Frequency Tracking Control Of Magnetic Resonance Wireless Power Transmission System Based On Integral Sliding Mode Variable Structure

Wireless charging technology is one of the most market-oriented research directions now,and has very broad prospects in the fields of automobiles,medical treatment,electronic equipment and so on.Therefore,the research on the control method of wireless charging technology has high practical significance.This paper takes the magnetic resonance wireless power transmission system as the research object,establishes a two-coil magnetic resonance wireless power transmission system model,analyzes the system transmission efficiency from the perspective of circuit coupling theory,and then designs the corresponding integral sliding mode variable structure control method.To achieve fast and stable frequency tracking control,the specific work is as follows:1.Introduce the basic composition and topology of the magnetic resonance wireless power transmission system,establish a simplified circuit model of the magnetic resonance wireless power transmission system,and use the circuit mutual inductance theory and Thevenin's theorem to derive the system frequency,transmission efficiency and power equations.2.The frequency splitting phenomenon in the magnetic resonance wireless power transmission system is analyzed,the system power is optimized,and the impedance matching technology is used to achieve the desired frequency tracking of the system,which provides a theoretical basis for achieving high-speed and efficient control later.3.For the traditional control method of magnetic resonance wireless power transmission system,there is a problem of large chattering,and a sliding mode variable structure control algorithm based on integration is proposed.By integrating the error,this method simulates the imperfect realization of the high-frequency switch to cause system chattering at the control response,eliminates the problems caused by parameter uncertainty,and improves the performance of the controller and the overall performance of the control system.Finally,the effectiveness of the control method in this paper is verified through simulation,the effect of eliminating system chattering is significant,and the overall performance of the system is improved.4.In view of the large external interference and modeling errors in the model of magnetic resonance wireless power transmission system,this paper proposes a new adaptive integral sliding mode variable structure control method based on RBF neural network.Using RBF neural network adaptive tracking system modeling error,combining single neural network modeling with integral sliding mode control,the online self-tuning of integral sliding mode controller is completed,which can further offset the observation error and the approximation error.The magnetic resonance wireless power transmission system expects frequency tracking control.The simulation verifies that the control algorithm has better anti-interference ability and control accuracy,and enhances the system robustness.