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Electricity: motive power systems May archived by USPTO category 05/12

20120133307 - Piezoelectric vibrator driving circuit: One embodiment provides a piezoelectric vibrator driving circuit for driving a piezoelectric vibrator, the piezoelectric vibrator having an equivalent circuit in which an LC series resonance circuit, an equivalent resistor Rx connected in series thereto and a damping capacitor Co connected in parallel to them are provided, the driving circuit... Agent: Fukoku Co., Ltd.

20120133308 - Linear vibration modules and linear-resonant vibration modules: The current application is directed to various types of linear vibrational modules, including linear-resonant vibration modules, that can be incorporated in a wide variety of appliances, devices, and systems to provide vibrational forces. The vibrational forces are produced by linear oscillation of a weight or member, in turn produced by... Agent:

20120133309 - Battery power system: A battery power system, adapted for driving a motor system of a power unit with respect to at least one power mode signal and at least one motor control signal generated from the motor system, which comprises: a battery pack, an electrolytic capacitor, a boost converter, a first contactor, a... Agent: Industrial Technology Research Institute

20120133310 - Reconfigurable battery: A reconfigurable battery has at least one bank of statically joined series connected battery cells, each cell including a positive and a negative pole. The poles connect through switches to respective output connections. Activating a set of processor controlled switches reconfigures at least some of the battery cells into a... Agent:

20120133311 - Motor magnetic pole position correction method: A motor magnetic pole position correction method includes preventing a movement of a movable element of a direct drive motor by mechanical brake (step S9), generating a command that designates a position spaced or separated from the present position (step S10), detecting a torque command value of the direct drive... Agent: Okuma Corporation

20120133312 - Methods and systems for automatic rotation direction determination of electronically commutated motor: A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower using the ECM and determining if the resulting blower rotation is indicative of the desired direction of rotation for... Agent: Rbc Manufacturing Corporation

20120133313 - System and method for estimating a generator rotor temperature in an electric drive machine: An electric drive machine includes an electric drive system including an internal combustion engine and an electrical power generator coupled to the internal combustion engine. An electronic controller is in control communication with the electric drive system and is configured to determine an estimated temperature of a rotor of the... Agent: Caterpillar Inc.

20120133314 - Vehicle system for controlling motor torque: A vehicle having a vehicle system is provided with a motor having a housing and a stator. The motor is configured to provide motor torque for vehicle propulsion. The vehicle system is also provided with at least one controller that is configured to receive input indicative of at least one... Agent: Ford Global Technologies, LLC

20120133315 - Automated shade control in connection with electrochromic glass: Automated shade systems may comprise motorized window coverings, sensors, and controllers that use algorithms to control operation of the automated shade control system. These algorithms may include information such as: 3-D models of a building and surrounding structures, shadow information, reflectance information, lighting and radiation information, information regarding one or... Agent: Mechoshade Systems, Inc.

20120133316 - Motor control circuit: A motor control circuit for a motor is provided. The motor control circuit drives the motor based on torque command data. The torque command data is output by adding speed error data output from a speed error detecting section based on a first reference clock and a speed pulse and... Agent: Minebea Motor Manufacturing Corporation

20120133317 - Speed adjustment circuit for a plurality of fans: A speed adjustment circuit for a plurality of fans includes a voltage input terminal, a plurality of speed control modules, and a fan tachometer. Each of the speed control modules includes a fan connector, a speed adjusting unit, and a detector switch unit. The speed adjusting unit includes a switching... Agent: Hong Fu Jin Precision Industry (shenzhen) Co., Ltd

20120133318 - Control apparatus, control method, and control program for elastic actuator drive mechanism: An abnormality determination unit that determines whether or not an output measurement unit is abnormal is provided, and whether or not the output measurement unit is abnormal is determined. When the output measurement unit is abnormal, an elastic actuator is controlled based on a desired internal state decision unit and... Agent:

20120133319 - Methods, systems, and devices for a motor control system: Systems, devices, and methods for controlling a motor are disclosed. A method may include determining a rotational direction of a motor from a pair of quadrature signals sent to a microprocessor. The method further includes adjusting an internal count stored in the microprocessor at each edge of each of the... Agent: Won-door Corporation

