System Design; Emi Filter And Soft Power-Up Circuit; Inverter Section Using Cipos™ Mini Ipm - Infineon iMotion EVAL-M1-IM523 User Manual

EVAL-M1-IM523 user guide
iMotionTM modular application design kit

System design

3 System design
The EVAL-M1-IM523 board is an optimized design for 220 V small home appliances like air conditioners, pumps,
and fan applications. To meet individual customer requirements, and to make the EVAL-M1-IM523 evaluation
design a basis for development or modification, all board design data such as schematics, Gerber, and AD files
can be found on Infineon's website.
3.1

EMI filter and soft power-up circuit

Figure 12 shows the schematic from the AC input connector X1 to the rectified DC bus voltage. This circuitry
includes a passive EMI filter consisting of elements X, Y capacitors and common-mode inductor, a 10 A/600 V
rectifier bridge D3 (GBJ1006-BP), an F1 fuse for circuit protection, a PTC resistor, and an RY1 relay for soft
power-up and reduction of conduction losses in steady state.
Figure 12 Schematics for EMI filter and a soft power-up circuit
3.2 Inverter section using CIPOS™ Mini IPM
The inverter section is implemented using the CIPOS™ Mini IPM as shown in Figure 13. The module includes a
combination of an optimized reverse-conducting IGBT Gen 2 (RCD2), and industry-benchmark, robust half-
bridge drivers. The shunt resistor section is also provided in the inverter section, including 10 mΩ RS1 resistors.
The overcurrent level can be set up by using an OPAMP. The three capacitors C3, C6, and C8 are used as
bootstrap capacitors to provide the necessary floating supply voltages VBS1, VBS2, and VBS3, respectively.
15 Revision 1.00
2023-01-16