|Electricity: motive power systems patents - Monitor Patents|
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Electricity: motive power systemsBelow are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application. 08/28/2014 > 23 patent applications in 21 patent subcategories.
20140239854 - Drive control device: P
20140239855 - Thrust ripple mapping system in a precision stage and method thereof: The present invention proposes a thrust ripple mapping system in a precision stage with the thrust ripple mapping system comprising a moving stage, a load cell, a plurality of motors and a processing component. The load cell is coupled to the moving stage. The motors are employed in moving the... Agent: National Taiwan University
20140239856 - Electrical energy storage system for traction power supply: An energy storage system for connection to a traction power supply that provides power to an electric vehicle. The energy storage system includes a power controller that controls a DC-DC converter to transfer electrical energy from the traction power supply to electrical energy storage when the train is braking. The... Agent: Abb Inc.
20140239857 - Control apparatus for a switched reluctance motor: An apparatus for controlling a switched reluctance motor with use of a power conversion circuit. In the apparatus, a command voltage setter sets a command voltage for a coil of the motor, where the command voltage is set to change gradually during either or both of a ramp-up period and... Agent: Denso Corporation
20140239858 - Movement control system for a drilling plant: A movement control system for a drilling plant includes a first hydraulic circuit with an inlet duct and an outlet duct for a working fluid, a pumping device of reversible type promoting the circulation of the fluid, first electric machine mechanically coupled to the pumping device to promote circulation of... Agent: Reel S.r.l.
20140239859 - Motor drive for on-load tap changer: The invention relates to a motor drive for an on-load tap changer with an electrical DC motor and a braking device for denned braking of this motor. According to the invention, the braking device has a first diode (D1), which, depending on the direction of rotation, is connected in series... Agent:
20140239860 - Electric motor feedforward control utilizing dynamic motor model: A motor control system comprising a motor configured to operate at a rotational velocity and a control module in communication with the motor is provided. The control module is configured to receive a torque command indicating a desired amount of torque to be generated by the motor, obtain a rotational... Agent: Steering SolutionsIPHolding Corporation
20140239861 - Inverter apparatus: An objective of the present invention is to improve current detection accuracy and to reduce noise of carrier frequency. A motor apparatus and a motor drive apparatus calculate motor currents Iu, Iv, and Iw using a DC bus current detected value Idc of an inverter and control a magnitude and... Agent: Hitachi Automotive Systems, Ltd.
20140239862 - Control of a brushless electrical machine: A brushless electrical machine has at least one phase winding which produces torque to drive a load. The control system for the machine is able to vary the flux and current supplied to a phase so as to vary the torque output as a function of the rotor position. The... Agent: Nidec Sr Drives Ltd.
20140239863 - Position estimation system and method for an electric motor: Systems and methods of estimating a motor position of a motor are disclosed. One exemplary system and method involve observing motor currents of the motor at two different times. Average motor voltages of the motor are determined between the two different times. Average back electro motive force (BEMF) values of... Agent: Cirrus Logic, Inc.
20140239864 - Variable link sensorless brushless direct current motor controller for space and hardened applications: A sensorless motor controller includes a variable link control, including a radiation-hardened field programmable gate array (FPGA) and a back electromotive force (EMF) decoder circuit. The back EMF decoder infers the position of a rotor of the motor. A filter on the decoder conditions the back EMF signal and has... Agent: Hamilton Sundstrand Corporation
20140239865 - Brushless motor device controlled by a carrier of dc positive and negative power wires: A brushless motor device controlled by a carrier of DC positive and negative power wires comprises a controller. The controller outputs a positive DC wire for outputting a positive DC voltage and a negative DC wire for outputting a negative DC voltage. The positive and negative DC voltages include a... Agent:
20140239866 - Motor driving device: A motor driving device, which controls a rotation number of a brushed motor by outputting a command signal to a motor controller placed in a current supply path, includes: a noise detecting unit including at least one of: a high voltage side noise detecting unit which detects high voltage side... Agent: Advics Co., Ltd.
