CN112993943A - Driving protection circuit of vacuum circuit breaker - Google Patents
Driving protection circuit of vacuum circuit breaker Download PDFInfo
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- CN112993943A CN112993943A CN202110322003.7A CN202110322003A CN112993943A CN 112993943 A CN112993943 A CN 112993943A CN 202110322003 A CN202110322003 A CN 202110322003A CN 112993943 A CN112993943 A CN 112993943A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
- H02H7/205—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment for controlled semi-conductors which are not included in a specific circuit arrangement
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Abstract
The invention relates to the technical field of distribution automation, in particular to a drive protection circuit of a vacuum circuit breaker, which comprises a Q1 drive tube protection and a Q3 drive tube protection; the Q1 driving tube protection is subjected to common mode surge pulse suppression protection by VD1 and VD2 in RV2 and D3 rectifier bridges, differential mode surge pulse suppression protection by VD1 and VD2 in RV1 and D3 rectifier bridges, and VD1 in D3 rectifier bridges is a vacuum circuit breaker opening coil electric energy elimination diode. The D3 rectifier bridge interior VD2 is a reverse voltage protection diode. The Q3 driving tube protection is subjected to common mode surge pulse suppression protection by VD3 and VD4 in RV2 and D3 rectifier bridges, differential mode surge pulse suppression protection by VD3 and VD4 in RV1 and D3 rectifier bridges, and VD3 in D3 rectifier bridges is a vacuum circuit breaker opening coil electric energy elimination diode. The D3 rectifier bridge interior VD4 is a reverse voltage protection diode. The invention reduces the cost, simplifies the production process, increases the reverse voltage protection and has strong market application prospect.
Description
Technical Field
The invention relates to the technical field of power distribution automation, in particular to a drive protection circuit of a vacuum circuit breaker.
Background
The conventional vacuum circuit breaker driving protection circuit is shown in figure 1: a; the Q3 drive tube protection is protected by RV8, RV5, RV2 and FDG1 common mode surge pulse suppression. B; RV6, RV3, RV9, RV10 and L3 differential mode surge pulse suppression protection. Because the voltage dependent resistor characteristic uses the model selection V1MA ═ 1.5VP ═ 2.2VAC, the Q3 is damaged and damaged in Q3 due to the positive 1.5VP reverse voltage of the differential mode surge pulse. C; d2 vacuum circuit breaker closing coil electric energy eliminates diode. A; the Q2 driving tube is protected by RV8, RV5, RV1 and FDG1 common-mode surge pulse suppression protection, B; RV7, RV4, RV9, RV10 and L3 differential mode surge pulse suppression protection. Since the varistor characteristics are obtained by using the model selection V1MA of 1.5VP of 2.2VAC, the Q3 is damaged or broken by the reverse voltage of 1.5VP at Q3 when the differential mode surge pulse is positive. C; d1 electric energy elimination diode of vacuum circuit breaker opening coil. The circuit is complicated, the cost is high, the production process is complicated, and because the voltage dependent resistor characteristic uses the model V1MA which is 1.5VP which is 2.2VAC, the differential mode surge pulse is positive, and 1.5VP reverse voltage causes damage and damage to the switch tube in the control switch tube.
The existing circuit is complicated, the cost is high, the production process is complicated, and because the voltage dependent resistor characteristic uses the model V1MA which is 1.5VP 2.2VAC, the differential mode surge pulse is positive, and 1.5VP reverse voltage causes damage and damage to the switch tube in the control switch tube.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a vacuum circuit breaker driving protection circuit which is used for reducing the cost, simplifying the production process, increasing the reverse voltage protection and solving the problems that the differential mode surge pulse is positive and the switch tube is damaged and damaged by 1.5VP reverse voltage in the control switch tube because the voltage dependent resistor characteristic uses the selection type V1MA which is 1.5VP which is 2.2 VAC.
