Electricity: motive power systems inventions 09/08

20080231216 - Method for control of a reluctance motor: The invention relates to a method for control of a reluctance motor which has a rotor (1) and a stator (4), the rotor (1) having a plurality of rotor segments (3) and the stator (4) having a number of coils (6), the number of coils being dependent on the number... Agent: Collard & Roe, P.C.

20080231217 - Brushless dc motor control method and brushless dc motor controller: The present invention discloses a control technology for brushless DC motor, in which firstly it is to build or import a motor running parameters' database, then detect the signals always running and the signals closely relevant to the rotor's rotating state such as the voltage and the current, and process... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20080231218 - Apparatus and method of driving motor, and drive apparatus using the same: An open-loop driving method of a spindle motor includes determining of whether open-loop driving conditions for the spindle motor are met, and adjusting widths of driving pulses applied to the spindle motor according to a predictive speed variation of the spindle motor when it is determined that the open-loop driving... Agent: Stanzione & Kim, LLP

20080231219 - Motor drive apparatus and motor drive method: To reduce noise by limiting a current peak value to a predetermined value or less and by smoothing the waveforms of drive currents during the current limitation, switching control means (30) according to the present invention turns ON all of one-side drive transistors selected from the high-side drive transistors (21,... Agent: Ratnerprestia

20080231220 - Image forming apparatus appropriately setting current value for driving motor: When a printing instruction is provided, a CPU causes a stepping motor M to drive a developer and calculates the value of a load of the stepping motor M before printing operations are performed. Then, CPU determines whether the value of the load is within a predetermined range stored in... Agent: Buchanan, Ingersoll & Rooney PC

20080231221 - Arm-equipped mobile robot and method for controlling the same: A mobile robot contains a movable robot body, arms provided on the movable robot body, each of the arms having a multiple joint structure including plural joints, an actuator for actuating each of the joints and shaft torque sensors incorporated in each of the joints to detect a torque from... Agent: Charles N.j. Ruggiero, Esq. Ohlandt, Greeley, Ruggiero & Perle, L.L.P.

20080231222 - Wheeled moving robot: A wheeled moving robot including a main body; wheels provided at least at opposite sides of the main body and configured to move the main body; an actuator configured to generate torque which rotates the wheels; a detector configured to detect whether the main body moves when the wheels rotates... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080231223 - Rotor driving control device and image forming apparatus: A device of a motor with a rotation control means that decreases the fluctuation of its rotation period. The control is carried out based on the amplitude and the phase generated by amplitude-and-phase generating devices, detecting passage time of detected portions (13) in different zones. And a color image forming... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080231224 - Timer circuit and time count method: A timer circuit includes a storage unit to store a series of first data content relating to a time into a specified address area, a target value generation unit to read the first data content from a read address of the storage unit and to generate, as a target value,... Agent: Amin, Turocy & Calvin, LLP

20080224639 - Method and device for commutating electromechanical actuators: The invention relates to the commutation of electromechanical, commutatorless actuators, more particularly of permanent magnet motors and reluctance motors, having a rotor and a stator including at least one stator winding (W1, W2) that is/are operated with a constant current (IPWM). The method for determining the moment of commutation used... Agent: Foley And Lardner LLP Suite 500

20080224640 - Brake-controllable brushless motor: A brake-controllable brushless motor has a rotor and a stator having polyphase coils; a polar position detector whereby electric power is supplied to the coil selected by its phase in response to the polar positions of the rotor detected by the polar position detector; a driver division for controlling the... Agent: Wood, Phillips, Katz, Clark & Mortimer

