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Electricity: motive power systems November recently filed with US Patent Office 11/11

20110285328 - Electric motor assist bicyle: Methods, systems and apparatus for an electric motor assist bicycle having a hub motor mounted to the front or rear hub to provide electric motor assist, and to function as a generator to charge batteries. The motor can be either a molded or wound magnetic flux channel transverse wound stator... Agent:

20110285330 - Driver circuit and method for controlling a capacitive element: The disclosure pertains to a method of charging or discharging a capacitive element, such as a piezoelectric crystal. The disclosure also pertains to a device that implements charging of a capacitive element according to said method. The device comprises a bipolar buck-boost converter, whereby a capacitive element can be charged... Agent: Mindray Medical Sweden Ab

20110285329 - Method and device for controlling the rotation speed of a piezoelectric motor rotor: The present invention relates to a method of controlling the speed of rotation of a piezoelectric motor comprising at least one step of determining the variation of the speed of rotation as a function of the frequency of the excitation voltages of the piezoelectric motor for the actual temperature of... Agent: Sagem Defense Securite

20110285331 - Oscillator circuit with frequency sweep function: With an oscillator circuit with a frequency sweep function, a first counter counts a reference clock for a number of counts that corresponds to a digital first setting signal, and generates a first count completion signal which is asserted on completion of the count. A D/A converter converts a digital... Agent: Rohm Co., Ltd.

20110285332 - Controller for electrical machines: The present invention relates to control of electrical machines and in particular, though not exclusively, to control of synchronous machines such as hybrid stepping motors, flux switching machines and brushless permanent magnet motors and generators. A sensorless control system for an electrical machine is provided comprising a rotor, a stator... Agent: Technelec Ltd

20110285333 - Motor drive unit: A motor drive unit includes a position detection section configured to detect a rotor position by detecting a zero cross of a counter electromotive voltage during a de-energizing period to output a position detection signal, a current waveform generation section configured to generate, based on a torque command signal and... Agent:

20110285334 - Method for operating a brushless motor: The present invention relates to a method for operating a brushless electric motor whose windings are driven by an inverter with the aid of six switches, having an identification unit being provided in order to identify defective switches, a unit for voltage measurement at the outputs of the inverter, and... Agent: Continental Automotive Gmbh

20110285335 - Motor drive device: A motor drive device includes an inverter circuit, a driver circuit for outputting a PWM signal to the inverter circuit, a booster circuit for boosting a power supply voltage supplied from a power supply circuit, a fail safe circuit arranged between the inverter circuit and the motor, and a fail... Agent: Omron Automotive Electronics Co., Ltd.

20110285336 - Semiconductor module device and driving apparatus having the same: A controller has a control board, a power module and a power board. MOS transistors, inverter input terminals, coil terminals, inverter ground terminals, control terminals, a control power input terminal and a control ground terminal are integrally molded in a molded portion of a power module. Electrical connections between the... Agent: Denso Corporation

20110285337 - Control device of a synchronous motor: A control device of a synchronous machine is disclosed. The control device includes an inverter configured to provide an output current to a synchronous machine. A controller configured to control the output current and to estimate a voltage command, at least in part, by using pulse width modulation to choose... Agent:

20110285338 - Torque amplifier apparatus: A torque amplifying apparatus mounted to a non-driven component of a vehicle comprises a plurality of permanent armature magnets and a plurality of electromagnets, the permanent armature magnets arranged to interact with the plurality of electromagnets. The interaction of the electromagnets and the permanent armature magnets causes a repulsion force,... Agent:

20110285339 - Heat removal from motor components: An electrical machine having a rotor component configured to rotate with respect to a stator component includes a sensing arrangement to sense electrical, magnetic, and/or mechanical machine parameters during machine operation. The electrical machine also includes a fluid sprayer coupled to a cooling controller. The cooling controller activates the fluid... Agent: Searete LLC, A Limited Liability Corporation Of The State Of Delaware

