Speed Control Basics: VFD or Triac for AC Induction Motors?

When a voltage is applied to an AC induction motor, it runs at a certain speed.  Variable speed requirements for AC induction motors are typically fulfilled by a 3-phase motor and an inverter or VFD.  This blog post also introduces another option.

Speed Control Basics: VFD or Triac for AC Induction Motors?

3 Phase Induction Motor Speed Controller Circuit

Speed Control Basics: VFD or Triac for AC Induction Motors?

Speed Control Basics: VFD or Triac for AC Induction Motors?

Triac Universal Motor Speed Control Circuit Design Basics - Technical Articles

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Triac Universal Motor Speed Control Circuit Design Basics - Technical Articles

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PDF) Speed Control of Three Phase Induction Motor using Variable Frequency Derive Control System