The invention discloses a method and device for measuring high-frequency electric parameters of a wireless electric energy transmission system of an electric vehicle, and the method comprises the steps: collecting the voltage and current of an incoming line of a primary induction coil in the wireless electric energy transmission system of the electric vehicle in a manner of parallel connection of divider resistors under the working condition of the system; wherein the value range of each divider resistor is that m is the number of the divider resistors, R1 is the resistance value of each divider resistor, and ZL is the inductive reactance of the primary induction coil of the wireless electric energy transmission system of the electric vehicle; carrying out high-frequency parameter decomposition on incoming line voltage and current of the primary induction coil, and solving fundamental wave and harmonic signal components; calculating the instantaneous power by using the fundamental wave and each harmonic component; and calculating electric energy by using the instantaneous power. The problems that in a traditional technical scheme, measurement cost is high, equation solving is complex, high-voltage measurement is difficult, and errors caused by harmonic waves and skin effects are large are solved.

    一种电动汽车无线电能传输系统高频电参量测量方法及装置,方法包括:在系统工作条件下,采用分压电阻并联的方式采集电动汽车无线电能传输系统中初级感应线圈的进线电压和电流;其中,单个分压电阻的取值范围为m为分压电阻个数,R1为每个分压电阻的阻值,ZL为电动汽车无线电能传输系统初级感应线圈的感抗;对初级感应线圈的进线电压和电流进行高频参量分解,求解基波及谐波信号分量;利用基波及各次谐波分量进行瞬时功率的计算;利用瞬时功率计算电能。解决了传统技术方案测量成本较高、方程求解复杂、高压测量困难以及谐波和趋肤效应带来的误差较大的问题。


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    Title :

    Method and device for measuring high-frequency electric parameters of wireless electric energy transmission system of electric vehicle


    Additional title:

    电动汽车无线电能传输系统高频电参量测量方法及装置


    Contributors:
    CHEN MINGMING (author) / BAO JIN (author) / LI ZHIXIN (author) / LU SHUFENG (author) / LI JUN (author) / WANG SIYUN (author) / MU XIAOXING (author) / YI YONGXIAN (author) / XIA GUOFANG (author) / GONG DAN (author)

    Publication date :

    2023-05-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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