Power regulating circuit of non-contact type energy transmission system and control method thereof

Abstract

The invention discloses a power regulating circuit of a non-contact type energy transmission system, which comprises a pickup coil, a tuning capacitor and a load and is characterized in that the pickup coil is formed by connecting a fixed inductance and a variable inductance in series, wherein the access value of the variable inductance is controlled by a controller; an input end of the controller is provided with a zero passage detecting circuit and a sampling circuit; an output end of the controller is also provided with an isolating circuit and a driving circuit; and a control method of the controller comprises the following steps of: determining the access value of the variable inductance by comparing the sizes of sampling voltage values in the previous period and in the next period, and finally enabling a secondary pickup voltage to be stable at a fixed value or fluctuate between two values by circularly comparing a front periodic voltage and a back periodic voltage. The power regulating circuit has the obvious effects: the circuit has a simple structure, a control algorithm is easy to implement, the system has better dynamic response speed, stability and anti-interference performance, and the effective pickup of power can be ensured in a load changing process so as to realize the maximum energy transmission of the system.

Description

technical field [0001] The invention relates to a non-contact energy transmission technology, in particular, a power regulation circuit of a non-contact energy transmission system and a control method thereof. Background technique [0002] With the development of science and technology, non-contact energy transmission technology has been widely used, such as non-contact power supply of high-power electrical equipment, non-contact charging of low-power portable electronic devices, non-contact power supply of electrical equipment working in special environments, etc. . This technology has broad application prospects due to its advantages of no contact spark, no device wear, easy maintenance, good safety performance, low noise, and high degree of automation. [0003] Such as figure 1 As shown, the non-contact energy transmission system is mainly composed of a primary loop and a secondary loop, also called the primary loop and the secondary loop. Usually the primary circuit i...

AI Technical Summary

Problems solved by technology

However, there are some shortcomings in the above three methods

For the two methods of accessing the step-down chopper circuit and decoupling, if the power picked up by the secondary circuit is relatively low, and the load needs to output more power, no matter how the duty cycle is adjusted, the system’s The output power will never be able to increase

For the method of connecting the boost chopper circuit, when the secondary circuit voltage increases with the change of the load, the boost chopper circuit cannot achieve the purpose of reducing the voltage

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