Electricity: motive power systems inventions 05/06

20060108954 - Control device for a reversible rotating electrical machine: The invention relates to a control device for a reversible, multi-phased rotating electrical machine which can operate in alternator or motor mode. The inventive device comprises a main battery (4), an electric network (5) and a unit (3) for controlling and commanding an inverter and a rectifier bridge (P) for...

20060108955 - Method for voltage feedback for current mode linear motor driver: Methods and systems for driving a motor are disclosed. A center tap voltage and a desired center tap voltage are used to generate a voltage feedback. A power amplifier receives a reference current and the voltage feedback. The power amplifier provides a phase current to a phase of a motor....

20060108956 - Ac drive system for electrically operated vehicle: A drive system is provided for a utility vehicle and includes an alternating-current (AC) motor for providing a drive torque. An AC motor controller receives a battery voltage signal, throttle pedal position signal, brake pedal position signal, key switch signal, forward/neutral/reverse (FNR) signal, and run/tow signal indicative of the utility...

20060108957 - Motor controller: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The...

20060108958 - Holding arrangement having a device for actively damping vibration: In a holding arrangement (101) for a medical-optical instrument (103), an electric motor is provided in a rotational joint (111, 119) to compensate a load torque occurring in this rotational joint. This electric motor is supplied with current in correspondence to a detected position of the rotational joint (111, 119)....

20060108959 - Drive arrangement for activating the hatch of a motor vehicle: A drive arrangement that is an economical structure that makes optimum use of existing installation space is achieved by a drive arrangement, for actuating the hatch of a motor vehicle that is coupled to the body of the motor vehicle to pivot around a hatch axis opening and closing a...

20060108960 - Robot controller and robot system: A robot control apparatus with great safety is provided by detecting access of a teacher to a robot and automatically reducing the operating speed of the robot when the teacher accesses the robot. The robot control device equipped with a pendant (10) to be manipulated by a teacher, for controlling...

20060108961 - Multi-axis motor control device resonance frequency detection device: A resonance frequency detecting device of a multi-shaft electric motor control apparatus includes a plurality of electric motor control systems having electric motors (31, 32) for driving machines (41, 42) and controllers (21, 22) for driving the electric motors (31,32), detectors (51,52) for detecting the operating amounts of the machines...

20060108962 - Adaptive controller for pc cooling fans: A system and method for controlling a fan is disclosed. In one embodiment, a fan controller is integrated in silicon and uses an embedded microcontroller to implement a digital fan control algorithm. The microcontroller may continually monitor temperature and sample the speed of the controlled fan. The speed of the...

20060108963 - Method for protecting an electronic device driven by dc motor and circuit for detecting positioning signals thereof: A method for protecting an electronic apparatus driven by a DC motor and a detection circuit for detecting positioning signals thereof. The electronic device includes an optical encoder, a code strip, and a DC motor. While moves along the code strip, the optical encoder outputs a first positioning signal and...

20060108964 - Stepping motor servo driving method and driving mechanism: A servo driving method of the present invention to drive a stepping motor driven by a predetermined driving pulse, by a servo control method, is comprising a setting step of setting a driving mode of the stepping motor switchable at least between a first driving mode, in which the stepping...

20060108965 - Method to prevent midrange resonance during operation of a multi-phase step motor: The frequency of the pulse width modulator within a step motor control circuit is increased above a base frequency under defined conditions to enable more accurate construction of the phase current waveform for preventing mid-range resonance. The PWM frequency is stepped between frequencies by a fixed amount above the base...

20060108966 - Motor control apparatus: Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentially switching the motor current supply phase...

20060108967 - Synchronous motor control method and synchronous motor control system: A desired q-axis current is determined based on a desired torque, and a desired d-axis current is determined based on the rotating speed of a synchronous motor when the terminal voltage of the synchronous motor coincides with a predetermined maximum permissible voltage to weaken a magnetic field created by the...

20060108968 - Determination of start commutation in synchronous servo-drives: Method for the determination of start commutation in synchronous servo-drives by means of two coupled control loops, a current control circuit and an angle control circuit. The angle control circuit contains an incremental position sensor signal. A ramped desired value is predetermined by the current control. A constant angle desired...

20060108969 - Apparatus for controlling speed of fan motor of air-conditioner: An apparatus for controlling a speed of a fan motor of an air-conditioner includes a frequency and voltage phase converter for simultaneously varying a voltage phase and frequency of a commercial AC power according to a control signal and applying a voltage varied according to the varied frequency and voltage...

20060103334 - Mutual active cancellation of fan noise and vibration: A multi-fan apparatus and method incorporates mutual active cancellation of fan noise and/or vibrations. The multi-fan apparatus includes two or more fans circuits, each comprising a fan, a fan speed controller and a separate tachometer, and a fan phase controller. The phase controller is connected to at least one fan...

20060103335 - Rotor for a permanent-magnet electrical machine and a method for manufacturing it: The object of the invention is a rotor (4) for a permanent-magnet electrical machine, comprising an axle (6) mounted to the machine body with bearings, a rotor pack made of iron and arranged around the axle (6), as well as permanent magnets (10) adapted to the rotor pack, used for...

20060103336 - Control system for a load handling apparatus: A control system (40) for a machine (10) which includes a load handling apparatus (14), the load (L) being moveable relative to a body (12) of the machine by the load handling apparatus (14), the machine (10) including a pivot (C) about which a tipping moment is produced by the...

20060103337 - Method of controlling motor thermal protection for an electric power steering system of a motor vehicle: The invention relates to motor vehicles which are equipped with an electric power steering system. Using a known method, the value of the maximum current that is allowed to travel through the electric assist motor is calculated at each instant (t), and a threshold value is determined for said maximum...

20060103338 - Displacement control system for a vehicle axle: Provided is a motor control circuit in which the circuit structure is not complicated, which has a favorable response to the phase difference signal, and in which the signal variation caused by heat is small. This rotation control circuit of a motor includes: a PWM control circuit of the motor;...

20060103339 - Motor control apparatus: Before an amount of play in a rotation transmitting system is learned, for selecting a gear range, an overshooting control process is performed to cause the angular displacement of a motor to overshoot a target gear range position and then reverse the electric motor. The angular displacement of the motor...

20060103340 - Single-phase induction motor and method for reducing noise in the same: A single-phase induction motor and a method for reducing noise in the same, which can eliminate unbalance between magnetomotive forces of main and auxiliary windings in a stator of the motor, thereby implementing a low noise, low vibration motor, and can also achieve balance between the magnetomotive forces of the...

20060103341 - Bidirectional buck-boost power converters, electric starter generator system employing bidirectional buck-boost power converters, and methods therefor: A bidirectional buck-boost power converter 13 including a pair of inverter modules 14, 15 disposed at an output of a machine, and an inductor Lo connected between the pair of inverter modules 14, 15. A method for controlling a voltage output of a machine starter generator having an inverter rectifier...

20060103342 - Motor drive device for air conditioner: A motor drive device for an air conditioner has a converter, a three phase inverter and a control means. The converter uses an AC power source as an input source. The three phase inverter receives output voltage from the converter and outputs AC voltage to a motor for the air...

20060103343 - Device with controllable divider elements and control method: The device has at least one controllable divider element including a drive assembly guided within a track, the drive assembly being driven by an electric motor which is controllable by a central control unit and a local control unit, which units exchange data through an electric line located in the...

20060097670 - Vehicle driving system: A vehicle driving system in which one of front wheels and rear wheels is driven by an internal combustion engine and the other thereof is driven by an electric motor. The system is comprised of: a generating apparatus that generates electric power by rotation of the internal combustion engine; the...

20060097671 - Driving device and motor vehicle equipped with driving device: A driving device of the invention is mounted on a motor vehicle, where a sun gear, a carrier, and a ring gear of a planetary gear mechanism are respectively connected to a motor MG1, to an engine, and to a drive shaft and a motor MG2. The driving device has...

20060097672 - Electrostatic actuator and driving method thereof: The present invention provides an electrostatic actuator having a small power consumption and also provides a driving method thereof. The electrostatic actuator comprises first and second substrates having first and second stator electrodes formed thereon, respectively, and a movable section arranged between the first and second stator electrodes. The movable...

20060097673 - Ac power supplying apparatus for vehicles: An AC power supplying apparatus for vehicles includes a battery mounted within an interior of a vehicle, a direct current-alternating current (DC-AC) inverter including a plurality of switching elements that convert a direct current power source of the battery to an alternating current power source, an outlet mounted within the...

20060097674 - Motor driver: A motor driver drives a motor composed of a rotor and plural-phase windings that generate a magnetic field for rotating the rotor, including: a plurality of transistors that operate as switches for supplying current to the windings; a position detector operable to detect a rotational position of the rotor, based...

