CN212515513U - Constant current source circuit applied to residual current circuit breaker - Google Patents
Constant current source circuit applied to residual current circuit breaker Download PDFInfo
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- CN212515513U CN212515513U CN202021779790.5U CN202021779790U CN212515513U CN 212515513 U CN212515513 U CN 212515513U CN 202021779790 U CN202021779790 U CN 202021779790U CN 212515513 U CN212515513 U CN 212515513U
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Abstract
The utility model discloses an use constant current source circuit on electric leakage circuit breaker, including rectifier module and constant current module, constant current module is including constant current chip U1, constant current chip U2, resistance R1, resistance R2, resistance R3 and zener diode D5, constant current chip U1's input links to each other with resistance R1's one end, this end links to each other with rectifier module simultaneously, resistance R1's the other end is connected at constant current chip U1's earthing terminal and resistance R2's one end, zener diode D5's negative pole and constant current chip U2's earthing terminal are connected to resistance R2's the other end, constant current chip U1's output links to each other with constant current chip U2's input, constant current chip U2's output is connected in resistance R3's one end, zener diode D5's positive pole is connected to resistance R3's the other end, this end inserts to electric leakage circuit breaker as the feeder ear. The utility model has the advantages of it is following and effect: the power factor can reach more than 0.9 and the loss is effectively reduced, wherein the power can operate under 50V, the power is less than 0.2W at 220V.
Description
Technical Field
The utility model relates to a circuit breaker technical field, in particular to use constant current source circuit on electric leakage circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. In order to meet 50V action, the current ratio of a common leakage circuit board in the existing circuit breaker is larger at 220V, and if the leakage circuit board is reduced by resistance, the power is larger than 0.3W and can not meet the requirement of the standard smaller than 0.3W; the power factor is typically less than 0.2 if a resistor-capacitor voltage reduction is used. Therefore, if a constant current source circuit capable of operating at 50V, having a power of less than 0.2W at 220V and having a power factor of 0.9 or more can be provided, the loss can be reduced and the resource utilization can be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an use constant current source circuit on electric leakage circuit breaker to solve the problem that proposes in the background art.
The above technical purpose of the present invention can be achieved by the following technical solutions: a constant current source circuit applied to a leakage circuit breaker comprises a rectifying module and a constant current module, wherein the rectifying module can rectify an input power supply and then output the rectified power supply to the constant current module;
the constant current module comprises a constant current chip U1, a constant current chip U2, a resistor R1, a resistor R2, a resistor R3 and a voltage stabilizing diode D5, wherein the input end of the constant current chip U1 is connected with one end of a resistor R1, the end is connected with the rectifying module at the same time, the other end of the resistor R1 is connected with the grounding end of the constant current chip U1 and one end of the resistor R2, the other end of the resistor R2 is connected with the negative electrode of the voltage stabilizing diode D5 and the grounding end of the constant current chip U2, the output end of the constant current chip U1 is connected with the input end of the constant current chip U2, the output end of the constant current chip U2 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the positive electrode of the voltage stabilizing diode.
The further setting is that: the rectifying module comprises a rectifying diode D1, a rectifying diode D2, a rectifying diode D3 and a rectifying diode D4, wherein the anode of the rectifying diode D1 is connected with the cathode of the rectifying diode D3, the cathode of the rectifying diode D1 is connected with the cathode of the rectifying diode D2, the anode of the rectifying diode D2 is connected with the cathode of the rectifying diode D4, the anode of the rectifying diode D4 is connected with the anode of the rectifying diode D3, and the ends of the rectifying diode D4 are grounded; two ends of an input power supply are respectively connected with the anode of the rectifier diode D1 and the anode of the rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the input end of the constant current chip U1.
The utility model has the advantages that:
1. the utility model discloses a form of constant current source can improve supply voltage to electric current when can realizing 50V is the same basically with the electric current when 300V, thereby the too big condition of power consumption appears when having avoided the high pressure, and the sample actual measurement power is only 0.13W when 220V.
2. The utility model discloses because of not using step-down electric capacity so power factor high, generally more than 0.9, and satisfy the standard requirement that consumed power is less than 0.3W completely, effectively reduce the loss, improve the utilization ratio of resource.
Drawings
Fig. 1 is a circuit diagram of an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a constant current source circuit applied to a leakage circuit breaker includes a rectifying module and a constant current module, wherein the rectifying module can rectify an input power and output the rectified power to the constant current module;
the constant current module comprises a constant current chip U1, a constant current chip U2, a resistor R1, a resistor R2, a resistor R3 and a voltage stabilizing diode D5, wherein the input end of the constant current chip U1 is connected with one end of a resistor R1, the end is simultaneously connected with the rectifying module, the other end of the resistor R1 is connected with the grounding end of the constant current chip U1 and one end of a resistor R2, the other end of the resistor R2 is connected with the negative electrode of the voltage stabilizing diode D5 and the grounding end of the constant current chip U2, the output end of the constant current chip U1 is connected with the input end of the constant current chip U2, the output end of the constant current chip U2 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the positive electrode of the voltage stabilizing diode D.
The rectifying module comprises a rectifying diode D1, a rectifying diode D2, a rectifying diode D3 and a rectifying diode D4, wherein the anode of the rectifying diode D1 is connected with the cathode of the rectifying diode D3, the cathode of the rectifying diode D1 is connected with the cathode of the rectifying diode D2, the anode of the rectifying diode D2 is connected with the cathode of the rectifying diode D4, the anode of the rectifying diode D4 is connected with the anode of the rectifying diode D3, and the ends are grounded at the same time; two ends of an input power supply are respectively connected with the anode of the rectifier diode D1 and the anode of the rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the input end of the constant current chip U1.
In this embodiment, the types of the constant current chip U1 and the constant current chip U2 are BP9918B, and certainly, other types of voltage stabilization chips are also available, the resistances of the resistor R1 and the resistor R2 are 1M ohm, the resistance of the resistor R3 is 10K ohm, and the zener diode D5 is a 9.1V voltage regulator tube; the model numbers of the rectifier diode D1, the rectifier diode D2, the rectifier diode D3 and the rectifier diode D4 are all 1N 4007.
It should be noted that the present embodiment discloses specific detailed circuit diagrams, and those skilled in the art should understand and understand that the present embodiment is implementable and novel.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (2)
1. The utility model provides an use constant current source circuit on electric leakage circuit breaker which characterized in that: the rectifier module can rectify an input power supply and then output the rectified power supply to the constant current module;
the constant current module comprises a constant current chip U1, a constant current chip U2, a resistor R1, a resistor R2, a resistor R3 and a voltage stabilizing diode D5, wherein the input end of the constant current chip U1 is connected with one end of a resistor R1, the end is connected with the rectifying module at the same time, the other end of the resistor R1 is connected with the grounding end of the constant current chip U1 and one end of the resistor R2, the other end of the resistor R2 is connected with the negative electrode of the voltage stabilizing diode D5 and the grounding end of the constant current chip U2, the output end of the constant current chip U1 is connected with the input end of the constant current chip U2, the output end of the constant current chip U2 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the positive electrode of the voltage stabilizing diode.
2. The constant current source circuit applied to the residual current circuit breaker according to claim 1, wherein: the rectifying module comprises a rectifying diode D1, a rectifying diode D2, a rectifying diode D3 and a rectifying diode D4, wherein the anode of the rectifying diode D1 is connected with the cathode of the rectifying diode D3, the cathode of the rectifying diode D1 is connected with the cathode of the rectifying diode D2, the anode of the rectifying diode D2 is connected with the cathode of the rectifying diode D4, the anode of the rectifying diode D4 is connected with the anode of the rectifying diode D3, and the ends of the rectifying diode D4 are grounded; two ends of an input power supply are respectively connected with the anode of the rectifier diode D1 and the anode of the rectifier diode D2, and the cathode of the rectifier diode D2 is connected with the input end of the constant current chip U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021779790.5U CN212515513U (en) | 2020-08-24 | 2020-08-24 | Constant current source circuit applied to residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021779790.5U CN212515513U (en) | 2020-08-24 | 2020-08-24 | Constant current source circuit applied to residual current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212515513U true CN212515513U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021779790.5U Active CN212515513U (en) | 2020-08-24 | 2020-08-24 | Constant current source circuit applied to residual current circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212515513U (en) |
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2020
- 2020-08-24 CN CN202021779790.5U patent/CN212515513U/en active Active
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