Arc extinction circuit, device and system
By designing arc suppression circuits in pulse power supply, and using the coordination of timing modules and signal transmission modules, the timing on and off of pulse power supply is achieved, avoiding the generation of hard arcs, and solving the devices caused by the accumulation of target charge in the prior art Shorten lifespan problem.
Patent Information
- Application Number
- CN202322817062.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-19
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-10-19
AI Technical Summary
During the operation, existing pulsed power supplies are prone to hard arcs due to the accumulation of target charge during the target, which affects the device life.
An arc suppression circuit is designed, including a signal transmission module and a timing module. The timing module performs pulse timing and outputs pulse start and shutdown signals. The control signal transmission module outputs a timed power signal to avoid the accumulation of target charge.
It effectively avoids the generation of hard arcs, extends the service life of the device, and improves the reliability of pulsed power supplies.
Smart Images
Figure CN222282799U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pulse power supply, in particular to an arc extinguishing circuit, a device and a system. Background Art
[0002] With the continuous development of science and technology, the application of electronic equipment is becoming more and more extensive, and the use of electronic equipment requires power support, so the research and development of power supply has become more and more important. Among them, pulse power supply has become a research hotspot in the current power supply field due to its advantages such as high efficiency and energy saving, small size, light weight and excellent performance.
[0003] However, during operation, pulse power supplies are prone to produce hard arcs due to the accumulation of target material charges, which affects the life of the devices connected to them. Therefore, the use of pulse power supplies is limited. There is an urgent need for a pulse power supply arc extinguishing method that can effectively avoid the generation of hard arcs in pulse power supplies.
[0004] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content
[0005] The main purpose of the utility model is to provide an arc extinguishing circuit, device and system, aiming to solve the technical problem that the existing pulse power supply is prone to generate hard arcs due to the accumulation of target material charges during operation, thereby affecting the life of the devices connected thereto.
[0006] To achieve the above object, the utility model provides an arc extinguishing circuit, which comprises: a signal transmission module and a timing module;
[0007] The signal transmission module is connected to the timing module and the load respectively;
[0008] The signal transmission module is used to transmit a pulse enable signal to the timing module;
[0009] The timing module is used to start pulse timing when receiving the pulse enable signal, and output a pulse start signal to the signal transmission module when the timing time reaches a preset output time;
[0010] The signal transmission module is used to output a power signal to the load upon receiving the pulse start signal;
[0011] The timing module is further used to output a pulse closing signal to the signal transmission module when the timing time reaches a preset closing time;
[0012] The signal transmission module is further configured to stop outputting the power signal to the load when receiving the pulse off signal.
[0013] Optionally, the arc extinguishing circuit further includes: a data acquisition module;
[0014] The data acquisition module is connected to the timing module, the signal transmission module and the load respectively;
[0015] The data acquisition module is used to transmit the collected current and voltage signals of the load to the timing module when receiving the data acquisition signal transmitted by the signal transmission module;
[0016] The timing module is further used to transmit the received current and voltage signals to the signal transmission module;
[0017] The signal transmission module is also used to perform ignition detection or PID operation detection based on the current and voltage signals.
[0018] Optionally, the power signal includes: an ignition signal and an operation signal, and the current and voltage signal includes: an ignition current signal;
[0019] The signal transmission module is further used to output the ignition signal to the load, so that the load is ignited based on the ignition signal;
[0020] The data acquisition module is further used to collect the ignition current signal of the load during the ignition process when receiving the first current acquisition signal output by the signal transmission module, and transmit the ignition current signal to the timing module;
[0021] The timing module is further used to transmit the ignition current signal to the signal transmission module;
[0022] The signal transmission module is further configured to output the operation signal to the load when it is detected that the current value of the ignition current signal is greater than or equal to a preset current value, so that the load operates based on the operation signal.
[0023] Optionally, the signal transmission module is further configured to stop outputting the ignition signal to the load when it is detected that the current value of the ignition current signal is less than the preset current value.
[0024] Optionally, the signal transmission module is further used to start delay timing and output a disable signal to the timing module when detecting that the current value of the ignition current signal is less than a preset current value;
[0025] The signal transmission module is further configured to output the pulse enable signal to the timing module when the delay timing reaches a preset delay time.
[0026] Optionally, the signal transmission module includes: a DSP control submodule and a DAC output submodule;
[0027] The DSP control submodule is connected to the timing module and the DAC output submodule respectively, and the DAC output submodule is connected to the load;
[0028] The DSP control submodule is used to transmit the pulse enable signal to the timing module, and output a pulse power signal and an output enable signal to the DAC output submodule upon receiving the pulse start signal fed back by the timing module;
[0029] The DAC output submodule is used to perform digital-to-analog conversion on the pulse power supply signal when receiving the output enable signal, and output the power signal obtained after the conversion to the load.
