CN206697997U - Photovoltaic generating system charge-discharge circuit - Google Patents
Photovoltaic generating system charge-discharge circuit Download PDFInfo
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- CN206697997U CN206697997U CN201720241908.0U CN201720241908U CN206697997U CN 206697997 U CN206697997 U CN 206697997U CN 201720241908 U CN201720241908 U CN 201720241908U CN 206697997 U CN206697997 U CN 206697997U
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- 239000003990 capacitor Substances 0.000 claims abstract description 93
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 33
- 238000010248 power generation Methods 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 8
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
本实用新型公开了一种光伏发电系统充放电电路，包括太阳能电池组件、稳压滤波电路、DC/DC变换电路、负载、多个过充保护电路、多个双向DC/DC电路和多个蓄电池，稳压滤波电路包括三极管、稳压二极管、整流器、第一电阻、第二电阻、第三泄放电阻、第四电阻、第五电阻、第一电容、第二电容、第三电容、第四电容、第五电容、第一电感、第二共模电感和第三共模电感，第一电阻的一端和第四电阻的一端均连接电压输入端的正极连接，第四电阻的另一端与三极管的集电极连接，三极管的基极与第五电容的一端连接，第五电容的另一端分别与第一电阻的另一端、稳压二极管的负极和第一电容的一端连接。本实用新型电路的安全性和可靠性较高。
The utility model discloses a charging and discharging circuit of a photovoltaic power generation system, which comprises a solar cell assembly, a voltage stabilizing filter circuit, a DC/DC conversion circuit, a load, a plurality of overcharge protection circuits, a plurality of bidirectional DC/DC circuits and a plurality of accumulators , the voltage stabilizing filter circuit includes a triode, a Zener diode, a rectifier, a first resistor, a second resistor, a third bleeder resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth Capacitor, fifth capacitor, first inductance, second common-mode inductance and third common-mode inductance, one end of the first resistor and one end of the fourth resistor are connected to the positive pole of the voltage input terminal, and the other end of the fourth resistor is connected to the triode The collector is connected, the base of the triode is connected to one end of the fifth capacitor, and the other end of the fifth capacitor is respectively connected to the other end of the first resistor, the negative pole of the Zener diode and one end of the first capacitor. The circuit of the utility model has higher safety and reliability.
Description
技术领域technical field
本实用新型涉及光伏发电领域，特别涉及一种光伏发电系统充放电电路。The utility model relates to the field of photovoltaic power generation, in particular to a charging and discharging circuit for a photovoltaic power generation system.
背景技术Background technique
太阳能发电系统由太阳能电池组、太阳能控制器、蓄电池(组)组成。如输出电源为交流220V或110V，还需要配置逆变器。在独立太阳能发电系统中，为了降低成本、提高效率和可靠性，既要使光伏电池输出最大功率，又要使蓄电池正确充放电，同时还要最大限度地利用所发电能。现有的太阳能发电系统的充放电电路由于缺少相应的电路保护功能，造成电路的安全性和可靠性较低。The solar power generation system is composed of a solar cell group, a solar controller, and a storage battery (group). If the output power is AC 220V or 110V, an inverter is also required. In an independent solar power generation system, in order to reduce costs, improve efficiency and reliability, it is necessary not only to maximize the output power of photovoltaic cells, but also to correctly charge and discharge batteries, and to maximize the use of generated energy. Due to the lack of corresponding circuit protection functions in the charging and discharging circuits of the existing solar power generation systems, the safety and reliability of the circuits are relatively low.
实用新型内容Utility model content
本实用新型要解决的技术问题在于，针对现有技术的上述缺陷，提供一种电路的安全性和可靠性较高的光伏发电系统充放电电路。The technical problem to be solved by the utility model is to provide a charging and discharging circuit for a photovoltaic power generation system with high circuit safety and reliability in view of the above-mentioned defects of the prior art.
