Switching power supply unit
US8400120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Sep 24, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control function formula which provides a relationship between an output voltage signal Vo and an output differential value with, for example, a negative linear function is defined in a calculation means. The calculation means samples an input voltage signal, an output voltage signal and an output differential signal at time instants in synchronization with a cycle of switching of a main switching element, and calculates subsequent ON and OFF durations of the main switching elements such that the control function formula might be satisfied. A drive pulse generation means generates a drive pulse with which the main switching element is turned on and off based on the ON and OFF durations determined by the calculation means. The output differential signal is generated by, for example, a capacitor current detection means or an observer device which detect a current of a smoothing capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.