2006-12-17 13:18:23 · 3 answers · asked by jane 1 in Science & Mathematics ➔ Engineering
Reduce the voltage.
2006-12-17 13:24:18 · answer #1 · answered by Vincent G 7 · 1⤊ 0⤋
To make a DC motor run slower, you reduce the voltage going to it.
You can do this at least 3 ways.
1. Reduce the voltage at the source - change your power supply.
2. Insert a series resistance to drop some of the voltage. This tends to be very inefficient, and usually generates significant heat if your motor is very big.
3. Pulse Width Modulate the voltage (turn it on and off very rapidly). As you lower the duty cycle (the on time versus the off time) then the average voltage delivered to the motor is lower, and it will run slower. This method can be much more efficient than #2.
2006-12-18 00:11:53 · answer #2 · answered by I don't think so 5 · 2⤊ 0⤋
You could do one of two things.
1. Add external resistance in series with your motor. Resistance could be an additonal resistor or another motor.
2. Reduce the voltage
2006-12-17 22:04:21 · answer #3 · answered by Booj 1 · 0⤊ 0⤋