20060097675 - Self dust-off apparatus and method thereof: A self dust-off apparatus includes a fan and a controller. The fan, which can be driven to rotate clockwise or counterclockwise, is installed in a projector. The controller is employed to direct the rotational direction (clockwise or counterclockwise) of the fan. In the normal operation, the fan rotates to guide...

20060097676 - Electric power steering device: An electric power steering device to control a motor based on steering torque generated in a steering shaft and supply an auxiliary steering force conforming to the steering torque to the steering system. The device judges the state wherein the command current value computed based on steering torque and the...

20060097678 - Controller arrangement with adaptive non-overlapping commutation: A PWM controller for a direct current brushless motor comprising first and second windings includes a motor drive circuit receiving pulse width modulation control signals to drive the first and the second windings; and a control circuit having inputs coupled to the first and second windings to control a pulse...

20060097677 - Controller arrangement with automatic power down: A control circuit is described in which a single input terminal receives digital control signals and analog control signals. In accordance with the principles of the invention, the control circuit includes an automatic power down circuit to place the control circuit into a low power draw or “sleep” mode whenever...

20060097679 - Method of controlling startup current of motor and disk drive using the method: Provided is a method and apparatus for controlling a motor of a disk drive. The method is used to stably control the startup current of a motor by considering a voltage drop and the disk drive uses the method. The method includes managing power-on reset retry information generated during the...

20060097680 - Industrial optical shutter: A highly versatile optical shutter for industrial and scientific applications is disclosed. The has a aperture which defines a light path through the shutter, and a shutter vane or blade that is moved into and out of the light path using a precision, microprocessor controlled motor, such as a stepping...

20060097681 - Electrical phase compensation in bemf spindle motor control: A method and apparatus for compensating for the asymmetrical phases of a spindle motor in a disc drive are provided. With the apparatus and method, compensation values are learned by sampling speed data during a period of operation of the disc drive where the speed is stable and only one...

20060097682 - Actuated tether: A self-actuating robot or vehicle tether capable of moving itself, remaining free while traversing around obstacles, and free itself is disclosed. In a preferred embodiment of the invention, a valve is mounted to the tether or robot. An inflow conduit attached to or in the tether is connected to the...

20060097683 - Mobile robot: A mobile robot has a mobile mechanism, a swing mechanism and a control unit. The mobile mechanism is of a coaxial two-wheeled type and controls a forward thrust using inverted pendulum control. The swing mechanism actively swings an upper body laterally with respect to the mobile mechanism. A centrifugal force...

20060097684 - Origin adjusting device of industrial robot: In origin adjustment between two members which rotate relatively at a joint of an industrial robot, an origin adjustment apparatus is provided which is inexpensive and highly accurate and which requires extremely few man hours. In addition, an origin adjustment apparatus is provided which is so small in size as...

20060097685 - Controller of pulse width modulation signal-driven device, and method of reducing noise of the device: A controller of a pulse width modulation signal-driven device, includes: an instruction input of operating the pulse width modulation signal-driven device; a control section generating a control clock which operates the pulse width modulation signal-driven device; a frequency modulator frequency-modulating the control clock, to thereby give to the control clock...

20060097686 - Control system for synchronous machine: A control system for a synchronous machine including a converter for converting DC voltage to AC voltage or AC voltage to DC voltage. The synchronous machine is driven by the converter. The control system further includes a magnetic pole position presuming device for performing a presuming operation to presume a...

20060097687 - Variable speed motor control circuit: A control system and method for controlling the speed of a PSC motor having an auxiliary winding configured to provide torque for initial motor startup and a run winding configured to provide continuous motor operation. The motor is coupled to a capacitor configured to direct a portion of a current...

20060097688 - Start-up and restart of interior permanent magnet machines: A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based on the estimated initial speed. This...

20060097689 - Controller for a wound-rotor induction motor: A controller for a wound-rotor induction motor includes a first voltage-type converter connected to a secondary winding of the motor, a capacitor for smoothing DC output thereof, a second voltage-type converter to supply an AC power supply with regenerated secondary power, a speed detector of the motor, a secondary current...

20060091832 - Multiple engine locomotive configuration: In one embodiment, a multi-engine locomotive includes at least one converter to convert mechanical energy outputted by the engines to Direct Current (DC) electrical energy, a traction motor, and a DC bus connected to the engines, converter, and traction motor. The engines are configured to provide a power-per-length and/or power...

