System for achieving dynamic wireless constant power charging and control method for system

Abstract

The invention provides a system for achieving dynamic wireless constant power charging and a control method for the system. The system comprises an energy transmitting module, an energy receiving module and a constant power tracking control module, wherein the energy transmitting module is used for converting a primary direct current power supply into high-frequency alternating current electrical energy and transmitting the high-frequency alternating current electrical energy in a high-frequency magnetic field coupling manner; the energy receiving module is used for receiving electrical energy and supplying the electrical energy to a load; the constant power tracking control module is used for obtaining a reference control signal according to charging current collected in real time, and adjusting voltage of a rectifying port into a reference control signal to achieve a constant power tracking control. With direct current output by a DC/DC converter at a secondary side as feedback quantity, direct current voltage of an uncontrollable rectifier terminal is disturbed by a perturbation and observation method-based constant power tracking control method; and a transmission voltage gain from the primary side to the secondary side always works on a voltage gain point corresponding to a transmission power extreme point, so that the condition that the system transmits the electrical energy at constant power is ensured, and the output power is kept stable.

Description

technical field [0001] The invention belongs to the technical field of wireless energy transmission, relates to a system and a control method for realizing dynamic wireless constant power charging, and is suitable for dynamic wireless charging applications of electric vehicles. Background technique [0002] In recent years, wireless power transmission technology (Wireless Power Transmission, WPT) has achieved rapid development, especially the wireless power transmission technology in the form of magnetic coupling. This method transfers energy through high-frequency alternating magnetic field coupling between power transceiver coils. Magnetic coupling wireless power transmission technology has been successfully applied in low-power portable electronic devices, such as mobile phones and cardiac pacemakers. Another important application of magnetic coupling wireless power transmission technology is to wirelessly charge electric vehicles (Electric Vehicle, EV). With the furthe...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of the prior art, the purpose of the present invention is to provide a system for realizing dynamic wireless constant power charging, which aims to solve the problem of power transmission in dynamic wireless charging caused by insufficient quick response to dynamic offset in the prior art. volatility problem

Images