The invention is realized by the following technical scheme:
the invention discloses a vacuum circuit breaker drive protection circuit which is characterized by comprising a Q1 drive tube protection circuit and a Q3 drive tube protection circuit, wherein the Q1 drive tube protection circuit comprises a first protection circuit and a second protection circuit; the Q1 driving tube protection is performed by RV2, VD1 and VD2 in a D3 rectifier bridge and common-mode surge pulse suppression protection, the RV1 and VD1 and VD2 differential-mode surge pulse suppression protection in the D3 rectifier bridge, the VD1 in the D3 rectifier bridge is a vacuum circuit breaker opening coil electric energy elimination diode, and the VD2 in the D3 rectifier bridge is an anti-reverse voltage protection diode;
the Q3 driving tube protection is subjected to common mode surge pulse suppression protection by VD3 and VD4 in RV2 and D3 rectifier bridges, differential mode surge pulse suppression protection by VD3 and VD4 in RV1 and D3 rectifier bridges, VD3 in D3 rectifier bridges is a vacuum circuit breaker opening coil electric energy elimination diode, and VD4 in D3 rectifier bridges is an anti-reverse voltage protection diode.
Furthermore, the common-mode surge pulse suppression protection of the interior VD1 and VD2 of the RV2 and D3 rectifier bridge is as follows:
a, enabling a surge pulse voltage VSW positive and PE negative RV2 pin 1 to flow to an RV2 pin 2 loop;
b, surge pulse voltage D3 has positive point at pin 2 and negative point PE, current enters pin 2 of D3 and flows out of pin 1 of RV2 to a pin 2 loop of RV2 through VD1 and D3 in a rectifier bridge;
c surge pulse voltage VSW negative, PE positive, RV2 pin 2 flows to RV2 pin 1 loop;
d, surge pulse voltage D3 has negative point of the 2 nd pin and positive PE, current enters the 2 nd and 1 st pins of RV2, flows to the 4 th pin of D3 through the 1 st and 2 nd pins of RV1, and flows out of a loop through VD2 and D3 in a rectifier bridge;
e, the surge pulse voltage GND is positive, the PE is negative, and the current enters a 4 th pin of D3 and flows to a 2 nd pin loop of RV2 through VD2, VD4, VD1, VD3 and D3 which flow out of an RV2 at the 1 st pin in a rectifier bridge;
f surge pulse voltage GND negative, PE positive, current enters RV2 pin 2 and flows out of the loop through RV2 pin 1 to RV1 pin 1 and RV1 pin 2.
Furthermore, the differential mode surge pulse suppression protection of VD1 and VD2 inside the RV1 and D3 rectifier bridges is as follows:
a, surge pulse voltage VSW is positive, GND is negative, and surge pulse current enters a 1 st pin of RV1 and flows to a 2 nd pin loop of RV 1;
b, surge pulse voltage VSW negative and GND positive surge pulse current enters a 4 th pin of D3 and flows out of a loop through VD2, VD4, VD1, VD3 and a 1 st pin of D3 in a rectifier bridge;
c surge pulse voltage D3 pin 2 positive, VSW negative: the surge pulse current enters a No. 2 pin of D3 and flows out of a loop through a VD1 pin and a No. 1 pin of D3 in a rectifier bridge;
d, surge pulse voltage D3, a 2 nd pin point is negative, GND is positive, and inrush pulse current enters a 4 th pin of D3 and flows out of a loop through VD2 and a 2 nd pin of D3 in a rectifier bridge;
e surge pulse voltage D3 pin 2 positive, GND negative, inrush pulse current into pin 2 of D3, pin 1 of D3 into pin 1 of RV1 to pin 2 of RV 2.
