CN104519624A - Anti-interference circuit and lamp - Google Patents

Anti-interference circuit and lamp Download PDF

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Publication number
CN104519624A
CN104519624A CN201310463781.3A CN201310463781A CN104519624A CN 104519624 A CN104519624 A CN 104519624A CN 201310463781 A CN201310463781 A CN 201310463781A CN 104519624 A CN104519624 A CN 104519624A
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CN
China
Prior art keywords
circuit
diode
filter circuit
filter
transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310463781.3A
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Chinese (zh)
Inventor
周明杰
刘百顺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Original Assignee
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oceans King Lighting Science and Technology Co Ltd, Shenzhen Oceans King Lighting Engineering Co Ltd filed Critical Oceans King Lighting Science and Technology Co Ltd
Priority to CN201310463781.3A priority Critical patent/CN104519624A/en
Publication of CN104519624A publication Critical patent/CN104519624A/en
Pending legal-status Critical Current

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Abstract

An embodiment of the invention discloses an anti-interference circuit and a lamp. The anti-interference circuit is composed of discrete components. By the anti-interference circuit, anti-interference capability of the circuit can be improved, stable voltage can be output, product performance is effectively improved, and service life of products is prolonged.

Description

A kind of anti-jamming circuit and light fixture
Technical field
The present invention relates to protective circuit, particularly relate to a kind of anti-jamming circuit and light fixture.
Background technology
Illuminating product in modern society's application widely and important, and all may be different in all trades and professions application.But same object be all for user provide enough brightness to read to enable user carry out in the insufficient place of light, work, study etc.
Along with the raising of people's quality of the life, user requires more and more higher to lighting quality, also more and more higher to the performance requirement of light fixture product, but current existing light fixture may because the drive circuit of light fixture be due to the impact of interference signal, cause the instability of output voltage and make light fixture in the process of illumination, the brightness of light differs, and have impact on the reading of user, work, study etc., and the eyesight of user may be affected, bring inconvenience to user.Meanwhile, the useful life that the instability possibility light fixture due to input voltage is also less than expection just scraps, brings economic loss to user.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of anti-jamming circuit.The antijamming capability of circuit can be improved, enhance product performance.
In order to solve the problems of the technologies described above, embodiments provide a kind of anti-jamming circuit, comprising:
The secondary winding of transformer T1, diode D2 and the first filter circuit;
The anode of described diode D2 is connected with one end of the secondary winding of described transformer T1, and the negative pole of described diode D2 is connected with described load one end, and the other end of the secondary winding of described transformer T1 is connected with described earth terminal;
One end of described first filter circuit is connected with one end of the secondary winding of described transformer T1 with the anode of described diode D2 respectively, and the other end of described first filter circuit is connected with the negative pole of described diode D2.
Wherein, described first filter circuit comprises:
Electric capacity C3, resistance R1 and diode D1;
One end of described electric capacity C3 is connected with one end of the anode of described diode D2, secondary winding one end of transformer T1 and resistance R1 respectively, the other end of described electric capacity C3 is connected with the negative electrode of described diode D1 and the other end of resistance R1 respectively, and the anode of described diode D1 is connected with the negative pole of described diode D2.
Wherein, described circuit also comprises:
Second filter circuit and the 3rd filter circuit;
One end of described second filter circuit is connected with the negative pole of described diode D2, and the other end of described second filter circuit is connected with described earth terminal;
One end of described 3rd filter circuit is connected with the anode of the diode D1 of described first filter circuit, and the other end of described 3rd filter circuit is connected with described earth terminal.
Wherein, described second filter circuit comprises:
Filter capacitor C1;
One end of described filter capacitor C1 is connected with the negative pole of described diode D2, and the other end of described filter capacitor C2 is connected with described earth terminal.
Wherein, described 3rd filter circuit comprises:
Filter capacitor C2;
One end of described filter capacitor C2 is connected with the anode of the diode D1 of described first filter circuit, and the other end of described filter capacitor C2 is connected with described earth terminal.
Wherein, described filter capacitor C1 is the capacitance when both end voltage is 50V is the electrochemical capacitor of 330uF;
The electrochemical capacitor of described filter capacitor C2 to be the capacitance when both end voltage is 50V be 330 μ F.
Wherein, the resistance of described resistance R1 is 100K Ω.
Wherein, the capacitance of described electric capacity C3 is 0.01 μ F.
Correspondingly, present invention also offers light fixture described in a kind of light fixture and comprise above-described anti-jamming circuit.
