Abstract: A device may receive a current measurement of a motor identifying a plurality of component currents associated with a plurality of phases. The device may determine a position estimate for the motor based on the plurality of component currents associated with the plurality of phases. The device may control the motor based on the plurality of component currents.

Abstract: A method for controlling an electric motor, implemented in a variable speed drive, the variable speed drive being connected to the electric motor through a transformer, the method including; executing an identification sequence of the transformer for determining gain data corresponding to an inverse function of a transfer function of the transformer; generating a transfer module based on said determined gain data; determining a start-up sequence of the electric motor to be implemented by the variable speed drive by executing the transfer module on a reference current path.

Abstract: A winch and plow control system is disclosed. The winch and plow control system enables automatic control of a plow attached to a vehicle in order to raise and lower the plow based upon a vehicle parameter. The vehicle parameter can be a gear input that is monitored to automatically raise and lower the plow depending upon the gear selected. Wireless and remote control of the winch is also available, as well as a back-dragging automatic plow mode and a normal automatic plow mode.

Abstract: A rotation speed of a motor is estimated based on a current value of the motor, and rotation control on the motor is performed at a first cycle. Processing for detecting a loss of synchronism in the motor based on the current value is performed at a second cycle that is shorter than the first cycle.

Abstract: Methods and apparatus for controlling a three-phase motor and providing sinusoidal phase currents during startup. In embodiments, differential outputs from a magnetic field sensing element are used to generate a polarity signal used to provide a motor direction drive signal. An amplitude signal derived from the magnetic field sensing element and a measured motor current are used to generate a current amplitude signal. A PWM module generates signals for driving the motor with sinusoidal phase currents from the current amplitude signal and the motor direction drive signal.

Abstract: This is to reduce electromagnetic noise while reducing a calculation load of a microcomputer. An inverter drive device according to the present invention switches a first control mode, a second control mode, and a third control mode on the basis of vehicle speed information in a motor control device that controls a power converter that drives a polyphase motor by a PWM pulse signal based on a carrier signal, the first control mode being for updating a command voltage signal to the power converter only on a ridge side or a trough side of the carrier signal, the second control mode being for updating a command voltage signal to the power converter both on a ridge side and a trough side of the carrier signal, and the third control mode being for updating a command voltage signal to the power converter only once of ridge-trough-ridge or trough-ridge-trough of the carrier signal.

Abstract: Provided is a method for the computer-assisted operation of an electric motor which is exposed to a thermal load as a result of the rotational motion of its rotor during operation. In this method, measured data is received during the operation of the electric motor. One or more temperature values are derived from the measured data. A number of temperature characteristics curves are then forecast with differing restart times for defining a cooling period for reducing the thermal load on the electric motor, wherein the approximated temperature value, which results from the approximated temperature value is used as the specific starting value for a restart in the temperature characteristics curve to be forecast.

Abstract: A rotating electrical machine capable of achieving a high torque and low noise is provided. In a stator for a rotating electrical machine in which six or more slot conductors are inserted through one slot, the stator for a rotating electrical machine straddles slots such that a slot pitch of a jumper wire connecting round windings having different positions in a radial direction has at least two kinds or more different slot pitches.

Abstract: A motor drive device includes a storage unit that stores an initial value of a static capacitance correlation value of a static capacitance of a smoothing capacitor in an initial state, when the smoothing capacitor is connected to an inverter. A measurement unit of the motor drive device includes a timing generation circuit and a calculation unit. The measurement unit measures the static capacitance correlation value of the smoothing capacitor as a measured value at a time after the initial state. A determination unit of the motor drive device determines whether there is deterioration in the smoothing capacitor based on a relationship between the measured value and the initial value. A restrictor of the motor drive device restricts a maximum rotation number of a motor when capacitor deterioration is determined, thereby reducing a ripple current, limiting heat generation in the capacitor, and extending the product life of the capacitor, without increasing the number of parts in the motor drive device.

Abstract: A six-wire three-phase motor that can realize both of increasing an output and reducing a torque ripple is provided. A six-wire three-phase motor is a six-wire three-phase motor including: a stator including a winding wire wound independently between phases; and a rotor including a plurality of magnets in a circumferential direction, wherein the stator or the rotor is configured in such a manner that a third harmonic current component in a motor current of when an overmodulation voltage based on a PWM signal is applied becomes higher than a third harmonic current component in a motor current of when a sinusoidal modulation voltage based on the PWM signal is applied.

Abstract: A rotary electric device control device controls driving of a rotary electric device including a plurality of winding sets. The rotary electric device control device includes: a plurality of drive circuits; and a plurality of control units. The control units include signal output units for outputting control signals to the drive circuits corresponding to the control units, respectively, and communicate with each other. The control units include: one master control unit; and at least one slave control unit. An electric power steering device includes: a rotary electric device control device; the rotary electric device that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric device to a drive target.

Abstract: A spring-loaded drive for a high-voltage power switch contains at least one spring and at least one tensioning motor for the at least one spring. The spring-loaded drive contains at least one rectifier circuit, which is formed by a plurality of diodes where precisely one diode is connected in series to the tensioning motor.

Abstract: An electronic circuit includes a first switch driver, a second switch driver, and a switch node coupled to the first and second switch drivers, and configured to couple to a motor. The electronic circuit also includes slew rate measurement circuitry coupled to the switch node and configured to measure a slew rate of switching operations at the switch node. The electronic circuit also includes a controller coupled to the first switch driver, to the second switch driver, and to the slew rate measurement circuitry, and configured to compare a measured slew rate provided by the slew rate measurement circuitry with a target slew rate, and to selectively adjust control signals to at least one of the first and second switch drivers based on a comparison result. The first and second switch drivers are configured to drive switches to power the motor based on the control signals.

Abstract: A motor control apparatus includes: a current detection unit configured to detect currents flowing through a plurality of coils of a motor, and includes a first detection unit that detects a current flowing through a first coil of the plurality of coils, and a second detection unit that detects a current flowing through a second coil of the plurality of coils; a determination unit configured to perform determination processing for determining a stopping position of a rotor of the motor based on a detection result of the current detection unit; and a calibration unit configured to calibrate the second detection unit based on a detection result of the first detection unit and a detection result of the second detection unit when a current is flowing in a series connection of the first coil and the second coil in the determination processing.

Abstract: A method for controlling operation of a MEMS mirror includes steps for: generating activation pulses for operating the MEMS mirror and generating a window activation signal for current detection, with the window activation signal overlapping with an end of an activation pulse. The method also includes detecting current through a stator or a rotor of the MEMS mirror during the window activation signal and terminating a current activation pulse and the window activation signal in response to detecting a change in the direction of the current through the stator or the rotor of the MEMS mirror during the window activation signal.

Abstract: A programmable, electronically controlled sprinkler system has a hermetically sealed internal chamber which encloses all of the internal water flow, valves, mechanical and rotational components and a plurality of magnetic coupling arrangements which allow external motors to control operation of the internal mechanical components without requiring any hydraulic seals.

Abstract: An electric power control unit configured to control drive power of a three-phase alternating current to be supplied to an electric motor may include: an inverter configured to convert a direct current to the three-phase alternating current; first and second current sensors, each of which is configured to measure a first-phase current in the three-phase alternating current; third and fourth current sensors, each of which is configured to measure a second-phase current in the three-phase alternating current; and a controller configured to control the inverter, and under a condition in which the first current sensor fails, when measured values of the second, the third, and the fourth current sensors do not coincide with each other while the inverter is shut down, the controller may stop to further supply the drive power to the electric motor.

Abstract: Apparatus features a matrix converter having a signal processor or processing module configured to: receive signaling containing information about a motor winding temperature sensed inside a motor when the motor is not being required to produce torque and rotation; and determine corresponding signaling containing information about a controlled direct current (DC) level for applying to at least one motor winding of the motor in order to provide a desired level of heating to the motor, based upon the signaling received. The signal processor or processing module provides the corresponding signaling so controlled DC signaling is sent to the at least one motor winding of the motor. The signal processor or processing module also provides the corresponding signaling so alternating controlled DC signaling is sent to all three motor windings of the motor.

Abstract: An electric power system of a vehicle with an electric drive obtained by means of an electric machine; the electric power system has: a storage system provided with a first pack of chemical batteries and with a second pack of chemical batteries; a first electronic DC-AC power converter, which has a direct current side connected to the first pack of chemical batteries and an alternating current side connected to the electric machine; and a second electronic DC-AC power converter, which has a direct current side connected to the second pack of chemical batteries and an alternating current side connected to the electric machine, in addition and in parallel to the first electronic power converter, so that the electric machine can be controlled by the first electronic power converter or by the second electronic power converter.

Abstract: A power converter for an electric vehicle that converts output of a battery to driving an electric traction motor is disclosed. The power converter may include: a power switching element; a current sensor provided on a bus bar in which an output current of the switching element flows; a cooler cooling the switching element; a temperature sensor measuring a temperature of a coolant; and a controller controlling the switching element. The controller may be configured to: estimate a temperature of the current sensor based on the temperature of the coolant; determine a first and second correction values for the estimated temperature based on the output current and an input voltage applied to the switching element; and restrict a load on the switching element when a corrected temperature, which is obtained by adding the first and second correction values to the estimated temperature, exceeds a predetermined temperature threshold.