CN211351812U - A power module control circuit - Google Patents
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- CN211351812U CN211351812U CN201922359007.3U CN201922359007U CN211351812U CN 211351812 U CN211351812 U CN 211351812U CN 201922359007 U CN201922359007 U CN 201922359007U CN 211351812 U CN211351812 U CN 211351812U
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- Y02B10/00—Integration of renewable energy sources in buildings
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- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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Abstract
本实用新型公开了一种电源模块控制电路，包括依次连接的光伏充电单元、电源切换单元和降压稳压单元，所述的光伏充电单元用于向备用电源充电，所述的电源切换单元用于切换外部供电与备用电源供电，所述的降压稳压单元用于对稳定的直流电进行降压和直流滤波，得到降压后的直流电，在主电源发生断电时，电源模块依然可以依靠备用电源继续工作，降低了故障率，有效保证了能耗数据采集的完整性，增加了系统运行的可靠性和稳定性，本实用新型还具有结构简单，成本低廉，损耗小且易于控制的特点，应用范围广泛。
The utility model discloses a power module control circuit, comprising a photovoltaic charging unit, a power switching unit and a step-down voltage-stabilizing unit which are connected in sequence. The photovoltaic charging unit is used for charging a backup power supply, and the power switching unit is used for In order to switch the external power supply and the backup power supply, the step-down voltage regulator unit is used to step down and filter the stable DC power to obtain the DC power after the step-down. When the main power supply is cut off, the power module can still rely on The backup power supply continues to work, reducing the failure rate, effectively ensuring the integrity of energy consumption data collection, and increasing the reliability and stability of system operation. The utility model also has the characteristics of simple structure, low cost, small loss and easy control. , a wide range of applications.
Description
技术领域technical field
本实用新型属于电源技术领域，具体涉及一种电源模块控制电路。The utility model belongs to the technical field of power supply, in particular to a control circuit of a power supply module.
背景技术Background technique
随着建筑行业的不断发展，对建筑能耗监测系统的需求不断提高，传统的建筑能耗监测系统所采用的供电方案，通常只配备一个供电电源，如果电源出现问题而无法正常工作，整个能耗采集系统就会发生瘫痪，导致能耗数据丢失或者无法上传，影响了建筑能耗监测系统的正常工作，因此，现有技术存在电源可靠性不高的问题。With the continuous development of the construction industry, the demand for building energy consumption monitoring systems continues to increase. The power supply scheme adopted by traditional building energy consumption monitoring systems is usually equipped with only one power supply. If the power supply fails and cannot work normally, the entire energy The energy consumption acquisition system will be paralyzed, resulting in loss of energy consumption data or failure to upload, which affects the normal operation of the building energy consumption monitoring system. Therefore, the existing technology has the problem of low power reliability.
发明内容SUMMARY OF THE INVENTION
针对现有技术中的缺陷和不足，本实用新型的目的是，提供一种建筑能耗监测系统的电源模块控制电路，以解决现有技术中存在的电源可靠性不高的问题。Aiming at the defects and deficiencies in the prior art, the purpose of the present invention is to provide a power module control circuit of a building energy consumption monitoring system to solve the problem of low power reliability in the prior art.
为了实现上述任务，本实用新型采用以下技术方案：In order to realize the above-mentioned tasks, the utility model adopts the following technical solutions:
一种电源模块控制电路，包括依次连接的光伏充电单元、电源切换单元和降压稳压单元，所述的光伏充电单元用于向备用电源充电，所述的电源切换单元用于切换外部电压供电与备用电源供电，所述的降压稳压单元用于对稳定的直流电进行降压和直流滤波，得到降压后的直流电。A power module control circuit, comprising a photovoltaic charging unit, a power switching unit and a step-down voltage-stabilizing unit connected in sequence, the photovoltaic charging unit is used for charging a backup power source, and the power switching unit is used for switching an external voltage for power supply Powered by a backup power supply, the step-down voltage-stabilizing unit is used for step-down and DC filtering of the stable DC power to obtain the step-down DC power.
