Surge suppression circuit

Abstract

The utility model belongs to the field of circuit design, and particularly relates to a surge suppression circuit, which comprises an N line, an L line and a first surge module, the first surge module comprises a first winding resistor, a second winding resistor, a first piezoresistor, a second piezoresistor, a third piezoresistor and a first capacitor; the first end and the second end of the first piezoresistor are electrically connected with the first end of the first winding resistor and the second end of the second winding resistor respectively, and the first end and the second end of the second piezoresistor are electrically connected with the first end of the second winding resistor and the second end of the first winding resistor respectively. And the third piezoresistor and the first end and the second end of the first capacitor are electrically connected with the second end of the first winding resistor and the second end of the second winding resistor respectively. According to the utility model, when a surge enters an N line or an L line, the surge can be effectively inhibited and the circuit can be effectively protected based on the cross design of the winding resistor and the piezoresistor in the first surge module.

Description

Technical Field

[0001] The utility model belongs to the field of circuit design, and particularly relates to a surge suppression circuit. Background Art

[0002] An electrical surge is a peak value that exceeds the stable value in an instant, which includes surge voltage and surge current. Surge is also called a sudden wave, which means an instantaneous overvoltage that exceeds the normal working voltage. In essence, a surge is a violent pulse that occurs in just a few millionths of a second, which is likely to burn out the circuit at the moment of the surge, such as PN junction capacitor breakdown, resistor burnout, etc. In many backward areas abroad, the surge content of the power grid is very high, which brings safety risks to equipment. Utility Model Content

[0003] In order to solve the above problems, the utility model aims to provide a surge suppression circuit, which can effectively suppress surges by cross-designing a winding resistor and a varistor.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows.

[0005] A surge suppression circuit, characterized in that the circuit includes an N line, an L line, and a first surge module, wherein the first surge module includes a first winding resistor FR1, a second winding resistor FR2, a first varistor VR1, a second varistor VR2, a third varistor VR3, and a first capacitor C1; the first end and the second end of the first varistor VR1 are electrically connected to the first end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively, the first end and the second end of the second varistor VR2 are electrically connected to the first end of the second winding resistor FR2 and the second end of the first winding resistor FR1, the first end of the first winding resistor FR1 and the first end of the second winding resistor FR2 are electrically connected to the N line and the L line, the first end and the second end of the first capacitor C1 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, and the first end and the second end of the third varistor VR3 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively.

[0006] In this circuit, when a surge enters the N or L line, the surge can be effectively suppressed and the circuit can be effectively protected based on the cross design of the winding resistor and the varistor in the first surge module.

[0007] Furthermore, the circuit also includes a rectifier bridge BD1, the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2 are both electrically connected to the rectifier bridge BD1, and the rectifier bridge BD1 is connected to a VCC terminal and a GND terminal.

[0008] Furthermore, the circuit also includes a second surge module, which includes a diode D1 and an electrolytic capacitor CE1;

[0009] The first end and the second end of the diode D1 are electrically connected to the rectifier bridge BD1 and the first end of the electrolytic capacitor CE1 respectively, and the second end of the electrolytic capacitor CE1 is electrically connected to the rectifier bridge BD1; or the first end and the second end of the electrolytic capacitor CE1 are electrically connected to the rectifier bridge BD1 and the first end of the diode D1 respectively, and the second end of the diode D1 is electrically connected to the rectifier bridge BD1. The setting of the second surge module can suppress surge more effectively.

[0010] Further, the circuit also includes a third surge module, the third surge module includes a third winding resistor FR3, a fourth winding resistor FR4, a fourth varistor VR4, a fifth varistor VR5, a sixth varistor VR6, and a second capacitor C2; the first end and the second end of the fourth varistor VR4 are electrically connected to the first end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4, respectively; the first end and the second end of the fifth varistor VR5 are electrically connected to the first end of the fourth winding resistor FR4 and the second end of the third winding resistor FR3, respectively; the first end of the third winding resistor FR3 and the first end of the fourth winding resistor FR4 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively; the first end and the second end of the second capacitor C2 are electrically connected to the second end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4, respectively; the first end and the second end of the sixth varistor VR6 are electrically connected to the second end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4, respectively. The setting of the third surge module can more effectively suppress surges. Specifically, the first capacitor C1 and the second capacitor C2 may be thin film capacitors.

[0011] The beneficial effect of the present invention is that, in the present invention, when a surge enters the N or L line, based on the cross design of the winding resistor and the varistor in the first surge module, the surge can be effectively suppressed and the circuit can be effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the circuit schematic diagram of Example 1.

[0013] Figure 2 This is the circuit schematic diagram of Example 2.

[0014] Figure 3 This is the circuit schematic diagram of Example 3.

[0015] Figure 4 This is the circuit schematic diagram of Example 4.

