KR20040096405A - power supplier with cut-off circuit for abnormal state including standing mode - Google Patents

Abstract

The present invention provides a power supply apparatus having a power cut-off circuit that detects power supplied from an electric and electronic device and cuts off power supply when an abnormal voltage including a standby mode voltage is applied for a predetermined time.

To this end, the present invention includes an electrical connection that can connect at least one or more electrical loads to the electricity supply line for supplying alternating current; A cutoff switch for turning on / off the electricity supply to the electricity supply line; A switch driver for driving the cutoff switch; An instrument transformer for detecting electricity consumed by the electric device; A standby mode determination unit for determining that the output voltage of the instrument transformer is in standby mode; A time setting unit for driving the switch driving unit when a standby mode is determined from the standby mode detecting unit and a predetermined time elapses; And a DC power supply unit for converting an AC voltage from the electric power lines into a DC voltage and supplying DC power to the switch driver, the standby mode determiner, and the time setting unit. A power supply having a power interruption circuit is disclosed.

Description

Power supply with abnormal power supply circuit including standby mode {power supplier with cut-off circuit for abnormal state including standing mode}

The present invention relates to a power supply having an abnormal power supply power cut-off circuit including a standby mode for shutting off standby power in a standby mode of an electric and electronic device, and more particularly, to detect a power supplied from an electric and electronic device. The present invention relates to a power supply having an abnormal power supply cut-off circuit including a standby mode that cuts off power supply when an undervoltage including an idle mode voltage and an overvoltage abnormal voltage are applied for a predetermined time.

When the power supply is classified into normal electric and electronic devices such as TVs and air conditioners, power is cut off when no power is supplied to the device, and driving power is supplied to the device to ensure normal operation and normal operation of the device. Although the power for the operation is not applied, the control unit and the remote control receiver are operated, and thus can be classified into a standby mode state in which standby power for operating the device is supplied by a received signal received from the remote control. Standby mode is a state for receiving the self-check or transmission signal of the remote controller when the main function is stopped. Even if the power consumption is shorter than the power consumption for the main function, the power consumption may increase. Considering the situation where only a lot of electricity and electronics are used and used in a home, a lot of energy is wasted unnecessarily in the country.

Accordingly, an object of the present invention is to provide a device that detects a standby mode of a connected device and cuts off the power supplied to the device when the standby mode exceeds a preset time. It is for.

Another object of the present invention is to detect the undervoltage including the standby mode supplied to the device to cut off the power of the connected device.

Still another object of the present invention is to detect an overvoltage condition in which power supplied to a device prevents damage to the device by immediately shutting off the power to a connected device.

Still another object of the present invention is to provide a power supply device having an abnormal power supply power cut-off circuit including a standby mode, but to simplify the circuit and eliminate the failure factor, thereby making it convenient and inexpensive to use.

Still another object of the present invention is to draw a remote switch for operating the device to the outside and to place the remote switch in a location convenient for the user to operate the device on and off and to operate the power cutoff circuit. It is to.

1 is a block diagram illustrating an embodiment of the present invention.

FIG. 2 is a detailed circuit diagram of one embodiment shown in FIG. 1 of the present invention.

A feature of the present invention for achieving the above object is an electrical connection that can connect at least one or more electrical loads to the electrical supply line for supplying alternating current; A cutoff switch for turning on / off the electricity supply to the electricity supply line; A switch driver for driving the cutoff switch; An instrument transformer for detecting electricity consumed by the electric device; A standby mode determination unit for determining that the output voltage of the instrument transformer is in standby mode; A time setting unit for driving the switch driving unit when a standby mode is determined from the standby mode detecting unit and a predetermined time elapses; And a direct current power supply unit converting an alternating current voltage into direct current voltages from the electric power lines to supply direct current power to the switch driver, the standby mode determiner, and the time setting unit.

The apparatus may further include an overvoltage judging unit configured to detect an overvoltage by comparing a voltage output from the instrument transformer with a predetermined reference voltage, and the switch driver may turn off the switch by an overvoltage signal from the overvoltage judging unit. It is desirable to make it.

In addition, in the present invention, the output power of the DC power supply unit further includes a remote switch drawn from a power supply having an abnormal power supply power cut-off circuit including the standby mode, the standby mode plate when the remote switch is on Preferably, a DC power is supplied to the government and the time setting unit.

Further, in the present invention, the output voltage from the instrument transformer is input to the base through a variable term resistance and a capacitor for setting a reference voltage, and the collector is in a steady state (H) and a standby mode according to the voltage input to the base. And a display circuit for displaying the state L, wherein the time setting unit receives the normal state signal and the standby mode state signal from the display circuit, and inputs the normal state signal. The standby mode is started and the drive signal is supplied to the switch driving circuit until the predetermined time, and the cutoff switch is kept on. When the standby mode state is elapsed, the switch driving circuit is inoperative. Preferably, the cutoff switch is turned off by supplying a signal.

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

1 is a block diagram illustrating an embodiment of the present invention.

