Abstract: A control device for a three-phase motor includes a drive circuit that converts DC power supply voltage into three-phase AC voltage and supplies the three-phase AC voltage to the three-phase motor, a first voltage detection unit that detects terminal voltage of three phases of the three-phase motor, and a control unit that detects a point at which a first voltage value, which is a detection value of the terminal voltage, intersects a predetermined zero-cross determination level as a zero-cross point, and controls the drive circuit based on a detection result of the zero-cross point. The control unit corrects the first voltage value by multiplying the first voltage value by a first coefficient inversely proportional to an output duty ratio with respect to the three-phase motor in a case where the output duty ratio is equal to or less than a predetermined threshold.

Abstract: Method for operating a DC motor, where the DC motor is supplied with a variable DC voltage via a bridge circuit from a supply voltage and formed by a first, a second, a third and a fourth controllable switch, wherein the DC voltage is varied by pulse width modulation of the control signals driving the controllable switches of the bridge circuit. A control arrangement drives the bridge circuit by pulse width modulation, after the first switch connecting the DC motor to the supply voltage has been switched off, switches on the second switch connected to a ground terminal, or vice versa. The control arrangement automatically inserts a drive pause between the first or second switch being switched off and the second or first switch being switched on, whereby a bridge circuit voltage present at the DC motor is limited by a resultant maximum settable duty cycle to a maximum value.

Abstract: The present disclosure provides a portable power generating system configured to utilize self-sustained energy to provide velocity and movement to turn a central tubular axle which is encompassed by two or more magnets spread evenly around the circumference of the axle to generate motion. The motion of the revolving magnets turns the armature of one or more DC power generating motors which in turn produce electricity. The central tubular axle supported by two DC power generating motors are connected to each end of the central tubular axle. One of the DC power generating motors revolves in a clockwise direction during operation and the DC power generating motor at the opposite end of the central tubular axle is configured to operate in an anti-clockwise motion during operation.

Abstract: A blower motor control device stops energization to a motor when a rotation speed of a rotor reaches a learn rotation speed, and acquires a correction amount as a new learn value for correcting a position error of the rotor relative to a Hall element by using an induced voltage in a coil of the motor and a detection signal from a rotation sensor. The blower motor control device stores the new learn value in a ROM. The blower motor control device corrects the position error by using a previous learn value read from the ROM, for energization control of the motor, until the rotation speed reaches the learn rotation speed.

Abstract: A motor control device includes a control unit and a generation-method changer. The control unit generates a driving signal for driving a motor in accordance with a command signal and an encoder signal and outputs the generated driving signal to the motor, the command signal being a signal for setting the position of a moving part connected to the motor to a target position, the encoder signal indicating the position of the motor detected by an encoder. The generation-method changer changes a method used by the control unit to generate the driving signal in accordance with a position sensor signal indicating a detected target position that is the target position detected by a position sensor mounted on the moving part.

Abstract: A motor control device performs driving control of a motor via a drive circuit that converts a power supply voltage of a direct current power supply into a drive voltage of the motor. The motor control device includes a voltage measurement circuit that measures the power supply voltage. The motor control device acquires a detection signal correlated with a current value that is output from a current detection circuit.

Abstract: A technique provides power-limiting regenerative braking to a utility vehicle. The technique involves detecting that the utility vehicle is moving in a forward direction at a first speed. The technique further involves applying a first regenerative braking power level to the utility vehicle in response to detecting that the utility vehicle is moving in the forward direction at the first speed. The technique further involves detecting that the utility vehicle is moving in the forward direction at a second speed which is less than the first speed. The technique further involves applying a second regenerative braking power level to the utility vehicle in response to detecting that the utility vehicle is moving in the forward direction at the second speed. The second regenerative braking power level is lower than the first regenerative braking power level.

Abstract: A diagnostic voltage or current path can be used for each MEMS actuator control channel to detect and diagnose faults in the actuator control signal path. Multiple measurement points provide additional capabilities of isolating faults among multiple subassemblies or components in the control signal path. The diagnostic voltage or current path uses ADC(s) and multiplexers to monitor multiple control channels and/or multiple measurement points in each control channel. Digitized voltages, or currents in the case of magnetic actuators, read from the diagnostic ADC are compared to expected values to detect and isolate faults.

Abstract: A method, apparatus, and control system are described for operating a multiphase motor drive system including a rotary electric machine and an inverter. An AC choke filter is arranged proximal to output leads from the inverter. A reference temperature associated with the AC choke filter is determined along with an operating point of the electric machine. Operation of the inverter is controlled based upon a temperature of the AC choke filter, the reference temperature, and an operating point of the electric machine. This includes modifying a switching frequency and a PWM type in a manner that reduces the AC choke filter temperature by reducing the occurrence of switching events to protect the AC choke filter based on temperature feedback.

Abstract: A method for protecting a motor from overheating, includes: running a motor in a given parameter P and detecting a real-time temperature R of the motor; comparing the real-time temperature R with a plurality of set temperatures, the plurality of set temperatures including an overheating protection temperature Rm, shutdown temperature Rmax and recovery operation temperature Rmin, Rmin<Rm<Rmax; according to a comparison result, controlling the motor to operate at an initial current value I0, or operate in a reduced current value with respect to the initial current value I0, or stop running; and when the real-time temperature R meets the condition: Rm<R<Rmax, running the motor in an overheating protection mode, where the motor operates in a current value I lower than the initial current value I0, and the current value I decreases with the increase of the real-time temperature R.

