Electricity: motive power systems inventions 02/08

20080048591 - Power steering apparatus: A power steering apparatus includes an electric motor, a temperature sensor, and a control unit. The electric motor produces an assist steering effort in a steering system. The temperature sensor measures a temperature of a first portion subject to thermal influence of operation of the electric motor. The control unit... Agent: Foley And Lardner LLP Suite 500

20080048592 - Motor control device: A motor control device has a target speed generating unit for generating a generated target rotational speed, speed detecting units for detecting rotational speeds of each of the plurality of motors, an average speed calculating unit for averaging the detected rotational speeds of each of the plurality of motors to... Agent: Osha Liang L.L.P.

20080048593 - Brushless motor: In the m phase brushless motor, n (n<m) phase magnet coil groups are provided with magnetic sensors, while the remaining (m−n) phase magnet coil groups are not provided with magnetic sensors. The drive control circuit utilizes the sensor outputs of the n magnetic sensors to generates n sets of drive... Agent: Harness, Dickey & Pierce, P.L.C

20080048594 - Method for managing transitions in a three-phase bldc motor and corresponding device: A method is provided for managing at least one transition in a three-phase BLDC motor describing a cycle including six successive states, wherein the motor obtains first, second and third synchronisation signals. The synchronisation signals are respectively associated with first, second and third coils of the motor. The method includes... Agent: Westman Champlin & Kelly, P.A.

20080048595 - Active brake for spindle motor: A reverse torque, forward commutation motor driver system for a phased motor rapidly decelerates or “brakes” the motor by exciting, in sequence, a complementary excitation signal in each normal commutation state of the forward state machine, thereby providing an active braking effect. After active braking reduces the rotational velocity of... Agent: Hensley Kim & Holzer, LLC

20080048596 - Electric braking apparatus and method of controlling thereof: An electric braking apparatus having a conversion mechanism for generating a force for pressing or separating a brake friction member based on a rotational torque generated by an electric motor, wherein a rotor angle position state of the electric motor and a brake process of the brake friction member which... Agent: Crowell & Moring LLP Intellectual Property Group

20080048597 - Motor driving device and motor braking method: A motor driving device includes a brake mode control section for starting, when a brake instruction for a motor, braking of the motor in a reverse brake mode and then switching the reverse brake mode to a short brake mode; a cycle start detection section for receiving a rotation signal... Agent: Mcdermott Will & Emery LLP

20080048598 - Brushless motor driving device, brushless motor starting method, and method of detecting rotor stop position of brushless motor: When starting a brushless motor, if the stop position of the rotor is detected between time t1 and time t2, a start-up excitation pattern in accordance with the rotor stop position is input for an initial energization time Ts1. Afterward, when the energization is stopped, a plurality of signals SL1,... Agent: Kenyon & Kenyon LLP

20080048599 - Signal conditioning apparatus and method for determination of permanent magnet motor rotor position: An apparatus and method for estimating rotor angle information for the control of permanent magnet AC motors having sinusoidal current excitation. The disclosed motor drive can provide full load operation at very low speeds including zero speed without the use of a shaft position sensing device. The rotor angle is... Agent: Ostrolenk Faber Gerb & Soffen

20080048600 - Circuit to momentarily increase the peak torque of a dc motor: A motor control circuit for supplying power to a DC motor which drives a mechanism having a driven shaft, the control circuit having a parallel combination of a capacitor and switch in series with the DC motor. When the movement of the driven shaft is obstructed, the motor driver and... Agent: Delphi Technologies, Inc.

20080048601 - System and method for determining barrier motor parameters without using sensors: This invention deals with a barrier operator system comprising a direct current (dc) motor coupled to a barrier, where the dc motor is driven by a string of voltage pulses. The system has a barrier operator that is programmed to determine various qualities including the speed of the motor from... Agent: Fitch Even Tabin And Flannery

20080048602 - Vehicle drive: In an electric or hybrid vehicle drive having an electric machine, which can be operated either as a motor or as a generator, and includes an electronic power system, wherein a power source is connected to a direct voltage terminal of the electronic power system, and the electric machine is... Agent: Klaus J. Bach

20080048603 - Integrated control and diagnostics systems: An integrated control and diagnostics system for a controlled system (e.g., a motor) includes a diagnostics module and a controller coupled to the motor. To optimize operation, the diagnostics information signal is used to modify the control provided by the controller as required. Moreover, the output of the control module... Agent: Rockwell Automation, Inc./(at)

20080048604 - Motor control amplifier: A motor control amplifier for position feedback control is provided utilizing the inherent inductor and/or resistor dynamics of the motor. The motor control amplifier applies a voltage to the motor equivalent to the electrical motor resistance multiplied by the current of the motor, canceling out the electrical motor resistance, and... Agent: Lumen Intellectual Property Services, Inc.

