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| Number | Title | Issue Date |
| 8179068 | Variable-flux motor drive system A variable-flux motor drive system including a permanent-magnet motor including a permanent magnet, an inverter to drive the permanent-magnet motor, and a magnetize device to pass a magnetizing current for controlling flux of the permanent magnet. The permanent magn... | 05/15/2012 |
| 8174224 | Torque production in an electric motor in response to current sensor error Methods and systems are provided for producing a commanded torque in an electric motor in a vehicle. A method comprises obtaining a torque command, obtaining a speed of the electric motor, and operating the inverter based at least in part on a voltage command that c... | 05/08/2012 |
| 8169173 | Method for controlling a vehicle drive unit A method for controlling a vehicle drive unit, the vehicle drive unit having at least two individual motors. A total actual torque is continuously compared with an allowable total torque, the total actual torque being calculated from individual actual torque values ... | 05/01/2012 |
| 8164289 | Brushless motor and control method of brushless motor In a brushless motor having a stator including armature windings for a plurality of phases, and a rotor including a permanent magnet and being rotatably disposed inside or outside of the stator, an inter-phase induced voltage waveform between two different phases in... | 04/24/2012 |
| 8159169 | Parking brake control device In a parking brake control device, the minimum value of a motor current is set as an idle current after a motor begins to be driven, specifically, in a period during which the idle current is being sampled. As a result, the idle current is set to a value which refle... | 04/17/2012 |
| 8143827 | Error recognition by evaluation of parameters of the field oriented regulation A drive device having an electric motor with a device for field oriented control of the electric motor and a method for operation thereof is disclosed. An error monitoring of a transducer on the electric motor is achieved by a comparator device for comparing a trans... | 03/27/2012 |
| 8138703 | Method and apparatus for constraining output torque in a hybrid powertrain system A powertrain system includes a transmission operative to transfer power between an engine coupled to an input member and a plurality of torque machines and an output member, A method for controlling the powertrain system includes monitoring system operation and dete... | 03/20/2012 |
| 8138704 | Methods and systems for detecting current sensor error Methods and systems are provided for controlling an electric motor in a vehicle. A method comprises measuring current associated with a first phase of the electric motor using a first current sensor resulting in a measured first phase current and measuring current a... | 03/20/2012 |
| 8134321 | Motor control system for achieving peak torque In a motor controller, a modified interpolation technique uses an extrapolated torque command for the upper table to improve torque linearity under certain conditions. When the torque command input is greater than the max torque limit of a first look-up table, but l... | 03/13/2012 |
| 8134320 | Fuel cell drive system A motor system includes a drive motor configured to generate a drive force using power supplied from a fuel cell; an idle control unit configured to operate the fuel cell intermittently between an idle operation mode and an idle stop mode; a state detection unit con... | 03/13/2012 |
| 8134319 | Compensation of motor control using current-RPM relation for a ventilation system A method of constant airflow control includes various controls to accomplish a substantially constant airflow rate over a significant change of the static pressure in a ventilation duct. One control is a constant I·RPM control, which is primarily used in a low stat... | 03/13/2012 |
| 8111029 | Methods and systems for automatic rotation direction determination of electronically commutated motor A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower using the ECM and determining if the resulting blower rotation is indi... | 02/07/2012 |
| 8098035 | Motor control unit A motor control unit (10) includes: a power converter (40) having a rectifier circuit (20) which rectifies an AC voltage from an AC power supply (31), a capacitor circuit (22) which receives an output of the rectifier circuit (2... | 01/17/2012 |
| 8093848 | Motor driving apparatus and motor driving method One terminal of a first capacitor is set to a fixed electric potential. A charging/discharging circuit charges/discharges the first capacitor using a current that corresponds to an input signal which specifies the revolution of a motor. A comparator compares a volta... | 01/10/2012 |
| 8089234 | Motor control device, motored vehicle equipped therewith, and method of controlling a motor When a motor temperature exceeds a threshold value, a torque control unit reduces a torque control value for a motor generator. A torque limitation control unit determines from torque control value and vehicular speed whether limiting a torque by the torque control ... | 01/03/2012 |
| 8089235 | Electric driver unit An electric driver unit for an electric valve timing adjusting apparatus is disclosed. The electric driver unit includes: a motor for driving the apparatus; a switching part for applying a drive voltage to the motor; a current information output part for providing c... | 01/03/2012 |
| 8084977 | Motor control device and compressor A motor control device performing vector control for a motor that drives a load whose load torque varies periodically. The motor control device has: a motor speed deriving portion estimating or detecting a motor speed; a speed controller producing a specified torque... | 12/27/2011 |
| 8084976 | Motor control device and compressor A motor control device performing vector control for a motor that drives a load whose load torque varies periodically. The motor control device has: a motor speed deriving portion estimating or detecting a motor speed; a speed controller producing a specified torque... | 12/27/2011 |
| 8080955 | Driving method and related driving device for a motor A driving method for a motor includes sensing variation of magnetic pole of a rotator of the motor, to generate a magnetic pole sensing signal, determining dead zone of the motor according to the magnetic pole sensing signal, to generate a determination result, and ... | 12/20/2011 |