[0030] Optionally, the current and voltage signals include: an operating current signal;
[0031] The DSP control submodule is further configured to output a PID operation signal to the DAC output submodule when it is detected that the current value of the operation current signal is greater than the target operation current;
[0032] The DAC output submodule is also used to perform digital-to-analog conversion on the PID operation signal, and output the PID power signal obtained after the conversion to the load.
[0033] Optionally, the current and voltage signals include: an operating voltage signal and an operating current signal;
[0034] The DAC output submodule is connected to the data acquisition module;
[0035] The data acquisition module is further used to collect the operating voltage signal of the load during operation, and transmit the operating voltage signal to the timing module;
[0036] The timing module is also used to transmit the operating voltage signal to the DSP control submodule;
[0037] The DSP control submodule is further configured to send a second current acquisition signal to the DAC output submodule when it is detected that the voltage value of the operating voltage signal is less than the voltage value of the preset operating voltage signal;
[0038] The DAC output submodule is further used to transmit the second current acquisition signal to the data acquisition module;
[0039] The data acquisition module is further used to collect the operating current signal of the load during operation when receiving the second current acquisition signal, and transmit the operating current signal to the DSP control submodule through the timing module.
[0040] In addition, to achieve the above-mentioned purpose, the utility model also proposes an arc extinguishing device, which includes the arc extinguishing circuit described in any one of the above items.
[0041] In addition, to achieve the above-mentioned purpose, the utility model also proposes an arc extinguishing system, which includes the arc extinguishing device described above.
[0042] In the utility model, an arc extinguishing circuit, device and system are disclosed, and the arc extinguishing circuit includes: a signal transmission module and a timing module; the signal transmission module is connected to the timing module and the load respectively; the signal transmission module is used to transmit a pulse enable signal to the timing module; the timing module is used to start pulse timing when the pulse enable signal is received, and output a pulse start signal to the signal transmission module when the timing time reaches a preset output time; the signal transmission module is used to output a power signal to the load when the pulse start signal is received; the timing module is also used to output a pulse shutdown signal to the signal transmission module when the timing time reaches a preset shutdown time; the signal transmission module is also used to stop outputting the power signal to the load when the pulse shutdown signal is received. Therefore, the utility model can perform pulse timing through the timing module, and output a pulse signal accordingly, that is, the above-mentioned pulse start signal and pulse shutdown signal, to the signal transmission module, so that the signal transmission module outputs a timed on-off power signal to the load, thereby avoiding the continuous accumulation of target charge, and further avoiding the generation of a hard arc. BRIEF DESCRIPTION OF THE DRAWINGS
[0043] Figure 1 This is a functional module diagram of the first embodiment of the arc extinguishing circuit of the utility model;
[0044] Figure 2 It is a functional module diagram of the second embodiment of the arc extinguishing circuit of the utility model;
[0045] Figure 3 This is a connection diagram of the second embodiment of the arc extinguishing circuit of the utility model;
[0046] Figure 4 This is a schematic diagram of a power signal output cycle of the second embodiment of the arc extinguishing circuit of the utility model;
[0047] Figure 5 It is a functional module diagram of the third embodiment of the arc extinguishing circuit of the utility model;
[0048] Figure 6 It is a signal transmission schematic diagram of the third embodiment of the arc extinguishing circuit of the utility model.
[0049] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0050] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.
[0051] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.
[0052] It should be noted that the descriptions of "first", "second", etc. in the embodiments of the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0053] Reference Figure 1 , Figure 1 This is a functional module diagram of the first embodiment of the arc extinguishing circuit of the utility model.
[0054] like Figure 1 As shown, the arc extinguishing circuit described in this embodiment includes: a signal transmission module 10 and a timing module 20;
[0055] The signal transmission module 10 is connected to the timing module 20 and the load 1 respectively;
[0056] The signal transmission module 10 is used to transmit a pulse enable signal to the timing module 20;
[0057] The timing module 20 is used to start pulse timing when receiving the pulse enable signal, and output a pulse start signal to the signal transmission module 10 when the timing time reaches a preset output time;
[0058] The signal transmission module 10 is used to output a power signal to the load 1 upon receiving the pulse start signal;
[0059] The timing module 20 is further used to output a pulse closing signal to the signal transmission module 10 when the timing time reaches a preset closing time;
[0060] The signal transmission module 10 is further configured to stop outputting the power signal to the load 1 upon receiving the pulse off signal.
