US 4,429,245 A · External rotor production for synchronous hysteresis motor

Abstract

An external rotor electric synchronous hysteresis motor. A stator provides a rotating electromagnetic field. The hysteresis ring is formed by a deep-drawn rotation symmetrical steel rotor pot having a jacket part for surrounding the stator coaxially and having a bottom part which is provided with a center hole. An end shield is cast into the bottom part of the rotor pot. A shaft is set into the end shield for supporting the rotary motion of the rotor pot. The rotor pot can be deep-drawn from a steel plate into a molded pot blank, the molded pot blank can be machined to a finished rotor pot, the rotor pot can be heated to a temperature from 750.degree. C. to 900.degree. C. in an inert atmosphere and the jacket part of the rotor pot can be quenched by lowering the same into a cold oil bath under continuous rotation.

Claims20

Dependent claims

External rotor electric motor comprising a stator providing a rotating electromagnetic field;

a deep-drawn rotation symmetrical rotor pot of steel having a jacket part being a hysteresis ring and surrounding the stator coaxially and having a bottom part which is provided with a center hole, where the steel of the rotor pot includes the following minor components:
0.95 to 1.1 weight percent carbon,
0.15 to 0.35 weight percent silicon,
0.25 to 0.4 weight percent manganese,
1.35 to 1.65 weight percent chromium;
an end shield die cast into the bottom hole of the rotor pot;
and
a shaft set into the end shield for supporting the rotary motion of the rotor pot.

5 more elements

Dependencies are inferred from the claim text.

External rotor production for synchronous hysteresis motor

Life of this patent

External rotor production for synchronous hysteresis motor

Life of this patent

Abstract

Claims20