Electricity: motive power systems inventions 08/09

20090212724 - Method for braking an ac motor: A system for braking a motor. The system includes at least one resistor and a contactor connected to the at least one resistor and a motor. The system further includes a variable frequency drive electrically connected to the motor, wherein the variable frequency drive comprises a controller operably connected to... Agent: Siemens Corporation Intellectual Property Department

20090212727 - Actuating drive and method for operating an actuating drive: The invention relates to a method for operating an actuating drive having an electrically commutated motor 1 for adjusting an actuating member, having a position sensor 6 for detecting the rotary angle position of the rotor of the motor or of an element which can be driven in a rotatable... Agent: King & Spalding LLP

20090212726 - Device for protecting a speed controller against overcurrent: e

20090212725 - Drive system and method for operating a drive system for an electronically operated vehicle: The invention relates to a drive system for an electrically driven vehicle, comprising an electric drive unit (4), a first power source circuit (1) comprising a control unit (14), which outputs controllable power, a second power source circuit (2), which can be charged and discharged and which is connected in... Agent: R. Danny Huntington Bingham Mccuthen

20090212728 - Wheel driving apparatus and electric vehicle including the same: An electric bike includes a wheel driving apparatus. The wheel driving apparatus includes an electric wheel drive motor which drives a wheel, a gap changer which changes a gap length in the wheel drive motor, and a motor control unit which controls the wheel drive motor and the gap changer.... Agent: Yamaha Hatsudoki Kabushiki Kaisha C/o Keating & Bennett, LLP

20090212729 - Method and device for controlling load and voltage in voice coils: A method for sensing and compensating for variances in load and voltage in a closed loop voice coil system (95) is described. A load (55) in a system (95) which included a supply voltage (45) and the load (55), which includes an inductive element, is excited with a known duty... Agent: Harrington & Smith, Pc

20090212730 - Control system for a controllable permanent magnet machine: A dynamoelectric machine that has at least one rotor component proximate a stator that is axially displaceable from the stator in response to pressure of lubrication oil delivered to its lubrication system has a system for changing axial displacement of each axially displaceable rotor component from the stator to cause... Agent: Stephen George Mican

20090212731 - Robot control system comprising a portable operating device with safety equipment: A robot controller including a control unit and a portable operating device (TPU) for teaching and manually operating the robot. The TPU includes safety equipment, a safety TPU-part having a first communication unit and a main TPU-part having a third communication unit. The control unit includes a safety control part... Agent: Venable LLP

20090212732 - Universal adaptive torque control for pm motors for field-weakening region operation: The invention includes a motor controller and method for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by, among other things, receiving a torque command, determining a normalized torque command by normalizing the torque command to a characteristic... Agent: Fletcher Yoder Law (for Rockwell Automation)

20090212733 - To obtain the three-phase current via adjusting width of pulses with single dc-link current sensor: After an AC motor generates a three-phase current, modulate the three-phase current to generate an original voltage space vector, and add three detecting vectors with a sum of zero after the original voltage space vector. While adding the three detecting vectors, sample the current to generate a sampling result. Then... Agent: North America Intellectual Property Corporation

20090212734 - Torque limit of pm motors for field-weakening region operation: The invention includes a motor controller and technique for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by receiving a torque command, determining a physical torque limit based on a stator frequency, determining a theoretical torque limit based... Agent: Fletcher Yoder Law (for Rockwell Automation)

20090206777 - High torque movable barrier actuation at low speeds utilizing a hub motor: The present invention is a system for high torque operation of a movable barrier utilizing a compact hub motor device, which may be directly coupled to a movable barrier without the use of additional gearing systems. The flat geometry provides high dynamic acceleration with short electrical and mechanical time constants,... Agent: Jafari Law Group, P.C.

