CN210039994U - Control circuit of vacuum circuit breaker - Google Patents
Control circuit of vacuum circuit breaker Download PDFInfo
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- CN210039994U CN210039994U CN201921005021.7U CN201921005021U CN210039994U CN 210039994 U CN210039994 U CN 210039994U CN 201921005021 U CN201921005021 U CN 201921005021U CN 210039994 U CN210039994 U CN 210039994U
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Abstract
The application relates to a vacuum circuit breaker control circuit, include: a first oscillator for outputting a clock signal; the first switch module is connected in series in a first loop of which a power supply supplies power to an electromagnetic valve of the vacuum circuit breaker; the first controller is used for receiving the clock signal, outputting a first signal and outputting a second signal after the first switch module is conducted for a first time; the first signal is used for driving the first switch module to be switched on, and the second signal is used for driving the first switch module to be switched off. By adopting the first oscillator and the first controller with long service life, the electronic time relay in the traditional technology is replaced, and the working reliability of the vacuum circuit breaker in long-term operation is improved.
Description
Technical Field
The utility model relates to a circuit breaker control technology field especially relates to a vacuum circuit breaker control circuit.
Background
The statements herein merely provide background information related to the present application and may not necessarily constitute prior art.
The main tripping fault occurs during the operation of the locomotive, and the investigation condition of a railway company shows that the fault is mainly caused by the fault of a 110V control unit of an electronic time relay, and the fault of the 110V control unit can cause the fault of abnormal tripping of a vacuum circuit breaker, the fault that the vacuum circuit breaker cannot normally close and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a vacuum circuit breaker control circuit for solving the problem of abnormal operation of the vacuum circuit breaker due to a failure of the 110V control unit.
In view of this, it is necessary to provide a vacuum circuit breaker control circuit for solving the problem of abnormal operation of the vacuum circuit breaker due to a failure of the 110V control unit.
An embodiment of the utility model provides a vacuum circuit breaker control circuit, include:
a first oscillator for outputting a clock signal;
the first switch module is connected in series in a first loop of which a power supply supplies power to an electromagnetic valve of the vacuum circuit breaker;
the first controller is used for receiving the clock signal, outputting a first signal and outputting a second signal after the first switch module is conducted for a first time;
the first signal is used for driving the first switch module to be switched on, and the second signal is used for driving the first switch module to be switched off.
The control circuit of the vacuum circuit breaker provided by the embodiment of the application replaces an electronic time relay in the traditional technology by adopting the first oscillator and the first controller, when the circuit is switched on, the first controller works under the action of a clock signal input by the first oscillator and outputs a first signal to drive the first switch module to be switched on, after the first switch module is switched on, a power supply supplies power to an electromagnetic valve through the first switch module, the electromagnetic valve is powered on, an air path in the vacuum circuit breaker is opened, compressed air flows into a pressure cylinder through the electromagnetic valve from an air storage cylinder, a piston is dragged to move upwards, a spring is compressed in the upward movement process of the piston to drive an active contact of the vacuum circuit breaker to be switched on, when the electromagnetic valve is powered on, the power supply supplies power to a holding coil, the piston is kept still under the magnetic force action of the holding coil, after the first time, the first controller outputs a second signal to drive the first switch module, when the electromagnetic valve is de-energized, the coil is kept to continue working under the power supply, and the main contact of the vacuum circuit breaker is kept conducted. Because the oscillator and the controller have long service life and are sensitive to vibration, the reliability of the vacuum circuit breaker can be improved.
In one embodiment, the vacuum interrupter control circuit further comprises:
the air pressure switch is connected between the power supply and the first switch module in series and used for conducting when the air pressure in the air storage cylinder of the vacuum circuit breaker reaches an action value;
the first switch module is used for being conducted when the air pressure switch is conducted and receives the first signal.
In one embodiment, the vacuum interrupter control circuit further comprises:
the standby control circuit is connected in series in a second loop of which the power supply supplies power to the electromagnetic valve;
and the change-over switch is used for selecting the first loop or the second loop.
