CN201233799Y - Rectifying transformer - Google Patents
Rectifying transformer Download PDFInfo
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- CN201233799Y CN201233799Y CNU2008201095901U CN200820109590U CN201233799Y CN 201233799 Y CN201233799 Y CN 201233799Y CN U2008201095901 U CNU2008201095901 U CN U2008201095901U CN 200820109590 U CN200820109590 U CN 200820109590U CN 201233799 Y CN201233799 Y CN 201233799Y
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Abstract
A rectifying transformer relates to a high power rectifying transformer with the use frequency of more than or equal to 2 kHZ. The high power rectifying transformer comprises a transformer core 1.1, a primary coil 1.2, a secondary coil 1.3 and a rectifying tube circuit connected with the output end of the primary coil of the transformer. The high power rectifying is characterized in that the proportion of the width to the height of the working cross section of the iron core is no less than 5:1 and is no more than 50:1, only a layer of primary coil and a loop of secondary coil are wound on the transformer core, and a water cooling radiator 2 for the cooling transformer is arranged outside the transformer. The utility model solves the defects of the high power water cooling or oil-immersed transformers such as complicated manufacturing process and low operation frequency; and although the temperature is reduced by using the water cooling radiator, the high power rectifying transformer still has a dry type transformer structure. The transformer has the advantages of high operation frequency, large output power, simple manufacture process, and the like.
Description
Technical field
The utility model belongs to the medium-high frequency field transformer, relates generally to the power rectifier transformer that the transformer frequency of utilization is not less than 2kHz.
Background technology
At present, in order to adapt to economical with materials and energy-conservation needs, transformer technology is to high frequencyization, and the low-voltage direction develops.But when frequency improved, the outputting inductance of transformer had limited output current.When output voltage was low more, output current was big more, and foregoing problems is just outstanding all the more.In addition, under high-power output condition,, need to consider the transformer heat dissipation problem for improving service efficiency.High-power transformer can adopt water cooling or oil cooling but at present.Existing water cooling technology is made hollow to transformer coil, inner logical recirculated cooling water.For guaranteeing transformer turn-to-turn insulation, in manufacturing process, need casting epoxy resin.Water-cooled transformer is complex manufacturing technology not only, owing to the dielectric loss that epoxy resin causes, has also limited the frequency of utilization of transformer.Oil cooled transformer is that transformer core is immersed in the oil.This transformer needs good sealing, and cost of manufacture is also very high, and under the high-frequency condition, the dielectric loss of insulating oil has limited the frequency of utilization of transformer equally.
Summary of the invention
The purpose of this utility model is to provide a kind of manufacture craft simple, and good heat dissipation effect, transformer frequency of utilization are not less than the power rectifier transformer of 2kHz.
The technical solution of the utility model is referring to rectifier transformer assembling schematic diagram 1 and Fig. 9.This rectifier transformer is to adopt conventional method to determine that wherein the working sections of transformer core is long-pending, the sectional area of primary coil and secondary coil; It includes transformer core 1.1, primary coil 1.2, secondary coil 1.3, reaches the valve tube circuit that is connected with the transformer secondary output coil output.The invention is characterized in:
The width of the working sections of described iron core is not less than 5 to 1 with the ratio of height, is not more than 50 to 1, and the ratio optimal selection of the width of the working sections of iron core and height is not more than 20 to 1 for being not less than 10 to 1; Transformer fe of the present utility model is only twined an one deck primary coil and a circle secondary coil in the heart, and the transformer outer setting has the water-filled radiator 2 of cooling transformer.
Described transformer core 1.1 places in the middle of the water-filled radiator 2 of two cooling transformers, and makes the transformer fe core outer surface contact each water-cooled transformer outer surface, and the secondary coil 1.2 of transformer places respectively on the water-filled radiator of two cooling transformers.Also can the water-filled radiator 4 that cool off rectifying tube be set again in two water-filled radiators, 2 positions middle, that place the secondary coil 1.2 of transformer, rectifying tube is installed on the water-filled radiator 4 of cooling rectifying tube.
