A redundant control circuit for a vacuum circuit breaker

Abstract

This application relates to a redundant control circuit for a vacuum circuit breaker. By setting up two control circuits connected to the solenoid valve of the vacuum circuit breaker, and a switching switch including a first contact and a second contact, a fault in the current control circuit can be addressed by switching the first contact of the switching switch to another control circuit. Simultaneously switching the second contact of the switching switch connects the other control circuit to the solenoid valve of the vacuum circuit breaker, ensuring that the solenoid valve can be energized normally, thus enabling the vacuum circuit breaker to close normally. This improves the reliability of the main circuit conduction of the rail vehicle. Furthermore, by synchronously switching the first and second contacts, the input terminals of the control circuit and the solenoid valve can be switched simultaneously, effectively enhancing the reliability of the control circuit.

Description

Technical Field

[0001] This application belongs to the field of rail transit technology, and in particular relates to a redundant control circuit for a vacuum circuit breaker. Background Technology

[0002] Vacuum circuit breakers are the mainstream switching products for power distribution systems, and are widely used in the protection and control units of power distribution equipment in industries such as rail transit, power, mining, and construction.

[0003] Vacuum circuit breakers in rail vehicles typically employ pneumatic-electric holding control. Power is supplied to the solenoid valve and holding coil via a control circuit in a control unit board connected to a 110V power supply. When the solenoid valve is energized, the air path in the vacuum circuit breaker opens, causing the circuit breaker to close. Simultaneously, the power supply powers the holding coil, energizing it and generating electromagnetic force to maintain the closed state. However, if the control circuit controlling the solenoid valve malfunctions, the solenoid valve will not be energized, will not operate, the air path will not open, and the vacuum circuit breaker will fail to close, affecting the reliability of the main circuit of the rail vehicle. Summary of the Invention

[0004] The purpose of this application is to provide a redundant control circuit for a vacuum circuit breaker. The redundant control circuit for a vacuum circuit breaker provided by this application, by setting two control circuits connected to the solenoid valve of the vacuum circuit breaker, and a switching switch, can ensure that the solenoid valve of the vacuum circuit breaker can be energized normally after the current control circuit fails, and thus the vacuum circuit breaker can be closed normally, thereby improving the reliability of the main circuit conduction of the rail vehicle.

[0005] The technical solution provided in this application is as follows:

[0006] A redundant control circuit for a vacuum circuit breaker includes: a first control circuit, a second control circuit, and a switching switch; wherein:

[0007] The switching switch includes a first contact and a second contact;

[0008] The first end of the first contact is connected to the power supply, and is used to select whether the second end is connected to the first control circuit or to the second control circuit.

[0009] The second contact operates synchronously with the first contact, and is used to synchronously select the connection between the first control circuit or the second control circuit and the solenoid valve of the vacuum circuit breaker.

[0010] The first control circuit is used to receive a first signal output by the power supply when the second end of the first contact is connected to the first control circuit, and control the solenoid valve to turn on based on the first signal and turn off after a first duration;

[0011] The second control circuit is used to receive a second signal output by the power supply when the second end of the first contact is connected to the second control circuit, and to control the solenoid valve to turn on and turn off after a second duration based on the second signal.

[0012] Preferably, the vacuum circuit breaker is equipped with a micro switch and a wind pressure switch, and the first control circuit includes a first trigger switch, a first solenoid valve switch, and a first delay circuit, wherein:

[0013] The micro switch is connected in series between the second end of the first contact and the first end of the first trigger switch, and is used to turn on when the first signal is received;

[0014] The air pressure switch is connected in series between the second end of the first contact and the first end of the first trigger switch, and is used to conduct when the first signal is received and the air pressure in the air storage tank of the vacuum circuit breaker reaches the action value.

[0015] The second end of the first trigger switch is connected to the first end of the first solenoid valve switch, and is used to turn on and output the first drive signal when the micro switch and the wind pressure switch are turned on and the first signal is received;

[0016] The first end of the first solenoid valve switch is connected to the first end of the second contact, the second end of the second contact is connected to the solenoid valve of the vacuum circuit breaker, and the second end of the first solenoid valve switch is connected to the second end of the first contact, for being turned on when the first drive signal is received and turned off after the first duration;

[0017] The first terminal of the first delay circuit is connected to the third terminal of the first trigger switch, the second terminal of the first delay circuit is connected to the second terminal of the first solenoid valve switch, and the third terminal of the first delay circuit is connected to the third terminal of the first solenoid valve switch, for being turned on when the first drive signal is received and for keeping the first solenoid valve switch in the on state for the first duration.

