Electricity: motive power systems inventions 08/08

20080203949 - Controlling torsional shaft oscillation: Torsional oscillation of a shaft in a swing drive system of an excavator is minimized by monitoring torsional strain of the shaft. An electric motor provides torque to the shaft in response to a drive signal provided by a converter. A compensation circuit produces a compensation signal as a function... Agent: Senniger Powers LLP

20080203950 - Drive unit: The drive unit, being small in drive noise, includes an electromechanical transducer element 5, a vibrating member 6, a frictional engagement member 7, and a drive circuit 4 which is enabled to apply either a periodic main drive voltage that allows the frictional engagement member 7 to be slidingly displaced,... Agent: Brinks Hofer Gilson & Lione

20080203951 - Semiconductor integrated circuit for sensorless driving and sensorless driving system: A semiconductor integrated circuit for sensorless driving of a brushless motor, has: an induced voltage detecting circuit which includes a comparator for comparing a voltage induced in an exciting coil by a rotation of a rotor of the brushless motor with a midpoint voltage of the rotor of the brushless... Agent: Amin, Turocy & Calvin, LLP

20080203952 - Electronic control unit for controlling external half-bridge power output stages and an electric motor operated drive with electronic control unit: In order to control an electromotive drive, a control unit has control modules for controlling half-bridge end power stages. Two of the control modules are pre-configured for alternatively controlling a commutator motor or a brushless electric motor via two half-bridge end power stages. A third control module can be subsequently... Agent: Lerner Greenberg Stemer LLP

20080203953 - Control bandwidth for cost effective ac motor drives in aerospace applications using two dsp devices with dissimilar redundant inter-processor communication link: A digital control system for an electric motor uses two motor-control DSP's operated in parallel to provide high bandwidth motor control. Each of the two DSP's individually may have a limited processing rate (e.g. about 150 million instructions per second [MIPS]). Parallel operation of the DSP's with efficient cross-communication may... Agent: Honeywell International Inc.

20080203954 - Induction motor analysis and control method: An induction motor controller that may include three phase paths leading from a power input to a power output, a solid-state switching device interposed between the power input and the power output on each of the three phase paths, a voltage sensor coupled to two of the phase paths between... Agent: Rockwell Automation, Inc./(fy)

20080203955 - Legged mobile robot: In a legged mobile robot (1), each leg (2) has at least a first joint (16) and a second joint (18, 20) located below the first joint in the gravitational direction, and the actuator that drives the second joint (54, 56) is located at least one of a position same... Agent: Squire, Sanders & Dempsey L.L.P.

20080203956 - Predictive maintenance method: The predictive apparatus and method for preventive maintenance of rotating CNC machinery for application to a multi motor machine tooling operating under computer numerical control with provisions for a program control using the computer (22) and a multiplexing device (24) with steps for measuring the constant load momentum of inertia... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20080203957 - Motor control method and motor control apparatus: A motor control method includes the steps of: measuring a time period from an output of a drive detection signal to a next output of a drive detection signal; storing the measurement result at each time of output of a drive detection signal as a measured cycle; calculating a driven... Agent: Baker Botts LLP C/o Intellectual Property Department

20080203958 - Motor controller and electric power steering apparatus: A second computing section executing a compensation control is provided with a third computing section computing a d-axis correction amount, and a fourth computing section computing a q-axis correction amount. The respective computing sections compute a d-axis correction coefficient and a q-axis correction coefficient corresponding to an rotation angle by... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080203959 - Servo motor controller: A controller includes a rotating direction detecting unit 34 to detect the rotating direction of a servo motor 6, a reversing distance computing unit 31 to compute a rotating angle of the servo motor 6, a rotation resistance computing unit 35 to compute rotation resistance on the servo motor side... Agent: Burr & Brown