20080048605 - Switching device for linking various electrical voltage levels in a motor vehicle: Switching device for linking various electrical voltage levels in a motor vehicle, in which a drive voltage level has an electric drive machine which may be actuated by a power converter, and a drive energy accumulator which is associated with an intermediate circuit, and in which the drive voltage level... Agent: Crowell & Moring LLP Intellectual Property Group

20080048606 - Vector controller for a permanent magnet motor and inverter module: In a system in which current is detected in an inexpensive manner or in a system in which a position detector is omitted, the present invention provides a high-efficiency vector controller for a permanent magnet motor that can minimize current at the same torque even when there is setting error... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080048607 - Vector controller of induction motor: Provided is a vector control apparatus for an induction motor which is capable of obtaining stable rotation in a short period of time for adjustment even at the time of low-speed operation by increasing the SN ratio of an output voltage to suppress the arithmetic error in the primary angular... Agent: Buchanan, Ingersoll & Rooney PC

20080042601 - Electrical generator: An electrical generator utilizes power produced by falling weights. Falling weights are connected to long arms which turn a shaft. The shaft, through a series of gears, provides power to the generator.... Agent: Hoffman, Wasson & Gitler, P.C.

20080042602 - Locomotive wheel speed control: A method for controlling a wheel speed of a locomotive includes determining an estimated wheel speed (52) for a desired wheel set of a locomotive responsive to a locomotive operating parameter indicative of an actual wheel speed of the desired wheel set. The method also includes generating a first adjustment... Agent: Beusse Wolter Sanks Mora & Maire, P.A.

20080042603 - Cooling-fan rotation-speed control circuit: The present invention discloses a cooling-fan rotation-speed control circuit, wherein a plurality of sets of input power sources respectively having different voltages is electrically and parallel coupled to a cooling fan; a switch is installed between at least one input power source and the cooling fan; the switch is turned... Agent: Birch Stewart Kolasch & Birch

20080042604 - System and method for controlling a motor using forced speed control: A system and method for operating a motor drive unit. The motor drive unit is coupled to a motor driving a load and is configured to selectively control the motor according to a torque control mode and a speed control mode. The motor drive unit includes a circuit configured to... Agent: Rockwell Automation, Inc./(qb)

20080042605 - Electric motor drive control method and apparatus: An electric motor drive control method includes deriving a target current from a target torque to apply electric current corresponding to the target current to an electric motor. When a rotation speed of the motor is in a predetermined speed region, including a zero rotation speed at which the target... Agent: Oliff & Berridge, PLC

20080042606 - Feedback control method and apparatus for electric motor: A feedback control method and apparatus for detecting phase currents of three or more phases on fixed coordinates of a polyphase electric motor with current sensors so as to be transformed into detection currents on rotating coordinates by fixed/rotating coordinate transformation and controlling the currents supplied to respective phases of... Agent: Oliff & Berridge, PLC

20080042607 - Electric tool switch mechanism: An electric tool switch mechanism includes a trigger switch for operating to at least rotate or stop a DC motor; and a power switch connected between the DC motor and a battery power source and closed when a pressed amount of the trigger switch exceeds a predetermined threshold value. The... Agent: Bacon & Thomas, PLLC

20080042608 - Semiconductor wafer processing accelerometer: An end effector of a robot tool that includes accelerometers and methods to sense end effector motion. A semiconductor substrate or similar object may be supported by the end effector. Motion of the end effector and associated substrate movement may be transduced and sampled according to specified conditions. The sampled... Agent: Schwegman, Lundberg & Woessner, P.A.

20080042609 - Motor control device and corresponding control method: The aim of the invention is to provide a speed control method for reducing current ripple and speed ripple at constant dynamics behavior while reducing the hardware required to a minimum. For this purpose, a control signal, especially a speed deviation (ev) is divided up into at least two signal... Agent: Henry M Feiereisen, LLC

20080042610 - Electric motor and a method therefor: e

20080042611 - Self-excitation of switched reluctance generators during load bus faults: A self-excited, switched reluctance generator obtains excitation energy from a capacitor bank via an excitation bus during normal operation. During a short-circuit or load fault, one or more phases of the generator provide power to the excitation bus while the remaining phases send current to a faulted positive bus. The... Agent: Carlson, Gaskey & Olds, P.C.

