JP3371283B2 - Power control method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control system, and more particularly to a power supply control system for controlling on / off of power supply of electronic equipment such as a computer.

[0002]

2. Description of the Related Art A conventional power supply control system of this kind is disclosed in, for example, Japanese Patent Laid-Open No. 9-261858, "Computer power supply on / off control system". This conventional technique will be described with reference to the block diagram of FIG.

In the prior art of FIG. 7, the computer 21 includes a CPU 22, a power supply device 23, and a power switch 2.
4, an on / off control circuit 25, a remote / local changeover switch 27, and a self-holding circuit 26. An AC input 35 is input to the power supply device 23 from the outside and a CP
The output (electric power) 28 is supplied to the U22 and the on / off state signal 34 is output to the outside. The on / off control circuit 25 receives a setting condition 29 from the power switch 24 and an on / off request condition 33 from the remote / local changeover switch 27, and outputs an on / off control signal 30 to the power supply device 23. The self-holding circuit 26 receives an on / off request signal 31 from the outside and outputs an on / off request condition 32 to the remote / local changeover switch 27.

Next, the operation of the power on / off control system of FIG. 7 will be described. The power supply device 23 includes an on / off control circuit 2
An on / off control signal 30 from 5 controls whether output 28 is on or off. The on / off state signal 34 outputs the on / off state of the power supply device 23 to the outside. The self-holding circuit 26 inverts the held on / off request condition 32 from on to off or from off to on each time a pulsed on / off request signal 31 is externally applied. At this time, when the on / off request signal 31 is given as a status signal instead of a pulse signal, it is possible to bypass the self-holding circuit 26 and directly input to the remote / local changeover switch 27.

The remote / local changeover switch 27 is
When set on the remote side, the on / off request condition 33 is input to the on / off control circuit 25, and when set on the local side, the on request and the off request are invalidated regardless of the on / off request condition 33. The on / off control circuit 25
On / off request condition 33 which is the output of the remote / local changeover switch 27 and setting condition 29 of the power switch 24
On / off of the output 28 of the power supply device 23 is determined on the basis of the combination condition of and, and the on / off control signal 30 is output to the power supply device 23.

Further, in the "remote power-on system" of Japanese Patent Application Laid-Open No. 58-116025, the power-on (on) of the terminal device is automatically turned on by a local / remote switch by an automatic power source control device and by an operator. Disclosed is a remote power-on method that enables switching and switching.

[0007]

The first problem of the above-mentioned prior art is that when the remote side is set, the output cannot be turned on only by the power switch, so it is difficult to determine whether or not there is a failure. . The reason is that when the remote side is set, the output is turned on for the first time when both the power switch and the remote on / off request signal are turned on.

The second problem is that the ON / OFF request signal is a pulse signal and if the power switch is turned on at the time of setting to the local side, it cannot be set to the remote side on the way. The reason is that the self-holding circuit outputs the off state, and therefore the output is turned off again depending on the combination condition with the power switch.

It is an object of the present invention to provide power on / off control of an electronic device by connecting the electronic device without a power on / off control circuit.

Another object of the present invention is to provide a power control system by remote operation or switch. Another object is to provide a power control method that improves operability and reliability of power on / off.

[0011]

In order to solve the above-mentioned problems, the power supply control system according to the present invention employs the following characteristic configuration.

(1) The on / off control of the power supply to the load is controlled.
Control signal and remote signal from the local switch
In the power control method performed based, said local Sui
The switch is configured to return to its original state after the switch is operated.
The disconnection control signal disconnects the power supply to the load.
Holds the state of the relay circuit and the disconnection control signal
Based on the control signal input from the local switch.
ON by switching the state of the held disconnection control signal
Switch on / off that outputs control signal or off control signal
Control circuit and remote ON signal or
In response to the ON control signal from the ON / OFF control circuit,
The connection control signal to control the power supply to the relay circuit.
Output to the relay circuit, and also remote off signal
Or off control from the switch on / off control circuit
Controls the power supply to the relay circuit in response to a signal
ON / OFF to output a disconnection control signal to the relay circuit for
An off control circuit, and a power supply control method.

