초록 ▼

A method and apparatus for providing welding type power is disclosed. The power source is capable of receiving any input voltage over a wide range of input voltages and includes an input rectifier that rectifies the ac input into a dc signal. A dc voltage stage converts the dc signal to a desired dc

A method and apparatus for providing welding type power is disclosed. The power source is capable of receiving any input voltage over a wide range of input voltages and includes an input rectifier that rectifies the ac input into a dc signal. A dc voltage stage converts the dc signal to a desired dc voltage and an inverter inverts the dc signal into a second ac signal. An output transformer receives the second ac signal and provides a third ac signal that has a current magnitude suitable for welding, cutting or induction heating. The welding type current may be rectified and smoothed by an output inductor and an output rectifier. A controller provides control signals to the inverter and a controller power supply can also receive a range of input voltages and provide a control power signal to the controller, and a voltage independent of the input voltage.

대표청구항 ▼

[ What is claimed is:] [1.]1. A welding type power source capable of receiving a range of input voltages and frequencies, comprising:an input circuit configured to receive an input power signal having an input frequency and an input magnitude and provide a first signal having a magnitude responsive

[ What is claimed is:] [1.]1. A welding type power source capable of receiving a range of input voltages and frequencies, comprising:an input circuit configured to receive an input power signal having an input frequency and an input magnitude and provide a first signal having a magnitude responsive to the input magnitude;a preregulator configured to receive the first signal and provide a dc second signal having a preregulator magnitude independent of the input magnitude;an output circuit configured to receive the dc second signal and provide a welding type output power signal having an output frequency independent of the input frequency and having an output voltage independent of the input voltage;a preregulator controller, connected to the preregulator, and further having a controller power input; anda control power circuit configured to receive the dc second signal and provide a control power signal to the controller power input, wherein the controller power signal has a control power magnitude independent of the input magnitude and a control frequency independent of the input frequency.