Electricity: motive power systems inventions

20090278481 - Apparatus and system for efficiently controlling a hub motor: An apparatus, system, and method are disclosed for an efficient hub motor. A stator is attached to a shaft. Coils are embedded in the stator in a circular pattern. Two rotors are rotatably coupled to the shaft with the stator between them. Permanent magnets are embedded in each rotor. Each... Agent: Kunzler & Mckenzie

20090278482 - Servomotor current control method, current control program, recording medium, servomotor, and injection molding machine: A method of controlling a current by supplying a d-axis current in order to prevent a voltage saturation includes: defining an amount of the d-axis current as Id=|Idmax|·sin θ; continuously comparing a voltage command value with the voltage command value threshold Vo in a predetermined cycle; extracting a predetermined number... Agent: Dla Piper LLP Us

20090278484 - Fan conducted noise reduction: A power circuit has an input circuit for coupling to a power supply to receive input current. One or more fans are driven with current pulses from an output circuit. Commutation noise from the current pulses back to the power supply is minimized. The commutation noise may be minimized by... Agent: Schwegman, Lundberg & Woessner, P.A.

20090278483 - 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 further includes a decoupling control section configured to perform... Agent: Nixon & Vanderhye, PC

20090278485 - Device and method for determining the rotational position of a rotor in an electric machine: The invention relates to a device and a method for determining the rotational position of the rotor of an electric machine that has star-connected pole winding phases. The device is equipped with a unit for applying voltage pulses (14-16) to at least one of the phases (1-3) and a unit... Agent: Friedrich Kueffner

20090278486 - Motor controlling method for rotating a lift arm of an adjustable bed according to a predetermined bending angle of the lift arm: In an adjustable bed, a bending angle of a lift arm is precisely adjusted according to generated signals corresponding to a wheel rotated by a motor of the adjustable bed or according to a current state related to the wheel. The signals are generated according to whether light is obstructed... Agent: North America Intellectual Property Corporation

20090278487 - Fan control circuit: A fan control circuit for controlling a fan to dissipate heat from an electrical device includes a comparator and an electrical switch. The comparator has a comparator input terminal, a comparator reference terminal, and a comparator output terminal. The comparator input terminal is connected to a power source via a... Agent: PCe Industry, Inc. Att. Steven Reiss

20090273306 - Fan speed control circuit: The fan speed control circuit and system of the present invention includes a capacitor or internally triggered triac to enable current to flow across the terminals of an electrical switch for a fan motor when the switch is in the open and OFF position to permit continued operation of a... Agent: Barlow, Josephs & Holmes, Ltd.

20090273307 - Remote vertical blind opening and closing system: A remote blind actuating system for use in opening and closing blinds with a string incorporates a motor, a pulley, a receiver, and a housing. The motor, the pulley, and the receiver are disposed within the housing. The motor is connected with the pulley and is in communication with the... Agent: Law Offices Of Andrew Schroeder

20090273308 - Position sensorless control of permanent magnet motor: Systems and methods of controlling a permanent magnet motor without a mechanical position sensor are provided. In accordance with one embodiment, a motor control system includes an inverter configured to receive direct current (DC) power and output a power waveform to a permanent magnet motor, driver circuitry configured to receive... Agent: Fletcher Yoder Law (for Rockwell Automation)

20090267545 - Method and arrangement in connection with a brake chopper: A method of controlling a brake chopper and a control arrangement, the brake chopper being connected between the positive and the negative rails of an intermediate voltage circuit feeding an inverter bridge, wherein current measurement means are arranged between a DC voltage source and the brake chopper and adapted to... Agent: Buchanan, Ingersoll & Rooney PC

20090267544 - Motor control circuit and operation method thereof: A motor control circuit for controlling a motor includes a brake circuit and a control circuit. The brake circuit is for making the motor enter a braking state. The control circuit is for detecting a residual energy of the motor in the braking state. When the residual energy conforms to... Agent: North America Intellectual Property Corporation

20090267547 - Motor control device and magnetic pole position estimation precision confirming method: A motor control device includes a dq-axis current control unit for generating a dq-axis voltage reference based on a dq-axis current reference and a dq-axis current signal, an initial magnetic pole position estimation unit for estimating a magnetic pole position of the motor upon power-on to generate a magnetic pole... Agent: Ditthavong Mori & Steiner, P.C.

20090267546 - Motor control device, motor drive system, washing machine, air conditioner and method of changing magnetization amount of permanent magnet motor: A motor control device includes a magnetization control unit energizing a motor winding to change magnetic flux content of permanent magnet motor, a current detector detecting current supplied to the motor, a vector control unit including a speed/position estimation unit carrying out an operation to estimate a motor rotational speed... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20090267549 - Brushless motor controller and brushless motor: A brushless motor controller that controls a brushless motor by determining an energizing timing of a three-phase stator coil based on the rotational position and speed of a rotor. The controller includes a normal timing generation unit, an advancing timing generation unit, and a control switching unit. The normal timing... Agent: Sheridan Ross PC

20090267550 - Motor control device and generator control device: To estimate a fluctuation component of the torque generated at the motor accurately, a motor control device (3) which controls a motor with a stator having armature winding and a rotor having a permanent magnet is provided to include a torque fluctuation component estimation unit for estimating a torque fluctuation... Agent: Ndq&m Watchstone LLP

20090267551 - Steering control apparatus: A steering control apparatus includes a direct current power source, a three-phase alternating current motor, and a motor driving circuit. An emergency switching element is provided on at least two phases of a three-phase power supply line connected to the three-phase alternating current motor within the motor driving circuit, and... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090267548 - Switched reluctance motor and connection method for sensor shutter thereof: The present invention relates to a switched reluctance motor and a connection method for a sensor shutter thereof. The switched reluctance motor in accordance with the present invention includes a stator; a rotor rotating with respect to the stator centering around a rotational shaft; and a sensor shutter having a... Agent: Ked & Associates, LLP

20090267552 - Soft starting method and system thereof in the way of wave-skipping with stepped frequency and stepless voltage regulating for a motor: The invention relates to a soft starting method and system thereof in the way of wave-skipping with stepped frequency and stepless voltage regulating for a motor which can be applied to the large torque starting of AC motor under the condition of a power supply of a industrial frequency supply... Agent: Smith, Gambrell & Russell

20090267553 - Unknown: a contractor designed to supply power, in a prerotation first phase, only to the first winding (43) of the inductor coil and, in a full-speed second phase, following the first phase, to the first, second and third windings (41, 42) of the inductor coil.... Agent: Berenato, White & Stavish, LLC

20090267554 - Driving apparatus of electric motor for reduction roll: There is provided a driving apparatus of an electric motor for a reduction roll that can improve maximization of rolling performance and a speed decrease amount by making maximal use of torque that various electric motors can generate during material entry. The apparatus includes an upper electric motor speed controller... Agent: Sughrue Mion, PLLC

20090267555 - Harmonic torque ripple reduction at low motor speeds: Methods and systems are provided for reducing torque ripple in an electric motor. A method comprises receiving a torque command and determining a cancellation current command based on the torque command. The method further comprises generating a harmonic cancellation command based on the cancellation current command, wherein the harmonic cancellation... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090267556 - Fuel cell drive system: A motor system is configured by: detecting a duration of idle stop by an idle stop end state detection unit 101 when the idle stop mode of the fuel cell ends; estimating recovery time taken for total voltage of the fuel cell to reach voltage at the idle operation by... Agent: Foley And Lardner LLP Suite 500

20090267557 - Method of actuator control: The present invention is related to a method of controlling a device having a calibration process. The calibration process has a partial calibration routine and a calibration routine. A detector within the control system is capable of receiving one or more input signals and determining whether a partial calibration or... Agent: Philip R Warn Warn Partners

20090261761 - Working vehicle: A crawler type power shovel vehicle (1) operated by a hydraulic actuator (20), constructed from an electric motor (31) for driving a hydraulic pump (32) for supplying hydraulic oil to the hydraulic actuator (20), a battery (50) for supplying direct current power, an inverter (41) for operating the electric motor... Agent: Studebaker & Brackett PC

20090261763 - Method of detecting a useful signal: A method of detecting a useful signal from a measurement signal that is overlaid by at least one interference signal for use in a control or regulating device, where the interference signal occurs with at least one known interference signal frequency. The method including the steps of detecting the measurement... Agent: Davis & Bujold, P.l.l.c.

