| Abstract |
The paper presents a very simple and inexpensive variable speed electronic motor fed with pulsating DC current, which is produced by a converter using just one or two power switches. The motor has high torque density and a single predetermined direction of starting rotation [1,2]. Recuperative braking and in certain circumstances electronic speed reversal is possible. The stator of the motor has a laminated iron core which is quite similar to those used in series motors. There are two coils, each encompassing two salient poles with sparsely laminated inner surfaces and a permanent magnet between them. The PMs not only define parking positions for the reluctance type rotor but through their participation in the electromechanical energy conversion a net contribution to shaft torque is produced. The rotor bas asymmetric laminated type salient poles and no windings. There is a very wide range of possible applications e.g. driving fans and pumps. Some other types of driven objects must be avoided, e.g. where continuous operation at very low speed is required. |