Furthermore, the common-mode surge pulse suppression protection of the interior VD3 and VD4 of the RV2 and D3 rectifier bridge is as follows:
a, enabling a surge pulse voltage VSW positive and PE negative RV2 pin 1 to flow to an RV2 pin 2 loop;
b, surge pulse voltage D3 pin 3 is positive, PE is negative, current enters a pin 3 of D3, flows out of a pin 1 of RV2 through VD3 and a pin 1 of D3 in a rectifier bridge, and flows to a pin 2 loop of RV 2;
c surge pulse voltage VSW negative, PE positive, RV2 pin 2 flows to RV2 pin 1 loop;
d, the surge pulse voltage D3 has a negative 3 rd pin point and a positive PE pin, and the current enters an RV2 2 nd pin and an RV2 1 st pin and flows to a D3 4 th pin through the RV1 1 st pin and the RV1 2 nd pin and flows out of a loop through VD4 and D3 3 rd pins in the rectifier bridge;
e, the surge pulse voltage GND is positive, the PE is negative, the current enters a 4 th pin of D3 and flows to a 2 nd pin loop of RV2 through VD4, VD2, VD1 and VD3 in a rectifier bridge, and a 1 st pin of RV2 flowing out of a D3 is connected to a 2 nd pin loop of the RV 2;
f surge pulse voltage GND negative, PE positive, current enters RV2 pin 2 and flows out of the loop through RV2 pin 1 to RV1 pin 1 and RV1 pin 2.
Furthermore, the differential mode surge pulse suppression protection of VD3 and VD4 inside the RV1 and D3 rectifier bridges is as follows:
a, surge pulse voltage VSW is positive, GND is negative, and surge pulse current enters a 1 st pin of RV1 and flows to a 2 nd pin loop of RV 2;
b, the surge pulse voltage VSW is negative, the GND positive surge pulse current enters a No. 4 pin of D3 and flows out of a No. 1 loop through VD4, VD2, VD1, VD3 and D3 in a rectifier bridge;
c surge pulse voltage D3 pin 3 positive, VSW negative: the surge pulse current enters a 3 rd pin of D3 and flows out of a loop through a VD3 pin and a 1 st pin of D3 in a rectifier bridge;
d, the surge pulse voltage D3 has a negative 3 rd pin point, a positive GND pin point and a surge pulse current entering a 4 th pin of the D3 and flowing out of a loop through a VD4 pin and a 3 rd pin of the D3 in a rectifier bridge;
e surge pulse voltage D3 pin 3 positive, GND negative, inrush pulse current into pin 3 of D3, D3 flow 1 into RV1 pin 1 to RV2 pin 2 loop.
Furthermore, in the Q1 driving tube protection, when the Q1 is disconnected, the 6 th pin of the opening coil magnet of the vacuum circuit breaker is positive voltage, the 4 th pin is negative voltage, current enters the 2 nd pin of the D3 and flows out of a loop through the VD1 in the rectifier bridge and the 1 st pin of the D3, and the electromagnetic energy elimination of the opening coil is completed.
Furthermore, in the Q1 driving tube protection, when the Q1 reverse voltage protection is performed when the GND positive voltage is applied to the Q1 and the 2 nd pin is applied to the negative voltage, the current enters the D3 4 th pin and flows out of a loop through the VD2 and the D3 nd pin inside the rectifier bridge.
Furthermore, in the Q3 driving tube protection, when the Q3 is disconnected, the 1 st pin of the closing coil of the vacuum circuit breaker is positive voltage, the 2 nd pin is negative voltage, current enters the 3 rd pin of the D3 and flows out of a loop through the VD3 and the 1 st pin of the D3 in the rectifier bridge, and the electric energy elimination of the closing coil is completed.
Furthermore, in the Q3 driving tube protection, Q3 reverse voltage protection; when the GND positive voltage Q3 is the 2 nd pin negative voltage, the current enters the 4 th pin of D3 and flows out of the loop through VD4 and the 3 rd pin of D3 in the rectifier bridge.
