal A drive current or a drive voltage is controlled corresponding to change of load by sampling the drive current or drive voltage of a motor to move an optical pickup and then detecting change of the sampling signal as change of the optical pickup when it is moved. Mo... | 01/15/2008 |
| 7317295 | Electric motor driving system, electric four-wheel drive vehicle, and hybrid vehicle An electric four-wheel drive vehicle includes: an internal combustion engine; a generator for outputting DC electrical power; an inverter for converting DC electrical power, output from the generator, into AC electrical power; and an AC electric motor, which is driv... | 01/08/2008 |
| 7312590 | Model railroad velocity controller Control over velocity of a model train may be determined based upon the speed of rotation of a control knob. A processor receives electronic pulses indicating rotation of the knob beyond a predetermined increment of angular distance. The processor calculates the amo... | 12/25/2007 |
| 7304400 | Power generating system and its control method A power controller 5 calculates the induced voltage or rotor magnetic flux from the output voltage and the output current of a generator 3, estimates a shaft speed of the generator 3 from the phase of the induced voltage or the phase of the roto... | 12/04/2007 |
| 7304451 | Motor control apparatus and method for generating modulation wave instruction of PWM inverter of the same motor control apparatus A motor control apparatus capable of expanding a voltage output and a modulating wave signal generating method for a PWM inverter apparatus of the motor control apparatus, which is controlled by a pulse width modulating signal obtained by comparing a modulating wave... | 12/04/2007 |
| 7292004 | Motor driving apparatus A motor driving apparatus for driving a motor includes a single-phase rectifier circuit having an input connected to a single-phase AC power supply, an inverter circuit that is connected to the single-phase rectifier circuit and applies a current and a voltage to th... | 11/06/2007 |
| 7292009 | Hybrid type working machine Simplifying the controller of hybrid type drive unit. The output of a generator driven by engine is connected directly to a motor 7 through a converter or switching circuit 10 without being charged on any battery. The output of each phase of the genera... | 11/06/2007 |
| 7279865 | Method and apparatus for monitoring motor status using induced motor voltage A motor drive unit includes a controller, a voltage inverter, and a speed estimator. The controller is operable to generate at least one command signal for controlling a motor associated with the motor drive unit. The voltage inverter is operable to generate motor d... | 10/09/2007 |
| 7271500 | Electrical rotating machine control unit and power generation system Because of the necessity of resolver for detecting a rotating position, which is very expensive, and noise suppression of the rotating position signal line on a doubly-fed machine, cost increase of the generator and reduced reliability due to possible failures are i... | 09/18/2007 |
| 7271557 | AC motor driving apparatus and method of controlling the same The AC motor driving apparatus comprises an inverter for supplying power to an AC motor, current sensors for detecting current that flows in the motor or inverter, a rotation sensor for detecting the rotation of the rotor in the motor, and a control unit for control... | 09/18/2007 |
| 7271562 | Method and device for controlling startup of motor Disclosed is a method and device for controlling the startup of a synchronous reluctance motor. The device includes: a voltage injector which generates injection voltages to estimate an initial position of the rotor; a motor drive voltage generator which converts st... | 09/18/2007 |
