The load variation of the rubber mill is relatively large when it is working. Considering that actual production applications sometimes require load startup, and the powdery compound flying during mixing can easily cause a short circuit in the motor, so the conditions for driving the motor are:
1. The starting torque must be large.
It can fully satisfy forward and reverse rotation at the same time.
2. It has overload characteristics and requires its Mmax/M rating to be 2 to 2.5 times or more.
3. The rotation speed must be constant.
4. For safety reasons, the operating braking performance must be particularly good.
5. Adopt closed type.
The commonly used drive motors we see for rubber mills are generally three-phase asynchronous AC motors, squirrel-cage rotor enclosed self-fan-cooled asynchronous motors, which have a simple structure. Although the dust-proof starting performance is average, it has the above 6 aspects. Moreover, since rubber mills are often started with an empty truck, their starting performance can fully meet the requirements.

Next: What should be paid attention to during the load test operation of the internal mixer?