Elevator DC motor drive with unity power factor, including regeneration
US6163472A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | May 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Power of three-phase AC mains is directly converted to DC power by a DC matrix converter employing insulated gate bipolar power transistors to directly connect the AC mains to an elevator DC motor for periods of time which are short compared with the period of the AC voltage, so as to continuously synthesize the desired AC voltage to the elevator motor. Filters are provided at the input and output of the DC matrix converters. Separate DC matrix converters may supply both the armature current and the field current to an elevator motor. Signals for selectively gating the power transistors are provided by converter control logic in response to a conventional phased locked loop, an elevator motion controller, and position speed and current control logic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.