ST STEVAL-ISW001V1 User Manual Download Page 12 | Manualshive

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ST STEVAL-ISW001V1 User Manual Download Page 12

Safety and operating instructions

UM0933

12/16

Doc ID 17386 Rev 1

2.8

IGBT or power MOSFET compatibility

From laboratory tests and performance estimates on this application, the switches used on
the power section of the asymmetric forward converter can be IGBT or power MOSFET.
Only some small modifications to the value of the gate resistor must be carried out when
moving from IGBT to power MOSFET use. The demonstration board comes with an IGBT
STGW35HF60WD MDMesh

TM

II family device, and for this reason, on the electric

schematic, the graphic symbol is related to this kind of switch.

In terms of power MOSFET, the suggested part to be fitted to the application is the new
STW77N65M5 device.

www.BDTIC.com/ST

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Summary of Contents for STEVAL-ISW001V1

Page 1: ...where the robustness efficiency of the silicon part is the key point for a reliable system The whole system is made up of two boards A power board where all the power devices involved in the power co...

Page 2: ...allation 5 2 2 1 Electronic connection 6 2 2 2 2 5 kW 135 A welding machine demonstration setup 6 2 3 Hardware layout 7 2 4 Environmental and equipment considerations 8 2 5 2 5 kW 135 A welding machin...

Page 3: ...3 16 List of figures Figure 1 Typical low end welding machine topology 1 Figure 2 2 5 kW 135 A welding machine STEVAL ISW001V1 top view 7 Figure 3 Power board schematic diagram 13 Figure 4 Control bo...

Page 4: ...er delivered and the current level present on many parts of the board Also the rectangular shape of the board and the position of the magnetic silicon devices were considered in order to guarantee a s...

Page 5: ...ed only in a power laboratory and only by engineers and technicians who are experienced in power electronics technology and under the proper protection STMicroelectronics is not responsible for the sa...

Page 6: ...From this assuming a welding current of 100 A is imposed the output of the system is about 24 V The calculation of the equivalent resistive dummy load is Equation 1 A resistor capable of dissipating t...

Page 7: ...to the temperature that the load could reach The required equipment must be provided in order to avoid hot surfaces and fire risk during the tests fan water cooled load etc Note Do not touch the board...

Page 8: ...testing on a resistive dissipative dummy load the STEVAL ISW001V1 must only be used in a power laboratory equipped with a ventilation system or smoke extractor fan system The high voltage involved in...

Page 9: ...in the range between 185 Vrms to 265 Vrms or with a DC voltage between 310 Vdc and 375 Vdc The power source must be able to supply the power required by the system according to the welding current set...

Page 10: ...een implemented The current on the primary side of the insulation transformer measured by the current transformer on the power board after a partition through R48 and R49 is connected to pin 6 Pin 6 C...

Page 11: ...tion can be obtained by acquiring the voltage reflected to the output inductor and integrating this information For a more detailed explanation and mathematical model see the AN3200 application note d...

Page 12: ...be IGBT or power MOSFET Only some small modifications to the value of the gate resistor must be carried out when moving from IGBT to power MOSFET use The demonstration board comes with an IGBT STGW35H...

Page 13: ...U 0 9 3 U 0 9 3 2 2 U 6 U 6 3 6 6 4 6 54 6 N 9 N 9 N V N V 2 2 7 2 2 7 U 0OLIESTERE U 0OLIESTERE 1 34 7 7 1 34 7 7 K 2 K 2 3403 7 3403 7 48 MAGNETICA 48 MAGNETICA X X X Y Y Y 2 OHM W 2 OHM W 0ROBLE U...

Page 14: ...INV COMP NONINV COMP 6CC NONINV OP INV OP OUT OP 6REF ATHODE OUT OP INV OP NONINV OP 6CC NONINV COMP INV COMP OUT COMP 2 K 2 K 2 K 2 K 2 K 2 K 2 K 2 K 2 K 2 K 3 3 SYNC OSC OUT 4 24 3 3OFT START COMP...

Page 15: ...UM0933 Revision history Doc ID 17386 Rev 1 15 16 4 Revision history Table 1 Document revision history Date Revision Changes 07 Sep 2010 1 Initial release www BDTIC com ST...

Page 16: ...OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRES...

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