20140239867 - Pinch detection apparatus for opening-and-closing member, and opening-and-closing member apparatus: A pinch detection apparatus for an opening-and-closing member actuated by a motor, the pinch detection apparatus includes a reference data storage portion calculating load data on the basis of a rotation speed of the motor and an environmental temperature, the reference data storage portion storing the load data and the... Agent: Aisin Seiki Kabushiki Kaisha
20140239868 - Method to command and control the electric motor of an automation unit and connected system: Method to command and control an electric motor of an automation unit. The unit comprises a mechanical member, driven by a drive shaft, a central command and control unit, and a position detection mean. The method provides that the central command and control unit receives the position signals of the... Agent: Gima Tt S.r.l.
20140239869 - Electrical system: An electrical system is provided. The electrical system includes a first 2-pole direct current source and/or sink, a second 2-pole direct current source and/or sink, a first 3-phase direct current/alternating current converter, a second 3-phase direct current/alternating current converter, and an electrical machine. The electrical machine is designed with 6... Agent: Bayerische Motoren Werke Aktiengesellschaft
20140239870 - Power conversion apparatus: A power conversion apparatus includes a power conversion element; a capacitor; a control circuit that outputs a control signal to control operation of the power conversion element at the time of driving a load; a discharge control unit that outputs a discharge control signal to control operation of the power... Agent: Hitachi Automotive Systems, Ltd.
20140239871 - Boat anchor winch: The invention provides a winch and method for raising and lowering a boat anchor attached to an anchor rope, comprising: an electric motor (10) operable to turn the winch in a rope raising direction or a rope lowering direction and powered from a power source supplying a supply voltage; and... Agent: Savwinch Pty Lt
20140239874 - Motor driving circuit, electronic device using the same, and driving method thereof: A motor driving circuit for driving a step motor includes a logical circuit synchronized with a step pulse signal to control a bridge circuit connected to a coil of the step motor and control electric power supplied to the coil of the step motor, a counter electromotive force detecting unit... Agent: Rohm Co., Ltd.
20140239872 - Pulsed-motor driving apparatus and pulsed-motor driving method: The inventive apparatus includes a driving clock generating section generating a driving clock having a driving frequency and driving a pulsed motor based on an inputted base clock having a base frequency; wherein in a predetermined period. The driving clock generating section operates in a through-output mode in which the... Agent: Nk Works Co., Ltd.
20140239873 - Pulsed-motor driving apparatus and pulsed-motor driving method: A frequency-divided clock generating section 4 generates a frequency-divided clock having a predetermined driving frequency by dividing a base clock having a base frequency based on a set frequency-division ratio. A division-ratio calculating section 2 calculates a real number ratio of the driving frequency relative to the base frequency and... Agent: Nk Works Co., Ltd.
20140239875 - Coupling with concentric contact around motor shaft for line start synchronous motor: A method comprises providing a line-start synchronous motor. The motor has a stator, a rotor core disposed within the stator, and a motor shaft. In accordance with a step of the method, a coupling for coupling a load to the motor is provided. The coupling has a motor shaft attachment... Agent:
20140239876 - Electric drive with reconfigurable winding: An electric drive system for a PM electric machine, where the machine includes a stator, a rotor and an inverter. Each phase of the machine includes a stator winding separated into a first winding section and a second winding section and two switches in the inverter electrically coupled to the... Agent: Gm Global Technology Operations LLC08/21/2014 > 19 patent applications in 12 patent subcategories.