本实用新型解决其技术问题所采用的技术方案是：构造一种光伏发电系统充放电电路，包括太阳能电池组件、稳压滤波电路、DC/DC变换电路、负载、多个过充保护电路、多个双向DC/DC电路和多个蓄电池，所述太阳能组件通过所述稳压滤波电路与所述DC/DC变换电路的一端连接，所述DC/DC变换电路的另一端分别与所述负载和多个过充保护电路连接，每个所述过充保护电路均通过一个所述双向DC/DC电路与一个所述蓄电池连接；The technical scheme adopted by the utility model to solve the technical problem is: to construct a charging and discharging circuit for a photovoltaic power generation system, including a solar cell assembly, a voltage stabilizing filter circuit, a DC/DC conversion circuit, a load, multiple overcharge protection circuits, multiple a bidirectional DC/DC circuit and a plurality of accumulators, the solar module is connected to one end of the DC/DC conversion circuit through the voltage stabilization filter circuit, and the other end of the DC/DC conversion circuit is respectively connected to the load and the A plurality of overcharge protection circuits are connected, and each of the overcharge protection circuits is connected to one of the storage batteries through one of the bidirectional DC/DC circuits;
所述稳压滤波电路包括三极管、稳压二极管、整流器、第一电阻、第二电阻、第三泄放电阻、第四电阻、第五电阻、第一电容、第二电容、第三电容、第四电容、第五电容、第一电感、第二共模电感和第三共模电感，所述第一电阻的一端和第四电阻的一端均连接电压输入端的正极连接，所述第四电阻的另一端与所述三极管的集电极连接，所述三极管的基极与所述第五电容的一端连接，所述第五电容的另一端分别与所述第一电阻的另一端、稳压二极管的负极和第一电容的一端连接，所述稳压二极管的正极和第一电容的另一端均连接电压输入端的负极，所述三极管的发射极分别与所述第三泄放电阻的一端和第二电容的一端连接，所述第三泄放电阻的另一端和第二电容的另一端均与所述电压输入端的负极连接，所述第三共模电感的一端与所述第二电容的一端连接，所述第二共模电感的一端与所述第二电容的另一端连接，所述第三共模电感的另一端与所述第三电容的一端连接，所述第二共模电感的另一端与所述第三电容的另一端连接，所述整流器的交流输入端的正极与所述第三电容的一端连接，所述整流器的交流输入端的负极与所述第三电容的另一端连接，所述整流器的直流输出端的正极分别与所述第一电感的一端和第二电阻的一端连接，所述第一电感的另一端和第二电阻的另一端均与所述第四电容的一端连接，所述第四电容的另一端接地，所述整流器的直流输出端的负极接地。The voltage stabilizing filter circuit includes a triode, a voltage stabilizing diode, a rectifier, a first resistor, a second resistor, a third bleeder resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a Four capacitors, a fifth capacitor, a first inductor, a second common-mode inductor, and a third common-mode inductor, one end of the first resistor and one end of the fourth resistor are both connected to the positive terminal of the voltage input terminal, and the fourth resistor The other end is connected to the collector of the triode, the base of the triode is connected to one end of the fifth capacitor, and the other end of the fifth capacitor is respectively connected to the other end of the first resistor and the Zener diode. The negative pole is connected to one end of the first capacitor, the positive pole of the Zener diode and the other end of the first capacitor are connected to the negative pole of the voltage input terminal, and the emitter of the triode is respectively connected to one end of the third discharge resistor and the second One end of the capacitor is connected, the other end of the third discharge resistor and the other end of the second capacitor are both connected to the negative pole of the voltage input end, and one end of the third common mode inductor is connected to one end of the second capacitor , one end of the second common-mode inductor is connected to the other end of the second capacitor, the other end of the third common-mode inductor is connected to one end of the third capacitor, and the other end of the second common-mode inductor One end is connected to the other end of the third capacitor, the positive pole of the AC input end of the rectifier is connected to one end of the third capacitor, and the negative pole of the AC input end of the rectifier is connected to the other end of the third capacitor, so The anode of the DC output terminal of the rectifier is respectively connected to one end of the first inductor and one end of the second resistor, and the other end of the first inductor and the other end of the second resistor are both connected to one end of the fourth capacitor, The other end of the fourth capacitor is grounded, and the negative pole of the DC output terminal of the rectifier is grounded.