| 8080956 | Electric motor torque estimation A method of controlling a vehicle including a permanent magnet (PM) synchronous motor is provided. The motor is calibrated such that for each torque command, there are corresponding direct-axis (d-axis) and quadrature axis (q-axis) current commands. The method inclu... | 12/20/2011 |
| 8076884 | Control apparatus for electric vehicles A motor control apparatus for an electric vehicle has an AC motor system including a power conversion unit and a motor/generator. The power conversion unit performs conversion between DC power and AC power to drive the motor/generator. The motor control apparatus fu... | 12/13/2011 |
| 8063596 | Apparatus for carrying out improved control of rotary machine In an apparatus, a first drive unit drives, in a first range of a voltage utilization factor, a switching member to thereby control an output voltage of the power converter to be matched with a command voltage. A second drive unit drives, in a second range of the vo... | 11/22/2011 |
| 8058827 | Motor control apparatus having a function to calculate amount of cogging torque compensation A motor control apparatus that can calculate a proper amount of cogging torque compensation even in cases where components due to other factors than cogging torque (for example, components due to gravitational torque, etc.) are superimposed on a torque command being... | 11/15/2011 |
| 8058829 | Machine control system and method An electronic control module for a machine may include instructions for performing a method. The method may include obtaining a total torque load limit for one or more hydrostatic transmission loops in the machine. The method may also include allocating the total to... | 11/15/2011 |
| 8044624 | Load control apparatus and method for processing diagnosis signal for the same A load control apparatus outputs a PWM signal to a switching element to control a load. The switching element is connected between a power supply and a grand in series with the load. An abnormal increase detecting unit outputs an abnormal increase detection signal w... | 10/25/2011 |
| 8026683 | Motor controller A motor controller that outputs a drive signal to a direct-current brush motor to drive the motor is provided. The motor controller includes a drive signal generating section that generates the drive signal. The drive signal generating section generates the drive si... | 09/27/2011 |
| 8022650 | Control apparatus of electric motor An apparatus to control an electric motor to drive an electric-powered vehicle includes an accelerator position detector, a current controller to provide current to the electric motor through an inverter, a semiconductor device of the current controller configured t... | 09/20/2011 |
| 8018185 | Apparatus for carrying out improved control of rotary machine In an apparatus, a norm setter sets, based on a request torque for a rotary machine and a rotational velocity of a rotor, a norm of a vector of an a output voltage in a two-phase rotating coordinate system defined in the rotor. A phase setter sets, based on a deviat... | 09/13/2011 |
| 8018190 | Method and device for controlling and monitoring a hybrid four-wheel drive vehicle A method for controlling and monitoring a hybrid vehicle including a driving internal combustion engine, and an electric machine that is operational, upon an instruction, in a form of a driving engine and is powered by a battery. The method detects a vehicle operati... | 09/13/2011 |
| 8013555 | Drive system for a tap changer A drive system for operation of a tap changer for voltage regulation of a transformer on load. An electric motor is connectible to a movable part of the tap changer for moving the movable part for carrying out a tap change operation. An electric converter connects a... | 09/06/2011 |
| 8013554 | Shutdown path performance test for permanent magnet AC motor in hybrid powertrain A diagnostic system for a hybrid vehicle comprises a motor control module and a fault diagnostic module. The motor control module controls torque output of an electric motor having a predetermined number of phases. The fault diagnostic module determines a position o... | 09/06/2011 |
| 7994748 | Drive control system of an electric vehicle The object of the present invention is provide a drive control system of an electric vehicle that can prevent overshoot of the amount of slip. The drive control system of the electric vehicle includes: a motor to drive a driving wheel; a PDU; a number-of-revolution ... | 08/09/2011 |
| 7990091 | Pump controller system and method A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when s... | 08/02/2011 |
| 7990092 | 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... | 08/02/2011 |
| 7990093 | Electric motor control apparatus A control apparatus for a multiphase AC electric motor having an inverter includes a current control including an abnormal-state current controller; an abnormal-state detector that detects an abnormal state of any of a wire of an electric motor, a wire of an inverte... | 08/02/2011 |
| 7986117 | Apparatus for carrying out improved control of rotary machine In an apparatus, a phase setter sets, based on a deviation between a generated torque and a request torque for a rotary machine, a phase of a vector of a variable output voltage of a power converter in a two-phase rotating coordinate system defined in a rotor of the... | 07/26/2011 |
| 7986116 | Apparatus for controlling torque of electric rotating machine The apparatus is for controlling a torque of an electric rotating machine at a command torque by supplying command voltages in accordance with the command torque to a power conversion circuit driving the electrical rotating machine. The apparatus includes a detectin... | 07/26/2011 |
| 7973505 | Electric vehicle control device When an electric vehicle outputs a torque instruction, firstly, a request torque is acquired and a judged whether the acquired request torque is positive or negative (S10) Regardless of the sign of the request torque, it is judged whether the eco-switch is ON... | 07/05/2011 |
| 7973504 | Electric power steering control A method for improving a failure mode diagnostic of an electric power steering system by overcoming a motor electric lock condition due to position sensor signal corruption or other motor faults. If certain conditions are met, the method determines that the motor is... | 07/05/2011 |
| 7960930 | Control apparatus and method for motor drive system In the rectangular-wave voltage control mode, torque feedback control, in which the voltage phase of the rectangular-wave voltage is adjusted based on the deviation of the torque estimated value from the torque command value, is performed. A torque estimation portio... | 06/14/2011 |
