DC switching regulated power supply for driving an inductive load
- Norris, TN
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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Number(s):
- US 4585986
- OSTI ID:
- 865830
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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
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