[0018] Preferably, the second control circuit includes a second trigger switch, a second solenoid valve switch, and a second delay circuit, wherein:

[0019] The micro switch is connected in series between the second end of the first contact and the first end of the second trigger switch, and is used to turn on when the second signal is received;

[0020] The wind pressure switch is connected in series between the second end of the first contact and the first end of the second trigger switch, and is used to conduct when the second signal is received and the air pressure in the air storage tank of the vacuum circuit breaker reaches the action value.

[0021] The second terminal of the second trigger switch is connected to the first terminal of the second solenoid valve switch, and is used to turn on and output the second drive signal when the micro switch and the wind pressure switch are turned on and the second signal is received;

[0022] The first end of the second solenoid valve switch is connected to the first end of the second contact, the second end of the second contact is connected to the solenoid valve of the vacuum circuit breaker, and the second end of the second solenoid valve switch is connected to the second end of the first contact, for being turned on when the second drive signal is received and turned off after the second duration;

[0023] The first terminal of the second delay circuit is connected to the third terminal of the second trigger switch, the second terminal of the second delay circuit is connected to the second terminal of the second solenoid valve switch, and the third terminal of the second delay circuit is connected to the third terminal of the second solenoid valve switch, for being turned on when the second drive signal is received and for keeping the second solenoid valve switch in the on state for the second duration.

[0024] Preferably, the first control circuit further includes a first holding circuit;

[0025] The first terminal of the first holding circuit is connected to the second terminal of the first contact and the first terminal of the holding coil of the vacuum circuit breaker, respectively.

[0026] The second terminal of the first holding circuit is connected to the second terminal of the first trigger switch and the second terminal of the holding coil of the vacuum circuit breaker, respectively.

[0027] Preferably, the first control circuit further includes a first voltage regulator circuit;

[0028] The first terminal of the first voltage regulator circuit and the second terminal of the first contact;

[0029] The second terminal of the first voltage regulator circuit is connected to the second terminal of the first solenoid valve switch, the second terminal of the micro switch, and the second terminal of the wind pressure switch, respectively.

[0030] The third terminal of the first voltage regulator circuit is connected to the first terminal of the first holding circuit.

[0031] Preferably, the first voltage regulator circuit includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first transformer, and a first resistor, wherein:

[0032] The first terminal of the first capacitor is connected to the second terminal of the first contact, the first terminal of the second capacitor, the first terminal of the third capacitor, and the first terminal of the first transformer, respectively.

[0033] The second terminal of the first capacitor and the first terminal of the sixth capacitor are connected to ground;

[0034] The second terminal of the sixth capacitor is connected to the second terminal of the first contact, the second terminal of the second capacitor, the second terminal of the third capacitor, the second terminal of the first transformer, the second terminal of the first solenoid valve switch, the second terminal of the micro switch, and the second terminal of the wind pressure switch;

[0035] The third terminal of the first transformer is connected to the first terminal of the fourth capacitor, the first terminal of the fifth capacitor, the first terminal of the first resistor, and the first terminal of the first holding circuit.

[0036] The fourth terminal of the first transformer is connected to the second terminal of the fourth capacitor, the second terminal of the fifth capacitor, and the second terminal of the first resistor.

[0037] Preferably, the first delay circuit includes a thyristor, a first diode, a second diode, a third diode, a fourth diode, a seventh capacitor, an eighth capacitor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor, wherein:

[0038] The second terminal of the first solenoid valve switch is connected to the negative terminal of the first diode, the first terminal of the seventh capacitor, the first terminal of the fourth resistor, the anode of the thyristor, the first terminal of the second resistor, and the first terminal of the third resistor, respectively.

[0039] The third terminal of the first solenoid valve switch is connected to the first terminal of the fifth resistor;

[0040] The second terminal of the fifth resistor is connected to the positive terminal of the fourth diode;

[0041] The negative terminal of the fourth diode is connected to the positive terminal of the first diode, the second terminal of the seventh capacitor, the second terminal of the fourth resistor, the cathode of the thyristor, the third terminal of the first trigger switch, and the negative terminal of the eighth capacitor, respectively.

[0042] The positive terminal of the second diode is connected to the control terminal of the thyristor;

[0043] The positive terminal of the eighth capacitor is connected to the negative terminal of the second diode, the positive terminal of the third diode, and the second terminal of the second resistor, respectively.

[0044] Preferably, the first control circuit further includes a fifth diode;

[0045] The positive terminal of the fifth diode is connected to the second terminal of the sixth capacitor;

[0046] The negative terminal of the fifth diode is connected to the second terminal of the first solenoid valve switch.