[0061] It is understandable that the existing pulse power supply is prone to hard arcing due to the accumulation of target charge during operation, which can easily cause a significant shortening of the device life. Therefore, this embodiment can output a timed shut-off power signal through the arc extinguishing circuit to avoid the continuous accumulation of target charge and prevent the generation of hard arcs. Therefore, this embodiment can output a power signal to the load 1 through the signal transmission module 10, and simultaneously transmit a pulse enable signal to the timing module 20, so that the timing module 20 starts output timing, that is, the above-mentioned pulse timing.
[0062] It should be understood that the output and shut-off of the above-mentioned power signal are periodically cycled and alternated, so the pulse timing can be continuous. Specifically, when the timing time reaches the preset output time, it means that the power signal can be output to the load 1. At this time, the timing module 20 can output a pulse start signal to the signal transmission module 10, and the signal transmission module 10 outputs the power signal to the load 1 accordingly; when the timing time reaches the preset shut-off time, it means that the power signal needs to be shut off. At this time, the timing module 20 can output a pulse shut-off signal to the signal transmission module 10, and the signal transmission module 10 stops outputting the power signal to the load 1 accordingly. Until the timing time reaches the preset output time again, the timing signal outputs a pulse start signal to the signal transmission module 10 again, and enters the next power signal output cycle, that is, the present embodiment can periodically output or shut down the power signal transmitted to the load 1, and the load 1 is a device or equipment powered by the power signal output by the above-mentioned signal transmission module 10.
[0063] It should be noted that, in this embodiment, the main control part of the DSP (Digital Singnal Processor) controller can be used as the main controller of the signal transmission module 10 to perform the timing control of the above-mentioned power signal output on and off, and the timing module 20 can be a timer in the DSP (Digital Singnal Processor) controller. Specifically, in this embodiment, the timer inside the DSP controller can be used as the above-mentioned timing module 20 to perform on-off timing, and after the timing time reaches the preset output timing, the DSP controller turns off the output of the power signal; after the timing time reaches the preset off time, the DSP controller controls the power signal to be output again, wherein the preset output time and the preset off time can be pre-input into the DSP controller through the network interface or the user interface.
[0064] In the present embodiment, an arc extinguishing circuit is disclosed, and the arc extinguishing circuit includes: a signal transmission module and a timing module; the signal transmission module is connected to the timing module and the load respectively; the signal transmission module is used to transmit a pulse enable signal to the timing module; the timing module is used to start pulse timing when the pulse enable signal is received, and output a pulse start signal to the signal transmission module when the timing time reaches the preset output time; the signal transmission module is used to output a power signal to the load when the pulse start signal is received; the timing module is also used to output a pulse close signal to the signal transmission module when the timing time reaches the preset close time; the signal transmission module is also used to stop outputting the power signal to the load when the pulse close signal is received. Therefore, the present embodiment can perform pulse timing through the timing module, and output a pulse signal accordingly, that is, the above-mentioned pulse start signal and pulse close signal, to the signal transmission module, so that the signal transmission module outputs a timed on-off power signal to the load, thereby avoiding the continuous accumulation of target charge, and further avoiding the generation of a hard arc.
[0065] Reference Figure 2 , Figure 2 This is a functional module diagram of the second embodiment of the arc extinguishing circuit of the utility model.
[0066] It is understandable that the first embodiment can use the main control part of the DSP (Digital Singnal Processor) controller as the main controller of the signal transmission module 10, and use the timer inside the DSP (Digital Singnal Processor) controller as the timing module 20 to control the output of the power signal of the timing shutdown, so as to avoid the output of the pulse power supply from generating a hard arc. However, if the DSP controller needs to control the output of the power signal and the timing of the power signal on and off at the same time, the delay of the timing signal is prone to occur in the control process of the DSP controller, thereby causing the pulse power to fail to be timed on and off on time, that is, the timing accuracy of the prior art is not high, and the signal output control accuracy of the DSP controller is low. To solve this problem, the present embodiment can also jointly perform the timing control of the power signal output on and off through the system architecture of the DSP controller + FPGA (Field-Programmable Gate Array) controller, wherein the FPGA controller is responsible for the timing of the output and shutdown, as the above-mentioned timing module 20, and the DSP controller is responsible for the output or shutdown of the power signal according to the timing signal of the FPGA controller, as the above-mentioned signal transmission module 10. Specifically, the DSP controller is responsible for communicating with load 1 and outputting pulse enable signals to the FPGA controller, and the FPGA controller outputs timing pulses corresponding to the enable signals sent by the DSP controller, namely the above-mentioned pulse start signals and pulse shutoff signals. Then, the DSP controller can output and shut down the power signal periodically according to the timing pulses, thereby improving the timing accuracy and enhancing the control accuracy of the power signal output.
