JPH01270743A - Power source supplying device - Google Patents

Abstract

PURPOSE:To stably supply power to an electronic device by providing a RC filter, a resistor for protecting a diode for connecting a line and isolating a trouble, and a power line in an electronic circuit against a short-circuiting current. CONSTITUTION:Voltage regulators(R) 3, 4 are connected to OR through power buses 1, 2 and diodes (D) 13-16. Accordingly, even if a power bus 1 is interrupted, a trouble is isolated by the Ds 13, 15, and the voltage of a power bus 2 is fed to the Rs 3, 4 through the Ds 14, 16. Electronic circuits 5, 6 are connected to an OR through the Rs 3, 4 and the Ds 17-20. Accordingly, even if the R 3 is malfunctioned so that its output is reduced, a trouble is isolated by the Ds 17, 19, the output voltage of the R4 is supplied to power lines 7, 8 in the circuits 5, 6 through the Ds 18, 20. The short-circuiting currents of ICs 9, 10 are limited by resistors in the RC filters 21, 22 inserted between the lines 7, 8 and the power source pins of the ICs, 9, 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a redundant power supply device for electronic equipment used in a multi-power bus such as one artificial satellite.

[Conventional technology]

FIG. 2 shows a conventional power supply device for electronic devices connected to a multi-power bus.

In FIG. 2, (1) is the first power bus, (2: is the second power bus, (3) is the first voltage regulator, (4:
) is the second voltage regulator, and (5) is the first electronic circuit.

(6) is a second electronic circuit, (7) is a power line in the first electronic circuit, and (8) is a power line in the second electronic circuit.

+91 (IIU IC element, aUZ is a semiconductor element other than IC.

A conventional power supply device will be explained below using FIG. 2.

The voltage regulator <3), (4) converts the voltage of the power bus t11 +21 input to the voltage regulator into a voltage required by the electronic circuit +51 +61 and outputs the voltage. The output voltage of the voltage regulator f31 (41) is supplied to the IC+91αG in the electronic circuit and the semiconductor element (ill (13) through the power supply line (71 (81) in the electronic circuit. As shown in FIG. 2.

The first electronic circuit (5) is powered only through the first power bus (1) and the first voltage regulator (3) f, and the second electronic circuit (6) is powered only through the first power bus (1) and the first voltage regulator (3) f. Power is supplied only through the second power bus (2) and the second voltage regulator (4).

Therefore, the first electronic circuit (5)
A power outage occurs. Alternatively, the first voltage regulator (3) may fail and no longer output voltage. There was a problem in which the power supply was cut off due to any of the following phenomena, resulting in the device not functioning properly. The same can be said of the second electronic circuit (6).

In addition, electronic circuit +51 (in 61, IC (9) (
Since the power terminals of 11 and semiconductor element αn (La are directly connected to the power line (7118+) without using a resistor, when a short-circuit failure occurs in the IC or semiconductor element, the corresponding power line ((7) or (8) )) voltage decreases,
There was a problem that the electronic circuit ((5) or (6)) stopped functioning.

[Problem to be solved by the invention]

In the above conventional multi-power bus power supply device, one power bus power outage, or one voltage regulator failure, or an IC in an electronic circuit.

There is a problem in that the power supply to the electronic device is cut off due to a short-circuit failure of the semiconductor element.

This invention was made to solve such problems, and the problem is that one power bus power outage, one voltage regulator failure, or an IC in an electronic circuit.

It is an object of the present invention to provide a small and lightweight system in which power is stably supplied to an electronic device even if there is a short-circuit failure in a semiconductor element.

[Means to solve the problem]

A redundant power supply device for a multi-power bus according to the present invention connects a first power bus and a second power bus to a first voltage regulator input via a diode, and Also, OR the first power bus and the second power bus through a diode.
The first voltage regulator output and the second voltage regulator output are OR-connected to the power line of the first electronic circuit through a diode, and the first voltage regulator output is also connected to the power line of the second electronic circuit. The voltage regulator output and the second voltage regulator output are OR-connected via a diode, and an RC filter is inserted between the power line in each electronic circuit and the power pin of the IC, and the power supply in each electronic circuit is A resistor is inserted between the line and the semiconductor element.

[Effect]

In this invention, diodes between the power bus and the voltage regulator, and diodes between the voltage regulator and the electronics act as line connections and fault isolation functions, and resistors in the RC filter in each electronic circuit or limits the current in the power supply line when an IC or semiconductor device fails.

〔Example〕

Fig. 1 is an electrical schematic diagram showing an embodiment of the present invention. A diode for connecting the input of the regulator, ση~■ a diode for connecting the output of each voltage regulator and the power line of each electronic circuit, and 2υ4 a diode for connecting the power line and the power supply bin of the IC in each electronic circuit. (c) (2) is a resistor inserted between the power supply line and the semiconductor element.

