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.

A thermoelectric generator includes a voltage source including a thermoelectric element, a starting circuit connected to the voltage source, a DC to DC converter circuit connected to the voltage source, an output connected to the starting circuit and connected to the DC to DC converter circuit, and a controller having an input connected to the voltage source, and outputs connected to the starting circuit and to the DC to DC converter circuit. The controller deactivates the starting circuit and activates the DC to DC converter circuit when a voltage at the output or when a voltage provided by the voltage source rises above a predefined upper voltage threshold. Additionally, the controller reactivates the starting circuit and deactivates the DC to DC converter circuit when a voltage at the output or when a voltage provided by the voltage source drops below a predefined lower voltage threshold.

A voltage conversion apparatus for implementing zero-voltage switching based on recovering leakage inductance energy is provided. A leakage inductance energy recovery circuit is coupled to a primary side auxiliary winding and a control circuit, and recovers leakage inductance energy of a transformer circuit to supply an operating power to the control circuit. Before a main switch is turned on the next time, leakage inductance energy recovered previously is used to lower a cross-voltage of the main switch, so that transient loss of conduction of the main switch is eliminated or reduced, and circuit efficiency is improved.

A battery system for a vehicle may include: a charging apparatus configured to receive an alternating current power from the outside thereof in a wired/wireless manner; an on-board charger (OBC) configured to convert the alternating current power of the charging apparatus into a direct current power; a micro-control unit (MCU) configured to boost an output voltage of the OBC by use of a boost converter configured by a motor and an inverter; and a battery connected to the MCU and configured to be charged with the boosted output voltage.

Energetic firing device using a boost circuit to ensure an energetic fire circuit is charged to an All-Fire voltage even if a power source is not capable of providing necessary voltage. Boost circuit may be located between power source and energetic fire circuit and increase voltage provided by the power source when enabled. Boost circuit may be located between system logic and the energetic fire circuit and generate the All-Fire voltage when enabled. The boost circuit may generate the All-Fire voltage from an enable signal and a pulse train provided by the system logic. The boost circuit may be a switching power supply that may regulate the All-Fire voltage generated. The boost circuit may be a capacitive voltage multiplier. The boost circuit may remove power from being provided to the energetic fire circuit until enabled thus reducing system power and increasing safety.

A switching circuit for controlling charging input from a DC source to at least one inverter circuit, each inverter circuit corresponding to at least one respective battery, the switching circuit is provided with a switching device which when positioned in series with the inverter circuit and the DC source, the switching device configured to control the charging input provided to the at least one respective battery, the switching device controllable in conjunction with switches in the at least one inverter circuit based on at least one voltage of the at least one respective battery.

A DC-DC conversion scheme is described that includes a buck converter including a first switch connected in series with a first inductor, the first switch and first inductor providing a switched connected between an input and an output, a second switch being connected across output, and a DC boost arrangement connected between the first switch and the first inductor, the DC boost arrangement including second and third magnetically linked inductors, the second inductor being connected in series between the first switch and the first inductor, and the third inductor being electrically connected to a point intermediate the first and second inductors, the windings of the second and third inductors being such that a change in current flowing through the second inductor induces a boost current in the third inductor supplementing the current flowing through the second inductor.

Disclosed herein is a battery charger for electric vehicle includes a motor configured to generate power for driving the electric vehicle, an inverter configured to provide the power to the motor, an AC power input terminal configured to be input at least one AC power of single phase AC power and polyphaser AC power from a slow charger, a power factor corrector configured to include a plurality of full bridge circuits through which the AC power is input through the AC power input terminal, a link capacitor configured to connect in parallel with the power factor corrector, a switch network configured to include a first switch SW A provided to connect any one of a plurality of AC power input lines and a neutral line constituting the AC power input terminal with the power factor corrector, and a second switch provided to transfer one of a direct current power input from a quick charger and an alternating current power input from a slow charger to a high voltage battery and a controller configured to control the power factor corrector and the switch network according to the conditions of the AC power and the DC power.

An example voltage converter includes a transformer having a primary winding, a first secondary winding, and a second secondary winding; a first transistor connected between a first terminal of the first secondary winding and electrical ground, where the first transistor has a first drain; a second transistor connected between a second terminal of the second secondary winding and electrical ground, where the second transistor has a second drain; and a capacitor connectable along a current path to the transformer via at least one of the first transistor or the second transistor. A control system detects a first voltage at the first drain and a second voltage at the second drain, and generates pulse-width modulated control signals based at least on the first and second voltages to control operation of the first and second transistors to produce voltage at the primary winding based on a voltage across the capacitor.

An example voltage converter includes a transformer having a primary winding, a first secondary winding, and a second secondary winding; a first transistor connected between a first terminal of the first secondary winding and electrical ground, where the first transistor has a first drain; a second transistor connected between a second terminal of the second secondary winding and electrical ground, where the second transistor has a second drain; and a capacitor connectable along a current path to the transformer via at least one of the first transistor or the second transistor. A control system detects a first voltage at the first drain and a second voltage at the second drain, and generates pulse-width modulated control signals based at least on the first and second voltages to control operation of the first and second transistors to produce voltage at the primary winding based on a voltage across the capacitor.