Four-quadrant AC-AC drive and method
US6166513A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2000 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Apr 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/4585
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric drive apparatus and method for controlling medium-voltage alternating current motors wherein a multi-phase power transformer having multiple secondary windings provides multi-phase power to multiple power cells which provide four quadrant operation. Each power cell has a single-phase output and is controllable by a modulation controller. The power cells are connected in series thus permitting the maximum output voltage for each cell to be less than the maximum line-to-line voltage. Each power cell can have a rectifier portion to convert input AC-to-DC, capacitors, an output DC-to-AC inverter, a regenerative bridge converter connected in parallel with the rectifier portion and a local modulation controller connected to a master controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.