Electricity: motive power systems inventions 11/08

20080290823 - Method of controlling a roller blind actuator: A method of controlling an electromechanical actuator (ACT) comprising a motor (MOT) for maneuvering a mobile appliance (LD) of a building in a first direction (DIR1) and in a second direction (DIR2) by way of a remote-control unit (RCU) and a unit (MCU) for driving the motor that are placed... Agent: Frommer Lawrence & Haug

20080290824 - Apparatus and method for controlling operation of motor: An apparatus for controlling a motor includes an inverter to convert a DC voltage into an AC voltage, a power selecting circuit to select external power or power from the inverter, and a controller to control operation of the power selecting circuit according to a load of the motor.... Agent: Ked & Associates, LLP

20080290825 - Power architecture and braking circuits for dc motor-propelled vehicle: A dynamic braking circuit that can be operated with stability over both high and low speed regimes. This circuit has the advantage of using fewer components than previous circuits. In addition, when in braking mode, the armature and field currents tend to oppose each other across the main braking switch... Agent: Merchant & Gould PC

20080290826 - Motor controller: A motor controller stores values corresponding to predetermined equivalent resistance which corresponds to power loss generated by switching on and off switching elements. Voltage command values are determined by adding voltage drop values determined from values corresponding to the equivalent resistance and values of current flowing in the switching elements... Agent: Jordan And Hamburg LLP

20080290827 - Motor control apparatus and motor control method: Size and weight reduction of a motor-driven vehicle, robot or the like is achieved. A current command Iref from a speed feedback gain is supplied to each of circuits with coefficients of sin(θm), sin(θm+2π/3) and sin(θm−2π/3) to generate three-phase signals. The three-phase signals are respectively supplied to current control gains... Agent: Kenyon & Kenyon LLP

20080290828 - System and method for detecting a stalled motor: A system for detecting when a motor is stalled. The system including a voltage driving circuit and a voltage sensing circuit. The voltage driving circuit providing a driving signal to the motor through a connection node. The voltage driver circuit being configured to disconnect from the connection node while the... Agent: Visteon/brinks Hofer Gilson & Lione

20080290829 - Motor controller and electric power steering apparatus: In a motor controller, if a failed electric current flow in any one of phases of a motor is detected, a motor control signal is generated, based on a phase other than the phase with the failed electric current flow, in such a manner that a motor electric current matches... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080290830 - Stepping motor driving device, sheet processing device, and image processing apparatus: A stepping motor driving device drives a stepping motor according to a drive pulse of a step signal. A phase matching unit matches, at a time when there is a possibility that a rotor and a phase signal are out of phase with each other, phases of the rotor and... Agent: Harness, Dickey & Pierce, P.L.C

20080284358 - Controller for electromechanical braking system with power demand control and method: A system and method for limiting peak power demand of a controller (26) for an electromechanical actuator A motor current command is limited to at least one of a positive current limit or a negative current limit, the positive and negative current limits being a function of motor velocity. A... Agent: Don W. Bulson (grco) Renner, Otto, Boisselle & Sklar, LLP

20080284359 - Oscillation device, optical deflection apparatus, and drive-signal generating method: An oscillation device capable of generating a drive signal waveform with a sufficiently small number of harmonic components is provided. The oscillation device includes an oscillation system, a supporting unit configured to support the oscillation system, a drive unit configured to drive the oscillation system, and a drive control unit... Agent: Fitzpatrick Cella Harper & Scinto

20080284360 - Block switching transient minimization for linear motors and inductive loads: A block switch controller for a linear motor is disclosed, the block switch controller having a motor current threshold profile controlling the switching of a plurality of block switches in a linear motor. Also, a block switch controller for a linear motor comprising a closed loop vector current controller that... Agent: Ip Authority, LLC Ramraj Soundararajan

20080284361 - Method and circuit for regulating the speed of a commutator series-wound motor: The invention relates to a method and a circuit for regulating the speed of a commutator series-wound motor, especially a universal motor (10), which is supplied with a current from an a.c. voltage source (22) by means of a semiconductor switching element (18) mounted in series with an armature winding... Agent: Michael J. Striker

20080284362 - Adjusting device and control device of a vehicle: The invention relates to a control device of a vehicle seat for controlling a first drive and a second drive and for detecting jamming of a body part or of an object by means of an adjusting movement of an adjusting part, which can be adjusted in a first adjusting... Agent: King & Spalding

20080284363 - Hybrid electric cleaning device: A cleaning device includes a housing configured with a working element. The device also includes a motor configured for urging motion of the working element. The device also includes a power control module which may be electrically connected with at least one of the motor, a first power source configuration... Agent: Suiter Swantz PC Llo

20080284364 - Electronically commutated asynchronous motor: An electronically commutated asynchronous motor (12) features a stator (202), a short-circuit rotor (204), a controller (FOR 20) for field-oriented regulation of the motor (12), a sensor magnet (274) in thermally conductive connection with the short-circuit rotor (204), a rotor position sensor (14A; 18; 18′) arranged at a predetermined distance... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20080284365 - Servo system for a two-dimensional micro-electromechanical system (mems)-based scanner and method therefor: A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component.... Agent: Mcginn Intellectual Property Law Group, PLLC

