Two-phase DC brushless motor

Details Two-phase DC brushless motor Two-phase DC brushless motor

1988-12-07

1990-02-06

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310193, H02K 114

Patent

active

048990752

ABSTRACT:
A two-phase DC brushless motor comprising a stator wherein a pair of stator cores having a plurality of salient poles on a stator yoke mounted on a mounting base plate and a coil body are provided so that the coil body is positioned between the pair of stator cores and the salient poles of the pair of stator cores are angularly spaced at an electric angle of 180.degree. from each other, and a rotor provided with a permanent magnet having N and S poles arranged in the number equal to that of the salient poles of the pair of stator cores in a circumferential direction so as to oppose to the salient poles leaving a slight gap therebetween, wherein each of the salient poles is shaped to have a notched portion in one of opposite corners, in a direction of rotation of the rotor, of the outer end of the salient pole, and further comprising a position detection unit opposed to the permanent magnet for detecting a rotational position of the rotor to switch an energizing direction relative to the coil body.

REFERENCES:
patent: 3508091 (1970-04-01), Kavanaugh
patent: 4318018 (1982-03-01), Kennedy
patent: 4506182 (1985-03-01), Rohdin
patent: 4728833 (1988-03-01), Shiraki et al.
patent: 4794292 (1988-12-01), Torisawa

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