Electricity: motive power systems inventions 04/09

20090108778 - Mobile machine with one or more electric propulsion motors: A mobile machine may include one or more generator units, a plurality of electric propulsion motors, and a power-transfer system operable to transfer electricity from one or more of the generator units to one or more of the electric propulsion motors. The mobile machine may also include power-system controls that... Agent: Caterpillar/finnegan, Henderson, L.L.P.

20090108779 - Control unit of shape memory element actuator and method of controlling shape memory element actuator: At the time of start of usage, a voltage to be applied to a shape memory alloy wire 102 by a feedback control circuit 120 is set to a first voltage value (step S1), and at a limit resistance value detection step, (the feedback control circuit) measures a limit resistance... Agent: Scully Scott Murphy & Presser, PC

20090108780 - Method and system for controlling a power inverter in electric drives: Methods and systems for controlling a power inverter in an electric drive system of an automobile are provided. The various embodiments control the power inverter by, responsive to a commanded torque of the electric motor being below a first torque level, controlling the power inverter to set a switching frequency... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090108781 - Motor driving apparatus, brushless motor, and method for driving the same: A motor driving apparatus has first, second, and third positive-side driving transistors having drains which are supplied with a power supply voltage, first, second, and third negative-side driving transistors having sources which are grounded and drains which are connected to sources of the first, second, and third positive-side driving transistors,... Agent: Foley And Lardner LLP Suite 500

20090108782 - Brushless multiphase self-commutation control (or bmscc) and related inventions: Brushless Multiphase Self-Commutation Control (or BMSCC), also known as Real Time Emulation Control (or RTLC), is a contact-less means for powering any electric apparatus with “conditioned” or “re-fabricated” multiphase electrical excitation that is synchronized to the movement of the electric apparatus. BMSCC inherently phase-locks the frequency of excitation to any... Agent: Frederick William Klatt

20090108783 - Rotor orientation detection in brushless dc motors: In order to determine the orientation of the rotor of a brushless DC motor 100, a sequence of current pulses may be applied to the stator phases U, V, W by the respective drivers HS0, LS0, HS1, LS1 HS2, LS2. The current generated in the stator phases U, V, W... Agent: Townsend And Townsend And Crew, LLP

20090108784 - Motor control apparatus and motor system: In a motor control apparatus, apparatus all switching devices of all phases of an inverter are kept fixed at OFF in accordance with a value of an all-OFF control pulse signal Poff outputted by a pulse generator. The pulse generator generates at least twice a pulse causing an induced voltage... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090108785 - Ac-input type brushless dc motor and electric appliance mounting the same: In an AC-input type brushless DC motor, a current control circuit controls an average current of an inverter circuit, a current indication circuit makes addition or subtraction, with respect to a reference current value, to the average current to be supplied to the inverter circuit such that the average current... Agent: Ratnerprestia

20090108786 - Motor protection device and method: A motor protection device includes a detection unit for detecting an operating state of a motor and outputting a detection signal; a reference unit for generating a variable reference signal; a discriminating unit for comparing the detection signal with the variable reference signal to discriminate whether the motor is in... Agent: Bacon & Thomas, PLLC

20090108787 - Motor driving system: The present invention relates to a motor driving system. The motor driving system includes a motor, a transmission member, a follower member, a position-detecting light emitter, a position-detecting light receiver, and a positioning-status sensing element. The positioning-status sensing element includes a plurality of notches or openings. The positioning-status sensing element... Agent: Kirton And Mcconkie

20090108788 - Method and system for operating windshield wipers: Methods and systems for operating a wiper for removing material impacting a surface of a vehicle are provided. An event indicating that the material has stopped impacting the surface of the vehicle is detected. A first number of wipe cycles are performed with the wiper if movement of the wiper... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090108789 - Programmable motor drive: A system comprises host logic and a programmable motor drive coupled to the host logic and configured to drive a motor. The programmable motor drive comprises a plurality of H-bridge circuits and the programmable motor drive is programmable to cause any two or more H-bridge circuits to be operated in... Agent: Hewlett Packard Company

20090108790 - Control structure of an electric fan: An electric fan includes a motor driving circuit, a controller, and a stepless speed-change device; the motor driving circuit is electrically connected to a blades-driving motor of an electric fan as well as a power circuit; the controller is electrically connected to the motor driving circuit while the stepless speed-change... Agent: Rosenberg, Klein & Lee

