Abstract
Up to this time only the sub-synchronous cascade has been used for the speed control of a slip ring motor. It is also possible to obtain super-synchronous speed by reversing the direction of the power flow in the cascade circuit. In this operation mode the converter at the slip ring side must be able to function as an inverter.The proposal of this system made in (1) claims the following advantages: If twice the synchronous speed is chosen as maximum (rated) speed, the power of the machine is doubled, only half the rated power must be transmitted by the converter, and the maximum of the reactive power occurs at synchronous speed and accounts to about half the rated power It can be reduced by further measures. These measures at the line side converter and at the slip-ring side converter are described. The control and signal processing are also covered in this paper.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