20080203960 - Method and apparatus for estimating system inertia where number of motor rotations are restricted: A method and apparatus for estimating inertia of an electric motor that drives a load wherein the load has a limited range of load travel, the method comprising the steps of identifying an intermediate position along the range of load travel that is separated from a first end of the... Agent: Quarles & Brady LLP

20080203961 - Motor driving apparatus: A controller for a motor driving apparatus switches a direction of electricity flowing through a first coil according to a first lead angle signal obtained based on a first magnetic pole detecting signal and a second magnetic pole detecting signal. The controller switches a direction of electricity flowing through a... Agent: Canon U.s.a. Inc. Intellectual Property Division

20080203962 - Apparatus and method for driving synchronous motor: The synchronous motor driving apparatus including position sensors provided in the synchronous motor, a current polarity detection circuit for detecting the polarities of the currents in the respective phase windings of the synchronous motor, an inverter driving the synchronous motor, a motor speed calculation unit calculating the rotational speed of... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080203964 - Method and device for controlling motor, and image forming apparatus: A control unit controls a drive signal for determining a voltage to be supplied to the motor. A drive unit drives the motor by applying a current corresponding to the voltage determined based on the drive signal to the motor. The control unit includes a velocity detecting unit that detects... Agent: Harness, Dickey & Pierce, P.L.C

20080203963 - Motor controller and electric power steering apparatus: A microcomputer includes a calculating section calculating a d-axis electric current command value and a q-axis electric current command value and a signal generating section. The signal generating section generates a motor control signal through feedback control in a d-q coordinate system based on the d-axis electric current command value... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080197791 - Control device for vehicular drive system: A control device for a vehicular drive system controls an engine rotation speed (NE) in a way not to exceed an engine upper limit rotation speed (NELIM). The engine upper limit rotation speed is altered depending on a second electric motor rotation speed (NM2) such that a second electric motor... Agent: Oliff & Berridge, PLC

20080197792 - Door opener error-start prevention device: The present invention provides a door opener error-start prevention device, in which the output shaft of the door opener is formed as a hollow accommodation portion in the center, and a pair of axial sliding slots being formed from the periphery to pass through the accommodation portion, and a sliding... Agent: Bucknam And Archer

20080197793 - Control of an electrical machine: A switched reluctance machine has salient poles on the stator and rotor. The windings of the machine are supplied from a converter which provides energisation at a chosen rate. The windings of the machine may be energised at the rate at which the rotor poles pass the stator poles, or... Agent: Haynes And Boone, LLP

20080197794 - Method and apparatus for driving a dc motor: A circuit for determining a direction of rotation of an electric motor, the motor having asymmetry and/or eccentricity in a profile of back electromotive force as a function of angular position of a rotor with respect to a stator, the circuit receiving a signal representing the BEMF, and use the... Agent: Workman Nydegger

20080197795 - Asymmetric control system for a sensorless and brushless electric motor: A particularly high level of performance in a sensorless, electronically commutated multiphase electric motor can be achieved, wherein for one full cycle at least, one motor phase is controlled in an asymmetrical manner relative to a further motor phase by controlling a commutation angle of one motor phase by reduction... Agent: Baker Botts L.L.P. Patent Department

20080197796 - System and method for controlling electric drive systems: Methods, apparatus, and systems are provided for regulating the operation of a drive system within a battery voltage and power range. The apparatus includes a PI regulator producing a signal for regulating a torque output of the drive system based on a DC voltage source limit and/or power limit, a... Agent: General Motors Corporation Legal Staff

20080197797 - Motor having integral programmable logic controller: A system, in one embodiment, includes a drive having a housing, a stator disposed in the housing, a rotor disposed in the stator, and a programmable logic controller disposed inside, mounted on, or in general proximity to the housing. In another embodiment, a system includes a network, a first motor... Agent: Thompson Coburn, LLP

20080197798 - Stepping motor drive: A stepping motor drive is provided, by which a recoil movement of a driven member upon an initialization action can be reduced. The stepping motor drive includes: a drive signal supply means which supplies a plurality of periodic drive signals having different phases from each other to generate a rotation... Agent: Edwards Angell Palmer & Dodge LLP

20080197799 - Motor control device: The motor control device includes a current detecting portion for detecting a phase current that flows in an armature winding of a stator of a three-phase motor based on current that flows between an inverter for driving the motor and a DC power supply. The motor control device performs a... Agent: Ditthavong Mori & Steiner, P.C.

