Prince
Member
- Join Date
- Jun 2002
- Posts
- 284
In our new project I tried to persuade our mechanics for using an AC motor instead of a normal DC that we normally use for the pinch roll. They know the power it would be 55KW.
it is cheaper for sure. regarding the speed I told them to choose a 4pole standard squirrel cage motor (for example 1LA7-1LA5 Siemens motor) I told them that I can give the nominal torque app. from zero speed to 1440 with vector control and I can have constant power in the speeds beyond 1440. but how far they can go ? in DC motors we had 2 speeds one as the max. torque limit and the other for the nominal power. but for AC motors How fast can they go?
it is cheaper for sure. regarding the speed I told them to choose a 4pole standard squirrel cage motor (for example 1LA7-1LA5 Siemens motor) I told them that I can give the nominal torque app. from zero speed to 1440 with vector control and I can have constant power in the speeds beyond 1440. but how far they can go ? in DC motors we had 2 speeds one as the max. torque limit and the other for the nominal power. but for AC motors How fast can they go?