Fan cooler
US6285157A · kind A · utility
9Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fan cooler for electric or electronic sub-assemblies having a control circuit with a control stage for controlling the speed of rotation of a fan motor connected to the control stage depending on set values. To achieve a polyvalent operation with a simple design, the fan motor is a phase-controlled asynchronous motor, the control circuit has a microcontroller that controls the control stage, an optic coupler is connected between the control stage and the microcontroller, and the microcontroller determines the operating angle for controlling the fan motor on the basis of the set values and the zero crossing of a control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.