[0047] Preferably, the first holding circuit includes a sixth diode and a seventh diode;

[0048] The positive terminal of the sixth diode is connected to the first terminal of the first resistor and the first terminal of the holding coil of the vacuum circuit breaker, respectively.

[0049] The negative terminal of the sixth diode is connected to the negative terminal of the seventh diode;

[0050] The positive terminal of the seventh diode is connected to the second terminal of the first trigger switch and the second terminal of the holding coil of the vacuum circuit breaker, respectively.

[0051] This application also provides a rail vehicle including a redundant control circuit for the vacuum circuit breaker described in any of the above claims.

[0052] Compared with the prior art, this application provides a redundant control circuit for a vacuum circuit breaker, comprising: a first control circuit, a second control circuit, and a switching switch; wherein: the switching switch includes a first contact and a second contact, the first end of the first contact is connected to a power supply, and the first contact is used to select whether the second end is connected to the first control circuit or the second control circuit; the second contact operates synchronously with the first contact, and is used to synchronously select whether the first control circuit or the second control circuit is connected to the solenoid valve of the vacuum circuit breaker; the first control circuit is used to receive a first signal output by the power supply when the second end of the first contact is connected to the first control circuit, and control the solenoid valve to turn on based on the first signal and turn off after a first duration; the second control circuit is used to receive power supply when the second end of the first contact is connected to the second control circuit. The second signal output by the power supply controls the solenoid valve to turn on and turn off after a second duration. This application sets up two control circuits connected to the solenoid valve of the vacuum circuit breaker, and a switching switch including a first contact and a second contact. After a failure of the current control circuit, the first contact of the switching switch is switched to another control circuit. By synchronously switching the second contact of the switching switch, the other control circuit is connected to the solenoid valve of the vacuum circuit breaker. This ensures that the solenoid valve of the vacuum circuit breaker can be energized normally, and thus the vacuum circuit breaker can be closed normally. This improves the reliability of the main circuit of the rail vehicle. By synchronously switching the first contact and the second contact, the input terminal of the control circuit and the solenoid valve can be switched synchronously at the same time, which can effectively improve the reliability of the control circuit. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a structural block diagram of a redundant control circuit for a vacuum circuit breaker disclosed in an embodiment of this application;

[0055] Figure 2 This is a schematic diagram of a redundant control circuit for a vacuum circuit breaker disclosed in an embodiment of this application;

[0056] Figure 3 This is a structural block diagram showing the connection between the switching switch and the first control circuit disclosed in an embodiment of this application;

[0057] Figure 4 This is a structural block diagram of the connection between the switching switch and the second control circuit disclosed in the embodiments of this application;

[0058] Figure 5 This is a circuit diagram showing the connection between the switching switch and the first control circuit disclosed in an embodiment of this application. Detailed Implementation

[0059] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0061] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0063] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0064] Please Figure 1 As shown, this application embodiment provides a redundant control circuit for a vacuum circuit breaker, including: a first control circuit 10, a second control circuit 20, and a switching switch; the switching switch includes a first contact 301 and a second contact 302, wherein: the first end of the first contact 301 is connected to a power supply 40, and is used to select whether the second end is connected to the first control circuit 10 or the second control circuit 20; the second contact 302 operates synchronously with the first contact 301, and is used to synchronously select whether the first control circuit 10 or the second control circuit 20 is connected to the solenoid valve 50 of the vacuum circuit breaker; the first control circuit 10 is used to receive a first signal output by the power supply 40 when the second end of the first contact 301 is connected to the first control circuit 10, and control the solenoid valve 50 to conduct based on the first signal and to turn off after a first duration; the second control circuit 20 is used to receive a second signal output by the power supply 40 when the second end of the first contact 301 is connected to the second control circuit 20, and control the solenoid valve 50 to conduct based on the second signal and to turn off after a second duration.

[0065] In this embodiment, the switching of the first contact 301 can be achieved by the driver manually switching the first contact 301 to another control circuit if the current control circuit cannot properly control the closing of the vacuum circuit breaker during the pantograph operation. The vacuum circuit breaker in this embodiment is not shown in the accompanying drawings.

