When the 3 phase motor torque becomes large, will speed be slow?

For the same power of the 3 phase motor, when the torque of the motor is small, the corresponding speed should be fast; When the torque of the motor is large, the corresponding speed is slow. As for the relationship between the two, we used to communicate theoretically with you through specific formulas. Through the size relationship between the two, we can better understand the same power motor with the same rated voltage and the same center height, and the torque of the low-speed multi-pole motor is larger than that of the high-speed low-pole motor. In other words, under the same power conditions, the high-speed motor has a small torque but runs fast, while the low-speed motor runs slowly but has a strong drag load capacity. It is relatively easy to understand the constant power operation of the variable frequency motor through this relationship.

Therefore, for the relationship between torque and speed, there is no condition constraint, there is no size comparison relationship between the two, under the same torque conditions, the faster the speed of the corresponding motor power is greater, similarly, under the same speed conditions, the greater the corresponding power is greater. In the selection process of the motor, we should select the qualified motor products according to the specific working conditions, first of all, we should fully understand the size of the dragged load, which is directly related to the torque index of the motor; Secondly, it must be clear that the operating speed of the equipment being dragged, which matches the speed of the motor; These two indicators basically determine the power and the number of poles of the motor.

In the motor nameplate data, the power and speed are directly marked, and the torque can be obtained by simple calculation.