KR200356541Y1 - Electronic switch - Google Patents

Abstract

The present invention implements an electronic switch using only two lines of the first line and the second line, thereby solving the disadvantages of the conventional three-wire electronic switch, and at the same time, the disadvantage of power consumption and power stability of the conventional two-wire electronic switch. An electronic switch having a structure to solve the problem, wherein a diode connected between the first line and the second line and a lamp are turned off so that when the first line and the second line are cut off, power is separately supplied from the first line. A power supply unit 100 including a rectifying second rectifying unit; A voltage stabilizer (200) including a zener diode to block an abnormal rise of the output voltage of the power supply unit (100); It is composed of a relay control unit 300 including a self-maintaining relay operated by the DC voltage generated by the power supply unit 100.

Description

Electronic switch for power stabilization and low power consumption

The present invention relates to an electronic switch. When turning on or off lighting or electric equipment, switch is used. Recently, for convenience and stabilization of living environment, it is necessary to turn on and off with a remote control using infrared rays. To do this, many electronic switches with additional electronic circuits are used. The present invention is a circuit designed to effectively obtain the power consumed by the electronic circuit used in the switch, and to minimize the power consumed by the circuit.

Configuration of the conventional 3-wire switch

A normal light switch has two terminals and turns on when the terminals are connected and turns off when disconnected. Electronic switches use relays (RY1) for point and light out or SCR and triacs to configure the circuit. This circuit is shown in Fig. 1A. The controller 10 is required to drive and control the relay RY1, which is configured to receive a signal from the remote controller or to turn on the morning wake-up time by a built-in clock, and to turn off the lights according to the bedtime reservation time. can do. In order to obtain the power required for the operation of the control unit, a power supply unit 12 is required, and the circuit constructed by a method of receiving an additional 220V as a power source is the circuit of FIG. 1A. In this circuit, three input / output terminals L1, L2, and L3 are required, so it is referred to as a 3-wire electronic switch.

Such a switch system may supply power required for the control unit 10 from the power supply unit 12, but may stably supply power even when the load capacity is changed, and stably supply power even when the power consumed by the control unit 10 is large. It is generally used, but it is inconvenient because it can not be used in the place where the general switch is removed and replaced because there are three input / output terminals.

Configuration of the conventional 2-wire switch

A two-wire type electronic switch has been developed to remove and replace a general switch, which is shown in FIG. 1B. In the two-wire configuration, when the relay RY2 is turned on, a current flows through the resistor R1 to obtain a power supply necessary for the controller.

However, in such a switching system, when the relay RY2 is turned off, since no current flows through the resistor, power cannot be obtained, so a separate circuit needs to be configured. To this end, in the OFF state, a circuit is configured such that a current flowing through the C2 passes through the power supply unit 12 and then flows to the lamp L. FIG. As a result, the circuit is limited to supply sufficient power to the control unit 10. Also, due to the voltage drop occurring at the resistor R1, a large amount of heat is generated or a low current drop is caused by the change in the lamp capacity. Due to the lack of power, it is impossible to obtain a stable power source, and there are many restrictions on use.

Therefore, the present inventors solve the disadvantages of the installation of the conventional three-wire electronic switch by implementing the electronic switch using only two lines as an input, and at the same time solve the disadvantages of power consumption and power stability of the conventional two-wire electronic switch. An electronic switch having a structure of

1A and 1B are circuit diagrams of a conventional electronic switch.

2 is an overall circuit diagram of an electronic switch according to the present invention.

3 is a circuit diagram of a power supply unit.

4 is a circuit diagram of a second rectifier and a voltage stabilizer.

5 is a circuit diagram of a relay controller.

The entire circuit of the electronic switch according to the present invention is shown in FIG. As shown in FIG. 2, the electronic switch is implemented using only two lines of L1 and L3, thereby solving the disadvantages of the conventional three-wire electronic switch and at the same time, the disadvantages of power consumption and power stability of the conventional two-wire electronic switch. It has a structure to solve.

Fig. 2 shows only the configuration of the electronic switch as divided by the dotted lines in Figs. 1A and 1B, so that the connection method with the external power line and the lamp are the same as those in Figs. 1A and 1B. I never do that.

With reference to Figure 2 looks at the configuration of the present invention. The present invention is an electronic switch connected to both ends of the lamp and connected to the first wire and the second wire which flows a current to the lamp to electronically control the lamp, and includes the following elements.