The invention has the beneficial effects that:
the invention solves the problems that the differential mode surge pulse is positive and the 1.5VP reverse voltage causes the damage and the damage of the switch tube when controlling the switch tube because the voltage dependent resistor characteristic uses the model selection V1MA which is 1.5VP which is 2.2VAC, and simultaneously reduces the cost, simplifies the production process and increases the reverse voltage protection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a conventional vacuum circuit breaker driving protection circuit;
fig. 2 is a schematic diagram of a drive protection circuit of a vacuum circuit breaker.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment discloses a drive protection circuit of a vacuum circuit breaker as shown in fig. 2, which comprises a Q1 drive tube protection circuit and a Q3 drive tube protection circuit; the Q1 driving tube protection is performed by RV2, VD1 and VD2 in a D3 rectifier bridge and common-mode surge pulse suppression protection, the RV1 and the VD1 and VD2 in a D3 rectifier bridge are performed differential-mode surge pulse suppression protection, the VD1 in a D3 rectifier bridge is a vacuum circuit breaker opening coil electric energy elimination diode, and the VD2 in a D3 rectifier bridge is performed reverse voltage protection diode.
The Q3 driving tube protection is subjected to common mode surge pulse suppression protection by VD3 and VD4 in RV2 and D3 rectifier bridges, differential mode surge pulse suppression protection by VD3 and VD4 in RV1 and D3 rectifier bridges, VD3 in D3 rectifier bridges is a vacuum circuit breaker opening coil electric energy elimination diode, and VD4 in D3 rectifier bridges is an anti-reverse voltage protection diode.
In an embodiment of the present invention, the common mode surge pulse suppression protection of VD1 and VD2 inside RV2 and D3 rectifier bridges is:
a, enabling a surge pulse voltage VSW positive and PE negative RV2 pin 1 to flow to an RV2 pin 2 loop;
b, surge pulse voltage D3 has positive point at pin 2 and negative point PE, current enters pin 2 of D3 and flows out of pin 1 of RV2 to a pin 2 loop of RV2 through VD1 and D3 in a rectifier bridge;
c surge pulse voltage VSW negative, PE positive, RV2 pin 2 flows to RV2 pin 1 loop;
d, surge pulse voltage D3 has negative point of the 2 nd pin and positive PE, current enters the 2 nd and 1 st pins of RV2, flows to the 4 th pin of D3 through the 1 st and 2 nd pins of RV1, and flows out of a loop through VD2 and D3 in a rectifier bridge;
e, the surge pulse voltage GND is positive, the PE is negative, and the current enters a 4 th pin of D3 and flows to a 2 nd pin loop of RV2 through VD2, VD4, VD1, VD3 and D3 which flow out of an RV2 at the 1 st pin in a rectifier bridge;
f surge pulse voltage GND negative, PE positive, current enters RV2 pin 2 and flows out of the loop through RV2 pin 1 to RV1 pin 1 and RV1 pin 2.
3. The drive protection circuit of the vacuum circuit breaker as claimed in claim 1, wherein the differential mode surge pulse suppression protection of VD1 and VD2 inside the RV1 and D3 rectifier bridge is as follows:
a, surge pulse voltage VSW is positive, GND is negative, and surge pulse current enters a 1 st pin of RV1 and flows to a 2 nd pin loop of RV 1;
b, surge pulse voltage VSW negative and GND positive surge pulse current enters a 4 th pin of D3 and flows out of a loop through VD2, VD4, VD1, VD3 and a 1 st pin of D3 in a rectifier bridge;
c surge pulse voltage D3 pin 2 positive, VSW negative: the surge pulse current enters a No. 2 pin of D3 and flows out of a loop through a VD1 pin and a No. 1 pin of D3 in a rectifier bridge;
d, surge pulse voltage D3, a 2 nd pin point is negative, GND is positive, and inrush pulse current enters a 4 th pin of D3 and flows out of a loop through VD2 and a 2 nd pin of D3 in a rectifier bridge;
e surge pulse voltage D3 pin 2 positive, GND negative, inrush pulse current into pin 2 of D3, pin 1 of D3 into pin 1 of RV1 to pin 2 of RV 2.
