#three-phase current

Why is the three-phase current of the motor unbalanced?

Three-phase voltage unbalance If the three-phase voltage is unbalanced, there will be reverse-sequence current and reverse-sequence magnetic field in the motor, resulting in a large reverse-sequence torque, resulting in an unbalanced distribution of the three-phase current of the motor and increasing the current of a certain phase winding. When the three-phase voltage unbalance reaches 5%, the…