Electrical Engineering › Section Q · Thyristors, operational amplifiers, and power conversion › Topic Q.11
Pulse-width modulation, DC motor drives, inverters, and AC motor drives
Modern power electronics controls large amounts of power by switching transistors fully on and fully off thousands of times a second. Varying the width of those pulses sets the speed of a dc motor, and shaping them builds the ac that drives induction motors, solar inverters and electric vehicles.
In this topic
- Why switch instead of throttle?
- Pulse-width modulation
- Making and using PWM
- Worked example: linear against PWM
- DC motor drives
- The H-bridge
- Worked example: driving an H-bridge
- Inverters
- AC motor drives
- Worked example: inverter and drive settings
- Common mistakes to avoid
- Key takeaways
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