CN209516928U - A kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source - Google Patents
A kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source Download PDFInfo
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- CN209516928U CN209516928U CN201920205987.9U CN201920205987U CN209516928U CN 209516928 U CN209516928 U CN 209516928U CN 201920205987 U CN201920205987 U CN 201920205987U CN 209516928 U CN209516928 U CN 209516928U
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Abstract
A kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source, it is related to a kind of EMC processing circuit, the circuit includes input module A1, filter module A2, rectification module A3, DC-DC normal shock modules A 4, output module A5, earthing module A6, safety capacitor CY1, safety capacitor CY2 two groups of filters of composition of common mode inductance LF2 and filter module A2；Common mode inductance LF1 and safety capacitor CY3 also constitute two groups of filters；Safety capacitor CY4, CY5 in common mode inductance LF3 and output module equally constitute two groups of filters, in addition it is also further filtered by high pressure ceramic disc capacitor C3, pass through differential mode inductance L1 attenuation common-mode electric current, by multiple filter, both it can effectively inhibit external environment to the electromagnetic interference of circuit, it can be effectively reduced the electromagnetic interference signal intensity of circuit itself again, so that circuit be made to reach the requirement that EMC is authenticated.
Description
Technical field
The utility model relates to a kind of EMC processing circuit, the EMC circuit of especially high-power squirrel-cage ortho-exciting electric source.
Background technique
EMC(Electro Magnetic Compatibility) refer to that equipment or system meet the requirements operation in its electromagnetic environment, not to its environment
In any equipment generate the ability of intolerable electromagnetic interference.How electromagnetic interference problem in ortho-exciting electric source is avoided always
It is to enable Electronics Engineers' pain in the neck feelings, the existing electromagnetic interference method reduced in switching power circuit is usually used one
The method that grade LC filtering noise reduction is combined with multiple capacitor filterings carries out, however product in this way carries out circuit product
Actual measurement conduction and radiation are above the limit value of Valuation Standard, can not meet EMC authentication requesting.
Summary of the invention
The purpose of this utility model is that avoiding shortcoming in the prior art and providing a kind of squirrel-cage 400W normal shock
The EMC circuit of power supply, for improving the EMC circuit of high-power squirrel-cage ortho-exciting electric source to conduction and radiation disturbance electromagnetic signal
Rejection ability, so that product be made to reach the requirement of EMC authentication test.
The purpose of the present invention is achieved through the following technical solutions:
A kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source is provided, is wanted for making forward power circuit reach EMC certification
It asks, including input module A1, filter module A2, rectification module A3, DC-DC normal shock modules A 4, A5 output module, earthing module
A6。
Wherein, input module A1 connected with the input terminal of filter module A2 by inductance LF2, the output end of filter module A2
It is connected by inductance LF1 with the input terminal of rectification module A3, the output end of rectification module A3 and the input of DC-DC normal shock modules A 4
The output end of end connection, DC-DC normal shock modules A 4 is connected by inductance LF3 with the input terminal of output module A5, the output mould
Block A5 includes output pin OUT+, output pin OUT-, capacitor CY4 and capacitor CY5, a termination output pin OUT of capacitor CY4
+, one end and ground of another termination CY5 of capacitor CY4, a termination inductance of another termination output pin OUT- capacitor C3 of CY5
An input pin of LF3, the node between another termination capacitor CY4 and capacitor CY5 of capacitor C3, earthing module A6 includes signal
Ground and inductance L1, signal ground connect the earth by inductance L1.
Further, the input module A1 includes fuse F1, a termination alternating current firewire of fuse F1, fuse F1
Another termination common mode inductance LF2 an input terminal, common mode inductance another input termination alternating current zero curve.
Further, the filter module A2 includes resistance R1, resistance R2, capacitor C1, capacitor CY1 and capacitor CY2, resistance
R1 mono- connects the section of mono- output end of inductance LF2, the one end capacitor C1, the one end capacitor CY1 and inductance LF1 input terminal
Point, one end of another terminating resistor R2 of resistance R1, another input terminal, the capacitor C1 of another termination inductance LF2 of resistance R2 are another
End, the one end capacitor CY2 and inductance LF1 another input terminal, another termination capacitor CY2 other end of capacitor CY1 and signal ground.
Further, the rectification module A3 includes diode D1, diode D2, diode D3 and diode D4, and four
Diode is connected into rectifier bridge stack, and an input of bridge heap terminates mono- output end of common mode inductance LF1, another input termination of bridge heap
Common mode inductance LF1 another output.
Further, capacitor C2, capacitor CY3, the one end capacitor C2 are connected between the filter module A2 and rectification module A3
Connect the node of inductance LF1 mono- output end and one input terminal of bridge heap, another termination inductance LF1 another output of capacitor C2 and
The node of another input terminal of bridge heap, capacitor CY3 mono- terminate an output end of rectifier bridge stack, another termination signal of capacitor CY3
Ground.