进一步地，所述的光伏充电单元包括光伏阵列板U2、升压芯片U1、电阻R1、电阻R2、电阻R3、电阻R4、电容C1、电容C2和二极管D1；Further, the photovoltaic charging unit includes a photovoltaic array panel U2, a booster chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and a diode D1;
其中，升压芯片U1的ISWC引脚分别与二极管D1的阳极和电感L1的一端连接，电感L1的另一端通过电阻R1与与升压芯片的IDC引脚相连、二极管D1的阴极与电容C2相连，升压芯片U1的IPK引脚分别与电阻R1的一端和电阻R2的一端相连，电阻R2的另一端分别与升压芯片U1的VCC引脚、电容C3的一端和光伏阵列板U2的VCC引脚相连，升压芯片U1的COMP引脚分别连接电阻R4的一端和电阻R3的一端，升压芯片U1的ISWE引脚与升压芯片U1的GND引脚相连，升压芯片U1的TCAP引脚与电容C1相连，电容C1、电容C2、电容C3、电阻R4、升压芯片U1的ISWE引脚、升压芯片U1的GND引脚、光伏阵列板U2的GND引脚还分别与地相连。Among them, the ISWC pin of the boost chip U1 is respectively connected to the anode of the diode D1 and one end of the inductor L1, the other end of the inductor L1 is connected to the IDC pin of the boost chip through the resistor R1, and the cathode of the diode D1 is connected to the capacitor C2. , the IPK pin of the boost chip U1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively, and the other end of the resistor R2 is respectively connected to the VCC pin of the boost chip U1, one end of the capacitor C3 and the VCC lead of the photovoltaic array board U2. The COMP pin of the boost chip U1 is connected to one end of the resistor R4 and one end of the resistor R3 respectively, the ISWE pin of the boost chip U1 is connected to the GND pin of the boost chip U1, and the TCAP pin of the boost chip U1 Connected to capacitor C1, capacitor C1, capacitor C2, capacitor C3, resistor R4, ISWE pin of boost chip U1, GND pin of boost chip U1, and GND pin of photovoltaic array board U2 are also connected to ground respectively.
进一步地，所述的电源切换单元包括MOS管Q2、电阻R5、电阻R7、电容C4、电池BAT1和二极管D2；Further, the power switching unit includes a MOS transistor Q2, a resistor R5, a resistor R7, a capacitor C4, a battery BAT1 and a diode D2;
其中，电池BAT1与电容C4并联，电池BAT1与电容C4的公共端与电阻R7的一端相连，电池BAT1与电容C4的另一公共端与所述的电容C2相连，电阻R7的另一端与MOS管Q2的源级相连，MOS管Q2的栅级分别与电阻R5、12V电压的引脚J1和稳压二极管D2的阳极相连，稳压二极管D2的阴极与MOS管Q2的漏级相连，电池BAT1、电容C4和电阻R5均与地相连。The battery BAT1 is connected in parallel with the capacitor C4, the common terminal of the battery BAT1 and the capacitor C4 is connected to one end of the resistor R7, the other common terminal of the battery BAT1 and the capacitor C4 is connected to the capacitor C2, and the other end of the resistor R7 is connected to the MOS tube The source of Q2 is connected, the gate of MOS transistor Q2 is connected to resistor R5, pin J1 of 12V voltage and the anode of Zener diode D2, the cathode of Zener diode D2 is connected to the drain of MOS transistor Q2, battery BAT1, Capacitor C4 and resistor R5 are both connected to ground.
进一步地，所述的降压稳压单元包括MOS管Q1、稳压二极管D3、电阻R6、电容C5、电容C6和电容C7；Further, the step-down voltage-stabilizing unit includes a MOS transistor Q1, a voltage-stabilizing diode D3, a resistor R6, a capacitor C5, a capacitor C6 and a capacitor C7;
其中，MOS管Q1的基级分别与稳压二极管D3的阴极和电阻R6的一端相连，MOS管的集电极分别与电阻R6的另一端和电容C6的一端相连，电容C6的另一端与所述的稳压二极管D2的阴极相连，MOS管的发射级分别连接电容C7和电容C5，电容C6、二极管D3、电容C7以及电容C5还与地相连。The base stage of the MOS tube Q1 is connected to the cathode of the Zener diode D3 and one end of the resistor R6 respectively, the collector of the MOS tube is respectively connected to the other end of the resistor R6 and one end of the capacitor C6, and the other end of the capacitor C6 is connected to the The cathode of the zener diode D2 is connected, the emitter stage of the MOS tube is connected to the capacitor C7 and the capacitor C5 respectively, the capacitor C6, the diode D3, the capacitor C7 and the capacitor C5 are also connected to the ground.
进一步地，所述的升压芯片的型号为MC34063。Further, the model of the boost chip is MC34063.
进一步地，所述的MOS管Q2的型号为S9013。Further, the model of the MOS transistor Q2 is S9013.
进一步地，所述的MOS管Q1的型号为IRF9530N。Further, the model of the MOS transistor Q1 is IRF9530N.
