JPS62188120A - Automatic source multiplexer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic power supply multiplexing device, and more particularly to an automatic power supply multiplexing device that switches a plurality of sets of power supply lines and connects them to a load in a physical manner.

[Conventional technology]

In complex information equipment such as combinators, various measures have been taken to improve the reliability of the system, such as multiplexing the main circuits and providing duplicates on important equipment. The multiplexing of sources is also one of the most effective techniques. In particular, multiplexing of power supplies such as cooling fans installed inside devices greatly contributes to improving the reliability of the system, since the cooling fans are essential for system operation.

As a multiplexing device having such a function, there is an automatic power supply multiplexing device that automatically switches a plurality of power lines and connects them to a load.

That is, in the conventional automatic power supply multiplexing device, L shown in FIG.
When switching between two sets of power supplies El and E2t, it is composed of two relays RL5 and RLs and three contacts each. Relay RL5 has a contact rtst-, and L/-RL51j has a contact rt6t-.

The power supply El and the coil of relay RL5 are connected to the relay RL.
The break contacts 55 of the relay RL6 are connected in series, and the break contacts 56 of the coil machining relay RL5 of the relay RL6 are connected in series to the power source E2. Then, the make contacts 51 and 52 of the relay RL5 are inserted into the load side of the above-mentioned relay circuit with respect to the power supply El, and the make contacts 53 and 2 of the relay RL6 are inserted into the load side of the above-mentioned relay circuit with respect to the power supply E2. and 54 are charged. Therefore, when the relay connected to either the power source El or E2 is off, the relay connected to the other power source operates and connects it to the load 20, and the power source E1 and E2 will not be short-circuited. do not have.

[Problem that the invention seeks to solve]

In the above-mentioned automatic power supply multiplexing system @50, power supplies El and E2 were both interrupted, and when they were restored at the same time, RL5 and R, L 5d were turned on at the same time, albeit for a short time, and power supplies E1 and E2 were turned on at the same time. Work E2t - May cause short circuit. If such a short circuit occurs, the contacts of each relay will burn out, which is a drawback.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic power supply multiplexing device which avoids the above-mentioned drawbacks by configuring a relay circuit so that even if a plurality of sets of power supplies are turned on at the same time, they do not short-circuit each other. be.

[Means for solving problems]

Automatic power supply multiplexing system of the present invention! Ill is n groups (n≧2)
In an automatic power supply multiplexing device in which a coil of a relay is connected to each of the n sets of power supply lines in order to connect one set of the power supply lines to a load, the mth set (l≦m≦n) of the The relay connected to the power line connects the make contact to the power line of the m-th group, and connects the make contact to the power line of the mth group. All power lines except group m have break contacts.

The coils of the relays connected to the 1[m groups of power supply lines are connected to the load side, and the break contacts of the relays connected to the 1st to m-1 groups of power supply lines are also connected to the load side, and The coil of the relay connected to the power line is the make contact of the relay connected to the power line of the m-th group, and the break contact of the relay connected to the power line of group m+1 to n is also on the power supply side @m+1.
It is connected in series with the break contact of the relay connected to the ~n set of power supply wires, and the m-th power supply line of the n-n set of IM power supply wires is connected to W, and the m-th power supply wire is supplied with power. The power supply line is connected to the load as long as possible, and all of the first to m-1 sets of power supply lines and the m+l-n sets of power supply lines are not connected to the load.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The first factor is a circuit diagram showing an embodiment of the present invention.

In FIG. 1, an automatic power supply multiplexing device 10 has a function of switching between power supplies El and E2 and automatically connecting them to a load 20. In FIG.

Relays R and Lt constitute a series circuit together with break contact 19 of relay RL2, and the entire circuit is connected to power source E1. rtl, rt2 tic each relay RLt
, RLz. Make contact 1 of relay B, Lt
The connection point Pi of the series circuit between the relay RIL1 and the break contact 19 of the relay RL2 is inserted into the load side of the relay RIL1 and the break contact 19 of the relay RL2. Break contacts 13 and 14 of relay RLl are inserted into source E2.

Relays R and L2 are connected to power supply E2, and the connection point P2 is the break contact 13 of relay = R, L s.
It is on the load side with respect to the 4-mill 4% source E2. Relay 1 (,
The meter contact 17 of L2 and the connection point P2 of relay RL2 are also inserted on the load side. Also, relay R
The break contact 15 and 16 of L2 are inserted into the power source E1, and the connection point P1 of relay RLt is also provided on the load side.

The power supplies E1 and E2 are condensed at a connection point P3 and connected to a load 20.

