KR19980011192U - SURGE Protector - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Surge protector

2. The technical problem the invention is trying to solve

In the prior art, it is intended to solve the problems of frequent operation incurred in turning off the power as a temporary measure without removing it in case of surge and economical loss that must be replaced when the fuse is shorted.

3. Summary of solution of design

A first zener diode Z1 for detecting an abnormality of the non-inverting (+) side output voltage; A first thyristor T1 that conducts when an overvoltage is detected by the first zener diode Z1 and outputs the overvoltage; A second zener diode (Z2) for detecting an abnormality of the inverted (-) side output voltage; A second thyristor T2 that conducts when the overvoltage is detected by the second zener diode Z2 and outputs the overvoltage; The first and second thyristor (T1) (T2) is characterized in that it consists of a lightning arrester (ARR) to discharge the overvoltage output from the respective thyristor (T1) (T2) to prevent the subsequent equipment from being damaged by the surge voltage.

4. Important uses of the devise

Applied to protect the downstream equipment from surge of output voltage.

Description

SURGE Protector

In general, when an instantaneous power is supplied to a network having an inductive load, a transition state occurs due to a circuit characteristic, and a steady state passes after a certain time.

This is a well-known fact in battery and electronic theory. In the case of an inductive load having a large power consumption in the above transition state, a very high abnormal current, that is, a surge current is generated.

Such a surge current affects the power supply, and seriously adversely affects the case of including several circuit elements.

For example, when using a product with high power consumption and inductive load, such as a washing machine, a microwave oven, a large fan, and the like as a home electric appliance, when a power is supplied through a switch, a high surge current occurs as described above. .

At this time, if the current stabilizer is adopted as a kind of electrical stabilizer and turns off all the power in the home when the over current flows, the above-mentioned surge current frequently causes a power failure in the house, which causes serious difficulties and hassles in using a computer. And there is a problem that adversely affects various circuit elements.

On the other hand, as a countermeasure against a surge, a method of blocking a transmission of an input voltage to an output terminal by shorting a short circuit during an overvoltage or a surge, or a method of turning off all power when overvoltage using a current breaker is used.

However, the use of the first method, the fuse has to replace the fuse again when the fuse is shorted due to overvoltage or surge, so there is an economic loss and inconvenience, and there is a problem that the rear end equipment does not operate until the fuse is replaced.

In addition, in the case of using a current breaker, there is a stable side by automatically shutting off all power during a surge, on the other hand, there is a troublesome problem that the user frequently re-power on by manual operation because the power is cut off every surge.

In particular, the above two methods are not a fundamental solution because they are a temporary measure of preventing the surge generated by turning off the power supply to the circuit rather than removing the surge generated during the surge.

Therefore, the present invention is proposed to solve all the problems of the prior art as described above,

The purpose of the present invention is to stably block the inflow of transient waveforms such as asynchronous voltage, current, power, and charge, which rapidly rise within a short time, into the latter equipment, to prevent damage to the latter equipment or device. To provide a surge protector.

Technical means for achieving the object of the present invention,

A first zener diode for detecting an abnormality of an output voltage of the inverting side of the bar; A first thyristor for conducting when the overvoltage is detected by the first zener diode and outputting the overvoltage;

A second zener diode for detecting an abnormality of the inverted (−) side output voltage;

A second thyristor for conducting when the overvoltage is detected by the second zener diode and outputting the overvoltage;

The lightning arrester is configured to discharge an overvoltage output from each of the first and second thyristors, thereby preventing a subsequent device from being damaged by a surge.

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

1 is a circuit diagram of a surge protector according to the present invention

Explanation of symbols on the main parts of the drawings

Z1, Z2: first and second zener diodes

T1, T2: first and second thyristor

ARR: Lightning Arrester

R: resistance

1 is a circuit diagram of a surge protector according to the present invention.

As shown, a first zener diode (Z1) for detecting the presence or absence of abnormality of the non-inverting (+) side output voltage; A first thyristor T1 that conducts when the overvoltage is detected by the first zener diode Z1 and outputs the overvoltage; A second zener diode (Z2) for detecting an abnormality of the inverted (-) side output voltage; A second thyristor T2 that conducts when the overvoltage is detected by the second zener diode Z2 and outputs the overvoltage; The surge arrester ARR is configured to discharge the overvoltage output from the first and second thyristors T1 and T2, respectively, to prevent the subsequent equipment from being damaged by the surge.

