CN207705774U - A kind of three phase converter circuit and frequency converter - Google Patents
A kind of three phase converter circuit and frequency converter Download PDFInfo
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- CN207705774U CN207705774U CN201820034745.3U CN201820034745U CN207705774U CN 207705774 U CN207705774 U CN 207705774U CN 201820034745 U CN201820034745 U CN 201820034745U CN 207705774 U CN207705774 U CN 207705774U
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Abstract
The utility model discloses a kind of three phase converter circuit and frequency converter, the input terminal that circuit is included in common mode inductance accesses the first X capacitances, the 2nd X capacitances and the 3rd X capacitances, output end accesses the 4th X capacitances, the 5th X capacitances, the 6th X capacitances, the first Y capacitance, the second varistor and second gas discharge tube that the output end of common mode inductance also accesses the first varistor being connected in series with and first gas discharge tube, is connected in series with are connected in series with, and the third varistor and third gas discharge tube being connected in series with.The advantages of three phase converter circuit described in the utility model has circuit structure simple, low manufacture cost, and can disposably be tested by surge test and varistor in the case where not damaging frequency converter product.
Description
Technical field
The utility model is related to a kind of converter technology fields, more particularly, to a kind of three phase converter circuit and frequency conversion
Device.
Background technology
Currently, frequency converter in the market is all made of varistor or gas-discharge tube is used as lightning stroke, surge voltage protection.
To carrying the product of PEC (Protection Electronic Circuit protect electronic circuit) function usually using pressure-sensitive electricity
Resistance, however in safety test, it is necessary to whether its short circuit is safe when verifying varistor normal work, even if damaging
It will not cause fire and reduce the insulating properties of product.
Varistor is connected using Y types with Δ type in major part three phase converter product at present.This two ways is carrying out
The case where will appear component damage or product rejection when single varistor short circuit.In addition, due to each varistor
It is required for doing same test, it is therefore desirable to prepare multiple products and be tested, not only testing efficiency is low, but also cannot ensure
Centainly by test, a large amount of manpower, physics cost are wasted.
For gas-discharge tube, once would be at short-circuit condition after work, until both ends, virtual voltage drops to 0V
It can restore.Lightning stroke or surge voltage are met with when test, then product can not work, it is necessary to it could restore after power-off, and
In the presence of the risk that may destroy product.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art, a kind of three phase converter circuit and frequency conversion are provided
Device is disposably tested by surge test and varistor in the case where not damaging frequency converter product.
To achieve the above object, the utility model proposes following technical solutions：A kind of three phase converter circuit, including first
Firewire input terminal, the second firewire input terminal, third firewire input terminal, the first fire wire output end, the second fire wire output end, third fire
Line output terminal, zero curve input terminal, zero line output end, common mode inductance, the first X capacitances, the 2nd X capacitances, the 3rd X capacitances, the 4th X electricity
Appearance, the 5th X capacitances, the 6th X capacitances, the first Y capacitance, the first varistor, the second varistor, third varistor, first
Gas-discharge tube, second gas discharge tube, third gas discharge tube；
The first input end of the common mode inductance is connected with the first firewire input terminal, and the first output end and the first firewire are defeated
Outlet is connected；Second input terminal of the common mode inductance is connected with the second firewire input terminal, second output terminal and the second fire
Line output terminal is connected；The third input terminal of the common mode inductance is connected with third firewire input terminal, third output end and
Three fire wire output ends are connected；
One end of the first X capacitances is connected between the first firewire input terminal and the first input end of common mode inductance, institute
The one end for stating the 2nd X capacitances is connected between the second firewire input terminal and the second input terminal of common mode inductance, the 3rd X capacitances
One end be connected between third firewire input terminal and the third input terminal of common mode inductance, and the other end of the first X capacitances
It is connected with the other end of the 2nd X capacitances and forms the first node, the other end and the first node phase of the 3rd X capacitances
Connection；
One end of the 4th X capacitances is connected between third fire wire output end and the third output end of common mode inductance, shape
At the second node, one end of the 5th X capacitances is connected between the second fire wire output end and the second output terminal of common mode inductance,
Form third node, one end of the 6th X capacitances be connected to the first fire wire output end and common mode inductance the first output end it
Between, the 4th node is formed, and the other end of the 4th X capacitances and the other end of the 5th capacitance are connected and form the 5th knot
The other end of point, the 6th X capacitances is connected with the 5th node；
One end of first Y capacitance is connected with the 5th node, and the other end is connected to zero curve input terminal and zero curve
Between output end；
One end of first varistor is connected between the second node and third fire wire output end, and the other end passes through
One gas-discharge tube is connected between third node and the second fire wire output end；One end of second varistor is connected to
Between three nodes and the second fire wire output end, the other end is connected to the 4th node by second gas discharge tube and the first firewire is defeated
Between outlet；One end of the third varistor is connected between the 4th node and the first fire wire output end, and the other end passes through
Third gas discharge tube is connected between the second node and third fire wire output end.
