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AC induction motor speed control?
I want a speed control for an AC induction motor on a bench grinder. I can't find anything commercially available.
I can build it if I can find the schematic.
120V AC 3-4 amps 1 phase motor with starter cap.
4 wires into motor - 2 for cap, 2 for power.
there is also one tap to power 2 12volt bulbs.
THE key word is INDUCTION motor.
Drill motors = brush motors NOT= induction motor.
2 Answers
- Anonymous1 decade agoFavorite Answer
Try this schematic: http://www.aaroncake.net/circuits/acmotcon.asp
or this one: http://home.maine.rr.com/randylinscott/aug99.htm
added: Sorry about that.
- 5 years ago
Question 1: you can get this information from any text book with pages of explanation. Capacitor...current is 90 degree advancing than voltage. Coil....is opposite than capacitor. Question 2: It just series with two more chokes. Adding one choke,lesser current go to the motor (choke ressist AC current).....middle speed. Adding two chokes .......slow speed. No choke is added....full speed or High.
