3-position rotational actuator

Details 3-position rotational actuator 3-position rotational actuator

1988-07-25

1990-02-06

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 36, 310 43, 335272, H02K 700, H02K 3312

Patent

active

048990736

ABSTRACT:
The present invention relates to a 3-position rotational actuator which obtains three stable points by two pairs of field poles, in which the magnetic flux to a rotor due to one pair of field poles of a stator for maintaining the rotor at the first stable point is substantially equal to the magnetic flux to the rotor due to the other pair of field poles of the stator for rotating the rotor from the first stable point. The magnetic flux density of the other pair of field poles of the stator applied to the rotor is set to be smaller than the magnetic flux density of the one pair of field poles of the stator. Therefore, the detention torque can be maintained to the same degree and the drive torque can be improved.

REFERENCES:
patent: 3644763 (1972-02-01), Skrobisch
patent: 3959672 (1976-05-01), Walker et al.
patent: 4609841 (1986-09-01), Masaki et al.

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