In the drawings, reference numeral R denotes a resistor.

Referring to the operation of the surge protector according to the present invention configured as described above are as follows.

First, the AC power supply AC110V / AC220V removes line noise by a voltage supply unit (not shown) connected to an input terminal, and voltage is controlled to be transferred to a later device in an arbitrary voltage form.

At this time, the surge protector according to the present invention formed on the front end of the rear end device detects the output voltage delivered to the rear end device and removes it during surge.

That is, as illustrated in FIG. 1, the + side power source of the output power is compared with the zener voltage preset in the first zener diode Z1, and when the + side output voltage is smaller than the zener voltage (normal state). The first thyristor T1 is turned off and the + side output voltage is transmitted to the subsequent device.

In addition, the negative side power of the output power is compared with the zener voltage preset in the second zener diode Z2, and when the negative side output voltage is smaller than the set zener voltage (normal state), the second thyristor T2 is turned off. -Side output voltage is also normally transmitted to the downstream equipment.

Next, when the output + and-voltages are relatively higher than the zener voltages set in the first and second zener diodes Z1 and Z2, respectively, when the surge is detected, the first and second thyristors T1 ( T2) is conducted.

The + and-side output voltages outputted to the rear-end equipment by the conduction of the first and second thyristors T1 and T2 are respectively connected to the first and second thyristors T1 and T2 through the lightning arrester ARR. ) Is entered.

Then, the arrester ARR discharges and blocks the surge voltage from flowing into the latter device, thereby preventing damage to the latter device during the surge.

Here, the arrester, as is well known, protects the line, communication equipment, buildings, human life, etc. from high voltage when there is a lightning strike, ground fault of transmission and distribution line, impact voltage by contact or induction of power line and communication line, and other abnormal voltages. It is a device for protection, and there are several as follows.

1) carbon arrester; It is a lightning arrester that inserts an insulating material such as thin mica between two carbon plates and discharges an abnormal voltage therebetween. It is easily discharged and does not dissolve because the surface of the carbon plate is composed of a number of pointed ends.

2) vacuum arrester; It is a lightning arrester which is sealed together with inert gas (argon, neon, etc.) of about several mmHg in a glass tube vacuumed between two electrodes and discharges it between electrode gaps.The discharge voltage is uniform and the discharge start voltage varies depending on the application. There is a kind.

3) lightning arresters; One type of vacuum arrester, especially for the protection of equipment using ICs by surge voltage.

4) Self-contained lightning arrester: A lightning arrester with two pole plates (one of which is bimetallic) when the gas is discharged from the discharge tube, the electrode is protected by a bimetallic mechanism and able to withstand several tens of repeated discharges.

Therefore, in the present invention, a suitable lightning arrester is selected and applied according to the characteristics of the rear end equipment among the above lightning arresters.

As described above, the present invention has the effect of preventing the damage or malfunction of the rear end equipment by preventing it from being discharged when the surge is applied to the rear end equipment.

In addition, when the surge is removed, the power is automatically turned back on to the rear end device, thereby improving convenience of use.

The present invention relates to a surge protector, and in particular, it stably blocks the inflow of transient waveforms such as asynchronous voltage, current, power, and charge, which rapidly rise within a short time, into the rear end equipment, thereby damaging the rear end equipment. The present invention relates to a surge protector that prevents the damage.

Claims (1)

In the surge protector to protect the downstream equipment during surge, A first zener diode (Z1) for detecting abnormality of the non-inverting (+) side output voltage; A first thyristor T1 that conducts when the overvoltage is detected by the first zener diode Z1 and outputs the overvoltage; A second zener diode (Z2) for detecting an abnormality of the inverted (-) side output voltage; A second thyristor T2 that conducts when the overvoltage is detected by the second zener diode Z2 and outputs the overvoltage; And a surge arrester (ARR) for discharging the overvoltage output from the first and second thyristors (T1) (T2), respectively, to prevent the subsequent equipment from being damaged by the surge.