Novel Synchronous Rectification Method for WPT Only by DC Current Sensor

To achieve high efficiency rectification, one option is to use synchronous rectification instead of diode rectification. However, synchronous rectification requires an expensive AC current sensor. This is one of the barriers when introducing synchronous rectification. Here we introduce a new synchronous rectification method that does not need any expensive AC current sensors. This new method just uses an DC current sensor, which is cheaper than AC current sensor. The principle of the method is explained in the first part, and the effect of the method is verified by experiments.