Reasons and solutions for unbalanced no-load current of three-phase asynchronous motors

Why do three-phase asynchronous motors sometimes experience faults such as uneven no-load current and significant differences during operation? How to solve such a fault in a three-phase asynchronous motor? Below, the editor will take you to understand the reasons and solutions for the imbalance of no-load current in three-phase asynchronous motors.

1. When the power supply voltage of a three-phase asynchronous motor is unbalanced, we need to measure the power supply voltage of the motor, find the cause, and eliminate the fault.

2. When the winding ends of a three-phase asynchronous motor are connected incorrectly, the solution is to identify the ends and correct them before restarting the motor for testing.

3. When the three-phase asynchronous motor is rewound or the number of turns in the three-phase winding is uneven: the solution is to correct the winding rewinding.

4. When there is a fault in the winding of a three-phase asynchronous motor, such as inter turn short circuit, reverse connection of a certain group of coils, etc., we need to disassemble the motor to check the polarity of the winding and identify the cause of the fault, and then correct or eliminate the fault.