[0066] like Figure 2As shown, the redundant control circuit also includes a terminal block 90. ​​The power supply 40 is connected to terminal 2 of the terminal block 90, the solenoid valve 50 is connected to terminal 9 of the terminal block 90, and the holding coil 80 is connected to terminal 15 of the terminal block 90. ​​When the first contact 301 of the switch is not pressed (i.e., pins 2 and 3 are connected), the first signal output by the power supply 40 is input from terminal 2 of the terminal block 90 to point 6 of the first control circuit 10 (i.e., the main control circuit). The first signal is output from point 29 of the circuit board of the first control circuit 10 to the second contact 302 of the switch (pins 2 and 3 are connected). After voltage division by the tenth resistor R10, it is output to the solenoid valve 50 through terminal 9 of the terminal block 90. ​​Simultaneously, the first signal output from point 24 of the circuit board of the first control circuit 10 is connected in parallel with the second control circuit 20 (i.e., the backup control circuit), and after voltage division by the eleventh resistor R11, it is output from point 15 of the terminal block 90. The output is sent to the resistor box and holding coil 80. When the first contact 301 of the switch is pressed (i.e., pins 1 and 3 are connected), the second signal output by the power supply 40 is input from the terminal 2 of the terminal block 90 to the 6th position of the second control circuit 20 (i.e., the backup control circuit). The second signal is output from the 29th position of the circuit board of the second control circuit 20 to the second contact 302 of the switch (pins 1 and 3 are connected). After being divided by the tenth resistor R10, it is output to the solenoid valve 50 through the terminal 90. At the same time, the second signal is output from the 24th position of the circuit board of the second control circuit 20 and connected in parallel with the first control circuit 10 (i.e., the main control circuit). After being divided by the eleventh resistor R11, it is output from the 15th position of the terminal block 90 to the resistor box and holding coil 80. By synchronously switching the first contact and the second contact, the input terminal of the control circuit and the solenoid valve can be switched synchronously at the same time, which can effectively improve the reliability of the control circuit.

[0067] In this embodiment, one end of the tenth resistor R10 is also connected to a counter, which is used to count the number of times the solenoid valve is opened. The switching switch may also include a third contact between the 24 points on the circuit boards of the first control circuit 10 and the second control circuit 20 and the eleventh resistor R11. The third contact is used to synchronously switch the holding coil 80 when the input terminal of the control circuit and the solenoid valve are synchronously switched, which can further improve the reliability of the control circuit.

[0068] Compared with the prior art, this application provides a redundant control circuit for a vacuum circuit breaker, including: a first control circuit 10, a second control circuit 20, and a first contact 301; wherein: a first end of the first contact 301 is connected to a power supply 40, used to select whether the second end is connected to the first control circuit 10 or the second control circuit 20; the first control circuit 10 is connected to the solenoid valve 50 of the vacuum circuit breaker, used to receive a first signal output by the power supply 40 when the second end of the first contact 301 is connected to the first control circuit 10, and control the solenoid valve 50 to conduct based on the first signal and to cut off after a first duration; the second control circuit 20 and... The solenoid valve 50 of the vacuum circuit breaker is connected to receive a second signal output by the power supply 40 when the second end of the first contact 301 is connected to the second control circuit 20. Based on the second signal, the solenoid valve 50 is controlled to turn on and turn off after a second duration. By setting two control circuits connected to the solenoid valve 50 of the vacuum circuit breaker and the first contact 301, this application can ensure that the solenoid valve 50 of the vacuum circuit breaker can be energized normally after the current control circuit fails, by switching the first contact 301 to another control circuit, thereby enabling the vacuum circuit breaker to close normally and improving the reliability of the main circuit of the rail vehicle.

[0069] like Figure 3 and Figure 5 As shown, in one embodiment of this application, the vacuum circuit breaker is equipped with a micro switch 60 and a pressure switch 70. The first control circuit 10 includes a first trigger switch 11, a first solenoid valve switch 12, and a first delay circuit 13. Specifically: the micro switch 60 is connected in series between the second end of the first contact 301 and the first end of the first trigger switch 11, and is used to conduct when a first signal is received; the pressure switch 70 is connected in series between the second end of the first contact 301 and the first end of the first trigger switch 11, and is used to conduct when the first signal is received and the air pressure in the air reservoir of the vacuum circuit breaker reaches the operating value; the second end of the first trigger switch 11 is connected to the first end of the first solenoid valve switch 12, and is used to conduct when the micro switch 60 and the pressure switch 70 are both on and connected. Upon receiving the first signal, the circuit is turned on and outputs the first drive signal; the first terminal of the first solenoid valve switch 12 is connected to the first terminal of the second contact 302, the second terminal of the second contact 302 is connected to the solenoid valve 50 of the vacuum circuit breaker, and the second terminal of the first solenoid valve switch 12 is connected to the second terminal of the first contact 301, for turning on upon receiving the first drive signal and turning off after a first duration; the first terminal of the first delay circuit 13 is connected to the third terminal of the first trigger switch 11, the second terminal of the first delay circuit 13 is connected to the second terminal of the first solenoid valve switch 12, and the third terminal of the first delay circuit 13 is connected to the third terminal of the first solenoid valve switch 12, for turning on upon receiving the first drive signal and keeping the first solenoid valve switch 12 in the on state for the first duration.