与现有的建筑能耗监测系统的电源模块相比，本实用新型具有以下技术特点：Compared with the power supply module of the existing building energy consumption monitoring system, the utility model has the following technical features:
(1)本实用新型设置了电源切换电路，在主电源发生断电时，电源模块依然可以依靠备用电源继续工作，降低了故障率，有效保证了能耗数据采集的完整性，增加了系统运行的可靠性和稳定性。(1) The utility model is provided with a power supply switching circuit. When the main power supply is powered off, the power supply module can still rely on the standby power supply to continue to work, which reduces the failure rate, effectively ensures the integrity of energy consumption data collection, and increases system operation. reliability and stability.
(2)本实用新型为电源模块设置了光伏充电功能，有效利用光源能量，延长备用电池的使用周期，节省了维护成本，同时，电源模块设置了电源切换电路，在主电源掉电时，依然可以依靠备用电源继续工作，降低了故障率。(2) The utility model is provided with a photovoltaic charging function for the power supply module, which effectively utilizes the energy of the light source, prolongs the service cycle of the backup battery, and saves maintenance costs. It can continue to work on the backup power supply, reducing the failure rate.
(3)本实用新型还具有结构简单，成本低廉，损耗小且易于控制的特点(3) The utility model also has the characteristics of simple structure, low cost, small loss and easy control
附图说明Description of drawings
图1为本实用新型的电路原理图。Fig. 1 is the circuit principle diagram of the utility model.
图2为建筑能耗监测和计算系统结构示意图。Figure 2 is a schematic structural diagram of a building energy consumption monitoring and calculation system.
下面结合附图对本实用新型作进一步详细的说明。The present utility model will be described in further detail below in conjunction with the accompanying drawings.
具体实施方式Detailed ways
遵从上述技术方案，如图1至图2所示，本实用新型提供了一种电源模块控制电路，包括依次连接的光伏充电单元1、电源切换单元2和降压稳压单元3，所述的光伏充电单元1用于向备用电源充电，所述的电源切换单元2用于切换外部电压供电与备用电源供电，所述的降压稳压单元3用于对稳定的直流电进行降压和直流滤波，得到降压后的直流电。Following the above technical solutions, as shown in FIGS. 1 to 2 , the present invention provides a power module control circuit, which includes a
光伏充电单元包括光伏阵列板U2、升压芯片U1、电阻R1、电阻R2、电阻R3、电阻R4、电容C1、电容C2和二极管D1；The photovoltaic charging unit includes a photovoltaic array panel U2, a booster chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and a diode D1;
其中，升压芯片U1的ISWC引脚分别与二极管D1的阳极和电感L1的一端连接，电感L1的另一端通过电阻R1与与升压芯片的IDC引脚相连、二极管D1的阴极与电容C2相连，升压芯片U1的IPK引脚分别与电阻R1的一端和电阻R2的一端相连，电阻R2的另一端分别与升压芯片U1的VCC引脚、电容C3的一端和光伏阵列板U2的VCC引脚相连，升压芯片U1的COMP引脚分别连接电阻R4的一端和电阻R3的一端，升压芯片U1的ISWE引脚与升压芯片U1的GND引脚相连，升压芯片U1的TCAP引脚与电容C1相连，电容C1、电容C2、电容C3、电阻R4、升压芯片U1的ISWE引脚、升压芯片U1的GND引脚、光伏阵列板U2的GND引脚还分别与地相连。Among them, the ISWC pin of the boost chip U1 is respectively connected to the anode of the diode D1 and one end of the inductor L1, the other end of the inductor L1 is connected to the IDC pin of the boost chip through the resistor R1, and the cathode of the diode D1 is connected to the capacitor C2. , the IPK pin of the boost chip U1 is connected to one end of the resistor R1 and one end of the resistor R2 respectively, and the other end of the resistor R2 is respectively connected to the VCC pin of the boost chip U1, one end of the capacitor C3 and the VCC lead of the photovoltaic array board U2. The COMP pin of the boost chip U1 is connected to one end of the resistor R4 and one end of the resistor R3 respectively, the ISWE pin of the boost chip U1 is connected to the GND pin of the boost chip U1, and the TCAP pin of the boost chip U1 Connected to capacitor C1, capacitor C1, capacitor C2, capacitor C3, resistor R4, ISWE pin of boost chip U1, GND pin of boost chip U1, and GND pin of photovoltaic array board U2 are also connected to ground respectively.