A pair of diodes connected in series between the first line and the second line, each of which is connected in parallel with opposite polarity, a transformer for boosting a voltage generated across the diode, and an AC boosted in the transformer to rectify with DC. A power supply unit 100 including a first rectifying unit and a second rectifying unit which receives power separately from the first line when the lamp is turned off to cut off the first line and the second line,

Voltage stabilization unit 200 including a zener diode to block the abnormal rise of the output voltage of the power supply unit 100,

It includes a relay operated by the DC voltage generated by the power supply unit 100, the relay is operated once once the current flows in the coil after the state is maintained in the self-maintained state even if the power is turned off after changing to the ON state or OFF state Relay control unit 300 that is a relay.

Hereinafter, each component will be described in more detail.

Power supply unit 100

When a resistor is used as a method of obtaining power at lighting, as shown in FIG. 1B, an unstable power is inevitably obtained according to the change in the capacity of a load lamp. However, when diodes D1 and D2 are used instead of resistors as shown in FIG. Without this, the voltage drop of diodes D1 and D2 is always constant at about 0.6V, so that a relatively stable voltage can be obtained. When the voltage V1 generated across the diodes D1 and D2 is boosted by the transformer and rectified by the rectifier circuit, a high-quality DC voltage VCC necessary for the relay controller 300 can be obtained.

On the other hand, when the lamp is extinguished (when the lamp is OFF), the power supply passes through the bridge diode BD2, which is the second rectifying part, through L1 to C3, and forms a route for the current to flow through the lamp through the line L3. Power on. Since alternating current is used, the above flow chart is reversed.

Voltage stabilization unit 200

In the present invention, the voltage stabilizer 200 is added separately. This constitutes a zener diode circuit as shown in the right side of FIG. 4, thereby preventing abnormal rise in voltage from the zener diode ZD1, thereby stably supplying power.

Relay control unit 300

When the power supply voltage is obtained by the method of the present invention, it is possible to stably obtain a power supply that does not interfere with operation. However, when the load is very small (for example, a fluorescent lamp of about 20 W), a current enough to drive the relay cannot be obtained. have. In order to solve this problem, in order to solve this problem, the current flows only when the relay is in operation and the latch is applied when the power is turned off after the relay is turned ON or OFF. I tried to reduce it as much as possible.

In the circuit of Fig. 5, to turn on the relay RY3, Tr2 is turned on by applying Low (0V) to the B2 terminal, and Tr3 is turned on by applying High (5V) to the B1 terminal. The current then flows through VCC, Tr2, RY3, and Tr3 so that the relay contacts are in the ON direction and power is supplied to the lamp. Since the coil of relay RY3 is self-holding, when High (5V) is applied to B2, Tr2 is turned off and power is not supplied to the relay coil.

To turn off the relay, apply Low (0V) to B1, turn on Tr1, and the current from VCC flows to the relay coil through Tr1, and if High (5V) is applied to B2, flow to Tr4 and the relay contact is OFF. Go to When the OFF operation is completed, the OFF state of the relay is maintained even if TR1 and Tr4 are turned off.

When the self-maintaining relay is used as described above, power consumption of the power supply unit is significantly reduced because power consumption is not maintained in normal state, and an electronic switch can be applied to a circuit using a relatively small lamp.

The specific effects of the present invention are as follows.

1) Since there is no current consumed to maintain relay status, the internal consumption current is extremely small, so it can be used for various lamps.

2) Because the transformer is used, the voltage drop of the power supply is extremely small and stable, and there is no fear of overheating.

3) It is composed of two wires and can be used to replace existing switches.

4) It uses constant voltage of diode without using resistor, so it can get constant power without being affected by load change.

Claims (3)

In an electronic switch connected to both ends of the lamp and connected to the first and second wires for passing a current through the lamp to electrically control the lamp, A pair of diodes connected in series between the first line and the second line, each of which is connected in parallel with opposite polarity, a transformer for boosting a voltage generated across the diode, and an AC boosted in the transformer to rectify with DC. A power supply unit 100 including a first rectifying unit and a second rectifying unit which receives power separately from the first line when the lamp is turned off to cut off the first line and the second line, Voltage stabilization unit 200, including a means for blocking the abnormal rise of the voltage generated in the power supply unit 100, It includes a relay operated by the DC voltage generated by the power supply unit 100, the relay is operated once once the current flows in the coil after the state is maintained in the self-maintained state even if the power is turned off after changing to the ON state or OFF state Electronic switch comprising a relay control unit 300 that is a relay. 2. The electronic switch of claim 1, wherein the second rectifier of the power supply unit includes a capacitor C3 connected to the first line and a bridge diode BD1 connected to the capacitor. The electronic switch as claimed in claim 1, wherein the means for blocking the abnormal voltage rise is a zener diode which maintains the output DC voltage of the power supply unit 100 below a predetermined zener voltage.