Class 11 : Converter Design - PWM Signal generation
- In electrical engineering, all power control happens through MOSFET, IGBT, transistor or any switching device.
- By controlling the ON/OFF period of the switching device we should able to control power flow from the input to the output side load.
- DC-DC converter and AC-DC / DC- AC converters using the switching devices for the power conversion.
- Using the FPGA we should able to control the power converters in open loop and closed loop mode.
- In the given DC-DC converter Close loop control is implemented.
- Output voltage and current is monitored and controlled through PID control.
- PID control adjust the duty (ON/OFF) of the PWM signal to control the desired output voltage and current.
- PWM + PID control can be implemented inside the FPGA.
- PWM - Pulse Width Modulation.
- One cycle of PWM signal having one ON and OFF time period.
- ON (High Period) called as Duty. ON + OFF time called as period.
- Duty cycle define how much percentage of PWM having ON time.
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