Non-contact electric energy transmission system based on Z-source inverter and phase-shifted control method of transmission system

Abstract

The invention discloses a non-contact electric energy transmission system based on a Z-source inverter and a phase-shifted control method of the transmission system. A circuit is divided into two parts of transmitting and receiving by taking a coupler as the boundary, wherein, the transmitting part comprises an input direct-current power supply, an impedance source network, an inverter circuit and an induction coupler primary winding; for preventing the current backflow, a diode is necessary to be connected behind the voltage source in series; the receiving part comprises an induction coupler vice-side winding and a rectification filter circuit. In the system, the transmission power and the load voltage of the system can be reduced by setting the phase-shifted angle in a drive pulse; and meanwhile, the transmission power and the load voltage of the system can be increased by increasing the straight-in time in the phase-shifted angle, thus realizing the bidirectional adjustment of the transmission power and the load voltage. According to the invention, the problem that the load can not operate at the rated condition because of factors such as load change and the like in the non-contact electric energy transmission system can be solved, and the practical progress of the non-contact electric energy transmission technique is promoted.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a non-contact power transmission system, in particular to a phase-shift control method for a non-contact power transmission system based on an impedance source inverter. Background technique [0002] So far, the main circuit topologies of contactless power transfer systems are mainly voltage source inverters and current source inverters, and there has been no research on contactless power transfer systems based on impedance source inverters. In addition, during the working process of the non-contact power transmission system, due to factors such as load changes, the input power of the system and the load voltage will change, so that the load cannot work at the rated state, resulting in waste of resources. Research on this aspect at home and abroad is also very important. few. Contents of the invention [0003] The technical problem to be solved by the present invention ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a non-contact power transmission system based on an impedance source inverter and its phase-shift control method, to realize the two-way adjustment of transmission power and load voltage of the non-contact power transmission system, and to solve the problem of non-contact power transmission. The problem that the load cannot work in the rated state due to factors such as load changes in the system

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