Reduced current sharing ripple
US11588394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2021 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | May 15, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.