20080284366 - Apparatus and mehtods for diagnosing motor-resolver system faults: Apparatus and methods are provided for diagnosing faults in multiple, associated motor-resolver systems. One apparatus includes a swapping circuit coupling a first resolver to a first or second decoder, and a swapping circuit coupling a second resolver to the first or second decoder. One method includes applying a signal from... Agent: General Motors Corporation Legal Staff

20080284367 - Power converter: A power converter is provided with a rectifying circuit, an inverter circuit, and a common mode filter including a common mode choke coil and a capacitor. The switching frequency of a PWM rectifying circuit is set at three times the switching frequency of a PWM inverter. Alternatively, the resonance frequency... Agent: Birch Stewart Kolasch & Birch

20080284368 - Apparatus and method for driving 2-phase srm: Disclosed is an apparatus and method for driving a 2-phase SRM capable of individually performing an initial driving by an initializing sensor and a normal driving by a driving sensor, and capable of controlling a rotation speed of the SRM by delaying a phase signal by a half period and... Agent: Greenblum & Bernstein, P.L.C

20080284369 - Power converters: The present invention is directed to a power converter that can be used to interface a motor 4 that requires variable voltage at variable frequency to a supply network (bus) providing a nominally fixed voltage and nominally fixed frequency. The power converter includes a first active rectifier/inverter 10 electrically connected... Agent: Kirschstein, Ottinger, Israel & Schiffmiller, P.C.

20080278101 - Control systems and methods for permanent magnet rotating machines: Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a plurality of phase windings and a rotor that rotates relative to the stator. A drive is connected to the phase windings for... Agent: Harness, Dickey, & Pierce, P.l.c

20080278102 - Rotary electric system designed to utilize zero-phase circuit: In a rotary electric system, a rotary electric machine is provided with an armature core and star-connected multiphase windings with a neutral point wound in the armature core. Each of the star-connected multiphase windings has a predetermined winding configuration that prevents, when a zero-phase current is supplied from a direct... Agent: Nixon & Vanderhye, PC

20080278103 - Motor control device: The present invention is a motor control device comprising a control system, the control system being capable of controlling the motor by PWM and having integration means being capable of outputting an integrated value obtained by integrating a deviation between a rotation speed and a target rotation speed of a... Agent: Sughrue Mion, PLLC

20080278104 - Control circuit of sensorless motor and control method thereof: A control circuit of a sensorless motor includes a first coil, a second coil, a first switch circuit, a second switch circuit and an auxiliary switch circuit. The first switch circuit is electrically connected to the first coil and controls a direction of a current flowing through the first coil.... Agent: Birch Stewart Kolasch & Birch

20080278105 - Robotic manipulator using rotary drives: A two degree-of-freedom positioning and manipulating apparatus is provided. The apparatus includes a first driven member rotatable about a first driven axis, a first driver member coupled to a first driven member for rotating the first driven member about the first driven axis, and a link member fixedly connected to... Agent: Mark D. Saralino (general) Renner, Otto, Boisselle & Sklar, LLP

20080278106 - Apparatus, system, and method for simulating outputs of a resolver to test motor-resolver systems: An apparatus, system, and method are provided for simulating outputs of a resolver. One apparatus includes an adjustable sine waveform generator for simulating first and second sine wave signals, and an adjustable cosine waveform generator for simulating first and cosine wave signals. The apparatus also includes an adjustable waveform generator... Agent: General Motors Corporation Legal Staff

20080278107 - Motor drive device, image reading device, image forming apparatus, and motor drive method: A motor drive device drives a stepping motor having a rotor mounted on a rotating shaft with a capability of making a transition between a plurality of excitation modes. A motor control unit drives the stepping motor by controlling the rotor to move to a position corresponding to an excitation... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080278108 - Motor and method for controlling operation of motor: A self-magnetizing motor incorporates a control circuit that starts the motor, controls a magnetizing unit, and then operates the motor. The control circuit can include relay, such as a bi-directional conductive power semiconductor device, and one or more PTC (Positive Temperature Coefficient) switches. This control circuit eliminates the need for... Agent: Ked & Associates, LLP

20080278109 - System and method for controlling input line harmonics in a motor drive: A motor drive system is disclosed that includes a power input configured to receive alternating current (AC) power and a rectifier having a switching frequency selected to convert the AC power to direct current (DC) power. The motor drive unit also includes an input filter circuit connected between the power... Agent: Rockwell Automation, Inc./(qb)

20080272715 - Position detection and external driver multiplexing system for dc motors: A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that... Agent: Delphi Technologies, Inc.

20080272716 - Linear induction machine control scheme, systems, and methods: A method and system for a control scheme for linear induction machines. The control scheme includes a maximum energy conversion ratio and a maximum acceleration and deceleration for linear induction machines.... Agent: Rosenbaum & Associates, P.C.