In an embodiment of the present invention, the common mode surge pulse suppression protection of VD3 and VD4 inside RV2 and D3 rectifier bridges is:
a, enabling a surge pulse voltage VSW positive and PE negative RV2 pin 1 to flow to an RV2 pin 2 loop;
b, surge pulse voltage D3 pin 3 is positive, PE is negative, current enters a pin 3 of D3, flows out of a pin 1 of RV2 through VD3 and a pin 1 of D3 in a rectifier bridge, and flows to a pin 2 loop of RV 2;
c surge pulse voltage VSW negative, PE positive, RV2 pin 2 flows to RV2 pin 1 loop;
d, the surge pulse voltage D3 has a negative 3 rd pin point and a positive PE pin, and the current enters an RV2 2 nd pin and an RV2 1 st pin and flows to a D3 4 th pin through the RV1 1 st pin and the RV1 2 nd pin and flows out of a loop through VD4 and D3 3 rd pins in the rectifier bridge;
e, the surge pulse voltage GND is positive, the PE is negative, the current enters a 4 th pin of D3 and flows to a 2 nd pin loop of RV2 through VD4, VD2, VD1 and VD3 in a rectifier bridge, and a 1 st pin of RV2 flowing out of a D3 is connected to a 2 nd pin loop of the RV 2;
f surge pulse voltage GND negative, PE positive, current enters RV2 pin 2 and flows out of the loop through RV2 pin 1 to RV1 pin 1 and RV1 pin 2.
In an embodiment of the present invention, the differential mode surge pulse suppression protection of VD3 and VD4 inside RV1 and D3 rectifier bridges is:
a, surge pulse voltage VSW is positive, GND is negative, and surge pulse current enters a 1 st pin of RV1 and flows to a 2 nd pin loop of RV 2;
b, the surge pulse voltage VSW is negative, the GND positive surge pulse current enters a No. 4 pin of D3 and flows out of a No. 1 loop through VD4, VD2, VD1, VD3 and D3 in a rectifier bridge;
c surge pulse voltage D3 pin 3 positive, VSW negative: the surge pulse current enters a 3 rd pin of D3 and flows out of a loop through a VD3 pin and a 1 st pin of D3 in a rectifier bridge;
d, the surge pulse voltage D3 has a negative 3 rd pin point, a positive GND pin point and a surge pulse current entering a 4 th pin of the D3 and flowing out of a loop through a VD4 pin and a 3 rd pin of the D3 in a rectifier bridge;
e surge pulse voltage D3 pin 3 positive, GND negative, inrush pulse current into pin 3 of D3, D3 flow 1 into RV1 pin 1 to RV2 pin 2 loop.
In an embodiment of the invention, in the Q1 driving tube protection, when Q1 is turned off, the magnetic 6 pin of the opening coil of the vacuum circuit breaker is positive voltage, the magnetic 4 pin is negative voltage, and current enters the 2 nd pin of D3 and flows out of the loop through the VD1 and the 1 st pin of D3 in the rectifier bridge, so that the elimination of the magneto-electric energy of the opening coil is completed.
In an embodiment of the invention, in the Q1 driving transistor protection, when the Q1 reverse voltage protection is performed when the GND positive voltage Q1 2 nd pin is negative voltage, the current enters the D3 th pin 4 and flows out of the loop through the VD2 and D3 nd pin 2 in the rectifier bridge.
In an embodiment of the invention, in the Q3 driving tube protection, when Q3 is turned off, the 1 st pin of the closing coil of the vacuum circuit breaker is positive voltage, the 2 nd pin is negative voltage, the current enters the 3 rd pin of D3 and flows out of the loop through the VD3 and the 1 st pin of D3 in the rectifier bridge, and the electric energy elimination of the closing coil is completed.
In an embodiment of the present invention, in the Q3 driver protection, the Q3 reverse voltage protection is used; when the GND positive voltage Q3 is the 2 nd pin negative voltage, the current enters the 4 th pin of D3 and flows back through VD4 and the 3 rd pin of D3 in the rectifier bridge.