在本实用新型所述的光伏发电系统充放电电路中，所述稳压滤波电路还包括第六电阻，所述第六电阻的一端与所述第一电阻的另一端连接，所述第六电阻的另一端与所述第五电容的另一端连接。In the charging and discharging circuit of the photovoltaic power generation system described in the present invention, the voltage stabilizing filter circuit further includes a sixth resistor, one end of the sixth resistor is connected to the other end of the first resistor, and the sixth resistor The other end of the capacitor is connected to the other end of the fifth capacitor.
在本实用新型所述的光伏发电系统充放电电路中，所述稳压滤波电路还包括第七电阻，所述第七电阻的一端与所述第五电容的另一端连接，所述第七电阻的另一端与所述第一电容的一端连接。In the charging and discharging circuit of the photovoltaic power generation system described in the utility model, the voltage stabilizing filter circuit further includes a seventh resistor, one end of the seventh resistor is connected to the other end of the fifth capacitor, and the seventh resistor The other end of the capacitor is connected to one end of the first capacitor.
在本实用新型所述的光伏发电系统充放电电路中，所述稳压滤波电路还包括第八电阻，所述第八电阻的一端与所述第三泄放电阻的一端连接，所述第八电阻的另一端与所述第二电容的一端连接。In the charging and discharging circuit of the photovoltaic power generation system described in the present invention, the voltage stabilizing filter circuit further includes an eighth resistor, one end of the eighth resistor is connected to one end of the third discharge resistor, and the eighth resistor The other end of the resistor is connected to one end of the second capacitor.
在本实用新型所述的光伏发电系统充放电电路中，所述稳压滤波电路还包括第九电阻，所述第九电阻的一端与所述第三电容的一端连接，所述第九电阻的另一端与所述整流器的交流输入端的正极连接。In the charging and discharging circuit of the photovoltaic power generation system described in the present invention, the voltage stabilizing filter circuit further includes a ninth resistor, one end of the ninth resistor is connected to one end of the third capacitor, and the ninth resistor The other end is connected with the positive pole of the AC input end of the rectifier.
在本实用新型所述的光伏发电系统充放电电路中，所述稳压滤波电路还包括第十电阻，所述第十电阻的一端与所述整流器的直流输出端的正极连接，所述第十电阻的另一端与所述第一电感的一端连接。In the charging and discharging circuit of the photovoltaic power generation system described in the utility model, the voltage stabilizing filter circuit further includes a tenth resistor, one end of the tenth resistor is connected to the positive pole of the DC output terminal of the rectifier, and the tenth resistor The other end of is connected to one end of the first inductor.
实施本实用新型的光伏发电系统充放电电路，具有以下有益效果：由于设有太阳能电池组件、稳压滤波电路、DC/DC变换电路、负载、多个过充保护电路、多个双向DC/DC电路和多个蓄电池；稳压滤波电路包括三极管、稳压二极管、整流器、第一电阻、第二电阻、第三泄放电阻、第四电阻、第五电阻、第一电容、第二电容、第三电容、第四电容、第五电容、第一电感、第二共模电感和第三共模电感，第四电阻和第五电阻均用进行过流保护，第五电容用于防止三极管Q1和稳压二极管之间的干扰，所以电路的安全性和可靠性较高。Implementing the charging and discharging circuit of the photovoltaic power generation system of the present utility model has the following beneficial effects: due to the installation of solar cell components, voltage stabilizing filter circuits, DC/DC conversion circuits, loads, multiple overcharge protection circuits, and multiple bidirectional DC/DC circuit and a plurality of accumulators; the voltage stabilizing filter circuit includes a triode, a voltage stabilizing diode, a rectifier, a first resistor, a second resistor, a third discharge resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, and a first capacitor The third capacitor, the fourth capacitor, the fifth capacitor, the first inductor, the second common-mode inductor and the third common-mode inductor, the fourth resistor and the fifth resistor are used for overcurrent protection, and the fifth capacitor is used to prevent the triode Q1 and Interference between Zener diodes, so the safety and reliability of the circuit is higher.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.
