Electricity: motive power systems inventions

20080169775 - Control apparatus for electric car: A control apparatus for an electric car, including a power converter which feeds AC power of variable voltage and variable frequency to a primary side member of a linear electromagnetic actuator, voltage command means for giving a command of a voltage which is fed to the linear electromagnetic actuator, current... Agent: Buchanan, Ingersoll & Rooney PC

20080169774 - Integrated linear motor: The present invention provides an integrated linear motor, which comprises a linear stage and a controller coupled to the linear stage, wherein the linear stage comprises a Hall sensor, an encoder, and a linear motor integrated thereon and the controller comprises a microprocessor, an amplifier, and a power supply integrated... Agent: Charles E. Baxley, Esq.

20080169776 - Power supply device for an electric motor method for operation of an electric motor: A power supply device for an electric motor, operated either in a normal operating mode and/or an emergency operating mode, in particular, for an actuator in a motor vehicle and a method for operation of an electric motor in a normal operating mode and/or an emergency operating mode, in particular,... Agent: Volpe And Koenig, P.C.

20080169777 - System and method for adjusting a dead-time interval in a motor control circuit: A system and a method for adjusting a dead-time interval between de-activating a first transistor and activating a second transistor in a motor control circuit are provided. The method includes determining a plurality of commanded torque values associated with a motor based on a received signal over time. The method... Agent: Cantor Colburn, LLP

20080169778 - Axis-of-rotation position control device: When performing numerical control of a rotary table, the moment of inertia and the center of gravity of a control target change because of a placed object fixed onto the rotary table. A rotary table to which a placed object has been fixed serves as a target plant, the actual... Agent: Osha Liang L.L.P.

20080169779 - Modular trolling motor control system: A trolling motor control system includes plurality of modules that are connected to a communication bus to transmit and receive data used in controlling operation of a trolling motor. Based upon data transmitted over the bus, trolling motor speed, steering, and trim can be controlled. The modules can include motor... Agent: Kinney & Lange, P.A.

20080169780 - Method and device for determining the duty-cycles of pwm control signals of an inverter: A method for determining duty-cycles of respective pulse width modulated (PWM), space vector modulated (SVM) control signals of an inverter, may include storing values of the duty-cycles as a function of a position of the multi-phase electric load in a look-up table. The method also may include determining a phasor... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20080169781 - Active damping device for a positioning stage: A damping apparatus is provided for a positioning stage that is operative to move and position an object along a motion axis. The damping apparatus comprises a motion transformation device operative to rotate the positioning stage about a rotary axis that is substantially perpendicular to the motion axis, in response... Agent: Ostrolenk Faber Gerb & Soffen

20080169782 - Method for sensorless estimation of rotor speed and position of a permanent magnet synchronous machine: A method for sensorless estimation of rotor speed and position of a permanent magnet synchronous machine, when the permanent magnet synchronous machine is fed with a frequency converter, the method comprising the steps of forming a stator voltage reference for the permanent magnet synchronous machine, injecting a high frequency signal... Agent: Buchanan, Ingersoll & Rooney PC

20080169783 - Induction motor controller: The present invention provides an induction motor controller which includes: a circuit for generating a d-axis current reference signal from a d-axis current command value and a periodically varying periodic signal; a d-axis current controller for controlling a d-axis motor current flowing through an induction motor to be controlled to... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080164830 - Synchronous linear motor with non-contacting scanning of the toothed structure of the secondary part: The aim of the invention is the equipping of a synchronous linear motor with a non-permanently-magnetic secondary part with a simple positional measuring system. Said aim is achieved, whereby the tooth structure of the toothed rack-shaped non-permanently-magnetic secondary part (S) varies with position in the direction of movement (B). Furthermore,... Agent: Henry M Feiereisen, LLC

20080164831 - Modular soft starter: Modular soft starters are disclosed having a plurality of soft starter modules with stacked SCRs and heat sinks for accommodating a single phase of a three phase motor, where the modules may be connected serially for starting each phase of a higher voltage motor, and where the modules can be... Agent: Rockwell Automation, Inc./fay

20080164832 - Rotation control device and construction machine: To rotate a rotary body at a constant velocity, a swing control device 50 of an electric rotary excavator controls the rotation of the rotary body with a small first torque command value T1. Thus, when inertia moment of the rotary body is changed due to extension or retraction of... Agent: Frishauf, Holtz, Goodman & Chick, PC

20080164833 - Disc apparatus: A disc apparatus (1) includes a spindle motor (3) which rotates a disc (2), a differential operational amplifier (5) which detects a difference between voltages of a positive terminal and a negative terminal of the spindle motor (3) as a detecting voltage level, a failure judgment unit (10) which judges... Agent: Crowell & Moring LLP Intellectual Property Group

