Method and device to protect an ESP power supply from transient over-voltages on the power grid
US9899831B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2011 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Dec 14, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply converter unit is disclosed, in particular for an electrostatic precipitator, converting the frequency of alternating input supply (1) to high frequency alternating output (Ua, Ub) by rectifying the alternating input supply (1) in a rectifier (12) to a direct current (Udc), which is converted to alternating-current in a full bridge inverter (13) in a H-bridge circuit with switches (48) controlled by a control unit (23). According to the invention on the input side of the rectifier (12) and/or in the direct current (Udc) section there is provided at least one overvoltage protection circuitry (34, 35, 37-39, 45). Furthermore the invention discloses a method of operation of such a power supply converter unit as well as uses of such a power supply converter unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.