At the ends of the AC power supply lines 100 and 200, an electrical connection portion 2 is formed to insert power plugs of ordinary electric devices to receive power, and among the AC power supply lines 100 and 200, The cutoff switch 3 is installed in either line. The disconnect switch 3 may be an electronic contactless switch such as a silist or a contact switch driven by a relay. Instrument transformer 4 for detecting power consumption or flowing current amount of loads connected to the electrical connection portion 2 between the power cutoff switch 3 and the electrical connection portion 2 of the AC power supply line, and generating a voltage corresponding thereto. Is provided, and the output from the instrument transformer 4 is input to the standby mode judging section 7 and the overvoltage judging section 8. The standby mode determination unit 7 outputs the normal signal to the time setting unit 6 in the case of the steady state voltage, and determines the standby mode when the output voltage decreases from the instrument transformer 4 by more than a predetermined value. The standby mode signal is output to the time setting section 6. The time setting unit 6 outputs a drive signal to the switch driver 5 when the standby mode signal continues for a predetermined time, and switches off the shutoff switch 3 when the drive signal is input in the switch driver 5. do. Further, in the overvoltage judging section 8, if the voltage output from the instrument transformer 4 is equal to or higher than a predetermined voltage, the overvoltage signal is output to the switch driver 5 to the switch driver 5 so that the switch driver 5 causes the disconnect switch. (3) shall be blocked. In addition, a DC power supply unit 1 for drawing out a DC control power is provided between the power supply lines 100 and 200, and from the DC power supply unit 1, the switch driving unit 5, the time setting unit 6, The driving power supply of the standby mode determination unit 7 and the overvoltage determination unit 8 is supplied.

FIG. 2 is a detailed circuit diagram of one embodiment shown in FIG. 1 of the present invention.

The detailed circuit diagram shown in FIG. 2 may be variously modified as an example of the detailed circuit implemented by adding the remote switch 10 and the remote switch insertion port 9 to the block diagram of FIG. 1.

The DC power supply 1 is composed of a transformer T1 and a bridge BD for converting the supply voltage between the power supply lines 100 and 200 to low voltage, and the DC power output from the bridge BD is a remote switch. The power supplied to the switch driver 5 and the voltage regulator RG through the insertion port 9 of (10) and regulated by the voltage regulator RG is the time setting section 6, the standby mode determining unit 7 ) Is supplied to the driving power of the overvoltage judging unit 8.

The standby mode determination unit 6 is biased by R1 and R2 by the power supplied from the DC power supply unit 1, and the output of the instrument transformer 4 is input to the base through the variable resistor Vr1 and the capacitor C2. The transistor comprises a capacitor C1, a diode D1, a ground capacitor C4, and a ground resistor R4 connected to the connection point of the capacitors C1 and D1. When the normal voltage is input to the instrument transformer 4, Vr1 is set to operate the transistor Q1, and in this state, the connection point ① of D1 and C4 is at high potential, that is, maintained at high (hereinafter referred to as H). However, when the low voltage in the standby mode is applied to the instrument transformer 4, the transistor Q1 is no longer operated, and eventually the transistor Q1 is in an inoperative state, and the potential at the connection point ① is low due to the discharge of the capacitor C4. The potential is switched to the low state (hereinafter referred to as L). By setting Vr1, not only the power supply detection in the standby mode but also the undervoltage falling below a certain value above the normal voltage can be switched from the H state to the L state, which is a circuit design problem.

The time setting section 6 is configured by the timer IC IC1 of the 555. The power output from the voltage regulator RG is input to the power supply terminal VCC and the reset terminal RST of the IC1, and the discharge terminal DSC and the threshold terminal THS are connected to each other at the connection point ②. Is sequentially connected to the voltage regulator RG through the resistor R7 and the variable resistor Vr2, and the connection point ② is grounded through the capacitor C5. In addition, the variable resistor Vr2 is grounded by the resistors R5 and R6. In addition, a capacitor C6 is connected to the control terminal CNV and grounded. The output terminal OUT is connected to the switch driving circuit 6 through the resistor R8, and the trigger terminal TRG is connected to the collector of the transistor Q2 having a base connected to the connection point ① of the standby mode determining section 7, and the transistor Q2. The emitter of is grounded. In addition, the collector of the transistor is connected to the voltage regulator RG through the resistor R9.

In the normal operation state in which the connection point ① of the standby mode judgment 7 becomes H, the transistor Q2 of the time setting section 6 is brought into a conducting state to maintain the potential of the trigger terminal TRG in the L state, In the standby mode where the potential is L, the transistor Q2 is in an inoperative state to convert the potential of the trigger terminal TRG to the H state. When the trigger terminal TRG is converted to the H state, the capacitor C5 is discharged by the time constant determined by the variable resistor Vr2 and the capacitor C5. When the discharge is completed, the output terminal maintains the H state until the steady state and before discharge ends. (OUT) is converted to L state.