升压芯片U1的ISWC引脚为开关管集电极接口；ISWE引脚为开关管发射极接口，TCAP引脚为定时电容接GND引脚为接地端；COMP引脚为比较器反相输入端、输出电压取样端；VCC引脚为电源Vcc接口；IPK引脚为IPK检测即负载峰值电流取样端；IDC引脚为驱动管集电极接口。The ISWC pin of the boost chip U1 is the collector interface of the switch tube; the ISWE pin is the emitter interface of the switch tube, the TCAP pin is the timing capacitor and the GND pin is the ground terminal; the COMP pin is the comparator inverting input terminal, The output voltage sampling terminal; the VCC pin is the power supply Vcc interface; the IPK pin is the IPK detection, that is, the load peak current sampling terminal; the IDC pin is the collector interface of the drive tube.
电源切换单元包括MOS管Q2、电阻R5、电阻R7、电容C4、电池BAT1和二极管D2；The power switching unit includes a MOS transistor Q2, a resistor R5, a resistor R7, a capacitor C4, a battery BAT1 and a diode D2;
其中，电池BAT1与电容C4并联，电池BAT1与电容C4的公共端与电阻R7的一端相连，电池BAT1与电容C4的另一公共端与所述的电容C2相连，电阻R7的另一端与MOS管Q2的源级相连，MOS管Q2的栅级分别与电阻R5、12V电压的引脚J1和稳压二极管D2的阳极相连，稳压二极管D2的阴极与MOS管Q2的漏级相连，电池BAT1、电容C4和电阻R5均与地相连。The battery BAT1 is connected in parallel with the capacitor C4, the common terminal of the battery BAT1 and the capacitor C4 is connected to one end of the resistor R7, the other common terminal of the battery BAT1 and the capacitor C4 is connected to the capacitor C2, and the other end of the resistor R7 is connected to the MOS tube The source of Q2 is connected, the gate of MOS transistor Q2 is connected to resistor R5, pin J1 of 12V voltage and the anode of Zener diode D2, the cathode of Zener diode D2 is connected to the drain of MOS transistor Q2, battery BAT1, Capacitor C4 and resistor R5 are both connected to ground.
降压稳压单元包括MOS管Q1、稳压二极管D3、电阻R6、电容C5、电容C6和电容C7；The step-down voltage regulator unit includes MOS tube Q1, Zener diode D3, resistor R6, capacitor C5, capacitor C6 and capacitor C7;
其中，MOS管Q1的基级分别与稳压二极管D3的阴极和电阻R6的一端相连，MOS管的集电极分别与电阻R6的另一端和电容C6的一端相连，电容C6的另一端与所述的稳压二极管D2的阴极相连，MOS管的发射级分别连接电容C7和电容C5，电容C6、二极管D3、电容C7以及电容C5还与地相连。The base stage of the MOS tube Q1 is connected to the cathode of the Zener diode D3 and one end of the resistor R6 respectively, the collector of the MOS tube is respectively connected to the other end of the resistor R6 and one end of the capacitor C6, and the other end of the capacitor C6 is connected to the The cathode of the zener diode D2 is connected, the emitter stage of the MOS tube is connected to the capacitor C7 and the capacitor C5 respectively, the capacitor C6, the diode D3, the capacitor C7 and the capacitor C5 are also connected to the ground.
升压芯片的型号为MC34063。The model of the boost chip is MC34063.
MOS管Q2的型号为S9013。The model of the MOS transistor Q2 is S9013.
MOS管Q1的型号为IRF9530N。The model of the MOS transistor Q1 is IRF9530N.
实施例1Example 1
将本实用新型应用于图2所示的建筑能耗监测和计算系统，所述的建筑能耗监测和计算系统系统包括光伏板、电源模块和建筑能耗监测与计算控制模块，其中，光伏板用于为电源模块提供电能；电源模块用于将光伏板接入的直流电转换为稳定的直流电，再将稳定的直流电供给所述的建筑能耗监测与计算控制模块；建筑能耗监测与计算模块用于监测和计算建筑能耗。The utility model is applied to the building energy consumption monitoring and calculation system shown in FIG. 2 , the building energy consumption monitoring and calculation system system includes photovoltaic panels, power modules and building energy consumption monitoring and calculation control modules, wherein the photovoltaic panels It is used to provide electrical energy for the power module; the power module is used to convert the DC power connected to the photovoltaic panel into a stable DC power, and then supply the stable DC power to the building energy consumption monitoring and calculation control module; the building energy consumption monitoring and calculation module Used to monitor and calculate building energy consumption.
