The document provides an overview of inverter circuits, including definitions, operation characteristics, and types of inverters such as single phase half and full bridge inverters. It discusses sinusoidal pulse width modulation techniques, specifically bipolar and unipolar switching. The learning outcomes emphasize students' ability to analyze and design DC to AC converters.

1. INVERTER
CIRCUITS
Hasan Abdulhadi Turki
MSC in electrical engineering
University of Baghdad

2. Overview
1. Definition of inverter
2. Sinusoidal pulse width modulation technique
3. Single phase half bridge inverter
4. Single phase full bridge inverter

3. Learning outcomes
At the end of the lecture, student should be able to:
1. State the operation and characteristics of Inverter.
2. Use different technique for analyzing and designing
of DC to AC Converter.

4. Introduction
• Inverters are circuits that converts dc input
voltage to a symmetric ac output voltage
by which both magnitude and frequency
can be controlled.
• Applications :
– adjustable speed ac motor drives,
uninterruptible power supplies (UPS),
and ac appliances run from an
automobile battery.

5. Circuit structure and output
waveform

6. Sinusoidal pulse width modulation
technique

7. Types of SPWM
1-Biploar switching

8. 2-Unipolar switching

10. Single phase half bridge inverter

11. Single phase half bridge inverter
S2
S1 S3
S4

12. Conclusion
• Definition of inverter, circuit structure and output waveform.
• Sinusoidal pulse width modulation technique and it’s types (Bipolar
switching and Unipolar Switching).
• Single phase half bridge inverter.
• Single phase full bridge inverter.

13. Reference
1- Muhammad H. Rashid, “Power Electronics, Circuits,
Derives and Applications”, Pearson Education Inc. 2004.