Preferably, further include the first fuse and the second fuse, first fuse is connected in series in the second firewire
Between input terminal and the second input terminal of common mode inductance, second fuse is connected in series in third firewire input terminal and common mode
Between the third input terminal of inductance.
Preferably, the maximum current value that first fuse and the second fuse are born is 30A.
Preferably, the pressure sensitive voltage of first varistor, the second varistor and third varistor is 550V.
Preferably, the direct-current discharge electricity of the first gas discharge tube, second gas discharge tube and third gas discharge tube
Pressure is 1000V.
Preferably, the capacitance of the first X capacitances, the 2nd X capacitances and the 3rd X capacitances is 4.7 μ F.
Preferably, the capacitance of the 4th X capacitances, the 5th X capacitances and the 6th X capacitances is 2.2 μ F.
Preferably, the capacitance of first Y capacitance is 15nF.
A kind of frequency converter, including three phase converter circuit.
The utility model has the beneficial effects that：
Compared with prior art, three phase converter circuit and frequency converter described in the utility model, are not damaging product
In the case of can disposably be tested by surge test and varistor, and circuit structure is simple, low manufacture cost.
Description of the drawings
Fig. 1 is the circuit diagram schematic diagram of the utility model.
Reference numeral：1, the first firewire input terminal, the 2, second firewire input terminal, the 3, third firewire input terminal, 4, first fire
Line output terminal, the 5, second fire wire output end, 6, third fire wire output end, 7, zero curve input terminal, 8, zero line output end, 9, common mode electricity
Sense, the 10, the first X capacitances, the 11, the 2nd X capacitances, the 12, the 3rd X capacitances, the 13, the 4th X capacitances, the 14, the 5th X capacitances, the 15, the 6th X
Capacitance, the 16, first Y capacitance, the 17, first varistor, the 18, second varistor, 19, third varistor, 20, first gas
Discharge tube, 21, second gas discharge tube, 22, third gas discharge tube, the 23, first node, the 24, second node, 25, third knot
Point, the 26, the 4th node, the 27, the 5th node, the 28, first fuse, the 29, second fuse.
Specific implementation mode
Below in conjunction with the attached drawing of the utility model, the technical solution of the utility model embodiment is carried out clear, complete
Description.
A kind of revealed three phase converter circuit of the utility model and frequency converter, the case where not damaging frequency converter product
Under, frequency converter product can be made disposably to be tested by surge test and varistor.
As shown in Figure 1, a kind of three phase converter circuit, including the first firewire input terminal 1, the second firewire input terminal 2, third
Firewire input terminal 3, the first fire wire output end 4, the second fire wire output end 5, third fire wire output end 6, zero curve input terminal 7, zero curve
Output end 8, common mode inductance 9, the first X capacitances 10, the 2nd X capacitances 11, the 3rd X capacitances 12, the 4th X capacitances 13, the 5th X capacitances
14, the 6th X capacitances 15, the first Y capacitance 16, the first varistor 17, the second varistor 18, third varistor 19, first
Gas-discharge tube 20, second gas discharge tube 21, third gas discharge tube 22.
Specifically, common mode inductance 9 is for filtering out electromagnetic interference signal, there are three input terminal (first input end, second for tool
Input terminal and third input terminal) and three output ends (the first output end, second output terminal and third output end).Wherein, first
Input terminal is connected with the first firewire input terminal 1, and the first output end is connected with the first fire wire output end 4；Second input terminal with
Second firewire input terminal 2 is connected, and second output terminal is connected with the second fire wire output end 5；Third input terminal and third firewire
Input terminal 3 is connected, and third output end is connected with third fire wire output end 6.
Further, 10 to the 6th X capacitances 15 of the first X capacitances are used to filter.By the way that X electricity is added in firewire input terminal
Hold, can inhibit Conduction Interference.Likewise, X capacitances are added in 9 output end of common mode inductance, it can be used for the filtering of common mode inductance 9.The
One X capacitances, 10 to the 6th X capacitances 15 are safety capacitance.One end of first X capacitances 10 is connected to the first firewire input terminal 1 and is total to
Between the first input end of mould inductance 9, one end of the 2nd X capacitances 11 is connected to the second firewire input terminal 2 and common mode inductance 9
Between second input terminal, and the other end of the first X capacitances 10 is connected with the other end of the 2nd X capacitances 11 and forms the first node
23.One end of 3rd X capacitances 12 is connected between third firewire input terminal 3 and the third input terminal of common mode inductance, the other end with
First node 23 is connected.