In one embodiment, the standby control circuit includes:
a second oscillator for outputting a clock signal;
the second switch module is connected in series in the second loop;
the second controller is used for receiving the clock signal, outputting the first signal and outputting a second signal after the second switch module is conducted for the first time;
the power supply and the first switch module are connected in series and then connected with a first input end of the change-over switch, the power supply and the second switch module are connected in series and then connected with a second input end of the change-over switch, an output end of the change-over switch is used for being connected with the electromagnetic valve, and an output end of the change-over switch is connected with the first input end or the second input end.
In one embodiment, the first switch module comprises:
the first electronic switch is used for being conducted and outputting a first driving signal when receiving a first signal output by the first controller;
the second electronic switch is connected with the air pressure switch, is used for being switched on and outputting a second driving signal when the air pressure switch is switched on and receives the first driving signal, and is used for being switched off when the first electronic switch outputs the second signal;
and the third electronic switch is connected in series in the first loop of the power supply for supplying power to the electromagnetic valve and is used for conducting when receiving the second driving signal.
In one embodiment, the second switch module comprises:
the fourth electronic switch is used for being conducted and outputting a third driving signal when receiving the first signal output by the second controller;
the fifth electronic switch is connected with the air pressure switch, is used for being switched on and outputting a fourth driving signal when the air pressure switch is switched on and receives the third driving signal, and is used for being switched off when the fourth electronic switch outputs the second signal;
and the sixth electronic switch is connected in series in a second loop of the power supply for supplying power to the electromagnetic valve and is used for conducting when receiving the fourth driving signal.
In one embodiment, the vacuum interrupter control circuit further comprises:
and the voltage reduction circuit is used for converting the voltage of the power supply into working voltages of the first oscillator and the first controller and providing the working voltages for the first oscillator and the first controller.
In one embodiment, the vacuum interrupter control circuit further comprises:
and the counter is connected with the electromagnetic valve in parallel and is used for recording the power-on times of the electromagnetic valve.
In one embodiment, the vacuum interrupter control circuit further comprises:
the first resistor is connected between a power supply and a holding coil of the vacuum circuit breaker in series;
and the second resistor is connected between the first switch module and the electromagnetic valve in series.
In one embodiment, the vacuum interrupter control circuit further comprises:
and the third resistor is connected between the first switch module and the counter in series.
Drawings
FIG. 1 is a schematic diagram of a control circuit of a vacuum interrupter according to one embodiment;
FIG. 2 is a schematic diagram of a control circuit of a vacuum interrupter according to another embodiment;
fig. 3 is a schematic structural diagram of a control circuit of a vacuum circuit breaker according to still another embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In an exemplary technology, the main circuit breaker control of locomotive operation is realized, and a 110V control unit is mainly adopted to control the on-off of a solenoid valve. Specifically, when the main circuit breaker is switched to a switch-on position, the holding coil is powered on, meanwhile, an electronic time relay in the 110V control unit is switched on, the electromagnetic valve is powered on, an air circuit in the vacuum circuit breaker is opened, compressed air flows into the pressure air cylinder from the air storage cylinder through the electromagnetic valve, the piston is pushed to move upwards, the spring is compressed in the upward movement process of the piston, the main contact is driven to be switched on, the electronic time relay is kept still by the piston under the action of the magnetic force of the holding coil and is switched off after a certain time (for example, 0.6 second), the electromagnetic valve is powered off, the air circuit is switched off, the piston is kept still under the action of the holding coil, and the main contact is.
Utility model people are implementing the in-process, discover that electronic time relay is the highest component of frequency of damage among the 110V the control unit, and electronic time relay opens a way the trouble, can lead to vacuum circuit breaker can not close a floodgate, and electronic time relay switches on or frequently switches on the trouble for a long time, can lead to vacuum circuit breaker can not the separating brake. The electromagnetic valve in the vacuum circuit breaker can be electrified for a long time, so that the electromagnetic valve is burnt out, and finally the vacuum circuit breaker can not be switched on.
