CN217133287U - Synchronous machine excitation silicon controlled rectifier trigger pulse monitoring device - Google Patents
Synchronous machine excitation silicon controlled rectifier trigger pulse monitoring device Download PDFInfo
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- CN217133287U CN217133287U CN202220739367.5U CN202220739367U CN217133287U CN 217133287 U CN217133287 U CN 217133287U CN 202220739367 U CN202220739367 U CN 202220739367U CN 217133287 U CN217133287 U CN 217133287U
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Abstract
The utility model discloses a synchronous machine excitation silicon controlled rectifier trigger pulse monitoring arrangement, including three-phase trigger pulse generator, PLC controller and touch-sensitive screen, three-phase trigger pulse generator's three-phase trigger pulse output is used for triggering synchronous machine excitation silicon controlled rectifier, and PLC controller signal output passes through HMI interface connection touch-sensitive screen, three-phase trigger pulse generator's three-phase trigger pulse output still connects PLC controller signal input end through an isolation conversion circuit, and isolation conversion circuit converts three-phase trigger pulse signal output into single-phase pulse signal output, and single-phase pulse signal output sends to the touch-sensitive screen through PLC controller and HMI interface and shows in real time and incident record; the utility model discloses a with a monitoring circuit with fixed mode access pulse signal to the silicon controlled rectifier and carry out the pulse and keep watch on, also avoided artifical temporary access to careless the risk emergence that will appear touching adjacent circuit, cause the accident easily simultaneously.
Description
Technical Field
The utility model relates to a synchronous quick-witted excitation silicon controlled rectifier trigger pulse monitoring arrangement.
Background
The operation of the synchronous machine needs to provide exciting current for a rotor coil of the rotor, and the exciting current is provided by silicon controlled rectifier rectification, so that the normal operation of the silicon controlled rectifier rectification is important. The normal operation of the controllable silicon can be normally operated only by continuous pulse signals, so the monitoring of the controllable silicon trigger pulse signals is particularly important, at present, in the static electrifying aging process, personnel use an instrument to temporarily access to check whether the pulse signals are normally sent out or not, if the trigger pulse is lost for a short time, the personnel can not find the pulse signals easily, and if the pulse signals are lost in the normal working state, unexpected problems are brought to the operation of a synchronous machine and the whole machine set by long-term operation, and the fault risk can occur; moreover, due to the fact that the device is in a working state, the requirement for checking personnel for manual temporary access is high, and because the risk of touching adjacent circuits happens carelessly slightly, accidents are easily caused.
Disclosure of Invention
The utility model aims at providing a synchronous quick-witted excitation silicon controlled rectifier trigger pulse monitoring devices carries out the pulse through inserting the pulse signal to the silicon controlled rectifier with fixed mode with a test circuit and keeps watch on, realizes the trigger pulse signal automatic supervision when silicon controlled rectifier trigger circuit device work operation.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a synchronous machine excitation silicon controlled rectifier trigger pulse monitoring arrangement, includes three-phase trigger pulse generator, PLC controller and touch-sensitive screen, and three-phase trigger pulse generator's three-phase trigger pulse output is used for triggering synchronous machine excitation silicon controlled rectifier, and PLC controller signal output passes through HMI interface connection touch-sensitive screen, wherein: the three-phase trigger pulse output of the three-phase trigger pulse generator is also connected with a signal input end of the PLC through an isolation conversion circuit, the isolation conversion circuit converts the three-phase trigger pulse signal output into a single-phase pulse signal output, and the single-phase pulse signal output is sent to the touch screen through the PLC and the HMI for real-time display and event recording.
The scheme is further as follows: the isolation conversion circuit comprises three photoelectric isolation circuits, three input ends of the three photoelectric isolation circuits are connected with three-phase trigger pulse signals, three output ends of the three photoelectric isolation circuits are respectively connected with three signal holding capacitors, the three signal holding capacitors are mutually connected in series, and two ends of the three signal holding capacitors which are connected in series form a single-phase pulse signal output to be connected with a signal input end of the PLC.
The scheme is further as follows: the signal holding capacitor adopts a capacitor of 10 to 25 microfarads.
The scheme is further as follows: and the starting switch is connected with the PLC, the isolation conversion circuit and the touch screen at the same time and provides a working power supply for the PLC, the isolation conversion circuit and the touch screen.
The utility model has the advantages that: pulse monitoring is carried out on the pulse signal of the silicon controlled rectifier by connecting a monitoring circuit in a fixed mode, the adopted photoelectric isolation is safe, the pulse signal cannot be influenced, automatic monitoring on the trigger pulse signal during static electrification and aging of the silicon controlled rectifier trigger circuit is realized, and meanwhile, the risk that the personnel are required to be checked to be high by manual temporary connection, adjacent circuits are touched and accidents are easily caused due to slight carelessness is avoided.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic diagram of the circuit block diagram structure of the present invention;
fig. 2 is a logic diagram of the isolation switching circuit of the present invention.
Detailed Description
A synchronous Machine excitation controllable silicon trigger pulse monitoring device is disclosed, as shown in fig. 1 and fig. 2, the controllable silicon trigger pulse monitoring device comprises a three-phase trigger pulse generator 1, a PLC controller 2 and a touch screen 3, the three-phase trigger pulse output of the three-phase trigger pulse generator is used for triggering a synchronous Machine excitation controllable silicon 4, the signal output of the PLC controller is connected with the touch screen 3 (a touch screen containing an HMI Interface through an HMI Interface) Interface 301, the display picture is set through the HMI Interface, the embodiment uses a touch screen containing an HMI Interface of Wenlong technology Limited MT6071iE series, the HMI Interface can be an independent component to connect with the touch screen, wherein, the three-phase trigger pulse output of the three-phase trigger pulse generator is also simultaneously connected with an isolation conversion circuit 5, the three-phase trigger pulse generator is connected with the signal input end of the PLC controller 2 through the isolation conversion circuit 5, as shown in fig. 2, the isolation conversion circuit 5 converts the three-phase trigger pulse signal output of the three-phase trigger pulse generator 1 into a single-phase pulse signal output, and the single-phase pulse signal output is sent to the touch screen 3 via the PLC controller 2 and the HMI interface 301 for real-time display and event recording. In this embodiment, the PLC controller 2 is connected to the touch screen 3 including the HMI interface 301 through the RS485 communication cable.
