Control system for a wound-rotor motor
Abstract
A load switching circuit for switching two or more transformer taps under load carrying conditions includes first and second parallel connected bridge rectifier circuits which control the selective connection of a direct current load to taps of a transformer. The first bridge circuit is normally conducting so that the load is connected to a first tap through the first bridge circuit. To transfer the load to the second tap, a switch is operable to connect the second bridge circuit to a second tap, and when the second bridge circuit begins to conduct, the first bridge circuit ceases conduction because the potential at the second tap is higher than the potential at the first tap, and the load is thus connected to the second tap through the second bridge circuit. The load switching circuit is applicable in a motor speed controller for a wound-rotor motor for effecting tap switching as a function of motor speed while providing a stepless motor speed control characteristic.
- Inventors:
-
- Chatsworth, CA
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 864582
- Patent Number(s):
- 4388579
- Assignee:
- United States of America as represented by United States (Washington, DC)
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- control; wound-rotor; motor; load; switching; circuit; transformer; taps; carrying; conditions; parallel; connected; bridge; rectifier; circuits; selective; connection; direct; current; normally; conducting; tap; transfer; switch; operable; connect; begins; conduct; ceases; conduction; potential; applicable; speed; controller; effecting; function; providing; stepless; characteristic; speed control; direct current; bridge circuit; switching circuit; motor speed; parallel connected; rectifier circuit; current load; speed controller; load switch; /318/323/
Citation Formats
Ellis, James N. Control system for a wound-rotor motor. United States: N. p., 1983.
Web.
Ellis, James N. Control system for a wound-rotor motor. United States.
Ellis, James N. Sat .
"Control system for a wound-rotor motor". United States. https://www.osti.gov/servlets/purl/864582.
@article{osti_864582,
title = {Control system for a wound-rotor motor},
author = {Ellis, James N},
abstractNote = {A load switching circuit for switching two or more transformer taps under load carrying conditions includes first and second parallel connected bridge rectifier circuits which control the selective connection of a direct current load to taps of a transformer. The first bridge circuit is normally conducting so that the load is connected to a first tap through the first bridge circuit. To transfer the load to the second tap, a switch is operable to connect the second bridge circuit to a second tap, and when the second bridge circuit begins to conduct, the first bridge circuit ceases conduction because the potential at the second tap is higher than the potential at the first tap, and the load is thus connected to the second tap through the second bridge circuit. The load switching circuit is applicable in a motor speed controller for a wound-rotor motor for effecting tap switching as a function of motor speed while providing a stepless motor speed control characteristic.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1983},
month = {Sat Jan 01 00:00:00 EST 1983}
}