Inverter apparatus operatable over extended frequency range while suppressing output error
US6169670A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 5, 2000 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Apr 5, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter apparatus operatable over an extended output frequency range having an increased upper limit with error contained in the output voltage being suppressed by eliminating dispersions of PWM pulse signals. A PWM command pulse signal and an output voltage detection signal derived from the output of the inverter are compared straightforwardly with each other for determining difference therebetween on the basis of which error contained in the inverter output voltage is canceled. An isolation device for isolating electrically a low-voltage-rated control circuitry and a high-voltage-rated main circuitry from each other is inserted between a PWM command pulse signal generating circuit and a pulse width correcting circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.