AT-NPC Module Switching Pattern (Three Phase) Fuji Electric Co., Ltd. Device Application Technology Dept. Semiconductor Div. Sales Group Mar, 2015 MT5F28646b © Fuji Electric Co., Ltd. All rights reserved. 1 3-phase 3-level Circuit (AT-NPC) Vu Vv Vu Vw Vv Vw MT5F28646b © Fuji Electric Co., Ltd. All rights reserved. 2 3-phase 3-level Circuit u E Vuv v Vu Vv w E MT5F28646b © Fuji Electric Co., Ltd. All rights reserved. 3 Output Line-to-Line Voltage Phase voltage +E Vu 0 u -E Phase voltage Vv +E Vuv 120o Vu 0 -E v Vv w +2E Line-to-line voltage V +E uv 0 (= Vu – Vv) -E -2E MT5F28646b © Fuji Electric Co., Ltd. All rights reserved. 4 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW 0 -E 0 Iu Iv Iw RB-FW -IGBT RB-FW © Fuji Electric Co., Ltd. All rights reserved. 5 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW 0 -E +E Iu Iv Iw RB-FW -IGBT +IGBT © Fuji Electric Co., Ltd. All rights reserved. 6 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E -E +E Iu Iv Iw +FWD -IGBT +IGBT © Fuji Electric Co., Ltd. All rights reserved. 7 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E 0 +E Iu Iv Iw +FWD RB-FW +IGBT © Fuji Electric Co., Ltd. All rights reserved. 8 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E -E 0 Iu Iv Iw +FWD -IGBT RB-FW © Fuji Electric Co., Ltd. All rights reserved. 9 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW 0 -E 0 Iu Iv Iw RB-FW -IGBT RB-FW © Fuji Electric Co., Ltd. All rights reserved. 10 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E -E 0 Iu Iv Iw +FWD -IGBT RB-FW © Fuji Electric Co., Ltd. All rights reserved. 11 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E -E 0 Iu Iv Iw +IGBT -IGBT RB-FW © Fuji Electric Co., Ltd. All rights reserved. 12 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E 0 0 Iu Iv Iw +IGBT RB-FW RB-FW © Fuji Electric Co., Ltd. All rights reserved. 13 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E -E 0 Iu Iv Iw +IGBT -IGBT RB-FW © Fuji Electric Co., Ltd. All rights reserved. 14 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW 0 -E -E Iu Iv Iw RB-FW -IGBT -FWD © Fuji Electric Co., Ltd. All rights reserved. 15 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E -E -E Iu Iv Iw +IGBT -IGBT -FWD © Fuji Electric Co., Ltd. All rights reserved. 16 3-Phase Circuit with Inductive Load Vu Iu Vv Iv Vw Iw MT5F28646b Vu Vv VW +E 0 0 Iu Iv Iw +IGBT RB-FW RB-FW © Fuji Electric Co., Ltd. All rights reserved. 17 Switching Mode Current + + - T: Psat D1: Pf ↑(A) T1: Eon, T4:Err ↑(B) T3: Eoff ↓(A) T1: Eoff ↓(B) T3: Eon,D2:Err Phase Voltage T4: Psat,Pf 0 T3: Psat, Pf ↑(B) T4: Eon, D2:Err ↑(A) T2: Eoff ↓(A) T2: Eon, T3:Err ↓(B) T4: Eoff - MT5F28646b D2: Pf T2: Psat © Fuji Electric Co., Ltd. All rights reserved. 18