Electrical machine with unequal pole faces

Details Electrical machine with unequal pole faces Electrical machine with unequal pole faces

H - Electricity

02

K

310/65

H02K 23/26 (2006.01) H02K 19/10 (2006.01) H02K 21/20 (2006.01) H02K 21/22 (2006.01) H02K 21/44 (2006.01) H02K 23/40 (2006.01)

Patent

CA 1273980

ABSTRACT: An electrical machine of the electromagnetic type comprises a rotor (2) and a stator (5) as machine parts, means for generating an excitation flux, and active coils (W1-W5). In operation the coils link at least a portion of the excitation flux and generate a rotational e.m.f. The rotor and the stator comprise poles, the number of stator poles (N1-N6, S1-S6) diffe- ring from the number of rotor poles (T1X-T5X), The rotor and the stator are constructed in such a way that as a result of the rotation of the rotor relative to the stator during operation the flux pattern of the portion of the excitation flux linking with the active coils rotates relative to the machine part carrying the active coils. Said flux pattern rotates with such an angular velocity that the absolute value of the difference between said angular velocity and the angular velocity of the machine part comprising the active coils is larger than the absolute value of the difference in angular velocity between the rotor and the stator. For this purpose the pole faces (RS) of the rotor poles, viewed in the circumferential direction of the rotor, have another width than the pole faces (PS) of the stator poles. Moreover, the active coils are arranged diametrally in the form of a cylindrical winding or in the form of an annular winding. Fig. 4.

542013

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