H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/53, 321/76
H02M 3/338 (2006.01)
Patent
CA 1108694
ABSTRACT OF THE DISCLOSURE A power supply provides a low-level DC voltage to DC load circuits by first rectifying the standard AC voltage and thereafter reducing the rectified AC voltage to the low-level DC voltage. The reduction of the rectified AC voltage to the low-level DC voltage is accomplished by a power transformer which is switched on or off by a pair of switching transistors. The switching transistors are operated in a "push-pull" mode by a pair of control transformers operating in combination with a control circuit. The control circuit produces various pulse conditions in the control transformers which turn their respective switching transistors on and off in a prescribed manner. An overcurrent sensing and control device prevents damage to components. The power on/fail circuit signals the load as to the status of the regulated load voltage and guarantees power for orderly shutdown after an input power outage.
292125
Gerding James H.
Heyman Albert M.
Honeywell Information Systems Inc.
Smart & Biggar
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