A new type of induction machine with inner and outer double rotors

A new type of double-rotor induction machine (DRIM) with inner and outer rotors has the advantage of low leakage inductance and high operation performance. This paper introduces the structure and operation principle of the DRIM. A prototype machine has been designed and built. The magnetic field analysis by means of the MAGNETO software shows that the magnetic field distribution of the DRIM is reasonable and similar to the conventional machine, in spite of its structure and stator windings being greatly different from the conventional induction machine.