In such a configuration, when power supply E1 and power supply E2 both resume power supply at the same time from the power supply stop state, relay RL
Power is supplied to the load 20 from the power source to which the relay with the shortest operation time among I and RL2 is connected. That is, if the operating times of relays R and Lt are shorter than those of relays R and L2, make contacts 11 and 121 of relay RLI are made and power is supplied from power source E1 to load 20. Also, break contact 13 of relay RLI
and 14t-break, relay RL2t-power supply E
At this time, make contact 17 of relay RL2
Since the power supply G1 has not been made, the power supply G1 has not been made.
2 will not be short-circuited, and conversely, if the operating time of relay RL2 is shorter than the operating time of relay RL1, c.
Make contacts 17 and 18 of relay RL2 are made to supply power from power source E2 to load 20, and break contacts 15 and 16 of relay RL2 are broken to disconnect load 204-[from source E1. -t,! :(!:
Also break the break contact 19t of K and RL2 to disconnect the relay RL1 from the sound power source E1. At this time, relay R
L1 make contact 11. Since the power supply 12 is not connected, the power supply E1 and the power supply E2 will not be short-circuited.

Also, during the period when relays R and Lt are operating and supplying power from power source El to load 20, relay RLl's break contact 13 and relay RL2H are disconnected from relay RL2H, so power source E2 is Power is supplied to the load 20 from the power source El regardless.

Further, if the power supply E2 is supplying power when the power supply to xfAgt is interrupted, the relay RLI is turned off, so the relay RL2 is turned on via the break contact 13 and 14. Therefore, make contact 17 of relay FLL2
8 is made and connected to the power source E2i load 20.

At this time, even if the power supply El, whose power supply had been interrupted, recovers and resumes power supply, the break contact 19 of the relay RL2 is closed, and the power supply E1 and the relay RLt are disconnected, so the power supply E1
Power is supplied to the load 20 from the power source E2 regardless of the current condition.

Furthermore, when switching the connection between the load 20 and the power supply, the load 20
Although there is a short time when the load 20 is not connected to any power source, as can be seen from the previous explanation, the number of times the connection between the load 20 and the power source is switched is also kept to a minimum.

In the five embodiments, the case where there are two sets of power supplies has been described, but even if there are three or more sets, the automatic power supply multiplexing device can be realized in the same manner as described above.

〔Effect of the invention〕

As described above, the automatic power supply multiplexing device of the present invention can automatically switch multiple sets of power supplies without short-circuiting each other and connect one of them to the entire load, and furthermore, the automatic power supply multiplexing device of the present invention can connect one of them to the entire load without causing a momentary power outage to the load. This has the effect of minimizing the number of switching operations.

Further, since there is no need to add a relay compared to the conventional automatic power supply multiplexing system rIt of the present invention, there is also the effect that a safe and highly reliable device can be obtained without increasing manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an automatic power supply multiplexing device according to an embodiment of the present invention, and the second factor is a circuit diagram showing a conventional automatic power supply multiplexing device. lO...Automatic power multiplexing device, 20...
・Load, RL1~RL2−”−*・sv +, r
t1-・-・-Rev-RLI contact, r12...
...Relay RL2 contact. Agent Patent Attorney Uchihara Uchihara Figure 1 io --- 1 Automatic Denshi! ? , strut formation M, 1-shaku 11-shaku L2----Relay r deficiency 1----Contact point rA2----Tsure-RL 2 Noi@ Point El, E2
--- Source No. 2 Figure 5O --- Ippaku Power Supply 5 ships bundle! RL5. RL6---Relay TI! 5----Rele RL5's protection point rlb----Tsure-RL6's! , color El, E2
---One power supply

Claims (1)

[Claims] In an automatic power supply multiplexing device in which one relay coil is connected to each of the n sets of power supply lines in order to connect one set of the n sets of power supply lines (n≧2) to a load. , the relay connected to the power supply lines of the mth group (1≦m≦n) has a make contact on the power supply line of the mth group, and a break contact on all the power supply lines except the mth group, and The coils of the relay connected to the power supply line of the mth group are the first to
The coils of the relays that are connected to the load side of the break contacts of each relay connected to the m-1 set of power supply lines and connected to the m-th set of power supply lines are connected to the coils of the relays connected to the m-th set of power supply lines. The m+1 to nth sets are located closer to the power supply side than the make contacts and the break contacts of the relays connected to the m+1 to nth power supply wires.
connected in series with the break contact of the relay connected to the power supply wires of the set, and the power supply wires of the mth group of the first to n groups of power supply wires are connected to the power supply wires of the mth group as long as the power supply wires of the mth group are supplied with power. An automatic power supply multiplexing device connected to a load, and characterized in that all of the first to m-1 sets of power supply lines and the m+1 to n sets of power supply lines are not connected to the load.