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US 4,045,887 AGranted
Switching regulator control circuit
AssigneeHoneywell Information Systems Inc.
InventorJohn Rawson Nowell
Life of this patent
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Abstract
A control circuit for a switching regulator comprised of silicon controlled rectifiers and inductive reactors is disclosed. The control circuit provides for fault detection and voltage regulation while using these output as control signals for a frequency variable gating mechanism to trigger the switching regulator so as to provide its maximum output capability.
Claims13
A control circuit for a switching regulator utilizing SCR-inductive reactor switching comprising:
- a. timing means connected to the switching regulator for triggering each SCR sequentially at the switching regulators optimal switching rate;
- b. first fault detection means connected to the switching regulator for individually detecting over-voltage, under-voltage and over current faults, and providing inhibit signals to the timing means;
- c. second fault detection means for providing fault signals to a master control panel for shutting down the switching regulator;
- d. fault indication means connected to the fault detection means for individually indicating the type of fault detected;
- and
- e. voltage regulation means connected to the switching regulator output and the timing means for maintaining a desired voltage at the switching regulator output.
3 more elements
The control circuit for a switching regulator composed of a plurality of SCR-inductive reactor pairs, comprising:
- a. timing means for triggering each SCR sequentially, the timing means further comprising:
- a pulse generator;
- gating means connected to the pulse generator for selectively inhibiting pulse generator signals;
- discrimination means connected to the pulse generator for selecting the SCR to be triggered;
- and
- trigger means connected to the discrimination means and to the switching regulator for triggering the SCR selected;
- b. fault detection means for detecting switching regulator faults, the fault detection means further comprising:
- first over-voltage detection means connected to the switching regulator output for monitoring the switching regulator output voltage and providing an over-voltage fault signal when an over-voltage condition is detected;
- second over-voltage detection means connected to the switching regulator output and gating means for inhibiting the pulse generator signals when an over-voltage fault is detected;
- first under-voltage detection means connected to the switching regulator output and providing an under-voltage fault signal when an under-voltage condition is detected;
- second under-voltage detection means connected to the switching regulator output for inhibiting the pulse generator signals when an under-voltage fault is detected;
- over-current detection means connected to the switching regulator for monitoring the switching regulator output current and providing an over-current fault signal and inhibiting the pulse generator when an over-current is detected;
- c. fault indication means connected to and electrically isolated from the first over-voltage detection means, the first under-voltage detection means and the over-current detection means for providing an indication for the type of fault detected, the fault indication means further comprising:
- switch means responsive to nontransient fault signals;
- visual indication means responsive to the switch means for transmitting information on the type of fault detected via the visual white spectra;
- d. voltage regulation means connected to the switching regulator output and the pulse generator for maintaining the desired voltage at the switching regulator output, the voltage regulation means further comprising comparison means comparing the switching regulator output voltage with a reference voltage and providing an error signal proportional to the difference between the two voltages, the error signal being connected to the pulse generator for controlling the frequency of the pulses generated.
13 more elements
Dependencies are inferred from the claim text.