20080224641 - Driver for a brushless motor and data reading/writing device comprising a brushless motor controlled by such a driver: A driver for a brushless motor (10) is described comprising a static position sensing device (22), a back EMF detector for detecting a back EMF voltage (40), comprising a filter (42). The driver further comprises an output stage (30) with at least three modules (30U, 30V, 30W) for supplying a... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080224642 - System and related methods for diagnosing operational performance of a motorized barrier operator: A barrier operating system having a diagnostic performance feature includes a motorized barrier movable between limit positions and a counterbalance system coupled to the barrier. A disconnect mechanism may be interposed between the motor and the counterbalance system so that the barrier can be moved manually without assistance from the... Agent: Renner Kenner Greive Bobak Taylor & Weber

20080224643 - Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor: In order to prevent a short circuit of top and bottom arms of a motor driving IC when noise is added to six control signals for controlling six switching elements, there is provided a semiconductor device for driving a motor, being sealed with resin as one package and comprising: six... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080224644 - Method capable of controlling initial current for driving a motor: A method capable of controlling initial current value for driving a motor includes following steps: (a) an output reference level of a driving unit being connected to a motor coil set to operate a motor constituted with the motor coil set; (b) a magnetic pole change being detected with a... Agent: G. Link Co., Ltd.

20080224645 - Control system for synchronous electric motor: A control system for a synchronous electric motor controls the synchronous motor so that the phase of a current determined based on a magnetic pole position of a moving element of the motor may shift to a phase where maximum torque may be obtained. A magnetic pole position correcting section... Agent: Rankin, Hill & Clark LLP

20080224646 - Open loop method for controlling power: c

20080224647 - Digital high-resolution controller: Kinematic control of an electronic positioner and its associated actuator is effected through a control algorithm that delivers energy to the actuator based on observed motion produced by a previous delivery of energy. The algorithm achieves control based on a desired or user-specified resolution. Electronic braking between energy delivery intervals... Agent: Harness, Dickey & Pierce, P.L.C

20080224648 - Motor control device, method and program storage medium: There are provided a motor control device and a method for deciding a velocity instruction shape within the limit of a movement range, a velocity, and an acceleration of an object device while maintaining the acceleration as high as possible in inertia identification. The motor control device includes a position... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080224649 - Anti-windup control for a current regulator of a pulse width modulation inverter: A control architecture for an electrical inverter includes a command limiter that is realized as a circular voltage limiter. The command limiter includes a Cartesian-to-polar converter coupled to a command source such as a synchronous frame current regulator. The Cartesian-to-polar converter provides magnitude and phase components for d-q command voltages.... Agent: General Motors Corporation Legal Staff

20080224650 - Feed motor lock detection device: A feed motor lock detection device detects a back-electromotive voltage in a feed motor M and checks whether the feed motor M is in a driven state or in a non-driven state based on the level of the back-electromotive voltage.... Agent: Fish & Richardson P.C.

20080224651 - Method and system for controlling permanent magnet ac machines: Methods and systems are provided for controlling permanent magnet machines under varying loads. The method comprises generating a d-axis voltage command and a q-axis voltage command, producing a modified d-axis current command based on the q-axis voltage command and a d-axis current command, converting the modified d-axis current command to... Agent: General Motors Corporation Legal Staff

20080218103 - Load driving method: A load driving device controls two motors by PWM signals. When a standard duty ratio of the PWM signals is 50% and a level of a drive instruction is the standard duty ratio, the standard duty ratio are output to the respective motors to provide a reverse phase relationship that... Agent: Posz Law Group, Plc

20080218104 - Power management for multi-module energy storage systems in electric, hybrid electric, and fuel cell vehicles: An electric energy storage system (EESS) for providing a power management solution for a multi-subsystem energy storage in electric, hybrid electric, and fuel cell vehicles. The EESS has a controller that determines when to draw power from each subsystem as needed by the vehicle.... Agent: Douglas H. Pauley Pauley Petersen & Erickson

20080218105 - Method for operating a fuel pump: In a method for operating a fuel pump of a motor vehicle, the fuel pump is driven by an EC electric motor for conveying fuel in a direction of an internal combustion engine. Accordingly, when no more fuel is required, the EC electric motor of the fuel pump is switched... Agent: Lerner Greenberg Stemer LLP

