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Electricity: motive power systems December patent applications/inventions, industry category 12/10

20100327786 - Electric motor drive control apparatus: An electric motor drive control apparatus includes a detection angle obtaining section that obtains the detection angle of the resolver; a correction information storage section that stores correction information for correcting the detection angle, in association with a modulation ratio that is a ratio of an effective value of a... Agent: Oliff & Berridge, PLC

20100327787 - Permanent-magnet-type rotating electrical machine: The present invention provides a permanent-magnet-type rotating electrical machine capable of realizing variable-speed operation in a wide range from low speed to high speed at high output and improving, in a wide operating range, efficiency, reliability, and productivity. A narrow magnetic path 11 is formed in a rotor core 2... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100327788 - Method for starting a brushless sensorless dc motor: A method for starting a brushless DC motor. A rotor is aligned with a stator in accordance with a predetermined phase. After alignment, the rotor is positioned in accordance with another phase, two phases are skipped, a timer is set to a first count time, and the rotor is aligned... Agent: Semiconductor Components Industries, LLC Intellectual Property Dept. - A700

20100327789 - Sensorless control of salient-pole machines: A controller (100) for controlling a salient-pole machine (200) is disclosed. The controller (100) is adapted to determine at least one operational parameter of the salient-pole machine (200), such as for example a rotor position, a rotor angle or a steady-state voltage. The controller (100) comprises a calculating unit for... Agent: Bacon & Thomas, PLLC

20100327790 - Control method and motorstarter device: A method for controlling an electric motor with a softstarter. A softstarter device for control of electric motors. Motor torque is controlled in dependence of a torque error signal, based on a calculated difference between the motor torque and a reference torque value, so that the motor torque displays a... Agent: Venable LLP

20100327791 - Electric machine with non-coaxial rotors: A rotary electric machine having plural rotary elements in a non-coaxial arrangement is disclosed. The rotary electric machine includes a housing assembly, at least one stator frame mounted in the housing assembly, at least one stator winding wound on the at least one stator frame, and at least two rotors... Agent: Ziolkowski Patent Solutions Group, Sc (zps)

20100327792 - Circuit for controlling rotation speed of fan of electronic device: A circuit for controlling a rotation speed of a fan of an electronic device according to a temperature of the electronic device. The circuit senses the temperature of the electronic device, and outputs a voltage changing with the sensed temperature. The rotation speed of the fan changes with the voltage.... Agent: Altis Law Group, Inc. Attn: Steven Reiss

20100327794 - Motor load control apparatus: A motor load control apparatus capable of suppressing heat generation of an electronic switch and suppressing occurrence of noise associated with rotation of a fan and vibration of the fan is provided. A switch section (17) in which a first electronic switch (T1) and a second electronic switch (T2) are... Agent: Sughrue-265550

20100327793 - Power transmission method and power transmission apparatus: Method and apparatus for controlling an apparatus transmitting power between two electricity networks or between an electricity network and a polyphase electric machine (M/G), which electricity networks can be polyphase alternating-current networks or one of them can be a single-phase direct-current network, and which apparatus comprises low-voltage power cells (C),... Agent: Birch Stewart Kolasch & Birch

20100327795 - Conveyor system: A conveyor system includes an electric motor to move a conveyor. A voltage determining device is coupled to an alternating-electricity source that supplies alternating electricity to the conveyor system. A power supply appliance supplies power between the electric motor and the alternating-electricity source. The power supply appliance includes an inverter... Agent: Venable LLP

20100327796 - Servomotor control system and servomotor unit: A servomotor control system includes: an integrated control unit for integrally controlling servomotors; and servomotor units coupled with the integrated control unit and the servomotors. Each servomotor unit includes: a motor driver; a rotation detector of the servomotor; an original point detector for detecting an original point of the servomotor;... Agent: Harness, Dickey & Pierce, P.L.C

20100327797 - Motor control apparatus and image forming apparatus: A motor control apparatus for controlling a DC motor includes a first detection unit configured to detect an angular velocity of the DC motor, a driven member configured to be driven by the DC motor, a control unit configured to perform, during start-up of the DC motor, feed forward control... Agent: Canon U.s.a. Inc. Intellectual Property Division

