JP2663489B2 - Power control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power supply control device, and more particularly to a power supply control device suitable for simultaneously turning on and off the power of a plurality of devices in an information processing device or the like.

(Prior Art) Conventionally, in this type of power control, when a plurality of power supplies are controlled simultaneously, each power supply is turned on and off by a control circuit other than a power supply control device belonging to each power supply. The power supply is controlled so that the power supply of each device connected in series is turned on and off in order from the power supply of the highest-order device in accordance with the order in which the devices are connected.

(Problem to be Solved by the Invention) The above-described conventional power supply control device requires a control circuit other than the power supply belonging to the device when the power is to be turned on and off by an arbitrary method in a system. Therefore, since the devices using these power supplies have a circuit for controlling the power-on and power-off of the lower-level device in the higher-level device, it is necessary to distinguish between the upper-level and lower-level power sources, and There is a problem that power cannot be allocated with the power supply.

The present invention solves such a problem, and configures a power supply control circuit included in a power supply used simultaneously with the same circuit,
An object of the present invention is to provide a power supply control device that enables the same power supply to be used without distinction between a higher-order device and a lower-order device, and that can be set as a power supply for a higher-order device or a power supply for a lower-order device by a simple operation.

(Means for Solving the Problems) In order to achieve the above object, a power supply control device according to the present invention is provided in each of the plurality of power supplies 1a, 1b,. In a power supply control device configured by connecting power supply control circuits 2, 2,... 2 for turning on and off in series, each power supply control circuit 2, 2,. .. An individual circuit 15 for controlling 1x power supply, a main circuit 14 for controlling each part in the power control circuit 2 (2a, 2b) based on a power control signal of a power-on signal 21 or a power-off signal 22; When the main switch 5 for sending a power control signal to the circuit 14 and the power control circuit 2 (2a) are connected to the host device 8 outside the power sources 1a, 1b,..., 1x, power control is performed from the host device 8. , Or power supply 1a, 1b, ... 1x The power control signal from the main switch 14 is selected and output from the power supply control circuit 2 and the host device 8 connected in series and connected via the main circuit 14 under the control of the switching switch 9 and the main circuit 14. Select circuit 16
When the power supply control circuit 2 is connected to the last stage, the power supply control signal is terminated and turned over, and the power switch-on signal 21 is operated by the power-on signal 21 to hold the state by its own contact circuit and to turn off the power. When a power supply control circuit of the same type is connected at a subsequent stage, a power supply control signal selected by the select circuit 16 is provided to the power supply control circuit 2 at the subsequent stage. When the power supply control circuit 2 is at the last stage, the power supply control circuit 2 is turned back by the terminal switch 11 of the own circuit, and the main circuit is turned on by the turned back power supply control signal.
When the same type of power control circuit 2 is connected to the previous stage while the power is turned on or off by operating the individual circuit 15 and the individual circuit 15, the power control signal is sent to the previous power control circuit 2, The power supply control circuit 2 performs the same operation, so that the higher-level device 8 and any one of the plurality of power supplies 1a, 1b,.
…… It is configured so that power can be turned on and off for all 1x.

(Example) Next, the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory diagram showing the concept of one embodiment of the present invention.

FIG. 2 is a circuit diagram showing an example in which two units of the embodiment shown in FIG. 1 are connected in series and a higher-level device is further connected.

As shown in FIG. 1, the power supply control device of this embodiment is constituted by power supply control circuits 2, 2,... 2, and power supplies 1a, 1b,. 1x is used by being built in each. And one power control circuit 2
Of the power supply control circuit 2 of the same kind as the power supply control circuit 2 of the next kind, and the power supply control circuits are connected in series in the same manner.

Each of the power supply control circuits 2, 2,... 2 includes, in addition to the transmission connector 4 and the power receiving connector 3, a power receiving connector 6 for a higher-level device for connecting to a higher-level device when connected to the power source. And a main switch 5 for each power supply control device.
have.

In FIG. 2, power supply control circuits 2a and 2b correspond to the power supply control circuit 2 in FIG. 1, and are constituted by exactly the same circuit.

Inside the power supply control circuits 2a and 2b, in addition to the main switch 5, a higher-order switch 9 and a remote switch 1 are provided.
0, a terminating switch 11, a relay 12, a main circuit 14, an individual circuit 15, a select circuit 16, and a gate circuit 17.

 Next, usage and operation will be described.

First, a case where the host device 8 is connected to the present embodiment will be described.

The upper-level switching switch 9 and the remote switch 10 of the power supply control circuit 2a (hereinafter, referred to as a first control circuit) and the power supply control circuit 2b (hereinafter, referred to as a second control circuit) are set to the ON side.
Set. In addition, the terminal switch 11 is set ON only for the lowest power supply control device (only the second control circuit 2b in the case of FIG. 2).

The host device 8 has a power-on switch 18, a power-off switch 19, and an emergency-off switch 20.

When turning on the power, the power-on switch 18 of the host device 8 is turned on. Since the ground signal input to the host device 8 via the host device power receiving connector 6 is input to the common terminal of the power-on switch via the emergency switch 20 and the power-off switch 19, the ground signal is turned on. The signal is input to the select circuit 16 via the normally-on terminal of the power-on switch 18 and the host device power receiving connector 6 as a signal. Power-on signal for select circuit 16
21 is connected to the output terminal A, and a gate circuit (OR circuit) 17
Through the transmission connector 4 and the power receiving connector 3 and input to the select circuit 16 of the second control circuit 2b. The power-on signal 21 connected to the output terminal A of the select circuit 16 passes through the gate circuit (OR circuit) 17, the normally-on terminal (ON) of the termination switch (upper side) 11, and the relay 12 of the second control circuit 2b. Input to the minus terminal. This allows relay 12
Work, self-holding contacts r1 ₂ provided in the second control circuit 2b is O
Switch to N.

The power-on signal 21 having passed through the termination switch 11 returns to the first control circuit 2a via the power receiving connector 3 and the sending connector 4, and the relay 12 of the first control circuit 2a operates in the same manner.

Once contact r1 ₂ is a contact for each relay 12 which is turned on to self-hold. That is, the output terminal B of the selector circuit 16 of the second control circuit 2b are outputted ground signal, the ground signal, through the normal on-terminal end switch (bottom) 11, a further contact r1 ₂ Since the signal passes through and is input to one terminal of the relay 12 of the second control circuit 2b, the ON operation of the relay 12 is maintained. Similarly, the second control circuit 2b
The ground signal of the output terminal B of the select circuit 16 is input to the relay 12 of the first control circuit 2a, and the ON operation of the relay 12 is also maintained.

When the relays 12 of the first and second control circuits operate, the main circuits 14 and 14 are turned on, and the individual circuits 15 and 15 are also turned on.

To turn off the power, the power-off switch 19 of the host device 8 is turned off. Since the ground signal input to the select circuit 16 of the first control circuit 2a via the host device power receiving connector 6 is cut off, the ground signal output from the output terminal B of the select circuit 16 becomes high level. .
That is, a high-level power-off signal 22 is output from the output terminal B of the select circuit 16, and is input to the select circuit 16 of the second control circuit 2b via the transmitting connector 4 and the power receiving connector 3. The power-off signal 22 connected to the output terminal B of the select circuit 16 passes through the normally-on terminal of the termination switch (lower side), and further contacts the first and second control circuits 2a and 2b.
To enter through the 1 _2, r1 ₂ to the negative terminal of each relay 12, 12, each relay 12, 12 is turned off. The main circuits 14, 14 and the individual circuits 15, 15 are turned off by the off operation of the relays 12, 12.

Contacts r1 ₃ is intended for passing a disconnect signal in an emergency disconnection.

Next, when an abnormality occurs in the power supply control device 2, the emergency disconnection switch 20 of the host device 8 is turned off. By turning off the emergency disconnect switch 20 for grounding the signal is disconnected, the first and second control circuits 2a, via 2b contacts r1 _3, r1 _3, more in each of the main circuits 14 and 14 through a remote switch 10, 10 Since the input ground signal goes high, the main circuits 14, 14 are immediately disconnected regardless of other circuit conditions.

Next, when only the power control devices 2 and 2 are connected in series without connecting the host device 8, the first control circuit 2a and the second
The high-order switching switch 9 of the control circuit 2b is set to the OFF side, the remote switch 10 is set to the ON side, and the terminal switch 11 is set to the lowest power supply control circuit only (only the second control circuit 2b in FIG. 2). Set to.

