KR20020040244A - The controlling apparatus of the power source - Google Patents

Abstract

PURPOSE: A power controlling apparatus is provided to simply configure a magnetic sustaining part and improve reliability of on/off power operation. CONSTITUTION: A power controlling apparatus comprises a relay(10), a DC power supply(11), a rectifier(12), a smoother(13), a magnetic sustaining part(14), a power switch(15) and a processor(16). The relay(10) is turned on/off to supply an AC power. The DC power supply(11) converts the AC power to a DC power. The rectifier(12) rectifies the AC power. The smoother(13) smoothes the rectified voltage. The magnetic sustaining part(14) turns on/off the relay(10). The power switch(15) outputs a power on/off signal to the magnetic sustaining part(14) based on user's operation. The processor(16) monitors state of the power switch(15), stores backup data from a RAM to an auxiliary recording medium, and outputs the power off signal of a magnetic sustaining part(14).

Description

Power controlling device {The controlling apparatus of the power source}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control apparatus, and in particular, comprising two NAND gates that form a closed loop with each other, and two momentary switches that trigger the NAND gate, and having a self-holding unit for controlling the relay on and off. When the switch is turned off, the backup data stored in the RAM is stored in the auxiliary recording medium, and the processor is configured to turn off the main power by controlling the self-maintenance unit. Thus, the self-maintenance unit can be configured very simply. The present invention relates to a power supply control device which further improves reliability.

1 shows a conventional power control device,

The power supply switch 1 for cutting off or supplying the input AC power and the commercial AC power input when the power is turned on are supplied to the processor 4, and when the power is turned off, the magnetic holding is turned off by the control signal of the processor 4. The unit 2, a DC power supply unit 3 for converting the AC power supplied from the magnetic holding unit 2 into a DC voltage and supplying it to the processor 4, and a DC voltage supplied from the DC power supply unit 3; And the processor 4 which monitors the state of the power switch 1 to detect the power-off state, and immediately turns off the self-holding unit 2 to turn off the power.

In the conventional power control device configured as described above, when the user presses the power switch 1, the self-holding unit 2 is turned on, and the commercial AC power is supplied to the DC power unit 3, and the rectification of the DC power unit 3 is performed. The DC power is supplied to the processor 4 by the operation to operate the processor 4.

When the power is off, as the user presses the power switch 1 to switch to the off state, the processor 4 detects this and turns off the self-holding unit 2 to turn off the main power.

Such power control devices are mainly used in places such as computers.

The self-holding unit 2 is configured by using a relay, and a momentary switch is attached to supply a trigger signal of the relay, and a closed loop is formed while the user presses the momentary switch, so that the power switch 1 is turned off. After that, the power is continuously supplied to the DC power supply unit 3. During this time, the processor can store the backup data stored in the RAM in the auxiliary recording medium.

However, when the power switch is pressed by a user's mistake, the conventional power controller has a problem in that the system is turned off at that moment and the data stored in the RAM cannot be backed up in advance. When the holding unit is configured, there is a big disadvantage in that the volume of the entire magnetic holding unit is large, and there is a problem in that a very precise expensive relay must be used.

Accordingly, the present invention for solving the above problems is composed of two NAND gates forming a closed loop with each other, and two momentary switches for triggering the NAND gate is provided with a self-holding unit for controlling the relay on / off, When the switch is turned off, the backup data stored in the RAM is stored in the auxiliary recording medium, and the processor is configured to turn off the main power by controlling the self-maintenance unit. Thus, the self-maintenance unit can be configured very simply. It is an object of the present invention to provide a power supply control device in which the reliability thereof is further improved.

1 is a view showing a conventional power control device.

Figure 2 is a block diagram showing a power supply control apparatus of the present invention.

Figure 3 is a circuit diagram showing in detail the self-maintenance unit applied to the present invention.

Explanation of symbols for main parts of the drawings

10: relay, 11: DC power supply,

12: rectifying part, 13: smoothing part,

14: magnetic holding part, 15: power switch,

16: processor, 21, 22: NANDGATE,

23,24: momentary switch, Q1: transistor,

2 and 3 show the power supply control apparatus of the present invention for achieving the above object,

A relay 10 for supplying AC power supplied to the DC power supply unit 11 by an on / off operation by an external control signal;

A DC power supply unit 11 for directing the AC power supplied from the relay 10 to supply the driving power of the processor;

A rectifier 12 for rectifying the input AC power;

A smoothing part 13 for smoothing and directing the voltage rectified by the rectifying part 12 to the driving power of the self-holding part 14;

A self-maintaining unit (14) which is turned on by a power-on signal to switch the relay to an on state, and then turns off the relay by a power-off signal input from a processor when the power is turned off;

A power switch 15 for driving on / off by a user's operation and outputting a power-on signal to the magnetic holding unit 14 during the on-operation;

The processor monitors the state of the power switch 15, and when the power switch 15 is turned off, the processor stores the backup data stored in the RAM on the auxiliary recording medium and outputs a power off signal to the magnetic holding unit 14. (16); It consists of.

And, the self-holding portion 14,

The first and second NAND gates 21 and 22 form a closed loop, and are turned off when a power off signal is input, so that the first momentary switch switches the input 1 of the first NAND gate 21 to a low state. And a second momentary switch 24 for switching the input 3 of the second NAND gate 22 to a low state during a power-on operation.