20080218106 - Method of recovering energy form the turntable motor in an optical disc drive and optical device: The present invention relates to a method of recovering energy from the turntable motor (12) in an optical disc drive comprising a power supply and a circuitry (10) that is capable of selectively feeding a current from the power supply into the motor in a first state and from the... Agent: Philips Intellectual Property & Standards

20080218107 - Motor drive unit and electric apparatus having a motor: A motor drive unit capable of detecting the position of a stationary rotor of any type of sensorless motor, determining a proper startup logic for the rotor, and starting up the motor in a stable condition. To do this, multiple stator coils of the sensorless motor are supplied with rotor-position... Agent: Rohm Co., Ltd. C/o Keating & Bennett, LLP

20080218108 - Motor driving device and motor unit: A motor driving device includes an output circuit, a control circuit, a backflow preventing diode, and a capacitor. The output circuit is driven by a first voltage, includes a switching element of which turning-on/off is switched according to a switching control signal, and outputs current to motor coils when receiving... Agent: Sonnenschein Nath & Rosenthal LLP

20080218109 - Aperture driving apparatus and projection type image display apparatus: An aperture driving apparatus includes a swing unit and a stationary unit. The swing unit includes an aperture plate that partially blocks a light, a coil that constitute a voice coil motor for obtaining a driving force for driving the aperture driving plate, and a swing arm that supports the... Agent: Birch Stewart Kolasch & Birch

20080218110 - Temperature tripping device: The invention relates to a temperature tripping device for reliably shutting down a load, especially a motor, having at least one input for receiving at least one temperature-dependent sensor signal as an input signal, a first evaluation circuit for generating a first output signal if the input signal reaches a... Agent: Stites & Harbison Pllc

20080218111 - Control device for motor drive system and electric vehicle including the same: A square wave voltage having an amplitude equal to an output voltage of a converter is applied to an AC motor by a square wave control block. Torque control of the AC motor is performed basically by changing the voltage phase of the square wave voltage according to the torque... Agent: Oliff & Berridge, Plc

20080218112 - Methods and systems for recording operating information of an electronically commutated motor: A unit for recording operating information of an electronically commutated motor (ECM) is described. The unit includes a system controller communicatively coupled to an ECM. The system controller includes a processing device configured to control the unit. The unit also includes a memory device communicatively coupled to the system controller.... Agent: Patrick W. Rasche Armstrong Teasdale LLP

20080218113 - Output contact for feedback in integrated circuit motor driver: An integrated circuit has drive circuitry to drive the windings of an electrical motor, means to make a measurement from the drive circuitry during rotation of the motor, suitable for use as motor control feedback, and has an output contact through which the motor control feedback measurement is available as... Agent: Workman Nydegger

20080218114 - Mixed device for controlling power transfer between two cores of a direct current network and supplying an alternating current motor: A combined device for instantaneous control of power transfer between two cores of a direct current network and for powering an alternating current engine. The device includes: an assembly of two three-phase inverters, each including three switching cells connected to the engine, which engine includes three stator windings connected to... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080218115 - Numerical controller with abnormal motor deceleration stop control means: While a numerical controller is operating, an abnormality of a numerical control section is detected. In response to an abnormality detection signal, a motor deceleration stop control circuit of a servo section is actuated to perform speed control with a speed command “0”, thereby stopping a motor. If an actual... Agent: Drinker Biddle & Reath (dc)

20080218116 - Servo controller: A servo controller for synchronously controlling a master driving source for driving a driving shaft and a slave driving source for driving a driven shaft, having a position control section that performs a position control based on a positional deviation which is a difference between a position command value given... Agent: Lowe Hauptman Ham & Berner, LLP

20080218117 - Method for turning a three-phase current motor on again and electrical circuit for implementing the method: A method for turning a three-phase alternating current motor on again, after it has been separated from a supply voltage, if a residual field voltage induced by a rotor residual field is present, and to an electrical circuit for implementing the method. The time progressions of the residual field voltage... Agent: Collard & Roe, P.c.