[0067] Based on the above first embodiment, a second embodiment of the arc extinguishing circuit of the utility model is proposed. Figure 2 As shown, in this embodiment, the arc extinguishing circuit further includes: a data acquisition module 30;
[0068] The data acquisition module 30 is respectively connected to the timing module 20, the signal transmission module 10 and the load 1;
[0069] The data acquisition module 30 is used to transmit the collected current and voltage signals of the load 1 to the timing module 20 when receiving the data acquisition signal transmitted by the signal transmission module 10;
[0070] The timing module 20 is further used to transmit the received current and voltage signals to the signal transmission module 10;
[0071] The signal transmission module 10 is further used to perform ignition detection or PID operation detection based on the current and voltage signals.
[0072] It should be noted that the data acquisition module 30 can be a module composed of a current and voltage detection circuit and a voltage and current ADC detection chip, such as LTC2298. Since the present embodiment uses an FPGA controller for timing, the data acquisition module 30 in the present embodiment can be connected to the FPGA controller, and the FPGA controller then forwards the current and voltage signals of the load 1 transmitted by the data acquisition module 30 to the signal transmission module 10. Specifically, for ease of understanding, Figure 3 Take this as an example to illustrate: Figure 3 This is a connection diagram of the second embodiment of the arc extinguishing circuit of the utility model, as shown in FIG. Figure 3 As shown, in this embodiment, the FPGA controller is connected to the DSP controller and the voltage and current ADC detection chip, and the DSP controller and the current and voltage detection circuit are both connected to the load 1. At the same time, the voltage and current ADC detection chip is connected to the current and voltage detection circuit, and the analog current and voltage signals collected by the current and voltage detection circuit are converted into digital current and voltage signals and then transmitted to the FPGA controller. Among them, the FPGA controller can be used to receive the current and voltage signals of the load 1 transmitted by the data acquisition module through the DA14 parallel port and the DB14 parallel port, transmit the current and voltage signals representing the voltage and / or current of the load 1 to the DSP controller through the DB14 parallel port, and receive the mode parameters set by the DSP through the serial ports SCI_TX and SCI_RX. The DSP controller can be used to output an enable signal to the FPGA controller so that the FPGA controller generates a pulse start signal and a pulse off signal, thereby realizing the timed shutdown and output of the power signal by real-time detection of the pulse signal output by the FPGA controller; in addition, the DSP controller can receive the current and voltage signals transmitted by the FPGA controller through the DB14 parallel port.
[0073] It is easy to understand that after the signal transmission module 10 outputs the power signal to the load 1, it can be divided into an ignition stage and an operation stage, and it is necessary to detect that the load 1 is successfully ignited in the ignition stage before entering the operation stage. Therefore, further, as an implementable method, in this embodiment, the power signal includes: an ignition signal and an operation signal, and the current and voltage signal includes: an ignition current signal;
[0074] The signal transmission module 10 is further used to output the ignition signal to the load 1, so that the load 1 is ignited based on the ignition signal;
[0075] The data acquisition module 30 is further used to collect the ignition current signal of the load 1 during the ignition process when receiving the first current acquisition signal output by the signal transmission module 10, and transmit the ignition current signal to the timing module 20;
[0076] The timing module 20 is also used to transmit the ignition current signal to the signal transmission module 10;
[0077] The signal transmission module 10 is further configured to output the operation signal to the load 1 when it is detected that the current value of the ignition current signal is greater than or equal to a preset current value, so that the load 1 operates based on the operation signal.
[0078] It should be understood that the above-mentioned ignition signal and operation signal are both power signals, but the amplitude and frequency of the signals will be different. After the ignition signal is output to load 1, load 1 can be ignited based on the ignition signal. During the ignition process, this embodiment can detect whether load 1 is successfully ignited by periodically detecting the current value of load 1. Therefore, in this embodiment, the signal transmission module 10 can periodically transmit the first current acquisition signal to the data acquisition module 30, so that the data acquisition module 30 collects the ignition current signal of load 1 during the ignition process, and transmits the ignition current signal to the timing module 20, and the timing module 20 then transmits the ignition current signal to the signal transmission module 10. When it is detected that the current value of load 1 is greater than or equal to the preset current value, that is, the current value of the ignition current signal is greater than or equal to the preset current value, it can be determined that load 1 is successfully ignited.