The secondary coil output of described transformer with valve tube circuit 3 connected modes is: two outputs of the secondary coil of transformer directly are connected the rectifying tube in the rectification circuit; Or the rectifying tube in the termination rectification circuit of the secondary coil of transformer, another termination load.
When a kind of rectifier transformer described in the utility model uses, can adopt a plurality of transformer combinations to use according to the instructions for use of on-the-spot load to transformer output voltage or output current.
Connected mode when described a plurality of transformer combination is used is: when single transformer output current is lower than load request, a plurality of rectifier transformer primary coil series connection back is connected with alternating current, be connected with load after the parallel connection of rectifier transformer output, perhaps be connected with rectification circuit behind the parallel connection of secondary windings; When single transformer output voltage is lower than load request, be connected with alternating current behind the primary coil serial or parallel connection with a plurality of rectifier transformers, rectifier transformer output series connection back is connected with load, and perhaps secondary coil series connection back is connected with rectification circuit.
The purpose of this utility model is to reach by changing the transformer shape and the type of cooling.Because transformer core is made and made flat, the width in its cross section is not less than 5 to 1 with the ratio of height, is not more than 50 to 1, reduces so that be exposed to the outer lead of magnetic circuit, has reduced leakage flux.Moreover only twine one deck primary coil in the heart in transformer fe, and transformer core length is increased, highly reduction has reduced the distributed inductance that lead causes; Simultaneously only twine a circle secondary coil in the heart, and surround the primary coil winding, reduced transformer leakage inductance in transformer fe; Remove because core length increases, outside the width of this circle secondary coil also broadened with the core length increase, design can reduce the distributed inductance that winding wire causes like this, and its principle is similar to flat transmission line.
The utility model adopts the water-filled radiator cooling transformer in order to improve cooling effectiveness and transformer operating frequency, reduces the temperature rise that is caused by transformer loss.Water-filled radiator reaches cooling purpose by closely contacting with transformer, compares with existing oil-immersed type transformer or water-cooled transformer, owing to have thermal resistance between transformer and radiator, the radiating efficiency of this water-filled radiator is not as preceding two kinds theoretically.But amass greatly because the characteristics of our transformer shape are upper and lower surfaces unshakable in one's determination, the secondary coil width is big, makes that transformer and water-filled radiator contact area are big, helps reducing thermal resistance, improves radiating efficiency.Using the advantage of water-filled radiator is that transformer remains dry-type transformer, does not have the dielectric loss of existing water-cooled transformer and oil-immersed type transformer, helps improving frequency.
In sum, the utility model is compared with dry-type transformer, has improved radiating efficiency.Compare with water-cooled or oil-immersed type transformer, improved the operating frequency of high-power transformer, simplified the manufacture craft of transformer.
Description of drawings
Fig. 1 rectifier transformer assembling of the present utility model schematic diagram
Among the figure: 1.1 transformer cores, the secondary coil of 1.2 transformers; 1.3 transformer; 1.4 the output bus bar plate 2 of secondary coil, the water-filled radiator of cooling transformer;
Fig. 2 transformer 1.1 iron cores of the present utility model.
Among the figure: W iron core width, h iron core working sections height H w core window height L core length Lw; Core window length H iron core height;
Fig. 3 rectifier transformer coil arrangement is implemented illustration
The radiator of Fig. 4 cooling transformer.
Among the figure: the length G pipe rib-loop of the wide Lt water-filled radiator contact of the height Wc water-filled radiator core side of the height H s water-filled radiator contact second coil side of the long Ht water-filled radiator contact of Lc water-filled radiator core side;
The circuit interconnect pattern that Fig. 5 rectifier transformer is connected with valve tube circuit
Among the figure: 3 valve tube circuits, 3.1 rectifier diodes;
The circuit interconnect pattern that the another kind of rectifier transformer of Fig. 6 is connected with valve tube circuit;
Fig. 7 is provided with the rectifier transformer assembling schematic diagram of the water-filled radiator of cooling rectifying tube
Among the figure: 4, the water-filled radiator of cooling rectifying tube;
Fig. 8, another kind are provided with the rectifier transformer assembling schematic diagram of the water-filled radiator of cooling rectifying tube;
Fig. 9 is the assembling schematic diagram the when rectifier transformer among two Fig. 7 is used in combination
Among the figure: 5, insulation board;
When Figure 10 rectifier transformer is used in combination, with the series connection of rectifier transformer primary coil, the circuit theory schematic diagram that is connected with load after the parallel connection of current-doubling rectifier output
Among the figure: the inductance of 6 current-doubling rectifiers;
When Figure 11 rectifier transformer is used in combination, with the series connection of rectifier transformer primary coil, the circuit theory schematic diagram of two parallel connection of secondary windings;
When Figure 12 rectifier transformer is used in combination, with the series connection of rectifier transformer primary coil, the circuit diagram of two secondary coil series connection;
Figure 13, when rectifier transformer is used in combination, with the rectifier transformer parallel connection of primary windings, the circuit diagram of two secondary coil series connection.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
The enforcement of carrying out according to Fig. 1 is: for reducing the temperature rise that causes owing to copper loss, two outputs of the secondary coil 1.2 of transformer closely are connected with two water-filled radiators 2 respectively, and utilize the output bus bar plate 1.4 of secondary coil that secondary coil 1.2 is pressed on the water-filled radiator 2 by bolt.Because primary coil only twines one deck on transformer core 1.1, make transformer core length increase, highly reduce, the width of secondary coil 1.2 increases.This design not only can reduce the transformer outputting inductance, also makes water-filled radiator 2 bigger contact-making surface to be arranged with transformer core 1.1 and secondary coil 1.2, helps improving the radiating efficiency of water-filled radiator.
Carrying out the design of transformer core according to Fig. 2, below is the embodiment of several iron cores:
Example 1:W=80; H=4; Hw=8; L=181; Lw=173; H=30.
Example 2:W=50; H=9; Hw=6; L=207; Lw=200; H=32.
Example 3:W=100; H=2; Hw=6; L=150; Lw=148; H=20.
Example 4:W=80; H=8; Hw=6; L=181; Lw=173; H=34.Unit is millimeter.
The iron core characteristics are among the design, and working sections the ratio of width to height unshakable in one's determination is big, and example 1 is 20 to 1.Owing to require primary coil only on iron core, to twine one deck, make that another characteristics unshakable in one's determination are that the transformer length of window is big, this embodiment Lw value is 173 millimeters.This window can adopt wide 160 millimeters copper strips to do secondary coil down, and this kind transformer device structure not only can reduce transformer leakage inductance, also helps the transformer heat radiation.The secondary coil of transformer is made by 10 layers of Copper Foil of 0.2 millimeter of wide 160 millimeters thick in this example.Primary coil twines one deck 36 circles on iron core.
Example 2 iron core working sections are wide 50 millimeters, and are high 9 millimeters.Long 200 millimeters of window unshakable in one's determination.Width is 50 to 9 with the ratio of height.Because the width of the working sections of transformer exerts an influence with the high frequency performance of the comparison transformer of height, so require the width of transformer and the ratio of height must not be less than 5 to 1.
Example 3 selected transformer core design sizes are: W=100; H=2; Hw=6; L=150; Lw=148; H=20. unit is a millimeter. this routine iron core working sections is wide 100 millimeters, and is high 2 millimeters.Long 148 millimeters of window unshakable in one's determination.Width is 50 to 1 with the ratio of height.
Example 4 selected width are 10 to 1 with the ratio of height.
More than the ratio of width to height of several routine iron cores be respectively: 20 to 1; 50 to 9; 50 to 1; 10 to 1.The ratio of width to height commonly used is 20 to 1 to 10 to 1.
Fig. 3 is to use the legend that iron core is arranged primary coil and secondary coil in Fig. 2 example 1.Transformer 1.3 has 18 circles in this example; Secondary coil 1.2 is made by 10 layers of Copper Foil of 0.2 millimeter of wide 160 millimeters thick.Transformer is with wide 8 millimeters, and 10 layers of thick 0.2 millimeter thin copper belt are made.Show transformer among the figure at iron core Shangrao one deck, secondary coil surrounds primary coil around a circle.