Implement the embodiment of the present invention, there is following beneficial effect:
Anti-jamming circuit structure of the present invention is simple, safe and reliable.Effectively can improve the antijamming capability in circuit, stable output voltage, effectively enhances product performance, and extends product useful life, saves user's spending.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of a kind of anti-jamming circuit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, is the circuit theory diagrams of the anti-jamming circuit that the embodiment of the present invention provides.As shown in Figure 1, described circuit comprises earth terminal 100 and load 200, and described circuit also comprises:
The secondary winding of transformer T1, diode D2 and the first filter circuit 300.
The anode of described diode D2 is connected with one end of the secondary winding of described transformer T1, and the negative pole of described diode D2 is connected with described load 200 one end, and the other end of the secondary winding of described transformer T1 is connected with described earth terminal 100;
One end of described first filter circuit 300 is connected with one end of the secondary winding of described transformer T1 with the anode of described diode D2 respectively, and the other end of described first filter circuit 300 is connected with the negative pole of described diode D2.
Further, in embodiments of the present invention, described first filter circuit 300 also comprises: electric capacity C3, resistance R1 and diode D1;
One end of described electric capacity C3 is connected with one end of the anode of described diode D2, secondary winding one end of transformer T1 and resistance R1 respectively, the other end of described electric capacity C3 is connected with the negative electrode of described diode D1 and the other end of resistance R1 respectively, and the anode of described diode D1 is connected with the negative pole of described diode D2.Wherein, the resistance of described resistance R1 is 100K Ω, and the capacitance of described electric capacity C3 is 0.01 μ F, and the model of described diode D1 can be HER108.
Further, in embodiments of the present invention, described circuit also comprises the second filter circuit 400 and the 3rd filter circuit 500.
One end of described second filter circuit 400 is connected with the negative pole of described diode D2, and the other end of described second filter circuit 400 is connected with described earth terminal 100;
One end of described 3rd filter circuit 500 is connected with the anode of the diode D1 of described first filter circuit, and the other end of described 3rd filter circuit 500 is connected with described earth terminal 100.
Further, in embodiments of the present invention, described second filter circuit 400 comprises:
Filter capacitor C1;
One end of described filter capacitor C1 is connected with the negative pole of described diode D2, and the other end of described filter capacitor C2 is connected with described earth terminal.Wherein, described filter capacitor C1 is the capacitance when both end voltage is 50V is the electrochemical capacitor of 330uF.
In embodiments of the present invention, described 3rd filter circuit 500 comprises:
Filter capacitor C2;
One end of described filter capacitor C2 is connected with the anode of the diode D1 of described first filter circuit, and the other end of described filter capacitor C2 is connected with described earth terminal.Wherein, the electrochemical capacitor of described filter capacitor C2 to be the capacitance when both end voltage is 50V be 330 μ F.
The invention provides a kind of light fixture, described light fixture can comprise anti-jamming circuit, and the circuit structure of the anti-jamming circuit of described light fixture can see Fig. 1.
Composition graphs 1 more below, is described in detail the operation principle of described anti-jamming circuit.
This anti-jamming circuit can be the output-stage circuit of the drive circuit of light fixture, and transformer T is switching tube, and the exportable voltage 80V of secondary winding of transformer T1, wherein, electric current carries out rectification output, for loaded work piece through diode D2.Wherein, diode D2 can be the fast recovery diode that model is SF56.Further, the crest voltage in the filter capacitor C1 in circuit and filter capacitor C2 absorbing circuit and other interfering noise signals.
Further, due to the existence of transformer T1 leakage inductance, and electric current is pulsating current and there is back-emf, the moment that switching tube transformer T1 is turning off can produce the interference voltages such as very large peak voltage, it is limited that filter capacitor C1 in circuit and filter capacitor C2 absorbs described interference voltage, causes the output of the secondary winding of switching tube transformer T to be disturbed voltage influence and cause voltage not steady.When the voltage that the secondary winding output of switching tube transformer T1 exports carries interference voltage, interference voltage makes the diode D1 conducting of the first filter circuit and charges to electric capacity C3, and electric capacity is by the consumed energy that discharges to resistance R1.Now C3 consumes the energy of interference voltage, the voltage of diode D2 still stable output.Thus effectively improve the power factor of the output stage of drive circuit, improve the antijamming capability of circuit, and circuit loss is reduced, realize the object of stable output voltage.
In sum, voltage follower circuit structure of the present invention is simple, safe and reliable.Effectively can reduce the harmonic wave in circuit, stable output voltage, effectively enhances product performance, and extends product useful life, saves user's spending.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.

