CN209488861U

CN209488861U - A kind of protection control circuit of Anti-surging impact or current break

Info

Publication number: CN209488861U
Application number: CN201821749768.9U
Authority: CN
Inventors: 区志杨; 谢赞雄; 柯柏权
Original assignee: Guangdong China Shine Photoelectric Technology Co Ltd; FOSHAN HUAQUAN ELECTRICAL LIGHTING CO LTD
Current assignee: Guangdong China Shine Photoelectric Technology Co Ltd; FOSHAN HUAQUAN ELECTRICAL LIGHTING CO LTD
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2019-10-11
Anticipated expiration: 2028-10-26

Abstract

The utility model discloses a kind of impact of Anti-surging or the protection control circuits of current break, including transformer, one termination em filtering/rectification circuit of the primary side of transformer, em filtering/rectification circuit connects the firewire and zero curve of alternating current, the primary side junction connection control circuit of em filtering/rectification circuit and transformer, the other end of transformer primary side is by connecing the drain electrode of switching tube, the grid grade connection control circuit of switching tube, the source level of switching tube connects sample circuit, the ground terminal of sample circuit is grounded, sample circuit connects control circuit by reversed current feed circuit, the secondary of transformer flanks rectifying/filtering circuit, rectifying/filtering circuit connects the positive terminals of load and the negative terminals of load, the both ends of feed circuit are connected in parallel with a capacitor.Above structure can protect entire circuit normal operation to avoid device failures such as the switching tubes of circuit.

Description

A kind of protection control circuit of Anti-surging impact or current break

Technical field

The utility model relates to circuit fields, particularly, are related to a kind of impact of Anti-surging or the protection of current break control Circuit.

Background technique

Only for LED illumination lamp under thunder and lightning environment, or under the harmonic wave and surge impact of high energy, spoilage is very high at present, That is up to the present puzzlement LED illumination promotes and applies most fatal reason, has arrived difficulty extremely to be solved too impatient to wait Topic.Once LED drive power and the experience of entire illuminator are struck by lightning or under the harmonic wave and surge impact of high energy, are driven by LED Generation moment high energy surge between input terminal L, N line of dynamic power supply, scurries into the route of LED drive power, LED is caused to drive The main circuit device of dynamic power supply, such as switching tube, rectifier diode are impacted and punch through damage by instantaneous large-current.

Utility model content

For overcome the deficiencies in the prior art, the utility model provides a kind of impact of Anti-surging or the protection control of current break Circuit processed.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

The protection control circuit of a kind of impact of Anti-surging or current break, including transformer, the primary side of the transformer A termination em filtering/rectification circuit, the em filtering/rectification circuit connects the firewire and zero curve of alternating current, the electromagnetism filter The primary side junction connection control circuit of wave/rectification circuit and transformer, the other end of the transformer primary side is by connecing out The drain electrode of pipe, the grid grade connection control circuit of switching tube are closed, the source level of switching tube connects sample circuit, the ground terminal of the sample circuit Ground connection, the sample circuit connect control circuit by reversed current feed circuit, and the secondary of the transformer flanks rectification/filtered electrical Road, the rectifying/filtering circuit connect the positive terminals of load and the negative terminals of load, the both ends parallel connection one of the feed circuit A capacitor.

Preferably, the junction of control circuit and feed circuit is connected to the ground terminal of sample circuit by ground capacity, adds The reaction speed of fast control circuit.

Preferably, ground capacity can filter noise, and the capacitance of the capacitor is bigger than the capacitance of ground capacity, more quickly So that control circuit is sensed overcurrent and is reacted in time.

The utility model has the advantages that

By above scheme it is found that sample circuit connects control circuit by feed circuit, feed circuit both ends are one in parallel Capacitor.In surge impact, the overcurrent of generation when passing through feed circuit by the capacitor of feed circuit both ends parallel connection, in this way Control circuit can be allowed quickly to sense the presence of overcurrent, and make and timely reacting, the switching tube of circuit is avoided to damage, Protect entire circuit normal operation.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is an embodiment of the present invention；

Fig. 2 is another embodiment of the utility model；

Fig. 3 is the concrete application of the utility model in circuit.

