Pulse-width modulated inverter system and method
US4291368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Mar 30, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/527
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulse-width modulated inverter system and a method for operating the same is described for providing three-phase power to a load at a preselectable output frequency and a preselectable output voltage wherein modulated inverter logic control circuitry is provided for activating switching devices to produce waveforms at output terminals having at least one pulse of a variable width disposed symmetrically about the center or 90.degree. point in the middle 60.degree. portion in each half cycle thereof. The width of the pulses are varied continuously to obtain the preselected output voltage. The number of pulses to be added in the middle 60.degree. portion in each half cycle of the waveforms is increased automatically and continuously as the preselectable output frequency is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.