Variable speed electronic motor and the like
US4039909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1975 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Feb 10, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable speed electronic motor having wound polyphase armature and field windings each of which is energized by a polyphase source whose voltage and frequency are variable in a controlled fashion. Provision is made to control the excitation of the armature and field windings so that the torque output is optimized for all loads and speeds. Also, the machine disclosed can be made to function in a generating mode; hence, there can be flow of both electrical and mechanical energy to and from the machine and the amount of each can be carefully regulated. In addition, a variation of the machine, acting purely in a generating mode, can be programmed to regulate electrical output of the machine independent of the angular velocity of the machine, and output power can be similarly regulated, all within reasonable limits. Also, for some requirements one winding can be energized at a constant frequency and voltage and the other can be excited at variable frequency and voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.