Abstract: A control method for a fuel cell system, the fuel cell system including a hydrogen storage part and a fuel cell stack that generates electric power using hydrogen supplied from the hydrogen storage part, the fuel cell system being mounted on a towed portion of a moving body that includes the towed portion and a towing portion, the fuel cell system being electrically connected to the towing portion, the towing portion including a battery and a drive device performing driving in response to supply of electric power, the towed portion being towed by the towing portion, the control method includes: acquiring remaining amount information indicating a remaining amount of the battery, and starting supply of electric power to the towing portion when it is determined that the remaining amount of the battery is equal to or less than a threshold based on the remaining amount information.

Abstract: A control system of a flexible permanent magnet brushless DC motor, comprising a DC power supply, a filter capacitor, a voltage source inverter, a permanent magnet brushless DC motor and a controller, wherein an output end of the DC power supply is connected with the filter capacitor in parallel; the voltage source inverter is provided with m bridge arms which are connected with both ends of the filter capacitor in parallel; upper and lower controllable switching devices are arranged on each bridge arm; the phase number of armature winding of the permanent magnet brushless DC motor is equal to the number of bridge arms; head ends of armature windings of each phase are correspondingly connected with intermediate contacts of the upper and lower controllable switching devices of one bridge arm, tail ends of armature windings of each phase are connected together.

Abstract: A method for controlling an electric motor including a mechanical commutator, includes determining points in time at which commutation takes place by a sensor or without a sensor. The method further includes controlling the electric motor by a supply voltage signal having a sequence of pulses. The method further includes modulating the supply voltage signal by a modulation signal to reduce the magnitude of the supply voltage signal at the commutation points in time.

Abstract: The present disclosure provides a vibrator driving method, including steps of: obtaining a preset vibration frequency and a resonant frequency of a target vibration motor; obtaining total harmonic distortion of the target vibration motor; obtaining at least one low distortion point of the target vibration motor according to the total harmonic distortion; obtaining a target vibration frequency according to a low distortion frequency of at least one low distortion point and the preset vibration frequency; driving the target vibration motor to vibrate according to the target vibration frequency. The present disclosure further provides a vibration driving system and a vibration driving equipment.

Abstract: The present invention relates to a variable speed drive for driving an electric motor and providing a safe torque off (STO) function. The drive includes two parallel signal buffers connected to a safety controller and at least one IGBT gate driver circuit, wherein the signal buffers share the same IGBT gate control signals as inputs and feed them to the same IGBT gate driver circuits and wherein each signal buffer has an own STO control signal for activation and deactivation of outputs. The invention is also directed at a method for diagnosing a corresponding drive.

Abstract: Provided is an electric dual-mode wiper system for a railway vehicle. The electric dual-mode wiper system for a railway vehicle includes a first wiper drive unit and a second wiper drive unit, and controls a synchronization operation of the first wiper drive unit and a second wiper drive unit.

Abstract: An inverter integrated gas supply device includes a fluid machine configured to discharge air, an electric motor having a motor casing and configured to drive the fluid machine, an inverter having an inverter casing and configured to supply a drive current to the electric motor, a motor-side connection part attached to the motor casing and configured to receive the drive current, and an inverter-side connection part attached to the inverter casing, connected to the motor-side connection part. The motor-side connection part includes a motor-side connector housing, and a motor connector. The inverter-side connection part includes an inverter-side connector housing, and an inverter connector. A position of the motor connector relative to the motor-side connector housing is fixed; and a position of the inverter connector relative to the inverter-side connector housing is variable.

Abstract: In a power conversion device for performing conversion from DC to AC, a positive-side capacitor and a negative-side capacitor with their connection point serving as a neutral point are provided between the positive and negative sides of the inputted DC power, and a switching pattern for specifying switching phases which are timings of ON/OFF driving switching elements of an inverter which outputs AC voltage having at least a positive-side potential, a negative-side potential, and a neutral point potential, is calculated so as to satisfy conditions for ensuring a modulation factor, eliminating harmonic components for respective orders of output voltage, ensuring a predetermined value for a phase difference between adjacent switching phases, and balancing voltage of the positive-side capacitor and voltage of the negative-side capacitor.

Abstract: A method for operating a voltage source inverter is provided, the method including inducing, via the voltage source inverter, a DC current at a load device to obtain a load voltage value; determining an ideal switching-averaged voltage based on a switching modulation scheme; determining a combined semiconductor voltage drop and deadtime effect; and adjusting the switching modulation scheme such that a resulting ideal switching-averaged voltage is based on the combined semiconductor voltage drop and deadtime effect and the load voltage value.

Abstract: The disclosure includes a control system for a multi-phase electric machine that includes an inverter configured to transfer electric energy from a rechargeable energy storage device (RESS), and phase current sensors. A controller includes an executable instruction set to monitor, via the phase current sensors, the phase currents, and detect that one of the phase currents is outside a linear measurement range of a respective one of the phase current sensors. An extrapolated current for the respective one of the phase current sensors is determined based upon the phase currents from others of the phase current sensors. A current extrapolation routine evaluates the respective one of the phase current sensors. A fault is detected in the respective one of the phase current sensors based upon the current extrapolation routine and the extrapolated current.

