Big Causes of Single Phase Motor Malfunctions

Most problems with single-phase motors are relate to centrifugal switches, thermal switches, or Motor. If there is a problem with the spin switch, thermal switch, or condenser, usually repair and repair the motor. However, if the engine produces 1 horsepower. More than 10 years, normal engine replacement practice. If the engine power is less than 1/8 horsepower. This will change in most cases.

Solves the problem of two-phase (single-phase) motors.
Single-phase motors have a starter coil and winding. When the engine accelerates, the centrifugal switch automatically shuts off the starter coil. Some single-phase motors also have a thermal switch. That automatically shuts off the motor in the event of overheating. The thermal switch can be reset manually or automatically. Please note that an engine with automatic restart can be reset automatically at any time.

Follow these steps to troubleshoot a single-phase motor:

  • It looks like a motorcycle. Visually inspect the engine. Replace the engine if it burns, the shaft is clogged or damage.
  • Make sure the motor is control by a thermal switch. If the thermal switch is mechanical, restart the thermal switch to start the engine.
  • If the motor does not start, check the voltage at the motor terminals with a voltmeter. The voltage must be less than 10% of the rate motor voltage. If the voltage is not correct, repair the motor circuit. If the voltage is correct, stop the motor and check the motor.
  • Close the safety switch or the composite starter handle. Exclude the trigger and mark it according to the company policy.
  • If the Fluke 87V is off, connect it to the same motor connector from which you unplug the power cord. The ohmmeter reads the resistance of the starter and drive coil. Because the coils are parallel, the connection strength is less than the of only two coils. If the counter shows 0, there is a short circuit. When the counter shows infinity, it is a white circle. The engine must always be replace. Note: he engine is too small for a cheap repair.
  • Visually inspect the centrifugal switch for wear or damage to the spring. Repair or replace the switch if you see obvious signs of damage. If not, check the switch with an ohmmeter.
  • Manually activate the rotary switch. (You may need to remove the plate clamp on the side of the switch.) If the motor is in good condition, the ohmmeter will reduce the resistance. If the obstacle does not change, there is a problem. Check it out to see more issues.

Solves the problem of capacitor motors

A capacitor motor is a single-phase motor with one or two capacitors. Capacitors increase starting torque and / or motor operation. Solving the problem of capacitor motors is the same as solving the problem of single-phase motors. The only accessory to consider is the capacitor. Capacitor life is limit and is often a problem with capacitor motors. Capacitors can be lower, open, or broken if they need to be replace. As the capacitor wears out, the value of the capacitor changes, which can cause additional problems. A short circuit in the capacitor can burn the motor coils. If the capacitor breaks or opens, the motor starting torque is not good. If the initial torque is low, the engine will not start and may normally restart.

A dielectric is an environment in which an electric field is maintain with little or no external energy. The type of material use to insulate the conductive surface of the capacitor. Capacitors are oily or electrolytic. The oil condenser is fill with oil and seal in a metal container. Oil acts as a genetic material. Many engines use electrolytic capacitors instead of oil capacitors. Electrolytic capacitors are form by winding two sheets of paper separate by a thin sheet of paper.

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