[0016] Figure Number:

[0017] 11. First end of first wire-wound resistor FR1; 12. Second end of first wire-wound resistor FR1

[0018] 21. A first end of a second wire-wound resistor FR2; 22. A second end of a second wire-wound resistor FR2;

[0019] 31. A first end of a third wire-wound resistor FR3; 32. A second end of a third wire-wound resistor FR3;

[0020] 41. A first end of a fourth wire-wound resistor FR4; 42. A second end of a fourth wire-wound resistor FR4;

[0021] 51. a first end of the first varistor VR1; 52. a second end of the first varistor VR1;

[0022] 61. A first end of the second varistor VR2; 62. A second end of the second varistor VR2;

[0023] 71. a first end of a third varistor VR3; 72. a second end of a third varistor VR3;

[0024] 81. a first end of a fourth varistor VR4; 82. a second end of a fourth varistor VR4;

[0025] 91. A first end of a fifth varistor VR5; 92. A second end of a fifth varistor VR5;

[0026] 101. A first end of a sixth varistor VR6; 102. A second end of a sixth varistor VR6;

[0027] 111, a first end of the first capacitor C1; 112, a second end of the first capacitor C1;

[0028] 121, a first end of a second capacitor C2; 122, a second end of a second capacitor C2;

[0029] 131, a first end of the diode D1; 132, a second end of the diode D1;

[0030] 141. A first end of the electrolytic capacitor CE1; 142. A second end of the electrolytic capacitor CE1. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] This embodiment provides a surge suppression circuit, which specifically includes the following four embodiments:

[0033] See also Figure 1 , Embodiment 1:

[0034] A surge suppression circuit, characterized in that the circuit includes an N line, an L line, and a first surge module, wherein the first surge module includes a first winding resistor FR1, a second winding resistor FR2, a first varistor VR1, a second varistor VR2, a third varistor VR3, and a first capacitor C1; the first end and the second end of the first varistor VR1 are electrically connected to the first end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively, the first end and the second end of the second varistor VR2 are electrically connected to the first end of the second winding resistor FR2 and the second end of the first winding resistor FR1, the first end of the first winding resistor FR1 and the first end of the second winding resistor FR2 are electrically connected to the N line and the L line, the first end and the second end of the first capacitor C1 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, and the first end and the second end of the third varistor VR3 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively.

[0035] In this embodiment, the circuit further includes a rectifier bridge BD1, the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2 are both electrically connected to the rectifier bridge BD1, and the rectifier bridge BD1 is connected to a VCC terminal and a GND terminal.

[0036] See also Figure 2 , Embodiment 2:

[0037] A surge suppression circuit, characterized in that the circuit includes an N line, an L line, and a first surge module, wherein the first surge module includes a first winding resistor FR1, a second winding resistor FR2, a first varistor VR1, a second varistor VR2, a third varistor VR3, and a first capacitor C1; the first end and the second end of the first varistor VR1 are electrically connected to the first end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively, the first end and the second end of the second varistor VR2 are electrically connected to the first end of the second winding resistor FR2 and the second end of the first winding resistor FR1, the first end of the first winding resistor FR1 and the first end of the second winding resistor FR2 are electrically connected to the N line and the L line, the first end and the second end of the first capacitor C1 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, and the first end and the second end of the third varistor VR3 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively.

[0038] In this embodiment, the circuit further includes a rectifier bridge BD1 and a second surge module. The second end of the first winding resistor FR1 and the second end of the second winding resistor FR2 are both electrically connected to the rectifier bridge BD1, and the rectifier bridge BD1 is connected to a VCC terminal and a GND terminal.

[0039] The second surge module includes a diode D1 and an electrolytic capacitor CE1;

[0040] The first end and the second end of the electrolytic capacitor CE1 are electrically connected to the rectifier bridge BD1 and the first end of the diode D1 respectively, and the second end of the diode D1 is electrically connected to the rectifier bridge BD1.

[0041] See also Figure 3 , Embodiment 3:

[0042] A surge suppression circuit, characterized in that the circuit includes an N line, an L line, and a first surge module, wherein the first surge module includes a first winding resistor FR1, a second winding resistor FR2, a first varistor VR1, a second varistor VR2, a third varistor VR3, and a first capacitor C1; the first end and the second end of the first varistor VR1 are electrically connected to the first end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively, the first end and the second end of the second varistor VR2 are electrically connected to the first end of the second winding resistor FR2 and the second end of the first winding resistor FR1, the first end of the first winding resistor FR1 and the first end of the second winding resistor FR2 are electrically connected to the N line and the L line, the first end and the second end of the first capacitor C1 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, and the first end and the second end of the third varistor VR3 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively.

[0043] In this embodiment, the circuit further includes a rectifier bridge BD1, the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2 are both electrically connected to the rectifier bridge BD1, and the rectifier bridge BD1 is connected to a VCC terminal and a GND terminal.

[0044] In this embodiment, the circuit further includes a second surge module, and the second surge module includes a diode D1 and an electrolytic capacitor CE1;

[0045] The first end and the second end of the diode D1 are electrically connected to the rectifier bridge BD1 and the first end of the electrolytic capacitor CE1 respectively, and the second end of the electrolytic capacitor CE1 is electrically connected to the rectifier bridge BD1.