20090206778 - Control apparatus for linear compressor: The present invention discloses a control apparatus for a linear compressor which can vary a cooling force and prevent an inrush current. The control apparatus for the linear compressor includes a coil winding body laminated on the linear compressor, a first capacitor connected in series to the coil winding body,... Agent: Mckenna Long & Aldridge LLP

20090206779 - Motor vehicle: A system and method for operating, or electrically communicating with, an electrical supply network are disclosed. A vehicle is coupled to the electrical supply network, a trigger causes a partial discharge of an electrical energy storage device of the vehicle into electric power network, discharging electrical energy into the electric... Agent: Seed Intellectual Property Law Group PLLC

20090206780 - Method and device for operating a synchronous machine: According to the invention, estimated values (id (EST), iq (EST)) of the motor currents of a synchronous machine are determined by an observer in a co-ordinate system that rotates together with a rotor, independently of the target values (ud, uq) of electric voltages of the synchronous machine (PMSM) in the... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090206782 - Control device and control method: The invention relates to a control device and a control method which enhance accuracy in detecting a speed of a driven body to stably control drive means. An encoder signal control section (25) compares lengths of time between a rising measurement time kept by a rising edge interval counting section... Agent: Birch Stewart Kolasch & Birch

20090206781 - Alternating current motor drive circuit and electric vehicle drive circuit: A current source rectifier is provided at an output of an alternating current generator, an alternating current motor is connected to an output of the rectifier via a voltage source inverter, furthermore, two arms having switching elements connected in inverse parallel to diodes are connected to the output of the... Agent: Rossi, Kimms & Mcdowell LLP.

20090206783 - Soft start for electric motor of a power tool: A power tool has an electric motor with field windings. In an aspect of the invention, each field winding includes two coils wound with the same number of turns of the same gauge magnet wire. When the motor is first energized, the two coils of each field winding are connected... Agent: Harness, Dickey & Pierce, P.L.C

20090206784 - Safety device for power window: A storage unit that stores a change rate of pulse width of continuous pulses, which is detected by a pulse width detector during raising operation of the window glass in a reference condition, while relating the change rate to window position information given by a window position counter; a calculation... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090206785 - Waveform current monitor using rdson of low-side bridge fet: An apparatus for monitoring current for a motor drive including at least high-side and low-side switching transistors includes a driver circuit for driving a gate of the low-side switching transistor. First circuitry measures a drain to source voltage across the low-side switching transistor and generates a voltage output responsive thereto.... Agent: Howison & Arnott, L.l.p

20090206786 - Method of controlling a reversible electric machine: A method of preparing a reversible electric machine with a phase for starting a heat engine of a vehicle that is equipped with an automatic start/stop system, whereby said machine comprises a rotor which is connected to the heat engine. The method comprises the following steps consisting in detecting an... Agent: Matthew R. Jenkins, Esq.

20090206787 - Drive control system and machine control device: A drive control system includes a drive control device, an auxiliary control device, and a physical-amount detecting device. The physical-amount detecting device detects a physical amount such as position information necessary for the machine control device to operate. The drive control device, the auxiliary control device, and the physical-amount detecting... Agent: Sughrue Mion, PLLC

20090206789 - Device and method of driving stepping motor of analog electronic clock: A stepping motor driving apparatus of an analog electronic clock, in which, when the rotation of a rotor is not detected after a pulse is supplied to a coil of a stepping motor, a first switching control section switches the pulse supplied to the coil to a pulse having a... Agent: Frishauf, Holtz, Goodman & Chick, PC

20090206788 - Motor driver supplying drive current while adjusting decay rate thereof: A motor driver that supplies a drive current to a stepping motor includes a decay rate controller configured to mix a first decay rate and a second decay rate smaller than the first decay rate with each other, and set a plurality of mix decay rates, a control logic circuit... Agent: Fish & Richardson P.C.

20090200968 - Drive apparatus and method for its operation: A drive apparatus with at least one synchronous motor, a converter and a mechanical energy buffer able to be fed from an energy supply network, which, for converting mechanical energy into electrical current, includes a first asynchronous machine, and a method of operation for such a drive apparatus are specified,... Agent: Siemens Corporation Intellectual Property Department

20090200969 - Regenerative braking apparatus: In a regenerative braking apparatus that is connected to a power supply apparatus that supplies electric power to a load, and consumes regenerative power regenerated from a load side together with other regenerative braking apparatuses that are connected to the power supply apparatus, an operation-level changing unit calculates, as occasion... Agent: Sughrue Mion, PLLC

20090200971 - Drive system of synchronous motor: A drive system of a permanent magnet motor is constituted of a mode switching trigger generator which monitors a state of a permanent magnet motor and issues a mode switching trigger, a conduction mode determining unit which receives the mode switching trigger and switches the mode of the permanent magnet... Agent: Mattingly & Malur, P.C.

