Synchronous motor with sinusodial torque variation in each phase

Details Synchronous motor with sinusodial torque variation in each phase Synchronous motor with sinusodial torque variation in each phase

Filed on

1988-06-24

Date issued

1990-01-02

Examiner

Salce, Patrick R.

Patent Class

Electrical generator or motor structure

SubClass

Dynamoelectric

SubSubClass

Rotary

Other Related Categories

310193, 310254, 310268, H02K 1902, H02K 1600

Type

Patent

Status

active

Patent number

048915386

Description

ABSTRACT:
In synchronous electric motors of the type having a movable multipolar permanent magnet member and a stator comprising magnetic circuits coupled to a control coil. The magnetic circuits form an air-gap of variable height in which the permanent magnet member is movably arranged.
The improvement defines the height of the air-gap as a function of the position of the movable member, taking into account various design parameters of the motor, in order to obtain a purely sinusoidal variation of the torque produced in each phase of the motor by a constant control current.

REFERENCES:
patent: 3700944 (1972-10-01), Heintz
patent: 4330727 (1982-05-01), Oudet
patent: 4518883 (1985-05-01), Oudet
patent: 4658166 (1987-04-01), Oudet
patent: 4714854 (1987-12-01), Oudet
patent: 4748359 (1988-05-01), Yahaka et al.

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