Zero-current and low-voltage switching inverter-type welding cutting power supply circuit

• Main Authors: CHEN BIAO, WU YUETAO, YANG ZHENWEN
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2012
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention relates to a zero-current and low-voltage switching inverter-type welding cutting power supply circuit. The inverter-type welding cutting power supply circuit mainly comprises a DC (direct current) bus filter circuit for filtering the input DC voltage, a PWM (pulse width modulation) inverter circuit for transforming the filtered DC voltage into a low AC (alternating current) voltage, a rectifier circuit for rectifying the low AC voltage, and a control circuit for subjecting the PWM inverter circuit to signal control, wherein the PWM inverter circuit receives a drive pulse signal of the control circuit, so that a linear inductor arranged on the primary side of a transformer is used to suppress the current rise rate of a switching device on the PWM inverter circuit to make the switching device in the zero-current switching state when the switching device is in an on state and a passive buffer circuit in parallel connection with the switching device is used to slow down the voltage rise rate of the