[0070] In this embodiment, when the air pressure in the air storage tank of the vacuum circuit breaker reaches the action value, when the second end of the first contact 301 is connected to the first control circuit 10, the power supply 40 outputs a first signal. Upon receiving the first signal, the micro switch 60 and the air pressure switch 70 close. The first trigger switch 11 conducts and outputs a first drive signal when the micro switch 60 and the air pressure switch 70 are on and the first signal is received. The first solenoid valve switch 12 conducts when the first drive signal is received, so that the solenoid valve 50 of the vacuum circuit breaker is energized, the air path in the vacuum circuit breaker is opened, and the vacuum circuit breaker is pushed to close. At the same time, the power supply 40 supplies power to the holding coil 80, so that the holding coil 80 is energized and generates electromagnetic force to maintain the closed state. The first delay circuit 13 conducts when the first drive signal is received and keeps the first solenoid valve switch 12 in the conducting state for a first duration (e.g., 600ms to 900ms). After the first duration, the first solenoid valve switch 12 is turned off, so that the solenoid valve 50 is de-energized.

[0071] In this embodiment, the first trigger switch 11 can be an NPN transistor, and the first solenoid valve switch 12 can be a PMOS field-effect transistor with a withstand voltage of -500V.

[0072] In this embodiment, a time delay circuit is used to replace the time relay, which has a very high failure rate, resulting in higher stability of the control circuit. In this embodiment, the micro switch 60 is an auxiliary contact in the vacuum circuit breaker, and the air pressure switch 70 can be a device capable of detecting and outputting signals regarding the gas pressure in the air reservoir of the vacuum circuit breaker.

[0073] like Figure 4As shown, in one embodiment of this application, the second control circuit 20 includes a second trigger switch 21, a second solenoid valve switch 22, and a second delay circuit 23, wherein: a micro switch 60 is connected in series between the second end of the first contact 301 and the first end of the second trigger switch 21, for conducting when a second signal is received; a wind pressure switch 70 is connected in series between the second end of the first contact 301 and the first end of the second trigger switch 21, for conducting when the second signal is received and the air pressure in the air storage cylinder of the vacuum circuit breaker reaches the action value; the second end of the second trigger switch 21 is connected to the first end of the second solenoid valve switch 22, for conducting and outputting when the micro switch 60 and the wind pressure switch 70 are conducting and the second signal is received. A second drive signal is output; the first end of the second solenoid valve switch 22 is connected to the first end of the second contact 302, the second end of the second contact 302 is connected to the solenoid valve 50 of the vacuum circuit breaker, and the second end of the second solenoid valve switch 22 is connected to the second end of the first contact 301, for conducting when the second drive signal is received and turning off after a second duration; the first end of the second delay circuit 23 is connected to the third end of the second trigger switch 21, the second end of the second delay circuit 23 is connected to the second end of the second solenoid valve switch 22, and the third end of the second delay circuit 23 is connected to the third end of the second solenoid valve switch 22, for conducting when the second drive signal is received and keeping the second solenoid valve switch 22 in the conducting state for a second duration.

[0074] In this embodiment, the control principles of the second control circuit 20 and the first control circuit 10 are the same, and will not be described again here.

[0075] In this embodiment, the second trigger switch 21 can be an NPN transistor, and the second solenoid valve switch 22 can be a PMOS field-effect transistor.

[0076] like Figure 5 As shown, in one embodiment of this application, the first control circuit 10 further includes a first holding circuit 14; the first end of the first holding circuit 14 is connected to the second end of the first contact 301 and the first end of the holding coil 80 of the vacuum circuit breaker respectively; the second end of the first holding circuit 14 is connected to the second end of the first trigger switch 11 and the second end of the holding coil 80 of the vacuum circuit breaker respectively.

[0077] In this embodiment, the first control circuit 10 supplies power to the holding coil 80 of the vacuum circuit breaker through the first holding circuit 14.

[0078] like Figure 5As shown, in one embodiment of this application, the first control circuit 10 further includes a first voltage regulator circuit 15; the first end of the first voltage regulator circuit 15 is connected to the second end of the first contact 301; the second end of the first voltage regulator circuit 15 is connected to the second end of the first solenoid valve switch 12, the second end of the micro switch 60, and the second end of the wind pressure switch 70, respectively; the third end of the first voltage regulator circuit 15 is connected to the first end of the first holding circuit 14.

[0079] In this embodiment, by setting a voltage regulator circuit at the second end of the first contact 301 in the first control circuit 10, a stable power supply can be provided to other circuits in the first control circuit 10 except for the voltage regulator circuit.

