How to Troubleshoot Single Phase Motors

Single-phase motor
••• www.motorandcontrol.com/worldw3.jpg

Single-phase motors are found in a long and diverse list of devices like washing machines, mechanical clocks and generators. if you experience a problem with your single-phase motor, a few simple troubleshooting steps can help define whether the problem lies in the motor or with some other part of your device.

    Disconnect the power source from the motor. Check that there the shaft is not stuck and that there are no signs of burning. Check any switches or starting mechanism. Replace any user-serviceable parts.

    Reset the thermal switch on the motor if there are no visible signs of damage. After the motor has cooled, start it again. If the motor fails to start, check the integrity of the wiring from the power source to the motor. If the wiring is intact, use your voltmeter to test the voltage of the motor; the voltage may not be exactly matched to the manufacturer's specified voltage, but it should be close. If the voltage is off by a substantial amount, you will need to replace the motor.

    Turn the motor off if the voltage is correct. Switch any starting devices on the motor to the "off" position and turn the power off. Disconnect the power wires to the motor and use your ohmmeter on the terminals where the wires were connected. Readings of zero indicate a short, and readings of infinity indicate that there is no resistance in the motor and the circuit is unimpeded. In either case, there are no user-serviceable parts to remedy the problem and you will need to replace the motor.

    Things You'll Need

    • Voltmeter
    • Ohmmeter

    Warnings

    • Always be sure that the power is off before testing the motor.

Related Articles

How to Test DC Motors
How to Calculate Motor Inrush Current
How to Detect a Faulty Solenoid
How to Test Resistors in a Circuit
How to Test a Ski Doo Ignition Coil
How to Test an SCR With an Ohmmeter
How to Test Servo Motors
How to Rewire an Electrical Motor to Generate AC Current
How to Test a Thermistor
How to Troubleshoot an Electric Motor Capacitor Problem
How to Find a Short in a Circuit Board
How to Check if a Diode Is Bad
How to Test an Electrical Relay
How it Works: Voltage Relay
How to Build a Robot Helicopter
How to Diagnose a Circuit Board With a Bad Transistor
What Causes Flickering in Fluorescent Light Bulbs?
How to Test Multimeters

Dont Go!

We Have More Great Sciencing Articles!