20090108791 - Motor control apparatus: At an initial drive operation after turning on of an electric power source, an ECU sequentially changes each current exciting phase among multiple phases through one complete cycle at a predetermined time schedule, so that a rotational position of a rotor and the corresponding exciting phase coincide with each other... Agent: Nixon & Vanderhye, PC

20090108792 - Method and system for eliminating external piercing in nc cutting of nested parts: This invention pertains to machinery and methods for cutting a workpiece utilizing a cutting tool into at least two parts having prescribed shapes from a metal plate comprising the steps of: identifying each of the parts by one or more contour lines; cutting a workpiece along one of the identifying... Agent: Lathrop & Gage Lc

20090108793 - Method for controlling a holding force against, and limiting impact with travel limit positions: An actuator includes a motor operated by a controller through a pulse width modulation drive signal applied to a drive circuit that drives the motor. The actuator has an output shaft connected to a coupling structure for manipulating a device such as a variable geometry turbine (VGT) or an exhaust... Agent: Delphi Technologies, Inc.

20090108794 - Control device and corresponding control method for a boost converter in a motor drive system: A boost converter boosts a DC voltage of a DC power supply. An inverter converts the output voltage of the boost converter into an AC voltage. An AC motor is driven by the output voltage of the inverter. A control device which controls the boost converter reduces an output voltage... Agent: Oliff & Berridge, PLC

20090108795 - Apparatus and method for starting and stopping an ac induction motor: An apparatus (10) for controlling the starting and stopping of an AC induction motor, the apparatus (10) comprising: a first magnetic permeable portion (20) having first (21), second (22) and third legs (23); a second magnetic permeable portion (40) arranged relative to the first magnetic permeable portion (20) such that... Agent: Sonnenschein Nath & Rosenthal LLP

20090108796 - Starting control apparatus and method for motor: An apparatus and method for controlling starting of a motor are disclosed. An exciting coil of a motor is excited by using a controller of an electronic refrigerator without having an extra excitation control circuit, to thereby simplify a component construction for controlling exciting of the motor and thus reduce... Agent: Mckenna Long & Aldridge LLP

20090108797 - Method for driving an asynchronous motor and pump arrangement with asynchronous motor: A method for driving an asynchronous motor operated at an adjustable three-phase frequency to a predetermined target rotational speed is disclosed. For controlling the asynchronous motor in an operating range around its breakdown point a current rotational speed of the asynchronous motor is determined at predetermined intervals and the three-phase... Agent: Hayes Soloway P.C.

20090108798 - Method and system for controlling pulse width modulation in a power inverter in electric drives: Methods and systems for controlling a power inverter in an electric drive system of an automobile are provided. The various embodiments control the power inverter by, responsive to either a commanded torque of the electric motor being above a first torque level, or a commanded speed of the electric motor... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090102402 - Controlled electric motor arrangement for a tension mechanism: P

20090102403 - Vcm control circuit: A method of controlling a moving part of a voice coil motor to move from an first position to a second position, wherein the position of the moving part is controlled by the level of an electrical signal applied to a coil of the voice coil motor, a first level... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, P.C.

20090102404 - Control circuit for an electromotor with electronic brake switch: The invention relates to a control circuit for controlling a DC voltage power supply, whereby the control circuit comprises a switching element connected in series to the motor and a bypass switch connected in parallel to the electromotor for braking the electromotor by means of bypassing, with the bypass switch... Agent: Banner & Witcoff, Ltd.

20090102405 - Motor controller of air conditioner and method of the motor controller: The present invention relates to a motor controller for an air conditioner and a motor control method. The motor controller including a converter converting AC utility power into DC power and an inverter having a plurality of switching elements, the inverter receiving the DC power, converting the received DC power... Agent: Mckenna Long & Aldridge LLP

20090102406 - Motor control circuit, fan motor, electronic device, and notebook personal computer: A motor control circuit comprising: a rotation control circuit configured to control rotation of a motor based on a rotation control signal for controlling rotation of the motor and a rotational position detection signal from a Hall element for detecting a rotational position of the motor; a determining circuit configured... Agent: SocalIPLaw Group LLP

20090102407 - Power tool, drive assembly, and method of operating the same: A power tool including a drive assembly including a first clutch assembly having an engaged configuration, in which the first clutch assembly transfers a drive force from a motor shaft to a spindle, and a disengaged configuration, in which the first clutch assembly prevents the transfer of the drive force.... Agent: Michael Best & Friedrich LLP

20090102408 - Backward pedaling detection circuit for e-bike motor driver: A backward pedaling detection circuit has a charging/discharging circuit for charging and discharging the external capacitor to meet the threshold voltage required by the hysteresis comparator, based on the input from the hall sensor. An internal pull-down circuit, based on the pedal speed, keeps the circuit from false triggering. A... Agent: Greenblum & Bernstein, P.L.C

