JP2797221B2 - Power supply start / stop circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] Start-up in N + 1 redundant power supplies,
Regarding the circuit that performs the shutdown, all the power supplies can be started at the same time at the time of startup, and when one power supply is stopped, the other N units can be operated continuously, and two or more power supplies can be used. When stopped, all power can be stopped,
The purpose of the present invention is to provide a power supply start / stop circuit.In a plurality of power supplies having a power supply circuit that receives a power supply input and supplies an output to a common load, a normal operation signal is generated when the power supply circuit is normal and a failure occurs when a failure occurs. An alarm circuit for generating an alarm signal, a start circuit for starting a power supply circuit when receiving a start signal and a normal operation signal, and a comparison for generating an output when receiving an alarm signal and an alarm signal of any other device. A circuit and a loop circuit that is turned off when the output of the comparison circuit is received and turned on at other times is provided for each power supply, and a start signal is sequentially passed through a loop circuit of a plurality of power supplies in series, and then the power supply is turned on at each power supply. It is configured by connecting so as to give as a start signal.

[Industrial applications]

The present invention relates to a power supply start / stop circuit, and more particularly to a power supply start / stop circuit for starting / stopping N + 1 redundant power supplies.

In many cases, the power supply used for a device such as an exchange has a margin for one load with respect to the load so that the device can continue operating even if the power supply stops due to a failure. However, even if one power supply stops, sufficient power supply to the apparatus can be continued.

In recent years, in response to demands for downsizing of power supplies, a method has been adopted in which a plurality of small power supplies are distributed to one load and mounted on an apparatus.

For these reasons, a power supply generally has N + 1 redundant configurations.

A power supply having such a redundant configuration of N + 1 units includes:
Simultaneous startup can be performed, and even if one power supply stops, power supply can be continued without affecting other normal power supplies, and when two or more power supplies stop, It is desired that the entire power supply can be stopped.

[Conventional technology]

Power supplies having a conventional redundant configuration are simultaneously activated by a loop circuit or the like, and each power supply individually performs stoppage. In addition, each power supply is individually stopped in the event of a failure.

[Problems to be solved by the invention]

In a conventional power supply having a redundant configuration, when two or more power supplies are stopped, the other normal power supplies bear a load higher than the rated power supply, and stop as an overload failure.
This causes all power supplies to fail and shut down. In this case, which power supply really failed,
It becomes indistinguishable.

In addition, if two or more power supplies are accidentally cut off when the power supply is replaced for periodic maintenance, etc., the operating power supply will be forced to exceed the rated load, resulting in an overload fault. And it stops. In this case as well, there is a risk that the power supply may be mistaken for a failure regardless of the normal power supply.

The present invention is intended to solve such a problem of the related art. In the (N + 1) redundant power supplies, all the power supplies can be started simultaneously at the time of starting, and one power supply can be used. It is an object of the present invention to provide a power supply start / stop circuit capable of continuously operating other N units when stopped, and stopping all power supplies when two or more power supplies are stopped. The purpose is.

[Means for solving the problem]

 FIG. 1 shows the principle configuration of the present invention.

That is, the present invention provides an alarm circuit (2) in each of a plurality of power supplies having a power supply circuit (1) that receives a power supply input and supplies an output to a common load, so that the power supply circuit (1) operates normally. In this case, a normal operation signal is generated and an alarm signal is generated at the time of failure, and a starting circuit (3) is provided.
The power supply circuit (1) is activated when receiving the activation signal and the normal operation signal, and a comparison circuit (4) is provided to generate an output when receiving this alarm signal and an alarm signal of any other device. A loop circuit (5) which is turned off when the output of the comparison circuit (4) is received and turned on otherwise is provided, and a start signal is sequentially connected to a plurality of power supply loop circuits (5) in series. After passing through, they are connected so as to be given as a start signal in each power supply.