在图2所示的系统中，光伏板选用8V200mA光伏板，处理器采用ARM Contex M3处理器，WIFI模块使用ESP8266，并与1DB的增益天线相连，用于接收其他室内监测设备发送的温度、湿度、流量、照度等能耗数据。以太网模块使用DM9051并拓展一路RJ45接口，用于本装置组成模块之间的通信，电压采集模块用于采集外部检测电压，使用AD637芯片。电平转换模块使用MAX485电平转换芯片，并扩展3路RS485接口，用于采集智能电表、智能气表等具有RS485接口通信的传感器或检测设备。存储器使用8GB的TF内存卡，用于存储设备自身状态信息和控制算法。拓展接口包括3路DI，3路DO，2路AO以及4路模数转换(AD)接口，用于连接控制设备或者拓展传感器，采集数据等。电源模块接受来自光伏板和外部电源接口的电源供给，向装置内部其他功能模块提供稳定的电压。In the system shown in Figure 2, the photovoltaic panel uses 8V200mA photovoltaic panel, the processor uses ARM Contex M3 processor, the WIFI module uses ESP8266, and is connected to the 1DB gain antenna to receive the temperature and humidity sent by other indoor monitoring equipment. , flow, illumination and other energy consumption data. The Ethernet module uses DM9051 and expands one RJ45 interface, which is used for communication between the modules of the device. The voltage acquisition module is used to collect external detection voltage and uses AD637 chip. The level conversion module uses the MAX485 level conversion chip and expands 3-way RS485 interfaces, which are used to collect sensors or detection equipment with RS485 interface communication such as smart electricity meters and smart gas meters. The memory uses an 8GB TF memory card, which is used to store the device's own state information and control algorithms. The expansion interface includes 3-way DI, 3-way DO, 2-way AO and 4-way analog-to-digital conversion (AD) interface, which is used to connect control equipment or expand sensors, collect data, etc. The power module accepts the power supply from the photovoltaic panel and the external power interface, and provides a stable voltage to other functional modules inside the device.
在本实施例中，R1选用180Ω的R0805型电阻，R2选用0.22Ω的R0805型电阻，R3选用11K的R0805型电阻，R4选用1K的R0805型电阻，R5选用100K的R0805型电阻，R6选用22K的R0805型电阻，R7选用10K的R0805型电阻。In this embodiment, R1 selects a 180Ω R0805 resistor, R2 selects a 0.22Ω R0805 resistor, R3 selects a 11K R0805 resistor, R4 selects a 1K R0805 resistor, R5 selects a 100K R0805 resistor, and R6 selects a 22K resistor R0805 type resistor, R7 selects 10K R0805 type resistor.
D1选用ER102型二极管，D2选用SR560型二极管、D3选用SS12型二极管。D1 selects the ER102 diode for use, D2 selects the SR560 diode for use, and D3 selects the SS12 diode for use.
C1选用1500pF电容，C2选用160uF电容，C3选用120uF电容，C4选用0.1uf电容，C5选用0.1uf电容、C6选用10uF电容，C7选用10uF电容。C1 selects a 1500pF capacitor, C2 selects a 160uF capacitor, C3 selects a 120uF capacitor, C4 selects a 0.1uf capacitor, C5 selects a 0.1uf capacitor, C6 selects a 10uF capacitor, and C7 selects a 10uF capacitor.
Q1选用IRF9530N型NMOS管，Q2选用S9013型MOS管。Q1 selects IRF9530N type NMOS tube, Q2 selects S9013 type MOS tube.
BAT1选用额定电压12V的锂电池。电感L1选用120uH的电感。BAT1 selects a lithium battery with a rated voltage of 12V. Inductor L1 selects an inductance of 120uH.
