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Title: DC switching regulated power supply for driving an inductive load

Abstract

A power supply for driving an inductive load current from a dc power supply hrough a regulator circuit including a bridge arrangement of diodes and switching transistors controlled by a servo controller which regulates switching in response to the load current to maintain a selected load current. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. The regulator may be operated in three "stages" or modes: (1) For current runup in the load, both first and second transistor switch arrays are turned "on" and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned "off", and load current "flywheels" through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays "off", allowing loadmore » current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load. The three operating states are controlled automatically by the controller.« less

Inventors:
 [1]
  1. (Norris, TN)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865830
Patent Number(s):
US 4585986
Assignee:
United States of America as represented by Department of Energy (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
dc; switching; regulated; power; supply; driving; inductive; load; current; regulator; circuit; including; bridge; arrangement; diodes; transistors; controlled; servo; controller; regulates; response; maintain; selected; opposite; legs; formed; parallel-connected; transistor; arrays; respectively; third; fourth; appropriately; connected; parallel; diode; operated; stages; modes; runup; switch; supplied; reaches; desired; level; flywheels; array; leg; connecting; series; maintained; alternating; suitable; duty; cycle; rate; set; rapid; rundown; accomplished; allowing; dumped; source; opposition; recover; energy; operating; automatically; circuit including; diode arrays; inductive load; desired level; dc power; power supply; diode array; duty cycle; load current; switching rate; bridge arrangement; servo control; parallel connected; fourth legs; transistor switch; rate set; /323/363/

Citation Formats

Dyer, George R. DC switching regulated power supply for driving an inductive load. United States: N. p., 1986. Web.
Dyer, George R. DC switching regulated power supply for driving an inductive load. United States.
Dyer, George R. Wed . "DC switching regulated power supply for driving an inductive load". United States. https://www.osti.gov/servlets/purl/865830.
@article{osti_865830,
title = {DC switching regulated power supply for driving an inductive load},
author = {Dyer, George R.},
abstractNote = {A power supply for driving an inductive load current from a dc power supply hrough a regulator circuit including a bridge arrangement of diodes and switching transistors controlled by a servo controller which regulates switching in response to the load current to maintain a selected load current. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. The regulator may be operated in three "stages" or modes: (1) For current runup in the load, both first and second transistor switch arrays are turned "on" and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned "off", and load current "flywheels" through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays "off", allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load. The three operating states are controlled automatically by the controller.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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