20080042612 - Parking control technique for permanent magnet motor drives with sinusoidal bemf: A method and system for controlling a current regulator motor control for parking a motor rotor in a predetermined position, wherein a first current command and a first angle command are supplied to a current regulator for a first parking time, to move the rotor to an intermediate position; and... Agent: Ostrolenk Faber Gerb & Soffen

20080042613 - Motor control unit: A motor control unit includes a power converter unit that energize a motor based on a commutating signal, the motor having a rotor provided with a permanent magnet and a stator having a coil wound thereto; a start-up controller that outputs a commutating signal to the power converter unit during... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080042614 - Motor control unit: A motor control unit including a rotational position detector detecting a rotational position of a brushless DC motor; a current detector detecting a current of the brushless DC motor; a coordinate transformer executing rotational coordinate transformation of the current by a control phase angle and obtaining a d-axis current and... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080036403 - Fan control system: A fan control system. The system includes a plurality of fans, each having a control device. One of the fans is designated as a master fan and others are served as slave fans according to a specific designation method, wherein the control device of the master fan actively monitors and... Agent: Birch Stewart Kolasch & Birch

20080036404 - Elecrtric motor controller for a domestic appliance: The invention relates to a three-phase asynchronous electric motor for domestic appliances, comprising power elements, such as triacs or relays, for charge control. The power elements other than the relays are controlled by at least one microcontroller with the aid of an optical insulation means, ensuring electronic programming and also... Agent: Oliff & Berridge, PLC

20080036405 - Motor control circuit for forward/reverse rotation: A motor control circuit for forward/reverse rotation comprises a driving circuit, a switching circuit and a motor coil winding. The driving circuit has a driving source, a Hall IC and a driving IC. The driving source provides a signal to enable the Hall IC to output a control signal to... Agent: Troxell Law Office PLLC

20080036406 - Open/close member control apparatus: The present invention provides an open/close member control apparatus capable of blocking entry of a ruffian even if forced closing operation is cancelled during closing operation of an open/close member by the forced closing operation and suppressing damage on an object which is erroneously caught. In the open/close member control... Agent: Birch Stewart Kolasch & Birch

20080036407 - Load driving device and electrical apparatus using the same: A load driving device includes a driver that supplies drive current to a load having an inductance component, a current sensing resistor that generates sensed voltage corresponding to switching current that flows in the driver, a switch circuit that delivers one of the sensed voltage and a predetermined bias voltage... Agent: Fish & Richardson P.C.

20080036408 - Method for determining the rotor angular position of a rotating electrical machine: A method is disclosed for determining the rotor angular position of a rotating electrical machine, which machine has a set of stator windings and a set of rotor windings, and in which method the set of stator windings is fed by an associated converter unit. First, the set of stator... Agent: Buchanan, Ingersoll & Rooney PC

20080036409 - Method for controlled braking of a door and device for applying said method: The invention relates to a method for controlled braking of an electrically powered lifting action in the event of a failure, such that at least one of the nominal values for “rotational direction” and/or “operating speed” and/or “door position” and/or “motor capacity” and/or “motor current” is ascertained and compared with... Agent: St. Onge Steward Johnston & Reens, LLC

20080036410 - Sliding member controller: A controller for controlling a sliding roof sets, as an operating area, a predetermined range in the sunroof slidable range and controls a motor driving the sliding roof such that the sliding roof slides in the operating area. When the sliding roof stops near a sliding lock end, the stop... Agent: Posz Law Group, PLC

20080036411 - Air cleaner and air cleaner state backup: An air cleaner is provided according to an embodiment of the invention. The air cleaner includes a volatile memory including an air cleaner state memory element and a non-volatile memory including an air cleaner state backup memory element. The air cleaner is configured to store an air cleaner state to... Agent: The Ollila Law Group LLC

20080036412 - Wireless 3d auto-offset system for robot arms: A wireless 3D auto-offset system for robot arms is provided. The wireless 3D auto-offset monitor sensor of the system includes an electronic leveling sensor, a Z-axis optical scale, and an XY-axes CCD monitor sensor for monitor and judgment of level states, offsets, and gaps, respectively.... Agent: Birch Stewart Kolasch & Birch