本实用新型的工作原理如下：The working principle of the present utility model is as follows:
光伏充电单元：当MC34063型升压芯片U1内部的开关管T1导通时，光伏板输出的电压经电阻R2、电感L1以及MC34063的1脚接地，电感L1开始存储能量，由电容C1两端连续的电压为负载提供电压。当T1断开时，电源和电感同时为负载和电容C1提供电压。电感在释放能量期间，由于其两端的电动势极性与电源极性相同，相当于两个电源串联，因而负载上得到的电压高于电源电压。开关管T1导通与关断的频率就是MC34063升压芯片U1的工作频率。只要外部负载不超过MC34063升压芯片的额定负载，就可以获得连续的12V的直流电压，与BAT1并联的电容C4起滤波作用。Photovoltaic charging unit: When the switch tube T1 inside the MC34063 booster chip U1 is turned on, the voltage output by the photovoltaic panel is grounded through the resistor R2, the inductor L1 and the 1 pin of the MC34063, and the inductor L1 starts to store energy, which is continuously connected by the two ends of the capacitor C1. supply voltage to the load. When T1 is turned off, the power supply and inductor supply voltage to the load and capacitor C1 at the same time. When the inductor releases energy, since the polarity of the electromotive force at both ends is the same as that of the power supply, it is equivalent to two power supplies in series, so the voltage obtained on the load is higher than the power supply voltage. The frequency at which the switch tube T1 is turned on and off is the operating frequency of the MC34063 boost chip U1. As long as the external load does not exceed the rated load of the MC34063 booster chip, a continuous 12V DC voltage can be obtained, and the capacitor C4 in parallel with BAT1 acts as a filter.
电源切换单元：当采用外部电源供电时，MOS管Q1的基极与射极的电压差为0，MOS管Q1关闭，电压经二极管D2向降压电路供电。在外部电源断电时，Q1的基极电压为0，此时Q1的基极与射极的电压差大于0.6V，MOS管Q1导通，由锂电池向降压电路供电。Power switching unit: When the external power supply is used, the voltage difference between the base and the emitter of the MOS transistor Q1 is 0, the MOS transistor Q1 is turned off, and the voltage is supplied to the step-down circuit through the diode D2. When the external power supply is powered off, the base voltage of Q1 is 0. At this time, the voltage difference between the base and the emitter of Q1 is greater than 0.6V, the MOS transistor Q1 is turned on, and the lithium battery supplies power to the step-down circuit.
降压电路单元：输入电压或者备用输入电压经过电阻R4和二极管D3形成回路，所以降压MOS管Q2的基极与射极之间产生电压差，降压MOS管Q2导通，电容C7进行储能，同时滤除低频干扰，电容C5滤除高频干扰，输出稳定的5V电压，将这个5V电压供给CPN节点中的存储器和处理器使用，而12V的电压给其他部分使用。Step-down circuit unit: The input voltage or the backup input voltage forms a loop through the resistor R4 and the diode D3, so a voltage difference is generated between the base and the emitter of the step-down MOS transistor Q2, the step-down MOS transistor Q2 is turned on, and the capacitor C7 is stored. Capacitor C5 filters out high-frequency interference, outputs a stable 5V voltage, and supplies this 5V voltage to the memory and processor in the CPN node, while the 12V voltage is used by other parts.
本实用新型电连接信号的传输过程如下：The transmission process of the electrical connection signal of the present invention is as follows:
光伏充电单元将光伏板提供的电压经过电压转化芯片U1及其外围电路处理，变成12V的直流电流入锂电池，为锂电池充电，锂电池电流经由电阻R7和三极管Q1进入降压稳压单元，外部电源电流经由二极管D2进入降压稳压单元，电源切换单元主要利用MOS管Q1的开断特性实现电源切换功能。12V直流电进入降压稳压单元后，经电阻R4和稳压管D3在三极管Q2的基极形成5.6V左右电压，此时三极管Q2导通，电流经三极管Q2流向外部负载。The photovoltaic charging unit processes the voltage provided by the photovoltaic panel through the voltage conversion chip U1 and its peripheral circuits, and turns it into a 12V DC current into the lithium battery to charge the lithium battery. The lithium battery current enters the step-down voltage regulator unit through the resistor R7 and the transistor Q1. The external power supply current enters the step-down voltage regulator unit through the diode D2, and the power supply switching unit mainly uses the on-off characteristic of the MOS transistor Q1 to realize the power supply switching function. After the 12V DC power enters the step-down voltage regulator unit, a voltage of about 5.6V is formed at the base of the transistor Q2 through the resistor R4 and the voltage regulator tube D3. At this time, the transistor Q2 is turned on, and the current flows to the external load through the transistor Q2.
以上所述的具体实施例，仅对本实用新型的目的、技术方案和有益效果进行进一步详细说明，以上所述仅为本实用新型的具体实施例而已，并不用于限制本实用新型，凡在本实用新型的基本原理之内，所做的任何修改、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 specific embodiments described above are only further detailed descriptions of the purpose, technical solutions and beneficial effects of the present utility model. The above are only specific embodiments of the present utility model, and are not intended to limit the present utility model. Within the basic principle of the utility model, any modification, equivalent replacement, improvement, etc. made should be included within the protection scope of the present utility model.
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