| 摘要 |
-21 1 A method and apparatus for providing welding-type power includes an 2 input circuit, a power circuit, and a controller. The input circuit receives input power and 3 provides intermediate power. The power circuit has a power control input with at least 4 one switch that responds to the control input. The power circuit receives the intermediate 5 power and provides welding type output power. The controller has a set point input and a 6 control output. The control output is connected to the power control input. The control 7 circuit also includes a pwm module that responds to the user set point input and provided 8 the control output. The pwm module can include a short duty cycle linearizing module. 9 The pwm module can also include a short duty cycle charging ramp module. *DN*G:/CLF/ITW/66070/66070application1.wpd Friday, July 17, 2015 10:11AM |
