CN212740370U - Surge protection circuit for escalator control system - Google Patents

Surge protection circuit for escalator control system Download PDF

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CN212740370U
CN212740370U CN202020687355.3U CN202020687355U CN212740370U CN 212740370 U CN212740370 U CN 212740370U CN 202020687355 U CN202020687355 U CN 202020687355U CN 212740370 U CN212740370 U CN 212740370U
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control system
capacitor
escalator control
gas discharge
protection unit
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钟毅
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Ningbo Hongda Elevator Co Ltd
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Ningbo Hongda Elevator Co Ltd
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Abstract

The invention belongs to the technical field of escalator control, and provides a surge protection circuit for an escalator control system, which comprises an R end, an S end, a T end and a grounded PE end for connecting the escalator control system, and is characterized by also comprising an RS clamping protection unit, an ST clamping protection unit, an RT clamping protection unit, an RPE clamping protection unit, an SPE clamping protection unit, a TPE clamping protection unit, a capacitor Cx1, a capacitor Cx2, a capacitor Cx3, a capacitor Cy1, a capacitor Cy2 and a capacitor Cy3, wherein the surge protection circuit can be combined in series through a piezoresistor and a ceramic gas discharge tube, is arranged on an input power supply of the escalator control system according to the configuration modes of phase lines and phase lines, and phase lines and ground lines, absorbs transient overvoltage surge waves on the power supply, and further comprises a Cx differential mode capacitor and a Cy common mode capacitor, filters the power supply and eliminates differential mode and common mode interference, the escalator control system can be ensured to run safely and reliably.

