KR20130035349A - Apparatus for protecting switched-mode power supply from surge/impulse noise - Google Patents

Apparatus for protecting switched-mode power supply from surge/impulse noise Download PDF

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Publication number
KR20130035349A
KR20130035349A KR1020110099575A KR20110099575A KR20130035349A KR 20130035349 A KR20130035349 A KR 20130035349A KR 1020110099575 A KR1020110099575 A KR 1020110099575A KR 20110099575 A KR20110099575 A KR 20110099575A KR 20130035349 A KR20130035349 A KR 20130035349A
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KR
South Korea
Prior art keywords
surge
impulse noise
varistor
output path
input
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Application number
KR1020110099575A
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Korean (ko)
Inventor
이상준
Original Assignee
주식회사 포티스
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Application filed by 주식회사 포티스 filed Critical 주식회사 포티스
Priority to KR1020110099575A priority Critical patent/KR20130035349A/en
Publication of KR20130035349A publication Critical patent/KR20130035349A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/044—Physical layout, materials not provided for elsewhere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters

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  • Emergency Protection Circuit Devices (AREA)

Abstract

The present invention is connected in parallel with the power connector receiving the AC power input is a voltage generated by the surge or impulse noise, when the input voltage is greater than the set voltage is shorted to bypass the surge or impulse noise to the output path first A varistor, a second varistor connected to an output path of the first varistor and passing surge or impulse noise input from the output path to ground (GND), and installed between the second varistor and the ground, and having a primary pad And an arc-discharge unit configured of a secondary pad and a spark-gap between the primary and secondary sides to arc discharge the surge or impulse noise input from the second varistor using the potential difference between the primary side potential and the secondary side potential. To protect switching-mode power supplies (SMPS) from surge and impulse noise Relates to a value, first, by the arc discharge into the air to induce a surge or impulse noise in the second varistor via the discharge pad and protects the SMPS and the SET from the erroneous operation.

Description

Apparatus for protecting switched-mode power supply from surge / impulse noise

The present invention relates to a device for protecting a switched-mode power supply (SMPS) from surge / impulse noise, wherein the first or second varistors induce surge or impulse noise to arc through the discharge pad into the air. An apparatus for protecting a switched mode power supply (SMPS) from surge / impulse noise that discharges to protect a switched-mode power supply (SMPS) and SET from malfunction.

Conventional surge protection devices include TVS, zener diodes, varistors, and ARRESTOR.

Such TVS, Zener diodes, and varistors can protect surges up to several hundred watts.However, when surges or impulse noises occur due to power outages or lightning strikes, they can protect SMPS and SET from such surges or impulse noises. A problem that cannot be done occurs.

In addition, when the impulsive noise (overvoltage) is introduced, since the above protection elements do not block the impulse noise, impulse noise flows into the SET, causing SMPS damage and SET malfunction.

The present invention was developed to solve the above problems, surge / impulse for protecting the SMPS (Switched-Mode Power Supply) and SET from the surge or impulse noise generated by the vicinity of the power plant, power failure or lightning, etc. Its purpose is to provide a device for protecting a switched mode power supply from noise.

An apparatus for protecting a switching mode power supply (SMPS) from surge / impulse noise according to the present invention for achieving this object,

A first varistor connected in parallel with a power connector receiving AC power to receive a voltage generated by surge or impulse noise, and shorting when the input voltage is greater than or equal to a set voltage to bypass the surge or impulse noise to an output path; A second varistor connected to an output path of the first varistor and passing surge or impulse noise input from the output path to ground (GND), and installed between the second varistor and the ground, and having a primary pad and a secondary pad. And an arc-discharge unit configured to spark-gap between the primary and secondary sides to arc discharge the surge or impulse noise input from the second varistor using the potential difference between the primary side potential and the secondary side potential. do.

Preferably, the spark-gap is configured to 4 mm or less in order to accelerate discharge and prevent damage to the varistor.

The present invention is connected in parallel with the power connector receiving the AC power input is a voltage generated by the surge or impulse noise, when the input voltage is greater than the set voltage is shorted to bypass the surge or impulse noise to the output path first A varistor, a second varistor connected to an output path of the first varistor and passing surge or impulse noise input from the output path to ground (GND), and installed between the second varistor and the ground, and having a primary pad And an arc-discharge unit configured of a secondary pad and a spark-gap between the primary and secondary sides to arc discharge the surge or impulse noise input from the second varistor using the potential difference between the primary side potential and the secondary side potential. It consists of a structure consisting of the first and second varistors to induce surge or impulse noise By arc discharge into the air through a pad will protect the SMPS and the SET from the erroneous operation.

In particular, SMPS and SET can be protected even when surge or impulse noise of several tens of KV or more occurs, and it is possible to solve the problem of damage caused by continuous damage to components (eg, varistors) as in the prior art.

1A is a circuit diagram illustrating an apparatus for protecting a switched mode power supply (SMPS) from surge / impulse noise in accordance with the present invention.
1B is an actual configuration diagram of an apparatus for protecting a switching mode power supply (SMPS) from surge / impulse noise according to the present invention.

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

It is to be understood, however, that the embodiments described below are only for explanation of the embodiments of the present invention so that those skilled in the art can easily carry out the invention, It does not mean anything.

In order to clearly illustrate the present invention, portions which are not related to the description have been omitted, and like reference numerals have been assigned to similar portions throughout the specification.

Throughout the specification and claims, when a section includes a constituent, it is intended that the inclusion of the other constituent (s) does not exclude other elements unless specifically stated otherwise.

FIG. 1A illustrates a device for protecting a switched mode power supply (SMPS) from surge or impulse noise in accordance with the present invention, and FIG. 1B illustrates a switched mode power supply from surge / impulse noise in accordance with the present invention in FIG. This is an actual configuration diagram of a device for protecting (SMPS).

As shown in FIGS. 1A and 1B, the apparatus induces surge or impulse noise to the first and second varistors 102 and 103 to arc discharge to the air through discharge pads to protect SMPS and SET. The structure includes a first varistor 102, a second varistor 103, and an arc discharge unit 104.

That is, it is connected in parallel with the power connector 101 receiving the AC power input to receive the voltage generated by the surge or impulse noise, if the input voltage is more than the set voltage is shorted to bypass the surge or impulse noise to the output path A second varistor 103 connected to an output path of the first varistor 102 and the first varistor 102 to pass surge or impulse noise input from the output path to ground GND, and the second varistor. Disposed between the 103 and the ground, and composed of a primary pad, a secondary pad, and a spark-gap between the primary and secondary sides, and using the potential difference between the primary potential and the secondary potential from the second varistor 103. An arc-discharge part 104 for arc-discharging the input surge or impulse noise has a structure.

In order to accelerate discharge and prevent damage to the varistor, the spark-gap is 4 mm or less.

Here, the first varistor 102 is connected to the power connector 101, that is, in parallel with the power connector 101 receiving the AC power and the output path is connected to the second varistor 103, the power connector 102 ) Inputs the voltage generated by SURGE or IMPULSE NOISE, and when the input voltage is over the set voltage (e.g., 560V), it is short-circuited to bypass the surge or impulse noise to the output path. It is input to the second varistor 103.

The second varistor 103 is installed between the first varistor 102 and the arc-discharge part 104, that is, one end is connected to the output path of the first varistor 102 and the other end is the arc-discharge part 104. Connected to the primary side of the pad, the surge or impulse noise is input from the output path of the first varistor 102, the received surge or impulse noise to the ground (GND) substantially, arc-discharge unit 104 Pass it.

The arc discharge part 104 is provided between the second varistor 103 and the ground, and is composed of a primary pad, a secondary pad, and a spark-gap between the primary and secondary sides, and the primary potential (high potential) and two. By using the potential difference between the difference potential (low potential), the surge or impulse noise input from the second varistor 103 is arc discharged into the spark gap. A serrated discharge pad is made on the PCB copper plate to easily and quickly discharge surge or impulse noise. In addition, the discharge pad should have a minimum separation distance between the second varistor 103 and the ground GNS so that surge or impulse noise is easily discharged. In the present invention, 4mm is used and 4.0mm of air vent holes (AIR VENT HOLL) can be made to satisfy safety standards, so that there is no problem in the standard.

Hereinafter, the operation of the apparatus for protecting the switching mode power supply (SMPS) from the surge or impulse noise according to the present invention of FIGS. 1A and 1B will be described.

First, as shown in FIGS. 1A and 1B, the first varistor 102 bypasses surge or impulse noise into an output path and inputs the second varistor 103 to the second varistor 103.

That is, the voltage generated by the surge SURGE or the impulse noise is input from the power connector 101.

Then, when the input voltage is greater than or equal to the set voltage (for example, 560V), it is short-circuited and bypasses the surge or impulse noise to the output path and inputs it to the second varistor 103.

The first varistor 102 is connected in parallel with the power connector 101, that is, the power connector 101 receiving the AC power, and the output path is connected to the second varistor 103, from the power connector 101. The voltage generated by the surge or impulse noise is input.

When the input voltage is greater than or equal to a set voltage (for example, 560 V), a short circuit (ON) causes the surge or impulse noise to be bypassed to the output path and input to the second varistor 103.

Next, the second varistor 103 passes the surge or impulse noise received from the output path of the first varistor 102 to the arc-discharge unit 104.

That is, the second varistor 103 receives surge or impulse noise from the output path of the first varistor 102, and grounds the received surge or impulse noise to ground (GND) substantially, the arc discharge unit 104. Pass it to

The second varistor 103 is installed between the first varistor 102 and the arc-discharge part 104, that is, one end is connected to the output path of the first varistor 102, and the other end is the arc-discharge part 104. Connected to the primary pad of the side), and receives the surge or impulse noise from the output path of the first varistor 102, the received surge or impulse noise is ground (GND) substantially, arc-discharge unit 104 To pass.

Next, when surge or impulse noise passes to the arc-discharge unit 104, the arc discharge unit 104 uses the potential difference between the primary side potential (high potential) and the secondary side potential (low potential) to the second varistor 103. Arc discharges the surge or impulse noise input from the spark-gap.

That is, the arc discharge part 104 is provided between the second varistor 103 and the ground, and is composed of a primary pad, a secondary pad, and a spark gap between the primary and secondary sides, so that the primary potential (high potential) And the surge or impulse noise input from the second varistor 103 are arc discharged into the spark-gap by using the potential difference between the secondary potential and the secondary potential (low potential).

A serrated discharge pad is made on the PCB copper plate to easily and quickly discharge surge or impulse noise.

In addition, since the discharge pad discharges the surge or impulse noise easily when the separation distance between the second varistor 103 and the ground GNS is kept to a minimum, the separation distance is as small as possible.

For example, 4mm is used and 4.0mm of air vent hole (AIR VENT HOLL) can be made to satisfy the safety standard so that there is no problem in the standard.

As described above, the present invention is connected in parallel with the power connector receiving the AC power input to receive the voltage generated by the surge or impulse noise, when the input voltage is more than the set voltage is shorted to output the surge or impulse noise to the output path A first varistor for bypassing, a second varistor connected to an output path of the first varistor and passing surge or impulse noise input from the output path to ground (GND), and installed between the second varistor and the ground; And an arc for discharging the surge or impulse noise input from the second varistor by using a potential gap between the primary side and the secondary side and the primary side and the secondary side and the spark gap between the primary side and the secondary side. It is composed of a structure including a discharge part, and the surge or impulse noise to the first and second varistors By inducing arc discharge into the air through the discharge pad, SMPS and SET are protected from malfunction.

In particular, SMPS and SET can be protected even when surge or impulse noise of several tens of KV or more occurs, and it is possible to solve the problem of damage caused by continuous damage to components (eg, varistors) as in the prior art.

For reference, the conventional SMPS protection device is to protect the surge or impulse noise of about 2KV, there was a problem that gradually damage the parts by giving a continuous damage to the parts, SMPS protection device according to the present invention is a surge or In addition to protecting SMPS and SET from impulse noise, it was also confirmed that the above problems did not occur.

Description of the Related Art [0002]
101: power connector 102: the first varistor
103: second varistor 104: arc-discharge part

Claims (2)

A first varistor connected in parallel with a power connector receiving AC power to receive a voltage generated by surge or impulse noise, and shorting the input voltage when the input voltage is greater than or equal to a set voltage to bypass the surge or impulse noise to an output path;
A second varistor connected to an output path of the first varistor to pass a surge or impulse noise input from the output path to ground (GND); And
It is provided between the second varistor and the ground, and composed of a primary pad and a secondary pad and a spark-gap between the primary and secondary sides, inputted from the second varistor using the potential difference between the primary potential and the secondary potential. 12. An apparatus for protecting a switched mode power supply (SMPS) from surge / impulse noise comprising an arc-discharge portion that arc-discharges surge or impulse noise. The method of claim 1,
12. An apparatus for protecting a switched mode power supply (SMPS) from surge / impulse noise, characterized by configuring the spark-gap to 4 mm or less to expedite discharge and prevent damage to the varistors.

KR1020110099575A 2011-09-30 2011-09-30 Apparatus for protecting switched-mode power supply from surge/impulse noise KR20130035349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110099575A KR20130035349A (en) 2011-09-30 2011-09-30 Apparatus for protecting switched-mode power supply from surge/impulse noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110099575A KR20130035349A (en) 2011-09-30 2011-09-30 Apparatus for protecting switched-mode power supply from surge/impulse noise

Publications (1)

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KR20130035349A true KR20130035349A (en) 2013-04-09

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