26 Inverters | Power Electronics

The lecture covers the operation of inverters, focusing on switching mechanisms using MOSFETs and IGBTs. It explains the conversion of DC to AC, the role of resistive and inductive loads, and the challenges posed by inductive loads. The lecture also introduces PWM techniques, including bipolar and unipolar methods, to reduce harmonics and achieve sinusoidal waveforms. The importance of filtering to manage harmonics is discussed, highlighting the benefits of using high-frequency PWM signals.

What is the primary function of an inverter?

What considerations must be taken into account when designing an inverter for a resistive load?

Explain the difference between MOSFETs and IGBTs in the context of inverters.

Describe the process of switching in an inverter and its effect on output voltage.

What challenges arise when using inductive loads with inverters?

How does the switching sequence of Q1, Q2, Q3, and Q4 affect the current flow in an inverter?

Discuss the impact of harmonics on the performance of inverters.

What is the purpose of using PWM in inverter design?

Explain the difference between bipolar and unipolar PWM techniques.

How can filtering techniques improve the output of an inverter?