Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1996-04-16
1998-07-14
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310179, 310180, 310258, H02K 3712, H02K 122, H02K 3714
Patent
active
057809445
ABSTRACT:
A two-phase permanent-magnet electric rotating machine in which vibration and noise are less is provided. The machine is constituted by: a stator having 2.sup.n main poles (n being an integer satisfying n.gtoreq.2) each of which has at its end portion a predetermined number of magnetic teeth and has a winding provided thereon; and a rotor having permanent magnets formed so that N (north) and S (south) equal in number of the permanent magnets are alternately disposed in a direction of rotation of the rotor; wherein 2.sup.(n-1) alternate ones of the main poles are made to be in-phase and a half ones of the in-phase main oles have a polarity which is opposite to a polarity of the other ones. It is preferable to make the number of the magnetic pole pairs of N and S of the rotor be 4m .+-. 1 (m being an integer satisfying m.gtoreq.1) when the value n is set to 2. It is preferable to form the windings so that the in-phase main poles of the stator are made to be alternately inverted in polarity.
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Japan Servo Co. Ltd.
Nguyen Tran N.
Stephan Steven L.
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