In order to solve the above problem, an embodiment of the present invention provides a vacuum circuit breaker control circuit, as shown in fig. 1, including: a first oscillator 10, the first oscillator 10 being configured to output a clock signal; the first switch module 20, the first switch module 20 connects in series in the first circuit that the power 40 supplies power to the electromagnetic valve 50 of the vacuum circuit breaker; the first controller 30, the first controller 30 is configured to receive the clock signal, output a first signal, and output a second signal after the first switch module 20 is turned on for a first time; the first signal is used to drive the first switch module 20 to be turned on, and the second signal is used to drive the first switch module 20 to be turned off. The power supply 40 supplies power to the holding coil 60 of the vacuum circuit breaker.
Wherein, vacuum circuit breaker: the arc extinguishing medium and the insulating medium in the contact gap after arc extinguishing are both high vacuum, have the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants, transformer substations and locomotives. The first oscillator 10, which is an energy conversion device, is an electronic component for generating repetitive electronic signals (usually sine waves or square waves).
Specifically, during switching on, the power source 40 (which may be a 110V power source 40) inputs, the first oscillator 10 outputs a clock signal to the first controller 30, the first controller 30 outputs a first signal, the first signal drives the first switch module 20 to be turned on, after the first switch module 20 is turned on, a loop of the power source 40 supplying power to the solenoid valve 50 is turned on, the solenoid valve 50 is powered on, an air passage is opened, compressed air flows into the pressure cylinder from the air storage cylinder through the solenoid valve 50, the piston is dragged to move upwards, the main contact of the vacuum circuit breaker is turned on, the first controller 30 outputs a second signal after the first switch module 20 is turned on (the solenoid valve 50 is powered on) for a first time (which may be 600ms), the second signal drives the first switch module 20 to be turned off, a power supply passage between the power source 40 and the solenoid valve 50 is disconnected, the air passage is closed when the solenoid valve 50 is powered off, and the holding coil 60 of the vacuum circuit breaker keeps working, the piston in the vacuum interrupter is held by the magnetic force of the holding coil 60 and the main contacts are kept in a conductive state. Optionally, during switching off, the power supply 40 may be directly stopped to supply power, the coil 60 is kept powered off, and the piston moves downward under the action of the spring tension to drive the main contact to be disconnected. When the switch is opened, the power supply 40 is controlled to stop supplying power, and a switch may be connected in series between the power supply 40 and the power supply object, and the power supply and the power off of the power supply 40 are controlled by controlling the on-off state of the switch.
In one embodiment, as shown in fig. 2, the vacuum circuit breaker control circuit further includes: the air pressure switch 70, the air pressure switch 70 is used for connecting in series between the power supply 40 and the first switch module 20, and is used for conducting when the air pressure in the air reservoir of the vacuum circuit breaker reaches the action value; the first switch module 20 is configured to be turned on when the pneumatic switch 70 is turned on and receives the first signal.
The air pressure switch 70 may be a device capable of detecting the air pressure in the reservoir and outputting a signal. In order to ensure that the first time delayed by the first controller 30 is accurate and effective when the vacuum circuit breaker is switched on, in the control circuit of the vacuum circuit breaker provided in the embodiment of the present application, the air pressure switch 70 is disposed in the air storage tank, and when the air pressure in the air storage tank reaches the action value of the air pressure switch 70, the air pressure switch 70 outputs an electrical signal to the first switch module 20, and the air pressure switch 70 is turned on. When the air pressure switch 70 is turned on and the first controller 30 outputs the first signal, the first switch module 20 is turned on, the air pressure switch 70 and the first controller 30 drive the first switch module 20 to be turned on together, after the first switch module 20 is turned on, a power supply path between the power supply 40 and the electromagnetic valve 50 is turned on, the electromagnetic valve 50 is powered on, an air path is turned on, the piston drives the main contact to be closed, after the first switch module is turned on for a first time, the first controller 30 outputs the second signal to drive the first switch module 20 to be turned off, the electromagnetic valve 50 is powered off, the holding coil 60 continues to work under the power supply of the power supply 40, and the piston is kept in a state capable of closing the main contact under the magnetic action of the holding coil 60.