Description

Surge protection circuit for escalator control system
Technical Field
The utility model belongs to the technical field of escalator control, concretely relates to surge protection circuit for escalator control system.
Background
At present, an independent surge protection circuit is not arranged in an escalator control system, surge voltage on a power grid is absorbed by a surge protector in a user distribution box completely, and the surge protector on user power distribution equipment can not meet the safety protection requirements of all parts of the escalator control system completely due to the consideration of the particularity of the performance of all elements of the escalator control system, so that the escalator control system is easy to cause when light people are in thunderstorm weather, the light people are interfered to stop the escalator abnormally, and the heavy people damage control elements.
Disclosure of Invention
The utility model aims to solve the technical problem to the current situation of prior art, and provide a surge protection circuit for escalator control system who guarantees that escalator control system can safe and reliable operation.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the surge protection circuit for the escalator control system comprises an R end, an S end, a T end and a grounded PE end, and is characterized by further comprising an RS clamping protection unit, an ST clamping protection unit, an RT clamping protection unit, an RPE clamping protection unit, an SPE clamping protection unit, a TPE clamping protection unit, a capacitor Cx1, a capacitor Cx2, a capacitor Cx3, a capacitor Cy1, a capacitor Cy2 and a capacitor Cy 3;
the two ends of the RS clamping protection unit are respectively connected with the R end and the S end of the escalator control system and are used for clamping and protecting the voltage of the R end and the S end of the escalator control system;
two ends of the ST clamping protection unit are respectively connected with an S end and a T end of the escalator control system and used for clamping and protecting the voltage of the S end and the T end of the escalator control system;
two ends of the RT clamping protection unit are respectively connected with an R end and a T end of the escalator control system and are used for clamping protection of the voltage of the R end and the T end of the escalator control system;
two ends of the RPE clamping protection unit are respectively connected with an R end and a PE end of the escalator control system and are used for clamping and protecting the voltage of the R end and the PE end of the escalator control system;
the two ends of the SPE clamping protection unit are respectively connected with the S end and the PE end of the escalator control system and used for clamping protection of the voltage of the S end and the PE end of the escalator control system;
two ends of the TPE clamping protection unit are respectively connected with a T end and a PE end of the escalator control system and are used for clamping and protecting the T end and the PE end voltage of the escalator control system;
one end of the capacitor Cx1 is connected with the R end of the escalator control system, the other end of the capacitor Cx1 is connected with one end of the capacitor Cx2 and one end of the capacitor Cx3, the other end of the capacitor Cx2 is connected with the S end of the escalator control system, and the other end of the capacitor Cx3 is connected with the T end of the escalator control system; one end of a capacitor Cy1 is connected with the R end of the escalator control system, the other end of the capacitor Cy1 is connected with one end of a capacitor Cy2, one end of a capacitor Cy3 and the grounded PE end, the other end of the capacitor Cy2 is connected with the S end of the escalator control system, and the other end of the capacitor Cy3 is connected with the T end of the escalator control system.
Further, the capacitance Cx1, the capacitance Cx2, and the capacitance Cx3 are all X-ampere capacitors.
Further, the capacitance Cy1, the capacitance Cy2, and the capacitance Cy3 are all Y-ampere capacitors.
Further, the RS clamp protection unit includes a first ceramic gas discharge tube GD1 and a first varistor RV 1;
one end of the first ceramic gas discharge tube GD1 is connected with the R end of the escalator control system, one end of the RT clamp protection unit and one end of the RPE clamp protection unit, the other end of the first ceramic gas discharge tube GD1 is connected with one end of the first piezoresistor RV1, and the other end of the first piezoresistor RV1 is connected with the S end of the escalator control system, one end of the ST clamp protection unit and one end of the SPE clamp protection unit.
Further, the ST clamp protection unit includes a second ceramic gas discharge tube GD2 and a second varistor RV 2;
one end of the second ceramic gas discharge tube GD2 is connected with the S end of escalator control system, the one end of the first piezoresistor RV1 and the one end of SPE clamp protection unit, the other end of the first piezoresistor RV1 is connected with the R end of escalator control system through the first ceramic gas discharge tube GD1, the other end of the second ceramic gas discharge tube GD2 is connected with the one end of the second piezoresistor RV2, and the other end of the second piezoresistor RV2 is connected with the T end of escalator control system, the one end of RT clamp protection unit and the one end of clamp TPE protection.
Further, the RT clamp protection unit includes a third ceramic gas discharge tube GD3 and a third varistor RV 3;
one end of the third ceramic gas discharge tube GD3 is connected with the R end of the escalator control system and one end of the RPE clamping protection unit, the other end of the third ceramic gas discharge tube GD3 is connected with one end of the third piezoresistor RV3, and the other end of the third piezoresistor RV3 is connected with the T end of the escalator control system and one end of the TPE clamping protection unit respectively.
Further, the RPE clamp protection unit includes a fourth ceramic gas discharge tube GD4 and a fourth varistor RV 4;
one end of the fourth ceramic gas discharge tube GD4 is connected with a grounding end PE, the other end of the fourth ceramic gas discharge tube GD4 is connected with one end of a fourth piezoresistor RV4, and the other end of the fourth piezoresistor RV4 is connected with one end of a third ceramic gas discharge tube GD3, one end of a capacitor Cy1 at one end of a first ceramic gas discharge tube GD1, one end of a capacitor Cx1 and the R end of an escalator control system.
Further, the SPE clamp protection unit comprises a fifth ceramic gas discharge tube GD5 and a fifth piezoresistor RV 5;
one end of the fifth ceramic gas discharge tube GD5 is connected with a grounding end PE, the other end of the fifth ceramic gas discharge tube GD5 is connected with one end of a fifth piezoresistor RV5, and the other end of the fifth piezoresistor RV5 is connected with one end of the first piezoresistor RV1, the second ceramic gas discharge tube GD2, one end of a capacitor Cy2, one end of a capacitor Cx2 and the S end of the escalator control system.
Further, the TPE clamping protection unit comprises a sixth ceramic gas discharge tube GD6 and a sixth piezoresistor RV 6;
one end of the sixth ceramic gas discharge tube GD6 is connected with a grounding end PE, the other end of the sixth ceramic gas discharge tube GD6 is connected with one end of a sixth piezoresistor RV6, and the other end of the sixth piezoresistor RV6 is connected with one end of a third piezoresistor RV3, one end of a second piezoresistor RV2, one end of a capacitor Cy/3, one end of a capacitor Cx3 and the T end of the escalator control system.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) this a surge protection circuit for escalator control system adopts piezo-resistor and ceramic gas discharge tube to carry out series combination after, separates piezo-resistor and power through X ann rule electric capacity and Y ann rule electric capacity for the leakage current of this surge protection circuit in escalator control system is extremely low. In addition, if the piezoresistor has short circuit failure phenomenon in the surge energy absorption process, the piezoresistor can also be separated by the ceramic gas discharge tube to play a role in safety protection;
(2) the surge protection circuit for the escalator control system comprises a Cx differential mode capacitor and a Cy common mode capacitor, filters a power supply, eliminates differential mode and common mode interference, and ensures that the escalator control system can operate safely and reliably.
Drawings
Fig. 1 is a schematic circuit diagram of the surge protection panel of the main power circuit for an escalator control system.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Examples
The embodiment provides a surge protection circuit for escalator control system, as shown in fig. 1, this surge protection circuit for escalator control system includes: the ceramic lamp comprises a first ceramic gas discharge tube GD1, a second ceramic gas discharge tube GD2, a third ceramic gas discharge tube GD3, a fourth ceramic gas discharge tube GD4, a fifth ceramic gas discharge tube GD5, a sixth ceramic gas discharge tube GD6, a first piezoresistor RV1, a second piezoresistor RV2, a third piezoresistor RV3, a fourth piezoresistor RV4, a fifth piezoresistor RV5, a sixth piezoresistor RV6, a capacitor Cx1, a capacitor Cx2, a capacitor Cx3, a capacitor Cy1, a capacitor Cy2 and a capacitor Cy 3.
The first ceramic gas discharge tube GD1, the second ceramic gas discharge tube GD2, the third ceramic gas discharge tube GD3, the fourth ceramic gas discharge tube GD4, the fifth ceramic gas discharge tube GD5 and the sixth ceramic gas discharge tube GD6 are discharge tubes capable of preventing lightning stroke and are used for protecting escalator control system equipment and parts from being capable of resisting instantaneous overvoltage impact higher than normal working voltage.
The first piezoresistor RV1, the second piezoresistor RV2, the third piezoresistor RV3, the fourth piezoresistor RV4, the fifth piezoresistor RV5 and the sixth piezoresistor RV6 are voltage limiting type elements sensitive to voltage change, and are used for limiting harmful surge voltage and effectively protecting systems or elements. After each piezoresistor and the ceramic gas discharge tube are combined in series, the piezoresistors are arranged on an input power supply of the escalator control system according to the configuration mode of phase lines and the configuration mode of phase lines and ground lines.
The capacitor Cx1, the capacitor Cx2 and the capacitor Cx3 are X safety capacitors and are arranged between the phase lines of the input power supply after being combined in series, so that the differential mode interference on the power supply is eliminated, and the effect of suppressing the electromagnetic interference of the power supply is achieved.
The capacitor Cy1, the capacitor Cy2 and the capacitor Cy3 are Y safety capacitors and are arranged between an input power phase line and a ground line, common mode interference on a power supply is eliminated, and the effect of suppressing power supply electromagnetic interference is achieved.
One end of the first ceramic gas discharge tube GD1 is connected with one end of a capacitor Cx1, one end of a capacitor Cy1, the R end of the escalator control system, one end of a third ceramic gas discharge tube GD3 and one end of a fourth piezoresistor RV4, the other end of the fourth piezoresistor RV4 is connected with one end of a fourth ceramic gas discharge tube GD4, the other end of the fourth ceramic gas discharge tube GD4 is connected with a grounded PE end, the other end of the first ceramic gas discharge tube GD1 is connected with one end of a first piezoresistor RV1, and the other end of the first piezoresistor RV1 is connected with the S end of the escalator control system, one end of a capacitor Cx2, one end of a capacitor Cy2, one end of a second ceramic gas discharge tube GD2 and one end of a fifth piezoresistor RV 5;
the other end of the capacitor Cx1 is connected with one ends of the capacitor Cx2 and the capacitor Cx3, the other end of the capacitor Cy1 is connected with a grounded PE end, the other end of the fourth piezoresistor RV4 is connected with a grounded PE end, the other end of the third ceramic gas discharge tube GD3 is connected with one end of the third piezoresistor RV3, the other end of the third piezoresistor RV3 is connected with one end of the capacitor Cx3, one end of the capacitor Cy3, the other end of the second piezoresistor RV2 and one end of the sixth piezoresistor RV6, the other end of the capacitor Cy2 and the other end of the capacitor Cy3 are grounded, the other end of the sixth piezoresistor RV6 is connected with one end of the sixth ceramic gas discharge tube GD6, and the other end of the sixth ceramic gas discharge.
Cx1 and Cx2 are connected in series and then are connected in parallel at the R end and the S end, Cx2 and Cx3 are connected in series and then are connected in parallel at the T end and the S end, Cx1 and Cx3 are connected in series and then are connected in parallel at the R end and the T end, the power supply filtering effect is achieved, and meanwhile the filtering interference suppression effect is achieved on the differential mode interference of the power supply.
Cy1 is connected in parallel at the R end and the PE end, Cy2 is connected in parallel at the S end and the PE end, and Cy3 is connected in parallel at the T end and the PE end, so that the common mode interference on the power supply is eliminated.
The specific working principle is as follows:
when instantaneous surge overvoltage exists on a main power supply circuit input to an R end, an S end and a T terminal of an escalator control system, the surge protection circuit clamps and protects the voltage of the R end and the S end of the escalator control system through a first piezoresistor RV1 and a first ceramic gas discharge tube GD1, clamps and protects the voltage of the S end and the T end through a second piezoresistor RV2 and a second ceramic gas discharge tube GD2, clamps and protects the voltage of the R end and the T end through a third piezoresistor RV3 and a third ceramic gas discharge tube GD3, clamps and protects the voltage of the R end and the voltage of the PE end through a fourth piezoresistor RV4 and a fourth ceramic gas discharge tube GD4, clamps and protects the voltage of the S end and the grounded PE end through a fifth piezoresistor RV5 and a fifth ceramic gas discharge tube GD5, and clamps and protects the voltage of the T end and the grounded PE end through a sixth piezoresistor RV6 and a sixth ceramic gas discharge tube GD6, each loop absorbs the surge voltage energy generated by surge, and all parts of the escalator control system are ensured to run safely and reliably.
When transient voltage does not exist on the power supply, each ceramic gas discharge tube separates the piezoresistor from the power supply, so that the leakage current of the surge protection circuit for the escalator control system is extremely low. If the piezoresistor has short circuit failure phenomenon in the surge energy absorption process, the piezoresistor can also be separated by the ceramic gas discharge tube, so that the safety protection effect is realized.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein will be apparent to those skilled in the art without departing from the scope and spirit of the invention as defined in the accompanying claims.

Claims (9)

1. A surge protection circuit for an escalator control system comprises an R end, an S end, a T end and a grounded PE end, and is characterized by further comprising an RS clamping protection unit, an ST clamping protection unit, an RT clamping protection unit, an RPE clamping protection unit, an SPE clamping protection unit, a TPE clamping protection unit, a capacitor Cx1, a capacitor Cx2, a capacitor Cx3, a capacitor Cy1, a capacitor Cy2 and a capacitor Cy 3;
the two ends of the RS clamping protection unit are respectively connected with the R end and the S end of the escalator control system and are used for clamping and protecting the voltage of the R end and the S end of the escalator control system;
two ends of the ST clamping protection unit are respectively connected with an S end and a T end of the escalator control system and used for clamping and protecting the voltage of the S end and the T end of the escalator control system;
two ends of the RT clamping protection unit are respectively connected with an R end and a T end of the escalator control system and are used for clamping protection of the voltage of the R end and the T end of the escalator control system;
two ends of the RPE clamping protection unit are respectively connected with an R end and a PE end of the escalator control system and are used for clamping and protecting the voltage of the R end and the PE end of the escalator control system;
the two ends of the SPE clamping protection unit are respectively connected with the S end and the PE end of the escalator control system and used for clamping protection of the voltage of the S end and the PE end of the escalator control system;
two ends of the TPE clamping protection unit are respectively connected with a T end and a PE end of the escalator control system and are used for clamping and protecting the T end and the PE end voltage of the escalator control system;
one end of the capacitor Cx1 is connected with the R end of the escalator control system, the other end of the capacitor Cx1 is connected with one end of the capacitor Cx2 and one end of the capacitor Cx3, the other end of the capacitor Cx2 is connected with the S end of the escalator control system, and the other end of the capacitor Cx3 is connected with the T end of the escalator control system; one end of a capacitor Cy1 is connected with the R end of the escalator control system, the other end of the capacitor Cy1 is connected with one end of a capacitor Cy2, one end of a capacitor Cy3 and the grounded PE end, the other end of the capacitor Cy2 is connected with the S end of the escalator control system, and the other end of the capacitor Cy3 is connected with the T end of the escalator control system.
2. The surge protection circuit for an escalator control system according to claim 1, wherein capacitances Cx1, Cx2 and Cx3 are all X-safety capacitors.
3. The surge protection circuit for the escalator control system according to claim 2, wherein the capacitor Cy1, the capacitor Cy2 and the capacitor Cy3 are Y-type safety capacitors.
4. The surge protection circuit for the escalator control system according to claim 3, wherein the RS clamp protection unit comprises a first ceramic gas discharge tube GD1 and a first varistor RV 1;
one end of the first ceramic gas discharge tube GD1 is connected with the R end of the escalator control system, one end of the RT clamp protection unit and one end of the RPE clamp protection unit, the other end of the first ceramic gas discharge tube GD1 is connected with one end of the first piezoresistor RV1, and the other end of the first piezoresistor RV1 is connected with the S end of the escalator control system, one end of the ST clamp protection unit and one end of the SPE clamp protection unit.
5. The surge protection circuit for escalator control systems according to claim 4, wherein the ST clamp protection unit comprises a second ceramic gas discharge tube GD2 and a second varistor RV 2;
one end of the second ceramic gas discharge tube GD2 is connected with the S end of escalator control system, the one end of the first piezoresistor RV1 and the one end of SPE clamp protection unit, the other end of the first piezoresistor RV1 is connected with the R end of escalator control system through the first ceramic gas discharge tube GD1, the other end of the second ceramic gas discharge tube GD2 is connected with the one end of the second piezoresistor RV2, and the other end of the second piezoresistor RV2 is connected with the T end of escalator control system, the one end of RT clamp protection unit and the one end of clamp TPE protection.
6. The surge protection circuit for the escalator control system according to claim 5, wherein the RT clamp protection unit comprises a third ceramic gas discharge tube GD3 and a third piezoresistor RV 3;
one end of the third ceramic gas discharge tube GD3 is connected with the R end of the escalator control system and one end of the RPE clamping protection unit, the other end of the third ceramic gas discharge tube GD3 is connected with one end of the third piezoresistor RV3, and the other end of the third piezoresistor RV3 is connected with the T end of the escalator control system and one end of the TPE clamping protection unit respectively.
7. The surge protection circuit for escalator control systems according to claim 6, wherein the RPE clamp protection unit comprises a fourth ceramic gas discharge tube GD4 and a fourth varistor RV 4;
one end of the fourth ceramic gas discharge tube GD4 is connected with a grounding end PE, the other end of the fourth ceramic gas discharge tube GD4 is connected with one end of a fourth piezoresistor RV4, and the other end of the fourth piezoresistor RV4 is connected with one end of a third ceramic gas discharge tube GD3, one end of a capacitor Cy1 at one end of a first ceramic gas discharge tube GD1, one end of a capacitor Cx1 and the R end of an escalator control system.
8. The surge protection circuit for escalator control systems according to claim 7, wherein the SPE clamp protection unit comprises a fifth ceramic gas discharge tube GD5 and a fifth varistor RV 5;
one end of the fifth ceramic gas discharge tube GD5 is connected with a grounding end PE, the other end of the fifth ceramic gas discharge tube GD5 is connected with one end of a fifth piezoresistor RV5, and the other end of the fifth piezoresistor RV5 is connected with one end of the first piezoresistor RV1, the second ceramic gas discharge tube GD2, one end of a capacitor Cy2, one end of a capacitor Cx2 and the S end of the escalator control system.
9. The surge protection circuit for escalator control systems according to claim 8, wherein the TPE clamp protection unit comprises sixth ceramic gas discharge tube GD6 and sixth varistor RV 6;
one end of the sixth ceramic gas discharge tube GD6 is connected with a grounding end PE, the other end of the sixth ceramic gas discharge tube GD6 is connected with one end of a sixth piezoresistor RV6, and the other end of the sixth piezoresistor RV6 is connected with one end of a third piezoresistor RV3, one end of a second piezoresistor RV2, one end of a capacitor Cy/3, one end of a capacitor Cx3 and the T end of the escalator control system.
CN202020687355.3U 2020-04-29 2020-04-29 Surge protection circuit for escalator control system Active CN212740370U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020687355.3U CN212740370U (en) 2020-04-29 2020-04-29 Surge protection circuit for escalator control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020687355.3U CN212740370U (en) 2020-04-29 2020-04-29 Surge protection circuit for escalator control system

Publications (1)

Publication Number Publication Date
CN212740370U true CN212740370U (en) 2021-03-19

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Application Number Title Priority Date Filing Date
CN202020687355.3U Active CN212740370U (en) 2020-04-29 2020-04-29 Surge protection circuit for escalator control system

Country Status (1)

Country Link
CN (1) CN212740370U (en)

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