Wireless electric energy transmission compensation topological structure with double parallel inductors

Abstract

The invention discloses a wireless electric energy transmission compensation topological structure with double parallel inductors, and the structure comprises a direct-current power supply, an inverter circuit, a primary side compensation circuit, a transformer, a secondary side compensation circuit, a rectifying circuit and a load; the primary side compensation circuit is connected with the alternating-current side of the inverter circuit and is provided with two branches; one branch is formed by connecting a primary side compensation capacitor and a primary side transmitting coil in series, the other branch is formed by connecting a parallel compensation inductor or connecting the parallel compensation inductor and a blocking capacitor in series, the secondary side compensation circuit is connected with the alternating current side of the rectifying circuit and has two symmetrical branches, one branch is formed by connecting a secondary side compensation capacitor and a secondary side receiving coil in series, and the other branch is a parallel compensation inductor. According to the wireless electric energy transmission compensation topological structure of the parallel inductors, through design of compensation parameters and frequency control, reactive power of the input side of the compensation circuit can be eliminated under a constant-voltage load, the anti-offset capability is high, the capability of adjusting the output power in a large range is achieved, and soft switching of an inverter is achieved.

Description

technical field [0001] The invention relates to the field of wireless power transmission, in particular to a wireless power transmission compensation topology structure of double parallel inductors. Background technique [0002] Wireless power transmission technology can transfer energy without contact, and has outstanding advantages such as convenience and safety, low maintenance cost, and adaptability to bad weather. The inductive wireless power transfer technology uses a loosely coupled transformer composed of two coils to transmit electric energy through electromagnetic coupling. Since the loosely coupled transformer has a large leakage inductance, it is often necessary to add a compensation network between the primary and secondary coils and the converter to reduce The reactive power of the circuit improves the power factor of the AC side of the inverter circuit, thereby improving the efficiency. [0003] The current common compensation methods in wireless power transm...

AI Technical Summary

Problems solved by technology

Although this method improves the offset fault tolerance and realizes a wide load range, the power factor of the AC side of the inverter decreases, the input impedance angle becomes larger, and a large amount of reactive power is introduced into the input side of the compensation circuit.

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