The switch driver 5 includes a thyrth TH in which the output of the output terminal OUT is connected to the connection point ③ of the transistor Q3 and the resistor R8 and the diode D2 inputted to the base through the resistor R8 and the diode D2. The relay Ry is connected to the collector of the transistor Q3, and the cutoff switch SW is operated by the relay Rydp. Since the output of the output terminal OUT is in the H state in the normal state and until the discharge of the capacitor C5 is completed, the transistor Q3 maintains the conduction state so that the relay maintains the cutoff switch SW in the ON state. Power is normally supplied to the connected load. However, when the standby mode is started and the discharge of the capacitor C5 is terminated by a predetermined time, that is, the time constant determined by the variable resistors Vr2 and C5, the output terminal of the time setting section 6 is switched to the L state and the transistor Q3. Turns off the breaker switch SW from ON to OFF because power is not supplied to the relay Ry. Therefore, after the standby mode is started and the time set by the time constant has elapsed, the power supply to the load connected to the electrical connection unit 2 is no longer supplied.

The overvoltage judging unit 8 flashes the LEDs and the LEDs operated by the multi-arlington circuit when the output is in the H state and the multi-arlington circuit by Q4 and Q5 which amplifies the output of the operational amplifier (OP-AMP) and the operational amplifier. An oscillation circuit 81 and a resistor R12 for inputting the output of the operational amplifier OP-AMP to the gate terminal of the sith TH. The inverting terminal (-) of the operational amplifier OP-AMP is connected to the DC power supply through the resistor R11, and grounded through the resistor R10 and the variable resistor Vr3 to set a voltage value determined as an overvoltage. When the voltage of the connection point ① is inputted through the resistor R13 to the non-inverting terminal (+) and compared with the setting voltage, and the voltage of the non-inverting terminal (+) is higher than the reference setting voltage, an output signal of the H state is generated. The output signal of the H state of the operational amplifier OP-AMP is input to the gate of the silist TH to conduct the cilist TH, and when the cilist TH becomes conductive, the transistor Q3 is in an inoperative state. Since the relay Ry makes the cutoff switch SW to be in an OFF state, the cutoff switch is turned OFF in an overvoltage state so that power is no longer supplied to the load connected to the electrical connection unit 2.

In addition, the remote switch insertion port 9 may be installed to be drawn away from the electrical connection (2). Since the electrical connection part is usually placed under the desk or near the wall, and it is difficult for the user to access it conveniently, the remote switch insertion port 9 can be spaced apart from the electrical connection part 2 so as to be placed at a convenient location for the user. . The remote switch 10 inserted into the remote switch insertion port 9 is connected to the insertion port 9, and a switch for connecting a port terminal and a switch for turning on or off the power supplied from the DC power supply 1 inside the connection jack. And the LED is emitted in the ON state is provided.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

The present invention having the above object and configuration can save unnecessary energy wasted by completely shutting off the power to the load connected to the electrical connection in the standby mode, and can protect the device from undervoltage and overvoltage, By simplifying the circuit configuration, the manufacturing process and the defect rate can be reduced.

Claims (4)

An electrical connection portion capable of connecting at least one or more electrical loads to an electrical supply line for supplying alternating current; A cutoff switch for turning on / off the electricity supply to the electricity supply line; A switch driver for driving the cutoff switch; An instrument transformer for detecting electricity consumed by the electric device; A standby mode determination unit for determining that the output voltage of the instrument transformer is in standby mode; A time setting unit for driving the switch driving unit when a standby mode is determined from the standby mode detecting unit and a predetermined time elapses; And An abnormal power supply including a standby mode, characterized in that it comprises a DC power supply for supplying a DC power to the switch driver, the standby mode determination, the time setting unit by converting an AC voltage from the electric power lines to a DC voltage Power supply with cutoff circuit. The switch driver of claim 1, further comprising an overvoltage judging unit configured to detect an overvoltage by comparing a voltage output from the instrument transformer with a predetermined reference voltage, wherein the switch driver turns off the switch by an overvoltage signal from the overvoltage judging unit. A power supply having an abnormal power supply cut-off circuit including a standby mode characterized in that the state. The power supply of claim 1, wherein the output power of the DC power supply unit further comprises a remote switch drawn from a power supply device having an abnormal power supply power cut-off circuit including the standby mode, and wherein the standby mode is turned on when the remote switch is turned on. And a DC power supply to the determination unit and the time setting unit. The power supply device having an abnormal power supply power cut-off circuit including a standby mode. 4. The collector according to any one of claims 1 to 3, wherein the output voltage from the instrument transformer is input to the base through a variable term resistor and a capacitor for setting a reference voltage, and the collector according to the voltage input to the base. A display circuit for displaying a steady state (H) and a standby mode state (L), the time setting unit being configured to receive the steady state signal and the standby mode signal from the display circuit; When the steady state signal is input and the standby mode state is started and a predetermined time is supplied, a drive signal is supplied to the switch driving circuit to keep the cutoff switch on, and the preset time period of the standby mode state has elapsed. The standby mode, characterized in that for supplying a non-operation signal to the switch driving circuit to turn off the cutoff switch A power supply with an abnormal power supply cut-off circuit including a card.