Electricity: motive power systems inventions

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)

20090256502 - Battery management system for a cordless tool: A hand-held, battery powered tool (e.g., nutrunner, drill) includes an output head operatively connected to a motor, a plurality of battery cells, an ON/OFF start switch, a resistance sensor that measures a resistance of the output head to movement, and a controller. When the start switch is ON and the... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20090256503 - Motor control apparatus and electric power steering system: If the magnitude of a command voltage vector is greater than a predetermined voltage value indicated by a voltage limit circle, the magnitude of a voltage vector, which corresponds to a q-axis current and which forms the command voltage vector, is adjusted so that the magnitude of the command voltage... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090256504 - Motor drive device: A motor drive device for alternately driving a plurality of motors includes a position detection signal processing circuit for processing position detection signals of the plurality of motors, a pre-drive circuit for generating an excitation switching signal of the motors, a plurality of power switching circuits for supplying an electric... Agent: Ratnerprestia

20090256505 - Synchronous motor and control method of synchronous motor: A synchronous motor including therein a three-phase inverter and position sensors, having a unit for calculating a digital input current value from the analog output of an input current detection circuit that detects the input current flowing into the DC input terminal of the three-phase inverter, and a digital feedback... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090256506 - Drive device for synchronous electric motor: Switching elements are driven by a control signal outputted from a control circuit, so that a rotating magnetic field is generated from a stator coil to rotate a rotor of a synchronous electric motor. The control signal is generated through use of a selected modulation scheme, which is selected from... Agent: Posz Law Group, PLC

20090256508 - Electronically commutated motor: An electronically commutated motor (20) has a rotor (28) and a rotor position sensor (30), which sensor, during operation, furnishes a rotational position signal (34). A stator interacts with the rotor (28). The stator has a stator winding strand (26) in an H bridge (22), and a control apparatus (36)... Agent: Oliver Intellectual Property LLC

20090256507 - Method for operating sensorless and brushless motors: A method of aligning a sensorless brushless polyphase DC motor including aligning a rotor to a known stopped position with respect to at least one coil during a shut-down of said motor wherein a voltage is applied to one or more coils in a timed sequence of voltage application steps;... Agent: Tung & Associates

20090256509 - Motor control device: A motor control device has a three-phase bridge circuit, a driving circuit, and a microcomputer. The three-phase bridge circuit has three pairs of MOSFETs for U, V, and W phases of a three-phase AC motor as a control target. The microcomputer has a dead time set value storage unit and... Agent: Nixon & Vanderhye, PC

20090256510 - Reliable drive cut off device: A protective device enables reliably cutting a drive region off the power supply of a guided vehicle. The drive region is connectible to the power supply via at least one drive region switch and it comprises stator sections that are strung together. The sections are connectible to a drive region... Agent: Lerner Greenberg Stemer LLP

20090256511 - Direct flux regulated permanent magnet brushless motor utilizing sensorless control: A permanent magnet rotor for use in a flux regulated permanent magnet brushless machine is constructed such that the inductance along the direct and quadrature axes is markedly different to provide sensorless position feedback for the rotor.... Agent: Carlson, Gaskey & Olds, P.C.

20090256512 - Plurality of configurable independent compute nodes sharing a fan assembly: A system comprising a chassis that includes a plurality of modules and a fan assembly disposed in a distal end of the chassis for drawing air in parallel pathways through the plurality of modules. At least one of the modules is a compute module having a thermal sensor disposed to... Agent: Ibm Corporation (ss/nc) C/o Streets & Steele

20090256513 - Power output apparatus, vehicle equipped with power output apparatus, and control method of power output apparatus: A hybrid electronic control unit sends a combustion start command to an engine ECU when the rotation speed of an engine reaches a combustion start rotation speed by engine cranking. The engine ECU sends an initial explosion advance notification to the hybrid electronic control unit when the crank position of... Agent: Oliff & Berridge, PLC

20090256514 - System for suppressing wheel acceleration after a slip: A power system having a DC electric motor is disclosed. The DC electric motor may include an armature and a field coil electrically connected in series with the armature, the field coil having an input and an output. The power system may also include an additional electrical path. Additionally, the... Agent: Caterpillar/finnegan, Henderson, L.L.P.

20090256515 - Method of detecting state of synchronization loss in stepping motor: In a method of detecting synchronization loss in a stepping motor, a means for applying either control current or control voltage to a coil of each phase to thereby drive a stepping motor and a means for individually measuring a back EMF voltage induced at the coil of each phase... Agent: Oliff & Berridge, PLC

20090256516 - Electromechanical machine control system: The electromechanical machine control system includes a current coordinate transformer (15) for coordinate transforming a current detection value of the electromechanical machine (13) which is inputted into a γ-axis current having the same phase as a position reference and a δ-axis current which advances 90 degrees further than the position... Agent: Sughrue-265550

20090256517 - Weighted field oriented motor control for a vehicle: A system for transitioned field oriented motor control is described. The system may include a module using a current-based algorithm to estimate flux and a module using a voltage-based algorithm to estimate flux. A weighting module operates over a transition range to transition between the flux estimate using the current-based... Agent: Schwegman, Lundberg & Woessner, P.A.

