Harmonic neutralization of static inverters by successive stagger
US5337227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Apr 15, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0064
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Quasi-harmonic neutralized inverter systems are provided with interphase transformers connected in a waffle tree configuration and each having a pair of inputs for receiving staggered voltage waveforms, wherein the stagger angle of the voltage waveforms reduces a harmonic component of an output voltage on an output terminal of each interphase transformer. Inverters produce voltage waveforms at phase angles necessary to provide the required stagger angles at the inputs of the interphase transformers in a first stage of the waffle tree configuration. A method for quasi-harmonic neutralization of voltages in an inverter system is also provided, in which interphase transformers, each having a pair of inputs for receiving staggered voltage waveforms, are connected in a waffle tree configuration, such that the stagger angle of the voltage waveforms reduces a harmonic component of an output voltage on an output terminal of each interphase transformer. Voltage waveforms at phase angles necessary to provide the stagger angles are applied to the inputs of the interphase transformers in a first stage of the waffle tree configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.