[introduction] in recent years, to come true better rich can be used continuously, need more and energy-saving product, accordingly, about solder function effect mandatory provide arise at the historic moment. Via improvement carborundum CoolSiC? MOSFET 1200 V uses the TO-247 that is based on technology of.XT diffusion welding to enclose, its blame convention is enclosed and hot design method rose through improved design can effect and power density.

“Foreword “

In recent years, to come true better rich can be used continuously, need more and energy-saving product, accordingly, about solder function effect mandatory provide arise at the historic moment. Via improvement carborundum CoolSiC? MOSFET 1200 V uses the TO-247 that is based on technology of.XT diffusion welding to enclose, its blame convention is enclosed and hot design method rose through improved design can effect and power density.

Civil: Ying Feiling science and technology is advanced applied engineer Jorge Cerezo

Inversion welder is to pass power module solution to design implementation to output power higher normally, help the cost that reduces energy-saving welder, weight and measure thereby [1] .

In welder industry, such as improves efficiency, reduce cost and enhance portable sex (namely, narrow measure reduces weight) waiting for a trend is to promote the impetus that develops continuously all the time. For example, many standards code already or the power source efficiency that is about to provide welder compulsively reachs specific level. Among them an example is, on January 1, 2023 of become effective in the light of solder the European Union of equipment (EU) newest code [2] . Accordingly, the 10kW that serves as typical solution to using power module comes power welder waits in 40kW, comply with these trends to already became very difficult now.

Ying Feiling CoolSiC MOSFET 1200 V uses the TO-247 that is based on technology of.XT diffusion welding to enclose, promoted the heat of parts of an apparatus function and reliability greatly. The cooling design with specific union (” come loose to increase hot, sheet of parts of an apparatus the canal is stuck directly outfit go up in carbon fin, and did not undertake any electric segregation ” [3] ) , it offerred sheet of more outstanding parts of an apparatus to provide a solution (graph 1) . It can come true to output power higher, increase efficiency and power density, the cost of welder of the power in be being reduced.

Graph 1: Use the welder power source that the sheet of 1200 V CoolSiC MOSFET that did not keep apart with carbon fin provides

The CoolSiC MOSFET sheet that uses technology of.XT diffusion welding is in charge of

Increase model what CoolSiC MOSFET 1200 V made full use of to be based on technology of diffusion welding of Ying Feiling.XT is improved model TO-247 is enclosed. This technology uses advanced diffusion welding technology. Be like [the place in 4] makes bat around, this kind of main good point that encloses a technology is to be reduced considerably solder the ply of the layer (graph 2) , among them, specific metallic alloy union can raise heat conduction rate significantly. The tie that this one character reduced parts of an apparatus – housing thermal resistance (Rthj-case) fight with thermal resistance (Zthj-case) .

This kind solders craft can prevent chip deflective spill over with solder, come true to receive an interface without interstitial solder almost, raise the dependability of parts of an apparatus thereby. In addition, it raised parts of an apparatus to be in hot – the function below mechanical stress, this means parts of an apparatus to be in check actively with passive hot loop more excellent performance is had below the condition. As a whole, use the CoolSiC MOSFET 1200 V that the TO-247 that is based on technology of.XT diffusion welding encloses, the hot property that can make implementation of design of welder power source better and dependability.

Graph 2: Technology of diffusion welding of Ying Feiling.XT than at craft of groovy soft soldering

The inverter of power source of 500 A welder that uses pipe of sheet of CoolSiC MOSFET parts of an apparatus is designed

The welder of a large manufacturer, design of its unique inverter of 500 A power source reveals the CoolSiC MOSFET 1200 V that is based on TO-247 of technology of.XT diffusion welding to enclose, those who be used at medium power welder is improved model solution. It used the cooling idea that preamble discusses, if the graph is shown 1 times, parts of an apparatus is stuck outfit go up in carbon fin and do not undertake electric segregation. In addition, have better performance to confirm its, in same test the condition falls, undertook the SiC MOSFET of its and main competitor contrast.

Welder power source is inputted by a three-phase, complete bridge develop attacks inverter is formed, do 4 TO-247 4 that used Ying Feiling to offer bring what the foot encloses to be based on.XT to interrelate technology (IMZA120R020M1H) 20 M? 1200 V CoolSiC MOSFET.

Express the 1 basic technology standards that listed inversion solders:

Express 1: Inverter of welder power source is basic technical standards

Ask an attention, the solution of typical IGBT module that compares the place of medium power welder that at coming in 10kHz come off work of 20kHz switch frequency makes to use, the freeboard switch rate of SiC MOSFET can rise frequency of typical job switch significantly. This conduces to the dimension of contractible and magnetic component and passive parts of an apparatus, narrow thereby inverter dimension.

