Electrical Engineering › Section Z · AC motors › Topic Z.4
Polyphase, wound-rotor, and single-phase induction motors
The induction motor has no brushes, no magnets and no electrical connection to its rotor, yet it drives most of the world's pumps, fans and machines. Its secret is a rotating field and a rotor that always runs a little behind it.
In this topic
- Industry's workhorse
- The rotating magnetic field
- Torque from slip
- Worked example: slip and power flow
- The torque-speed curve
- Power factor, efficiency and generating
- Starting and speed control
- Worked example: starting and drive settings
- Wound-rotor motors
- Single-phase induction motors
- Common mistakes to avoid
- Key takeaways
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