20120133320 - Electric machine and current source inverter drive system: A drive system includes an electric machine and a current source inverter (CSI). This integration of an electric machine and an inverter uses the machine's field excitation coil for not only flux generation in the machine but also for the CSI inductor. This integration of the two technologies, namely the... Agent: Ut-battelle, LLC

20120126728 - Integrated electric machine and silicon carbide power converter assembly and method of making same: An electric drive system comprising an electric machine comprising a rotor and a stator, a power converter electrically coupled to the electric machine and configured to convert a DC link voltage to an AC output voltage to drive the electric machine, and a single cooling loop, wherein the electric machine... Agent:

20120126729 - Method for sensorless operation of an ecm, and motor for carrying out: An electronically commutated motor (ECM) often employs a Hall sensor for reliable operation. Even when a Hall sensor is omitted from a motor having a plurality of stator winding phases (24, 26) and a permanent-magnet rotor (22), one can reliably detect direction of rotation of the rotor by the steps... Agent: Ebm-papst St. Georgen Gmbh & Co. Kg

20120126730 - Method for sensorless operation of an ecm, and motor for carrying out: An electronically commutated motor (ECM) often employs a Hall sensor for reliable operation. Even when a Hall sensor is omitted from a motor having a plurality of stator winding phases (24, 26) and a permanent-magnet rotor (22), one can reliably detect direction of rotation of the rotor by the steps... Agent: Ebm-papst St. Georgen Gmbh & Co. Kg

20120126731 - Brushless electric motor or generator in shell construction: The invention relates to an electric motor having at least two stators disposed coaxially to each other and a rotor, wherein each stator has 2*n poles, with n=1, 2, 3, . . . , wherein each stator has at least one common coil or winding for all poles, wherein each... Agent:

20120126732 - Motor driver and vehicle using the same: A motor driver includes a control portion, for performing variable control on a torque or rotation speed of a motor through a control signal; and an output mode selection circuit, for sending an indication to the control portion when the control signal is abnormal, so that the motor enters an... Agent: Rohm Co., Ltd.

20120126734 - Alternating current chopper circuit with low noise: An alternating current chopper circuit with low noise is disclosed. The circuit includes a switching circuit, a first freewheel circuit, and a second freewheel circuit. The switching circuit has a control switching unit, which turns on and or off accordingly to a control signal. The first freewheel circuit and the... Agent: National Formosa University

20120126733 - High power-density, high back emf permanent magnet machine and method of making same: An electric drive system includes a permanent magnet machine having a rotor and a stator and a power converter electrically coupled to the permanent magnet machine and configured to convert a DC link voltage to an AC output voltage to drive the permanent magnet machine. The power converter includes a... Agent:

20120126735 - Dead-time generating circuit and motor control apparatus: A dead-time generating circuit includes a constant current circuit; a current generating circuit generating a capacitor-charge current; and a control circuit receiving a dead time control signal and a comparator signal. The control circuit generates a dead time generating signal based on the dead time control signal and the comparator... Agent:

20120126736 - Bootstrapped high-side driver control without static dc current for driving a motor bridge circuit: A motor driver circuit for driving the gate node of a high-side driver transistor to a boosted voltage from a charge pump draws little or no static current from the charge pump. The gate node is pulled to the boosted voltage by a p-channel pullup-control transistor that is driven by... Agent: Hong Kong Applied Science & Technology Research Institute Company Limited

20120126737 - Automated shade control system: Automated shade systems comprise motorized window coverings, sensors, and controllers that use algorithms to control operation of the automated shade control system. These algorithms may include information such as: 3-D models of a building and surrounding structures, shadow information, reflectance information, lighting and radiation information, ASHRAE clear sky algorithms, log... Agent: Mechoshade Systems, Inc.

20120126738 - Rotating machinery condition monitoring using position sensor: Continuous monitoring and fault diagnosis of rotating machinery during variable speed operation is performed using only a position feedback signal. The position sensor generates a periodic waveform having multiple pulses per revolution of the machine. A circuit is included to detect, for example, a zero crossing or edge of the... Agent:

20120126739 - Method and device for controlling inductive loads: Control circuitry for inductive loads comprehending a DC power source (DC), electrical switches (A and R) and appropriate electrical conductors to direct current to an inductive load, as the control system includes a primary circuit and a secondary circuit which is partly concurrent with the primary electrical circuit. The primary... Agent: A-t Holding Da

20120126740 - Permanent magnet motor with field weakening: A permanent-magnet electrical machine is disclosed in which the rotor has a fixed back iron and movable back iron segments. When the movable back iron segments are in a first position, such as in contact with the fixed back iron, the field strength is high. When the movable back iron... Agent: Current Motor Company, Inc.

20120126741 - Low-inductance, high-efficiency induction machine and method of making same: An electric drive system includes an induction machine and a power converter electrically coupled to the induction machine to drive the induction machine. The power converter comprising a plurality of silicon carbide (SiC) switching devices. The electric drive system further includes a controller that is electrically coupled to the power... Agent:

20120119683 - Power supply device for electric vehicle: The present invention provides a power supply device for an electric vehicle that allows highly efficient operation of a compressor inverter. A power supply device for motor vehicle 10 has: a main circuit 13 having a power source 11, a DC-DC converter 18, and a main inverter 17 that drives... Agent: Panasonic Corporation

20120119684 - Spherical ultrasound motor and control method for a spherical ultrasound motor: A substantially spherical rotor can be controlled with accuracy even in a relatively low speed rotation. In controlling rotational motions of a rotor 3 of a spherical ultrasonic motor 1, phases of voltages to be applied to three stators 9a, 9b, 9c are determined to set the direction of a... Agent: National University Corporation Tokyo University Of Agruculture And Technology

20120119685 - Power transducer: The performance of a power transducer is improved while efficiently using a power semiconductor also by managing the permissible duty factor of the power semiconductor in the regenerative braking circuit provided in the power transducer. The user is allowed to set, through an operation panel provided on the power transducer,... Agent: Hitachi Industrial Equipment Systems Co., Ltd

20120119686 - Method for controlling a motor: A method for controlling a motor by an inverter and by a vectorial technique, comprising the following steps: determining the value of a quadrature current Iq necessary for said motor to generate the desired torque; calculating the value of a direct current to be supplied to the motor by an... Agent: Reel S.r.l.

20120119687 - Brushless motor driver and brushless motor system: The brushless motor driver includes a sample and hold circuit which samples and holds a first value of the first comparison signal in a first case in which a current is forced to flow from a first phase coil of the three-phase brushless motor to a second phase coil and... Agent: Kabushiki Kaisha Toshiba

20120119688 - Control board, inverter device and integrated-inverter electric compressor: An object is to provide a control board, an inverter device, and an integrated-inverter electric compressor that are capable of improving electromagnetic compatibility (EMC property) and improving reliability against input/output of electromagnetic noise, which shows a tendency towards greater complexity and intensity. A control board (21) to which two power... Agent: Mitsubishi Heavy Industries, Ltd.

20120119689 - Motor control system: An amount of a rotational angle corresponding to a half of a play (included in an insert-fit coupling device having a maximum production tolerance) is set as a correction amount. When a shift range is changed to a target range, a target rotational angle for an output shaft corresponding to... Agent: Denso Corporation

20120119690 - Synchronous electric motor drive system: A synchronous motor drive system improves the design flexibility regarding torque characteristics as compared with conventionally available design flexibility. A synchronous motor has a rotor and a stator. Each of at least two adjacent stator teeth has a slit formed at the tip thereof. Each of a plurality of stator... Agent:

20120119691 - System for a linear drive: A system, whereby drive units on a movable part, e.g., a turntable or linear drive, are powered in a contactless manner via, in each instance, an inductive coupling to one or more primary conductors.... Agent:

