Micro-arc oxidation special power supplies are a type of special power supply that utilizes micro-arc oxidation technology. In general, the theory of electrical breakdown has gone through different stages of development, including ionic current mechanism, thermal action mechanism, mechanical action mechanism, and electronic avalanche mechanism. The power supply mainly consists of the following components: three-phase rectification circuit, chopper power control circuit, IGBT inverter circuit, sensor collection circuit, A/D conversion circuit, driver interface circuit, protection circuit, and control and keyboard display circuit.