20080164834 - Device and method for controlling machine tool: A device for controlling a feed motion of a feed control axis and a rotary motion of a rotary control axis, both axes being provided in a machine tool so that the rotary control axis is fed along the feed control axis. The device includes an interference estimating section estimating... Agent: Drinker Biddle & Reath (dc)

20080164835 - Stepping motor controller and stepping motor control program: A stepping motor controller for controlling a stepping motor which drives a load, including: a load drive state detection section which detects a driving state of the load; and a control section which controls the stepping motor, when a detection result of the load drive state detection section is beyond... Agent: Cantor Colburn, LLP

20080164836 - Static frequency converter with automatic function for optimizing magnetic flux and minimizing losses in electric induction motors: “STATIC FREQUENCY CONVERTER WITH AUTOMATIC FUNCTION FOR OPTIMIZING MAGNETIC FLUX AND MINIMIZING LOSSES IN ELECTRIC INDUCTION MOTORS”, having an automatic function for regulating and controlling magnetic flux in the motor in function of the motor's operating frequency, such that the motor operates with ideal magnetic flux and consequently with less... Agent: Cantor Colburn, LLP

20080157702 - Electric motor with a retractable shaft: An electric motor (100) for controlling the lateral displacement of a shaft (114) connected to a rotor (104) of the electric motor (100) is provided. The electric motor (100) includes one or more stator conductors (106) for carrying a current and one or more permanent magnets (108) to produce a... Agent: Motorola Inc

20080157703 - Synchronous reluctance machines: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC... Agent: Jackson, Demarco, Tidus & Packenpaugh

20080157704 - Raindrop detecting device and method of selecting wiping mode for vehicle: A raindrop detecting device for detecting a raindrop amount on a windshield of a vehicle and selecting a wiping mode of a wiper based on the detected raindrop amount includes a controller for lowering the wiping mode when the detected raindrop amount is kept to be smaller than a mode-keep... Agent: Nixon & Vanderhye, Pc

20080157705 - Magnetic absolute encoder: In the magnetic absolute encoder, an ordinary operating circuit and an ordinary/backup operating circuit are actuated during ordinary operation in which power is supplied from the ordinary operating power supply; the single-rotation absolute value (1) and single-rotation absolute value (2) detected by these circuits are compared by the abnormality diagnosis... Agent: Buchanan, Ingersoll & Rooney Pc

20080157706 - Method for controlling a heat engine vehicle driving assembly: The invention concerns a method for controlling a vehicle driving assembly which consists in applying to a variable reluctance machine (6) a conduction angle setpoint value (??p), in regulating said conduction angle setpoint value (?p) using an additional angle conduction (??p) determined on the basis of a torque control measurement... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080157707 - Electric motor and method of controllling said motor: The invention relates to a sensorless electric motor and a method of controlling such an electric motor, which motor comprises a permanently magnetic rotor, a stator having at least one winding, and a power stage for influencing the current flowing through the winding. As a function of a predetermined commutation... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20080157708 - Method and apparatus for determination of the rotor position of an electric motor: The invention relates to a method for determining the angular position (theta) of a rotor (2) pertaining to an electric motor (1) and comprising a number of pairs of poles. Said method consists of the following steps: a pulse pattern (PM1, PM2, PM3) with a pulse duration (T) flows through... Agent: Henry M Feiereisen, Llc

20080157710 - Beat-less controller for permanent magnet motor: In a driving system for an inverter that uses a diode rectifying circuit to convert a single-phase or three-phase AC voltage to a desired DC voltage and drives a permanent magnet motor, a DC-voltage pulsating frequency is estimated from a pulsating frequency setting calculated from the power supply frequency of... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080157709 - Highly responsive permanent magent motor controller: Current command values are used instead of detected current values to estimate axis error by calculation. An axis error command value is generated according to a speed command value, and a difference between the generated axis error command value and the estimated axis error value is used to control an... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080150454 - Multi-drive motor: The objective is solved by providing a the multi-drive motor comprises: a rotor 101 having an internal gear, a plurality of element motors 11˜14 for rotating a driving gear 102 meshing from the inside with the internal gear and thereby rotating the rotor 101, and a fixing flange 103, to... Agent: Berenato, White & Stavish, Llc

20080150455 - Dual motor drive system, control device for the same, and motor to be used in the same: An inverter having M×N arms is connected to a first motor having N groups of M phase coils and a second motor having M groups of N phase coils. At least one of the first motor and the second motor has as many teeth as the number of phases of... Agent: Squire, Sanders & Dempsey L.l.p.

