A method of wirelessly transmitting power includes: causing a power transmission circuit to transmit, to a master power reception circuit, a portion of power it is capable of transmitting; adjusting operation of a slave power reception unit until a first rectified voltage produced by the master power reception circuit and a second rectified voltage produced by the slave power reception unit are equal; causing the power transmission circuit to transmit additional power to the slave power reception unit, resulting in the first and second rectified voltages being unequal; and adjusting operation of the slave power reception unit until the first and second rectified voltages are again equal. A dummy load is connected to the slave power reception unit prior to causing the power transmission circuit to transmit the additional power, and is disconnected once the first and second rectified voltages are equal.

A control device is applied to a power conversion system including a first power conversion device and a second power conversion device connected in parallel with a common power supply target. The control device acquires a load output including a load current or power to be supplied to the power supply target, and control operation of the first power conversion device and the second power conversion device based on at least any of a voltage parameter including any of an input voltage and an output voltage and the load output.

A converter includes two switching stages coupled in series between positive and negative input terminals. A control circuit is configured for driving the switching stages based on an output voltage of the converter. A first switching stage includes two switches coupled in series between a positive input terminal and a first node. A capacitor and an inductor are coupled in series between the two switches and a positive output terminal. A third switch is coupled between a node between the capacitor and the inductor and the negative input terminal. A second capacitor is coupled between the first node and the negative input terminal. A second switching stage includes a second node coupled to the first node. Two additional electronic switches are coupled in series between the second node and the negative input terminal. A second inductor is coupled between the two additional switches and the positive output terminal.

In some examples, a circuit includes an input circuit, an output circuit, an auxiliary circuit, and a balancing circuit. The input circuit comprises a primary capacitor coupled to primary windings of a transformer. The output circuit comprises a secondary capacitor coupled to secondary windings of the transformer, wherein the secondary windings are coupled to the primary windings. The auxiliary circuit comprises auxiliary windings coupled to the primary windings. The balancing circuit is coupled to the output circuit, the auxiliary circuit, and the input circuit. The balancing circuit is configured to balance a voltage across the primary capacitor with a voltage across the secondary capacitor.

The subject matter of the invention is a three-phase resonant DC-DC voltage converter, notably for an electric or hybrid vehicle, said converter including a plurality of resonant circuits. First inductive elements of the resonant circuits are coupled together and primary windings of the transformers of each resonant circuit are coupled together.

The present disclosure relates to communicating fault event information between power supply devices. In an example, a fault event communication system can include a comparator that can be coupled to a node that can have a shared bus voltage established by current sharing circuitry. The comparator can compare the shared bus voltage to a reference voltage and output a fault alert signal based on the comparison to alert a respective power supply device that another power supply device is experiencing a fault event. The system can include logic circuitry that can initiate a timer for a time interval in response to receiving the fault alert signal. The logic circuitry can determine a type of fault event at the respective power supply device based on the fault alert signal and duration of time that has elapsed since initiating the timer.

A DC voltage converter arrangement includes a plurality of full switch bridges and transformers and is for a galvanically separate, at least indirect electrical coupling of a fuel cell unit to a traction network including a high-voltage battery. The plurality of full switch bridges and transformers transform a DC input voltage to an alternating voltage, transform the alternating voltage to a transformed alternating voltage, and transform the transformed alternating voltage to a DC output voltage. At least one of the full switch bridges is included in a resonance circuit including an inductance and a capacitor.

The present disclosure provides a high-performance power supply of a wide output voltage range and a control method thereof. The high-performance power supply of a wide output voltage range includes M rectification branches and a serial to parallel conversion module. The technical solution of the present disclosure solves the problem in the prior art that it is still difficult to obtain a good performance within a full output voltage range under a wide output voltage requirement.

A converter system for transferring power including a first converter unit, a second converter unit and a control unit. The first converter unit and the second converter unit are connected in parallel. The first converter unit is connected to a high voltage system via a first series switch unit and the second converter unit is connected to the high voltage system via a second series switch unit. The first converter unit is connected to a low voltage system via a third series switch unit and the second converter unit is connected to the low voltage system via a fourth series switch unit. The control unit is configured to disconnect the first series switch unit and high voltage system in case of a failure in the first converter unit or to disconnect the second series switch unit and high voltage system in case of a failure in the second converter unit.

Provided is a new LDC to satisfy the recent requirements for a bidirectional large-capacity isolated LDC (DC-DC converter). The present disclosure provides a new bidirectional isolated LDC, in which two converters with different power circuit topologies operate in parallel in order to enable both buck mode and boost mode. The two applied converters are a phase-shift full-bridge converter with full-bridge synchronous rectification and an active-clamp forward converter. According to the present invention, it is possible to achieve the advantages of both a phase-shifted full-bridge converter with full-bridge synchronous rectification applied and an active clamping forward converter. Thus, it is to possible to minimize output voltage and current ripples, thereby improving the quality of the LDC output power while minimizing electromagnetic waves generated while a product is operating.