20120112669 - Power converting apparatus for electric motor vehicle propulsion: A power converting apparatus for electric motor vehicle propulsion is provided that is suitable for a use in which power regeneration from an inverter unit to a power storing unit or power supply from the power storing unit to the inverter unit is frequently used. The apparatus includes a converter... Agent: Mitsubishi Electric Corporation

20120112670 - Vacuum cleaner and method for controlling an electric motor: A vacuum cleaner and a method for controlling the motor power of a vacuum cleaner are disclosed. The vacuum cleaner comprises an electric motor and an electric power supply for providing electric power to the electric motor. Furthermore, a voltage measuring means for measuring a motor voltage over the electric... Agent:

20120112672 - Rotation angle calculation apparatus and rotation angle calculation method: A control apparatus using a multipole resolver for calculating the rotation angle of a motor includes an acquisition unit, a learning unit, a calculation unit, and a correction unit. The acquisition unit acquires a detected angle θ detected by the multipole resolver. The learning unit learns the waveform of an... Agent: Toyota Jidosha Kabushiki Kaisha

20120112673 - Motor controller: A motor controller is disclosed. The motor controller includes a current detector that is provided in a direct current side of a power converter and that detects direct current information. A determiner determines a size of an offset voltage contained in the detected current information. The determiner calculates the offset... Agent: Kabushiki Kaisha Toshiba

20120112674 - Control of a traction power inverter module in a vehicle having an electric traction motor: A method for controlling a traction power inverter module (TPIM) in a vehicle includes determining a commanded output torque of the motor using a controller. The method further includes controlling the TPIM and motor using a discontinuous pulse width modulated (DPWM) signal when the commanded output torque is less than... Agent: Gm Global Technology Operations LLC

20120112671 - Power-consumption calculating method of motor driving device, and control method of motor driving device using the power-consumption calculating method: Accurate power consumption is calculated without raising cost, or making the device bigger. Power consumption (P) upon driving a motor is calculated from an input voltage (Vdc), a switching duty factor of a switching device (Sw1) of a chopper circuit (ch), which is provided with the switching device (Sw1) and... Agent: Meidensha Corporation

20120112675 - Sensorless safety system for determining rotation of an electric household appliance laundry drum powered by a three-phase asynchronous motor: An electric household appliance (1) having a casing (2); a laundry drum (3) mounted inside the casing (2) to rotate about an axis of rotation; a three-phase asynchronous motor (6) for rotating the laundry drum (3); and a sensorless safety system (7) for determining rotation of the rotor (32), to... Agent: Electrolux Home Products Corporation N.v.

20120112676 - Roatry position encoding method and unit: A unit of absolute rotary position encoding, where the angular range of encoding is matched to the number of poles of an electrical motor it is intended that the encoder is to be attached to. The electrical motor is suitably a brushless DC motor. This provides unique rotational position values... Agent:

20120112677 - Method and device for detecting an entrapment situation: To detect an entrapment situation when a driven component is adjusted using a mechanical adjustment system which has an electric motor (2), a value (Fakt) relating to the force acting upon the driven component is compared with a threshold value (FTh) relating to a reference value (FRef). The reference value... Agent:

20120112678 - Fan speed control circuit: A fan speed control circuit includes a first fan, a second fan, a first temperature sensor, a second temperature sensor, a PWM regulator, and a driving module. The first temperature sensor senses a temperature of the first component to generate a first temperature signal. The second temperature sensor senses a... Agent: Hong Fu Jin Precision Industry (shenzhen) Co., Ltd.

20120112679 - Fan rotary speed controlling device: A fan rotary speed controlling device includes a first signal generating circuit, a second signal generating circuit, a pulse width modulation (PWM) circuit and a switching circuit. The first signal generating circuit receives a real frequency signal and a target frequency signal, and generates a first signal according to the... Agent:

20120112681 - Current limiting for a motor winding: Techniques and apparatus for limiting the current through a motor, such as a motor for rotating a rotatable element of a hard drive. The current can be limited based on a threshold. A first threshold value can be set for a first time period. A second threshold value can be... Agent:

20120112680 - Electric machine system including an alternating electric current (ac) electric machine having a switch module: An electric machine system includes an alternating current (AC) electric machine. The AC electric machine includes a machine housing having a machine portion and a switch portion. A stator is fixedly mounted in the machine portion of the machine housing and a rotor is rotatably mounted relative to the stator.... Agent: Remy Technologies, L.L.C.