In conclusion, the invention solves the problem that 1.5VP reverse voltage causes damage and damage to the switch tube when the differential mode surge pulse is positive because the voltage dependent resistor characteristic uses the model selection V1MA which is 1.5VP which is 2.2VAC, and simultaneously reduces the cost, simplifies the production process and increases the reverse voltage protection.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A vacuum circuit breaker drive protection circuit is characterized by comprising a Q1 drive tube protection circuit and a Q3 drive tube protection circuit; the Q1 driving tube protection is performed by RV2, VD1 and VD2 in a D3 rectifier bridge and common-mode surge pulse suppression protection, the RV1 and VD1 and VD2 differential-mode surge pulse suppression protection in the D3 rectifier bridge, the VD1 in the D3 rectifier bridge is a vacuum circuit breaker opening coil electric energy elimination diode, and the VD2 in the D3 rectifier bridge is an anti-reverse voltage protection diode;
the Q3 driving tube protection is subjected to common mode surge pulse suppression protection by VD3 and VD4 in RV2 and D3 rectifier bridges, differential mode surge pulse suppression protection by VD3 and VD4 in RV1 and D3 rectifier bridges, VD3 in D3 rectifier bridges is a vacuum circuit breaker opening coil electric energy elimination diode, and VD4 in D3 rectifier bridges is an anti-reverse voltage protection diode.
2. The vacuum circuit breaker driving protection circuit as claimed in claim 1, wherein the RV2, D3 rectifier bridge internal VD1, VD2 common mode surge pulse suppression protection is:
a, enabling a surge pulse voltage VSW positive and PE negative RV2 pin 1 to flow to an RV2 pin 2 loop;
b, surge pulse voltage D3 has positive point at pin 2 and negative point PE, current enters pin 2 of D3 and flows out of pin 1 of RV2 to a pin 2 loop of RV2 through VD1 and D3 in a rectifier bridge;
c surge pulse voltage VSW negative, PE positive, RV2 pin 2 flows to RV2 pin 1 loop;
d, surge pulse voltage D3 has negative point of the 2 nd pin and positive PE, current enters the 2 nd and 1 st pins of RV2, flows to the 4 th pin of D3 through the 1 st and 2 nd pins of RV1, and flows out of a loop through VD2 and D3 in a rectifier bridge;
e, the surge pulse voltage GND is positive, the PE is negative, and the current enters a 4 th pin of D3 and flows to a 2 nd pin loop of RV2 through VD2, VD4, VD1, VD3 and D3 which flow out of an RV2 at the 1 st pin in a rectifier bridge;
f surge pulse voltage GND negative, PE positive, current enters RV2 pin 2 and flows out of the loop through RV2 pin 1 to RV1 pin 1 and RV1 pin 2.
3. The drive protection circuit of the vacuum circuit breaker as claimed in claim 1, wherein the differential mode surge pulse suppression protection of VD1 and VD2 inside the RV1 and D3 rectifier bridge is as follows:
a, surge pulse voltage VSW is positive, GND is negative, and surge pulse current enters a 1 st pin of RV1 and flows to a 2 nd pin loop of RV 1;
b, surge pulse voltage VSW negative and GND positive surge pulse current enters a 4 th pin of D3 and flows out of a loop through VD2, VD4, VD1, VD3 and a 1 st pin of D3 in a rectifier bridge;
c surge pulse voltage D3 pin 2 positive, VSW negative: the surge pulse current enters a No. 2 pin of D3 and flows out of a loop through a VD1 pin and a No. 1 pin of D3 in a rectifier bridge;
d, surge pulse voltage D3, a 2 nd pin point is negative, GND is positive, and inrush pulse current enters a 4 th pin of D3 and flows out of a loop through VD2 and a 2 nd pin of D3 in a rectifier bridge;
e surge pulse voltage D3 pin 2 positive, GND negative, inrush pulse current into pin 2 of D3, pin 1 of D3 into pin 1 of RV1 to pin 2 of RV 2.
