How to measure the quality of a single-phase motor without capacitor

How to measure the quality of a single-phase motor without a capacitor? The specific method is as follows:

Measuring the quality of a single-phase motor has nothing to do with the capacitor. Generally, a single-phase motor has four lead wires, one at the head and tail of the main winding, and one at the head and tail of the starting winding.

Use the multimeter RX10 to measure which two are the main windings and which two are the starting windings. If the motor is not damp, you can use a 500VMΩ meter to measure the insulation between the main and secondary windings, and the resistance should not be less than 0.5MΩ. When measuring the insulation between the main and secondary windings to the ground, the resistance should also not be less than 0.5MΩ.

Generally, the secondary winding has more turns, thinner wire diameter, and higher resistance than the primary winding. If the value of the secondary winding measured by a multimeter is lower than the resistance of the main winding, it may be that the insulation between the turns of the secondary winding has been broken down.

Similarly, if the resistance value of the main winding is very low or even equal to 0, it means that the main winding has experienced inter-turn breakdown short circuit.

Single-phase motor capacitor wiring diagram and wiring method

Share the wiring diagram of the single-phase motor capacitor and introduce the wiring method of the single-phase motor capacitor, including the power supply, capacitor, motor wiring requirements and methods, and the two sets of coils of the single-phase motor: the connection method of the main winding and the auxiliary winding.

Several ways of wiring diagram of single-phase motor capacitor

There are several wiring methods for single-phase motor capacitor wiring diagrams, split-phase starting, the centrifugal switch is turned on when the motor is stationary, the centrifugal switch is turned on when the motor is stationary, etc., with detailed motor capacitor wiring diagrams attached.

What is the reason? Is it that the capacitor capacity is too large or too small? Why do single-phase motors often burn capacitors? Here are five possible reasons. Let's take a look together.