A study of the modified Kramer or asynchronous — Synchronous cascade variable-speed drive

@article{Liwschitz1942ASO,
  title={A study of the modified Kramer or asynchronous — Synchronous cascade variable-speed drive},
  author={M. M. Liwschitz and Lee A. Kilgore},
  journal={Electrical Engineering},
  year={1942},
  volume={61},
  pages={255-260}
}
LARGE wind tunnels require a wide range of speed and accurate speed control and if their use factor is high, a high efficiency over the working range is desirable. Also minimum disturbance to the power system is important in many cases. To meet these requirements a speed-control system has been adopted which, while not new in principle, involved the solution of a number of interesting problems. The system as shown in Figure 1 consists of a wound-rotor driving motor (A) whose secondary winding… 

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  • M. M. Liwschitz
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    Transactions of the American Institute of Electrical Engineers
  • 1941
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