H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/68
H02K 37/00 (2006.01) H02K 21/38 (2006.01)
Patent
CA 1081756
ABSTRACT: A synchronous motor, in particular a stepping motor, with two coaxial stator sections which are each provided with a ring coil and with two circular systems of teeth, which are shifted by half a tooth pitch relative to each other. The two stator sections are shifted by a quarter tooth pitch relative to each other. In addition the motor comprises means, in parti- cular an axially magnetized permanent-magnetic ring which is disposed between the two stator systems, for magnetizing the two systems of teeth of the stator sections with mutually the same polarity. The two systems of teeth of each stator section are constituted by annular parts which are provided with teeth at the inner circumference, which annular parts form part of the magnetic circuit which surrounds the annular coil and which annular parts are disposed concentrically in such a way that the axial distance between the teeth of both systems is at least a few times greater than the air gap between stator and rotor. -33-
281663
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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