20090102409 - Control device with learning function for electric motors: A control device for electric motors, capable of precisely moving one object by using two electric motors based on periodically repeated commands. The control device includes a first learning controller for calculating an amount of correction so that a positional deviation of a first electric motor is minimized, and a... Agent: Lowe Hauptman Ham & Berner, LLP

20090102410 - Machine tool, production machine and/or robot: A machine tool, production machine or robot includes an electric motor with a memory, and a device for open-loop and/or closed-loop control of the electric motor. The device can determine operating data of the motor, transfer the operating data to the memory, and store the operating data in the memory.... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20090102411 - System and method for jerk limited trajectory planning for a path planner: A system for generating a motion profile in real time includes a processor. The processor breaks a move into a first phase and a second phase. The first phase includes commanding the move toward a constant velocity segment, and the second phase comprises calculating a jerk value required to successfully... Agent: General Electric Company Ge Global Patent Operation

20090102412 - Motor controller and method of controlling the motor: The present invention relates a motor controller and a motor control method of controlling a motor having a stator coil and a rotator. The motor controller includes: an activating operator receiving an operation command with a prescribed target frequency while the motor remains stationary, activating the motor at a prescribed... Agent: Mckenna Long & Aldridge LLP

20090102413 - Electromechanical flight control system and method for rotorcraft: Flight control systems and methods for rotorcraft are provided. The flight control system includes a user input device and a motor in operable communication with the user input device. The motor includes a plurality of winding sets and an armature coupled to the plurality of winding sets. The armature includes... Agent: Honeywell International Inc.

20090096394 - Rotary electric system with star-connected multiphase stator windings: In a rotary electric system, a switch member includes at least one of a first switch and a second switch. The first switch is connected between a neutral point of multiphase stator windings and a high-side electrode of a direct current power source. The second switch is connected between the... Agent: Nixon & Vanderhye, PC

20090096395 - Motor drive device: The present motor control device detects from the speed of a motor and a current driving the motor that the motor is overloaded, and exerts control to set a target torque based on the detected overload state of the motor to cause the motor to output a maximal torque that... Agent: Sughrue Mion, PLLC

20090096396 - Method for determining the rotor position of a separately excited rotating electrical machine: A method is specified for determining the rotor position of a separately excited rotating electrical machine which machine has a stator winding set and a rotor winding set and in which method the stator winding set is fed from an associated converter unit, and the rotor winding set is fed... Agent: Buchanan, Ingersoll & Rooney PC

20090096397 - Relating to driving brushless dc (bldc) motors: In a three phase BLDC motor the rotor position is monitored by detecting the zero crossing points of the induced back EMF signals BEMF_U, BEMF_V, BEMF_W in the phase windings U, V, W. As they are illustrated, the back EMF signals are substantially sinusoidal but they may in other situations... Agent: Townsend And Townsend And Crew, LLP

20090096398 - Robust blower motor startup technique: A method for starting a blower motor with a locked rotor condition, the motor having one or more speed settings, each speed setting having a reference voltage and reference current value associated therewith, the method comprising, from a motor off condition, applying the reference voltage to the motor, the reference... Agent: Brooks Kushman P.C./fgtl

20090096399 - Intelligent motorized appliances with multiple power sources: A motorized portable appliance which monitors, and automatically selects, one of multiple power sources. The motorized portable appliance includes an electric motor, a secondary battery and at least one other source of electrical power, and an automatic control to switch between the secondary battery and the other source of electrical... Agent: Cook Alex Ltd

20090096400 - Starter relay control: A starter control system includes a power source, a starter motor, a starter relay, a control module, and an ignition switch. The starter motor is in operative communication with the power source. The starter relay is operatively interposed between the power source and the starter motor, and includes a high... Agent: Alleman Hall Mccoy Russell & Tuttle, LLP

20090096401 - Power tool: The controller determines the presence or absence of operation of the trigger switch according to an ON/OFF state of the main contact of the trigger switch and designating the rotation speed of the motor based on a signal outputted from the speed contact. The controller stops the rotation of the... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20090096402 - Motor drive device and cooling device using the same: A drive circuit of a fan motor is provided. In an embodiment of the drive circuit, a first PWM comparator compares a temperature detection voltage with a cyclic voltage, and outputs a first PWM signal. A second PWM comparator compares a minimum frequency setting voltage indicating a minimum frequency of... Agent: Cantor Colburn, LLP

20090096403 - Motor control: A method of controlling a current of a three-phase electric motor with a three-phase controller. The firing angles are adjusted so as to leave a range of firing angles in which DC components appear.... Agent: Venable LLP

20090096404 - Determination of the position of a component: m

20090096406 - Method and system for determining the reliability of a dc motor system: A method and system for determining the reliability and a remaining time before failure for a DC motor system is provided. The method and system may determine the reliability and a remaining time before failure with a statistical confidence. The method and system may includes acquiring historical motor data, obtaining... Agent: Ge Energy General Electric C/o Ernest G. Cusick

20090096407 - Method and system for remotely determining the reliability of a dc motor system: A method and system for remotely predicting the reliability and the remaining time before failure for an DC motor system is provided. The method and system may remotely determine the reliability utilizing a DC motor condition forecaster. The method and system may include acquiring historical motor data, obtaining operational data,... Agent: Ge Energy General Electric C/o Ernest G. Cusick

20090096405 - Method and system for remotely predicting the remaining life of an ac motor system: A method and system for remotely predicting the reliability and the remaining time before failure for an AC motor system is provided. The method and system may remotely determine the reliability and a remaining time before failure with a statistical confidence utilizing an AC motor condition forecaster. The method and... Agent: Ge Energy General Electric C/o Ernest G. Cusick

20090096408 - Frequency converter: The present invention relates to a frequency converter comprising electric power supply devices for supplying electric power to an electric motor (26) to be connected to the frequency converter, a controller configured to control the electric power supply. In order to control the electric power supply, the frequency converter comprises... Agent: Buchanan, Ingersoll & Rooney PC

20090091275 - Adaptive drive system using current values for a personal care appliance: An adaptive system for a personal care appliance, such as a power toothbrush, having a workpiece which is driven through an amplitude of motion by a drive mechanism which includes a stator member includes a circuit (13) for measuring average electrical current through the stator member and stored information (19)... Agent: Philips Intellectual Property & Standards

20090091276 - Linear motor and method for operating a linear motor: A linear motor includes a primary part arranged as a guideway stator and at least one secondary part that is movable with respect to the primary part, the at least one secondary part having device(s) for controlling the generation of a magnetic field, causing its motion, in the primary part.... Agent: Kenyon & Kenyon LLP

20090091277 - Dust extractor for a battery-operated electric hand-held power tool: A dust extraction module (4) for a battery-operated electric hand-held power tool (2a, 2b) includes a fan wheel (5), a DC motor (6) for driving the fan wheel (5), and a DC chopper converter (7) arranged upstream of the DC motor (6) and connectable with a battery module (3a, 3b)... Agent: Abelman, Frayne & Schwab

20090091278 - Downhole load sharing motor assembly: A motor assembly of multiple motors for use in driving a shared downhole load within a well. In particular, the assembly may employ substantially constant adjustable speed motors. These may include permanent magnet synchronous machine motors. The motors may be configured to operate at given speeds that may be downwardly... Agent: Schlumberger Ipc Attn: David Cate

20090091279 - Control unit for an electric motor, in particular for a fan motor: The invention provides a control unit for at least one electric motor, wherein the control unit performs open-loop or closed-loop control of the motor speed of the electric motor in such a way that in the case of control values in specific ranges which are typical of a fault when... Agent: Marshall, Gerstein & Borun LLP

20090091280 - Stochastic anti-windup proportional-integral (pi) controller: Different circuit-based implementations of stochastic anti-windup PI controllers are provided for a motor drive controller system. The designs can be implemented in a Field Programmable Gate Arrays (FPGA) device. The anti-windup PI controllers are implemented stochastically so as to enhance the computational capability of FPGA.... Agent: Akerman Senterfitt

20090091281 - Motor driving apparatus: A motor driving apparatus having a converter, which receives AC voltage and converts it to DC power, and an inverter, which receives the DC power and converts it to AC power, includes a charge/discharge control circuit and a capacitor connected in parallel to a link section between the converter and... Agent: Lowe Hauptman Ham & Berner, LLP

20090091282 - Electric motor control: A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The system includes aspects which permit, among other things, electromagnetically disconnecting a failed permanent magnet motor from said system, weight savings in motor control electronics, controllability benefits and other benefits.... Agent: Ogilvy Renault LLP (pwc)

20090091284 - Motor control apparatus: A P-range side delimiting position of a movable range of a range change mechanism is learned by rotating a motor to a corresponding rotational position, which corresponds to the P-range side delimiting position. A climb correction amount is set for a learning value of the P-range side delimiting position to... Agent: Nixon & Vanderhye, PC

20090091283 - Servo control apparatus for a linear motor: A servo control apparatus for a linear motor comprises a position feedback device, a driver and a position compensating device that are connected with one another. The servo control apparatus is electrically connected to the linear motor. By such arrangements, it can not only improve the precision of the displacement... Agent: Dr. Banger Shia

20090091285 - Electronic control device of an electrical drive system with redundant disconnection device: In normal mode, a central unit of an electronic control device receives desired and actual values for determining desired current values which are transmitted to an electronic drive unit. The central unit of the electronic drive unit receives the desired current values for determining drive signals for circuit breakers. In... Agent: Siemens Corporation Intellectual Property Department

20090091286 - Robot operating range setting device: A robot control unit (30) comprises: a setting means (40) for setting operating ranges of each shaft and a working tool of the robot (20); a storage means (33) for storing an inertial running distance of the robot decided by at least one of the operating speed of the robot... Agent: Drinker Biddle & Reath (dc)

20090091287 - Linear actuator: A linear actuator comprising a spindle nut, where the spindle nut and the spindle between a first and a second point, indicating the length of stroke, can move axially in proportion to each other, depending on whether the spindle or the spindle nut is being driven around via the transmission,... Agent: Dykema Gossett PLLC

20090091288 - Return-to-zero control method for a stepper motor: In a return-to-zero stepping sequence for a stepper motor that drives the pointer of a gauge, steps that could potentially cause the pointer to flutter are modified. At least the initial potential flutter step of the stepping sequence is divided into sub-steps to progressively attenuate the motor torque, the motor... Agent: Delphi Technologies, Inc.

20090091289 - Stator inter-turn fault detection of synchronous machines: A fault detection system using field current and rotor search coil voltage harmonics is provided. The technology is capable of detecting an inter-turn fault unambiguously and rapidly in a synchronous machine. The internal asymmetry of the machine that has adversely affected the earlier fault diagnosis results has, for the first... Agent: Klarquist Sparkman, LLP

20090085505 - Electric drive unit: Electric drive units comprising a common active part having a stator and a rotor, which has windings and/or permanent magnets for a drive function and an energy transmission function, enable the rotor winding that is provided for energy transmission to be used to allow position detection at a low additional... Agent: Siemens Corporation Intellectual Property Department

20090085506 - Fan driving system with safe driving current switching: An exemplary fan driving system includes a driving device and a MOSFET group. The driving device includes a first adjustable resistor connected between its first voltage signal input terminal and ground, and a second adjustable resistor connected between its second voltage signal input terminal and ground. The MOSFET group includes... Agent: PCe Industry, Inc. Att. Steven Reiss

20090085507 - Simulated encoder pulse output system and method: The invention includes a system and method for generating simulated encoder outputs in a control system. An output pulse width between reference position inputs is computed, the output pulse width being based upon a difference between an updated reference position input and a previous reference position input, and upon a... Agent: Fletcher Yoder Law (for Rockwell Automation)

20090085508 - Motor controller, control system, and control method: A motor controller includes a reference signal generator; an A/D converter performing A/D conversion of the cosine and the sine signals outputted from a resolver; a first amplitude calculator calculating cosine and sine signal amplitudes based on twice-A/D converted cosine and sine signals respectively; a second amplitude calculator calculating averages... Agent: Pearne & Gordon LLP

20090085509 - Stepper motor device with compensating non-sinusoidal driving values and method of producing the driving values: A stepper motor device uses compensating non-sinusoidal driving values to compensate for operational non-sinusoidal drive characteristics of a motor of the device due to at least design and manufacturing imperfections in the motor. The compensating non-sinusoidal driving values may be derived using back electromagnetic force produced from the motor or... Agent: Thomas H. Ham Wilson & Ham

20090085510 - Motor drive using flux adjustment to control power factor: The switching rectifier and switching inverter on a motor drive unit are modulated to indirectly change the magnitude of current and voltage stored in DC link by controlling the magnetic field of the motor to correct for both power factor lead and power factor lag over a wide range of... Agent: Rockwell Automation, Inc./bf

20090085511 - High temperature superconducting electromechanical system with frequency controlled commutation for rotor excitation: A system and method for generating a magnetic field in a rotating machine. In one embodiment, a primary winding assembly is configured to generate a rotatable magnetic field. The assembly is connected to receive multiple signals of different phases to effect field rotation. A set of secondary windings is positioned... Agent: Beusse Wolter Sanks Mora & Maire, P. A.