[0079] In a specific implementation, the output and shut-off of the power signal can be performed alternately, and the process of outputting the power signal also includes two stages: ignition and operation. Figure 4 Take this as an example to illustrate. Figure 4 FIG. 1 is a schematic diagram of a power signal output cycle of the arc extinguishing circuit according to the second embodiment of the utility model. Figure 4 As shown, T1 is the power signal output time, T4 is the power signal off time, and T1+T4 is a power signal output cycle. T2 is the ignition time, during which the signal transmission module 10 can output an ignition signal to load 1. When it is detected that the current value of load 1 is greater than or equal to the preset current value, it means that load 1 is successfully ignited, and then it enters T3-operation time, at which time the signal transmission module 10 can output an operation signal to load 1. It is easy to understand that, after testing, in this embodiment, T1 can be set to 1950US; the setting time of T2 can be a maximum of 240US and a minimum of 40US; the setting time of T3 can be a maximum of 1950US and a minimum of 1710US; T4 can be set to 50US. In addition, in order to ensure the smooth operation of load 1 during operation, this embodiment can output an operation signal to load 1 after detecting that load 1 is successfully ignited, so that load 1 enters the operation working mode based on the operation signal.
[0080] It is easy to understand that if at the ignition time T2, if it is detected that the load 1 fails to ignite, in order to avoid energy loss, the ignition process can be suspended and the signal transmission module 10 can stop outputting the power signal. Therefore, further, as an implementable embodiment, in this embodiment, the signal transmission module 10 is also used to stop outputting the ignition signal to the load 1 when it is detected that the current value of the ignition current signal is less than the preset current value.
[0081] The signal transmission module 10 is also used to start delay timing and output a disable signal to the timing module 20 when it is detected that the current value of the ignition current signal is less than a preset current value;
[0082] The signal transmission module 10 is further configured to output the pulse enable signal to the timing module 20 when the delay timing reaches a preset delay time.
[0083] It should be noted that due to the hysteresis of signal transmission, in actual applications, the present embodiment can determine that load 1 has an ignition fault when it is detected that the abnormal situation that the current value of load 1 is not greater than the preset current value occurs continuously for more than the preset abnormal number of times. At this time, the signal transmission module 10 can correspondingly shut off the output of the ignition signal, and start the delay timing from the signal transmission module 10 until the delay timing time reaches the preset delay time, and then re-output the pulse enable signal to the timing module 20 and the output ignition signal to load 1 until it is detected that load 1 is ignited successfully, that is, after the current value of load 1 is greater than the preset current value, the DSP controller outputs the running signal to load 1.
[0084] It should be understood that if the present embodiment performs output control of pulse electric signals through the architecture of DSP controller + FPGA controller, then in actual application, the present embodiment can also detect the current of load 1 at a preset time interval through the DSP controller. When the number of consecutive occurrences of the abnormal situation that the current value of load 1 is not greater than the preset current value exceeds the preset number of abnormalities, it is determined that the load 1 has an ignition fault, and the DSP controller can correspondingly shut down the output of the ignition signal, and send a stop signal and a delay timing signal to the FPGA controller. After receiving the stop signal, the FPGA controller can stop outputting the timing pulse to the DSP controller, and start delay timing until the delay timing time reaches the preset delay time, and then output a delay success signal to the DSP controller. After receiving the delay success signal, the DSP controller re-outputs the enable signal to the FPGA controller, and re-outputs the ignition signal to load 1 to start a new round of ignition detection, until it is detected that load 1 is ignited successfully, that is, after the current value of load 1 is greater than the preset current value, the DSP controller outputs a PID operation signal to load 1.
[0085] In this embodiment, the arc extinguishing circuit also includes: a data acquisition module; the data acquisition module is connected to the timing module, the signal transmission module and the load respectively; the data acquisition module is used to transmit the collected current and voltage signals of the load to the timing module when receiving the data acquisition signal transmitted by the signal transmission module; the timing module is also used to transmit the received current and voltage signals to the signal transmission module; the signal transmission module is also used to perform ignition detection or PID operation detection based on the current and voltage signals. The power signal includes: an ignition signal and an operation signal, and the current and voltage signals include: an ignition current signal; the signal transmission module is also used to output the ignition signal to the load so that the load ignites based on the ignition signal; the data acquisition module is also used to collect the ignition current signal of the load during the ignition process when receiving the first current acquisition signal output by the signal transmission module, and transmit the ignition current signal to the timing module; the timing module is also used to transmit the ignition current signal to the signal transmission module; the signal transmission module is also used to output the operation signal to the load when it is detected that the current value of the ignition current signal is greater than or equal to the preset current value, so that the load operates based on the operation signal. The signal transmission module is also used to stop outputting the ignition signal to the load when it is detected that the current value of the ignition current signal is less than the preset current value. The signal transmission module is also used to start the delay timing when it is detected that the current value of the ignition current signal is less than the preset current value, and output the disable signal to the timing module; the signal transmission module is also used to output the pulse enable signal to the timing module when the delay timing reaches the preset delay time. In this embodiment, the timing module can use an FPGA controller, and the FPGA controller outputs a timing signal to the signal transmission module, so that the signal transmission module outputs a timed on-off power signal according to the pulse off signal and the pulse start signal sent by the FPGA controller, thereby improving the timing accuracy and thus improving the control accuracy of the power signal output.
[0086] Reference Figure 5 , Figure 5 It is a functional module diagram of the third embodiment of the arc extinguishing circuit of the present utility model.
[0087] Based on the above first embodiment or second embodiment, a third embodiment of the arc extinguishing circuit of the utility model is proposed. Figure 5 As shown, in this embodiment, the signal transmission module 10 includes: a DSP control submodule 101 and a DAC output submodule 102;
[0088] The DSP control submodule 101 is connected to the timing module 20 and the DAC output submodule 102 respectively, and the DAC output submodule 102 is connected to the load 1;
[0089] The DSP control submodule 101 is used to transmit the pulse enable signal to the timing module 20, and output a power signal and an output enable signal to the DAC output submodule 102 upon receiving the pulse start signal fed back by the timing module 20;
[0090] The DAC output submodule 102 is used to perform digital-to-analog conversion on the power signal when receiving the output enable signal, and output the power signal obtained after the conversion to the load 1.
[0091] It should be understood that, in this embodiment, the DSP control submodule 101 may be the above-mentioned DSP controller, and the power signal outputted by it is a digital signal. Therefore, before outputting it to the load 1, the power signal may be converted from digital to analog through the DAC output submodule 102. Specifically, the DSP control submodule 101 may output the power signal and the output enable signal to the DAC output submodule 102, so that the DAC output submodule 102 performs digital-to-analog conversion on the power signal when receiving the output enable signal, and outputs the power signal obtained after the conversion to the load 1, so that the load 1 may be ignited or operated based on the power signal after the digital-to-analog conversion.
[0092] It is understandable that if a sudden change in current occurs during the output of the pulse power supply, causing excessive charge accumulation, some of the accumulated charge may not be eliminated in the output of the timed on-off power signal, resulting in a hard arc after shutdown and restart. Based on this, the present embodiment can monitor the operating current of load 1 in real time, and when it is detected that the current is too large during operation, load 1 enters the PID constant current operation mode to ensure the arc extinguishing effectiveness of the timed on-off power signal.
[0093] Further, as an implementable method, in this embodiment, the current and voltage signals include: an operating current signal;
[0094] The DSP control submodule 101 is further configured to output a PID operation signal to the DAC output submodule 102 when it is detected that the current value of the operation current signal is greater than the target operation current;
[0095] The DAC output submodule 102 is further used to perform digital-to-analog conversion on the PID operation signal, and output the PID power signal obtained after the conversion to the load 1.
[0096] It is easy to understand that the PID operation signal output by the signal transmission module 10 to the load 1 needs to be adjusted in amplitude or frequency in real time according to the voltage and current signals of the load 1 to ensure the smooth operation of the load 1. The regulation of the PID operation signal can be performed by the signal transmission module 10 itself, but in order to ensure the accuracy of the timing effect, the PID operation signal can also be regulated by an external PID operation module. After receiving the PID power signal, the load 1 can enter the PID constant current operation module to avoid the failure of the arc extinguishing effect of the timed disconnection power signal output.