Abstract: Provided is a servo amplifier system performing a multi-axis control for multiple axes, in which the multiple axes includes a first axis group which an axis to be locked, at the time of power supply abnormality in the multi-axis control, belongs to, and a second axis group which an axis to be subjected to servo-off belongs to, the servo-off being made before the axis belonging to the first axis group is locked at the time of the power supply abnormality.

Abstract: A step motor drive device includes a step motor including a rotor, stators, and a coil, a drive circuit that outputs a drive signal including a plurality of partial signals that are output intermittently, a detecting circuit that detects an electromagnetic induced current that is generated in the coil after the partial signals are output, and a control unit that controls the drive circuit. The drive circuit outputs one of the partial signals included in the drive signal to the coil, and, in response to a change in an electromagnetic induced current generated in the coil after the partial signal is output, outputs a next partial signal to the coil. The control unit determines a control method of the step motor based on an interval of the plurality of partial signals, and controls the drive circuit based on the determined control method.

Abstract: An electronic device may include: a power management integrated circuit (PMIC); and a micro controller unit (MCU) electrically connected to the PMIC. The MCU may be configured to: generate, based on a first driving power signal output from the PMIC to drive the MCU, a digital signal for determining an error in a reference signal of an analog-to-digital converter (ADC) included in the MCU; identify an error rate of the digital signal; and determine a mode for controlling a motor driven power steering system, based on the error rate of the digital signal.

Abstract: A linear motor system, which is in particular a transport system and, for example, a multi-carrier, comprises a guide track having a plurality of electromagnets arranged distributed along the guide track; at least one carrier that is guided by and movable along the guide track and that comprises a drive magnet for cooperating with the electromagnets of the guide track to move the carrier; and a control device for controlling the movement of the carrier relative to the guide track by a corresponding control of the electromagnets. The guide track has at least one stationary transmission device that is provided for supplying energy and that is located at a predetermined position. The carrier comprises a corresponding reception device, which is configured to receive energy from the transmission device of the guide track, and an energy consumer.

Abstract: A method for operating a microgrid electric power generation system includes delivering energy to an electric power bus at least partially from one or more kinetic generators electrically coupled to the electric power bus, controlling the one or more kinetic generators in response to a change in a load such that a magnitude of a voltage on the electric power bus remains within a predetermined voltage range, and controlling one or more combustion generators electrically coupled to the electric power bus based at least in part on an operating state of the one or more kinetic generators. The one or more kinetic generators are capable of (a) delivering energy stored therein to the electric power bus, and (b) storing energy in kinetic form.

Abstract: This application provides a power supply system for a motor control module and a vehicle. The power supply system includes a first current limiting unit and an isolation unit. An output end of a first direct current power supply is coupled to a first input end of the isolation unit to form a first power supply loop with the isolation unit. A first output end of a second direct current power supply is coupled to one end of the first current limiting unit. Another end of the first current limiting unit is coupled to a second input end of the isolation unit to form a second power supply loop with the isolation unit. The second power supply loop is connected in parallel to the first power supply loop.

Abstract: A motor drive control device includes a control unit monitoring a rotational state of a rotor of a two-phase stepping motor, setting an energization angle ? representing a magnitude of an electric angle for continuously energizing, of coils of two phases of the two-phase stepping motor, a coil of one phase in one direction based on the rotational state of the rotor, and generating a control signal Sd for controlling driving of the two-phase stepping motor based on the set energization angle ?, and a drive unit driving the coils of two phases based on the control signal Sd.

Abstract: A charging station capable of guiding a self-driving device to interface includes a base plate installed in a working area to fix the self-driving device; a first wire surrounding on the base plate and connected to a signal generator independently of a boundary; a second wire surrounding on the base plate and connected to the signal generator independently of the boundary and the first wire; and the signal generator sending a guide signal to the first wire and/or the second wire; where multiple areas surrounded by the first wire and the second wire include at least a first area having a first magnetic field signal, a second area having a second magnetic field signal, and a third area having a third magnetic field signal.

Abstract: A load driving device includes a smoothing capacitor, an inverter, and a control unit. The inverter includes two legs, each including upper and lower arm switching elements connected in series and converts direct-current power stored in the smoothing capacitor into alternating-current power. The control unit performs voltage drop prevention control for preventing the voltage across the smoothing capacitor from becoming a negative voltage. The control unit stops power running control on the load when the capacitor voltage is higher than the sum of a first voltage and a second voltage. The first voltage is a potential difference between a second terminal and a first terminal in the upper-arm. The second voltage is a potential difference between a second terminal and a first terminal in the lower-arm in the same leg as the leg of the upper-arm.

Abstract: One or more embodiments are provided for an inverter. The inverter includes a phase switch configured to supply AC power via an output terminal. The phase switch includes a high-side leg and a low-side leg. The high-side leg includes a high-side solid-state switch configured to selectively conduct current between a high-side conductor of a DC bus and the output terminal, and the low-side leg includes a low-side solid-state switch configured to selectively conduct current between the output terminal and a low-side conductor of the DC bus. The high-side solid-state switch has a first conducting-state resistance value, and the low-side solid-state switch has a second conducting-state resistance value different than the first conducting-state resistance value. A shunt resistor may be connected in series with a corresponding one of the high-side solid-state switch or the low-side solid-state switch, balancing the resistances of the high-side leg and the low-side leg.