The topology of a three-level active neutral point clamped (3L-ANPC) converter with hybrid devices of SiC-MOSFET and Si-IGBT was taken as the research object to study the common-mode electromagnetic interference (CM EMI) characteristics in three pulse width modulation modes. First, two combination modes of SiC-MOSFET and Si-IGBT and three modulation modes of the 3L-ANPC converter topology were introduced. Then, the propagation mechanism of CM noise in the 3L-ANPC converter was analyzed. Based on the analysis, an EMI model including parasitic parameters and noise sources was established, and the impedance expression of propagation path in each modulation mode was derived, thereby obtaining the impedance characteristic curves of CM propagation paths. Finally, the conclusion about the CM noise of the 3L-ANPC converter with hybrid devices in three modulation modes was experimentally verified.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |