No you can’t use a dimmer switch to control a DC motor. A dimmer uses diac and triac and only works with AC which commutates the triac OFF at the end of every half cycle.
Can you use a dimmer switch to control motor speed?
Dimmer Switch for Fan Speed
The best dimmers for running an electric motor have an adjustable minimum speed setting. … Always buy a switch that is rated to handle an equal amount for the watts or more, not less, in order for the dimmer switch to work well. A dimmer motor AC switch is suitable for a ceiling fan.
Can you use a light dimmer to control fan speed?
Standard dimmer switches should never be used to control the fan motor on a ceiling fan because the dimmer could damage the fan motor, or overheat and start a fire. … You can actually purchase a device that will do this – it consists of a wireless remote and a receiver that gets wired directly in to the fan.
How do I reduce the speed of an electric motor?
So, if you want to decrease speed, decrease voltage. If you want to decrease torque, decrease current. If you increase torque (say by putting a brake on the motor), you are increasing motor torque. But if you don’t change the supply of electrical power, then the mechanical power also won’t change.
Which dimmer used in electric motor?
Re: Dimmers on AC & DC motors
Dimmer switches are based on triacs. A triac is basically two silicon controlled rectifiers hooked in parallel, but with their current flows in opposite directions so that they will pass AC when working together.
How do you slow down a 120vac motor?
Some AC motors slow down by decreasing the frequency of the AC.
Speed of Single phase motor can be controlled in different ways:
- Reducing voltage will reduce the speed within a range. Fan speeds are controlled this way.
- Change number of poles by altering winding connections.
- Change frequency of supply.
How do you slow down an AC motor?
If it’s a small fan motor or even a ceiling fan, this is often done by reducing voltage to the motor with a solid state control or a series inductance. This just increases the slip speed. A large AC motor can be slowed down with a Variable Frequency Drive.
Can you put a dimmer switch on an exhaust fan?
With regard to the OP, you can use a dimmer with a fan as long as you use it on the switched input of a timer fan. The fan takes its power from the permanent live, with the switched input just telling the electronics to activate the timer.
Can you put a dimmer switch on any light?
A dimmer switch can be installed anywhere that an existing on or off switch is in place. Replacing the current toggle switch with a dimmer switch will allow you to change the lights’ brightness, so long as you are using a light bulb that is compatible with the dimmer you have chosen.
Can I put a variable speed control on any motor?
No. Some motors cannot change their speed at all – steppers, induction motors and synchronous motors. Some motors require different speed control techniques – brushless DC, and many others.
How do you slow down a brushless AC motor?
As I understand it, given that it is a brushless AC motor, the only way to slow it down to a calculated speed is to rapidly turn it off/on with use of a 555 IC.