In addition, to satisfy a watch a row asks, chose proper carbon fin and empty air current, in order to offer proper hot time constant. All carbon fin all obtain condition of hot stable state after about 5 minutes, cooling system design also obtains condition of hot stable state subsequently (graph 3) . Come so, in the biggest service requirement 60% solder occupy sky comparing inside, siC MOSFET parts of an apparatus already obtained condition of hot stable state namely.

Graph 3: The condition of hot stable state of radiator and medicinal powder heat energy force

Power source inverter checks a condition to be as follows:

• – output power: 408 A, 47.7 V, ~19.5 KW. The target outputs power: 20 KW, 500 A, 40 V

• – lead continuously: 60% , 6 minutes leave, 4 minutes close

• – voltage of inverter DC generatrix: 530 VDC

• – switch frequency: 50 KHz

• – VGS (20 M? CoolSiC MOSFET) : 18/-3 V

• – VGS (does contest taste 20 M? SiC MOSFET) : 20/-4 V

• – Rth of low margin carbon fin: ~0.36 K/W

• – Rth of high margin carbon fin: ~0.22 K/W

• – heat conduction creams heat conduction leads: 6.0 W/mK

• – stick outfit clip to hold power: 60 N (13.5 pounds)

• – environmental temperature: Room temperature

• – compulsive air is cool

• – RCL is laden

No less than anticipates in that way, because bumper of proper grid driver, RC and PCB layout are designed, ying Feiling CoolSiC MOSFET and contest are tasted there is notable difference between SiC MOSFET, both shows similar undee performance (graph 4) .

Graph 4: The typical SiC MOSFET during inverter of welder power source works is undee

However, medicinal powder heat and result of power loss test make clear, the performance of CoolSiC MOSFET is more excellent. Temperature graph (graph 5) show, 20 M? Apparent excel contest tastes the function of IMZA120R020M1H CoolSiC MOSFET parts of an apparatus. Average and character, taste parts of an apparatus than Yu Jing, the carbon fin temperature of CoolSiC MOSFET was reduced about 6% , estimated power loss was reduced 17% , housing Wen Jiang became low 14% .

In addition, coolSiC MOSFET obtains condition of hot stable state namely after moving 5 minutes, accord with those who be based on cooling design data to predict. On the other hand, contest tastes SiC MOSFET to did not obtain condition of hot stable state all the time, after this means its power loss to move 6 minutes in the system, still increasing.

Graph 5: 20 M? 1200 V SiC MOSFET is in 60% solder below status of job of direct current source medicinal powder heat and power loss — Ying Feiling CoolSiC MOSFET IMZA120R020M1H than the parts of an apparatus at main competitor

Finally, even if consider highest temperature of environment of 40 ° C, sheet of this kind of SiC MOSFET is in charge of a solution to also can be satisfied easily highest requirement of temperature of carbon fin of 80 ° C.

Altogether, the test confirms as a result and prove, coolSiC MOSFET sheet is in charge of a solution to stick parts of an apparatus directly through using fit the cooling idea that go up in carbon fin and does not have electric segregation, the inverter of welder of the power in the 20 KW that can aid force to come true to choose power module solution normally and above is designed.

Epilogue

The test confirms, use the CoolSiC MOSFET 1200 V that the TO-247 that is based on technology of.XT diffusion welding encloses, combine refrigeration of famous and special rule to design, realize more outstanding welder power source. This kind of design rose to come loose greatly hot property, implementation outputs power level higher than power module solution. Ying Feiling.XT interrelates technical advantage, conduce to rise medicinal powder hot property, improve the dependability of inverter and service life thereby. The sheet that offers in article is in charge of a solution to be able to come true more efficient with power density, the help satisfies the requirement of welder of pair of more high-energy effect, comply with welder industry to develop a tendency at the same time, if reduce cost, weight and size.

Reference material

[1] the article is an author (Jorge Cerezo) the paper that publishs in Nuremberg PCIM Europe 2022 ” use be based on.XT to interrelate canal of sheet of 1200 V CoolSiC MOSFET improves welder power efficiency ” replace edition. Https://pcim.mesago.com/nuernberg/en.html

[The 2] requirement according to European parliament and board statement 2009/125/EC, european Union committee (EU) 2019/1784 is aimed at at setting on October 1, 2019 solder the zoology of equipment designs a requirement.

[3] ” canal of TO-247PLUS IGBT sheet aids force to rise solder equipment power density ” , AN2019-10, joint-stock company of Ying Feiling science and technology.

[4] M. Holz, J. Hilsenbeck, R. Otremba, A. Heinrich, P. T ü Rkes, R. The write in collaboration with such as Rupp ” SiC power parts of an apparatus: Technology of use diffusion welding improves a product ” , materials Science Forum, 615-617 coils (2009) 613-616 page.

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