Claims (9)

1. an anti-jamming circuit, described circuit comprises earth terminal and load, it is characterized in that, described circuit comprises:
The secondary winding of transformer T1, diode D2 and the first filter circuit;
The anode of described diode D2 is connected with one end of the secondary winding of described transformer T1, and the negative pole of described diode D2 is connected with described load one end, and the other end of the secondary winding of described transformer T1 is connected with described earth terminal;
One end of described first filter circuit is connected with one end of the secondary winding of described transformer T1 with the anode of described diode D2 respectively, and the other end of described first filter circuit is connected with the negative pole of described diode D2.
2. circuit as claimed in claim 1, it is characterized in that, described first filter circuit comprises:
Electric capacity C3, resistance R1 and diode D1;
One end of described electric capacity C3 is connected with one end of the anode of described diode D2, secondary winding one end of transformer T1 and resistance R1 respectively, the other end of described electric capacity C3 is connected with the negative electrode of described diode D1 and the other end of resistance R1 respectively, and the anode of described diode D1 is connected with the negative pole of described diode D2.
3. circuit as claimed in claim 2, it is characterized in that, described circuit also comprises:
Second filter circuit and the 3rd filter circuit;
One end of described second filter circuit is connected with the negative pole of described diode D2, and the other end of described second filter circuit is connected with described earth terminal;
One end of described 3rd filter circuit is connected with the anode of the diode D1 of described first filter circuit, and the other end of described 3rd filter circuit is connected with described earth terminal.
4. method as claimed in claim 3, it is characterized in that, described second filter circuit comprises:
Filter capacitor C1;
One end of described filter capacitor C1 is connected with the negative pole of described diode D2, and the other end of described filter capacitor C2 is connected with described earth terminal.
5. method as claimed in claim 4, it is characterized in that, described 3rd filter circuit comprises:
Filter capacitor C2;
One end of described filter capacitor C2 is connected with the anode of the diode D1 of described first filter circuit, and the other end of described filter capacitor C2 is connected with described earth terminal.
6. method as claimed in claim 5, it is characterized in that, described filter capacitor C1 is the capacitance when both end voltage is 50V is the electrochemical capacitor of 330uF;
The electrochemical capacitor of described filter capacitor C2 to be the capacitance when both end voltage is 50V be 330 μ F.
7. method as claimed in claim 6, it is characterized in that, the resistance of described resistance R1 is 100K Ω.
8. method as claimed in claim 7, it is characterized in that, the capacitance of described electric capacity C3 is 0.01 μ F.
9. a light fixture, is characterized in that, described light fixture comprises the anti-jamming circuit as described in any one of claim 1-8.
CN201310463781.3A 2013-09-30 2013-09-30 Anti-interference circuit and lamp Pending CN104519624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310463781.3A CN104519624A (en) 2013-09-30 2013-09-30 Anti-interference circuit and lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310463781.3A CN104519624A (en) 2013-09-30 2013-09-30 Anti-interference circuit and lamp

Publications (1)

Publication Number Publication Date
CN104519624A true CN104519624A (en) 2015-04-15

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Family Applications (1)

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CN201310463781.3A Pending CN104519624A (en) 2013-09-30 2013-09-30 Anti-interference circuit and lamp

Country Status (1)

Country Link
CN (1) CN104519624A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201854482U (en) * 2010-11-01 2011-06-01 王子能 LED power circuit
CN202310225U (en) * 2011-10-31 2012-07-04 玮滔环保产品有限公司 LED lamp tube driving circuit applicable to bracket lamp with backup power supply
CN202586319U (en) * 2012-04-17 2012-12-05 奇瑞汽车股份有限公司 Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger
CN203069801U (en) * 2013-02-28 2013-07-17 湖南科技大学 Anti-explosion wave-absorbing circuit module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201854482U (en) * 2010-11-01 2011-06-01 王子能 LED power circuit
CN202310225U (en) * 2011-10-31 2012-07-04 玮滔环保产品有限公司 LED lamp tube driving circuit applicable to bracket lamp with backup power supply
CN202586319U (en) * 2012-04-17 2012-12-05 奇瑞汽车股份有限公司 Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger
CN203069801U (en) * 2013-02-28 2013-07-17 湖南科技大学 Anti-explosion wave-absorbing circuit module

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Application publication date: 20150415