Ventilation device and electrical equipment in which same is installed
US8602747B2 · kind B2 · utility
7Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2009 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Jun 18, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D27/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Having a correlative relation indicator for indicating a correlative relation so that the supply current to be supplied to an inverter circuit may be varied proportionally to the voltage applied to the inverter circuit, a supply current value controller controls the average current to be supplied to the inverter circuit so as to be equal to the value of the supply current indicated by the correlative relation indicator, and therefore if the pressure loss or the static pressure is changed, a wind volume-static pressure of high precision extremely small in the changing amount of wind volume is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.