3 phase inverter basics

The video tutorial explains the process of converting a rectified 3-phase AC supply into a ripple DC waveform using diodes and capacitors. It then details how to use a three-phase inverter with IGBTs to convert the DC into a three-phase AC supply. The tutorial covers the switching sequence required to simulate the three phases and discusses the use of pulse width modulation to refine the AC output. The video concludes with a summary of the process and thanks the viewers.

What is the purpose of using diodes in the conversion of AC to DC?

• To increase the voltage

• To prevent electrons from flowing backwards

• To decrease the current

• To change the frequency

How many IGBTs are used in the inverter to convert DC to three-phase AC?

• Five

• Seven

• Four

• Six

What is the result of closing switches one and six in the inverter circuit?

• Phase three to phase one

• Phase two to phase three

• Phase one to phase two

• Phase one to phase three

What is the main purpose of pulse width modulation in this context?

• To increase the power output

• To create a sinusoidal waveform

• To reduce the voltage

• To stabilize the current

What role does the controller play in the pulse width modulation process?

• It stabilizes the current

• It rapidly opens and closes switches

• It decreases the frequency

• It increases the voltage