20090261764 - Motor drive device and electric equipment using this: A motor drive device (2) comprising an H-bridge circuit (21) having four switching elements (QH, QH2, DL1, DL2) connected in an H bridge form to a motor coil L, a control circuit (22) for on-off controlling each switching element, and a PWM signal generating circuit (23) for generating a PWM... Agent: Fish & Richardson P.C.

20090261762 - Drive device, hybrid vehicle equipped with the drive device, and control method for drive device: A drive device having at least one electric motor that inputs and outputs motive power includes: a plurality of capacitors; a plurality of relays for capacitors that connects and disconnects the motor and the capacitors; and a relay control device that controls the relays for capacitors. The relay control device... Agent: Oliff & Berridge, PLC

20090261765 - Synchronous motor, encoderless motor system and a method for operating an encoderless motor system with a synchronous motor: The invention relates to a synchronous motor (12) with a number of stator coils (15), with a rotor (16) with at least one permanent magnet (17), which induces a rotor magnetic field in a useful flux direction and with at least one coil winding (20), which is fitted on the... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20090261766 - Method for controlling an electric motor fed by a constant voltage supply system: Disclosed is a method for controlling an electric motor (10) fed by a constant voltage supply system (14, 20), especially a method for controlling a fan motor which is fed by a motor vehicle power supply system using pulse width modulation and which can be connected to the constant voltage... Agent: Michael J. Striker

20090261767 - Universal apparatus and method for configurably controlling a heating or cooling system: A system controller is disclosed that includes a communication means for transmitting and receiving information from an installed blower motor controller, and a removable memory device connected to the system controller. The removable memory device includes system parameter information stored thereon that relates to the particular heating or cooling system,... Agent: Harness, Dickey, & Pierce, P.l.c

20090261768 - System and method for adjusting pulse width modulation signals according to component temperatures in a computer: A computer-based method for adjusting pulse width modulation (PWM) signals according to temperatures of one or more computer components includes setting a frequency formula for a fan in a computer. The method further includes reading current temperatures of one or more components in the computer from a temperature measuring device.... Agent: PCe Industry, Inc. Att. Steven Reiss

20090261769 - Method for controlling fan speed: A method for controlling a fan speed is disclosed. The fan cools a CPU in a computer. The method includes defining a CPU-max-temp value of a CPU, such that the first fan speed is linearly enhanced with the increase of a real temperature value of the CPU, when the real... Agent: PCe Industry, Inc. Att. Steven Reiss

20090261770 - Controller for motor: A controller is provided for a permanent magnet field motor including two rotors concentrically provided around a rotating shaft and a phase changing device for changing an angle of relative displacement in a circumferential direction between two rotors to serve as a power source for driving driven wheels of an... Agent: Arent Fox LLP

20090261771 - Interpolator for a networked motion control system: An interpolator for a system, such as a motion control system, where a stream of values of at least a first command signal is communicated across a communications medium according to a predefined update rate. The integrator is configured to calculate at a higher rate relative to the update rate... Agent: Beusse Wolter Sanks Mora & Maire, P. A.

20090261772 - Advanced method for stepper motor speed determination: A method and apparatus for determining speed of a stepper motor. In one embodiment of the method, a first terminal of a first coil of the stepper motor is coupled to an input of a multibit digital-to-analog (A/D) convertor. The stepper motor's a rotor is rotated about an axis while... Agent: Campbell Stephenson LLP

20090261773 - Galvano motor and galvano motor system: A galvano motor 10 includes a motor shaft 1, a coil 5 which rotationally drives the motor shaft 1, and an encoder scale 6 which is joined to one end of the rotating shaft, the motor shaft 1 is configured so that a mirror 9 which is heavier than the... Agent: Canon U.s.a. Inc. Intellectual Property Division

20090261774 - 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 magnet is a variable magnet whose flux density is variable depending on... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090261775 - Permanent magnet motor start-up: Methods and apparatus are provided for startup of a permanent magnet alternating current (AC) motor. The method comprises the steps of detecting startup of the permanent magnet AC motor; detecting a mechanical oscillation of the permanent magnet AC motor when startup of the permanent magnet AC motor is detected; and,... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)