Wireless charge control method based on coordination control over voltage and frequency of power supply

Abstract

The invention discloses a wireless charge control method based on coordination control over the voltage and the frequency of a power supply. The wireless charge control method mainly aims to meet the requirement for wireless charge power stability of an electric vehicle. A system mainly comprises the power supply, a transmitting device, a receiving device, a rectification and conversion device, a storage battery, a wireless transmitting and receiving module and a power tracking controller, wherein the frequency and voltage of the power supply are adjustable. According to the wireless charge control method based on the coordination control over the voltage and the frequency of the power supply, the resonant coupling type wireless electric energy transmission technology is adopted, the terminal voltage and the charge current of the storage battery serve as feedback, and constant-power or constant-voltage charge of the storage battery of the electric vehicle is realized through dual-ring coordination control over the power supply frequency and supply voltage. According to the wireless charge control method based on the coordination control over the voltage and the frequency of the power supply, the wireless charge power stability of the electric vehicle is effectively realized by the adoption of a control algorithm based on parameter feedback and double-variant coordination control, and the robustness of the system in operation is improved.

Description

technical field [0001] The invention belongs to the field of electric vehicles and automatic control, and relates to a wireless charging control method for electric vehicles. Background technique [0002] With the continuous maturity of wireless power transmission technology, especially the continuous development of wireless charging technology based on the principle of resonant magnetic coupling, it has brought great opportunities to the development and improvement of electric vehicle wireless charging system. Although the resonant coupled wireless power transmission technology can theoretically achieve high power transmission within a certain distance and frequency range, there are already basic conditions for application to electric vehicle charging, but with the time-varying load of electric vehicle batteries Access to the wireless power transfer system will have a certain impact on the normal operation and power transmission of the system. At present, the wireless char...

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Problems solved by technology

Although the resonant coupled wireless power transmission technology can theoretically achieve high power transmission within a certain distance and frequency range, there are already basic conditions for application to electric vehicle charging, but with the time-varying load of electric vehicle batteries Access to the wireless power transmission system will have a certain impact on the normal operation and power transmission of the system

At present, the wireless charging system of electric vehicles generally adopts the frequency tracking technology of the transmitting circuit to keep the system in the resonant state of the system to maintain efficient power transmission, but this control scheme has higher requirements on the frequency control accuracy of the power supply and the real-time performance of data acquisition. , the stability and robustness of the system are not very high

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