20080036413 - Servo control device: In order to solve this problem, the servo control device according to the invention includes a position controller (3) for generating a speed command that matches the motor output with a target position, a feed-forward controller (4) for adding a signal obtained by multiplying the differential of a target command... Agent: Sughrue-265550

20080036414 - Motor control system for controlling a plurality of motors: A motor control system for controlling a plurality of motors for moving an object in respectively different axial directions that includes a plurality of target devices, each target device including a (pulse width modulation) PWM signal generator that generates a PWM signal for driving a motor using a triangular signal,... Agent: Mcdermott Will & Emery LLP

20080036415 - Controller for motor: There is provided a controller for a motor capable of changing the phase difference between two rotors that can prevent demagnetization of permanent magnets or the rotors. The motor has two rotors each having a permanent magnet and phase difference changing driving means for changing the phase difference between the... Agent: Arent Fox LLP

20080036416 - A device and method for controlling the motor of treadmill: This invention relates to a device and method for controlling the motor of treadmill, in which an operational frequency baseline value for the motor is pre-set in a frequency converter, according to the operational frequency of the motor being higher or lower than the pre-set baseline value, the six exiting... Agent: Wpat, PC Intellectual Property Attorneys

20080030154 - Apparatuses and methods for controlling rotational direction of fan: An apparatus is used for controlling a rotating direction of a fan. The apparatus comprises a power source, a signaling unit, a switching unit, and an activating module. The power source is used for supplying power for the apparatus. The signaling unit is used for generating direction-control signals. The switching... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20080030155 - Gearless wheel motor drive system: Methods and apparatus are provided for an electric vehicle embodying an axial flux traction motor directly coupled to a wheel thereof. The traction motor comprises a stator having coils for producing a magnetic field, an annular rotor magnetically coupled to the stator and mechanically to an output shaft. Permanent magnets... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20080030156 - Powered panel moving system: A powered panel moving system includes a motor, electronic drive circuitry, mechanics, a coupler, and electronic anti-entrapment circuitry. The drive circuitry drives a rotor of the motor such that the rotor has a rotational output in response to being driven. The mechanics moves a panel upon being driven. The coupler... Agent: Brooks Kushman P.C.

20080030157 - High steps brushless dc (bldc) motor: A brushless motor circuit is for driving a brushless direct current (BLDC) motor. The motor includes a rotor and exciting coils for respective phases in a three-phase winding in a star configuration. A neutral point in the star configuration is configured to switch to one of a ground voltage, a... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20080030158 - Centrifugal fan: In a centrifugal fan including an impeller, a motor for rotating the impeller and housing, the electric power is limited such that the power consumption of the centrifugal fan when it is employed in a device is equivalent to the rated electric power of the device for enhancing the static... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080030159 - Raindrop quantity sensing apparatus and wiper control system having the same: A change computing arrangement computing an amount of change in a measured value of a measurement signal of a raindrop sensor in a raindrop quantity sensing execution time period that is a time period, during which a wiper blade moves outside of a sensing range of the raindrop sensor. A... Agent: Nixon & Vanderhye, PC

20080030160 - Head position control method, head position control device, and disk device: In a positioning control device based on control of an observer having a disturbance suppression function, a disturbance suppression function according to a head position is added without impairing the control characteristics of the observer. The position control device has an observer having a disturbance suppression function comprising a model... Agent: Greer, Burns & Crain

20080030161 - Electric motor system: An electric motor system having a rotor with a plurality of permanent magnets, and a stator having a winding through which current is flowing for driving the rotor. A control unit controls the current flowing through the winding. The control unit employs a first filter and a second filter, each... Agent: The Eclipse Group

20080030162 - Method and system in connection with permanent magnet synchronous machines: A method and a system in connection with a speed and position sensorless permanent magnet synchronous machine equipped with an output filter (26) and driven by an inverter (29), which method comprises the steps of forming a speed-adaptive full-order observer (25) based on the dynamic model of the combination of... Agent: Buchanan, Ingersoll & Rooney PC

20080030163 - Controller for motor: A controller has a Ke command calculator 90 that calculates a command value Ke_c of the induced voltage constant of a motor 1 based on the output voltage Vdc of a direct-current power supply, the number of revolutions Nm of the motor 1 and a torque command Tr_c in such... Agent: Arent Fox LLP