[0097] It should be noted that, in the present embodiment, the above-mentioned preset operating current may be the operating current threshold of the load 1 pre-set in the signal transmission module 10. When the corresponding operating current during the operation of the load 1 exceeds the current value of the target operating current, it is easy to cause excessive accumulation of target charge, thereby reducing or even eliminating the arc extinguishing effect of the timed on-off power signal. Therefore, when it is detected that the PID operating current of the load 1 exceeds the target operating current, it indicates that the load 1 is prone to enter a working state where the operating current is too large. The DSP control submodule 101 may output the PID operating signal to the DAC output submodule 102, and the DAC output submodule 102 then transmits the analog PID operating signal after digital-to-analog conversion to the load 1, so that the load 1 enters the PID constant current operating mode based on the analog PID operating signal. It is easy to understand that making the load 1 enter the PID constant current operating mode can also play an overcurrent protection role. Based on the above steps, the load 1 can also enter the PID constant voltage operating mode based on the PID operating signal to play an overvoltage protection role. For ease of understanding, with Figure 6 Let's take this as an example to explain. Figure 6 Schematic diagram of signal transmission of the third embodiment of the arc extinguishing circuit of the utility model, as shown in FIG. Figure 6 As shown, in this embodiment, when the DSP controller detects that the current value of the operating current signal is greater than the target operating current based on the digital voltage or digital current signal transmitted by the FPGA controller, the DSP controller outputs a digital PID operating signal to the DAC output submodule 102, and the DAC output submodule 102 converts it into an analog operating signal and outputs it to the load 1.
[0098] It should be understood that the preset target operating current has the risk of not matching the actual working condition of the load 1. Therefore, in order to further improve the protective effect of the overcurrent protection, further, as an implementable method, in this embodiment, the current and voltage signals include: an operating voltage signal and an operating current signal;
[0099] The DAC output submodule 102 is connected to the data acquisition module 30;
[0100] The data acquisition module 30 is further used to collect the operating voltage signal of the load 1 during operation, and transmit the operating voltage signal to the timing module 20;
[0101] The timing module 20 is also used to transmit the operating voltage signal to the DSP control submodule 101;
[0102] The DSP control submodule 101 is further configured to send a second current acquisition signal to the DAC output submodule 102 when it is detected that the voltage value of the operating voltage signal is less than the voltage value of the preset operating voltage signal;
[0103] The DAC output submodule 102 is further used to transmit the second current acquisition signal to the data acquisition module 30;
[0104] The data acquisition module 30 is further used to collect the operating current signal of the load 1 during operation when receiving the second current acquisition signal, and transmit the operating current signal to the DSP control submodule 101 through the timing module 20.
[0105] It can be understood that this embodiment can use the PID operating current corresponding to when load 1 is in an ideal operating state, that is, the voltage value of the PID operating voltage of load 1 is less than the voltage value of the preset operating voltage as the target operating current, so as to ensure that the protection effect of PID constant current control based on the target operating current is better.
[0106] In this embodiment, the signal transmission module includes: a DSP control submodule and a DAC output submodule; the DSP control submodule is connected to the timing module and the DAC output submodule respectively, and the DAC output submodule is connected to the load; the DSP control submodule is used to transmit the pulse enable signal to the timing module, and when receiving the pulse start signal fed back by the timing module, output the power signal and the output enable signal to the DAC output submodule; the DAC output submodule is used to perform digital-to-analog conversion on the power signal when receiving the output enable signal, and output the power signal obtained after the conversion to the load. The current and voltage signals include: an operating current signal; the DSP control submodule is also used to output the PID operating signal to the DAC output submodule when detecting that the current value of the operating current signal is greater than the target operating current; the DAC output submodule is also used to perform digital-to-analog conversion on the PID operating signal, and output the PID power signal obtained after the conversion to the load. The current and voltage signals include: an operating voltage signal and an operating current signal; the DAC output submodule is connected to the data acquisition module; the data acquisition module is also used to collect the operating voltage signal of the load during operation, and transmit the operating voltage signal to the timing module; the timing module is also used to transmit the operating voltage signal to the DSP control submodule; the DSP control submodule is also used to send a second current acquisition signal to the DAC output submodule when it is detected that the voltage value of the operating voltage signal is less than the voltage value of the preset operating voltage signal; the DAC output submodule is also used to transmit the second current acquisition signal to the data acquisition module; the data acquisition module is also used to collect the operating current signal of the load during operation when receiving the second current acquisition signal, and transmit the operating current signal to the DSP control submodule through the timing module. This embodiment can monitor the operating current of the load in real time, and enter the PID operation mode when it is detected that the operating current is too large, so as to ensure the arc extinguishing effectiveness of the timed disconnection power signal and realize the overcurrent protection of the load. In addition, this embodiment can also set the target operating current by the preset operating voltage of the load to improve the protection effect of PID constant current control based on the target operating current.