In the present embodiment, the capacitance of the first X capacitances 10, the 2nd X capacitances 11 and the 3rd X capacitances 12 is to being 4.7 μ F.
Further, one end of the 4th X capacitances 13 is connected to third fire wire output end 6 and the third of common mode inductance 9 is defeated
Between outlet and form the second node 24, one end of the 5th X capacitances 14 is connected to the of the second fire wire output end 5 and common mode inductance
Between two output ends and third node 25 is formed, one end of the 6th X capacitances 15 is connected to the first fire wire output end 4 and common mode electricity
Between first output end of sense and the 4th node 26 is formed, and the other end of the 4th X capacitances 13 and the 5th X capacitances 14 is another
One end is connected and forms the 5th node 27, and the other end of the 6th X capacitances 15 is connected with the 5th node 27.
In the present embodiment, the capacitance of the 4th X capacitances 13, the 5th X capacitances 14 and the 6th X capacitances 15 is 2.2 μ F.
As shown in Figure 1, the first Y capacitance 16 is equally used for filtering, one end is connected with the 5th node 27, other end connection
Between zero curve input terminal 7 and zero line output end 8.Preferably, the capacitance of the first Y capacitances 16 is 15nF.
Compared with prior art, the first varistor 17 and first in three phase converter circuit described in the utility model
Gas-discharge tube 20 is connected in series with, and the second varistor 18 is connected in series with second gas discharge tube 21, third varistor 19
It is connected in series with third gas discharge tube 22.Power transformer product can pass through surge test in this manner, and can one
The test that secondary property passes through pass varistor.Specifically, one end of the first varistor 17 is connected to the second node 24 and third fire
Between line output terminal 6, the other end by first gas discharge tube 20 be connected to third node 25 and the second fire wire output end 5 it
Between；One end of second varistor 18 is connected between third node 25 and the second fire wire output end 5, and the other end passes through the second gas
Body discharge tube 21 is connected between the 4th node 26 and the first fire wire output end 4；One end of third varistor 19 is connected to
Between four nodes 26 and the first fire wire output end 4, the other end is connected to the second node 24 and by third gas discharge tube 22
Between three fire wire output ends 6.
In the present embodiment, since the rated operational voltage of power transformer product is in 380V~480V, and have 10% voltage
Domain of walker, then the maximum working voltage of transformer is 528V.Due to surge current requirements 10KA, then varistor is optional
The B72220S2551K101 of the V20E550P and EPCOS of Littlefuse.Wherein, the first varistor 17, the second pressure-sensitive electricity
The pressure sensitive voltage of resistance 18 and third varistor 19 is 550V.
Further, maximum working voltage is converted into direct current, then 528V*1.414=746V DC, according to the 60335- of UL
Test request in 2 is in short-circuit condition, then means after varistor short circuit when varistor works normally
The direct current crest voltage for having 746V is added to above gas-discharge tube by highest.Simultaneously, it is contemplated that circuit rear end needs work(to be protected
Rate device, if the pressure resistance of rectifier bridge is 1600V DC, so the gas-discharge tube of 1000V DC 10KA may be selected, such as
The B88069X3880T502 of the CG21000L and EPCOS of Littelfuse.In the present embodiment, first gas discharge tube 20, second
The DC disruptive voltage of gas-discharge tube 21 and third gas discharge tube 22 is 1000V.
As shown in Figure 1, three phase converter circuit further includes the first fuse 28 and the second fuse 29.Wherein, it first protects
Dangerous silk 28 is connected in series between the second firewire input terminal 2 and the second input terminal of common mode inductance 9, and second fuse 29 is gone here and there
Connection is connected between third firewire input terminal 3 and the third input terminal of common mode inductance 9.First fuse 28 and the second fuse
29 maximum current values born are 30A.
A kind of frequency converter, including three phase converter circuit described above.
The technology contents and technical characteristic of the utility model have revealed that as above, however those skilled in the art still may be used
Teaching and announcement that can be based on the utility model and make various replacements and modification without departing substantially from the spirit of the present invention, therefore, this
Utility model protection range should be not limited to the revealed content of embodiment, and should include the various replacements without departing substantially from the utility model
And modification, and covered by present patent application claim.