(2) A control switch is provided to the on / off control circuit.
Switch is connected to the remote ON signal or remote
The power supply control method according to (1) above, wherein the off signal is invalidated.

(3) A solid circuit is used as the relay circuit.
(1) or using an auto relay (SSR)
(2) Power supply control method.

(4) The relay is external or internal to the device.
Connected to the load to turn AC commercial power on / off
The power supply control method according to any one of (1) to (3) above.

[0016]

[0017]

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a power supply control system according to the present invention will be described below in detail with reference to the accompanying drawings.

First, FIG. 1 is a block diagram of a first embodiment of a power supply control system according to the present invention. In FIG. 1, the electronic device 1 has a remote control switch 2, an on / off control circuit 3, a switch on / off control circuit 4, a local switch 5 and a solid state relay (hereinafter referred to as SSR) 6. A remote ON signal 8 and a remote OFF signal 9 are input to the ON / OFF control circuit 3 from the outside, and a switch ON signal 10 and a switch OFF signal 11 are received from the switch ON / OFF control circuit 4. Furthermore,
The on / off control circuit 3 outputs the SSR control signal 12 to the switch on / off control circuit 4 and the SSR 6. SS
The external load 7 is connected to R6.

The remote control switch 2 is an SSR according to a remote ON signal 8 and a remote OFF signal 9 from the outside.
6 is a switch for enabling / disabling ON / OFF of 6 and is input to the ON / OFF control circuit 3. Further, the on / off control circuit 3 includes a remote on signal 8, a remote off signal 9,
A switch-on signal 10 and a switch-off signal 11 are received. Each of these signals is a pulse signal. Further, the on / off control circuit 3 has a self-holding circuit. Remote on signal 8, remote off signal 9, switch on signal 1
0 and switch-off signal 11 causes SSR control signal 1
2 is determined.

The switch on / off control circuit 4 is turned on / off.
The SSR control signal 12 which is the output signal of the off control circuit 3 and the output of the local switch 5 are received. When the local switch 5 is pressed, the SSR control signal 12 outputs the switch-on signal 10 or the switch-off signal 11. The switch-on signal 10 and the switch-off signal 11 are input to the on / off control circuit 3. Local switch 5
Is used to turn the SSR 6 on or off and is input to the switch on / off control circuit 4. The SSR 6 is turned on / off by an SSR control signal 12 which is an output signal from the on / off control circuit 3. When turned on, the AC commercial power supply is supplied to the external load 7. Further, at the time of off, the AC commercial power supply supplied to the external load 7 is cut off.

Next, FIG. 2 is a detailed configuration diagram of the switch on / off control circuit 4 in the electronic device 1 which employs the power supply control system of FIG. This switch on / off control circuit 4
Is composed of a self-holding circuit 13 and a selection circuit 14. The self-holding circuit 13 receives the SSR control signal 12 output from the on / off control circuit 3 and the switch pressing signal from the local switch 5, and outputs a self-holding circuit output signal 15 to the selection circuit 14. In addition, the selection circuit 14
The self-holding circuit output signal 15 and the switch pressing signal are input, and the switch-on signal 10 and the switch-off signal 11 are output to the on / off control circuit 3.

Here, the self-holding circuit 13 holds the SSR control signal 12 by the switch pressing signal and outputs the self-holding circuit output signal 15 to the selection circuit 14. Further, the selection circuit 14 outputs the switch-on signal 10 or the switch-off signal 11 to the on / off control circuit 3 by the self-holding circuit output signal 15 while the switch pressing signal is in the on state.

Next, the operation of the power supply control method according to the present invention shown in FIGS. 1 and 2 will be described in detail. First, a case where the local switch 5 controls the on / off of the SSR 6 will be described. When the local switch 5 is pressed while the SSR 6 is off, the switch-on signal 10 is output because the SSR control signal 12 to the switch-on / off control circuit 4 before the local switch 5 is pressed is in the off state. Therefore, the on / off control circuit 3 holds the switch-on signal 10 in the self-holding circuit 13 and turns on the SSR control signal 12. At this time, the SSR control signal 12 is input to the switch on / off control circuit 4, but the switch on signal 10 does not change because the local switch 5 is being pressed.
The SSR 6 is turned on by the SSR control signal 12 so that the AC commercial power source is supplied to the external load 7.

