How do you test for a short DC motor?
You must be able to freely move the motor shaft (rotor) to thoroughly conduct the motor tests. Attach the alligator clip leads to each of the motor power input wires. Turn on the volt ohmmeter and switch it to the “Ohms” setting. Touch the lead ends together and the meter should read a direct short or zero ohms.
How can you tell if a DC motor is bad?
Touch the leads of the meter to the two motor leads. The meter should read a low resistance in the area from 10 to 30 ohms. If the meter reads an infinite ohms reading or an open circuit, rotate the end shaft of the motor. The meter should give various ohm readings as the motor shaft is rotated.
How do you test a DC motor with a multimeter?
Check to make sure the DC motor’s rotor can turn with no impediments. Switch the voltmeter to “Ohms”. Attach one end of the red lead wires to the DC motor and run the DC motor’s red wire to the battery. Attach the clip of the black lead wire to the DC motor and run the black motor wire to the battery.
How do you find the resistance of a DC motor?
For the winding resistance use an ohmmeter. For a dc motor measure the resistance between the 2 armature wires. If it is a WYE connected BLDC motor, the resistance is the line-to-line resistance. Thus divide the resistance(l-l) by 2 to get the phase resistance.