Design the radiator of cooling transformer according to Fig. 4, be of a size of among the embodiment: Lc=220, Ht=38, Hs=17, Wc=181, Lt=90; Above unit is a millimeter.The pipe rib-loop G=1/4 of water nozzle place, unit is an inch.Be the schematic diagram of the radiator 2 that adopts among Fig. 1 shown in the figure, during use at gas thread G place by the dress water nozzle, recirculated water flows to outflow through water nozzle.Radiator and transformer core 1.1, the face of secondary coil 1.2 contacts will mill flat, so that reduce thermal resistance.18 holes on figure surface are bolts hole, are used for secondary coil 1.2 is pressed on the surface of water-filled radiator 2.Obviously, secondary coil is under the prerequisite that sectional area is determined, its cross section is wide more, and also big more with the contact area of radiator, radiating efficiency is also high more.Use the process of this radiator cooling to be: the heat that secondary coil produces is passed to radiator, the heat of radiator is taken away by recirculated cooling water again.The mode of this water-cooling belongs to indirect water-cooling, though make transformer still keep the structure of dry-type transformer, utilizes the big raising radiating efficiency of contact area of radiator and secondary coil.Radiator can be selected the good material of heat conduction for use, as aluminium alloy or copper alloy.
The utility model can according to Fig. 5 with transformer with can be used for doubly flowing full-wave rectifying circuit or half-wave rectifying circuit after valve tube circuit is connected.As being used for doubly flowing full-wave rectifying circuit, A point and C point connect the inductance in the current-doubling rectifier, an end of B termination load, the common port of another termination inductance of load among the figure.As be used for half-wave rectifying circuit, an end of A termination load, B termination inductance, the other end of another termination load of inductance.
Also can according to Fig. 6 with transformer be used for center-tap rectifier circuit after valve tube circuit is connected.Because centre tap circuit will be with two secondary coils, therefore two Fig. 6 circuit just can be built a center-tap rectifier circuit, the primary coil series connection back that is about to each transformer among Fig. 6 is connected with alternating current, and two secondary coils connect according to center-tap rectifier circuit.
Transformer valve tube circuit among above Fig. 5 and Fig. 6 rectification circuit different with connecting and composing of external circuit belongs to known knowledge.
Schematic diagram 7 and 8 are seen in the rectifier transformer assembling that is provided with the water-filled radiator of cooling rectifying tube in the utility model.
Fig. 7 is the parts assembling schematic diagram that the transformer of Fig. 1 is coupled together according to Fig. 5 and valve tube circuit.The two ends of the secondary coil 1.2 of transformer are connected with the anode of two rectifying tube diodes 3.1 respectively, and 3.1 adopt the common cathode diode, and its minus plate is installed on the water-filled radiator 4 of rectifier diode; 4 also is the common cathode of two rectifier diodes.The outer surface of transformer core 1.1 should insulate for water-filled radiator 2.Use bolt with diode anode, secondary coil output bus bar plate, secondary coil 1.2, water-filled radiator 2 closely couples together.This example adopts the transformer of Fig. 2 example 1, is used for resistance welding power source, output current 8kA, arcing time factor 40%, operating frequency 20kHz.
Fig. 8 is the parts assembling schematic diagram that the transformer of Fig. 1 is coupled together according to Fig. 6 and valve tube circuit.The anode of the transformer secondary output coil 1.2 1 termination rectifier diodes 3.1 among Fig. 8.3.1 adopt the common cathode diode, its minus plate is installed on the water-filled radiator 4 of rectifier diode, 4 also is the common cathode of rectifier diode.Secondary coil 1.2 other ends are the A ends among Fig. 6.Use two parts shown in Figure 8 can assemble a twin coil centre cap formula rectification circuit.
Fig. 9 is the embodiment that two Fig. 7 unit constructions are assembled together.The iron core of transformer adopting Fig. 2 example 1 of Fig. 7 adopts the coiling of Fig. 3 example.Be used for the unicoil current-doubling rectifier.Get access to grid after the primary coil series connection of the transformer in two Fig. 7 parts, the output of secondary coil and external inductors are connected into two current-doubling rectifiers, connect load after the output parallel connection of two current-doubling rectifiers.This example is used for resistance welding power source, output current 15kA, and arcing time factor 40%, this routine circuit catenation principle of operating frequency 20kHz. is seen Figure 10.
