Control motor integrated with a direct current motor and a speed control circuit
US5119466A · kind A · utility
100Cited by
11References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | May 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control motor comprising an integrated direct current motor and speed control circuit, the speed control circuit controlling a rotational speed of the direct current motor by means of changing a voltage applied to an armature by a chopping of a switching element, the speed control circuit being composed upon a printed circuit board, the printed circuit board being supported in the direct current motor by a case member formed of a heat-conducting material, and a radiation portion of the switching element which is closely contracted with a projection formed integrally with the case member and is installed in the projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.