SIC INVERTED PLASMA CUTTING POWER SUPPLY

摘要

The present invention provides an SiC inverted plasma cutting power supply, which is characterized in that: the SiC inverted plasma cutting power supply comprises a main circuit and a closed-loop control circuit; the main circuit comprises a sequentially connected noise suppression module, a power-frequency rectification and filtering module, an SiC inverter module, a power transformer, an SiC rectification and smoothing module and a non-contact arc initiation module, wherein the noise suppression module is connected to an alternating-current input power supply, and the SiC rectification and smoothing module and the non-contact arc initiation module are respectively connected to a load; the closed-loop control circuit comprises a man-machine interaction module, a DSC controller, a failure diagnosis and protection module, an SiC high-frequency drive module and a load electrical signal detection module. The power supply has high inverting frequency, small size, light weight, lower raw material consumption, high energy efficiency, an obvious energy saving effect and excellent dynamic characteristics, and can be applied on both a low-power occasion and medium and high power cutting occasions in a stable and reliable manner.