Further, according to the present invention, in each of a plurality of power supplies having a power supply circuit (1) that receives a power supply input and supplies an output to a common load, an on / off circuit (6) is provided, and the power supply circuit (1) is provided. A start-up circuit (3) is provided to generate a turn-on signal when the switch-on state and a cut-off signal when the switch-off state is established, and to start the power supply circuit (1) when receiving the start-up signal and the turn-on signal. A circuit (4) is provided to generate an output when receiving the disconnection signal and a disconnection signal from any other device, and to turn off when receiving the output of the comparison circuit (4), and to turn on otherwise. A loop circuit (5) is provided, and the start signal is connected to the loop circuit (5) of a plurality of power supplies in sequence, and then supplied as a start signal for each power supply.

Further, according to the present invention, an alarm circuit (2) is provided in each of a plurality of power supplies having a power supply circuit (1) that receives a power supply input and supplies an output to a common load, so that the power supply circuit (1) operates normally. In this case, a normal operation signal is generated and an alarm signal is generated in the event of a failure. An ON / OFF circuit (6) is provided to generate an ON signal when the power supply circuit (1) is ON and to output a OFF signal when the power supply circuit (1) is disconnected. The power supply circuit (1) is activated when it generates and receives a start signal, this normal operation signal, and a turn-on signal, and a comparison circuit (4) is provided to receive the alarm signal or disconnection. A loop circuit (5) that generates an output when it receives a signal and an alarm signal or disconnection signal from any other device, turns off when it receives the output of the comparison circuit (4), and turns on otherwise. And start signal Which are connected to provide a start signal in each power after passing through loop circuit a plurality of power supply (5) sequentially in series.

[Action]

In each of a plurality of power supplies having a power supply circuit that receives a power supply input and supplies an output to a common load, a normal operation signal is generated when the power supply circuit is normal, a fault alarm signal is generated, and a start signal and The power supply circuit is activated when the normal operation signal is received, an output is generated when the alarm signal and an alarm signal of any other device are received, and the output is turned off when the output is received, and otherwise. A loop circuit that is turned on is provided, and a start signal is given as a start signal in each power supply after sequentially passing through a loop circuit of a plurality of power supplies in series. Therefore, in N + 1 redundant power supplies, At the time of startup, all power supplies can be started at the same time, and if one power supply stops due to a failure, the other N units can be operated continuously, And, when the power of the two or more stops at failure can stop all power.

Also, in each of a plurality of power supplies having a power supply circuit that receives a power input and supplies an output to a common load, a power-on signal is generated when the power supply circuit is turned on and a disconnection signal is generated when the power supply circuit is turned off. The power supply circuit is activated when it receives the activation signal and this turn-on signal, generates an output when it receives this disconnection signal and a disconnection signal of any other device, and turns off when it receives this output. In other cases, a loop circuit that is turned on when other than the above is provided, and the start signal is sequentially passed through the loop circuits of a plurality of power supplies in series and then given as the start signal in each power supply, so that N + 1 redundant configurations are provided. In the power supply, all the power supplies can be started at the same time at the time of starting, and when one power supply is cut off, the other N units can be operated continuously. Can also when the power of two or more is disconnected, it is possible to stop all power.

Further, in each of a plurality of power supplies having a power supply circuit that receives a power supply input and supplies an output to a common load, a normal operation signal is generated when the power supply circuit is normal and an alarm signal is generated when a failure occurs, and When the circuit is in the ON state, an ON signal is generated, and when the circuit is in the OFF state, a disconnection signal is generated.When the start signal, the normal operation signal, and the ON signal are received, the power supply circuit is activated. A loop circuit that generates an output when receiving an alarm signal or a disconnection signal from any of the other devices and that is turned off when the output is received and turned on at other times is provided. The power supply loop circuits are sequentially passed in series and then given as a start signal for each power supply. Sometimes all power supplies can be started at the same time, and if one power supply stops due to a failure or is cut off, the other N units can continue to operate, and two or more If any of the power supplies is stopped due to a failure or is disconnected, all power supplies can be stopped.

〔Example〕

FIG. 2 is a view showing a first embodiment of the present invention.
Is a power circuit, 12 is a loop circuit for forming a loop with another power circuit, 13 is an alarm signal when a power failure occurs,
Alarm circuit that sends a normal operation signal when the power supply is normal, 14, 15
Is an AND circuit that performs a logical product operation, and 16 is a starting circuit that starts the power supply circuit 11 when receiving a signal.

FIG. 3 illustrates a redundant configuration of a power supply,
The case of a configuration of 3 + 1 units by the power supplies # 1 to # 4 is illustrated, 21 is a start signal, 22 is a power input, and 23 is a load.

At the time of activation, an activation signal 21 is externally applied to the A terminal of the power supply # 1. Loop circuit 12 of each power supply is A, B when normal
Since the loop between the terminals is closed, the start signal is connected in parallel from the B terminal of the power supply # 4 to the C terminal of each power supply, and is applied to one input of the AND circuit 15 of each power supply. In a normal state, the alarm circuit 13 of each power supply outputs a normal operation signal. Therefore, based on the signal from the AND circuit 15, the activation circuit 16 of each power supply activates each power supply circuit 11. The outputs of the power supplies are connected in parallel and supplied to the load 23.

When one of the power supplies in the redundant configuration, for example, the power supply # 1 stops due to a failure, the power supply # 1 is turned off by an alarm circuit.
It stops the normal operation signal from 13, to generate an alarm signal S ₀ terminal. When the normal operation signal stops, AND
The signal from the circuit 15 stops, and the starting circuit 16 stops the power supply circuit 11.

Other power # 2 to # 4 that does not occur a fault is a warning signal from the power source # 1, which generates a fault is input from the S _i terminals, since the own device is operating normally, alarm Circuit 13
No alarm signal is output from. Therefore, the AND circuit 14 does not generate an output, the loop circuit 12 keeps the terminals A and B closed, the AND circuit 15 continuously generates a signal, and the respective power supply circuits 11 continue generating the output.

When the further power supply for example, a power supply # 2 of the other one has failed, the alarm signal from the power supply # 2 may alarm circuit 13 outputs to the S ₀ terminal, so to stop the normal operation signal,
The power supply circuit 11 is stopped via the activation circuit 16.

At this time, the failed power supply # 2 is connected to the power supply # from the _Si terminal.
Since the alarm signal 1 has been received, a signal is output from the AND circuit 14. As a result, the loop circuit 12 opens between the A and B terminals. Therefore, in all the power supplies, the start signal is not applied to the C terminal, and the signal from the AND circuit 15 stops, so that the start circuit 16 stops the power circuit 11.

When one of the plurality of power supplies having the redundant configuration stops due to a failure, the other power supplies can continue to operate normally only by stopping the power supply.

Further, when two or more power supplies are stopped due to a failure, all the power supplies are stopped to prevent an erroneous alarm from being sent to a normal power supply due to an overload.

FIG. 4 shows a second embodiment of the present invention, in which the same elements as those in FIG. 2 are indicated by the same reference numerals, and 17 is a closing / cutting circuit.

The embodiment shown in FIG. 4 also has a redundant configuration as shown in FIG.

At the time of startup, an activation signal 21 is externally applied to the A terminal of the power supply # 1, so that the activation signal is applied to one input of the AND circuit 15 of each power supply in the same manner as described with reference to FIG. In a normal state, the power-on / off circuit 17 of each power supply outputs a power-on signal. Therefore AND circuit 15
The activation circuit 16 of each power supply activates each power supply circuit 11 based on the signal from. The outputs of the power supplies are connected in parallel and supplied to the load 23.

When one of the power supplies in the redundant configuration, for example, the power supply # 1 is turned off, the power supply # 1 is turned on and off by the power on / off circuit 17.
Stops the on signal from, for generating a disconnection signal to the S ₀ terminal. When the input signal is stopped, the signal from the AND circuit 15 is stopped, and the starting circuit 16 stops the power supply circuit 11.