Because transformer secondary has only a circle coil, when the electric current of this circle coil output, when voltage does not satisfy load request, just to press knownly, the series and parallel principle of power supply is handled this class problem.Promptly two power supply series connection back output voltages double, and output current doubles after two power supply parallel connections.
How in parallel Figure 10 embodiment represents when electric current that single transformer provides is lower than the electric current of load needs, use a plurality of rectifier transformers. E end and F termination electrical network among the figure; B end and D termination valve tube circuit.
Figure 11 embodiment is connected with valve tube circuit after representing also can adopt parallel connection of secondary windings when electric current that single transformer provides is lower than the electric current of load needs again, and effect is identical.Two primary coil series connection backs are connected with alternating current with the F end by the E end among the figure; The A end of two secondary coils is connected with valve tube circuit with C end back in parallel.
Figure 12 embodiment represents that when voltage that single transformer provides is lower than the load required voltage two primary coils series connection backs are by E end and F termination alternating current among the figure; The A end of two secondary coils is connected with valve tube circuit with C end series connection back.，
The difference of Figure 13 and Figure 12 is to be connected with alternating current behind the parallel connection of primary windings of transformer.
Above Figure 10 to Figure 13 has provided the method for designing that a plurality of rectifier transformers are used in combination.
It should be noted that at last: above embodiment only in order to the explanation technical solution of the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1, a kind of rectifier transformer, be to adopt conventional method to determine that wherein the working sections of transformer core is long-pending, the sectional area of primary coil and secondary coil, it includes transformer core (1.1), primary coil (1.2), secondary coil (1.3), and the valve tube circuit that is connected with the transformer secondary output coil output, the invention is characterized in: the width of the working sections of described iron core is not less than 5 to 1 with the ratio of height, be not more than 50 to 1, transformer fe is only twined an one deck primary coil and a circle secondary coil in the heart, and the transformer outer setting has the water-filled radiator (2) of cooling transformer.
2, a kind of rectifier transformer according to claim 1 is characterized in that: the ratio optimal selection of the width of the working sections of described iron core and height is not more than 20 to 1 for being not less than 10 to 1.
3, a kind of rectifier transformer according to claim 1 and 2, it is characterized in that: described transformer core places in the middle of the water-filled radiator of two cooling transformers, and making the transformer fe core outer surface contact the outer surface of each water-cooled transformer, the secondary coil of transformer places respectively on the water-filled radiator of two cooling transformers.
4, a kind of rectifier transformer according to claim 3, it is characterized in that: in the middle of two water-filled radiators, the position of placing the secondary coil of transformer is provided with the water-filled radiator (4) of cooling rectifying tube again, rectifying tube is installed on the water-filled radiator (4) of cooling rectifying tube.
5, a kind of rectifier transformer according to claim 1 and 2 is characterized in that: the secondary coil output of described transformer with valve tube circuit (3) connected mode is: two outputs of the secondary coil of transformer directly are connected the rectifying tube in the rectification circuit; Or the rectifying tube in the termination rectification circuit of the secondary coil of transformer, another termination load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201095901U CN201233799Y (en) | 2008-08-01 | 2008-08-01 | Rectifying transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201095901U CN201233799Y (en) | 2008-08-01 | 2008-08-01 | Rectifying transformer |
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| Publication Number | Publication Date |
|---|---|
| CN201233799Y true CN201233799Y (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201095901U Expired - Fee Related CN201233799Y (en) | 2008-08-01 | 2008-08-01 | Rectifying transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409141B (en) * | 2008-08-01 | 2010-11-17 | 北京工业大学 | Rectifier transformer and use method thereof |
| CN112820515A (en) * | 2021-01-08 | 2021-05-18 | 合肥三宇电器有限责任公司 | Power supply device for low-voltage large current |
-
2008
- 2008-08-01 CN CNU2008201095901U patent/CN201233799Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409141B (en) * | 2008-08-01 | 2010-11-17 | 北京工业大学 | Rectifier transformer and use method thereof |
| CN112820515A (en) * | 2021-01-08 | 2021-05-18 | 合肥三宇电器有限责任公司 | Power supply device for low-voltage large current |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20100801 |