In one embodiment, the control circuit of the vacuum circuit breaker provided by the embodiment of the present application may be mounted on an aluminum plate, the thickness of the aluminum plate may be 2.5mm, and the external dimensions and the interface thereof may be consistent with the 110V control unit of the vacuum circuit breaker in the exemplary technology. In the case of a vacuum circuit breaker for a locomotive, since the time required for a vacuum circuit breaker control circuit to supply power to the solenoid valve 50 is usually between 575ms and 650ms, the starting time of the control circuit becomes critical to whether the first time to be set by the first controller 30 is accurate.
In one embodiment, the first oscillator 10 may be a precision low power oscillator. The precise low-power oscillator has the characteristics of settable frequency, short power-on setting time, high frequency precision, low temperature coefficient, small working power consumption current, insensitivity to vibration and the like. The power-on setting time of the precise low-power oscillator only needs 1ms, so that the precise low-power oscillator can provide more accurate timing time (first time) for the controller, and the low-temperature coefficient (+ -40 ppm/DEG C) of the precise low-power oscillator can effectively ensure that the control unit stably works within-50 ℃ to +85 ℃, and further improves the operation reliability of the vacuum circuit breaker control circuit provided by the embodiment of the application in a multi-environment. The frequency of the precision low power oscillator can be set, and can be set to a specific frequency required by a controller of a programmable gate array (or a CMOS gate array circuit) type and the like.
The vacuum circuit breaker control circuit that this application embodiment provided through adopting controllers such as oscillator and programmable gate array, replaces electron time relay among the traditional art, avoids because the vacuum circuit breaker switching-on trouble that electron time relay trouble caused, improves vacuum circuit breaker's reliability. In addition, the oscillator is sensitive to vibration, which can improve the accuracy of the delay time of the solenoid valve 50.
In one embodiment, the vacuum interrupter control circuit further comprises: the standby control circuit 80, the standby control circuit 80 is connected in series in a second loop of the power supply 40 for supplying power to the electromagnetic valve 50; a changeover switch 90, the changeover switch 90 being used to select the first circuit or the second circuit.
In order to further improve the operational reliability of the control circuit of the vacuum circuit breaker, the control circuit of the vacuum circuit breaker provided in the embodiment of the present application may include a standby control circuit 80, where the standby control circuit 80 and the first switch module 20 in the above embodiments are located in different loops in which the power supply 40 supplies power to the solenoid valve 50, and when a unit formed by the first oscillator 10, the first controller 30 and the first switch module 20 cannot normally control the power on/off of the solenoid valve 50, the switch 90 is switched from the first loop to the second loop, and the standby control circuit 80 is adopted to control the power on/off of the solenoid valve 50, so as to ensure that the vacuum circuit breaker can be normally switched on, and the locomotive can continue to operate, thereby improving the reliability of the control circuit of the vacuum circuit breaker.
In one embodiment, the standby control circuit 80 includes: a second oscillator for outputting a clock signal; the second switch module is connected in series in the second loop; the second controller is used for receiving the clock signal, outputting the first signal and outputting a second signal after the second switch module is conducted for the first time; the power source 40 and the first switch module 20 are connected in series and then connected to a first input end of the switch 90, the power source 40 and the second switch module are connected in series and then connected to a second input end of the switch 90, an output end of the switch 90 is used for being connected to the electromagnetic valve 50, and an output end of the switch 90 is connected to the first input end or the second input end.