Other power # 2 to # 4 which is not cut, the cutting signal from the power supply # 1 cut but inputted from S _i terminals, since the own device is operating, the cutting signal from the input disconnection circuit 17 Has been stopped. Therefore, the AND circuit 14 does not generate an output,
In the loop circuit 12, the terminals A and B remain closed, and the AND circuit
15 continuously generates a signal, and each power supply circuit 11 continues to generate an output.

If a further cut of another one of the power supply for example power # 2 outputs the disconnection signal to the S ₀ terminal from the power supply # 2 also turned off circuit 17, since the stop-on signal, via the starting circuit 16 The power supply circuit 11 is stopped.

Since the power supply # 2 disconnected at this time receives the disconnection signal of the power supply # 1 from the _Si terminal, a signal is output from the AND circuit 14. As a result, the loop circuit 12 opens between the A and B terminals. Therefore, in all the power supplies, the start signal is not applied to the C terminal, and the signal from the AND circuit 15 stops, so that the start circuit 16 stops the power circuit 11.

When one of a plurality of power supplies having a redundant configuration is cut off, only the power supply is stopped, and the other power supplies continue to operate normally.

Further, when two or more power supplies are cut off, all the power supplies are stopped to prevent an erroneous alarm of a normal power supply from being transmitted due to an overload.

FIG. 5 shows a third embodiment of the present invention, in which the same elements as those in FIGS. 2 and 4 are indicated by the same reference numerals, and 18 is an OR circuit.

The embodiment shown in FIG. 5 has a redundant configuration as shown in FIG. 3, and has an alarm circuit 13 and an ON / OFF circuit 17, and an alarm signal from the alarm circuit 13 and ON / OFF taking the logical sum of the disconnect signal from the circuit 17 via the OR circuit 18 receives an input of the aND circuit 14, and output to the other power supply from the S ₀ terminal, a normal operation signal from the alarm circuit 13,
The input signal from the input / output circuit 17 and the start signal from the C terminal are input to the AND circuit 15, and the start circuit 16 is operated by the signal obtained by ANDing the signals. The function of the example and the function of the embodiment of FIG. 4 are combined.

FIG. 6 shows a specific configuration example of the present invention, corresponding to the embodiment shown in FIG. 5, and exemplifying a case of a 2 + 1 configuration with power supplies # 1 to # 3. .

In FIG. 6, K0 and K1 are relays, and k0 and k1 are relays K0 and K.
Contact 1 is AL, a relay that operates when a power failure occurs, and al0 to al2 are contacts of the relay AL. SW0 to SW2 are power-on / off switches, and have an interlocking structure.

During inoperative, S ₀ terminal in each supply voltage V _i
Has been given, hence given the S _i terminals the voltage V _i relay K0 is in operating state, A, between the B terminal open relay K1 is inoperative, the contact k1 is open.

When starting up the power supplies, the switches SW0 to SW2 of each power supply are turned on. When the switch SW0~SW2 of each power supply is all turned, since S ₀ terminals in each power supply is released from the voltage V _i, S _i terminal is released from the voltage V _i, thus the relay K0 will become inoperative Then, the contact k0 is closed. All A,
When between B terminal is closed, the voltage V _i is applied to the C terminal of the full power, relay K1 is operated contacts k1 is closed. At this time relay AL is not operating, contact al0 also closed, thus V _i is started is applied to the power supply circuit 11.

When the power of the one now is or cut to generate a fault, the power supply sends out a voltage V _i to the S ₀ terminal, since the contact al0 or switch SW0 is open, the power supply circuit 11
Stops. In this case, the other power supply voltage to the S _i terminal V _i
However, since the contact al2 or the switch SW2 of the own device is open, the relay K0 does not operate, and therefore, the contact k0 remains closed, and the power other than the failed or disconnected power supply does not stop.