图1为本实用新型光伏发电系统充放电电路一个实施例中的结构示意图；Fig. 1 is the structure diagram in an embodiment of the charging and discharging circuit of the photovoltaic power generation system of the present invention;
图2为所述实施例中稳压滤波电路的电路原理图。Fig. 2 is a schematic circuit diagram of the voltage stabilizing filter circuit in the embodiment.
具体实施方式detailed description
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
在本实用新型光伏发电系统充放电电路实施例中，该光伏发电系统充放电电路的结构示意图如图1所示。图1中，该具有稳压滤波的光伏发电系统充放电电路包括太阳能电池组件1、稳压滤波电路2、DC/DC变换电路3、负载4、多个过充保护电路5、多个双向DC/DC电路6和多个蓄电池7，太阳能组件1 通过稳压滤波电路2与DC/DC变换电路3的一端连接，DC/DC变换电路3的另一端分别与负载4和多个过充保护电路5连接，每个过充保护电路5均通过一个双向DC/DC电路3与一个蓄电池7连接。In the embodiment of the charging and discharging circuit of the photovoltaic power generation system of the present invention, the structural diagram of the charging and discharging circuit of the photovoltaic power generation system is shown in FIG. 1 . In Fig. 1, the charging and discharging circuit of the photovoltaic power generation system with voltage stabilizing filter includes a solar battery module 1, a voltage stabilizing filter circuit 2, a DC/DC conversion circuit 3, a load 4, multiple overcharge protection circuits 5, multiple bidirectional DC /DC circuit 6 and a plurality of storage batteries 7, the solar module 1 is connected to one end of the DC/DC conversion circuit 3 through the voltage stabilization filter circuit 2, and the other end of the DC/DC conversion circuit 3 is respectively connected to the load 4 and a plurality of overcharge protection circuits 5, each overcharge protection circuit 5 is connected to a storage battery 7 through a bidirectional DC/DC circuit 3.
光伏电池的最大功率点电压、电流在不同的情况下是变化的，所以，在负载4不变的情况下，就需要系统同时调节充电电流来协调光伏电池最大功率跟踪，这样才能实现光伏电池最大功率输出。为实现光伏电池最大功率输出时对蓄电池BA进行最佳充放电，负载4确定后，控制器同时同方向调整DC/DC变换电路3和充电器的占空比D，实现最佳充电，也使放电的蓄电池BA按最佳放电电流放电。The maximum power point voltage and current of photovoltaic cells vary under different conditions. Therefore, when the load 4 remains unchanged, the system needs to adjust the charging current at the same time to coordinate the maximum power tracking of photovoltaic cells, so as to realize the maximum power of photovoltaic cells. power output. In order to realize the optimal charging and discharging of the battery BA when the maximum power output of the photovoltaic cell is achieved, after the load 4 is determined, the controller adjusts the duty ratio D of the DC/DC conversion circuit 3 and the charger in the same direction at the same time to achieve the optimal charging and also make the The discharged battery BA is discharged according to the optimal discharge current.
