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发明授权
CN107482786B 一种无线充电系统负载估计方法 有权

一种无线充电系统负载估计方法
摘要：
一种无线充电系统负载估计方法，包括：步骤A、检测整流桥输入电压与整流桥输入电感之前电压的上升沿过零点，获取上升沿过零点时间；步骤B、选取整流桥输入电压与整流桥输入电感之前电压在一个周期内相邻的上升沿过零点，求得上升沿过零点时间差；步骤C、获取无线充电系统工作频率，并测量整流桥输入电感值；步骤D、利用整流桥输入电压与整流桥输入电感之前电压的上升沿过零点时间差、无线充电系统工作频率和整流桥输入电感值，估计无线充电系统负载；步骤E、随机选取不同时长的多个时间段，对多个时间段内的无线充电系统负载估计结果进行统计处理，得到估计值。本发明可为负载变化情况下的无线充电系统状态辨识和控制策略的制定提供依据。
摘要（英）：

A wireless charging system load estimation method comprises the following steps: A, detecting voltage rising edge zero cross points before a rectifier bridge input voltage and a rectifier bridge input inductance, and obtaining a rising edge zero cross point time; B, selecting voltage adjacent rising edge zero cross points before the rectifier bridge input voltage and the rectifier bridge input inductance in a circle, and solving a rising edge zero cross point time difference; C, obtaining a wireless charging system work frequency, and measuring the rectifier bridge input inductance value; D, estimating the wireless charging system load according to the voltage rising edge zero cross point time difference before the rectifier bridge input voltage and rectifier bridge input inductance, the wireless charging system work frequency and the rectifier bridge input inductance value; E, randomly selecting a plurality of time slots of different durations, carrying out a statistics process on the wireless charging system load estimation results in the time slots, and obtaining an estimation value.

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