20140232300 - Vibration member driving circuit: A vibration member driving circuit causes vibrations in a vibration member at least including an electro-mechanical energy conversion element and an elastic body by applying alternating voltage to the electro-mechanical energy conversion element fixed to the elastic body. The vibration member driving circuit includes an inductor and capacitor serially connected... Agent: Canon Kabushiki Kaisha
20140232302 - Battery processing apparatus, vehicle, battery processing method, and battery processing program: A battery processing apparatus includes a chargeable and dischargable battery storing electric power to be supplied to a motor for driving a wheel, and a controller performing discharge allowing processing of switching from a second state in which discharge from the battery to a load is not allowed to a... Agent: Toyota Jidosha Kabushiki Kaisha
20140232301 - Method and device for charging a battery of an electrical drive using components of the electrical drive: The invention relates to a multi-stage charging device for a battery of a battery operated electrical motor. The multistage charging device comprises a buck converter, an intermediate circuit and a boost converter in order to generate a suitable direct charging current from a (one or three-phase) alternating current provided by... Agent: Robert Bosch Gmbh
20140232303 - Drive unit and method for operating the drive unit: A drive unit for operating a device, in particular a device in a vehicle and a method for operating a drive unit are provided. An electrical drive assembly and a break assembly are combined and arranged together in a common housing. The breaking assembly could be a mechanical breaking assembly... Agent: Brose Fahrzeugteile Gmbh & Co. Kg, Wurzburg
20140232308 - Inverter apparatus: An object of the present invention is to achieve stable inverter control by means of current detection using one current sensor in all of periods in which overmodulation control is performed. An inverter controller includes a γ-axis current calculation section that holds, in advance, a γ-axis current arithmetic expression including... Agent: Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.
20140232306 - Magnet flux amount estimation device, abnormal demagnetize determination device, synchronous motor driving device, and electric motor car: According to one embodiment, a magnet flux amount estimation device includes a magnetic pole position detector configured to detect a magnetic pole position of a permanent magnet synchronous motor including a permanent magnet within a rotor; an inductance-equivalent value determination module configured to determine an inductance-equivalent value of a d-axis... Agent: Kabushiki Kaisha Toshiba
20140232309 - Power converter: In a power converter, vibration and noise of a motor due to pulsation of a direct current link voltage are reduced. An inverter circuit is provided, which is configured to convert a direct current link voltage having a pulsating component to an alternating current to output the alternating current to... Agent: Daikin Industries, Ltd.
20140232304 - Rotary electrical machine control device: Regenerated power fed from a rotary electric machine is immediately reduced where connection between an electric machine and a DC power source is blocked. An inverter control section controls the inverter by controlling an armature current in a two-axis orthogonal coordinate system that rotates in synchronization with the rotary electric... Agent: Aisin Aw Co., Ltd.
20140232307 - Vector control device for electric motor, electric motor, vehicle drive system, and vector control method for electric motor: A vector control device includes a vector control unit computing an output voltage output from the electric power converter according to vector control based on torque command and flux command and generating a PWM signal for controlling the electric power converter based on the output voltage, a first flux-command generation... Agent: Mitsubishi Electric Corporation
20140232310 - System and method for controlling a sinusoidal-drive brushless dc electric motor for an automotive power actuator: A control system (14) for controlling a brushless electric motor (1) for an automotive power actuator (10), having a rotor (3) operable to rotate with respect to stator windings (2a, 2b, 2c), the control system (14) is provided with: a position sensing unit (4a-4c, 30) coupled to the rotor (3),... Agent: Magna Closures S.p.a.
20140232305 - Method for controlling a multiphase machine: A method is described for controlling a multiphase machine which is connected to a battery, the multiphase machine having a DC link which is provided with a DC link capacitor, phase windings, and a high side switch and a low side switch for each phase. The switches associated with the... Agent: Robert Bosch Gmbh
20140232311 - Method and system for determining the position of a synchronous motor's rotor: To establish an initial/resting position of a permanent magnet rotor, all motor stator windings are stimulated (voltage applied thereto) in sequence, the time it takes for current in the stimulated stator winding to rise to a specific current value is measured for each stator winding and these time measurement results... Agent:
20140232312 - Method for starting a washing machine electric motor: The present invention relates to a method for starting a washing machine electric motor and, more particularly, an adaptive method for starting a washing machine electric motor, which is especially able to control the firing angle (preferably during the centrifugation cycles) of the voltage cycles depending on the electrical supply... Agent: Whirlpool S.a.
20140232314 - Control device for rotary machine and inductance measurement method for rotary machine: A control device for rotary machine includes: a voltage instruction generation section for generating a voltage instruction; a voltage application section for applying voltage to a rotary machine based on the voltage instruction; a current detection section for detecting rotary machine current of the rotary machine; and an inductance calculation... Agent: Mitsubishi Electric Corporation
20140232313 - Reduced size power inverter suitable for a vehicle: A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringes fixed to the inner... Agent: Hitachi, Ltd.
20140232316 - Control module for a motorized surgical tool, the module including a trigger sensor, a motor rotor sensor and a control circuit that are sealed from the ambient environment: A control module for a motorized powered surgical tool. The module includes a trigger sensor, a motor rotor position sensor and control circuit. The trigger sensor and motor rotor position sensor output their signals by monitoring magnetic fields associated with, respectively the trigger and the motor rotor. Based on signals... Agent: Stryker Corporation
20140232315 - Method and system for controlling input voltage in electric charges: A method and a system for controlling input voltage (1) for electric charges (5) that have a selective organization of electric components for more than one input voltage (1), preferably for induction motors used on cooling compressors, by means of a set of output switches (4). The detection may be... Agent: Whirlpool S.a.
20140232317 - System and method for controlling a synchronous motor: A synchronous electrical motor includes a rotor with a DC field winding. An exciter is configured to energize the DC field winding by generating a DC current in a first direction across the DC field winding when activated. A control system is configured to control a current flow across the... Agent:
20140232318 - Power conversion control device, power conversion control method, electric motor, and vehicle driving system: A power conversion control device includes a modulation-wave generating unit generating a modulation wave based on output voltage phase angle command and modulation factor, a carrier-wave generating unit that, in a case of non-overmodulation state, generates a triangular wave or saw-tooth wave as the carrier wave, and, in a case... Agent: Mitsubishi Electric Corporation08/14/2014 > 20 patent applications in 15 patent subcategories.
20140225535 - Rotating electrical machine drive system: In a system for driving a three-phase rotating electrical machine of drive sources for applying separate drive forces to a rotary shaft, a phase of the rotating electrical machine, a current of which is detected by a current sensor and capable of being used for control of the rotating electrical... Agent: Denso Corporation
20140225536 - Motor control system: A motor control system includes: a converter; two inverters; two alternating-current motors; and a control unit. The control unit is configured to control the system voltage by feedback of a current phase of a current vector of motor current of each of the motors on a d-q coordinate plane so... Agent: Toyota Jidosha Kabushiki Kaisha
20140225537 - Control apparatus for ac motor: A control apparatus includes an inverter for driving a three-phase AC motor when connected to a DC power source, a smoothing capacitor interposed between the DC power source and an input side of the inverter and connected in parallel to the DC power source, a current sensor for detecting a... Agent: Denso Corporation
20140225538 - Control device of ac motor: A control device of a three phase AC motor includes: an inverter for driving the motor; a current sensor for sensing current flowing in a sensor phase of the motor; and a controller for switching multiple switching elements in the inverter to control the current of the motor. An electric... Agent: Denso Corporation
20140225539 - Control device of ac motor: A control device of a three phase AC motor includes: an inverter for driving the motor; a current sensor for sensing current in a sensor phase of the motor; and a controller for switching multiple switching elements in the inverter to control the current of the motor. The controller includes:... Agent: Denso Corporation
20140225540 - Control apparatus for ac motor: In a motor control apparatus for controlling an AC motor with an inverter, a current estimation value is calculated based on a current detection value of one phase of the motor and a rotation angle of the motor. A first voltage command is calculated based on the current estimation value... Agent: Denso Corporation
20140225541 - Control device of ac motor: A control device for controlling a three phase AC motor with an inverter includes: a current acquisition device for a current of the motor; a rotation angle acquisition device for a rotation angle of the motor; a current estimation device for a current estimated value; a first voltage command value... Agent: Denso Corporation
20140225542 - Control device of ac motor: A control device for controlling a three phase AC motor with an inverter includes: a sensor phase current acquisition device for a sensor phase current sensed value; a rotation angle acquisition device for a rotation angle sensed value; a number-of-revolutions operation device for the revolution number; a current estimation device... Agent: Denso Corporation
20140225543 - Motor control device: A motor control device includes a PWM signal generation unit configured to increase/decrease duty to both leading and lagging sides regarding a phase in which the duty becomes maximum among three-phase PWM signals. The unit is also configured to increase/decrease the duty to one of leading and lagging sides regarding... Agent: Kabushiki Kaisha Toshiba
20140225544 - Apparatus with active software clamping of supply voltage: A power tool that includes a motor configured to drive a working element, a power supply that is coupled to the motor to provide power to the motor, a shunt circuit that is coupled to the power supply and the motor, and a controller. The shunt circuit includes a shunt... Agent: Milwaukee Electric Tool Corporation
20140225546 - Motor drive method and motor drive device: A motor drive method of the invention is to drive a brushless motor having a rotor, a stator, and a hall element used as a position detecting sensor. While driving the brushless motor, when executing a correction process for a rotation speed of the rotor, the correction process is skipped... Agent:
20140225545 - Systems and methods for controlling electric machines: A motor controller is provided that includes an inverter configured to drive an electric motor, a rectifier configured to rectify an alternating current (AC) input current and to output the rectified AC input current to the inverter, and a controller coupled to the inverter. The controller is configured to improve... Agent: Regal Beloit America, Inc.
20140225547 - Control device and control method for electric motor, and motor and vehicle driving system to which the control device and control method are applied: There is provided a control device for an electric motor that controls the operation of the electric motor by outputting PWM signals to switching elements included in an inverter. The control device for the electric motor includes a voltage-command generating unit configured to generate, as voltage commands Vu*, Vv*, and... Agent: Mitsubishi Electric Corporation
20140225548 - Methods of determining initial position of a rotor and systems thereof: At least one example embodiment discloses a drive system including a motor including a rotor, the motor configured to receive a measured current, a controller configured to generate a voltage for the motor at a stationary reference frame, the voltage having a frequency and the measured current being based on... Agent: Deere & Company
20140225549 - Method and apparatus for limiting a power consumption of an electric motor in the event of overload in a handheld power tool: A method for limiting a power consumption in the event of overload of an electrical drive, in particular an electric motor of a handheld power tool, by outputting power to the electrical drive and controlling the voltage of the electric motor using at least one circuit breaker. At least the... Agent: Robert Bosch Gmbh
20140225550 - Wheel assembly defining a motor/generator: The present document describes a wheel assembly defining a motor/generator. The wheel assembly comprises a plurality of stator units coaxially provided within a rotor. The stator units comprise a plurality of spokes co-centrically provided around a hub/shaft and a coil provided around at least a portion of the spokes for... Agent:
20140225551 - Control apparatus for ac motor: In a motor control apparatus for controlling an AC motor with an inverter, a current estimation value is calculated based on a current detection value of one phase of the motor and a rotation angle of the motor. A difference between a current command value related to driving of the... Agent: Denso Corporation
20140225552 - Direct-current power supply device and electric motor driving device: A direct-current power supply device includes a reactor, one end of which is connected to one output end of an alternating-current power supply, a switching unit for short-circuiting the other end of the reactor and the other output end of the alternating-current power supply, a rectifying unit configured to rectify... Agent: Mitsubishi Electric Corporation
20140225553 - Converter control device and air conditioner including converter control device: A converter control device comprises: a voltage-zero-cross detection unit detecting zero cross of the alternate-current voltage and outputting a voltage zero-cross signal; a power-source-current detection unit detecting a power source current of the alternate-current power source; a bus-line-voltage detection unit detecting a bus-line voltage between terminals of the smoothing capacitor;... Agent: Mitsubishi Electric Corporation
20140225554 - Method for controlling a controlled switch operating the power supply of an electric motor: A method for controlling a controlled switch operates a power supply of an electric motor from an AC voltage source. The method includes actuating closure of the controlled switch, an instant of actuation of which is dependent on a value characteristic of a value of an electric voltage across terminals... Agent: Schneider Electric Industries Sas08/07/2014 > 24 patent applications in 14 patent subcategories.