[0046] See also Figure 4 , Embodiment 4:

[0047] A surge suppression circuit, characterized in that the circuit includes an N line, an L line, and a first surge module, wherein the first surge module includes a first winding resistor FR1, a second winding resistor FR2, a first varistor VR1, a second varistor VR2, a third varistor VR3, and a first capacitor C1; the first end and the second end of the first varistor VR1 are electrically connected to the first end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively, the first end and the second end of the second varistor VR2 are electrically connected to the first end of the second winding resistor FR2 and the second end of the first winding resistor FR1, the first end of the first winding resistor FR1 and the first end of the second winding resistor FR2 are electrically connected to the N line and the L line, the first end and the second end of the first capacitor C1 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, and the first end and the second end of the third varistor VR3 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively.

[0048] In this embodiment, the circuit further includes a second surge module, a third surge module, and a rectifier bridge BD1;

[0049] The third surge module includes a third winding resistor FR3, a fourth winding resistor FR4, a fourth varistor VR4, a fifth varistor VR5, a sixth varistor VR6, and a second capacitor C2; the first end and the second end of the fourth varistor VR4 are electrically connected to the first end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4, respectively; the first end and the second end of the fifth varistor VR5 are electrically connected to the first end of the fourth winding resistor FR4 and the second end of the third winding resistor FR3, respectively; the first end of the third winding resistor FR3 and the first end of the fourth winding resistor FR4 are electrically connected to the second end of the first winding resistor FR1 and the second end of the second winding resistor FR2, respectively; the first end and the second end of the second capacitor C2 are electrically connected to the second end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4, respectively; the first end and the second end of the sixth varistor VR6 are electrically connected to the second end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4, respectively.

[0050] In this embodiment, the second end of the third winding resistor FR3 and the second end of the fourth winding resistor FR4 are both electrically connected to the rectifier bridge BD1, and the rectifier bridge BD1 is connected to a VCC terminal and a GND terminal.

[0051] The second surge module includes a diode D1 and an electrolytic capacitor CE1;

[0052] The first end and the second end of the diode D1 are electrically connected to the rectifier bridge BD1 and the first end of the electrolytic capacitor CE1 respectively, and the second end of the electrolytic capacitor CE1 is electrically connected to the rectifier bridge BD1.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A surge suppression circuit, characterized in that: The circuit includes an N line, an L line, and a first surge module. The first surge module includes a first winding resistor, a second winding resistor, a first varistor, a second varistor, a third varistor, and a first capacitor. The first end and the second end of the first varistor are electrically connected to the first end of the first winding resistor and the second end of the second winding resistor, respectively. The first end and the second end of the second varistor are electrically connected to the first end of the second winding resistor and the second end of the first winding resistor, respectively. The first end of the first winding resistor and the first end of the second winding resistor are electrically connected to the N line and the L line, respectively. The first end and the second end of the first capacitor are electrically connected to the second end of the first winding resistor and the second end of the second winding resistor, respectively. The first end and the second end of the third varistor are electrically connected to the second end of the first winding resistor and the second end of the second winding resistor, respectively.

2. A surge suppression circuit according to claim 1, characterized in that: The circuit also includes a rectifier bridge, the second end of the first winding resistor and the second end of the second winding resistor are both electrically connected to the rectifier bridge, and the rectifier bridge is connected to a VCC terminal and a GND terminal.

3. A surge suppression circuit according to claim 2, characterized in that: The circuit also includes a second surge module, which includes a diode and an electrolytic capacitor; The first end and the second end of the diode are electrically connected to the rectifier bridge and the first end of the electrolytic capacitor respectively, and the second end of the electrolytic capacitor is electrically connected to the rectifier bridge; or, the first end and the second end of the electrolytic capacitor are electrically connected to the rectifier bridge and the first end of the diode respectively, and the second end of the diode is electrically connected to the rectifier bridge.

4. A surge suppression circuit according to claim 3, characterized in that: The circuit also includes a third surge module, and the second surge module includes a third winding resistor, a fourth winding resistor, a fourth varistor, a fifth varistor, a sixth varistor, and a second capacitor; the first end and the second end of the fourth varistor are electrically connected to the first end of the third winding resistor and the second end of the fourth winding resistor, respectively, the first end and the second end of the fifth varistor are electrically connected to the first end of the fourth winding resistor and the second end of the third winding resistor, respectively, the first end of the third winding resistor and the first end of the fourth winding resistor are electrically connected to the second end of the first winding resistor and the second end of the second winding resistor, respectively, the first end and the second end of the second capacitor are electrically connected to the second end of the third winding resistor and the second end of the fourth winding resistor, respectively, and the first end and the second end of the sixth varistor are electrically connected to the second end of the third winding resistor and the second end of the fourth winding resistor, respectively.

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