20090200972 - Brushless dc motor and image pickup apparatus: A brushless DC motor configured to drive a driven member includes a rotor having a magnet, a stator having a coil configured to provide a rotational force to the magnet, a position detector configured to output a first signal that is periodic, in accordance with a rotating position of the... Agent: Cowan Liebowitz & Latman P.C. John J Torrente

20090200973 - Motor drive circuit: A motor-drive circuit comprising: a current-passage-control circuit to perform ON/OFF control of a drive transistor connected to a motor coil to pass current through the motor coil; an overcurrent-state-detection circuit to detect whether current passing through the drive transistor is in an overcurrent state where the current exceeds a predetermined... Agent: SocalIPLaw Group LLP

20090200970 - Chopper control system for rotary machines: A control apparatus is to drive a power converter. The power converter has a power supply unit, a switching member electrically connected to the power supply unit, and a power accumulator electrically connected to the switching member. The control apparatus controls a rotary machine with a terminal electrically connected to... Agent: Nixon & Vanderhye, PC

20090200974 - Sensorless control apparatus of synchronous machine: A sensorless control apparatus of a rotary machine includes an inverter 05 to invert DC power and AC power from one to another, a permanent-magnet synchronous machine 07 whose rotor has magnetic saliency and which receives power from the inverter and is driven thereby, a PWM modulate means 04 to... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090200975 - Motor drive apparatus and method for electric power steering system: In a motor drive apparatus for an EPS motor, which provides steering assist torque in an electric power steering system, a three-phase inverter applies three phase-voltages to the EPS motor, and a controller controls the three-phase inverter. The controller drives the EPS motor by implementing a two-phase modulation method and... Agent: Nixon & Vanderhye, PC

20090200976 - Parking brake control device: In a parking brake control device, the minimum value of a motor current is set as an idle current after a motor begins to be driven, specifically, in a period during which the idle current is being sampled. As a result, the idle current is set to a value which... Agent: Buchanan, Ingersoll & Rooney PC

20090200977 - Wall saver: A system and associated method for preventing damage to an adjacent wall surface of an electrically operated bed that utilizes a normally closed/momentarily open switch assembly attached to the bed frame at a location such that when the bed fame is maneuvered toward an adjacent wall surface, a head of... Agent: Dennis G. Lapointe Lapointe Law Group, Pl

20090200978 - Robot controller having component protecting function and robot control method: A robot controller and a robot control method, by which each element constituting a robot is protected. An output of a rotary encoder attached to a servomotor is read, and the motor speed is obtained by calculating the difference between a current speed and another speed in a previous speed... Agent: Drinker Biddle & Reath (dc)

20090200979 - Method for compensating for angular transmission error of an actuator: The non-linear elastic deformation component included in the angular transmission error of an actuator provided with a wave gear drive is a component of the angular transmission error occurring due to elastic deformation of a flexible externally-toothed gear when the direction of rotation of the motor shaft changes. This component... Agent: Buchanan, Ingersoll & Rooney PC

20090200980 - System and method for controlling four-quadrant operation of a switched reluctance motor drive through a single controllable switch: A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter.... Agent: Dickinson Wright PLLC James E. Ledbetter, Esq.

20090200981 - System and method for providing constant loading in ac power applications: A system and method for providing constant loading in AC power applications wherein at least one turn-on point (7) of at least one half cycle of a modulating sine wave (2) is determined; at least one turn-off point (8) of said at least one half cycle of a modulating sine... Agent: Edward M. Livingston, Pa

20090200968 - Drive apparatus and method for its operation: A drive apparatus with at least one synchronous motor, a converter and a mechanical energy buffer able to be fed from an energy supply network, which, for converting mechanical energy into electrical current, includes a first asynchronous machine, and a method of operation for such a drive apparatus are specified,... Agent: Siemens Corporation Intellectual Property Department

20090200969 - Regenerative braking apparatus: In a regenerative braking apparatus that is connected to a power supply apparatus that supplies electric power to a load, and consumes regenerative power regenerated from a load side together with other regenerative braking apparatuses that are connected to the power supply apparatus, an operation-level changing unit calculates, as occasion... Agent: Sughrue Mion, PLLC

20090200971 - Drive system of synchronous motor: A drive system of a permanent magnet motor is constituted of a mode switching trigger generator which monitors a state of a permanent magnet motor and issues a mode switching trigger, a conduction mode determining unit which receives the mode switching trigger and switches the mode of the permanent magnet... Agent: Mattingly & Malur, P.C.

