METHOD AND APPARATUS FOR RECEIVING A UNIVERSAL 3 PHASE INPUT for welding machine.
United States Patent Application 12/505,505
Filed July 19, 2009
Inventors: Jose ThomasThis patent deals with wide input 3 phase welding machine power source. Since welding manufacturers are not able to use boost chopper at the input end to have unity power factor. This method achieves unity power factor as well as can be used at wide input voltage range.
Patent pending on Power supply (forward converter.