簡單的說，電機(jī)轉(zhuǎn)矩是指其轉(zhuǎn)動力量的大小，是電機(jī)拖動負(fù)載能力的具體表現(xiàn)。在電機(jī)產(chǎn)品的性能參數(shù)中，以額定轉(zhuǎn)矩、小轉(zhuǎn)矩和大轉(zhuǎn)矩表征其不同狀態(tài)下的性能指標(biāo)。

小轉(zhuǎn)矩是電機(jī)起動性能的特性，額定轉(zhuǎn)矩是電機(jī)額定運行條件下對應(yīng)的力能指標(biāo)，而大轉(zhuǎn)矩則反映電機(jī)的過載能力；不同的產(chǎn)品特性和使用工況對轉(zhuǎn)矩的要求不同。

對照同中心高、同功率但不同極數(shù)的電機(jī)可以發(fā)現(xiàn)，多極低轉(zhuǎn)速電機(jī)的轉(zhuǎn)矩較大，在電機(jī)的短路試驗中可以發(fā)現(xiàn)，較小規(guī)格的少極電機(jī)，制動相對容易，而多極的低轉(zhuǎn)速電機(jī)制動就比較困難。從電機(jī)的外觀特征比較，除特別小或特別大的規(guī)格電機(jī)外，同樣中心高同功率的電機(jī)，低速電機(jī)的軸伸直徑比較大，因為其運行中承載的負(fù)載要比較大，這也是針對于電機(jī)轉(zhuǎn)矩特性的尺寸保證要求。

Simply put, motor torque refers to the magnitude of its rotational force, which is a specific manifestation of the motor's ability to drag loads. In the performance parameters of motor products, the performance indicators under different states are characterized by rated torque, minimum torque, and maximum torque.
The minimum torque is a characteristic of motor starting performance, the rated torque is the corresponding force energy index under the rated operating conditions of the motor, and the maximum torque reflects the overload capacity of the motor; Different product characteristics and usage conditions have different requirements for torque.
By comparing motors with the same center and high power but different pole numbers, it can be found that multi pole low speed motors have higher torque. In the short circuit test of the motor, it can be found that small pole motors with smaller specifications are relatively easy to brake, while multi pole low speed motors are more difficult to brake. From the comparison of the appearance characteristics of motors, except for motors with particularly small or large specifications, motors with the same center height and power have a larger shaft extension diameter at low speeds because they carry a larger load during operation, which is also a size guarantee requirement for motor torque characteristics.