Claims (9)
1. a kind of three phase converter circuit, which is characterized in that including the first firewire input terminal, the second firewire input terminal, third fire
Line input terminal, the first fire wire output end, the second fire wire output end, third fire wire output end, zero curve input terminal, zero line output end,
Common mode inductance, the first X capacitances, the 2nd X capacitances, the 3rd X capacitances, the 4th X capacitances, the 5th X capacitances, the 6th X capacitances, the first Y electricity
Appearance, the first varistor, the second varistor, third varistor, first gas discharge tube, second gas discharge tube, third
Gas-discharge tube；
The first input end of the common mode inductance is connected with the first firewire input terminal, the first output end and the first fire wire output end
It is connected；Second input terminal of the common mode inductance is connected with the second firewire input terminal, and second output terminal and the second firewire are defeated
Outlet is connected；The third input terminal of the common mode inductance is connected with third firewire input terminal, third output end and third fire
Line output terminal is connected；
One end of the first X capacitances is connected between the first firewire input terminal and the first input end of common mode inductance, and described
One end of two X capacitances is connected between the second firewire input terminal and the second input terminal of common mode inductance, and the one of the 3rd X capacitances
End is connected between third firewire input terminal and the third input terminal of common mode inductance, and the other end of the first X capacitances and the
The other end of two X capacitances is connected and forms the first node, and the other end of the 3rd X capacitances is connected with first node
It connects；
One end of the 4th X capacitances is connected between third fire wire output end and the third output end of common mode inductance and forms
One end of two nodes, the 5th X capacitances is connected between the second fire wire output end and the second output terminal of common mode inductance and shape
At third node, one end of the 6th X capacitances is connected between the first fire wire output end and the first output end of common mode inductance
And the 4th node is formed, and the other end of the 4th X capacitances and the other end of the 5th X capacitances are connected and form the 5th knot
The other end of point, the 6th X capacitances is connected with the 5th node；
One end of first Y capacitance is connected with the 5th node, and the other end is connected to zero curve input terminal and zero line output
Between end；
One end of first varistor is connected between the second node and third fire wire output end, and the other end passes through the first gas
Body discharge tube is connected between third node and the second fire wire output end；One end of second varistor is connected to third knot
Between point and the second fire wire output end, the other end is connected to the 4th node and the first fire wire output end by second gas discharge tube
Between；One end of the third varistor is connected between the 4th node and the first fire wire output end, and the other end passes through third
Gas-discharge tube is connected between the second node and third fire wire output end.
2. three phase converter circuit according to claim 1, which is characterized in that the three phase converter circuit further includes
One fuse and the second fuse, first fuse are connected in series in the second firewire input terminal and the second of common mode inductance defeated
Between entering end, second fuse is connected in series between third firewire input terminal and the third input terminal of common mode inductance.
3. three phase converter circuit according to claim 2, which is characterized in that first fuse and the second fuse
The maximum current value born is 30A.
4. three phase converter circuit according to claim 1, which is characterized in that first varistor, second pressure-sensitive
The pressure sensitive voltage of resistance and third varistor is 550V.
5. three phase converter circuit according to claim 1, which is characterized in that the first gas discharge tube, the second gas
The DC disruptive voltage of body discharge tube and third gas discharge tube is 1000V.
6. three phase converter circuit according to claim 1, which is characterized in that the first X capacitances, the 2nd X capacitances and
The capacitance of 3rd X capacitances is 4.7 μ F.
7. three phase converter circuit according to claim 1, which is characterized in that the 4th X capacitances, the 5th X capacitances and
The capacitance of 6th X capacitances is 2.2 μ F.
8. three phase converter circuit according to claim 1, which is characterized in that the capacitance of first Y capacitance is
15nF。
9. a kind of frequency converter, which is characterized in that including the three phase converter circuit described in claim 1~8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820034745.3U CN207705774U (en) | 2018-01-09 | 2018-01-09 | A kind of three phase converter circuit and frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820034745.3U CN207705774U (en) | 2018-01-09 | 2018-01-09 | A kind of three phase converter circuit and frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207705774U true CN207705774U (en) | 2018-08-07 |
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ID=63034690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820034745.3U Active CN207705774U (en) | 2018-01-09 | 2018-01-09 | A kind of three phase converter circuit and frequency converter |
Country Status (1)
| Country | Link |
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| CN (1) | CN207705774U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111064165A (en) * | 2020-01-19 | 2020-04-24 | 珠海格力电器股份有限公司 | Protection circuit, frequency converter device and electrical equipment |
| WO2021147587A1 (en) * | 2020-01-20 | 2021-07-29 | 青岛海尔空调电子有限公司 | Surge absorbing circuit for three-phase air conditioning system |
-
2018
- 2018-01-09 CN CN201820034745.3U patent/CN207705774U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111064165A (en) * | 2020-01-19 | 2020-04-24 | 珠海格力电器股份有限公司 | Protection circuit, frequency converter device and electrical equipment |
| WO2021147587A1 (en) * | 2020-01-20 | 2021-07-29 | 青岛海尔空调电子有限公司 | Surge absorbing circuit for three-phase air conditioning system |
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