20110285340 - Servo control device: Improved precision is realized in positioning control. Provided is a servo control device that is applied to a numerical control equipment provided with a screw-feeding section that converts rotational movement of a motor to linear movement, a driven section that is linearly moved by the screw-feeding section, and a support... Agent:

20110285341 - Method and device for an induction motor start: p

20110285342 - Methods and systems for induction motor control: A method is provided for controlling an induction motor having a rotor. The method includes receiving a torque command; comparing the torque command to a threshold torque value; generating, with a first estimation module, a first estimated rotor resistance when the torque command is less than or equal to the... Agent: Gm Global Technology Operations, Inc.

20110279066 - Method and device for controlling a solid body actuator: In a discharge process of the solid body actuator (2), a current that discharges the solid body actuator (2) loaded with electrical energy is detected. A switching element (6) is switched from an open position to a closed position to short circuit the solid body actuator (2) for removal of... Agent:

20110279067 - Drive control circuit for linear vibration motor: In a drive control circuit of a linear vibration motor, a differential amplifier circuit includes an operational amplifier in which an P-channel type transistor is used as a transistor that receives an input voltage, and the differential amplifier circuit detects an induced voltage occurring in a coil. Before the H-bridge... Agent: On Semiconductor Trading, Ltd.

20110279068 - Drive control circuit for linear vibration motor: In a drive control circuit of a linear vibration motor, a drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates a drive current in response to the drive signal generated by the drive... Agent: On Semiconductor Trading, Ltd.

20110279069 - Drive control circuit for linear vibration motor: In a drive control circuit of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running, after the running of the linear vibration motor has terminated; this drive signal of opposite phase... Agent: On Semiconductor Trading, Ltd.

20110279071 - Control device for ac motor: An overmodulation PWM control unit includes a voltage amplitude calculating unit for calculating a voltage command amplitude of an original voltage command based on current feedback control, a voltage amplitude correcting unit performing linear compensation on the voltage command amplitude so that a fundamental amplitude of a pulse width modulation... Agent: Toyota Jidosha Kabushiki Kaisha

20110279072 - Motor driving circuit: First and second A/D converters perform analog/digital conversion of first and second signals of a Hall signal so as to generate third and fourth signals as digital signals. A differential conversion circuit generates a fifth signal as a single-ended signal that corresponds to the difference between the third and fourth... Agent: Rohm Co., Ltd.

20110279070 - Motor driving device and electric equipment using the same: Brushless DC motor (4) is driven based on a first or second waveform signal output from operation switching unit (11), which switches output so that a first waveform signal by first waveform generation unit (6) is output when the speed of rotor (4a) is determined to be lower than a... Agent: Panasonic Corporation

20110279073 - Method for operating an electronically commutated electric motor and apparatus therefor: The invention relates to a method of controlling the run-up of an electronically commutated electric motor (1) to drive a tool. A rotor 7 rotates in the rotating field (21) of the stator (2). The field windings (3, 4, 5) alternately have a supply voltage applied thereto via an actuation... Agent:

20110279074 - Electric motor stator winding temperature estimation systems and methods: An electric motor system includes an electric motor comprising a stator with windings and a rotor configured to operate at a motor speed; a cooling system comprising coolant configured to cool the rotor and the stator, the coolant having a coolant flow rate and a coolant temperature; an inverter module... Agent: Gm Global Technology Operations, Inc.

20110279075 - Method and module for controling rotation of a motorized spindle: In a method and module for controlling rotation of a motorized spindle driven by a driving unit, a sensing unit senses vibration of the spindle and generates a voltage signal corresponding to the vibration of the spindle. A processing unit receives the voltage signal from the sensing unit, generates an... Agent: Buffalo Machinery Company Limited

20110279076 - Electric motor, and device for generating a signal for controlling the same: An evaluation unit (440) is provided for evaluating the modulated control signal (PWM_mod). The unit is configured to extract, from the modulated control signal (PWM_mod), data provided for operation of the motor (110). The control apparatus includes a signal generator (450) configured to generate, on the basis of the extracted... Agent:

20110279077 - Apparatus equipped with motor: An apparatus includes a driven member, a DC brushless motor, a first signal generation unit configured to output a first signal according to rotation of the DC brushless motor and to change an output value of the first signal each time the DC brushless motor rotates by a predetermined amount,... Agent: Canon Kabushiki Kaisha

20110273116 - Driving circuits, power devices and electric devices including the same: A power device includes a switching device and a control unit. The switching device has a control terminal and an output terminal. The control unit is configured to control a rising time required for a driving voltage for controlling the switching device to reach a target level such that a... Agent: Samsung Electronics Co., Ltd.

20110273117 - Reciprocating electric tool: The invention provides a reciprocating electric tool (1) having a brushless motor (3), a plunger (52), and control means (6). The plunger (52) is driven by the brushless motor and reciprocating between two dead centers. A end bit (7) is mounted to one end of the plunger in a reciprocating... Agent: Hitachi Koki Co., Ltd.

20110273119 - Control device and method for controlling an electronically commutated motor, and motor: The invention relates to a control device for controlling an electronically commutated motor. The control device comprises a control input for a rotor position signal and a control output for connection to field coils of the motor. The control device is designed to generate a load current for displacing a... Agent: Robert Bosch Gmbh

20110273120 - Pwm control circuit and pwm control method: The PWM control circuit includes a polarity determination unit, a full wave rectification unit, an adjustment unit that generates an adjusted waveform signal by adjusting waveform of the full wave rectification signal, and a carrier signal generating unit that generates a fixed frequency carrier signal. The PWM control circuit further... Agent: Seiko Epson Corporation

20110273121 - Electric machine component temperature monitoring: Embodiments of the invention provide an electric machine module including a module housing. In some embodiments, the module housing can at least partially define a machine cavity into which an electric machine can be positioned. The electric machine can include a rotor assembly comprising a plurality of laminations and a... Agent: Remy Technologies, LLC

20110273122 - Motor drive device: A motor drive device has an inverter circuit, in which at least three sets of a pair of upper and lower arms including a semiconductor switching element on an upper arm and a lower arm is arranged, for supplying voltage to a motor based on ON/OFF operation of each semiconductor... Agent: Omron Automotive Electronics Co., Ltd.

20110273124 - Low cost blender control permitting low actuation force switches: A control circuit for a blender provides low-cost power conditioning through the use of a high resistance which provides temporary power for operation of low-voltage logic circuitry and low-voltage switches for a time sufficient to switch the motor on, and a lower resistance which provides sufficient power for maintaining the... Agent: Illinois Tool Works Inc.

20110273123 - Power supply system and method for controlling a mechanically commutated electric motor: The invention relates to a method for providing a trigger signal in response to the commutation of a mechanically commutated electric motor (1). The method comprising the steps of providing a mechanically commutated electric motor (1), providing a power supply for said mechanically commutated electric motor via electrical supply leads... Agent: Ideassociates (iom) Limited

20110273118 - Power factor correction circuit: A power factor correction circuit has a semiconductor integrated circuit and at least one very low Rds(on) MOSFET. The circuit also includes a silicon carbide diode for zero reverse recovery current.... Agent:

20110273125 - Controller for ac electric motor and electric powered vehicle: An AC electric motor, an inverter and a controller are mounted on an electric powered vehicle. The controller includes a voltage deviation calculating unit, a modulation factor calculating unit, and a mode switching determination unit. The voltage deviation calculating unit calculates a voltage deviation between a first voltage command when... Agent: Toyota Jidosha Kabushiki Kaisha

20110273126 - Robotic drive control: A robotic device includes an electric motor in which a drive control circuit includes a driver circuit for intermittently supplying the magnetic coils with a supply voltage VSUP; a switching signal generating circuit that generates a switching signal supplied to the driver circuit; and a voltage setter that supplies a... Agent: Seiko Epson Corporation

