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| Number | Title | Issue Date |
| 8115431 | Inverter control apparatus and motor drive system An inverter control apparatus that controls a three-phase inverter which transforms a direct-current voltage into an alternating three-phase voltage, the inverter control apparatus includes: a voltage command vector generation portion that generates a first voltage ... | 02/14/2012 |
| 8098032 | Control system for multiphase rotary machines A control system is designed to use a plurality of voltage vectors expressing a switching mode for a switching circuit to thereby control a difference between a current actually flowing through a multiphase rotary machine and a command current value therefor within ... | 01/17/2012 |
| 8035331 | AC/DC converting circuit and motor controller using the same An AC/DC converting circuit, has a full-bridge rectifier having two input terminals and two output terminals, a first capacitor, a second capacitor, an electronic switch having a control terminal, a trigger circuit having an input terminal and an output terminal, an... | 10/11/2011 |
| 7999497 | Device for controlling polyphase rotating machine A device for controlling a polyphase rotating machine comprising a stator, a rotor, and sensors, the device being capable of receiving at least one first sensing signal (V, W, U) representing a position of the rotor relative to the stator and outputted from a first ... | 08/16/2011 |
| 7923953 | Linearity for field weakening in an interior permanent magnet machine Systems and methods are disclosed to provide torque linearity in the field-weakening region for an electric (e.g., IPM) machine. The systems and methods implement a field weakening and a torque linearity control loop for linearizing torque generated by an electric m... | 04/12/2011 |
| 7880425 | Electric motor drive systems, motor vehicles, and methods of phase current regulation In various embodiments, an electric motor drive system (400, FIG. 4) and a motor vehicle (1000, FIG. 10) include an inverter (404, FIG. 4) adapted to generate (604, FIG. 6), based on inverter control inputs, a ... | 02/01/2011 |
| 7759886 | Linearity for field weakening in an interior permanent magnet machine Systems and methods are disclosed to provide torque linearity in the field-weakening region for an IPM machine. The systems and methods adjust the q-axis and the d-axis components of the stator current commands of the IPM machine using a flux weakening and a torque ... | 07/20/2010 |
| 7746024 | Electric engine start system with active rectifier A power converter includes a PWM active rectifier and controller that minimize harmonic ripple currents on the DC link during an engine start mode (first stage) in which power is provided to an AC starter motor. The PWM active rectifier and controller also minimize ... | 06/29/2010 |
| 7570008 | Power module, power converter, and electric machine system for mounting in vehicle The present invention provides a power module, power converter, and vehicular electric machine system capable of reducing inductance of a peripheral section of an output terminal in a power module, and additionally, reducing a surge voltage. A positive emitter condu... | 08/04/2009 |
| 7443127 | Apparatus and method for motor control using table In an apparatus of controlling a motor in a battery vehicle, a current command generation section has a table, and generates an exciting command current and a torque command current by referring to the table based on a torque command. A converting section generates ... | 10/28/2008 |
| 7440261 | Power regulator with a bypass and splice capability A power regulator with a bypass and splice capacity includes at least one phase member and a driver. Each one of the at least one phase member includes two cooling fins, two SCR thyristors, a conductive resilient tab and a conductive rigid tab. The cooling fins are ... | 10/21/2008 |
| 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 |
| 7352598 | Inverter units with duty cycle control based on the detected, high and low output voltage An inverter unit includes a DC power source, an inverter circuit having two or more pairs of switching elements which are connected in parallel to the DC power source, so that a DC voltage of the DC power source is converted into a pulse train-like, pseudo-AC voltag... | 04/01/2008 |
| 7348739 | Motor driving apparatus A motor driving apparatus makes a carrier signal of an inverter be synchronized with a carrier signal of a DC/DC converter, and determines a phase difference between both the carrier signals based on a ratio of an input voltage inputted to the DC/DC converter and an... | 03/25/2008 |
| 7342378 | System and method for driving synchronous motor A driving apparatus of a synchronous motor fixes all the switching devices of an inverter at OFF in accordance with a value of an all-OFF control pulse signal outputted by a pulse generator. A motor current keeps flowing through free wheel diodes for a predetermined... | 03/11/2008 |
| 7339344 | Self tuning method and apparatus for permanent magnet sensorless control A plurality of parameters of a Permanent Magnet Synchronous Motor (PMSM) is determined by a motor controller for differentiating between a plurality of PMSMs. This is achieved by first applying regulated DC motor currents at a commanded fixed rotor angle and measuri... | 03/04/2008 |
| 7339334 | Real-time responsive motor control system The present invention discloses a real-time responsive motor control system comprising a central MCU (Microcontroller Unit) core logic and at least one PWM (Pulse Width Modulation) MCU core logic. The central MCU core logic takes care of all interrupt events. The PW... | 03/04/2008 |
| 7334854 | Sensorless start-up method for driving a brushless DC motor At first, a plurality of detection modes are applied in sequence to a brushless DC motor, such that with respect to each of the detection modes a composite magnetic field generated by a motor current flowing through motor coils points in a different direction. Then,... | 02/26/2008 |
| 7323840 | Magnetic-pole detecting system for synchronous AC motor and magnetic-pole detecting method therefor A magnetic-pole detecting system for synchronous AC motors and a magnetic-pole detecting method therefor are provided. The magnetic-pole detecting system for synchronous AC motors includes a position detector 10 for detecting the relative position between the... | 01/29/2008 |
| 7323839 | Direct current motor controlling method A direct current motor controlling method includes a mean for transforming a duty signal to computed value by a microprocessor unit. The microprocessor unit computes the computed value and then produces a target value by executing a dichotomy method, a rotation meth... | 01/29/2008 |
| 7317998 | Method for the calculation and the assessment of the frequency spectrum of a matrix converter A method for the calculation of an output spectrum of a matrix converter in which m phases of a generator as an input are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix with n (n | 01/08/2008 |
| 7311300 | Actuator drive control device for active vibration isolation support system, and method of using the same An actuator of an active engine vibration isolation support system is driven based on the first, second, third . . . duty groups calculated corresponding to the vibration periods t1, t2, t3 . . . of the engine. When the engine rotational speed v... | 12/25/2007 |
| 7304835 | Mainframe and power supply arrangement A mainframe and power supply arrangement is disclosed to include a mainframe, which has a base frame holding a DC power jack and connector modules, a circuit module, which includes a sliding carrier detachably slidably inserted into the base frame and a circuit boar... | 12/04/2007 |
| 7248478 | Coolant cooled type semiconductor device A semiconductor device includes a cooling unit in which coolant flows, a semiconductor chip having two main surfaces press-pinched by the cooling unit, and an electronic member different from the semiconductor chip. The electronic member is located to contact the co... | 07/24/2007 |
| 7242163 | System and method for clamp current regulation in field-weakening operation of permanent magnet (PM) machines A device to regulate current produced by a permanent magnet machine responsive to a plurality of phase current signals. The motor produces torque for application on a shaft. A processing and drive circuit responsive to a direct current command signal and a quadratur... | 07/10/2007 |
| 7230403 | System and method for elimination of DC offset feedback in AC drives A DC offset compensation system and method significantly reduce a DC offset voltage in the voltage feedback loop of an AC motor drive control system. A control voltage error signal is demodulated and filtered and applied to the closed loop voltage feedback signals t... | 06/12/2007 |
| 7224133 | Control apparatus, dual chip inverter and single chip inverter of AC motors A control apparatus and a semiconductor apparatus of AC motors capable of reducing torque ripple with a comparatively simple circuit corresponding to a high withstand voltage and capable of driving a motor at high efficiency even when the rotational speed or load ha... | 05/29/2007 |
| 7218071 | Method and apparatus for increasing AC motor torque output at low frequency Methods and apparatus are provided for controlling AC motor torque output. The method comprises the steps of producing a current based on a first comparison of a fundamental output frequency of the AC motor with a predetermined frequency and a second comparison of a... | 05/15/2007 |
| 7212407 | Electrical power converter method and system employing multiple output converters A support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support, in conjunction with other packaging features may form a shield from both external EMI/RFI ... | 05/01/2007 |
| 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 |
| 7208908 | Apparatus and method to control torque and voltage of an AC machine A method of controlling a power converter (258) of a synchronous machine drive system (100) determines position and speed of a rotor (350) of the synchronous machine (300); regulates a current vector relative to a reference frame, having ... | 04/24/2007 |
| 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 |
| 7193378 | Wye switch inverter for electric and hybrid vehicles A circuit for controlling a multi-phase machine having a stator with stator windings includes a controller, primary commutation switch pairs, a neutral terminal, and commutation control switches. Each switch pair includes first and second primary commutation switche... | 03/20/2007 |
| 7190130 | Electric motor pole position sensing method, pole position sensing apparatus, and electric motor control apparatus using the same It is an object of the invention to provide a method which can detect a magnetic pole position easily and surely by using high-frequency currents such as harmonics of an inverter output and carrier frequency components. The invention provides a method of detecting a... | 03/13/2007 |
| 7187548 | Power converter having improved fluid cooling A thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support, which may be controlled in a closed-loop manner. Interfacing between circuits, circuit mounting... | 03/06/2007 |
| 7187568 | Power converter having improved terminal structure A terminal structure for power electronics circuits reduces the need for a DC bus and thereby the incidence of parasitic inductance. The structure is secured to a support that may receive one or more power electronic circuits. The support may aid in removing heat fr... | 03/06/2007 |
| 7187152 | AC servo drive without current sensor An AC servo drive without current sensor includes a PI (proportional integration) controller, at least two first-order controllers (polar point and zero point), a decoupling compensator, a coordinate converter, a pulse width modulator, a counter and a speed estimato... | 03/06/2007 |
| 7180263 | Synchronous motor control method and device Synchronous motor controlling apparatus and method controls power applied to minimize or eliminate speed variations of a synchronous motor due to variations in load imposed the motor. The rotational position of a rotor of the synchronous motor based on the input ter... | 02/20/2007 |
| 7180726 | Self-supporting capacitor structure A plurality of high capacitance capacitors are coupled to supply or accept large currents. Bus bars are welded to the capacitors to provide improved thermal performance as well as self-supporting rigidity to the geometrical structure formed by the capacitors and the... | 02/20/2007 |
| 7177153 | Vehicle drive module having improved cooling configuration An electric vehicle drive includes a thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. Power electronic circuits are thermally matched, such as bet... | 02/13/2007 |