20090256518 - Vector control device of induction motor, vector control method of induction motor, and drive control device of induction motor: The vector control device includes: secondary magnetic flux command computing means (40) for computing a secondary magnetic flux command to an induction motor (6) by taking a maximum voltage that an inverter (4) can generate into account on a basis of a torque command from an external, a DC voltage... Agent: Buchanan, Ingersoll & Rooney PC

20090256519 - System, method and program product for cable loss compensation in an electrical submersible pump system: An electrical submersible pumping (ESP) system can include a pump located in a wellbore, a motor attached to the pump, a power source located at the surface, a cable electrically coupling the power source and the motor, and a current sensor. The ESP system can also include a controller communicating... Agent: Bracewell & Giuliani LLP

20090251080 - Dc motor with directionally determined torque: A device and method for matching the rates of speed at which an electric motor that is drivingly connected to a worm gear raises and lowers a window in an automobile power window assembly. By axially displacing the motor's armature, and/or by varying the thread and tooth profiles of the... Agent: Kremblas, Foster, Phillips & Pollick

20090251081 - Electric motor drive employing hybrid, hysteretic/pulse-width-modulated dynamic braking: A dynamic braking circuit for an electronic motor drive shunts the DC link of the drive with a resistor using two control strategies. The first control strategy used for lower levels of braking employs a pulse width modulated signal and the second control strategy used for higher levels of braking... Agent: Rockwell Automation, Inc./bf

20090251082 - Controller for ac rotary machine: A controller for an AC rotary machine is proposed, by which a stable rotation angular-frequency estimate value can be obtained even in an extremely low speed region of the AC rotary machine, and consequently stable control can be performed. A controller for an AC rotary machine has an angular-frequency estimate... Agent: Buchanan, Ingersoll & Rooney PC

20090251083 - Control apparatus for ac rotary machine: A control controls starting of an AC rotary machine by calculating a resistance drop component, corresponding to a resistance drop of the AC rotary machine, based on a detection current, and adjusts angular frequency of an AC output voltage based on subtracting the resistance drop component from a voltage command,... Agent: Leydig Voit & Mayer, Ltd

20090251084 - Electronically commutated motor: An electronically commutated motor (ECM 20) has a rotor (28) and a stator, associated with which is a winding arrangement (26) to which electrical current (i1) is applied to drive the motor (20), a computer (36), and a PWM generator (84) associated therewith. The motor (20) is designed for operation... Agent: Oliver Intellectual Property LLC

20090251085 - Method and system for motor oscillatory state detection: Method and system for motor oscillatory state detection. According to various embodiments, the present invention presents a method for determining whether a motor is in an oscillatory state. The method includes powering up a motor for a period of time and then monitoring the movement of the motor during a... Agent: Townsend And Townsend And Crew, LLP

20090251086 - 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 (20) and outputs a rectified voltage having pulses from both ends of... Agent: Birch Stewart Kolasch & Birch

20090251087 - Motor controller: A motor controller supplies power to a motor and drives the motor, the motor including a position detector. The motor controller includes a velocity control unit which generates a torque instruction by using a velocity instruction and a velocity signal; a correction processing unit which Fourier-transforms the torque instruction, extracts... Agent: Ditthavong Mori & Steiner, P.C.

20090251088 - Motor driving circuit: A motor driving circuit includes at least one set of switching elements, each set of switching elements being two switching elements connected in series to each other, and a diode connected in parallel with one of the two switching elements connected on a power source side, a terminal of a... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090251089 - Systems and methods for detecting angular position: Methods and systems for detecting an angular position of an electric motor are disclosed, including sending an electrical pulse through a stator coil of the electric motor, determining an approximate angular position of a rotor of the electric motor in response to detecting an timing of a returning electrical pulse... Agent: Continental Automotive Systems Temic Automotive Of North America, Inc.

20090251090 - Drive system for electrically driven dump truck: A drive system for an electrically driven dump truck is capable of preventing a prime mover from stalling and is also capable of enabling electric motors for traveling to make full use of the output horsepower of the prime mover up to an output limit of the prime mover. The... Agent: Mattingly & Malur, P.C.

20090251091 - Sample stage apparatus and method of controlling the same: The present invention provides a stage apparatus capable of reducing a positioning time without increasing a positional deviation. A positioning control method of a sample stage apparatus includes: a high-speed movement step of moving a table to a high-speed movement target position at a first movement speed; a positional deviation... Agent: Mcdermott Will & Emery LLP

20090251092 - Position controller: A position controller includes a position control part that calculates a speed command on the basis of a difference between a position command and a rotation position of a motor, a PI control part that calculates a torque command on the basis of a speed difference between the speed command... Agent: Ditthavong Mori & Steiner, P.C.

20090251093 - Motor control apparatus: A velocity control loop of a motor control apparatus including a notch filter. The notch filter attenuates a signal component at a central frequency from a motor driving command, and outputs the attenuated motor driving command. The driving of a motor is controlled based on the attenuated motor driving command.... Agent: Sughrue Mion, PLLC

20090251094 - Hysteresis mitigation and control method: A system and control method mitigates hysteresis of an adjustable component in the system. A control module can allow small control changes to be effected to the component within limits of the component's and/or the system's normal hysteresis band. The control method can allow finer, more accurate and more aggressive... Agent: Harness, Dickey & Pierce, P.L.C

20090251095 - Motor driven electronic apparatus: A driving method of a high speed rotation stepping motor exhibiting good starting performance, its driving circuit, and a vibration motor and a fan motor employing them. The motor driven electronic apparatus comprises a two pole flat stator, a rotor consisting of a two pole permanent magnet coupling magnetically with... Agent: Mcginn Intellectual Property Law Group, PLLC

20090251096 - Method and apparatus for torque ripple reduction: Methods and apparatus are provided for reducing torque ripple in a permanent magnet motor system comprising a permanent magnet motor coupled to an inverter. The method comprises the steps of receiving a torque command, generating a torque ripple reduction signal in response to the torque command, modifying operational control signals... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)