20110273127 - Valve control device: In opening/closing control for the valve mechanism to which the return torque is applied in an opening direction or a closing direction of the valve, provided are a position control system for outputting a q-axis current command based on a position deviation between a target position command directed to the... Agent: Mitsubishi Electric Corporation

20110273128 - Synchronous motor and system for driving synchronous motor: Disclosed are a synchronous motor having reduced torque ripple while having a high torque and system for driving the synchronous motor. The synchronous motor comprises a rotor (2) and a stator (3), and U-phase coils (91; 91a, 91b, and the like), V-phase coils (92; 92ab, and the like), and W-phase... Agent:

20110266982 - Motor control: A system includes a power supply output sensor that senses an output level of a power supply during active motor control of a motor using the power supply and generates a signal indicative thereof. The motor regenerates energy and the power supply absorbs energy regenerated by the motor. The system... Agent: Analogic Corporation

20110266983 - Motor driving circuit capable of outputting dual frequency generator (fg) signal: A motor driving circuit capable of outputting a dual FG signal includes a control unit, a first Hall unit, a second Hall unit and a logic unit. The control unit is electrically connected to the first Hall unit and configured to generate a first FG signal based on a Hall... Agent:

20110266986 - Fault detection method for electric motors with one or several star points: A detection and control device is provided for detecting a motor fault of an electric motor with star point topology, with an evaluation unit, a control unit, and a return unit. The return unit is configured for returning a star point potential of the electric motor to the evaluation unit,... Agent: Airbus Operations Gmbh

20110266985 - Method and device for monitoring the startup of an electric drive: A method and a device for monitoring the startup of an electric drive, which has a polyphase machine, a pulse-controlled inverter and a control unit. The control unit is provided to compare rotational speed values that are successive in time to one another during the startup of the drive, and... Agent:

20110266984 - Power drive control device and power device: A power drive control device is provided, in which, even if drive of a synchronous motor becomes impossible due to abnormalities of a control circuit for controlling the synchronous motor, it is possible to perform the drive control of the synchronous motor concerned easily with a simple configuration as emergency... Agent: Renesas Electronics Corporation

20110266987 - Synchronous disturbance suppression in a variable speed motor drive: A variable speed drive for an electric motor has an inverter for receiving pulse width modulation controls. The inverter communicates power signals to a poly-phase electrical motor. A resolver communicates signals from the poly-phase motor back to a motor control. The motor control includes a speed control, a field-oriented control,... Agent:

20110266988 - Output filter and power conversion apparatus having the same: Provided are an output filter and a power conversion apparatus having such an output filter. The output filter is configured by a neutral point detector with a reduced size and having no common mode inductance occurring by making inductances in coils of respective phases equal.... Agent: Kabushiki Kaisha Yaskawa Denki

20110266989 - Motor system: A motor system comprises a motor and a driving module. The motor has a plurality coil units not electrically connected to each other. The driving module has a control unit, a driving unit and a circuit board. The control unit is coupled to the driving unit. The driving unit has... Agent:

20110266990 - Drive unit, image forming apparatus incorporating same, peripherals incorporating same, and control method therefor: A drive unit, which can be included in an image forming apparatus with peripherals disposed thereto and use a control method therefore, includes an inner rotor brushless DC motor, a driver, a rotation detector, and a controller. The driver supplies power to drive the brushless DC motor. The rotation detector... Agent: Ricoh Company, Ltd.

20110266991 - Seat adjusting device: A seat adjusting device for an automobile seat (1) having an electric motor (11) for generating a drive motion, wherein the electric motor is operationally coupled to a gearbox (13) for transmitting the drive motion thereof, the gearbox having a gearbox housing (19) in which gearbox elements are disposed for... Agent:

20110266992 - Power conversion device: A power conversion device includes a power switching circuit that has a plurality of series circuits in each of which a switching element that operates as an upper arm and a switching element that operates as a lower arm are connected in series, and a control circuit that generates control... Agent: Hitachi, Ltd.