20080218118 - Efficiency maximization control and variable speed drive of single phase induction motors: A control method and a control system for single phase induction motors driven by two-power electronic switch inverter are disclosed. The system fulfills two main tasks i.e. precise motor speed control and maximum motor efficiency control over wide ranges of motor load and speed command without a motor speed feedback.... Agent: Barry Choobin

20080218119 - Method for operating a delta wound three-phase permanent magnet brushless motor: Method for operating a delta wound three-phase permanent magnet brushless motor. A transition speed is determined in a quadrant of a speed versus torque curve above which speed continues to increase while current/torque decreases wherein actual phase current can be controlled in a current control modification manner which reduces requested... Agent: Delphi Technologies, Inc.

20080211432 - All wheel drive vehicle: The present invention relates to the field of electric-motor-driven vehicles such as cars, motorcycles, scooters, electric-motor trains, etc. Embodiments of the invention seek to provide an economic all-wheel-drive (AWD) vehicle possessing high dynamic characteristics and a relatively simple scheme of control over the operation of electric motors. An AWD vehicle... Agent: Pearl Cohen Zedek Latzer, LLP

20080211433 - Vehicle driving system: Solution: In a four-wheel drive vehicle, front wheels 14L and 14R are driven by an engine 1, and rear wheels 15L and 15R are driven by an electric motor 5. A high-power alternator 2 is driven by the engine 1, and electric power generated from the alternator 2 drives the... Agent: Crowell & Moring LLP Intellectual Property Group

20080211434 - System, method and computer readable media for reducing wheel sliding on a locomotive: A system for reducing wheel sliding on a locomotive is provided for a locomotive including a plurality of axles. The system includes one or more speed inferring systems coupled to each axle to detect rotation of each axle and generate detection signals based upon detecting rotation of each axle. The... Agent: Beusse Wolter Sanks Mora & Maire, P.A.

20080211435 - Vibration generator: A vibration generator has an oscillator including a magnet and a holding member for holding the oscillator based on a magnetic force emitted from the oscillator. The holding member includes a magnet or a magnetic body. The oscillator vibrates relative to the holding member. A magnetic force between the oscillator... Agent: Kirton & Mcconkie

20080211436 - Measuring apparatus with a measuring head for determining the position of a primary part on a secondary part and method for determining the position of a primary part on a secondary part wtih a measuring head: The invention relates to a measuring apparatus comprising a sensing head (15) for determining the position of a primary part (27) on a secondary part. The sensing head (15) is fixedly connected to a primary part (27) or is integrated therein while the primary part (27) and the secondary part... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20080211437 - Power supply system for driving electric rotating machine: An electric power supply system for driving an electric rotating machine has a generator supplied with driving power from an engine to generate alternating-current electric power and a matrix converter as an alternating-current to alternating-current direct converter supplied with the alternating-current electric power to output arbitrary alternating-current electric power. By... Agent: Rossi, Kimms & Mcdowell LLP.

20080211438 - Fully charged battery protection: A method for protecting against overcharging a battery of a light-weight utility vehicle during regenerative braking includes controlling a regenerative braking process such that a predetermined activation amount of braking torque is produced by a motor of the vehicle when braking torque within a full braking range is initially requested.... Agent: Harness, Dickey & Pierce, P.L.C

20080211439 - Drive device for a brushless motor: A drive device for a brushless motor executes an abnormality diagnosis (disconnection/short-circuit) of a motor side circuit. In detecting abnormality of the motor side circuit, the drive device includes a terminal voltage monitor circuit that monitors a terminal voltage of an output terminal that is connected to a motor terminal... Agent: Nixon & Vanderhye, PC