[0080] like Figure 5 As shown, in one embodiment of this application, the first voltage regulator circuit 15 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first transformer T1, and a first resistor R1, wherein: the first terminal of the first capacitor C1 is connected to the second terminal of the first contact 301, the first terminal of the second capacitor C2, the first terminal of the third capacitor C3, and the first terminal of the first transformer T1; the second terminal of the first capacitor C1 and the first terminal of the sixth capacitor C6 are connected and grounded; the second terminal of the sixth capacitor C6 is connected to the second terminal of the first contact 301, the second terminal of the second capacitor C2, the second terminal of the third capacitor C3, the second terminal of the first transformer T1, the second terminal of the first solenoid valve switch 12, the second terminal of the micro switch 60, and the second terminal of the wind pressure switch 70; the third terminal of the first transformer T1 is connected to the first terminal of the fourth capacitor C4, the first terminal of the fifth capacitor C5, the first terminal of the first resistor R1, and the first terminal of the first holding circuit 14; the fourth terminal of the first transformer T1 is connected to the second terminal of the fourth capacitor C4, the second terminal of the fifth capacitor C5, and the second terminal of the first resistor R1.

[0081] In this embodiment, the first resistor R1 is a varistor, which can withstand greater external voltage or current surges and can provide overvoltage and overcurrent protection.

[0082] like Figure 5As shown, in one embodiment of this application, the first delay circuit 13 includes a thyristor Q1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a seventh capacitor C7, an eighth capacitor C8, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5, wherein: the second terminal of the first solenoid valve switch 12 is connected to the negative terminal of the first diode D1, the first terminal of the seventh capacitor C7, the first terminal of the fourth resistor R4, the anode of the thyristor Q1, the first terminal of the second resistor R2, and the first terminal of the third resistor R3, respectively; the first... The third terminal of the solenoid switch 12 is connected to the first terminal of the fifth resistor R5; the second terminal of the fifth resistor R5 is connected to the anode of the fourth diode D4; the cathode of the fourth diode D4 is connected to the anode of the first diode D1, the second terminal of the seventh capacitor C7, the second terminal of the fourth resistor R4, the cathode of the thyristor Q1, the third terminal of the first trigger switch 11, and the cathode of the eighth capacitor C8; the anode of the second diode D2 is connected to the control electrode of the thyristor Q1; the anode of the eighth capacitor C8 is connected to the cathode of the second diode D2, the anode of the third diode D3, and the second terminal of the second resistor R2.

[0083] In this embodiment, the power supply 40 is 110V. The first terminal of the first solenoid valve switch 12 is the source of the PMOS transistor, the second terminal of the first solenoid valve switch 12 is the drain of the PMOS transistor, and the third terminal of the first solenoid valve switch 12 is the gate of the PMOS transistor. When the air pressure in the air storage cylinder of the vacuum circuit breaker reaches the action value, when the second terminal of the first contact 301 is connected to the first control circuit 10, the power supply 40 outputs a first signal. After receiving the first signal, the micro switch 60 and the air pressure switch 70 close. The first trigger switch 11 conducts and outputs a first drive signal when the micro switch 60 and the air pressure switch 70 are on and the first signal is received. When the PMOS transistor receives the first drive signal, the circuit between the gate and source of the PMOS transistor is completed, and the first diode D1 (i.e., the first...)... The voltage across the Zener diode is 15V. Since the VGS voltage of the PMOS transistor is the same as the 15V voltage across the first Zener diode, and the 15V VGS voltage is greater than the conduction threshold of the MOS transistor, the circuit between the drain and source of the PMOS transistor is completed. This energizes the solenoid valve 50 of the vacuum circuit breaker connected to the source of the PMOS transistor. At the same time, the eighth capacitor C8 is charged, and the voltage across the eighth capacitor C8 continuously rises. After the eighth capacitor C8 has been charging for 575ms to 650ms, the voltage across the eighth capacitor C8 is enough to turn on the second diode D2 (i.e., the second Zener diode). Then the thyristor Q1 is turned on. The eighth capacitor C8 discharges rapidly due to the conduction of the thyristor Q1, causing the VGS voltage of the MOS transistor to fall below the conduction threshold of the MOS transistor, thus turning off the MOS transistor and de-energizing the solenoid valve 50, stopping its operation.

[0084] In this embodiment, the fourth diode D4 can be a Zener diode, and a bidirectional transient diode TVS1 can be connected in series between the drain and source of the PMOS transistor to provide overvoltage or overcurrent protection for the PMOS transistor.