20100327798 - Applying a control unit to an asynchronous machine which is operated without a rotary encoder: Exemplary embodiments provide a method for connection or application of a converter to a rotating asynchronous machine which is operated without an encoder, without a high current and without a torque surge. The method provides a control unit, using an inverter or converter, for feeding the asynchronous machine which rotates... Agent: Hunton & Williams LLP Intellectual Property Department

20100327799 - Adjustable frequency drive and system: An adjustable frequency drive includes a base having a first portion and a second portion, and an active front end converter disposed on the base. The converter includes an input, an output, and a plurality of first electronic switches electrically connected between the input and the output. An inverter is... Agent: Martin J. Moran

20100320943 - Shape memory alloy driver: A shape memory alloy driver comprises a displacement detection portion, a drive control portion, and a compensation calculation portion. The displacement detection portion detects displacement of a shape memory alloy based on a resistance value etc. detected from the shape memory alloy. The drive control portion applies a voltage or... Agent: Sidley Austin LLP

20100320944 - Braking circuit for a door actuator with a generatively operable electrical motor: A braking circuit is adapted to supply generatively produced energy of the motor as load resistance to a bipolar transistor. The braking circuit has a voltage regulator, which controls a voltage, applied to the base terminal of the bipolar transistor to achieve an associated controlled voltage based on a reference... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20100320945 - Motor drive system using potential at neutral point: According to input parameters, a controller carries out: generation of a voltage command value for each of d- and q-axes; conversion of the voltage command value for each of the d- and q-axes into a voltage command value for each of the multiphase windings; and control of a multiphase inverter... Agent: Nixon & Vanderhye, PC

20100320947 - Method for calibrating a motor control circuit to improve temperature measurement in a electrical motor: A method enables measurement of an inverter loss within a motor control circuit for an appliance. The method includes applying a constant DC current generated from a first AC supply voltage to a motor winding through an inverter at a first duty cycle, measuring a first voltage corresponding to the... Agent: Maginot, Moore & Beck, LLP Chase Tower

20100320948 - Method and apparatus for increased current stability in a pwm drive: The present invention provides an improved current regulator for PWM based drives for electric motors. The invention provides compensation for the rotor position signal for delays introduced due to the PWM algorithm and for digital sampling present in such a drive. Current regulator commonly operate in a two-phase reference frame,... Agent: Rockwell Automation, Inc./bf

20100320950 - Inverter device: In a 2-shunt system, accurate sensorless vector control can be realized without increasing shunt resistors. There is disclosed an inverter device including an inverter main circuit obtained by connecting, in a three-phase bridge-like manner, three arms formed by coupling, in series with a direct-current power source, two switching elements which... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20100320949 - Multi output inverter: The present invention relates to a multi output inverter that is adapted to supply mains powered appliances (47-49) and/or poly-phase motors (50, 51). The inverter is also adapted to reduce ripple current.... Agent: Dann, Dorfman, Herrell & Skillman

20100320946 - Brushless dc motor driver: A brushless DC motor driver has a DC-AC converter circuit, a detection circuit, a comparison circuit and a control circuit. The DC-AC converter circuit has switching elements. The detection circuit is configured to detect an electric current flowing through a motor coil of a brushless DC motor. The comparison circuit... Agent: Cheng Law Group, PLLC

20100320951 - Inverter device, electric automobile in which the inverter device is mounted, and hybrid automobile in which the inverter device is mounted: A torque limit section that applies limit to a torque instruction value of an electric motor such that a switching elements temperature is restricted to no more than an element upper limiting temperature includes a torque restriction section that finds a torque restriction value for restricting the torque of the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100320952 - Overload protection device for motor: An overload protection device includes a motor, a transmitting shaft, a driving wheel, a resilient member, a sensor and a controller. The transmitting shaft including driving arm is meshed with the motor. The driving wheel is rotably engaged with the transmitting shaft at a distal end. The resilient member is... Agent: Altis Law Group, Inc. Attn: Steven Reiss

20100320953 - Methods and systems for diagnosing stator windings in an electric motor: Systems and methods are provided for diagnosing stator windings in an electric motor operating under control of a current-regulating control loop. The current-regulating control loop is configured to provide a command voltage to the electric motor. The command voltage comprises a current-regulated voltage based on a difference between a commanded... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20100320954 - Rotational velocity measurement of a rotor: A system is provided for measuring the rotational velocity of the rotor of an electric motor or generator having (i) a stator with a plurality of circumferentially spaced pole pieces, each pole piece having a corresponding armature winding, and (ii) a rotor with a plurality of circumferentially spaced magnet portions,... Agent: Oliff & Berridge, PLC

20100320955 - Motor drive device and electronic device that uses the same: In the motor drive device (1) of the present invention, a signal generator (2) for generating control signals DVS of a parallel input method from control signals INS of a clock input method is configured so as to generate control signals DVS of the second input method from the control... Agent: Fish & Richardson P.C. (ny)

20100320956 - Energy saving system and method for devices with rotating or reciprocating masses: A system and method are provided for reducing the energy consumed by a pump jack electric motor by reducing the supply voltage to the motor when the motor would be generating energy in open loop mode. By substantially eliminating the energy generation mode, the braking action of the utility grid... Agent: Strasburger & Price, LLP Attn:IPSection

20100315024 - Inverter device: An inverter device includes a filter circuit, an inverter circuit, an electric current detecting circuit, a voltage detecting circuit, a control circuit for outputting a drive signal so as to switch switching devices ON and OFF and an internal power supply. The control circuit includes a shutdown circuit for stopping... Agent: Greenblum & Bernstein, P.L.C

20100315025 - Dynamic braking for electric motors: A system and method are provided for improved dynamic braking in AC motors with an electronic drive, and more particularly to using a current regulation circuit to control the current supplied to the motor to be in phase with the internal EMF voltage of the motor such that the braking... Agent: Withrow & Terranova, P.l.l.c.

20100315026 - Self starting method and an apparatus for sensorless commutation of brushless cd motors: A method and apparatus for electronic control of a direct current motor is disclosed based upon a sensorless commutation technique using voltage vector analysis. A voltage vector is produced by addition of supply phase voltage vectors of energized windings with the back-electromotive force vector of the unenergized winding. The resultant... Agent: Finch & Maloney PLLC

20100315029 - Drive method to minimize vibration and acoustics in three phase brushless dc (tpdc) motors: A control method for a sensor-less, brushless, three-phase DC motor. The effects of commutation on the motor may be minimized using a sinusoidal current drive on each electromagnet. The “off” times and/or the “on” times of the drive transistors controlling the electromagnets in a full “H-bridge” configuration drive scheme may... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20100315030 - Torque harmonic reduction control for switched reluctance machines: A controller for a switched reluctance machine (SRM) generates current commands that reduce torque harmonics generated by the SRM. The controller monitors the phase currents and rotor position of the SRM to estimate torque generated by the SRM. The current command signal is modified based on the difference between the... Agent: Kinney & Lange, P.A.

20100315027 - Procedures and control system to control a brushless electric motor: The present invention relates to a method and a control system for driving a three-strand brushless, electronically commutated electric motor (2), wherein a line AC voltage (UN) is rectified and fed via a slim DC link (8) with minimum DC link reactance as a DC link voltage (UZ) to an... Agent: Brinks Hofer Gilson & Lione/ann Arbor

20100315028 - Photon motor control: A motor having an alternating current electrical source, a light power circuitry, a stationary transcutaneous energy transmission coil spaced from a rotatable transcutaneous energy transmission coil, a plurality of phototransistor arrays positioned on a rotatable platform and each phototransistor array corresponds to and rotates in conjunction with an armature winding... Agent: Kevin D. Mccarthy Roach Brown Mccarthy & Gruber, P.C.

20100315031 - Linear actuator: Linear actuator comprising a housing with a reversible DC-motor, which through a transmission can displace an activation element between two end positions, where an further switch located in the longitudinal direction of the spindle is activated and deactivated when the spindle nut passes during its travel on the spindle and... Agent: Dykema Gossett PLLC

20100315032 - Method for determining the angular position of the rotor of a mechanically commutated dc servo motor: Method for determining the angular position of the rotor of a mechanically commutated DC servo motor (5), which is arranged in the transverse branch of a bridge circuit, and the armature current of which is preset by an electromechanically activated switching device (28), —with a control and analysis unit (17)... Agent: King & Spalding LLP

20100315033 - System and method of dynamic regulation of real power to a load: A system and method for controlling an AC motor drive includes a control system programmed with an energy algorithm configured to optimize operation of the motor drive. Specifically, the control system receives input of an initial voltage-frequency command to the AC motor drive, receives a real-time output of the AC... Agent: Ziolkowski Patent Solutions Group, Sc (eaton)

20100315034 - System and method of dynamic regulation of real power to a load: A system and method for controlling an AC motor drive includes a control system programmed with an energy algorithm configured to optimize operation of the motor drive. Specifically, the control system input an initial voltage-frequency command to the AC motor drive based on an initial voltage/frequency (V/Hz) curve, receives a... Agent: Ziolkowski Patent Solutions Group, Sc (eaton)

20100308756 - Image forming apparatus and method of controlling motors thereof: An image forming apparatus includes a plurality of motors, a controller which generates control signals to control the plurality of motors and output the control signals, and a plurality of motor drivers which control corresponding motors among the plurality of motors if the enable signal among the control signal is... Agent: Stanzione & Kim, LLP

20100308757 - Alternating-current motor control apparatus: An alternating-current motor control apparatus includes an inverter unit, a current-command divider, a current controller, a torque-variation calculator, and a phase angle generator. The inverter unit is configured to output a command voltage to an alternating-current motor. The current-command divider is configured to divide a command current amplitude into command... Agent: Ditthavong Mori & Steiner, P.C.

20100308758 - Back emf sensing interface circuit: A back EMF signal from PWM driven motor is passed through an attenuation circuit. The attenuation circuit has a first mode of operation and a second mode of operation. The first mode of operation, used to sample a higher voltage back EMF signal during PWM on-time, applies the back EMF... Agent: Stmicroelectronics, Inc.

20100308759 - Method and control system for controlling a synchronous electric machine: A method of controlling an electric synchronous machine (2) having a stator and a moving part comprises the following steps: operating the machine (2) with a deceleration moment (MP) so that a moving part speed of the machine is reduced, monitoring the moving part movement of the machine, and upon... Agent: Baker & Daniels LLP

20100308760 - Circuit and method for driving motor: A cycle counter generates a cycle signal which indicates, in the form of a digital value, the cycle of Hall signals H+ and H− that indicate the position of a rotor of a motor to be driven. An up/down counter repeatedly alternates between counting “up” and counting “down” upon detecting... Agent: Cantor Colburn LLP

20100308761 - Motor driver control method, motor driver control device, motor control device, and image forming apparatus: A disclosed motor driver control device is configured to control a plurality of switching devices that drive a motor. The motor driver control device includes a duty control unit configured to restrict a duty of a first pulse width modulation signal generated by comparing an oscillator signal generated at a... Agent: Cooper & Dunham, LLP

20100308762 - Safety arrangement of a transport system: The invention relates to a method and an appliance for monitoring the safety of a transport system (1). The transport system comprises a transport appliance (2) and also a synchronous motor (3) for moving the transport appliance. In the method the motion information of the transport appliance is determined with... Agent: Birch Stewart Kolasch & Birch

20100308763 - Motor drive apparatus: A motor drive apparatus for driving a motor in a normal rotation direction or a reverse rotation direction in accordance with a state of operation of an operation switch has a first semiconductor switching device that switches ON/OFF state based on a normal rotation instruction provided by the operation switch,... Agent: Osha Liang L.L.P.

20100308764 - Motor controller and electric tool having the same: A motor controller comprises a processor selectively outputting an on-signal to either one of an upper arm switching element and a lower arm switching element based upon a detected position by the position sensor, gate drivers inputting a driving voltage to the gates of the switching elements by shifting a... Agent: Oliff & Berridge, PLC

20100301783 - Arrangement having an oscillating motor and a method for controlling an oscillating motor: The invention relates to an arrangement having an oscillating motor (100), a control circuit (20) for controlling the motor (100), a sensor arrangement (5) for determining an electric characteristic of the motor (100) at a predetermined measuring time (t1, t2, t3) or in a predetermined measuring position (xM1, xM2 xM3)... Agent: The Procter & Gamble Company Global Legal Department - Ip