20080272717 - Method and apparatus to determine rotational position of an electrical machine: A control system and method to determine position of a rotor relative to a stator for a synchronous multipole electrical machine is presented, including one for application on a fuel/electric hybrid powertrain for a vehicle. The machine includes a stator, a rotor, and a rotor position sensing mechanism. The control... Agent: General Motors Corporation Legal Staff

20080272718 - Power electronic circuit arrangement for a rotating field machine: A power electronic circuit arrangement includes functional blocks for controllable, bidirectional energy exchange between a rotating field machine with at least one phase winding and an external energy store with one positive terminal and one negative terminal. At least one functional block is designed as a functional block that is... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20080272719 - Selectively configurable electric motor: A selectively configurable electric motor comprises a stator and a plurality of poles electrically coupled to the stator. The selectively configurable electric motor also includes an actuator separated from the poles by an air gap and configured to move relative to the stator in the presence of an electromagnetic field.... Agent: Caterpillar/finnegan, Henderson, L.L.P.

20080272720 - Accurate motor speed control: A method of and system for controlling a brushless direct current (BLDC) motor includes providing with a lookup table a predetermined corresponding desired revolution time (DRT) for the BLDC motor for an ambient temperature. A Hall device is used to measure an actual revolution time (RT) of the BLDC motor.... Agent: Schwegman, Lundberg & Woessner / Atmel

20080272721 - Control of a brushless electrical machine: A brushless electrical machine has at least one phase winding which produces magnetic flux in the machine. A controller controls the flux in the machine with reference to a demanded flux and a stabilisation signal which, in combination, enable the controller to operate in a stable manner in the presence... Agent: Haynes And Boone, LLP

20080272722 - Brushless direct current motor driving circuit: A brushless DC motor drive circuit includes a drive unit and a transient current suppression circuit. The drive unit comprises a Hall component, a drive component, a first transistor and a second transistor. The Hall component detects the position of a rotor of the DC motor and transmits digital command... Agent: Joe Mckinney Muncy

20080272723 - Absolute encoder and method for generating an absolute value for a angle of rotation: An electric motor (10) has: a stator (12) and a rotor (14) having a shaft (87). The rotor (14) has a sensor magnet (82) having a number SP of sensor poles (71, 72, 73, 74) for generating a predetermined distribution of the magnetic flux density, such that SP=2, 4, 6,... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20080272724 - Fan motor driving circuit: A fan motor driving circuit controls an energized state of a fan motor by performing on and off control of a switching circuit connected to a coil of the fan motor of a driving object. A variable reference voltage circuit generates a voltage whose voltage level changes with time by... Agent: Cantor Colburn, LLP

20080272725 - Load monitor: A load monitor for monitoring the load of a motor comprises a Central Processing Unit (CPU) and a memory. During normal operation of the motor, the load monitor is arranged to repeatedly measure the torque and registering the speed of the motor. In connection with each measurement of the torque... Agent: Birch Stewart Kolasch & Birch

20080272726 - Control apparatus and method for controlling an adjusting device in a motor vehicle: l

20080272727 - Method for determination of the risk to disturbance-free operation of a frequency converter: The invention relates to a method for determining the chance of a disturbance-free operation of a frequency converter (2) connected to a feeding network (18). According to the invention, during the operation of said frequency converter (2), an intermediate circuit voltage (UZK) is continuously measured and a network-side intermediate circuit... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20080272728 - Robotic joint: A driven joint for coupling two structural members is angularly adjustable in two polar or orthogonal dimensions and provides a pair of nonparallel, crossed axles, each having a middle section located between a pair of opposed side sections, wherein the pair of axles are mounted to each other along their... Agent: Burns & Levinson, LLP

20080272729 - Assembly of a motor vehicle body and control device of such an assembly: A control device is provided for an assembly of a motor vehicle body, which assembly can be moved between at least two positions, specifically at least between a position retracted to the maximum extent and a position deployed to the maximum extent, in particular a spoiler. The control device contains... Agent: Lerner Greenberg Stemer LLP

20080272730 - Control device for stepping motor: A control device for a stepping motor is provided that can reduce torque generated by a motor and control the expansion of a speed deviation when the rotational speed of a rotor exceeds a speed command. The control device includes first judging means (27) for judging whether a positional deviation... Agent: Alston & Bird LLP

20080272731 - Method and system for resolver alignment in electric motor system: Methods and systems are provided for aligning a resolver in an electric motor system. The method includes commanding a d-axis current command and a speed command, operating an electric motor without a load in response to the d-axis current command and the speed command, determining a rotor speed in response... Agent: General Motors Corporation Legal Staff

20080272732 - Method and system for motor control with delay compensation: Methods and systems are provided for controlling an electric machine via an inverter while compensating for one or more hardware delays. The method includes receiving a control signal, producing a first sampling signal based on the control signal, and adjusting the sampling signal to compensate for a first delay of... Agent: General Motors Corporation Legal Staff