20090200972 - Brushless dc motor and image pickup apparatus: A brushless DC motor configured to drive a driven member includes a rotor having a magnet, a stator having a coil configured to provide a rotational force to the magnet, a position detector configured to output a first signal that is periodic, in accordance with a rotating position of the... Agent: Cowan Liebowitz & Latman P.C. John J Torrente

20090200973 - Motor drive circuit: A motor-drive circuit comprising: a current-passage-control circuit to perform ON/OFF control of a drive transistor connected to a motor coil to pass current through the motor coil; an overcurrent-state-detection circuit to detect whether current passing through the drive transistor is in an overcurrent state where the current exceeds a predetermined... Agent: SocalIPLaw Group LLP

20090200970 - Chopper control system for rotary machines: A control apparatus is to drive a power converter. The power converter has a power supply unit, a switching member electrically connected to the power supply unit, and a power accumulator electrically connected to the switching member. The control apparatus controls a rotary machine with a terminal electrically connected to... Agent: Nixon & Vanderhye, PC

20090200974 - Sensorless control apparatus of synchronous machine: A sensorless control apparatus of a rotary machine includes an inverter 05 to invert DC power and AC power from one to another, a permanent-magnet synchronous machine 07 whose rotor has magnetic saliency and which receives power from the inverter and is driven thereby, a PWM modulate means 04 to... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090200975 - Motor drive apparatus and method for electric power steering system: In a motor drive apparatus for an EPS motor, which provides steering assist torque in an electric power steering system, a three-phase inverter applies three phase-voltages to the EPS motor, and a controller controls the three-phase inverter. The controller drives the EPS motor by implementing a two-phase modulation method and... Agent: Nixon & Vanderhye, PC

20090200976 - Parking brake control device: In a parking brake control device, the minimum value of a motor current is set as an idle current after a motor begins to be driven, specifically, in a period during which the idle current is being sampled. As a result, the idle current is set to a value which... Agent: Buchanan, Ingersoll & Rooney PC

20090200977 - Wall saver: A system and associated method for preventing damage to an adjacent wall surface of an electrically operated bed that utilizes a normally closed/momentarily open switch assembly attached to the bed frame at a location such that when the bed fame is maneuvered toward an adjacent wall surface, a head of... Agent: Dennis G. Lapointe Lapointe Law Group, Pl

20090200978 - Robot controller having component protecting function and robot control method: A robot controller and a robot control method, by which each element constituting a robot is protected. An output of a rotary encoder attached to a servomotor is read, and the motor speed is obtained by calculating the difference between a current speed and another speed in a previous speed... Agent: Drinker Biddle & Reath (dc)

20090200979 - Method for compensating for angular transmission error of an actuator: The non-linear elastic deformation component included in the angular transmission error of an actuator provided with a wave gear drive is a component of the angular transmission error occurring due to elastic deformation of a flexible externally-toothed gear when the direction of rotation of the motor shaft changes. This component... Agent: Buchanan, Ingersoll & Rooney PC

20090200980 - System and method for controlling four-quadrant operation of a switched reluctance motor drive through a single controllable switch: A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter.... Agent: Dickinson Wright PLLC James E. Ledbetter, Esq.

20090200981 - System and method for providing constant loading in ac power applications: A system and method for providing constant loading in AC power applications wherein at least one turn-on point (7) of at least one half cycle of a modulating sine wave (2) is determined; at least one turn-off point (8) of said at least one half cycle of a modulating sine... Agent: Edward M. Livingston, Pa

20090195195 - Position feedback device for a linear motor: A position feedback device for a linear motor comprises three linearly-arranged Hall sensors. The three Hall sensors are connected to a mover, respectively. The direction in which the Hall sensor in the middle of the three Hall sensors is reverse to the direction in which the other two Hall sensors... Agent: Dr. Banger Shia

