Brushless motor
US5969445A · kind A · utility
31Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Mar 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless motor which includes an arrangement to prevent dielectric breakdown of electronic parts mounted on a control board. The breakdown is caused by a heat sink which becomes electrostatically charged. The potential at the heat sink, which contacts switching devices (for instance, FETS) of the brushless motor, is equalized with the potential at one side of a source line for a drive circuit formed on the control board that includes the switching device. As a result, when the heat sink becomes electrostatically charged, the charge at the heat sink can be discharged to the source line, thereby eliminating the above problem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.