Single-phase synchronous motor with two-pole permanent-magnet ro

Details Single-phase synchronous motor with two-pole permanent-magnet ro Single-phase synchronous motor with two-pole permanent-magnet ro

1985-01-22

1987-01-13

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 41, 310156, H02K 2108

Patent

active

046366768

ABSTRACT:
A single-phase synchronous motor with a two-pole permanent-magnet rotor of a magnet material having a remanence B.sub.r, a specific density .rho., a rotor diameter d, a resulting detent torque of an amplitude M.sub.k1, and a mass moment of inertia J. In the single-phase synchronous motor, high-energy magnet materials are used for the rotor, which rotor material is characterized by the constant ##EQU1## The moment of inertia J and/or the detent torque M.sub.k1 should be influenced in such a way that the natural frequency ##EQU2## of the low-amplitude freely oscillating system comprising the rotor and the load is unequal to the mains frequency .omega..sub.e. In the design of a single-phase synchronous motor this may result in, for example, the air gap at the narrowest point being enlarged in comparison with the dimensions of conventional motors having rotors with conventional permanent magnet materials.

REFERENCES:
patent: 3041513 (1962-06-01), Reiches
patent: 3433987 (1969-03-01), Thees
patent: 4499389 (1985-02-01), Hoche
patent: 4575652 (1986-03-01), Gogue
Schemmann, H., "Zweipolige Einphasen-Synchronmotoren mit Dauermagnetischen Loufer Eigenschaften und Anwendung", Feinwerktechnik und Messtechnik 87(1979), pp. 163-169.

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