When the local switch 5 is depressed again in this state, the switch on / off control circuit 4 outputs the switch off signal 11 because the state of the SSR control signal 12 before the depression of the local switch 5 is on. . Therefore,
The on / off control circuit 3 holds the switch-off signal 11 in the self-holding circuit and turns off the SSR control signal 12. At this time, the SSR control signal 12 is input to the switch on / off control circuit 4, but the switch off signal 11 does not change because the local switch 5 is being pressed. But SS
R6 is turned off in response to the SSR control signal 12, and shuts off the AC commercial power supply supplied to the external load 7.

Next, the operation when the SSR 6 is turned on / off by a remote signal will be described. When the SSR 6 is off and the remote on signal 8 is input, it turns on / off.
The off control circuit 3 holds the remote on signal 8 in the self holding circuit and turns on the SSR control signal 12. At this time,
The SSR control signal 12 is input to the switch on / off control circuit 4, but the switch signal does not change because the local switch 5 is not operating. The SSR 6 is turned on in response to the SSR control signal 12, and AC commercial power is supplied to the external load 7.

When the remote-off signal 9 is input from the outside in this state, the on / off control circuit 3 holds the remote-off signal 9 in the self-holding circuit and turns off the SSR control signal 12. At this time, the SSR control signal 12 is input to the switch on / off control circuit 4, but the switch signal does not change because the local switch 5 is not operating. The SSR 6 is turned off by the SSR control signal 12, and cuts off the AC commercial power supply supplied to the external load 7.

As can be understood from the above operation, according to the power supply control method of the present invention, even if the SSR 6 is turned on by the remote signal 8, it can be turned off by the local switch 5. Further, even if the local switch 5 turns it on, it can be turned off by the remote signal 9.

When the remote control switch 2 is turned off, the SSR 6 cannot be controlled even if the remote on signal 8 or the remote off signal 9 is input to the on / off control circuit 3. That is, the remote operation (control) is invalidated, and the power supply or the SSR 6 can be controlled only by the pressing operation of the local switch 5.

FIG. 3 is a timing chart for explaining the operation of the power supply control method shown in FIGS. FIG. 3 (a),
(B) is a remote on signal 8 and a remote off signal 9, respectively. FIG. 3C shows the remote control switch 2
Indicates the state of. FIG. 3D shows the pressing operation of the local switch 5. FIG. 3E shows the self-holding circuit output signal 1
5 is shown. 3F and 3G show a switch-on signal 10 and a switch-off signal 11 from the switch-on / off control circuit 4, respectively. In addition, FIG.
The control signal 12 is shown.

When the remote control switch 2 of FIG. 3C is on, both remote control and local control by the local switch 5 are possible. First, when the SSR control signal 12 (see FIG. 3 (h)) is off, pressing the local switch 5 causes the self-holding circuit output signal 15 (see FIG. 3).
The off state of the SSR control signal 12 is held in (e). When the switch-on signal 10 (see FIG. 3 (f)) is turned on, the SSR control signal 12 is turned on. When the local switch 5 is pressed again (see FIG. 3 (d)),
The self-holding circuit output signal 15 holds the on state of the SSR control signal 12, and the switch off signal 11 is output.
The SR control signal 12 is turned off.

When the remote control switch 2 is turned off (right end in FIG. 3), even if the remote on signal 8 (see FIG. 3 (a)) and the remote off signal 9 (see FIG. 3 (b)) are input, they are ignored. It It responds only to the pressing operation of the local switch 5.

Next, another embodiment of the power supply control method according to the present invention will be described with reference to FIGS.
Incidentally, these electronic devices 1a, 1b, 1c shown in FIGS.
Since many components are the same as those of the electronic device 1 of FIG. 1, the same reference numerals are used for convenience.

In the power control system of FIG. 4, the SSR6
The load controlled by the electronic device 1 is not the external load 7.
1 is different from the power supply control system of FIG. 1 in that the device power supply 16 is inside.

