HIGH-EFFICIENCY ELECTRICAL ENERGY TRANSMITTING END AND WIRELESS ELECTRICAL ENERGY TRANSMISSION DEVICE

摘要

A high-efficiency electrical energy transmitting end and a wireless electrical energy transmission device are provided. A soft-switching control circuit controls the voltage waveform between two ends of a switching device of an inverter circuit. During disconnection of the switching device, a voltage waveform between the drain electrode and the source electrode is a waveform in the form of a fundamental wave superimposed with a third harmonic, enabling the switching device to be turned on at zero voltage to decrease the switching loss. Through a current regulation circuit, the primary transmitting current is controlled to have constant frequency and constant amplitude to ensure that the primary transmitting energy won't be affected by the changes of the coupling and load and to enhance the transmission efficiency. The transmission efficiency of the wireless electrical energy transmission device of the present invention is high and the reliability is better.

主权项

1. A high-efficiency electrical energy transmitting end, used for transmitting energy to a spaced electrical receiving end, comprising an inverter circuit, a soft-switching control circuit, and a primary transmitting part;
the inverter circuit receiving a direct current input power supply to output alternating voltage with a preset frequency; the soft-switching control circuit being connected between the direct current input power supply and the inverter circuit for controlling voltage between two power ends of a switching device of the inverter circuit; the primary transmitting part comprising a primary transmitting coil, the primary transmitting coil being used for receiving the alternating voltage to generate an alternating magnetic field to transmit energy to the electrical energy receiving end; wherein the soft-switching control circuit controls the voltage between the two power ends of the switching device of the invertor circuit, during disconnection of the switching device, a voltage waveform between the two power ends of the switching device is a waveform in the form a fundamental wave superimposed with a third harmonic, such that when the switching device is connected, the voltage between the two power ends of the switching device is lowered to zero.