When yet another one power is or cut to generate a fault, the power supply sends out a voltage V _i to the S ₀ terminal, will open the contact al0 or switch SW0, the power supply circuit 11 is stopped . At the same time, and has been added voltage V _i from the power source already failure or cut to S _i terminals, since the contact al2 or switch SW2 is closed, and operates relay K0 is, contact k0 is opened The terminals A and B are open. Thus, C terminal of the full power loses voltage V _i,
Since the relay K1 of all power supplies becomes inactive and opens the contact k1,
All power shuts down.

〔The invention's effect〕

As described above, according to the present invention, the redundant power supplies can be started collectively, and when one power supply is stopped, the other N power supplies can be operated continuously. When the above power supply stops, all the power supplies can be stopped without affecting the normal power supply circuit.

Therefore, even if two or more power supplies stop due to a failure, the normal power supply is not affected at all. It is also possible to replace only one power supply by disconnecting it. At this time, even if two or more power supplies are accidentally stopped, the other power supplies will not be abnormally stopped due to overload.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention, FIG. 2 is a diagram showing a first embodiment of the present invention, FIG. 3 is a diagram illustrating a redundant configuration of a power supply, and FIG. FIG. 5 is a diagram showing a second embodiment, FIG. 5 is a diagram showing a third embodiment of the present invention, and FIG. 6 is a diagram showing a specific configuration example of the present invention. 1 is a power supply circuit, 2 is an alarm circuit, 3 is a start circuit, 4 is a comparison circuit, 5 is a loop circuit, and 6 is an on / off circuit.

Claims (3)

(57) [Claims] 1. A plurality of power supplies having a power supply circuit (1) for receiving a power supply input and supplying an output to a common load, a normal operation signal is generated when the power supply circuit (1) is normal, and an alarm is issued when a failure occurs. An alarm circuit (2) for generating a signal; an activation circuit (3) for activating the power supply circuit (1) when the activation signal and the normal operation signal are received; and an alarm for the alarm signal and any other device. A comparison circuit (4) that generates an output when receiving a signal, and a loop circuit (5) that is turned off when the output of the comparison circuit (4) is received and turned on otherwise. A power supply start / stop circuit, characterized in that a start signal is sequentially passed through the plurality of power supply loop circuits (5) in series and connected so as to be given as the start signal in each power supply. 2. A plurality of power supplies having a power supply circuit (1) for receiving a power supply input and supplying an output to a common load, wherein a power-on signal is generated when the power supply circuit (1) is in a power-on state, and the power supply circuit (1) is turned off. Closing circuit for generating disconnection signal when (6)
An activation circuit (3) for activating the power supply circuit (1) when receiving the activation signal and the input signal; and generating an output when receiving the disconnection signal and a disconnection signal of any other device. Each power supply is provided with a comparison circuit (4) and a loop circuit (5) which is turned off when an output of the comparison circuit (4) is received and turned on otherwise, and a start signal is supplied to each of the plurality of power supplies. A power supply start / stop circuit, wherein the power supply start / stop circuit is connected so as to sequentially pass through a loop circuit (5) in series and to supply the start signal for each power supply. 3. A plurality of power supplies having a power supply circuit (1) receiving a power input and supplying an output to a common load, comprising: a power supply circuit (1) receiving a power input and supplying an output to a common load. An alarm circuit (2) that generates a normal operation signal when the power supply circuit (1) is normal and generates an alarm signal when a failure occurs, and generates an ON signal when the power supply circuit (1) is ON and disconnects when the power supply circuit (1) is disconnected An on / off circuit (6) for generating a signal; an activation circuit (3) for activating the power supply circuit (1) when receiving the activation signal, the normal operation signal and the activation signal; A comparison circuit (4) for generating an output when receiving an alarm signal or a disconnection signal from any other device; and a loop circuit for turning off when receiving the output of the comparison circuit (4) and turning on otherwise. (5) for each power supply, for starting A power supply start / stop circuit characterized in that a signal is sequentially connected through a loop circuit (5) of the plurality of power supplies and then supplied as the start signal in each power supply.