In the power supply control system of FIG. 5, a relay 17 is used in place of the SSR 6 of FIGS. 1 and 4, and the relay 17 turns on / off the AC commercial power supply to the external load 7. Control.

Further, in the power supply control system of FIG. 6, the electronic device 1c has substantially the same configuration as the electronic device 1 of FIG.
The SSR control signal 12 from the on / off control circuit 3 is taken out to allow the remote side to grasp the on / off state of the power supply.

Above, several embodiments of the power supply control system according to the present invention have been illustrated, and their configurations and operations have been described in detail. However, it should be easily understood by those skilled in the art that the present invention should not be limited only to such specific embodiment examples, and various modifications and changes can be made as necessary or according to specific applications.

[0038]

As will be understood from the above description, according to the power supply control system of the present invention, various remarkable effects as described below can be obtained.

First, the power supply to the load can be controlled by pressing the local switch even in the remote control enabled state. The reason is that the power supply is controlled by the logical sum of the remote-on signal and the switch-on signal generated by pressing the local switch.

Second, the maintainability is excellent. The reason is that by providing a remote control switch and turning it off, the control by the remote signal is invalidated and only the on / off control by the local switch is validated.

Thirdly, since no special hardware is required, it can be incorporated into various electronic devices. The reason is that it can be configured without using an IC such as a CPU (central processing unit).

Fourth, the operability is excellent. The reason is that, as the local switch, a momentary switch that restores the state after the switch operation is used instead of a toggle switch or the like that retains the state after the switch operation.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electronic device adopting a power supply control method according to the present invention.

FIG. 2 is a detailed block diagram of a portion of FIG.

FIG. 3 is a timing chart for explaining the operation of the power supply control method of FIG.

FIG. 4 is a configuration diagram of a second embodiment of the power supply control system according to the present invention.

FIG. 5 is a configuration diagram of a third embodiment of the power supply control system according to the present invention.

FIG. 6 is a configuration diagram of a fourth embodiment of the power supply control system according to the present invention.

FIG. 7 is a block diagram of a conventional power supply control method.

[Explanation of symbols]

1, 1a-1c Electronic device 2 Remote control switch 3 ON / OFF control circuit 4 switch on / off control circuit 5 Local switch 6, 17 relay 7, 16 load 8, 9 Remote ON / OFF signal 10, 11 Switch on / off signal 12 Relay control signal 13 Self-holding circuit 14 Selection circuit

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-261858 (JP, A) JP-A-5-35373 (JP, A) JP-A-7-306735 (JP, A) JP-A-6- 180621 (JP, A) JP-A-6-59783 (JP, A) JP-A-60-8913 (JP, A) JP-A-59-144325 (JP, A) JP-A-62-26521 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02J 1/00 G06F 1/26-1/30

Claims (4)

(57) [Claims] 1.Local connection / disconnection control of power supply to load
Based on control signal and remote signal from switch
Power control method The local switch returns to its original state after the switch is operated.
Is configured to Disconnection control of power supply to the load by disconnection control signal
Relay circuit, Hold the state of the disconnection control signal, of the disconnection control signal
ON control of the control signal of the local switch depending on the state
Signal or off control signal
ON / OFF control circuit, Remote ON signal or switch ON / OFF control times
Power to the relay circuit in response to an ON control signal from the circuit.
The relay circuit is provided with a contact control signal for contact control of the power supply.
Output to the remote off signal or the switch
In response to the off control signal from the on / off control circuit
Cutoff control for cutoff control of power supply to the relay circuit
ON / OFF control circuit for outputting a signal to the relay circuit
When, A power supply control method comprising: 2. A control switch is provided in the on / off control circuit.
Connected to the remote on signal or remote off signal.
The power supply according to claim 1, wherein the signal is invalidated.
control method. 3. A solid state relay as the relay circuit.
Ray (SSR) is used.
Or the power control method described in 2. 4. The relay is applied to an external or internal load.
Be connected to turn on / off the AC commercial power supply
The power supply system according to any one of claims 1 to 3, characterized in that
Method.