Stepper motor power calculation
Publish Time：
2025-04-23
Some customers, when purchasing stepper motors, often inquire about the output power of the stepper motor.
Some customers, when purchasing stepper motors, often inquire about the output power of the stepper motor. Today, we will introduce some information about the output power of stepper motors.
As a power component, stepper motors have a wide range of speeds. Customers can control the motor's speed and start/stop position as desired, according to their actual needs. Generally, the output torque of a stepper motor decreases as the motor speed increases. In addition, when the motor is running, the output torque of the motor will also change with different set drive voltage values and control current values. From the above characteristics, it can be seen that the output torque of the stepper motor changes with the change of the motor's operating state. Since the output power of the motor is proportional to the output torque of the motor, it can be known that the power of the stepper motor will also change with the change of the motor's operating state.
When the operating state of the stepper motor is determined, you can estimate the output power of the stepper motor under the current state using the following formula:
P=2πωN/60
Where: P is power, unit: watt (W);
ω is the speed in revolutions per minute, unit: rpm;
N is the output torque under this state, unit: Newton-meter (N.m)
In most cases, the stepper motor will involve multiple speed ranges during use, and the acceleration and deceleration process of the motor is controlled by a software program. In this process, the output torque of the motor is dynamically changing, and its output power is also a dynamic variable. Therefore, during the selection stage of the stepper motor, the output power is not specified, but the torque that the motor can provide under certain drive conditions is specified.
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