Abstract: A motor driving system and a method of controlling same can protect a user by converting a driving mode into a dual inverter driving mode so that a vehicle can keep being driven when a transfer switching unit breaks down while the motor is operated in a Y-connection single inverter driving mode.

Abstract: Methods and apparatus to control engine speed of a power system are disclosed. An example power system includes: an engine; an air compressor configured to generate and store air pressure in an air storage tank based on mechanical power provided by the engine; and control circuitry configured to: monitor the air pressure in the air storage tank; determine a rate of air pressure change based on the monitoring of the air pressure; in response to the rate of air pressure change satisfying a threshold rate, incrementally increasing a speed of the engine; detecting a load on an AC auxiliary output; and in response to detecting the load on the AC auxiliary output, overriding an engine speed based on the air compressor, and controlling the speed of the engine to be the predetermined speed to output the predetermined frequency.

Abstract: A method of controlling a brushless permanent magnet motor includes determining a motor operating target. The method includes comparing the motor operating target to a set of pre-determined excitation timing parameter relationships. The method includes operating the motor in accordance with an excitation timing parameter relationship determined from the set of pre-determined excitation timing parameter relationships to provide a motor operating response close to the motor operating target. The method includes measuring a measured motor operating response, comparing the measured motor operating response to the motor operating target, and applying a correction factor to an excitation timing parameter of the motor when the measured motor operating response does not match the motor operating target, such that the measured motor operating response moves toward the motor operating target.

Abstract: An apparatus (100) for damping vibrations in electrical lines (10) through which modulated currents flow has at least one sound or vibration sensor (102) oriented towards the line (10) or attached to the line, at least one actuator (104) connected to the line, and a control circuit (200) which is supplied, via respective signal lines (108), with signals generated by the at least one sound or vibration sensor (102) that represent sound or vibrations. The control circuit controls the at least one actuator (104) via respective control lines (110) such that this actuator counteracts the vibration of the line (10).

Abstract: A motor control device drives first and second motors for outputting torque in braking or non-braking direction in a vehicle brake device, includes: an electric power converter that includes first to third legs having positive and negative switch elements; and a control unit. When the control unit energizes from the positive switch element of the first or third leg to the negative switch element of the second leg, the first and second motors output the torque in a same direction. When an absolute value of current flowing or estimated to flow in at least one of the first motor and the second motor exceeds a current threshold, the control unit drives the positive and negative switch elements of the second leg.

Abstract: A motor control apparatus includes: an excitation unit configured to excite a plurality of excitation phases of a motor; a measurement unit configured to measure a physical amount that changes according to an inductance of at least one of a plurality of coils that make up the plurality of excitation phases by exciting each of the plurality of excitation phases, and generate measured data that includes measurement values of the physical amount measured for the plurality of excitation phases; and a determination unit configured to determine, based on the measured data, a rotational position of a rotor of the motor and whether or not at least one of the motor and the excitation unit has a failure.

Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can increases decreases an increase amount of the current of d-axis in the negative direction appropriately, and can perform the weakening magnetic flux appropriately, irrespective of increase and decrease in the rotational angle speed, without using the information on the inductance and the interlinkage flux of the rotor. A controller for rotary electric machine, in a case where the current command value of q-axis is a positive value, changes the current command value of d-axis, based on a deviation between an offset q-axis current command value obtained by subtracting the q-axis offset value of the positive value from the current command value of q-axis, and the current detection value of q-axis.

Abstract: Provided is a driving apparatus that drives a switching device, the driving apparatus including a reference potential line, a first switching control unit configured to switch whether to connect a control terminal of the switching device to the reference potential line, a first resistor element arranged in series to the first switching control unit in a path from the control terminal of the switching device to the reference potential line, a first capacitor provided in parallel with the first resistor element in the path from the control terminal of the switching device to the reference potential line, and a discharge control unit configured to control whether to discharge the first capacitor.

Abstract: A power supply system 1 includes: a variable voltage power supply 7 that outputs power of a variable voltage E1 from a pair of secondary-side input/output terminals 72p and 72n; a first power line 21 and a second power line 22 that connect the pair of secondary-side input/output terminals 72p and 72n and a load 4; a first switch unit 31 that is provided on the first power line 21; a third power line 23 that connects both ends of the first switch unit 31; and a bypass line 25 that connects the pair of secondary-side input/output terminals 72p and 72n, a first DC power supply 38 is provided on the third power line 23 to output DC power, and a bypass diode 33a is provided on the bypass line 25 to allow an output current of the first DC power supply 38.

Abstract: A motor driving apparatus includes a first motor including first windings respectively corresponding to phases, a second motor including second windings respectively corresponding phases, a first inverter including first switching elements and connected to a first end of each of the first windings, a second inverter including second switching elements, a first changeover switch including third switching elements respectively connected to a second end of each of the first windings at one end and connected to each other at the other end, a second changeover switch including switches selectively connecting the second inverter with the second end of each of the first windings or the second inverter with a first end of each of the second windings, and a controller configured for controlling the states of the first switching elements, the second switching elements, the third switching elements and the switches based on preset conditions.