Method for determining constant voltage compensation network topology of wireless power transmission system

Abstract

The invention relates to a method for determining the constant voltage compensation network topology of a wireless power transmission system. According to the compensation network, the output voltage of the wireless power transmission system is not affected by load, and not limited by a non-contact transformer parameter, and thereby the design of the non-contact transformer can be simplified. According to the method, the compensation circuit parameter is determined with the aim that the voltage gain of the system is not affected by the system, the input impedance of the system is pure resistive, and the system efficiency is maximal, then the constant voltage compensation network topology is determined, and the constant voltage compensation network topology of which four groups of primary and secondary resonant networks can all be equivalent to T-type or n-type networks. The output voltage of the IPT system is not limited by the parameter of the non-contact transformer, and the design of the non-contact transformer is simplified; and the constant voltage output and unit power factor which are not affected by the load can be achieved at the same time, the reactive power is reduced, the requirement on device stress is lowered, and the transmission efficiency is improved.

Description

technical field [0001] The invention discloses a method for determining the topology of a constant voltage compensation network of a wireless power transmission system, which is suitable for wireless charging occasions and belongs to the technical field of wireless power transmission. Background technique [0002] Inductive Power Transfer (IPT) technology uses an alternating electromagnetic field as a medium to transmit energy to a load. Since there is no direct electrical contact, it can avoid electric sparks, is not affected by the environment, and can work in harsh environments. At present, IPT technology has been widely used in consumer electronics, lighting, electric vehicles and other fields. [0003] In order to transmit active energy efficiently, the IPT converter needs to have the following characteristics: 1. Zero reactive power, 2. Soft switching of switching devices, 3. Directly output the voltage or current required by the load. There is no reactive energy in ...

AI Technical Summary

Problems solved by technology

However, the output constant voltage and constant current of the above structure are affected by the parameters of the non-contact transformer. The parameters of the non-contact transformer are limited by space and distance, and the design is complicated. Under the limited space and distance, the transformer parameters may be difficult to meet. Constant voltage or constant current requirements

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