20090195196 - Control devices and methods: A control device for driving a motor which includes a rotor and a stator is provided. The control device includes a Hall detector and driving circuit. The Hall detector detects magnetic flux variation when the rotor rotates and generates a first detection signal and a second detection signal. The first... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090195197 - Rotating electrical machine control device: A rotating electrical machine control device includes an inverter; a resolver; a unit; a three-phase/two-phase modulation switching unit; and a motor control unit that switches to a two-phase modulation in a specific region where an electric noise given to the resolver by a rotating electrical machine is large, even in... Agent: Oliff & Berridge, PLC

20090195198 - Motor and method for starting the same: The method for initially starting the motor improves the reliability to the start of the motor. In particular, even though the external load is at more than a predetermined level, a rotor located at an arbitrary angle can be aligned to an accurate initial position. Moreover, it can prevent the... Agent: Birch Stewart Kolasch & Birch

20090195199 - Motor drive device: A controller (30) determines a failure of an inverter (14) in response to detection of an excessive current in any one of IGBT elements of the inverter (14) during driving of a motor generator (MG1). The controller (30) sets the inverter (14) to a suspended state in response to the... Agent: Oliff & Berridge, PLC

20090195200 - Electric motor drive system and electric motor control method: An electric motor drive system having current detecting sections for detecting the currents flowing into electric motors, speed variation calculating sections for calculating the speed variation estimating values for the electric motors in accordance with the motor currents detected by the current detecting sections and the current command values for... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090195201 - Method for controlling an ac electronic motor and device for carrying out said method: The invention relates to electric engineering, in particular to methods for controlling an ac electronic motor. The inventive control method consists in starting and rotating a rotor upon EMF signals in current-free sections of an armature winding, in converting the EMF signals into discrete logical level signals by a normaliser,... Agent: Patterson & Sheridan, L.L.P.

20090195202 - Electric motor, method for correcting sensor output for the same, and control circuit: The electric motor includes a coil array having a plurality of magnetic coils; a magnet array having a plurality of permanent magnets; a magnetic sensor outputting an output signal that changes in analog fashion depending on relative location of the magnet array and the coil array; a drive control circuit;... Agent: Harness, Dickey & Pierce, P.L.C

20090195203 - Virtual tensioner travel sensor for a serpentine belt tensioner assembly: A control module of a vehicle comprises a drive diagnostic module and a hybrid control module. The drive diagnostic module determines a load energy of an accessory drive system of the vehicle and determines a slip percentage of a belt of the accessory drive system based on an engine speed... Agent: Harness Dickey & Pierce, P.L.C

20090195204 - Power tool having motor speed monitor: A hammer drill comprising a body (2) containing an electric motor (4) for driving an output (6) of the drill is disclosed. A vibration transducer (12) senses vibrations generated by the motor and produces a vibration signal dependent upon the sensed vibrations. An electronic module (10) includes a controller (10a)... Agent: The Black & Decker Corporation

20090195205 - Motor control system including electrical insulation deterioration detecting system: A motor control system of the present invention includes an accurate electrical insulation deterioration detecting system. A voltage divider circuit is arranged between a negative DC output portion and a ground, through a normally open switch circuit. A detecting operation control section closes the normally open switch while a circuit... Agent: Rankin, Hill & Clark LLP

20090195206 - Servo motor control system: A table containing correspondence between “n” and “m” is set in a control circuit of a servo control system so that the current command data in the m-th (m=1, 2, 3 . . . ) current command register is assigned to the n-th (n=1, 2, 3 . . . )... Agent: Drinker Biddle & Reath (dc)

20090195207 - Servo control circuit: The present invention discloses a servo control circuit comprising: a first node for receiving a control voltage; a second node for receiving a feedback voltage; an operational amplifier controlling a current on a path according to the voltages at the first and second nodes, the path including an internal voltage... Agent: Tung & Associates / Randy W. Tung, Esq.

20090195208 - Aperture closure member control arrangements: An aperture closure member control arrangement includes a disc which rotates as the aperture closure member moves. The disc has a ring of teeth. A sensor, such as a Hall effect sensor and permanent magnet, detect the passage of teeth as a cyclic waveform of amplitude and frequency determined by... Agent: Smith-hill And Bedell, P.C.