The disclosure relates to a power circuit for power supply in an electrically driven vehicle. The power circuit includes a direct voltage connection, an electrical traction drive, and a DC/AC converter. The converter includes an alternating voltage side connected to the traction drive. A DC/DC converter of the power circuit includes two converter sides. The first converter side is connected to a direct voltage side of the DC/AC converter via a coupling point. The direct voltage connection is likewise connected to the coupling point. The disclosure further relates to a stationary energy supply system designed to be complementary and to connect to the power circuit.

Disclosed are a single-phase photovoltaic inverter and a control method thereof in which a small insulated transformer and an ordinary current transformer are used to measure a leakage current instead of a high-priced current transformer that is only used to measure a leakage current. The single-phase photovoltaic inverter that converts DC electric power supplied from a single-phase photovoltaic module into AC electric power includes an input terminal including a first input terminal connecting to a positive polarity of the single-phase photovoltaic module and a second input terminal connecting to a negative polarity of the single-phase photovoltaic module, an inverter unit configured to convert DC electric power supplied through the input terminal into AC electric power and supply the converted AC electric power to a grid, and a leakage current measuring unit connected in parallel with the inverter unit and configured to measure a leakage current delivered through the input terminal.

A digital controller for a switching converter configured to receive an input voltage at an input voltage node and to generate an output voltage at an output voltage node, the switching converter comprising one or more power switches and an energy storage element, the digital controller comprising a pulse width modulation control circuit configured to receive the output voltage and to generate a PWM control signal to control the switching operation of the one or more power switches, and switching circuitry configured to couple the pulse width modulation control circuit to the input voltage node during a first phase, and couple the pulse width modulation control circuit to a supply voltage node during a second phase, the supply voltage node being at a supply voltage.

An energy conversion device is provided. The device includes: a reversible pulse width modulation (PWM) rectifier (11) and a motor coil (12), where the motor coil (12) includes at least a first winding unit and a second winding unit, and the first winding unit and the second winding unit are both connected with the reversible PWM rectifier (11). The first winding unit is connected with at least one of neutral lines in the second winding unit, where at least one neutral line of at least one of the winding units is connected with a first end of a first direct current (DC) charging and discharging port (3), the reversible PWM rectifier (11) is connected with a first end of a external battery (2) and a second end of the external battery (2) respectively, and a second end of the first DC charging and discharging port (3) is connected with the second end of the external battery (2).

Apparatus is provided comprising an electrical motor comprising a rotor and a stator, the rotor comprising a plurality of rotor teeth and the stator comprising a plurality of stator teeth. The apparatus has a driver circuit to drive the electrical motor comprising a boost converter comprising a charge storage element and coupled to a first terminal of a coil winding on at least one of the plurality of stator teeth, and a buck converter comprising the same charge storage element and coupled to the same first terminal of the coil winding on the at least one of the plurality of stator teeth. An inductive element of the boost converter and the buck converter is provided by the coil winding of the at least one of the plurality of stator teeth, and the charge storage element is referenced to a supply node for coupling the second terminal of the coil winding to an electrical supply.

A power converter circuit and an associated method of converting an AC power supply. The power converter circuit comprises: a supply rectifier circuit (2) for rectifying an AC supply power to generate a rectified supply power; an inverter circuit (3) for receiving the rectified supply power to generate an inverted supply power; a load rectifier circuit (4) for rectifying the inverted supply power to generate a rectified load power for supplying a load current to a load (5); and a boost circuit (6) driven by the load current to provide a boosted voltage to the rectified supply power.

A direct-current power supply device includes a rectifier connected to a power supply, a charge storage unit configured by a first capacitor and a second capacitor connected in series, a switching unit configured by a first switching element 4a and a second switching element connected in series and backflow preventing elements that suppress a backflow of electric charges from the charge storage unit, a reactor, a control unit that controls operations of the first switching element and the second switching element, and a direct-current-voltage detecting unit that detects a first both-end voltage, which is a voltage across the first capacitor, and a second both-end voltage, which is a voltage across the second capacitor. The control unit detects, on the basis of a voltage difference between the first both-end voltage and the second both-end voltage, a short-circuit failure of one of the first switching element and the second switching element.

Disclosed examples include high-efficiency integrated circuits and inductive capacitive DC-DC converters with a first converter stage including first and second switches and an inductor, and a second converter stage including third and fourth switches and a flying capacitor. A dual mode control circuit regulates output voltage signal in a first mode when the output voltage signal is below a threshold by pulse width modulating the switches of the first converter stage. When the output voltage exceeds the threshold, the control circuit operates in a second mode with a first state to close the first and third switches, and a second state to close the fourth switch to connect the inductor in series with the flying capacitor. Dual mode operation of the first and second stages facilitates buck-boost operation with reduced inductor losses and converter switching losses, and the integrated circuit can be used in boost, buck or other configurations.

This application provides a powertrain, a control method for a motor controller, and an electric vehicle. The powertrain includes a motor controller and a drive motor, the motor controller includes three bridge arms connected in parallel, and a bridge arm midpoint of one of the three bridge arms is configured to connect to the other end of the direct current power supply. In response to that the direct current power supply switches from outputting a direct current to stopping outputting the direct current, an upper bridge arm switching transistor of one bridge arm of the other two bridge arms of the three bridge arms is turned on and a lower bridge arm switching transistor of the other bridge arm of the other two bridge arms is turned on. The power battery is configured to supply power to one phase winding and another phase winding, to reduce slipping sound.

A circuit is provided, including first and second input terminals (110, 112) an output terminal (114), a DC-to-DC converter (120), and a trifilar choke (130) including a first inductor (140) connected between the first input terminal (110) and a first input terminal (150) of the converter (120), a second inductor (142) connected between the second input terminal (112) and a second input terminal (152) of the converter (120), and a third inductor (144) connected between the output terminal (114) and an output terminal (154) of the converter (120). The converter (120) is configured to convert a first voltage (V.sub.1) received at its first and second input terminals (150, 152) to a second voltage (V.sub.2) at its output terminal (154) higher than the first voltage (V.sub.1). The first, second and third inductors (140, 142, 144) are wound on a same core, mutually coupled and arranged such that currents common to the first and second inductors (140, 142) and currents common to the second and third inductors (142, 144) are blocked or attenuated. A current-limiting device, battery modules and a method of noise filtering are also provided.