20100301784 - Power conversion circuit: In a power conversion circuit operating with high frequency, an off-voltage control circuit 101u of a lower-arm gate drive circuit 24u controls the output voltage of a gate drive power supply 103u to change the output voltage to a voltage lower than a predetermined off voltage during a time period... Agent: Mcdermott Will & Emery LLP

20100301785 - Method and apparatus for electromagnetically braking a motor: An electromagnetic braking system and method is provided for selectively braking a motor using an electromagnetic brake having an electromagnet, a permanent magnet, a rotor assembly, and a brake pad. The brake assembly applies when the electromagnet is de-energized and releases when the electromagnet is energized. When applied the permanent... Agent: Quinn Law Group, PLLC

20100301786 - Methods, systems and apparatus for controlling operation of two alternating current (ac) machines: A system is provided for controlling two AC machines. The system comprises a DC input voltage source that provides a DC input voltage, a voltage boost command control module (VBCCM), a five-phase PWM inverter module coupled to the two AC machines, and a boost converter coupled to the inverter module... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20100301787 - Methods, systems and apparatus for controlling operation of two alternating current (ac) machines: A system is provided for controlling two alternating current (AC) machines via a five-phase PWM inverter module. The system comprises a first control loop, a second control loop, and a current command adjustment module. The current command adjustment module operates in conjunction with the first control loop and the second... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20100301789 - Control of electrical machines: This invention relates to the control of electrical machines and is concerned more particularly, though not exclusively, with the control of flux switching brushless permanent magnet and switched reluctance electrical machines without a mechanical shaft position sensor. Brushless Reluctance and permanent magnet motors can be used in many applications, since... Agent: Mark D. Saralino (general) Renner, Otto, Boisselle & Sklar, LLP

20100301788 - Control device for electric motor drive device: A control device that includes an AC voltage command determination section that determines an AC voltage command value, which is a command value of the AC voltage supplied from the DC/AC conversion section to the AC electric motor, on the basis of a target torque of the AC electric motor... Agent: Oliff & Berridge, PLC

20100301790 - Rotor position estimator for an electrical machine: A method for estimating a rotor position in an electrical machine is provided. The method is applicable to electrical machines that have magnetic saliency. The method includes extracting the rotor position from a demodulated output signal generated in response to an injected high frequency carrier signal and determining a position... Agent: Susan M. Donahue Rockwell Automation, Inc./fy

20100301791 - Bridge rectifier circuit: A bridge rectifier circuit, which takes control of a current flowing through an armature winding of a motor-generator and a battery, includes rectifier elements each made of a MOSFET; phase current detection means that detect the amount and the direction of current flowing between the drain and the source of... Agent: Sughrue Mion, PLLC

20100301792 - Detection of rotor side anomaly in an induction machine: A method for detecting an anomaly in an induction machine includes obtaining or receiving a signal from the induction machine; processing the signal so as to obtain a low frequency signal, then rectifying the low frequency signal; and, declaring if the anomaly is present, based on the rectified low frequency... Agent: General Electric Company Global Research

20100301793 - Power supply arrangement: The invention relates to a frequency converter, which is fitted to supply power between a polyphase alternating electricity source and an electric machine. The frequency converter comprises a network rectifier connected to the alternating electricity source and an inverter connected to the electric machine. The power supply is implemented in... Agent: Birch Stewart Kolasch & Birch

20100301794 - System and method including feed-forward control of a brushless synchronous motor: A drive system, such as for a fluid jet cutting system, includes a brushless synchronous motor configured to drive movement through a loosely coupled transmission, a sensor configured to sense movement, and a control system configured to drive the brushless synchronous motor responsive to previously measured drive coupling.... Agent: Graybeal Jackson LLP

20100301795 - Drive unit of pressure device: A drive unit of a pressure device, such as a welding gun, includes a piezoelectric type load cell adapted to be arranged in an easily attached and removed manner and to have relatively small capacity. The drive unit includes a through-hole 6, formed in a rotary shaft 5 of a... Agent: Bacon & Thomas, PLLC

20100301796 - Reciprocating actuator with closed loop servocontrol: A reciprocating actuator includes at least one element moving reciprocally relative to a rack, a device for driving the moving element in a driving direction, an element for returning the moving element in an opposite direction, at least one sensor for detecting the position of the moving element, and a... Agent: Young & Thompson