In order to further improve the operational reliability of the control circuit of the vacuum circuit breaker, the standby control circuit 80 may adopt a circuit identical to a circuit formed by connecting the first oscillator 10, the first controller 30 and the first switch module 20 in the above embodiment, when the first oscillator 10, the first controller 30 or the first switch module 20 of the switch 90 fails to cause the first circuit to fail to normally control the power on and power off of the electromagnetic valve 50, the switch 90 may be controlled to switch to the second circuit, and the second oscillator, the second controller and the second switch module on the circuit are adopted to ensure the vacuum circuit breaker to be switched on, so that the locomotive can continue to operate, the reliability of the control circuit of the vacuum circuit breaker is improved, and the locomotive failure or failure caused by the failure of the vacuum circuit breaker is also avoided. The process of switching from the second circuit to the first circuit is similar to the above embodiment. For the switching of the switch 90, when a driver operates the lifting bow, if the current control branch fails to normally control the vacuum circuit breaker to close, the switch 90 is manually switched to another control loop.
In one embodiment, the first switch module 20 includes: a first electronic switch 21, the first electronic switch 21 being configured to turn on and output a first driving signal when receiving a first signal output by the first controller 30, and turn off when receiving a second signal; the second electronic switch 22 is connected with the air pressure switch 70, and is used for being switched on and outputting a second driving signal when the air pressure switch 70 is switched on and receives the first driving signal, and is used for being switched off when the first electronic switch 21 outputs the second signal; and the third electronic switch 23 is connected in series in the first circuit for supplying power to the electromagnetic valve 50 from the power supply 40, and is used for conducting when receiving the second driving signal.
The first electronic switch 21, the second electronic switch 22 and the third electronic switch 23 may be field effect transistors, triodes, etc. When the switch is switched on, the first oscillator 10 provides a clock signal for the first controller 30, the first controller 30 works and outputs a first signal to the first electronic switch 21, at this time, the first electronic switch 21 is switched on to output a first driving signal to the second electronic switch 22, the air pressure switch 70 is switched on when the air pressure of the air storage tank reaches an action value, and also outputs an electric signal to the second electronic switch 22 to drive the second electronic switch 22 to be switched on, the second electronic switch 22 is switched on to output a second driving signal to drive the third electronic switch 23 connected in series between the power supply 40 and the electromagnetic valve 50 to be switched on, the electromagnetic valve 50 is powered on, and at the first time after the first electronic switch 21 is switched on, the first controller 30 outputs a second signal to the first electronic switch 21, the first electronic switch 21 is switched off, then the second electronic switch 23 and the third electronic switch 23 are switched off, and the electromagnetic valve 50 is powered off.
The first electronic switch 21, the second electronic switch 22 and the third electronic switch 23 may be devices such as a triode, for example, NPN, PNP, NMOS transistor, etc., and the specific connection relationship between the first electronic switch and the first controller 30, the pneumatic switch 70 and the switch 90 is determined according to the working implementation process.
In one embodiment, the second switch module comprises: the fourth electronic switch is used for being conducted and outputting a third driving signal when receiving the first signal output by the second controller; the fifth electronic switch is connected with the air pressure switch 70, is used for being switched on and outputting a fourth driving signal when the air pressure switch 70 is switched on and receives the third driving signal, and is used for being switched off when the fourth electronic switch outputs the second signal; and the sixth electronic switch is connected in series in the second loop of the power supply 40 for supplying power to the electromagnetic valve 50 and is used for being conducted when receiving the fourth driving signal.
The second switch module in the standby circuit may adopt the same structure as the first switch module 20 in the above-mentioned embodiment, the second switch module may include a fourth electronic switch, a fifth electronic switch and a sixth electronic switch, wherein the fourth electronic switch corresponds to the first electronic switch 21 in the above-mentioned embodiment, the fifth electronic switch corresponds to the second electronic switch 22 in the above-mentioned embodiment, and the sixth electronic switch corresponds to the third electronic switch 23 in the above-mentioned embodiment, and the operation implementation process of the fourth electronic switch, the fifth electronic switch and the sixth electronic switch may refer to the implementation process of the on/off of the first electronic switch 21, the second electronic switch 22 and the third electronic switch 23 in the above-mentioned embodiment.