Preferably, the inductance LF1, inductance LF2, inductance LF3 are common mode inductance, and inductance L1 is differential mode inductance, capacitor C3
For high pressure ceramic disc capacitor, capacitor CY1, CY2, CY3, CY4, CY5 are safety capacitor.
Beneficial effects of the present invention: the utility model includes input module A1, filter module A2, rectification module A3, DC-DC
Normal shock modules A 4, output module A5, earthing module A6.Safety capacitor CY1, the safety electricity of common mode inductance LF2 and filter module A2
Hold CY2 and constitutes two groups of filters；Common mode inductance LF1 and safety capacitor CY3 also constitute two groups of filters；Common mode inductance LF3 with it is defeated
Safety capacitor CY4, CY5 in module equally constitute two groups of filters out, are in addition also carried out by high pressure ceramic disc capacitor C3 into one
Step filtering, both effectively can inhibit external environment to circuit by differential mode inductance L1 attenuation common-mode electric current by multiple filter
Electromagnetic interference, and the electromagnetic interference signal intensity of circuit itself can be effectively reduced, so that circuit be made to reach EMC certification
It is required that.
Detailed description of the invention
Invention is described further using attached drawing, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to the following drawings
Its attached drawing.
Fig. 1 is the circuit diagram that electric current is flowed into that output module A5 is flowed out from input module A1.
Fig. 2 is earthing module A6 circuit diagram.
Include in figure: input module A1, filter module A2, rectification module A3, DC-DC normal shock modules A 4, output module
A5, earthing module A6.
Specific embodiment
The utility model is further described with the following Examples.
A kind of EMC circuit of the squirrel-cage 400W ortho-exciting electric source of the present embodiment, as shown in Figure 1 and Figure 2, including input module
A1, filter module A2, rectification module A3, DC-DC normal shock modules A 4, output module A5, earthing module A6.
As shown in Figure 1 and Figure 2, input module A1 is connected with the input terminal of filter module A2, is filtered by common mode inductance LF2
The output end of modules A 2 is connected by common mode inductance LF1 with the input terminal of rectification module A3, the output end and DC- of rectification module A3
The input terminal of DC normal shock modules A 4 connects, and the output end of DC-DC normal shock modules A 4 passes through common mode inductance LF3's and output module A5
The signal ground of input terminal connection, earthing module A6 connects the earth by differential mode inductance L1, between filter module A2 and rectification module A3
It is connected to capacitor C2, safety capacitor CY3.
Input module A1 includes fuse F1, and the one of fuse F1 terminates alternating current firewire, and another termination of fuse F1 is total
An input terminal of mould inductance LF2, another input termination alternating current zero curve of common mode inductance, protects circuit by fuse.
Filter module A2 includes resistance R1, resistance R2, capacitor C1, safety capacitor CY1 and safety capacitor CY2, resistance R1 mono-
Connect an output end, the one end capacitor C1, safety one end capacitor CY1 and common mode inductance LF1 mono- input of common mode inductance LF2
End, one end of another terminating resistor R2 of resistance R1, another input terminal, the capacitor C1 of another termination common mode inductance LF2 of resistance R2
The other end, safety one end capacitor CY2 and common mode inductance LF1 another input terminal, another termination safety capacitor of safety capacitor CY1
The node of the CY2 other end and signal ground.Capacitor C1 is used as storage capacitor, and smothing filtering module output current, resistance R1, R2 are used for
The electric energy of capacitor surplus in circuit is consumed when breaking circuit.
Rectification module A3 includes that diode D1, diode D2, diode D3 and diode D4, four diodes are connected into rectification
Bridge heap, the node of input termination common mode inductance LF1 mono- output end and the one end capacitor C2 of bridge heap, another input of bridge heap
The node of common mode inductance LF1 another output and the capacitor C2 other end is terminated, an output of bridge heap terminates DC-DC normal shock mould
One input terminal of block, the another output of bridge heap connect another input terminal of safety capacitor CY3 and DC-DC normal shock module, peace
Another termination signal ground of capacitor is advised, capacitor C1 is used as storage capacitor.
DC-DC normal shock modules A 4 includes a DC-DC normal shock module, and two output ends of DC-DC normal shock module connect respectively
Two input terminals of common mode inductance LF3.
Output module A5 includes output pin OUT+, output pin OUT-, safety capacitor CY4 and safety capacitor CY5, safety
A termination output pin OUT+ of capacitor CY4, one end and ground of another termination safety capacitor CY5 of safety capacitor CY4, safety electricity
Hold another termination output pin OUT- of CY5, an input terminal of a termination common mode inductance LF3 of high pressure ceramic disc capacitor C3 is high
The node between another termination safety capacitor CY4 and safety capacitor CY5 of ceramic disc capacitor C3 is pressed, earthing module A6 includes signal ground
With differential mode inductance L1, signal ground connects the earth by differential mode inductance L1.