Wherein: in order to avoid the influence of access on the three-phase trigger pulse generator, the isolation conversion circuit adopts an electrical isolation sampling circuit. Therefore, the isolation and conversion circuit includes three optoelectronic isolation circuits 501 (integrated circuit chips), three input terminals of the three optoelectronic isolation circuits 501 are connected with a three-phase trigger pulse signal through a protection resistor R and a diode D, an anode of the diode D is connected with an anode output of the pulse, a cathode of the diode D is connected with a cathode of the pulse, an anode output of the anode connection pulse is connected with an anode input terminal of the optoelectronic isolation circuit 501 through a current-limiting protection resistor R, three outputs of the three optoelectronic isolation circuits are three independent pulse outputs, then three output terminals of the three optoelectronic isolation circuits are respectively connected with three signal holding capacitors C, the three signal holding capacitors C are connected in series with each other, that is, the three independent pulse outputs are connected in series, finally, two ends of the three signal holding capacitors connected in series form a single-phase pulse signal output which is connected with a signal input terminal of the PLC controller 2, thus, the single-phase pulse signal output is interrupted in case of missing one independent pulse output.
In the embodiment, since the trigger pulse signal is a pulse with a width of several milliseconds, the output of the single-phase pulse signal is unstable when the capacity of the capacitor is too small or too large, that is: the phenomenon of pulse loss cannot be reflected, and after a plurality of experiments, the signal holding capacitor adopts a capacitor of 10 to 25 microfarads.
In this embodiment: a starting switch 6 provides a working power supply 7 for the three-phase trigger pulse generator 1, and in order to achieve synchronous operation, the starting switch 6 is simultaneously connected with the PLC controller 2, the isolation conversion circuit 5 and the touch screen 3 (including an HMI interface), and provides the working power supply 7 for the PLC controller 2, the isolation conversion circuit 5 and the touch screen 3. After the power starting switch 6 is switched on, the three-phase trigger pulse generator 1 is powered on to start working, the PLC controller 2 also starts to perform trigger pulse monitoring work after receiving a switching-on signal of the power starting switch 6, and then the trigger pulse monitoring work is connected to the HMI touch screen 3 through an RS485 communication cable to perform monitoring recording. When the power starting switch 6 is switched off, the three-phase trigger pulse generator 1 stops working, the PLC 2 also finishes the trigger pulse monitoring work after receiving the switching-off signal of the power starting switch 6, and the HMI touch screen 3 finishes the monitoring and recording work.
According to the embodiment of the monitoring device for the trigger pulse of the synchronous machine excitation silicon controlled rectifier, the pulse signal of the silicon controlled rectifier is monitored in a pulse mode by connecting a monitoring circuit in a fixed mode, the adopted photoelectric isolation is safe, the pulse signal cannot be influenced, the automatic monitoring of the trigger pulse signal during static electrification and aging of the silicon controlled rectifier trigger circuit is realized, and the risk that the requirement for checking personnel is high, the adjacent circuit is touched and the accident is easily caused due to the fact that the monitoring circuit is temporarily connected manually is avoided.
Claims (4)
1. The device is characterized in that the three-phase trigger pulse output of the three-phase trigger pulse generator is also connected with a signal input end of the PLC through an isolation conversion circuit, the isolation conversion circuit converts the three-phase trigger pulse signal output into a single-phase pulse signal output, and the single-phase pulse signal output is sent to the touch screen through the PLC and the HMI to be displayed in real time and recorded in an event.
2. The device for monitoring the trigger pulse of the synchronous machine excitation SCR according to claim 1, wherein the isolation conversion circuit comprises three optoelectronic isolation circuits, three input terminals of the three optoelectronic isolation circuits are connected with the three-phase trigger pulse signal, three output terminals of the three optoelectronic isolation circuits are respectively connected with three signal holding capacitors, the three signal holding capacitors are connected in series, and two ends of the three signal holding capacitors connected in series form a single-phase pulse signal output to be connected with the signal input terminal of the PLC.
3. The apparatus as claimed in claim 1, wherein the signal holding capacitor is a 10 to 25 microfarad capacitor.
4. The monitoring device for the trigger pulse of the synchronous machine excitation SCR according to claim 1, wherein a start switch provides a working power supply for the three-phase trigger pulse generator, and the start switch is simultaneously connected to the PLC controller, the isolation converting circuit and the touch screen to provide the working power supply for the PLC controller, the isolation converting circuit and the touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220739367.5U CN217133287U (en) | 2022-04-01 | 2022-04-01 | Synchronous machine excitation silicon controlled rectifier trigger pulse monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220739367.5U CN217133287U (en) | 2022-04-01 | 2022-04-01 | Synchronous machine excitation silicon controlled rectifier trigger pulse monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217133287U true CN217133287U (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220739367.5U Active CN217133287U (en) | 2022-04-01 | 2022-04-01 | Synchronous machine excitation silicon controlled rectifier trigger pulse monitoring device |
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| CN (1) | CN217133287U (en) |
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- 2022-04-01 CN CN202220739367.5U patent/CN217133287U/en active Active
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