图2为本实施例中稳压滤波电路的电路原理图，图2中，该稳压滤波电路2 包括三极管Q1、稳压二极管D1、整流器D2、第一电阻R1、第二电阻R2、第三泄放电阻R3、第四电阻R4、第五电阻R5、第一电容C1、第二电容C2、第三电容C3、第四电容C4、第五电容C5、第一电感L1、第二共模电感L2和第三共模电感L3，第一电阻R1的一端和第四电阻R4的一端均连接电压输入端 VIN的正极连接，第四电阻R4的另一端与三极管Q1的集电极连接，三极管Q1 的基极与第五电容C5的一端连接，第五电容C5的另一端分别与第一电阻R1 的另一端、稳压二极管D1的负极和第一电容C1的一端连接，稳压二极管D1 的正极和第一电容C1的另一端均连接电压输入端VIN的负极。Fig. 2 is the circuit schematic diagram of the voltage stabilizing filter circuit in this embodiment, in Fig. 2, this voltage stabilizing filtering circuit 2 comprises triode Q1, voltage stabilizing diode D1, rectifier D2, first resistance R1, second resistance R2, third Bleeding resistor R3, fourth resistor R4, fifth resistor R5, first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, fifth capacitor C5, first inductor L1, second common mode inductor L2 and the third common mode inductor L3, one end of the first resistor R1 and one end of the fourth resistor R4 are both connected to the positive pole of the voltage input terminal VIN, the other end of the fourth resistor R4 is connected to the collector of the transistor Q1, and the transistor Q1 The base is connected to one end of the fifth capacitor C5, and the other end of the fifth capacitor C5 is respectively connected to the other end of the first resistor R1, the negative pole of the Zener diode D1 and one end of the first capacitor C1, and the positive pole of the Zener diode D1 and The other end of the first capacitor C1 is connected to the negative pole of the voltage input terminal VIN.
三极管Q1的发射极分别与第三泄放电阻R3的一端和第二电容C2的一端连接，第三泄放电阻R3的另一端和第二电容C2的另一端均与电压输入端VIN 的负极连接，第三共模电感L3的一端与第二电容C2与第三电容的一端连接，第二共模电感L2的另一端与第三电容C3的另一端连接，整流器D2的交流输入端的正极AC+与第三电容C3的一端连接，整流器D2的交流输入端的负极 AC-与第三电容C3的另一端连接，整流器D2的直流输出端的正极V+分别与第一电感L1的一端和第二电阻R2的一端连接，第一电感L1的另一端和第二电阻 R2的另一端均与第四电容C4的一端连接，第四电容C4的另一端接地，整流器 D2的直流输出端的负极V-接地。The emitter of the transistor Q1 is respectively connected to one end of the third bleeder resistor R3 and one end of the second capacitor C2, and the other end of the third bleeder resistor R3 and the other end of the second capacitor C2 are both connected to the negative pole of the voltage input terminal VIN , one end of the third common mode inductor L3 is connected to the second capacitor C2 and one end of the third capacitor, the other end of the second common mode inductor L2 is connected to the other end of the third capacitor C3, and the positive pole AC+ of the AC input end of the rectifier D2 is connected to One end of the third capacitor C3 is connected, the negative pole AC- of the AC input terminal of the rectifier D2 is connected to the other end of the third capacitor C3, and the positive pole V+ of the DC output terminal of the rectifier D2 is respectively connected to one end of the first inductor L1 and one end of the second resistor R2 The other end of the first inductor L1 and the other end of the second resistor R2 are both connected to one end of the fourth capacitor C4, the other end of the fourth capacitor C4 is grounded, and the negative pole V- of the DC output end of the rectifier D2 is grounded.
第四电阻R4和第五电阻R5均为限流电阻，其中，第四电阻R4用于对三极管Q1的集电极所在的支路进行过流保护，第五电阻R5用于对三极管Q1的发射极所在的支路进行过流保护，第五电容C5为耦合电容，用于防止三极管 Q1和稳压二极管D1之间的干扰，所以电路的安全性和可靠性较高。Both the fourth resistor R4 and the fifth resistor R5 are current limiting resistors, wherein the fourth resistor R4 is used for overcurrent protection of the branch where the collector of the triode Q1 is located, and the fifth resistor R5 is used for protecting the emitter of the triode Q1 The branch where it is located is protected against overcurrent, and the fifth capacitor C5 is a coupling capacitor, which is used to prevent interference between the triode Q1 and the Zener diode D1, so the safety and reliability of the circuit are relatively high.
