AC current detecting device for inverter apparatus and AC current detecting method therefor
US6693404B2 · kind B2 · utility
6Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Mar 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5387
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Establishing a current detection system good in accuracy allows implementation of a reduction in the size of an inverter apparatus good in current detection accuracy, even if the number of current sensors is reduced.A current sensor of a DC section and a current sensor corresponding to one phase of an output AC current are used, and means for determining switching patterns of DC main elements and determining a current component of Idc or means for detecting a maximum value of Idc is used, thereby determining an AC current value and a power factor angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.