[0085] like Figure 5 As shown, in one embodiment of this application, the first control circuit 10 further includes a fifth diode D5; the positive terminal of the fifth diode D5 is connected to the second terminal of the sixth capacitor C6; and the negative terminal of the fifth diode is connected to the second terminal of the first solenoid valve switch 12.

[0086] In this embodiment, the fifth diode D5 is used for rectification. The diode used can rectify an average current of 3A. The maximum current in the first control current is 1.7V, which can ensure the stable and reliable operation of the solenoid valve 50.

[0087] In this embodiment, a ninth capacitor C9 is also provided between the base and emitter of the first trigger switch 11 (i.e., NPN transistor). The ninth capacitor C9 is a decoupling capacitor, which can effectively suppress the noise voltage generated when the transistor is turned on and off, and can enhance the anti-interference capability of the circuit.

[0088] like Figure 5 As shown, in one embodiment of this application, the first holding circuit 14 includes a sixth diode D6 and a seventh diode D7; the positive terminal of the sixth diode D6 is connected to the first terminal of the first resistor R1 and the first terminal of the holding coil 80 of the vacuum circuit breaker, respectively; the negative terminal of the sixth diode D6 is connected to the negative terminal of the seventh diode D7; the positive terminal of the seventh diode D7 is connected to the second terminal of the first trigger switch 11 and the second terminal of the holding coil 80 of the vacuum circuit breaker, respectively.

[0089] In this embodiment, the sixth diode D6 can be a Zener diode to stabilize the voltage output to the holding coil 80. In this embodiment, to protect the holding coil, an eleventh resistor R11 can be provided between the positive terminal of the sixth diode D6 and the first terminal of the holding coil 80.

[0090] This application also provides a rail vehicle including a redundant control circuit for the vacuum circuit breaker of any of the above claims.

[0091] It should be understood that the use of terms such as "system," "device," "unit," and / or "module" in this application is merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0092] The embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0093] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A redundant control circuit for a vacuum circuit breaker, characterized in that, include: The system comprises a first control circuit, a second control circuit, and a switching switch; wherein: The switching switch includes a first contact and a second contact; The first end of the first contact is connected to the power supply, and is used to select whether the second end is connected to the first control circuit or to the second control circuit. The second contact operates synchronously with the first contact, and is used to synchronously select the connection between the first control circuit or the second control circuit and the solenoid valve of the vacuum circuit breaker. The first control circuit is used to receive a first signal output by the power supply when the second end of the first contact is connected to the first control circuit, and control the solenoid valve to turn on based on the first signal and turn off after a first duration; The second control circuit is used to receive a second signal output by the power supply when the second end of the first contact is connected to the second control circuit, and control the solenoid valve to turn on based on the second signal and turn off after a second duration; The vacuum circuit breaker is equipped with a micro switch and a wind pressure switch. The first control circuit includes a first trigger switch, a first solenoid valve switch, and a first delay circuit, wherein: The micro switch is connected in series between the second end of the first contact and the first end of the first trigger switch, and is used to turn on when the first signal is received; The air pressure switch is connected in series between the second end of the first contact and the first end of the first trigger switch, and is used to conduct when the first signal is received and the air pressure in the air storage tank of the vacuum circuit breaker reaches the action value. The second end of the first trigger switch is connected to the first end of the first solenoid valve switch, and is used to turn on and output the first drive signal when the micro switch and the wind pressure switch are turned on and the first signal is received; The first end of the first solenoid valve switch is connected to the first end of the second contact, the second end of the second contact is connected to the solenoid valve of the vacuum circuit breaker, and the second end of the first solenoid valve switch is connected to the second end of the first contact, for being turned on when the first drive signal is received and turned off after the first duration; The first end of the first delay circuit is connected to the third end of the first trigger switch, the second end of the first delay circuit is connected to the second end of the first solenoid valve switch, and the third end of the first delay circuit is connected to the third end of the first solenoid valve switch, for being turned on when the first drive signal is received and for keeping the first solenoid valve switch in the on state for the first duration. The first control circuit also includes a first holding circuit; The first terminal of the first holding circuit is connected to the second terminal of the first contact and the first terminal of the holding coil of the vacuum circuit breaker, respectively. The second terminal of the first holding circuit is connected to the second terminal of the first trigger switch and the second terminal of the holding coil of the vacuum circuit breaker, respectively.

