Progress Introduction
The development and design of Single-Phase Double Conversion UPS System starts with designing each components in the system. The components included are:
- Single-Phase Controlled Full Wave Rectifier
- Buck Converter with PID controller
- Full-Bridge Inverter with Battery
After each component designed completely, it will be combined to produce a full circuit of UPS system. It is decisive to note that all parameters used during the design process are based on references.
*Note: The simulation was run for 1 second where the first half cycle is ON state of the ideal switch and OFF state during the next half cycle.
Project Progress from Week 1 - 5
Single-Phase Controlled Full Wave Rectifier
- It converts 240 VAC to 339 Vpeak.
- The firing angle used is 85 degrees.
The output waveform of rectifier:
Buck Converter with PID Controller
- Steps down DC input voltage to a lower DC output voltage.
- Few assumptions were made:
- Circuit is operating in steady state.
- Inductor current is continuous.
- Capacitor is very large and output voltage is held constant.
- All components in the buck converter are in ideal condition.
- The value of the inductor must be 10 times higher than the minimum inductance in order to reduce voltage and current ripple.
- The output ripple factor must not exceed 0.5%.
- Due to the output voltage of the buck converter is not achieved, thus a PID controller is used to adjust the output voltage to reduce the error.
- The table on the left is the parameters of buck converter while on the right is parameters used for PID controller.
Output voltage waveform of Buck converter with PID controller: