Solid state high frequency induction heating equipment's characteristics as following: 1. Using high power MOSFET. 2.Using dual-loop PI regulator of voltage and current, the power range is adjusted from 0-100%. 3.Using pulse width modulation or voltage regulation circuit microcomputer control based,adjustment stable with high precision, small harmonic interference. 4.It has fault protection system with over-voltage,over-current,lack phase and less water- pressure etc..