20080197800 - Reduction of subharmonic oscillation at high frequency operation of a power inverter: A control architecture for an electrical inverter includes a synchronous frame current regulator and a stationary frame current regulator. The stationary frame current regulator receives input currents that represent filtered versions of stationary frame currents that correspond to the inverter output currents. The control architecture employs an adaptive filter module... Agent: General Motors Corporation Legal Staff

20080191646 - Driving device of armature balance machine: Disclosed herein is a driving device of armature balance machine, in which a driving motor is formed on the same centerline of the armature, a hinge block pivot-connected by the hinge shaft is installed in the finger mounter of the bracket in such a manner that the hinge shaft is... Agent: Jhk Law

20080191647 - Control circuit for an arrangement having at least two direct current motors that are connectable in parallel to a direct voltage system: The invention relates to a control circuit for an arrangement having at least two DC motors (10, 12), which can be connected in parallel to a DC voltage system (16, 18), in particular a circuit for controlling at least two motors of a motor vehicle fan. In this case, the... Agent: Michael J. Striker

20080191648 - Closed loop control of linear vibration actuator: In a closed loop control method of a linear vibration actuator which vibrates linearly and energized by a switching element driven in a PWM control method, a crest or peak point (Bc, Bp) of the back electromotive force occurring in the linear vibration actuator is detected (S14). The detected crest... Agent: Ratnerprestia

20080191649 - System and method for efficient wide dynamic range coil drive: Methods and systems are provided for driving one or more force coils. A system for driving force coils is provided including a PWM drive coupled to a first coil and a linear drive coupled to a second coil. The PWM drive efficiently drives the first coil to apply a first... Agent: Honeywell International Inc.

20080191650 - Brake responsive vehicle electric drive system: The invention relates to a vehicle electric drive system. There is a need for a brake responsive vehicle electric drive system. A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, and drive wheels driven by a traction motor/generator. The motor/generators are controlled... Agent: Deere & Company

20080191651 - Apparatus and process for controlling and adjusting the operating of electric motor actuated devices: Controlling and adjusting of the operation of a device actuated by an electric motor are carried out by shutting down the electric power supply of said electric motor at a plurality of time intervals during the motor operation, measuring in the time interval the voltage supplied by the electric motor,... Agent: Hess Patent Law Firm, P.c.

20080191652 - Heat treatment of metal work pieces: The invention relates to a method for heat-treating metal work pieces, whereby a cooling gas flow is produced in a vacuum furnace by means of a fan, driven by a three-phase AC motor, in order to quench the work pieces. The aim of the invention is to improve the heat... Agent: Cantor Colburn, LLP

20080191653 - Robot cleaner using edge detection and method of controlling the same: A robot cleaner and a method of controlling the same are disclosed. The robot cleaner cleans a given cleaning area simultaneously while moving in the cleaning area. The method includes detecting whether an obstacle exists in a traveling path of the robot cleaner, determining whether the detected obstacle is an... Agent: Staas & Halsey LLP

20080191654 - Method and device for monitoring the condition of an industrial robot: A method for monitoring the condition of an industrial robot having a plurality of links movable relative to each other, and a plurality of actuators controlling the movements of the links. A feed forward torque is calculated for at least one of the actuators based on reference values for the... Agent: Venable LLP