20120112682 - Method for detecting blockages of electrically commutated electric motors:

20120112683 - Washing machine with improved method of braking to a non-zero speed: A method of braking a washing machine from an operational speed to a reduced non-zero speed is provided (as well as a washing machine incorporating the method) for a washing machine driven by one of a synchronous or asynchronous motor. Upon receipt of a speed reduction signal, the motor rotating... Agent: General Electric Company

20120104978 - Device for resonantly driving a micromechanical system: A device is provided for resonantly driving a micromechanical system, which includes at least one seismic mass supported by spring vibrations, at least one drive for driving the vibration of the seismic mass and at least one element that is motionally coupled to the seismic mass. Furthermore, the device includes... Agent:

20120104979 - Phase change pulse engine: A phase change pulse engine includes a superconducting magnet and a control circuit including a power supply and a capacitor. A changing magnetic field creates a magnetic coupling for a mechanical drive. The capacitor is connected to the power supply and the magnet's coil through a switching and timing control... Agent:

20120104980 - Switched reluctance and pm brushless dc motor drive control for electric vehicle application: A method of operating an electrical machine having first and second phase windings. The method includes: (1) applying positive first current to the first phase winding while the first phase winding's back electromotive force (emf) is positive; (2) applying negative second current to the first phase winding while the first... Agent:

20120104983 - Work machine and brushless motor: An electric grasscutter includes a motor (50) which drives a rotary blade (42). The motor (50) is a brushless motor accommodated in a motor housing (51) and including a rotor (53) provided integrally with an output shaft (52), and a stator (54) fixed to the motor housing (51). A motor... Agent:

20120104984 - Power factor correction circuits for switched reluctance machines: An electrical device has a capacitive storage element and first and second switches. The capacitive storage element and first and second switches are interconnected such that when interconnected with a direct current (dc) voltage supply and first and second windings of an electrical machine: (1) a first operational state exists... Agent:

20120104981 - Driving device of brushless dc motor for fan: A driving device is electrically connected with an AC power and a brushless DC motor for a fan. The driving device includes a rectifier unit, a filter unit, a switch power conversion unit and a control unit. The rectifier unit receives the AC power and rectifies the AC power. The... Agent:

20120104982 - Rotor lamination shaping for minimum core loss in srms: An electrical machine rotor includes a flux-conducting portion and a flux-inhibiting portion. The flux-conducting portion is conducive to conveying an electromagnetic flux and has a plurality of salient rotor poles and a portion of back material. The flux-inhibiting portion is less conducive to conveying an electromagnetic flux than the flux-conducting... Agent:

20120104985 - Stepping motor drive unit: In a stepping motor drive unit which drives a stepping motor including coils having a plurality of phases, and has functions of causing both ends of one of the coils having one of the plurality of phases to have high impedance to detect an inductive voltage in the coil, and... Agent:

20120104987 - Method of controlling current of high-speed switched reluctance motor: Disclosed herein is a method of controlling the current of a high-speed Switched Reluctance Motor (SRM) using an inverter circuit including a first switching element, a second switching element, a first diode, a second diode and a reactor, wherein the first switching element and the first diode, the second diode... Agent:

20120104986 - Torque control method for high-speed switched reluctance motor: Disclosed herein is a torque control method for a high-speed Switched Reluctance Motor (SRM), which controls a torque in the high-speed operation of a 2-phase SRM. In the torque control method for a high-speed SRM, a positive torque (T*mA) of an active phase (A phase) of the two phases of... Agent:

20120104988 - High power density srms: A power converter having a first switch and a first unidirectional current device that conducts current unidirectionally. The first switch and first unidirectional current device are interconnected such that when interconnected with a dc voltage supply, battery, and first phase winding of an electrical machine: (1) a first operational state... Agent: