CN104901280B - A kind of intelligent protection circuit - Google Patents
A kind of intelligent protection circuit Download PDFInfo
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- CN104901280B CN104901280B CN201510311685.6A CN201510311685A CN104901280B CN 104901280 B CN104901280 B CN 104901280B CN 201510311685 A CN201510311685 A CN 201510311685A CN 104901280 B CN104901280 B CN 104901280B
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Abstract
本发明公开了一种智能保护电路，包括变压器W、芯片IC1、电阻R1和二极管D1，所述变压器W的绕组N1的一端连接电容C4、双向晶闸管Q1的一个主电极和220V交流电，变压器W的绕组N1的另一端连接负载RL，变压器W的绕组N2的两端分别连接整流桥T的第一端口和整流桥T的第三端口。本发明智能保护电路不仅结构简单、元器件少、制作成本低，而且电路还具有过压保护、欠压保护和软启动的功能，有效的防止了电网波动对用电负载的影响，因此电路具有功能多样、使用寿命长和简单实用的优点。
The invention discloses an intelligent protection circuit, which includes a transformer W, a chip IC1, a resistor R1 and a diode D1. One end of the winding N1 of the transformer W is connected to a capacitor C4, a main electrode of a bidirectional thyristor Q1 and 220V alternating current. The other end of the winding N1 is connected to the load RL, and the two ends of the winding N2 of the transformer W are respectively connected to the first port of the rectifier bridge T and the third port of the rectifier bridge T. The intelligent protection circuit of the present invention not only has simple structure, few components and parts, and low production cost, but also has the functions of overvoltage protection, undervoltage protection and soft start, which effectively prevents the influence of power grid fluctuations on electric loads, so the circuit has It has the advantages of various functions, long service life and simplicity and practicality.
Description
技术领域technical field
本发明涉及一种保护电路，具体是一种智能保护电路。The invention relates to a protection circuit, in particular to an intelligent protection circuit.
背景技术Background technique
随着人们生活水平的提高，各种家用电器逐渐进入人们的家庭，可以是说电能已经成为人们生活中最常用的能源，但是电能在电网中传输的过程中经常会出现电网波动，从而使得原本稳定的220V电压会出现过压、欠压的情况，不仅影响人们的正常生产生活，而且还会严重降低用电负载的使用寿命。With the improvement of people's living standards, various household appliances have gradually entered people's families. It can be said that electric energy has become the most commonly used energy source in people's lives. The stable 220V voltage will cause overvoltage and undervoltage, which not only affects people's normal production and life, but also seriously reduces the service life of electrical loads.
发明内容Contents of the invention
本发明的目的在于提供一种结构简单、功能多样的智能保护电路，以解决上述背景技术中提出的问题。The object of the present invention is to provide an intelligent protection circuit with simple structure and various functions, so as to solve the problems raised in the above-mentioned background technology.
为实现上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种智能保护电路，包括变压器W、芯片IC1、电阻R1和二极管D1，所述变压器W的绕组N1的一端连接电容C4、双向晶闸管Q1的一个主电极和220V交流电，变压器W的绕组N1的另一端连接负载RL，变压器W的绕组N2的两端分别连接整流桥T的第一端口和整流桥T的第三端口，整流桥T的第二端口连接电阻R1、电阻R2、电阻R3、电阻R8、电容C1、芯片IC1的引脚4、芯片IC1的引脚8和芯片IC2的引脚1，电阻R1的另一端连接二极管D1的阳极，二极管D1的阴极连接电容C1的另一端、电容C3、电容C5、电容C6、电阻R5、电阻R6、电阻R7、电阻R10、二极管D2的阳极、整流桥T的第四端口、芯片IC1的引脚1和芯片IC2的引脚4，电阻R2的另一端连接电阻R4、电阻R5的另一端和芯片IC1的引脚6，电阻R3的另一端连接电阻R4的另一端、电阻R6的另一端和芯片IC1的引脚2，芯片IC1的引脚5连接电容C6的另一端，芯片IC1的引脚3连接电容C2，电容C2的另一端连接电阻R7的另一端、电容C3的另一端、二极管D2的阴极和二极管D3的阴极，二极管D3的阳极连接芯片IC2的引脚5，电阻R8的另一端连接电容C5的另一端，芯片IC2的引脚2连接电阻R9，电阻R9的另一端连接二极管D4的阳极，二极管D4的阴极连接双向晶闸管Q1的控制极，电容C1的另一端连接电阻R10的另一端，双向晶闸管Q1的另一个主电极连接负载RL的另一端。An intelligent protection circuit includes a transformer W, a chip IC1, a resistor R1 and a diode D1. One end of the winding N1 of the transformer W is connected to a capacitor C4, a main electrode of a bidirectional thyristor Q1 and 220V alternating current, and the other end of the winding N1 of the transformer W One end is connected to the load RL, and the two ends of the winding N2 of the transformer W are respectively connected to the first port of the rectifier bridge T and the third port of the rectifier bridge T, and the second port of the rectifier bridge T is connected to resistors R1, R2, R3, and R8 , capacitor C1, pin 4 of chip IC1, pin 8 of chip IC1 and pin 1 of chip IC2, the other end of resistor R1 is connected to the anode of diode D1, the cathode of diode D1 is connected to the other end of capacitor C1, capacitor C3, Capacitor C5, capacitor C6, resistor R5, resistor R6, resistor R7, resistor R10, anode of diode D2, fourth port of rectifier bridge T, pin 1 of chip IC1 and pin 4 of chip IC2, the other end of resistor R2 Connect resistor R4, the other end of resistor R5 to pin 6 of chip IC1, the other end of resistor R3 to the other end of resistor R4, the other end of resistor R6 to pin 2 of chip IC1, and pin 5 of chip IC1 to connect the capacitor The other end of C6, pin 3 of chip IC1 is connected to capacitor C2, the other end of capacitor C2 is connected to the other end of resistor R7, the other end of capacitor C3, the cathode of diode D2 and the cathode of diode D3, and the anode of diode D3 is connected to chip IC2 The other end of the resistor R8 is connected to the other end of the capacitor C5, the pin 2 of the chip IC2 is connected to the resistor R9, the other end of the resistor R9 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the control electrode of the triac Q1, The other end of the capacitor C1 is connected to the other end of the resistor R10, and the other main electrode of the bidirectional thyristor Q1 is connected to the other end of the load RL.
作为本发明的优选方案：所述芯片IC1的型号为NE555，芯片IC2的型号为TWH8778。As a preferred solution of the present invention: the model of the chip IC1 is NE555, and the model of the chip IC2 is TWH8778.
作为本发明的优选方案：所述二极管D4为发光二极管。As a preferred solution of the present invention: the diode D4 is a light emitting diode.
与现有技术相比，本发明的有益效果是：本发明智能保护电路不仅结构简单、元器件少、制作成本低，而且电路还具有过压保护、欠压保护和软启动的功能，有效的防止了电网波动对用电负载的影响，因此电路具有功能多样、使用寿命长和简单实用的优点。Compared with the prior art, the beneficial effects of the present invention are: the intelligent protection circuit of the present invention not only has simple structure, few components and parts, and low production cost, but also has the functions of overvoltage protection, undervoltage protection and soft start, effectively The influence of grid fluctuations on electric loads is prevented, so the circuit has the advantages of multiple functions, long service life, simplicity and practicability.
附图说明Description of drawings
图1为智能保护电路的电路图。Figure 1 is a circuit diagram of an intelligent protection circuit.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，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，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
请参阅图1，一种智能保护电路，包括变压器W、芯片IC1、电阻R1和二极管D1，所述变压器W的绕组N1的一端连接电容C4、双向晶闸管Q1的一个主电极和220V交流电，变压器W的绕组N1的另一端连接负载RL，变压器W的绕组N2的两端分别连接整流桥T的第一端口和整流桥T的第三端口，整流桥T的第二端口连接电阻R1、电阻R2、电阻R3、电阻R8、电容C1、芯片IC1的引脚4、芯片IC1的引脚8和芯片IC2的引脚1，电阻R1的另一端连接二极管D1的阳极，二极管D1的阴极连接电容C1的另一端、电容C3、电容C5、电容C6、电阻R5、电阻R6、电阻R7、电阻R10、二极管D2的阳极、整流桥T的第四端口、芯片IC1的引脚1和芯片IC2的引脚4，电阻R2的另一端连接电阻R4、电阻R5的另一端和芯片IC1的引脚6，电阻R3的另一端连接电阻R4的另一端、电阻R6的另一端和芯片IC1的引脚2，芯片IC1的引脚5连接电容C6的另一端，芯片IC1的引脚3连接电容C2，电容C2的另一端连接电阻R7的另一端、电容C3的另一端、二极管D2的阴极和二极管D3的阴极，二极管D3的阳极连接芯片IC2的引脚5，电阻R8的另一端连接电容C5的另一端，芯片IC2的引脚2连接电阻R9，电阻R9的另一端连接二极管D4的阳极，二极管D4的阴极连接双向晶闸管Q1的控制极，电容C1的另一端连接电阻R10的另一端，双向晶闸管Q1的另一个主电极连接负载RL的另一端。Please refer to Fig. 1, a kind of intelligent protection circuit, comprises transformer W, chip IC1, resistor R1 and diode D1, one end of winding N1 of described transformer W is connected capacitor C4, a main electrode of bidirectional thyristor Q1 and 220V alternating current, transformer W The other end of the winding N1 of the transformer W is connected to the load RL, the two ends of the winding N2 of the transformer W are respectively connected to the first port of the rectifier bridge T and the third port of the rectifier bridge T, and the second port of the rectifier bridge T is connected to the resistors R1, R2, Resistor R3, resistor R8, capacitor C1, pin 4 of chip IC1, pin 8 of chip IC1 and pin 1 of chip IC2, the other end of resistor R1 is connected to the anode of diode D1, and the cathode of diode D1 is connected to the other end of capacitor C1 One end, capacitor C3, capacitor C5, capacitor C6, resistor R5, resistor R6, resistor R7, resistor R10, anode of diode D2, fourth port of rectifier bridge T, pin 1 of chip IC1 and pin 4 of chip IC2, The other end of resistor R2 is connected to resistor R4, the other end of resistor R5 and pin 6 of chip IC1, the other end of resistor R3 is connected to the other end of resistor R4, the other end of resistor R6 and pin 2 of chip IC1, and the other end of chip IC1 Pin 5 is connected to the other end of capacitor C6, pin 3 of chip IC1 is connected to capacitor C2, and the other end of capacitor C2 is connected to the other end of resistor R7, the other end of capacitor C3, the cathode of diode D2 and the cathode of diode D3, and the diode D3 The anode of the chip IC2 is connected to pin 5, the other end of the resistor R8 is connected to the other end of the capacitor C5, the pin 2 of the chip IC2 is connected to the resistor R9, the other end of the resistor R9 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the bidirectional thyristor The control electrode of Q1, the other end of the capacitor C1 is connected to the other end of the resistor R10, and the other main electrode of the bidirectional thyristor Q1 is connected to the other end of the load RL.
芯片IC1的型号为NE555，芯片IC2的型号为TWH8778。二极管D4为发光二极管。The model of chip IC1 is NE555, and the model of chip IC2 is TWH8778. Diode D4 is a light emitting diode.
本发明的工作原理是：正常供电时，220V交流电经过变压器W降压、整流桥T整流、电容C1滤波后变成稳定的直流电给保护电路供电，从整流桥T的端第二端口输出的脉动电压与基准电压比较，使得芯片IC1的3脚输出矩形的脉冲电压，此电压使芯片IC2导通输出高电平，经过电阻R9和发光二极管D4后加在双向晶闸管Q1的控制极，二极管D4发光，使得双向晶闸管Q1导通，负载RL得电工作，当电网电压大于250VA或低于170V时，芯片IC1处于保护状态无输出，芯片IC2内部电路断开，双向晶闸管Q1断开电路，负载RL断开，当电网中的电压回复到稳定的电压范围内时，因电容C4已放电完毕，因此需要电容C4充满电后芯片IC2才会导通，因此避免了电路反复开启和关断对负载造成的寿命降低。The working principle of the present invention is: when the power supply is normal, the 220V AC is stepped down by the transformer W, rectified by the rectifier bridge T, filtered by the capacitor C1 and becomes a stable direct current to supply power to the protection circuit, and the pulsation output from the second port of the rectifier bridge T The voltage is compared with the reference voltage, so that pin 3 of the chip IC1 outputs a rectangular pulse voltage. This voltage makes the chip IC2 turn on and output a high level. After passing through the resistor R9 and the light-emitting diode D4, it is added to the control pole of the bidirectional thyristor Q1, and the diode D4 emits light. , so that the bidirectional thyristor Q1 is turned on, and the load RL is energized to work. When the grid voltage is greater than 250VA or lower than 170V, the chip IC1 is in the protection state and has no output, the internal circuit of the chip IC2 is disconnected, the bidirectional thyristor Q1 is disconnected from the circuit, and the load RL is disconnected. On, when the voltage in the power grid returns to a stable voltage range, since the capacitor C4 has been discharged, the chip IC2 will not be turned on until the capacitor C4 is fully charged, thus avoiding the damage to the load caused by the circuit being turned on and off repeatedly Reduced lifespan.
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| CN105163456A (en) * | 2015-09-29 | 2015-12-16 | 黄超发 | Constant-current driving power failure self-delay LED lighting lamp |
| CN106703671A (en) * | 2016-11-29 | 2017-05-24 | 廖婕 | Clean and sanitary electric window |
| CN118449098A (en) * | 2024-04-29 | 2024-08-06 | Oppo广东移动通信有限公司 | DC transformer and electronic equipment |
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| CN204068197U (en) * | 2014-09-17 | 2014-12-31 | 国家电网公司 | The under-voltage overvoltage automatic protection circuit of a kind of civil power |
| CN204243716U (en) * | 2014-09-30 | 2015-04-01 | 国家电网公司 | Electric device fault secure circuit |
| CN104682341A (en) * | 2013-11-28 | 2015-06-03 | 海洋王（东莞）照明科技有限公司 | Over-voltage/low-voltage protective circuit |
| CN204794037U (en) * | 2015-06-09 | 2015-11-18 | 廖婕 | Intelligence protection circuit |
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| US20040070904A1 (en) * | 2002-10-11 | 2004-04-15 | Carr Sheldon P. | Over-voltage protection arrangement for a low voltage power supply |
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| CN104682341A (en) * | 2013-11-28 | 2015-06-03 | 海洋王（东莞）照明科技有限公司 | Over-voltage/low-voltage protective circuit |
| CN204068197U (en) * | 2014-09-17 | 2014-12-31 | 国家电网公司 | The under-voltage overvoltage automatic protection circuit of a kind of civil power |
| CN204243716U (en) * | 2014-09-30 | 2015-04-01 | 国家电网公司 | Electric device fault secure circuit |
| CN204794037U (en) * | 2015-06-09 | 2015-11-18 | 廖婕 | Intelligence protection circuit |
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