4. The vacuum circuit breaker driving protection circuit as claimed in claim 1, wherein the RV2, D3 rectifier bridge internal VD3, VD4 common mode surge pulse suppression protection is:
a, enabling a surge pulse voltage VSW positive and PE negative RV2 pin 1 to flow to an RV2 pin 2 loop;
b, surge pulse voltage D3 pin 3 is positive, PE is negative, current enters a pin 3 of D3, flows out of a pin 1 of RV2 through VD3 and a pin 1 of D3 in a rectifier bridge, and flows to a pin 2 loop of RV 2;
c surge pulse voltage VSW negative, PE positive, RV2 pin 2 flows to RV2 pin 1 loop;
d, the surge pulse voltage D3 has a negative 3 rd pin point and a positive PE pin, and the current enters an RV2 2 nd pin and an RV2 1 st pin and flows to a D3 4 th pin through the RV1 1 st pin and the RV1 2 nd pin and flows out of a loop through VD4 and D3 3 rd pins in the rectifier bridge;
e, the surge pulse voltage GND is positive, the PE is negative, the current enters a 4 th pin of D3 and flows to a 2 nd pin loop of RV2 through VD4, VD2, VD1 and VD3 in a rectifier bridge, and a 1 st pin of RV2 flowing out of a D3 is connected to a 2 nd pin loop of the RV 2;
f surge pulse voltage GND negative, PE positive, current enters RV2 pin 2 and flows out of the loop through RV2 pin 1 to RV1 pin 1 and RV1 pin 2.
5. The drive protection circuit of the vacuum circuit breaker as claimed in claim 1, wherein the differential mode surge pulse suppression protection of VD3 and VD4 inside the RV1 and D3 rectifier bridge is as follows:
a, surge pulse voltage VSW is positive, GND is negative, and surge pulse current enters a 1 st pin of RV1 and flows to a 2 nd pin loop of RV 2;
b, the surge pulse voltage VSW is negative, the GND positive surge pulse current enters a No. 4 pin of D3 and flows out of a No. 1 loop through VD4, VD2, VD1, VD3 and D3 in a rectifier bridge;
c surge pulse voltage D3 pin 3 positive, VSW negative: the surge pulse current enters a 3 rd pin of D3 and flows out of a loop through a VD3 pin and a 1 st pin of D3 in a rectifier bridge;
d, the surge pulse voltage D3 has a negative 3 rd pin point, a positive GND pin point and a surge pulse current entering a 4 th pin of the D3 and flowing out of a loop through a VD4 pin and a 3 rd pin of the D3 in a rectifier bridge;
e surge pulse voltage D3 pin 3 positive, GND negative, inrush pulse current into pin 3 of D3, D3 flow 1 into RV1 pin 1 to RV2 pin 2 loop.
6. The vacuum circuit breaker driving protection circuit according to claim 1, wherein in the Q1 driving tube protection, when Q1 is turned off, the magnetic 6 pin of the opening coil of the vacuum circuit breaker is positive voltage, the magnetic 4 pin is negative voltage, current enters the 2 nd pin of D3 and flows out of a loop through VD1 and the 1 st pin of D3 in the rectifier bridge, and the magneto-electric energy elimination of the opening coil is completed.
7. The vacuum circuit breaker driving protection circuit of claim 6, wherein in the Q1 driving tube protection, when the Q1 reverse voltage protection is performed on the 2 nd pin of the Q1 with the GND positive voltage, the current enters the 4 th pin of the D3 and flows out of a loop through VD2 and the 2 nd pin of the D3 in the rectifier bridge.
8. The driving protection circuit of the vacuum circuit breaker as claimed in claim 1, wherein in the Q3 driving tube protection, when Q3 is turned off, the 1 st pin of the closing coil of the vacuum circuit breaker is positive voltage, the 2 nd pin is negative voltage, the current enters the 3 rd pin of D3 and flows out of the loop through the VD3 and the 1 st pin of D3 in the rectifier bridge, and the electric energy elimination of the closing coil is completed.
9. The vacuum circuit breaker driving protection circuit as claimed in claim 1, wherein in the Q3 driving tube protection, the Q3 reverse voltage protection circuit; when the GND positive voltage Q3 is the 2 nd pin negative voltage, the current enters the 4 th pin of D3 and flows out of the loop through VD4 and the 3 rd pin of D3 in the rectifier bridge.
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|---|---|
| CN112993943B (en) | 2023-05-26 |
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