Safety capacitor CY1, safety capacitor CY2 two groups of filters of composition with filter module of common mode inductance LF2；Common mode electricity
Sense LF1 and safety capacitor CY3 also constitute two groups of filters；Common mode inductance LF3 and safety capacitor CY4, CY5 in output module are same
Sample constitutes two groups of filters, and this filter structure not only can inhibit external environment to the electromagnetic interference of circuit, but also the line that can decay
Road itself work when generate noise signal, noise jamming intensity can be effectively reduced, in addition also by high pressure ceramic disc capacitor C3 into
Row further filtering inhibits difference mode signal interference by differential mode inductance L1, achievees the purpose that filtering.
Cooperated by triple common mode inductance capacitors, common-mode signal can be inhibited to interfere and filtered, differential mode inductance inhibits differential mode
Signal interference, high pressure ceramic disc capacitor filtering, so not only can effectively inhibit external environment to the electromagnetic interference of circuit, but also can be with
It is effectively reduced the noise jamming intensity of circuit itself, so that circuit be made to reach the requirement that EMC is authenticated.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (9)
1. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source, including input module (A1), filter module (A2), rectification module
(A3), DC-DC normal shock module (A4), output module (A5), earthing module (A6), it is characterised in that: input module (A1) passes through
Inductance LF2 is connected with the input terminal of filter module (A2), the output end of filter module (A2) passes through inductance LF1 and rectification module
(A3) input terminal connection, the output end of rectification module (A3) are connected with the input terminal of DC-DC normal shock module (A4), and DC-DC is just
The output end for swashing module (A4) is connected by inductance LF3 with the input terminal of output module (A5), and the output module (A5) includes
Output pin OUT+, output pin OUT-, capacitor CY4 and capacitor CY5, a termination output pin OUT+ of capacitor CY4, capacitor
One end and ground of another termination CY5 of CY4, a termination inductance LF3's of another termination output pin OUT- of CY5, capacitor C3
One input pin, the node between another termination capacitor CY4 and capacitor CY5 of capacitor C3, earthing module (A6) includes signal ground
With inductance L1, signal ground connects the earth by inductance L1.
2. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 1, it is characterised in that: the input
Module (A1) includes fuse F1, and the one of fuse F1 terminates alternating current firewire, another termination common mode inductance LF2's of fuse F1
One input terminal, another input termination alternating current zero curve of common mode inductance.
3. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 1, it is characterised in that: the filtering
Module (A2) includes resistance R1, resistance R2, capacitor C1, capacitor CY1 and capacitor CY2, and resistance R1 mono- meets one of inductance LF2
Mono- output end, the one end capacitor C1, the one end capacitor CY1 and inductance LF1 input terminal, one end of another terminating resistor R2 of resistance R1,
Another is defeated by another input terminal, the capacitor C1 other end, the one end capacitor CY2 and the inductance LF1 of another termination inductance LF2 of resistance R2
Enter end, another termination capacitor CY2 other end of capacitor CY1 and signal ground.
4. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 3, it is characterised in that: the rectification
Module (A3) includes that diode D1, diode D2, diode D3 and diode D4, four diodes are connected into rectifier bridge stack, bridge heap
An input terminate mono- output end of common mode inductance LF1, bridge heap another input termination inductance LF1 another output.
5. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 4, it is characterised in that: the filtering
Be connected to capacitor C2 between module (A2) and rectification module (A3), capacitor CY3, capacitor C2 mono- terminate mono- output end of inductance LF1 and
The node of one input terminal of bridge heap, another termination common mode inductance LF1 another output of capacitor C2 and bridge heap another input terminal
Node, capacitor CY3 mono- terminate rectifier bridge stack an output end, another termination signal ground of capacitor CY3.
6. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 5, it is characterised in that: the capacitor
CY1, CY2, CY3, CY4, CY5 are safety capacitor.
7. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 1, it is characterised in that: the inductance
LF1, inductance LF2, inductance LF3 are common mode inductance.
8. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 1, it is characterised in that: the inductance
L1 is differential mode inductance.
9. a kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source according to claim 1, it is characterised in that: the capacitor
C3 is high pressure ceramic disc capacitor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920205987.9U CN209516928U (en) | 2019-02-18 | 2019-02-18 | A kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920205987.9U CN209516928U (en) | 2019-02-18 | 2019-02-18 | A kind of EMC circuit of squirrel-cage 400W ortho-exciting electric source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246652A1 (en) * | 2022-06-20 | 2023-12-28 | 华为技术有限公司 | Power transmission system and power generation system |
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2019
- 2019-02-18 CN CN201920205987.9U patent/CN209516928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246652A1 (en) * | 2022-06-20 | 2023-12-28 | 华为技术有限公司 | Power transmission system and power generation system |
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