High-power non-contact charging system main circuit fault detection device

The invention discloses a high-power non-contact charging system main circuit fault detection device which is applied to an electric automobile non-contact charging system. The detection device detects a system main circuit and the centering condition of a primary coil and a secondary coil before charging. The non-contact charging power of an electric automobile is high, and the voltage and the current of the main circuit are high, so that the faults such as disconnection and short circuit of components and parts on the main circuit may cause overvoltage and overcurrent of other components and parts and lead to breakdown of the whole system. In addition, whether the primary coil and the secondary coil are centered in the non-contact charging system exerts a tremendous influence on the charging efficiency. By means of a testing method that a contact group is externally connected with a low voltage power supply and a test resistor, the two problems are solved, and the device provides forceful guarantee for high