Method and Apparatus For Providing Welding Type Power With Balanced Bus

摘要

A welding-type power supply includes a controller, bus (that can, but need not be preregulated), and an output converter. The controller has a preregulator control output and an output converter control output. The controller may receive bus feedback indicative of a plurality of bus voltages. A bus voltage balancing module in the converter includes a scaled correction module responsive to the bus feedback signal, and the converter control output is responsive to the bus voltage balancing module. The controller may receive load feedback indicative of a load output, have a bus voltage balancing module that includes a load proportional gain module responsive to the load.

主权项

1. A welding-type power supply comprising:
a bus; an output converter, disposed to receive the bus and to provide a welding type power output, and having a control input, wherein switches in the output converter are controlled by the control input; and a controller that receives a bus feedback signal indicative of a plurality of bus voltages, and wherein the controller has a converter control output connected to the control input, and wherein the controller has a bus voltage balancing module that includes a scaled correction module responsive to the bus feedback signal, and wherein the converter control output is responsive to the bus voltage balancing module.