nadre25
Member level 3
We created a transformerless 220VAC to 220VDC as the DC rail of our IGBT inverters. We already have a working H-bridge. Our desired input is a 220V DC that has a logic that of a the PWM from the microcontroller.
If we connect our transformerless without the IGBT, the voltage output is 220V
when we connect it to the rail of our IGBTs the voltage is drained. It became 160V. When we varied the Duty Cycle the voltage also decreases or increases.
What we like to do is to have the same output of the PIC microcontroller which is a stable 5V even though the duty cycle is being varied, a 220VDC that is stable.
thanks.
If we connect our transformerless without the IGBT, the voltage output is 220V
when we connect it to the rail of our IGBTs the voltage is drained. It became 160V. When we varied the Duty Cycle the voltage also decreases or increases.
What we like to do is to have the same output of the PIC microcontroller which is a stable 5V even though the duty cycle is being varied, a 220VDC that is stable.
thanks.