本实施例中，该稳压滤波电路2还包括第六电阻R6，第六电阻R6的一端与第一电阻R1的另一端连接，第六电阻R6的另一端与第五电容C5的另一端连接。第六电阻R6为限流电阻，用于对第一电阻R1所在的支路进行过流保护，以进一步增强电路的安全性和可靠性。In this embodiment, the voltage stabilizing filter circuit 2 further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the other end of the first resistor R1, and the other end of the sixth resistor R6 is connected to the other end of the fifth capacitor C5 . The sixth resistor R6 is a current limiting resistor, which is used for overcurrent protection of the branch where the first resistor R1 is located, so as to further enhance the safety and reliability of the circuit.
本实施例中，该稳压滤波电路2还包括第七电阻R7，第七电阻R7的一端与第五电容C5的另一端连接，第七电阻R7的另一端与第一电容C1的一端连接。第七电阻R7为限流电阻，用于对第一电容C1所在的支路进行过流保护，以更进一步增强电路的安全性和可靠性。In this embodiment, the voltage stabilizing filter circuit 2 further includes a seventh resistor R7, one end of the seventh resistor R7 is connected to the other end of the fifth capacitor C5, and the other end of the seventh resistor R7 is connected to one end of the first capacitor C1. The seventh resistor R7 is a current limiting resistor, which is used for overcurrent protection of the branch where the first capacitor C1 is located, so as to further enhance the safety and reliability of the circuit.
本实施例中，该稳压滤波电路2还包括第八电阻R8，第八电阻R8的一端与第三泄放电阻R3的一端连接，第八电阻R8的另一端与第二电容C2的一端连接。第八电阻R8为限流电阻，用于对第三泄放电阻R3和第二电容C2之间的支路进行过流保护。In this embodiment, the voltage stabilizing filter circuit 2 further includes an eighth resistor R8, one end of the eighth resistor R8 is connected to one end of the third discharge resistor R3, and the other end of the eighth resistor R8 is connected to one end of the second capacitor C2 . The eighth resistor R8 is a current limiting resistor, and is used for overcurrent protection of the branch between the third bleeder resistor R3 and the second capacitor C2.
本实施例中，该稳压滤波电路2还包括第九电阻R9，第九电阻R9的一端与第三电容C3的一端连接，第九电阻R9的另一端与整流器D2的交流输入端的正极AC+连接。第九电阻R9为限流电阻，用于对整流器D2的交流输入端的正极AC+所在的支路进行过流保护。In this embodiment, the voltage stabilizing filter circuit 2 further includes a ninth resistor R9, one end of the ninth resistor R9 is connected to one end of the third capacitor C3, and the other end of the ninth resistor R9 is connected to the positive pole AC+ of the AC input end of the rectifier D2 . The ninth resistor R9 is a current limiting resistor, and is used for overcurrent protection of the branch where the positive pole AC+ of the AC input terminal of the rectifier D2 is located.
本实施例中，该稳压滤波电路2还包括第十电阻R10，第十电阻R10的一端与整流器D2的直流输出端的正极V+连接，第十电阻R10的另一端与第一电感L1的一端连接。第十电阻R10为限流电阻，用于对整流器D2的直流输出端的正极V+所在的支路进行过流保护。In this embodiment, the voltage stabilizing filter circuit 2 further includes a tenth resistor R10, one end of the tenth resistor R10 is connected to the positive pole V+ of the DC output terminal of the rectifier D2, and the other end of the tenth resistor R10 is connected to one end of the first inductor L1 . The tenth resistor R10 is a current limiting resistor, which is used for overcurrent protection of the branch where the positive pole V+ of the DC output terminal of the rectifier D2 is located.
总之，在本实施例中，由于稳压滤波电路2中设有限流电阻和耦合电容，所以电路的安全性和可靠性较高。In a word, in this embodiment, since the voltage stabilizing filter circuit 2 is provided with a current-limiting resistor and a coupling capacitor, the safety and reliability of the circuit are relatively high.
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.
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