Next, the operation of the redundant power supply device of the present invention will be explained with reference to FIG.

Voltage regulator (31 (41 is the first power bus).

Since it is OR-connected to the second power bus (2) via the diodes n3 to αG, it outputs the voltage required by the electronic circuit as long as voltage is supplied from at least one of the power buses. For example, even if the first power bus (11) is in a power outage state, the fault is isolated by the diode (13C15), and the voltage of the second power bus (2) is
It is sent to each voltage regulator through αe, and the voltage regulator +3) (4) operates.

Electronic circuit (FSI) (61 is the first voltage regulator (3).

Since it is OR-connected to the second voltage regulator (4) through the diode ~■, as long as at least one voltage regulator is operating, the voltage is applied to the power supply lines (7) and (8) in each electronic circuit. is supplied.

For example, even if the first voltage regulator (3) stops functioning and the output voltage drops, the fault is isolated by the diode aηα value, and the output voltage of the second voltage regulator (4) is Power line (7) in the circuit (supplied to al.

Thus, the first electronic circuit (5) and the second electronic circuit (6) can function together as long as at least one power bus and at least one voltage regulator are operating. Housekeeping equipment (e.g. telemetry command equipment, attitude control equipment) in artificial satellites,
By supplying power in this manner, stable operation can be achieved at all times.

In addition, power lines +71 +81 and IC in each electronic circuit
(The resistor in the RC filter CD (2) inserted between the power supply bins of 91aG can limit the short-circuit current even if a short-circuit failure occurs in the IC.

Furthermore, even if a short-circuit failure occurs in a semiconductor element αυα2 other than an IC, the short-circuit current is similarly limited by the resistor port (c) inserted between the power supply line and the voltage regulator (3) (4). From electronic circuit +51 (6)
Since the current flowing into the voltage regulator (
3) The output voltage of (4) is stable without decreasing.

That is, even if there is a component short-circuit failure in the 1iIt child circuit, the voltage of the power supply line T7) C8) can be kept stable. In addition, the IC (91 (l) is connected to the power bottle of
By connecting C filter t2D(2), I
This not only limits the current when the circuit is short-circuited, but also lowers the impedance at the IC's power supply pin and prevents IC malfunction.

〔Effect of the invention〕

As described above, this invention provides a diode for line connection and fault isolation, and an RC filter that protects a power line in an electronic circuit from short-circuit current.

By providing a resistor, one power bus can be interrupted.

One voltage regulator failure, plus an I in the electronic circuit.
Even if failures of C or semiconductor elements overlap, there is an effect that the power supply lines of the first and second electronic circuits can be kept stable.

Furthermore, by using small components such as diodes, resistors, and capacitors, it is possible to obtain a small, lightweight, and highly reliable power supply device.

[Brief explanation of the drawing]

FIG. 1 is an electrical schematic diagram showing an embodiment of the present invention;
FIG. 2 is an electrical schematic diagram of a conventional power supply device. In the figure, (1) is the first power bus, (2) is the second power bus, (3) is the first voltage regulator, (4) is the second voltage regulator, and (5) is the first power bus. electronic circuit, (
6) is the second electronic circuit, (7) is the power line in the first electronic circuit, (8) is the power line in the second electronic circuit, (
9) al is an IC element, α (13 is a semiconductor element other than IC, 03 to 翰 are diodes for connecting each power bus and the input of each voltage regulator, α force to ω are the output of each voltage regulator and each Diode, 00@Vi, RC filter for connecting the power supply line of the electronic circuit. (To) (To) is the resistance. Note that the same symbols in the two figures indicate the same or equivalent parts.

Claims (1)

[Claims] a first power bus, a second power bus, a first voltage regulator for supplying a regulated voltage to the electronic circuit, a second voltage regulator for supplying the regulated voltage to the electronic circuit, a first power bus; a diode for connecting the bus and the input of the first voltage regulator; a diode for connecting the first power bus and the input of the second voltage regulator;
a diode for connecting a power bus and an input of the first voltage regulator, a diode for connecting a second power bus and an input of the second voltage regulator, a first electronic circuit, a second electronic circuit, a diode connecting the output of the first voltage regulator to the power line in the first electronic circuit; a diode connecting the output of the first voltage regulator to the power line in the second electronic circuit; a diode connecting the output of the voltage regulator to the power line in the first electronic circuit; a diode connecting the power of the second voltage regulator to the power line in the second electronic circuit; and a power source in the first electronic circuit. An RC filter to be inserted between the line and the power pin of the IC, a resistor to be inserted between the power line in the first electronic circuit and the semiconductor element, a power line in the second electronic circuit and the power source of the IC A power supply device comprising: an RC filter inserted between pins; and a resistor inserted between a power line and a semiconductor element in a second electronic circuit.