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Can I run a motor with lower voltage?

Operating a motor at the outer limits of its voltage requirements reduces its efficiency and causes premature failure. The economic loss from premature motor failure is devastating.

Motors are essential components in various equipment and machines, and they are designed to operate within a specific voltage range. However, sometimes we may encounter a situation where we need to run a motor at a voltage lower than the rated voltage. Whether low voltage operation can cause damage to the motor is a concern for many people.

The operating status of the motor under low voltage

Running a motor at a voltage lower than its rated voltage can have several negative effects on motor performance. The speed and torque of a motor is proportional to the voltage supplied to it, which means that lowering the voltage will reduce the speed and torque of the motor. In addition, the motor may not start at all or may not operate properly due to the weaker electromagnetic field created by the lower voltage.

Of course, when the voltage is lower than rated, the current needs to be increased to ensure that the motor provides the original power, the current will increase in approximately the same proportion as the voltage is reduced, once the current exceeds the rated current, it is easy to cause the motor to accumulate heat, and it is very easy to produce motor overheating problems, but if the current is kept below the nameplate value, it will not damage the motor.


In summary, running a motor at a voltage lower than the rated voltage can have a significant negative impact on the performance and service life of the motor. It is not recommended and should be avoided unless absolutely necessary.

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