20140217931 - Drive circuit and physical quantity measuring device: In order for keeping the amplitude of the excitation current of a vibrator constant irrespective not only of the temperature variation but also of the manufacturing variation and the variation in frequency, a comparison control circuit for controlling the amplitude of the drive signal for exciting the vibrator includes a... Agent: Seiko Epson Corporation
20140217929 - Stiction resistant mems device and method of operation: A MEMS device (20) includes a movable element (20) suspended above a substrate (22) by a spring member (34) having a spring constant (104). A spring softening voltage (58) is applied to electrodes (24, 26) facing the movable element (20) during a powered mode (100) to decrease the stiffness of... Agent:
20140217930 - System and method for efficient drive of capacitive actuators with voltage amplification: A circuit for driving a plurality of capacitive actuators, the circuit having a low-voltage side, a high voltage side and a flyback transformer between the two. The low-voltage side comprises first and second pairs of low-side switches connected in series across an input voltage. The flyback transformer has a primary... Agent:
20140217932 - Magnetostrictive actuator: A method of minimizing the cold start delay and impact fatigue of an actuator includes calibrating the actuator by initially raising the temperature to a desired operating temperature through induction heating of the actuator rod. Additionally, a control system for a magnetostrictive actuator includes a rod of magnetostrictive material, a... Agent: Great Plains Diesel Technologies, L.c.
20140217933 - Method and system for controlling motor: A method for controlling a motor to enable drive assist of an engine with a high torque in a low rotation speed range as well as synchronized driving in a high rotation speed range. The method includes controlling a motor connected to a low voltage battery. The motor has a... Agent: Samsung Sdi Co., Ltd.
20140217935 - Motor control device: A motor control device according to the invention includes: a mode setting section that sets one of a first mode in which a charge/discharge current of a secondary battery varies according to load fluctuation of a motor and a second mode in which the charge/discharge current of the secondary battery... Agent: Hitachi Automotive Systems, Ltd.
20140217934 - Motor-driven appliance and battery pack: A motor-driven appliance includes a battery; a motor including permanent magnets as field magnets; a momentary maximum current upper limit storage unit in which a predetermined momentary maximum current upper limit is stored; a current detection unit that detects a current flowing in the motor; a current threshold setting unit... Agent: Makita Corporation
20140217936 - Drive device and drive method for brushless motor: The invention relates to a drive device and a drive method for a brushless motor. In a drive method in which a switching timing of energization patterns is detected by comparing a pulse induced voltage of a non-energized phase with a voltage threshold, when the pulse induced voltage does not... Agent: Hitachi Automotive Systems, Ltd.
20140217937 - Single-phase brushless motor driver and method: A driving circuit for a single-phase-brushless motor and a method that includes a driving-signal-generating circuit configured to generate a driving signal for supplying, to a driving coil of the single-phase brushless motor, an output circuit coupled to the driving signal generating circuit; and an induced voltage zero-cross detecting circuit having... Agent: Semiconductor Components Industries, LLC
20140217938 - Motor controller with drive-signal conditioning: An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is operable to generate a motor-coil drive signal having a first component at a first frequency, and the signal conditioner is coupled to the motor driver and is operable to alter the first... Agent: Stmicroelectronics S.r.l.