In one embodiment, the vacuum interrupter control circuit further comprises: and the voltage reducing circuit 92 is used for converting the voltage of the power supply 40 into the working voltage of the first oscillator 10 and the first controller 30, and providing the working voltage for the first oscillator 10 and the first controller 30.
In order to meet the operating voltage requirements of the devices in the control circuit, the vacuum circuit breaker control circuit may include a voltage reducing circuit 92, and the voltage reducing circuit 92 is configured to convert the voltage of the power source 40 into the operating voltage of the first oscillator 10 and the first controller 30, so as to start the operation. Similarly, the second oscillator and second controller of standby control circuit 80 may be powered using voltage step-down circuit 92.
In one embodiment, the vacuum interrupter control circuit further comprises: and the counter 91 is connected with the electromagnetic valve 50 in parallel and is used for recording the electricity-obtaining times of the electromagnetic valve 50. In order to provide data basis for the use condition of the vacuum circuit breaker matched with the locomotive and later maintenance conveniently, when the locomotive is switched on, the electromagnetic valve 50 is electrified once, the counter 91 is electrified and counts once, and the switching-on times are counted. The counter 91 may count once when detecting that the solenoid valve 50 is powered on and off, i.e., when a complete closing operation is performed.
In one embodiment, the vacuum circuit breaker control circuit provided by the embodiment of the present application further includes: and the display is used for connecting the power supply 40 and displaying the power supply condition of the power supply 40. The display may also be connected to a counter 91 to display the number of switchovers.
In one embodiment, the vacuum circuit breaker control circuit further comprises a first indicator light for being connected in series between the power source 40 and the ground, and emitting light when the power source 40 is powered and works abnormally. The output of the power source 40 may be passed through a fuse, filter circuit, etc. to provide power source 40 to the solenoid valve 50 and the holding coil 60. When the fuse fuses or the power supply 40 fails, the first indicator light works to remind a user of abnormality, and the user can judge that the power supply of the power supply 40 is abnormal (the power supply 40 has a problem or the power supply 40 is protected and filtered) according to the fact that the first indicator light is turned on.
In one embodiment, the vacuum circuit breaker control circuit may further include a second indicator light, the second indicator light is connected in series between the output end of the air pressure switch 70 and the ground, and when the air pressure switch 70 is turned on, the second indicator light is turned on to remind that the air pressure in the reservoir reaches the action value.
In one embodiment, the vacuum circuit breaker control circuit may further include a first diode connected in forward series between the power source 40 and the holding coil 60 to prevent the holding coil 60 from outputting current to the power source 40.
In one embodiment, the vacuum circuit breaker control circuit may further include a third indicator light, a first end of the third indicator light is connected to the end of the holding coil 60, and a second end of the third indicator light is grounded, so as to work when the holding coil 60 is powered, and remind a user whether the holding coil 60 is powered normally or not.
In one embodiment, the vacuum interrupter control circuit further comprises: a first resistor 93, the first resistor 93 being connected in series between the power source 40 and the holding coil 60 of the vacuum circuit breaker; and a second resistor 94, wherein the second resistor 94 is connected in series between the first switch module 20 and the solenoid valve 50, and the second resistor 94 may be a 680 Ω resistor.
In one embodiment, the vacuum interrupter control circuit further comprises: the third resistor 95 is connected in series between the first switch module 20 and the counter 91, and the third resistor 95 is connected in series with the counter 91 to perform a voltage division function. For the vacuum circuit breaker control circuit with the switch 90, the third resistor 95 may be connected in series between the output terminal of the switch 90 and the counter 91, and the third resistor 95 may be a voltage dividing resistor of 1.2 Ω.
