H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/58
H02K 37/00 (2006.01) H02K 1/12 (2006.01) H02K 1/22 (2006.01) H02K 21/38 (2006.01) H02K 37/20 (2006.01)
Patent
CA 1135758
3.3.1980 1 PHN 9491 ABSTRACT: A stepping motor with a first and a coaxially disposed second stator section, which stator sections are axially separated by a coaxially disposed permanent-magnetic ring. On the inside each stator section terminates in two coaxially disposed annular systems of teeth. The systems of teeth of each stator section have been shifted nominally by 1/2 tooth pitch relative to the rotor teeth and the systems situated on the outside relative to the permanent magnetic ring as well as the systems of teeth situated on the inside relative to the permanent magnetic ring exhibit a nominal mutual shift relative to the rotor teeth of 1/4 tooth pitch. Stepping angle errors in this stepping motor can now be eliminated to a high degree by symmetrically correcting the displacement of the outer systems of teeth relative to each other and/or the displacement of the inner systems of teeth relative to each other.
354169
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
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