20080191655 - Motor controller and electric power steering system: An angle computing section determines an angle of a rotor, and an angular velocity computing section determines angular velocity of the rotor. A command current computing section determines, from a steering torque and vehicle velocity, command currents and taken along d-q axes. An open loop control section determines, from command... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080191656 - Synchronous machine control apparatus: A synchronous machine control apparatus which can produce a torque level as close as possible to a desired torque command level while considering limitations on an output current of a power conversion unit. A synchronous machine control apparatus includes a torque current command generator including a torque current calculator for... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080191657 - Phase detection method, phase detecting apparatus, synchronous-motor control method, and synchronous motor controller: It is determined which of six continuous sections having different magnitude correlation of signal amplitude of each phase of an input three-phase signal a section is. Predetermined subtraction is performed between respective phases in the section, to obtain a normalized amplitude value normalized in the section, using the subtraction result.... Agent: Mcdermott Will & Emery LLP

20080191658 - Method for feeding an operating motor of a rolling shutter and a device for a driven rolling shutter: The inventive method makes it possible to feed an alternating current electric motor used for operating a rolling shutter in a building by means of a gear whose performance substantially varies when a movable element drives or is driven by the rolling shutter. The electric motor is supplied, in certain... Agent: Frommer Lawrence & Haug

20080191659 - Sumbersible motor: A submersible motor is provided for a submersible pump, the motor being configured as a single-phase asynchronous motor, which includes a main winding (6), an auxiliary winding (8), and a starting device (10, 14, 16, 18, 20, 22) for controlling the starting procedure of the submersible motor. The starting device... Agent: Panitch Schwarze Belisario & Nadel LLP

20080191660 - Method and device for controlling a three-phase machine having several phase windings, which can be controlled by means of pulse width modulation: An aspect of the invention is a method and a device for controlling a rotating field machine having several phase windings, which can be controlled by means of pulse width modulation, wherein a pulse width modulation controller is adapted in such a way that an individual winding of the phase... Agent: Siemens Corporation Intellectual Property Department

20080185982 - Cylinder-type linear motor and moving part thereof: There is provided a cylinder-type linear motor capable of shortening the total motor length with respect to a predetermined stroke length S and capable of being operated without sensor means for sensing the position of a moving part being added in the axial direction. The cylinder-type linear motor includes a... Agent: Myers Bigel Sibley & Sajovec

20080185983 - Motor controller and electric power steering apparatus: A microcomputer (an electric current command value calculating section) carries out field weakening control in which a d-axis electric current command value Id* is set to a negative value in correspondence with rotation angular velocity ω of a motor. The microcomputer determines whether an anomaly has occurred in an EPS.... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080185984 - Power tool and overload protection: The invention relates to a power tool having a change-speed gear device comprising a plurality of gears (1, 2) for adjusting on demand power stages of a drive, wherein an overload protection can be coupled to the gears (1, 2). According to the invention, the device comprises at least one... Agent: Michael J. Striker

20080185985 - Leg type mobile robot: A leg type mobile robot includes a foot joined to a distal end of a leg through a second joint. The foot includes a foot flat portion having a ground contact end of the foot, a movable portion joined to the second joint and configured to be movable in a... Agent: Squire, Sanders & Dempsey L.L.P.

20080185986 - Low noise heating, ventilating and/or air conditioning (hvac) systems: A heating, ventilating and/or air conditioning (HVAC) system includes a system controller, a motor controller, an air-moving component, and a permanent magnet motor having a stationary assembly, a rotatable assembly in magnetic coupling relation to the stationary assembly, and a shaft coupled to the air-moving component. The motor controller is... Agent: Harness, Dickey, & Pierce, P.l.c

20080185987 - Integrated circuit for driving motor: A motor driving integrated circuit for controlling motor driving, comprising: a data signal input terminal; a data signal receiving circuit configured to receive a data signal inputted from the data signal input terminal; a control circuit configured to control the motor driving integrated circuit based on a first data received... Agent: SocalIPLaw Group LLP