Filters for adjustable speed drives with low DC bus capacitance and methods of manufacture and use thereof
US10312881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2017 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Jan 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In some embodiments, the instant invention provides a drive filter that includes: a plurality of input contacts configured for receiving an initial three-phase alternative current from a three-phase alternative current power source; a plurality of output contacts configured for outputting an output current to a respective phase of an adjustable speed drive, where the adjustable speed drive has a direct current bus capacitance between 1 and 30 microfarads (uF); and a plurality of electrical connections, where each electrical connection is configured to connect each input contact of the plurality of input contacts to a respective output contact of the plurality of output contacts; and where each electrical connection consists of at least one line capacitor; and where the at least one capacitor has a capacitance value such that a total harmonic current distortion (THID) of the output current is reduced to 5 percent or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.