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| Number | Title | Issue Date |
| 8093852 | Motor control device A motor control device has a plurality of drive circuits that are respectively provided on arms of an inverter circuit that supplies current to an AC motor, the plurality of drive circuits driving respectively a plurality of switching elements included on the arms; ... | 01/10/2012 |
| 8018191 | Electric power steering system A main power supply and an auxiliary power supply for supplying power to a motor are provided. A MOS-FET for supplying power from the main power supply and a MOS-FET for supplying power from the main and auxiliary power supplies are provided. When a phenomenon in wh... | 09/13/2011 |
| 8004225 | Drive control circuit for electric motor and electric motor equipped with same The drive control circuit (200) includes a driver circuit (250) for intermittently supplying the magnetic coils with a supply voltage VSUP; a switching signal generating circuit (240) that generates a switching signal supplied to the driver circ... | 08/23/2011 |
| 7830108 | Device for supplying electrical power to a fuel pump of a motor vehicle internal combustion engine A device (1) for supplying electric current to the fuel pump (2) of a motor vehicle internal combustion engine (3) comprises a DC/DC converter (13) which increases voltage to a predetermined value in the event of a voltage drop of a direc... | 11/09/2010 |
| 7746016 | Fan controller A fan controller includes an input module and an output module. The input module is used for receiving a power supply signal from a power supply which is used for providing power to a fan, and outputting a trigger signal when the power supply signal when the power s... | 06/29/2010 |
| 7436142 | Method for maintaining a direct voltage at the input of a DC/AC voltage converter, recording medium for this method, and electric vehicle This method maintains a direct voltage at the input of a DC/AC voltage converter in order to maintain an asynchronous motor in a magnetised state, the input of the converter being connected to a DC supply bus of an electric vehicle, and comprises, in a free wheel mo... | 10/14/2008 |
| 7336048 | Method for operating a power tool In a method for operating a power tool with an energy accumulator, in particular a rechargeable energy accumulator, which supplies power to an electric drive motor, a clock frequency is generated by an electronic unit, with which a gate of a MOSFET—which supplies ... | 02/26/2008 |
| 7330007 | Object detecting apparatus An object detecting apparatus includes a piezoelectric sensor provided at an edge portion of an opening/closing body for emitting an output voltage which changes corresponding to an external force applied to the edge portion and a detection circuit for receiving the... | 02/12/2008 |
| 7330129 | System and method for data retrieval in AC power tools via an AC line cord An apparatus and method for obtaining data stored in an electronic module within a power tool over a power line cord of the tool, and without any disassembly of the tool being required. An interface subsystem applies a high frequency, low power AC input signal to th... | 02/12/2008 |
| 7292006 | Controlled DC power supply for a human powered vehicle A DC power supply apparatus used with a power storage element comprises a rectifier circuit that converts AC current from an alternating current generator into a DC current; an input current adjusting circuit that receives DC current from the rectifier circuit to ad... | 11/06/2007 |
| 7279864 | Control unit for driving a regulating transistor of a fan arrangement A control unit for driving a regulating transistor (2) of a fan arrangement, in which the regulating transistor (2) is connected in series with an electronically commutated fan (1), having control means (5, 6, R1, R2) for th... | 10/09/2007 |
| 7221117 | Method and system for controlling an electric motor in the event of flux reduction The present invention relates to a method and a system for correcting references (xref), in the case of flux reduction, used in a speed variator for controlling an electric motor M having a three-phase supply, for example of the synchronous or asynchronou... | 05/22/2007 |
| 7190143 | Pulse width modulation (PWM) rectifier with variable switching frequency A method for controlling a device including a plurality of switching devices operated in accordance with a pulse width modulation technique includes receiving a reference voltage signal associated with a first pair of the switching devices. A switching signal is gen... | 03/13/2007 |
| 7164250 | Open-loop voltage driving of a DC motor The driving voltage of the motor is incremented a quantity proportional to the speed of the motor according to a proportionality factor that is adjusted to compensate the back electromotive force. A method includes open-loop voltage control of a DC motor having a ce... | 01/16/2007 |
| 7129668 | Actuator control unit An actuator control device includes an electrical control unit for detecting the present positions of output shafts of servo motors, and communicating with control circuits for driving the output shafts of the servo motors to target stop positions on the basis of th... | 10/31/2006 |
| 7122982 | DC motor rotation information detecting device A rotation information detection device detects rotation information of a DC motor based on a surge component waveform superimposed on a voltage waveform between the terminals of the DC motor or a current waveform of the DC motor, a circuit is provided which supplie... | 10/17/2006 |
| 7116067 | Power converter controlling apparatus and method providing ride through capability during power interruption in a motor drive system A method of controlling a power converter (20) of a motor drive system (10)controls the power converter (20) during a first operating mode by applying a current control scheme, which sets power converter commands to control torque current flowin... | 10/03/2006 |
| 7106012 | Electronic control unit, electric power-assisted steering device and transmission ratio-variable steering unit An electronic control unit for producing a sufficiently boosted voltage even when a supply voltage becomes high includes an inverter that drives switching elements and converts a DC voltage into an AC voltage, and booster means which boosts a DC voltage that is inpu... | 09/12/2006 |
| 7081734 | Ride-through method and system for HVACandR chillers A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at least one motor. An inductio... | 07/25/2006 |
| 7061202 | Automobile servomotor controller An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a dr... | 06/13/2006 |
| 7038422 | Electrical actuator system and vehicle air conditioner using the same In a vehicle air conditioner with an electrical actuator system, a transmission mechanism transmits a rotation force of an electrical motor to an air mixing door when first and second pulse signals are generated from first and second brushes in a door operation regi... | 05/02/2006 |
| 7015598 | Power control apparatus for a bicycle A power control apparatus for a bicycle that uses a first power supply and a second power supply to provide electrical power includes a voltage sensor for sensing a voltage from the first power supply. A control unit is coupled to the voltage sensor and is coupled f... | 03/21/2006 |
| 7005815 | Electric actuator system The detection of a pulse signal in an initialization pattern is ensured regardless of the position where a DC motor is stopped. A CPU detects the pulse signal generated by the pulse generator and an angle of rotation of a rotating shaft, and controls an angle of rot... | 02/28/2006 |
| 7005821 | Servomotor controller In a servomotor controller, when a comparing circuit (70) detects that a position of an object to be controlled has been achieved to a target position, an operation inhibiting signal generating section (71) supplies an operation inhibiting signal (7... | 02/28/2006 |
| 6972536 | Closure member control device and method for limiting positional deviation of closure member A control unit stores a count value, which is used to detect an operational position of a roof glass, in a RAM. The control unit determines whether the count value is properly stored in the RAM when a voltage of a power supply falls below a predetermined voltage and... | 12/06/2005 |
| 6922299 | Power saving method and apparatus for driving a spindle motor and voice coil motor in a disk drive In the high-speed seek mode in which priority is given to making the seek operation faster, the CPU sets the driving voltage applied to a motor driver that drives both a spindle motor and voice coil motor to a first driving voltage. Furthermore, in the high-efficien... | 07/26/2005 |
| 6831429 | Prediction of available torque and power from battery-powered traction motor Available torque output from a battery-powered traction motor system in a vehicle is estimated, wherein the system includes a high-voltage battery coupled to a traction motor by an inverter, wherein the inverter is controlled in response to a torque/speed command wi... | 12/14/2004 |
| 6801007 | Electrically-operated actuator system A motor stopping circuit is activated when a motor control circuit is stopped by a reset signal outputted from a reset circuit. This maintains an overrun angle small. As a result, a difference between a rotation angles measured when the motor control circuit is turn... | 10/05/2004 |
| 6788017 | Period adjustment circuit of disconnection and restart IC A period adjustment circuit of disconnection and restart IC comprises a second capacitor, which is connected to a resistor and a transistor connected in parallel. One end of the resistor is connected between the disconnection and restart IC and the first capacitor. ... | 09/07/2004 |
| 6757587 | Method and apparatus for dynamically reprogramming remote autonomous agents An apparatus and associated method, the apparatus comprising a controlled element (10), such as a robotic manipulator, and a dynamically updatable control system (11). The control system (11) uses a control system equation (eq. (1)) to determine... | 06/29/2004 |
| 6686718 | Control loop and method for variable speed drive ride-through capability improvement A variable speed drive (VSD) having a rectifier, an inverter, an inverter modulator, an inverter controller, and a control loop, for controlling a motor load, wherein the control loop reduces an amount of power transferred to the inverter during a voltage... | 02/03/2004 |
| 6646400 | Power control circuit for a bicycle electromotive unit A power control circuit having an input for receiving power from a power source and an output for driving a bicycle electromotive unit comprises a storage unit; a first switching element disposed between the storage unit and the output; a voltage sensor t... | 11/11/2003 |
| 6617817 | Electrical time constant compensation method for switched, voltage-mode driver circuit A power driver for driving a signal on a load using voltage-mode driver. A system processor generates commands indicating a programmed drive signal desired from the voltage-mode driver. A lead compensator determines a compensated command to compensate for... | 09/09/2003 |
| 6600284 | System for detecting obstacles In an arrangement for detecting obstacles, particularly during the automatic closing of convertible tops, motor-vehicle windows or the like, a capacitive sensor device is provided, made up of an electrically conductive transmitter area on the one side and... | 07/29/2003 |
| 6515441 | Glass edge object detection sensor An object detection system includes a sensor in communication with a controller which identifies contact with the sensor. In a preferred embodiment the sensor is a piezo film which generates a signal when an object applies a predetermined force to the edg... | 02/04/2003 |
| 6473562 | Method for low-speed operation of brushless DC motors A method to operate an electronically commutated DC motor driving a centrifugal pump and comprising a stator fitted with at least one winding and a rotor fitted with permanent magnets, said method including a monitored stepping operation within which one ... | 10/29/2002 |
| 6452358 | Electronic apparatus and control method for electronic apparatus In an electronic apparatus which includes a power generator and a storage device for storing electric energy obtained thereby, it is detected whether a motor driven by the stored electric energy is rotating by comparing the rotation detecting voltage, whi... | 09/17/2002 |
| 6337549 | Capacitive anti finger trap proximity sensor The present invention relates to a trapping protector capable of detecting the presence of an object in a sensing region when connected with a device for creating input signals and evaluating output signals. Said trapping protector comprises a body portio... | 01/08/2002 |
| 6160370 | Safety device for automobile power window system A pair of capacitors are provided at a window sash or a window glass edge. Each capacitor is connected to two variable phase delay generators in parallel. Selectors are inserted between the capacitors and variable phase delay generators. Each selector alt... | 12/12/2000 |
| 6081080 | Method and apparatus for reducing voltage stresses in electric machines A method and apparatus for reducing winding failures in electric machines resulting from the application of high frequency or high dV/dt voltage pulses or voltage signals to the phase windings of the machine in which an inductive element is provided betwe... | 06/27/2000 |
