Exploring suitable applications for doubly-fed asynchronous machines

This paper explores the global performances of doubly-fed asynchronous machines for different specifications: motor and/or generator operation, different torque-speed characteristics of the mechanical load or the prime mover. Simplified models of the active and reactive power balance are used to illustrate the capabilities of such a drive system. The DFAM synchronous speed selection is included in the analytical formulation. A steady-state torque-speed characteristic of such a drive system is presented as well. Results show that the DFAM drive system can be interesting for many applications with a torque rapidly increasing with the mechanical speed.