Specific embodiment

Referring to Fig.1, an embodiment of the present invention provides a kind of impact of Anti-surging or the protection control of current break Circuit processed, including transformer T, a termination em filtering/rectification circuit 1 of the primary side of the transformer T, the electromagnetism filter Wave/rectification circuit 1 meets the firewire L of alternating current and zero curve N, the em filtering/rectification circuit 1 are connect with the primary side of transformer T Locate connection control circuit 2, the other end of the transformer T primary side connects control by connecing the drain electrode of switching tube Q, the grid grade of switching tube Q Circuit 1 processed, the source level of switching tube Q connect sample circuit 3, the ground terminal ground connection of the sample circuit 3, and the sample circuit 3 passes through Reversed current feed circuit 5 connects control circuit 2, and the secondary of the transformer T flanks rectifying/filtering circuit 4, the rectification/filtered electrical Road 4 meets the positive terminals LED+ of load and the negative terminals LED- of load, and the both ends of the feed circuit 5 are connected in parallel with a capacitor C.

The junction of control circuit 2 and feed circuit 5 is connected to the ground terminal of sample circuit 3, ground connection by ground capacity C1 Capacitor can filter noise, accelerate the reaction speed of control circuit 2

The capacitance of the capacitor C is bigger than the capacitance of ground capacity C1, and control circuit 2 is more quickly made to sense overcurrent And it reacts in time.

Sample circuit 3 connects control circuit 2 by feed circuit 5, and 5 both ends of feed circuit are connected in parallel with a capacitor C.In surge When impact, the capacitor C of the overcurrent of generation when passing through feed circuit 5 by the parallel connection of 5 both ends of feed circuit can allow control in this way Circuit 2 quickly senses the presence of overcurrent, and force switch pipe Q is closed or adjustment duty ratio, avoids the switch of circuit Pipe Q damage, protects entire circuit normal operation.

Transformer primary side can connect one or more circuits with sample circuit in the technical program, as shown in Fig. 2, Capacitor C2 and capacitor C3 is respectively the capacitor of two feed circuit both ends parallel connections.

As long as the circuit being connected with transformer primary side is connected by feed circuit with sample circuit, so that it may use this skill The form of feed circuit shunt capacitance guarantees that switching tube in circuit or rectifier diode will not be because of surge impacts in art scheme And it damages.

Fig. 3 is the concrete application of the technical program in circuit.

The above is the better embodiment of the utility model, but the utility model is not limited to above-described embodiment, As long as its technical effect for reaching the utility model with any same or similar means, should all fall into the protection model of the utility model Within enclosing.

Claims

1. the protection control circuit of a kind of Anti-surging impact or current break, including transformer, the primary side of the transformer One termination em filtering/rectification circuit, the em filtering/rectification circuit connect the firewire and zero curve of alternating current, and the em filtering/ The primary side junction connection control circuit of rectification circuit and transformer, the other end of the transformer primary side is by connecing switching tube Drain electrode, the grid grade connection control circuit of switching tube, the source level of switching tube connect sample circuit described in sample circuit ground terminal ground connection, The sample circuit connects control circuit by reversed current feed circuit, and the secondary of the transformer flanks rectifying/filtering circuit, described Rectifying/filtering circuit connects the positive terminals of load and the negative terminals of load, it is characterised in that: the both ends of the feed circuit are simultaneously Join a capacitor.

2. the protection control circuit of a kind of Anti-surging impact according to claim 1 or current break, it is characterised in that: control The junction of circuit and feed circuit processed is connected to the ground terminal of sample circuit by ground capacity.

3. the protection control circuit of a kind of Anti-surging impact according to claim 2 or current break, it is characterised in that: institute The capacitance for stating capacitor is bigger than the capacitance of ground capacity.