In one embodiment, the first electronic switch 21, the second electronic switch 22 and the third electronic switch 23 are all transistors. The first electronic switch 21 and the second electronic switch 22 may be implemented by transistors, which are small in size and convenient for integration. One of the terminals of the first electronic switch 21 (second electronic switch 22/third electronic switch 23) may be connected to the power source 40 through a voltage-reducing circuit 92. After passing through the voltage-reducing circuit 92, the power supply 40 (110V) outputs a voltage meeting the operating requirement of the first electronic switch 21 (the second electronic switch 22/the third electronic switch 23) to provide an operating voltage for the first electronic switch 21 (the second electronic switch 22/the third electronic switch 23). For example, the first electronic switch 21 and the second electronic switch 22 may be NPN transistors, the third electronic switch 23 may be P-channel enhancement MOS transistors, a base of the first electronic switch 21 is connected to the output terminal of the first controller 30, an emitter of the first electronic switch 21 is grounded, a collector of the first electronic switch 21 is connected to the emitter of the second electronic switch 22, a base of the second electronic switch 22 is connected to the power source 40 through the air pressure switch 70, a collector of the second electronic switch 22 is connected to a gate of the third electronic switch 23, a source of the third electronic switch 23 is connected to the power source 40, and a drain of the third electronic switch 23 is connected to the first input terminal of the switch 90. A diode may be connected in series in the forward direction between the power source 40 and the source of the third electronic switch 23.
In one embodiment, the vacuum interrupter control circuit further comprises: the circuit board is provided with an oscillator, a first controller 30, a first switch module 20 and a plug terminal, the plug terminal is connected with the first controller 30, the first switch module 20 and the like, and the plug terminal provides a connection medium for connecting each electrical component on the circuit board with an external power supply 40, an electromagnetic valve 50, a protection coil and other environment components. The first oscillator 10, the first controller 30 and other components are integrated on a circuit board, and are connected to the vacuum circuit breaker and the power supply 40 by providing a multi-bit (for example, 15-bit) plug terminal on the circuit board (the plug terminal is electrically connected to the first switch module 20 on the circuit board, and the specific connection relationship thereof needs to conform to the principle that the control branch supplies power to the solenoid valve 50 and the holding coil 60 in the above embodiment). When a certain part breaks down, other vacuum circuit breaker control circuits can be quickly replaced to realize main breaking control, the normal operation of the locomotive is not influenced, and the economic loss and the safety risk caused by the failure of the vacuum circuit breaker control circuit are greatly reduced. A standby control circuit 80 (second oscillator, second controller, second switch module, etc.) may also be provided on the circuit board.
In one embodiment, the first controller 30 (second controller) is a programmable gate array. The first controller 30 (the second controller) may be a programmable gate array (FPGA), OR a hardware description language (Verilog OR VHDL), which can be quickly programmed to perform testing, AND may be used to implement some logic gates (such as AND, OR, XOR, AND NOT) OR some more complex combination functions. The delay control (first time) of the programmable gate array can be realized by referring to the setting of the delay circuit in the FPGA design in other files.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A vacuum interrupter control circuit, comprising:
a first oscillator to output a clock signal;
the first switch module is connected in series in a first loop of which a power supply supplies power to an electromagnetic valve of the vacuum circuit breaker;
the first controller is used for receiving the clock signal, outputting a first signal and outputting a second signal after the first switch module is conducted for a first time;
the first signal is used for driving the first switch module to be switched on, and the second signal is used for driving the first switch module to be switched off.
2. The vacuum interrupter control circuit of claim 1, further comprising:
the air pressure switch is connected between the power supply and the first switch module in series and used for conducting when the air pressure in an air storage cylinder of the vacuum circuit breaker reaches an action value;
the first switch module is used for being conducted when the air pressure switch is conducted and receives the first signal.
