Freewheeling current conduction in welding power supply

摘要

A power circuit for a welding power supply includes a rectifier circuit and a control circuit. The rectifier circuit includes a plurality of switches (e.g., silicon-controlled rectifiers). The control circuit is configured to provide a first control signal to a first switch at a predetermined firing angle to provide welding power through the first switch. The control circuit is configured to provide a second control signal to a second switch to allow freewheeling current to flow through the second switch.