[0107] To achieve the above purpose, the utility model also proposes an arc extinguishing device, which includes the arc extinguishing circuit as described above. The specific structure of the arc extinguishing circuit refers to the above embodiment. Since the arc extinguishing device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0108] To achieve the above purpose, the utility model also proposes an arc extinguishing system, which includes the arc extinguishing device as described above. The specific structure of the arc extinguishing device refers to the above embodiment. Since the arc extinguishing system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0109] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An arc extinguishing circuit, characterized in that: The arc extinguishing circuit comprises: a signal transmission module and a timing module; The signal transmission module is connected to the timing module and the load respectively; The signal transmission module is used to transmit a pulse enable signal to the timing module; The timing module is used to start pulse timing when receiving the pulse enable signal, and output a pulse start signal to the signal transmission module when the timing time reaches a preset output time; The signal transmission module is used to output a power signal to the load upon receiving the pulse start signal; The timing module is further used to output a pulse closing signal to the signal transmission module when the timing time reaches a preset closing time; The signal transmission module is further configured to stop outputting the power signal to the load when receiving the pulse off signal.
2. The arc extinguishing circuit according to claim 1, characterized in that: The arc extinguishing circuit further includes: a data acquisition module; The data acquisition module is connected to the timing module, the signal transmission module and the load respectively; The data acquisition module is used to transmit the collected current and voltage signals of the load to the timing module when receiving the data acquisition signal transmitted by the signal transmission module; The timing module is further used to transmit the received current and voltage signals to the signal transmission module; The signal transmission module is also used to perform ignition detection or PID operation detection based on the current and voltage signals.
3. The arc extinguishing circuit according to claim 2, characterized in that: The power signal includes: an ignition signal and an operation signal, and the current and voltage signal includes: an ignition current signal; The signal transmission module is further used to output the ignition signal to the load, so that the load is ignited based on the ignition signal; The data acquisition module is further used to collect the ignition current signal of the load during the ignition process when receiving the first current acquisition signal output by the signal transmission module, and transmit the ignition current signal to the timing module; The timing module is further used to transmit the ignition current signal to the signal transmission module; The signal transmission module is further configured to output the operation signal to the load when it is detected that the current value of the ignition current signal is greater than or equal to a preset current value, so that the load operates based on the operation signal.
4. The arc extinguishing circuit according to claim 3, characterized in that: The signal transmission module is further configured to stop outputting the ignition signal to the load when it is detected that the current value of the ignition current signal is less than the preset current value.
5. The arc extinguishing circuit according to claim 4, characterized in that: The signal transmission module is further used to start delay timing and output a disable signal to the timing module when detecting that the current value of the ignition current signal is less than a preset current value; The signal transmission module is further configured to output the pulse enable signal to the timing module when the delay timing reaches a preset delay time.
6. The arc extinguishing circuit according to claim 5, characterized in that: The signal transmission module includes: a DSP control submodule and a DAC output submodule; The DSP control submodule is connected to the timing module and the DAC output submodule respectively, and the DAC output submodule is connected to the load; The DSP control submodule is used to transmit the pulse enable signal to the timing module, and output a pulse power signal and an output enable signal to the DAC output submodule upon receiving the pulse start signal fed back by the timing module; The DAC output submodule is used to perform digital-to-analog conversion on the pulse power supply signal when receiving the output enable signal, and output the power signal obtained after the conversion to the load.
7. The arc extinguishing circuit according to claim 6, characterized in that: The current and voltage signals include: an operating current signal; The DSP control submodule is further configured to output a PID operation signal to the DAC output submodule when it is detected that the current value of the operation current signal is greater than the target operation current; The DAC output submodule is also used to perform digital-to-analog conversion on the PID operation signal, and output the PID power signal obtained after the conversion to the load.
8. The arc extinguishing circuit according to claim 7, characterized in that: The current and voltage signals include: an operating voltage signal and an operating current signal; The DAC output submodule is connected to the data acquisition module; The data acquisition module is further used to collect the operating voltage signal of the load during operation, and transmit the operating voltage signal to the timing module; The timing module is also used to transmit the operating voltage signal to the DSP control submodule; The DSP control submodule is further configured to send a second current acquisition signal to the DAC output submodule when it is detected that the voltage value of the operating voltage signal is less than the voltage value of the preset operating voltage signal; The DAC output submodule is further used to transmit the second current acquisition signal to the data acquisition module; The data acquisition module is further used to collect the operating current signal of the load during operation when receiving the second current acquisition signal, and transmit the operating current signal to the DSP control submodule through the timing module.
9. An arc extinguishing device, characterized in that: The arc extinguishing device comprises the arc extinguishing circuit described in any one of claims 1-8.
10. An arc extinguishing system, characterized in that: The arc extinguishing system comprises the arc extinguishing device according to claim 9.