We have a table top machine and its motor is rated 110V, 60Hz and 750W. Someone said it is possible to use a dimmer switch to achieve different motor speed. Is it ok to connect the machine to a dimmer switch?
Thanks. Ken
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2007-08-17 13:53:34 · 7 answers · asked by Anonymous in Home & Garden ➔ Do It Yourself (DIY)
If the motor on that machine is an induction motor, then you can't control its speed... period. Induction motors are rated to run at specific RPM ratings. If you attempt to run them slower, they overheat and burn up.
If your machine has a brush-type motor, then you can buy a proper controller for that from an electrical supply house.
The best variable speed motor is a DC motor and a DC motor controller. You can run a DC motor from dead stop to full rpm or anywhere inbetween just by rotating a dial and if you want it to reverse, then it will do that too with the right controller. The transition from one speed to another is smooth and controlled. Treadmills use DC motors to power them.
2007-08-17 16:31:47 · answer #1 · answered by James P 3 · 0⤊ 0⤋
If you're talking about the typical light dimmer, they're not designed to carry the current load of a motor. A fan speed controller, sold at most home centers, would be a better selection. However if it's a heavy duty motor you'll need a commercial controller.
2016-05-21 23:38:02 · answer #2 · answered by gayle 3 · 0⤊ 0⤋
A standard dimmer switch will not work. You need to find one that is rated for motors, like a ceiling fan switch. A standard dimmer switch will damage the motor.
2007-08-17 13:58:56 · answer #3 · answered by Kahless 7 · 2⤊ 0⤋
NO!!!
You need a motor-rated speed control switch...A dimmer/rheostat will almost always fail under an inductive load, such as a motor..
2007-08-17 14:00:00 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It'll probably be OK right up to the point when you apply power. Cheap dimmers are rated for a resistive load, and usually a reactive load like a motor will destroy it pretty quickly.
2007-08-17 13:59:08 · answer #5 · answered by steve.c_50 6 · 0⤊ 1⤋
NO! Two reasons:
Look at the power draw (750W) that's roughly 7 Amps.
Dimmer switches are typically rated for lights (100W).
Motors also produce back EMF, from magnetic fields.
This is typically 300Volts, & will blow any dimmer circuit.
2007-08-17 14:02:52 · answer #6 · answered by Robert S 7 · 0⤊ 1⤋
hay y'all watch this boom and there you have it here is your sign
2007-08-17 14:40:03 · answer #7 · answered by triminman 5 · 0⤊ 1⤋