TERMIUM Plus^®

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A new type of electric motor, a brushless motor with no windings or permanent magnets on its rotor. When a current flows in one of the group of windings in the case around the rotor, it creates a magnetic effect which pulls a tooth on the rotor into a position of "minimum reluctance". Rotation continues by switching the current to another winding and pulling another tooth into position. Switch the current fast enough, and the motor spins.  1, fiche 1, Anglais, - switched%20reluctance%20motor

Record number: 1, Textual support number: 1 CONT

Such motors have been turning since 1840, but the new SRM designs provide a practical way of switching large currents many thousands of times a second. Several companies including Black and Decker (power tools), Kenwood (food mixes) and Vent-Axia (fans) are sponsoring an SRM development programme. This technology may produce smaller and even simpler electric motors that could be integrated within the hub of a carwheel or of a boat.  1, fiche 1, Anglais, - switched%20reluctance%20motor

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