20080211440 - Measurement of speed and direction of coasting permanent magnet synchronous motor: A method for determining the speed of rotation of an unpowered, coasting electric motor, driven, when powered, by an electronic inverter, and without activating switches of the inverter. The steps include determining an electrical frequency of a back emf signal generated at a terminal of the motor or switching node... Agent: Ostrolenk Faber Gerb & Soffen

20080211441 - Motor controller of electric power steering device: In a motor controller which supplies electric power to a motor of an electric power steering device from a main power supply and an auxiliary power supply, an N-channel MOS-FET is connected in parallel with a diode which is provided to prevent a sneak current from the auxiliary power supply... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080211442 - Seatbelt apparatus: This seatbelt apparatus includes: a belt reel around which a belt is wound; a motor which rotationally drives the belt reel; a transmitting device which transmits a driving power between the belt reel and the motor; a controller which drives the motor while controlling an electricity to be supplied to... Agent: Rankin, Hill & Clark LLP

20080211443 - Electronic apparatus and method of controlling electric motor mounted in electronic apparatus: An electronic apparatus includes: a timer member that clocks time on the basis of the power supplied from a power source. A power supply member supplies the power to an electric motor of the electronic apparatus and to the timer member from the power source and interrupts the power supply... Agent: Workman Nydegger

20080211444 - Control apparatus for transmission mechanism, transmission, vehicle provided therewith, method of controlling the transmission mechanism, and method of estimating heat value of electric motor in the transmission mechanism: A motorcycle has a transmission including a transmission mechanism and an electronic control unit (ECU). The transmission mechanism includes a crankshaft as an input shaft, a driven shaft as an output shaft and an electric motor. The electric motor changes continuously the transmission ratio between the crankshaft and the driven... Agent: Hogan & Hartson L.L.P.

20080211445 - Aircraft cabin pressure controls: duty cycle offset to compensate for asymmetric motor loading in an open-loop motor control system: A cabin pressure control system (CPCS) software control logic modification may boost the voltage applied to a motor by applying a duty cycle offset to compensate for asymmetric motor loading. The motor may be part of an open-loop system for operating a butterfly valve that may regulate outflow from the... Agent: Honeywell International Inc.

20080211446 - Control apparatus of electric power steering apparatus: The present invention provides a control apparatus of a electric power steering apparatus which can suppress a vibration and a noise of a motor caused by a torque ripple which is generated at a tie of applying a field-weakening control to the motor or on the basis of a motor... Agent: Sughrue Mion, PLLC

20080211447 - Motion control using electromagnetic forces: Motion control using electromagnetic forces. The control of motion in unpowered apparatus and an apparatus driven by electric motors and/or other prime movers utilizes electromagnetic force/torque for control of motion. One objective is to extend the domain of electric motor speed control, traditionally characterized by electronic techniques, to small apparatus... Agent: Choate, Hall & Stewart LLP

20080211448 - Synchronous machines: The present invention relates to electrically magnetized synchronous machine comprising an electrically magnetized rotor, and electrically supplied sator windings, whereby it further comprises non-linear means, optionally controllable, such as rectifying means in a series with three sator phase windings, whereby a rotor field winding is arranged to be fed from... Agent: Gauthier & Connors, LLP

20080211449 - Multiphase current supplying circuit, driving apparatus, compressor and air conditioner: A multiphase current supplying circuit includes a converter, an intervening circuit, an inverter, a control circuit and a lightning arrester. A power supply system is connected to the converter with the lightning arrester interposed therebetween, and the ac voltage is rectified. The intervening circuit includes a capacitor and a bypass... Agent: Birch Stewart Kolasch & Birch

20080211450 - Rotating machinery controller: A rotating machinery includes a first control member for performing rectangular wave control by operating the switching devices of an inverter such that an on-state and an off-state occur once for one cycle period in electrical angle of a motor, a second control member for operating the switching devices on... Agent: Nixon & Vanderhye, PC