A transistor Q1 for turning on / off the relay 10 of the second NAND gate 22 is connected.

Referring to the operation of the present invention configured as described above is as follows.

In the initial state, the relay 10 is in an off state, and the rectifying unit 12 rectifies and supplies the commercial AC power input to the smoothing unit 13, and the smoothing unit 13 smoothes the rectified voltage and directs the DC. To the drive voltage of the self-holding portion 14.

In this state, when the user presses the power switch 15 to switch to the on state, the power switch 15 outputs a power-on signal to the magnetic holding unit 14, and the magnetic holding unit 14 switches the power switch 15. The power is turned on by the power-on signal input from the on state, and the relay 10 is turned on, and the relay 10 is turned on to supply the input alternating voltage to the DC power supply 11.

The DC power supply unit 11 converts the input AC voltage into DC to supply it to the processor 16, so that the processor 16 does not operate.

Thereafter, when the user turns off the power switch 15, the processor 16 monitors the state of the power switch 15, checks that the power switch 15 is turned off, and then stores backup data stored in the RAM on the auxiliary recording medium. After storing, the power-off signal is output to the magnetic retaining unit 14.

Even when the power switch 15 is turned off, the self-holding portion 14 does not turn to the off state but waits for a power-off signal to be input from the processor 16.

Accordingly, the self-holding unit 14 operates by the power-off signal input as the power-off signal from the processor 16 to turn off the relay 10, thereby supplying power to the processor 16. This is completely blocked.

3 shows in detail the magnetic retaining portion 14 applied to the present invention.

The commercial AC power input is half-wave rectified through the diode D1, smoothed by a smoothing circuit composed of a zener diode D2, a capacitor C1, and a resistor R4, and converted into a DC voltage to convert the first and second NAND. The gates 21 and 22 are supplied with driving voltages of the first and second momentary switches 23 and 24.

In the initial state, the input 1 of the first NAND gate 21 is high and the input 2 is low. Since the input 3 of the second NAND gate 22 is high and the input 4 is high, the output of the second NAND gate 22 is high. This goes low and transistor Q1 is present in the off state.

When the transistor Q1 is in the off state, the output of the relay 10 does not exist, so the relay 10 is in the off state.

At this time, when the user presses the power switch 15 to turn it on, the second momentary switch 24 is turned on by the power-on signal output from the power switch 15, and the second NAND gate 22 is turned on. The input 3 is switched to the low state, whereby the output value of the second NAND gate 22 is switched to the high state so that the transistor Q1 is turned on to operate the relay 10.

AC power is supplied to the DC power supply unit 11 by the operation of the relay 10, and driving power is supplied to the processor 16.

As described above, the high signal output from the second NAND gate 22 is supplied to the input 2 of the first NAND gate 21 forming a closed loop, so that the input 1 of the first NAND gate 21 is low. Until switching, the output of the second NAND gate 22 remains high.

On the other hand, when the user turns off the power switch 15, the processor 16 stores all backup data stored in the RAM to the auxiliary recording medium and outputs a power off signal to the first momentary switch 23, As the first momentary switch 23 is turned off by this power-off signal, the input 1 of the first NAND gate 21 is turned low, whereby the output of the first NAND gate 21 is turned high. The output of the second NAND gate 22 is switched to the low state so that the transistor Q1 is turned off and the relay 10 is also turned off.

Reference numerals R1 to R12 described above are resistors, C1 to C6 are capacitors, and D3 and D4 are diodes.

As described above, the present invention comprises two NAND gates that form a closed loop with each other, and two momentary switches that trigger the NAND gate, and include a self-holding unit to control the relay on and off, and to turn off the power switch. By storing the backup data stored in the RAM on the auxiliary recording medium and configuring the processor to turn off the main power by controlling the self-maintaining unit, the self-maintaining unit can be configured very simply and the reliability of the power on / off operation is high. The effect of providing a power supply control device for further improvement can be expected.

Claims (2)

A relay 10 for supplying AC power supplied to the DC power supply unit 11 by an on / off operation by an external control signal; A DC power supply unit 11 for directing the AC power supplied from the relay 10 to supply the driving power of the processor; A rectifier 12 for rectifying the input AC power; A smoothing part 13 for smoothing and directing the voltage rectified by the rectifying part 12 to the driving power of the self-holding part 14; A self-maintaining unit (14) which is turned on by a power-on signal to switch the relay to an on state, and then turns off the relay by a power-off signal input from a processor when the power is turned off; A power switch 15 for driving on / off by a user's operation and outputting a power-on signal to the magnetic holding unit 14 during the on-operation; The processor monitors the state of the power switch 15, and when the power switch 15 is turned off, the processor stores the backup data stored in the RAM on the auxiliary recording medium and outputs a power off signal to the magnetic holding unit 14. Power control device, characterized in that consisting of (16). The method of claim 1, wherein the self-maintenance unit 14, The first and second NAND gates 21 and 22 form a closed loop, and are turned off when a power off signal is input, so that the first momentary switch switches the input 1 of the first NAND gate 21 to a low state. And a second momentary switch 24 for switching the input 3 of the second NAND gate 22 to a low state during a power-on operation. And a transistor (Q1) for turning on / off the relay (10) at the output terminal of the second NAND gate (22).