Patent classifications
H
ELECTRICITY
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H02
GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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H02K
DYNAMO-ELECTRIC MACHINES
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37/00
Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
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H02K37/10
of permanent magnet type
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H02K37/12
with stationary armatures and rotating magnets
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H02K37/14
with magnets rotating within the armatures
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H02K37/18
of homopolar type
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