20080150456 - Apparatus and method for controlling operation of reciprocating compressor: An apparatus and method for controlling an operation of a reciprocating compressor are disclosed. The apparatus for controlling an operation of a reciprocating compressor includes: a current phase delay value generating unit that calculates a current phase delay value by using a current stroke and a detected current and outputting... Agent: Greenblum & Bernstein, P.L.C

20080150457 - Method and apparatus for monitoring an electrical energy storage device: A method and article of manufacture for monitoring an electrical energy storage device adapted to supply electrical power to a selectively actuable electric motor is described. This comprises determining a state of charge and a temperature of the electrical energy storage device subsequent to a stabilization period, and measuring a... Agent: General Motors Corporation Legal Staff

20080150458 - Adjustable brake device: The invention relates to an adjustable brake device that can be used in conjunction with a hinge mechanism of a folding electronic device, e.g. a clamshell mobile phone. The adjustable brake device comprises a brake actuator that is able to generate a braking force responsive to a magnetic flux directed... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20080150459 - Safe electric braking device for printing presses and method of electrically braking an electric drive in a machine processing printing material: A method and device for electrically braking an electric drive in a machine for processing printing material, includes a power electronics connected between the electric drive and a DC voltage intermediate circuit. A further electric braking device is switchable between the electric drive and the power electronics. Upon a failure... Agent: Lerner Greenberg Stemer LLP

20080150460 - Drive arrangement for a portable working machine: A drive arrangement for a hand-guided working machine for agriculture, forestry and horticulture applications. The drive arrangement comprises an electric motor, a DC power source for electrical energy, and a control apparatus for the electric motor which is fed from the DC power source. The electric motor has a specific,... Agent: Klarquist Sparkman, LLP

20080150461 - Self-powered assembly for the actuation of a roller blind or awning: An actuation assembly (INST) of a screen (SCR) for closure, solar protection or privacy, comprising, on the one hand, a motorized actuator (ACT) furnished with wireless control command receiving means (RCU) and, on the other hand, a standalone power supply assembly (PWU) furnished with at least one rechargeable accumulator (BAT)... Agent: Frommer Lawrence & Haug

20080150462 - Method and arrangement in connection with motor fed with frequency converter provided with intermediate voltage circuit: Method and arrangement in connection with a motor fed with a frequency converter provided with an intermediate voltage circuit. The method comprises steps of feeding motor voltage to the motor along a motor cable with a frequency converter for controlling the motor, rectifying the voltage of the motor cable and... Agent: Buchanan, Ingersoll & Rooney Pc

20080150463 - Windshield wiper control apparatus: Windshield wiper control apparatus comprises one or more door-open sensors and electronic control circuitry operative to terminate or slow down the operation of the windshield wipers if the door associated with that sensor is opened. The apparatus may further include an inclement weather detector, such that the electronic control circuitry... Agent: Gifford, Krass, Sprinkle,anderson & Citkowski, P.c

20080150464 - Operation of an electrical drive system: An electrical drive system includes an electrical machine controlled by an electronic controller, which requires feedback of signals representing quantities associated with the operation of the electrical machine. These signals may represent, for example, flux, current and/or rotor position. The integrity of these signals is validated by setting suitable thresholds... Agent: Haynes And Boone, LLP

20080150466 - Debris sensor for cleaning apparatus: A piezoelectric debris sensor and associated signal processor responsive to debris strikes enable an autonomous or non-autonomous cleaning device to detect the presence of debris and in response, to select a behavioral mode, operational condition or pattern of movement, such as spot coverage or the like. Multiple sensor channels (e.g.,... Agent: Fish & Richardson P.c.

20080150465 - Lower half body module of bipedal walking robot: It is an object of the present invention to provide a lower half body module of a bipedal walking robot which is excellent in practicality in the point that it is possible to transport a heavy load, and which is excellent in the degree of freedom in designing in the... Agent: Sughrue Mion, Pllc

20080150467 - Robot system able to secure worker safety: A robot of a robot system performs a desired operation by an operation motor and moves along a route by a movement motor. The robot system includes a robot power cutoff device for cutting off the power supply to the operation motor when making the robot move from one station... Agent: Lowe Hauptman Ham & Berner, LLP

20080150468 - Method for position and/or speed control of a linear drive: The invention relates to a method and a circuit layout for the position and/or speed control of a linear drive, in particular a servo drive for a linear robot. An electric motor is supplied via a converter (3) with a control unit (4) and the motor position is determined, in... Agent: Greenblum & Bernstein, P.L.C

20080150469 - Feedforward controller for synchronous reluctance machines: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC... Agent: Jackson, Demarco, Tidus & Packenpaugh

20080150470 - Controller for synchronous machine: A controller for a synchronous machine includes: a power converter; a synchronous machine driven by the power converter; a PWM modulation section for controlling the synchronous machine; a current detection section which detects a current conducted to the synchronous machine; a voltage detection section which detects a voltage applied to... Agent: Foley And Lardner LLP Suite 500

20080150471 - Motor starting and switching: A method of starting and apparatus for starting a multiphase electrical machine is disclosed. The aim is to reduce oscillatory pulsation in torque generated by the motor and inrush current that occurs shortly after start-up. The starting method comprises the steps of first connecting at least one, but less than... Agent: Baker Botts L.l.p.