3. The vacuum interrupter control circuit of claim 2, further comprising:
the standby control circuit is connected in series in a second loop of the power supply for supplying power to the electromagnetic valve;
a selector switch for selecting the first loop or the second loop.
4. The vacuum interrupter control circuit of claim 3, wherein the backup control circuit comprises:
a second oscillator for outputting a clock signal;
the second switch module is connected in series in the second loop;
the second controller is used for receiving the clock signal, outputting the first signal and outputting the second signal after the second switch module is conducted for a first time;
the power supply and the first switch module are connected with a first input end of the change-over switch after being connected in series, the power supply and the second switch module are connected with a second input end of the change-over switch after being connected in series, an output end of the change-over switch is used for being connected with the electromagnetic valve, and an output end of the change-over switch is connected with the first input end or the second input end.
5. Vacuum interrupter control circuit according to claim 3 or 4, characterized in that the first switching module comprises:
the first electronic switch is used for being switched on and outputting a first driving signal when receiving a first signal output by the first controller;
the second electronic switch is connected with the air pressure switch, is used for being switched on and outputting a second driving signal when the air pressure switch is switched on and receives the first driving signal, and is used for being switched off when the first electronic switch outputs the second signal;
and the third electronic switch is connected in series in the first loop of the power supply supplying power to the electromagnetic valve and is used for being conducted when the second driving signal is received.
6. The vacuum interrupter control circuit of claim 4, wherein the second switch module comprises:
a fourth electronic switch for turning on and outputting a third driving signal when receiving the first signal output by the second controller;
the fifth electronic switch is connected with the air pressure switch, is used for being switched on and outputting a fourth driving signal when the air pressure switch is switched on and receives the third driving signal, and is used for being switched off when the fourth electronic switch outputs the second signal;
and the sixth electronic switch is connected in series in a second loop of the power supply for supplying power to the electromagnetic valve and is used for being conducted when the fourth driving signal is received.
7. The vacuum interrupter control circuit of claim 1, 2, 3, 4, or 6, further comprising:
and the voltage reduction circuit is used for converting the voltage of the power supply into the working voltage of the first oscillator and the first controller and providing the working voltage for the first oscillator and the first controller.
8. The vacuum interrupter control circuit of claim 1, 2, 3, 4, or 6, further comprising:
and the counter is connected with the electromagnetic valve in parallel and is used for recording the electricity-obtaining times of the electromagnetic valve.
9. The vacuum interrupter control circuit of claim 8, further comprising:
a first resistor connected in series between the power supply and a holding coil of the vacuum circuit breaker;
and the second resistor is connected between the first switch module and the electromagnetic valve in series.
10. The vacuum interrupter control circuit of claim 9, further comprising:
and the third resistor is connected between the first switch module and the counter in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921005021.7U CN210039994U (en) | 2019-06-28 | 2019-06-28 | Control circuit of vacuum circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921005021.7U CN210039994U (en) | 2019-06-28 | 2019-06-28 | Control circuit of vacuum circuit breaker |
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| CN210039994U true CN210039994U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211828A (en) * | 2019-06-28 | 2019-09-06 | 神华包神铁路集团有限责任公司 | Vacuum circuit breaker control circuit |
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2019
- 2019-06-28 CN CN201921005021.7U patent/CN210039994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211828A (en) * | 2019-06-28 | 2019-09-06 | 神华包神铁路集团有限责任公司 | Vacuum circuit breaker control circuit |
| CN110211828B (en) * | 2019-06-28 | 2024-03-29 | 神华包神铁路集团有限责任公司 | Control circuit of vacuum circuit breaker |
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Address after: 014010 No.1, alding street, Kundulun District, Baotou City, Inner Mongolia Autonomous Region Patentee after: Guoneng Baoshen Railway Group Co.,Ltd. Address before: 014010 No.1, alding street, Kundulun District, Baotou City, Inner Mongolia Autonomous Region Patentee before: SHENHUA BAOSHEN RAILWAY GROUP Co.,Ltd. |