The high power supply voltage exceeds the additional voltage of the motor by more than 10%, causing an increase in iron loss and heating of the motor. DC brushless water pump

If the power supply voltage is too low, which is more than 5% lower than the additional voltage of the motor, the motor will generate heat when operating under additional loads. The solution is to adjust the level of the transformer tap changer and adjust the power supply voltage to the normal range. The three-phase power supply voltage is unbalanced, and the voltage imbalance between phases exceeds 5%, which causes the three-phase current imbalance and causes the motor to heat up. Phase loss operation.

If the motor load is too large, it is necessary to reduce the load or replace the motor with a suitable capacity. If the motor is started too frequently, there may be mechanical load problems.

The reason why the DC brushless motor cannot be started

Lack of power supply voltage or poor contact;

The control circuit of the DC brushless motor controller is not connected or underconnected;

Motor Hall damage, motor coil insulation degradation leading to burning, and motor rotor magnetic steel loss of excitation;

The motor load far exceeds its own load torque;

The power supply voltage is too high or unstable.

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