20060091833 - Motor drive system and process: A motor drive system includes a multi-output dc power source providing three or more output potentials, and a switching circuit including switching devices connected, respectively, with the output potentials of the multi-output power source. A controller determines a command apply voltage representing a desired voltage to be applied to the...

20060091835 - Electric motor control apparatus: An electric motor control apparatus suppressing power loss caused by driving an electric motor acting as a motor with a generated output of an electric motor acting as a generator. The electric motor control apparatus comprises a PAM controlled motor selecting unit (53) for determining which of “control pattern 1”...

20060091834 - Hoist with detachable power and control unit: A hoist is powered by a separate power unit. The hoist unit includes: a motor, a mounting connector, a spool, webbing, auto cut-off and a first portion of a mating electrical connector. The control unit includes a hollow pole, a hook, a second portion of the mating electrical connector, a...

20060091836 - Power output apparatus and vehicle including such power output apparatus: A first motor generator is linked to an engine and generates torque to start the engine. At time t1-t2 and time t3-t4, when current conducted to the first motor generator will exceed the upper limit value and the lower limit value due to the increase of the absolute value of...

20060091837 - Self-startup circuit for dc fan: A self-startup circuit for a DC fan includes a voltage sampling device receiving a first control signal, a comparator, and a self-startup device. The comparator includes two input terminals and an output terminal. One input terminal is connected to an output terminal of the voltage sampling device. The self-startup device...

20060091838 - Assembly for moving a barrier and method of controlling the same: An assembly for moving a barrier from one of a closed position and an opened position to the other of the closed position and the opened position. The assembly includes a motor to supply one of a first power and a second power to the barrier. The assembly also includes...

20060091839 - Method and apparatus for discrete speed compensated torque step motor control: Methods and apparatus for controlling a motor are provided. The motor may be operated in a fluid system having a variable static pressure acting on the motor. The method including operating the motor at a first substantially constant torque level, varying the static pressure of the system, receiving a torque...

20060091840 - Circuit configuration and method for controlling an electric motor, in particular of a washing machine: A circuit configuration for driving an electric motor, in particular of a washing machine, includes power switches connected to connection terminals of the electric motor and to a voltage intermediate circuit. A driver circuit is connected to the voltage intermediate circuit and to the power switches. A control unit, in...

20060091841 - Relay for a direct current electrical apparatus: An electric control device for the switching of an apparatus operating on direct current at a predetermined supply voltage includes an electromechanical relay having a changeover switch of the apparatus and at least two brush holders that form changeover switch contacts....

20060091842 - Factory line system for robot-arm work stations: A factory line system includes a series of robot arms arranged alongside a conveyor on which workpieces are transported. Each workpiece is fitted with a data carrier and each robot arm is fitted with a reader/writer that can wirelessly communicate with the data carrier of each workpiece when the latter...

20060091843 - Motor control system: A stepping motor control system according to the present invention includes a counting mechanism for counting the number of steps of the pulse train command, a latch mechanism for holding a counting value of the counting mechanism with a latch signal and finding a position command, a reference signal generating...

20060091844 - Driving method, driving mechanism, and image capturing apparatus: The driving method of the present invention is a driving method to drive a stepping motor driven by a predetermined driving pulse, by the servo driving method, and is characterized in that a predetermined sampling period is set, and the generation condition of the driving pulse to drive the stepping...

20060091845 - Control system and method for electric drives with a.c. motors: A vector-control system and method of a “sensorless” type for electric drives with a.c. motors is based upon generation of an oscillating magnetic field and upon measurement of the deviation, with respect to said oscillating field, of the flux generated thereby on account of anisotropy, whether natural or induced, of...

20060091846 - Operation of an electrical machine: An electrical machine is controlled without using a physical rotor position detector. Rotor position is estimated by an algorithm which receives feedback from a parameter which represents the behavior of a phase of the machine. Before the algorithm estimates position, it checks the value of the parameter to ensure that...

20060091847 - Method in connection with permanent magnet synchronous machines: A method for sensorless estimation of rotor speed and position of a permanent magnet synchronous machine the method comprising the steps of calculating first stator flux vector estimate ({circumflex over (ψ)}d,i+j{circumflex over (ψ)}q,i) using the flux model and measured stator currents, calculating second stator flux vector estimate ({circumflex over (ψ)}d,u+j{circumflex...