2. The redundant control circuit of the vacuum circuit breaker according to claim 1, characterized in that, The second control circuit includes a second trigger switch, a second solenoid valve switch, and a second delay circuit, wherein: The micro switch is connected in series between the second end of the first contact and the first end of the second trigger switch, and is used to turn on when the second signal is received; The wind pressure switch is connected in series between the second end of the first contact and the first end of the second trigger switch, and is used to conduct when the second signal is received and the air pressure in the air storage tank of the vacuum circuit breaker reaches the action value. The second terminal of the second trigger switch is connected to the first terminal of the second solenoid valve switch, and is used to turn on and output the second drive signal when the micro switch and the wind pressure switch are turned on and the second signal is received; The first end of the second solenoid valve switch is connected to the first end of the second contact, the second end of the second contact is connected to the solenoid valve of the vacuum circuit breaker, and the second end of the second solenoid valve switch is connected to the second end of the first contact, for being turned on when the second drive signal is received and turned off after the second duration; The first terminal of the second delay circuit is connected to the third terminal of the second trigger switch, the second terminal of the second delay circuit is connected to the second terminal of the second solenoid valve switch, and the third terminal of the second delay circuit is connected to the third terminal of the second solenoid valve switch, for being turned on when the second drive signal is received and for keeping the second solenoid valve switch in the on state for the second duration.

3. The redundant control circuit of the vacuum circuit breaker according to claim 1, characterized in that, The first control circuit also includes a first voltage regulator circuit; The first terminal of the first voltage regulator circuit and the second terminal of the first contact; The second terminal of the first voltage regulator circuit is connected to the second terminal of the first solenoid valve switch, the second terminal of the micro switch, and the second terminal of the wind pressure switch, respectively. The third terminal of the first voltage regulator circuit is connected to the first terminal of the first holding circuit.

4. The redundant control circuit of the vacuum circuit breaker according to claim 3, characterized in that, The first voltage regulator circuit includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first transformer, and a first resistor, wherein: The first terminal of the first capacitor is connected to the second terminal of the first contact, the first terminal of the second capacitor, the first terminal of the third capacitor, and the first terminal of the first transformer, respectively. The second terminal of the first capacitor and the first terminal of the sixth capacitor are connected to ground; The second terminal of the sixth capacitor is connected to the second terminal of the first contact, the second terminal of the second capacitor, the second terminal of the third capacitor, the second terminal of the first transformer, the second terminal of the first solenoid valve switch, the second terminal of the micro switch, and the second terminal of the wind pressure switch; The third terminal of the first transformer is connected to the first terminal of the fourth capacitor, the first terminal of the fifth capacitor, the first terminal of the first resistor, and the first terminal of the first holding circuit. The fourth terminal of the first transformer is connected to the second terminal of the fourth capacitor, the second terminal of the fifth capacitor, and the second terminal of the first resistor.

5. The redundant control circuit of the vacuum circuit breaker according to claim 1, characterized in that, The first delay circuit includes a thyristor, a first diode, a second diode, a third diode, a fourth diode, a seventh capacitor, an eighth capacitor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor, wherein: The second terminal of the first solenoid valve switch is connected to the negative terminal of the first diode, the first terminal of the seventh capacitor, the first terminal of the fourth resistor, the anode of the thyristor, the first terminal of the second resistor, and the first terminal of the third resistor, respectively. The third terminal of the first solenoid valve switch is connected to the first terminal of the fifth resistor; The second terminal of the fifth resistor is connected to the positive terminal of the fourth diode; The negative terminal of the fourth diode is connected to the positive terminal of the first diode, the second terminal of the seventh capacitor, the second terminal of the fourth resistor, the cathode of the thyristor, the third terminal of the first trigger switch, and the negative terminal of the eighth capacitor, respectively. The positive terminal of the second diode is connected to the control terminal of the thyristor; The positive terminal of the eighth capacitor is connected to the negative terminal of the second diode, the positive terminal of the third diode, and the second terminal of the second resistor, respectively.

6. The redundant control circuit of the vacuum circuit breaker according to claim 4, characterized in that, The first control circuit also includes a fifth diode; The positive terminal of the fifth diode is connected to the second terminal of the sixth capacitor; The negative terminal of the fifth diode is connected to the second terminal of the first solenoid valve switch.

7. The redundant control circuit of the vacuum circuit breaker according to claim 4, characterized in that, The first holding circuit includes a sixth diode and a seventh diode; The positive terminal of the sixth diode is connected to the first terminal of the first resistor and the first terminal of the holding coil of the vacuum circuit breaker, respectively. The negative terminal of the sixth diode is connected to the negative terminal of the seventh diode; The positive terminal of the seventh diode is connected to the second terminal of the first trigger switch and the second terminal of the holding coil of the vacuum circuit breaker, respectively.

8. A rail vehicle, characterized in that, Includes the redundant control circuit of the vacuum circuit breaker as described in any one of claims 1-7.

Images