Speed-limited electrically compensated constant speed drive
US4841202A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Dec 28, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrically compensated constant speed drive which is speed limited so that power flow through the speed compensation link is unidirectional includes a permanent magnet generator which is interconnected with a permanent magnet motor by a power converter. The permanent magnet generator and the permanent magnet motor are controlled by first and second independent control loops. The power converter includes an AC/DC converter coupled to electrical power windings of the permanent magnet generator, a filter coupled to the output of the AC/DC converter and an inverter coupled between the filter and electrical power windings of the permanent magnet motor. The permanent magnet generator, AC/DC converter, filter and the first control loop together develop a voltage on a DC bus. The voltage on the DC bus, which is coupled to the inverter, is sufficient to operate the permanent magnet motor with the required speed and torque, and thus the second control loop need not implement a voltage control scheme, such as a PMW control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.