20140217939 - Apparatus and method of decreasing speed of sensorless brush less direct current (bldc) motor: Disclosed herein is an apparatus of a sensorless brush less direct current (BLDC) motor capable of rapidly driving the BLDC motor at a decreased speed. The apparatus includes: a switching unit configured to switch a direct current (DC) power depending on a plurality of pulse width modulation (PWM) signals to... Agent:
20140217940 - Electrically operated power steering device: An electric power steering apparatus includes an EPS actuator that applies assist force to a steering system, and an ECU that controls operation of the EPS actuator. The ECU includes an inverter device, a gate driver circuit, a gate driver power source, a microcomputer, and the like. The microcomputer switches... Agent: Jtekt Corporation
20140217941 - Motor control system: A motor control system includes: a power supply; a converter; an inverter; an alternating-current motor; and a control unit that drives the motor in any one of sinusoidal PWM control, overmodulation control and rectangular wave control through operation control of the converter and the inverter. The control unit starts step-up... Agent: Toyota Jidosha Kabushiki Kaisha
20140217942 - Driving system for driving switching element: In a driving system, an applying module apples, in response to an input of an on or off command as a switching command, a switch signal to a target switching element as a high- or low-side switching element to switch the target switching element to be an on or off... Agent: Denso Corporation
20140217943 - Determining a position of a motor using an on-chip component: An embodiment of a motor controller includes first and second supply nodes, a motor-coil node, an isolator, a motor driver, and a motor position signal generator. The isolator is coupled between the first and second supply nodes, and the motor driver is coupled to the second supply node and to... Agent: Stmicroelectronics S.r.i.
20140217944 - Permanent magnet motor with sinusoidal back-emf waveform and related motor controller for position sensorless drives: A system includes a permanent magnet motor having a rotor and a stator. The rotor and the stator have a configuration that causes the motor to generate a back-electromagnetic force (EMF) waveform that is substantially sinusoidal. The system also includes a motor controller having a sliding-mode observer configured to identify... Agent: Texas Instruments Incorporated
20140217945 - Control techniques for motor driven systems utilizing back-emf measurement techniques: A method and apparatus for automatic resonance detection is disclosed for a motor-driven mechanical system such as a voice coil motor (VCM) in which a resonance detector and driver are provided. The automatic resonance detector may be implemented on the same integrated circuit as the driver, and dynamically determines the... Agent: Analog Devices Technology
20140217946 - Inverter device and motor drive system: An inverter device includes a power supply unit and a switch controller. The power supply unit supplies AC power to an AC motor whose electric characteristics in response to a rotation speed are switchable between low speed characteristics and high speed characteristics. The switch controller switches the electric characteristics of... Agent: Kabushiki Kaisha Yaskawa Denki
20140217950 - Constant voltage circuit and analog electronic clock: There are provided a constant voltage circuit that outputs a stable constant voltage for an analog electronic clock, and an analog electronic clock featuring low current consumption and prolonged battery life. The constant voltage circuit has a first voltage holding circuit connected between the gate of an output transistor and... Agent: Seiko Instruments Inc.
20140217948 - Method for controlling a multiphase machine: A method for controlling a multiphase machine which is connected to a direct current voltage source. The machine has a DC link which is provided with a DC link capacitor, phase windings, and a high side switch and a low side switch for each phase. The switches associated with the... Agent:
20140217949 - Method of pwm regulation of a continuous current electric motor: A method of PWM regulating a motor through a half-bridge drive stage includes sampling the motor current to obtain sampled values during driving intervals or during current decay intervals, and comparing a last sampled value with a current threshold. The motor is coupled in a slow decay electrical path for... Agent: Stmicroelectronics S.r.i.
20140217947 - Short circuit safe rectifier stage for a subsea power grid: Short circuit safe rectifier stage for a subsea power grid It is described a rectifier stage (251) for converting an input AC voltage to an output voltage, the rectifier stage comprising: a first AC input terminal (255); a second AC input terminal (257), wherein the input AC voltage is applicable... Agent:
20140217951 - Motor control device and motor control method: A motor control device includes a power converter, a velocity controller, and a certain-position stop controller. The power converter outputs a driving current on the basis of an input torque command. The velocity controller generates a calculated torque command on the basis of a difference between a velocity represented by... Agent: Kabushiki Kaisha Yaskawa Denki
20140217952 - Position control apparatus: A position control apparatus is configured to perform full-closed control for controlling the position of a driven member. The position control apparatus includes a vibration period and amplitude detector that detects a vibration period and a vibration amplitude included in a difference value between the position command value and the... Agent: Okuma CorporationPrevious industry: Electric lamp and discharge devices: systems
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