Then, turn on the main switch 5 of any power supply control circuit.
, The main circuit 14 is turned on, and the individual circuit 15 is also turned on, so that power is supplied to each power supply.

At this time, since the output of the main circuit 14 is input to the gate circuit 17, it is transmitted to the output of the gate circuit 17, and the terminal switch 11 of the lowest power supply control circuit 2 (the second control circuit 2b in FIG. 2). The power supply is also turned on for the other power supply control circuits 2 which have not operated the main switch 5 by operating the relays 12 of the respective control circuits through the contacts of.

On the other hand, when the main switch 5 of the power supply control circuit 2 that has been turned on is turned off, the main circuit 14 connected to the main switch 5 sends a disconnection signal to the select circuit 16, and the select circuit 16 performs a selection operation. Since the disconnection signal is transmitted from the select circuit 16, the relay 12 of each control circuit is disconnected in the same manner as when the host device 8 is connected. When the relay 12 is disconnected, the main circuit 14 is disconnected, the individual circuits 15 are disconnected, and all the power supplies are disconnected.

In this embodiment, when it is desired to turn on / off the power of each power supply control circuit 2 individually, the remote switch 10 is set to the OFF side, and the power is turned on / off by the main switch 5. It's getting better. Since the remote switch 10 is OFF, the main circuit 14 does not output a signal for operating the relay 12 of another power supply control circuit.

(Effects of the Invention) As described above, the power supply control device of the present invention converts the power-on signal and the power-off signal from the host in each power supply control circuit connected in series to the conditions under which the power supply control circuit is set. Select the input path according to the selection circuit,
By turning these power-on and power-off signals back at the terminal switch of the power supply control circuit at the bottom, and then turning on or off the power at each stage, the power supply control circuit can use the same power supply control circuit. Even if the power supply is turned on and off from the control circuit or the host device, each power supply can be turned on and off at the same time.
The power supply using this power supply control device has the effect that it is not necessary to distinguish between upper and lower power supplies. Therefore, when this embodiment is used, the upper device and the lower device can be easily set.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing the concept of one embodiment of the present invention. FIG. 2 is a circuit diagram showing an example in which two units of the embodiment of FIG. 1 are connected in series and a higher-level device is connected. 1a, 1b, 1x Power source 2, 2a, 2b Power control circuit 3 Power receiving connector 4 Sending connector 5 Main switch 6 Power receiving connector for host device 8 Host device 9 ... Higher-level device switching switch 10 ... Remote switch 11 ... Terminal switch 12 ... Relay 14 ... Main circuit 15 ... Individual circuit 16 ... Select circuit 17 ... Gate circuit 18 ... Power-on switch 19 ... Power supply Disconnect switch 20 Emergency switch 21 Power-on signal 22 Power-off signal

Claims (1)

(57) [Claims] A power supply control device provided in each of power supplies inside a plurality of power supplies used at the same time and configured to serially connect a power supply control circuit for controlling turning on and off of the power supply. A power supply control circuit, an individual circuit for controlling the power supply of each power supply, a main circuit for controlling each unit in the power supply control circuit based on a power supply control signal such as a power-on signal or a power-off signal, and A main switch for transmitting the power control signal, and a higher-level switch for selecting whether to control the power supply from the higher-level device or the power supply itself when the power-supply control circuit is connected to a higher-level device external to the power supply. A changeover switch, which is controlled by the main circuit, is connected in series with a preceding power supply control circuit, and is connected to the host device via the main circuit. A select circuit for selecting and outputting a power control signal from the main switch, a terminating switch for terminating and turning off the power control signal when the power control circuit is connected to the final stage, A relay which operates and maintains its state by its own contact circuit, and is released from the state by the power-off signal, is selected by the select circuit when a power supply control circuit of the same type is connected at a subsequent stage. The power supply control signal is sent to the power supply control circuit of the subsequent stage, and when the power supply control circuit is the last stage, the main circuit and the individual circuit are operated by the folded power supply control signal. When the same type of power control circuit is connected to the previous stage, the power control signal and the power control of the previous stage are connected. The power supply control circuit sends the same operation to the preceding power supply control circuit, so that power can be turned on and off from all of the power supplies from the host device and any one of the plurality of power supplies. A power supply control device characterized in that: