4.6 NUETRAL POINT CLAMPED (NPC) INVERTERS - Printable Version +- Free Academic Seminars And Projects Reports (https://easyreport.in) +-- Forum: Seminars Topics And Discussions (https://easyreport.in/forumdisplay.php?fid=30) +--- Forum: Miscellaneous Seminars Topics (https://easyreport.in/forumdisplay.php?fid=21) +---- Forum: General Seminar Topics (https://easyreport.in/forumdisplay.php?fid=58) +---- Thread: 4.6 NUETRAL POINT CLAMPED (NPC) INVERTERS (/showthread.php?tid=41930) |
4.6 NUETRAL POINT CLAMPED (NPC) INVERTERS - [email protected] - 10-04-2017 [attachment=5973] 4.6 NUETRAL POINT CLAMPED (NPC) INVERTERS Known as three-level inverters Problem of 2-level inverter in high-power applications High DC page link voltage requires series connection of devices difficulty in dynamic voltage sharing during switching Solved using NPC inverter or multilevel inverter NPC inverter circuit NPC (3) DC page link capacitor split to create neutral point 0 Q11, Q14 : main devices (2-level inverter) Q12, Q13 : auxiliary devices clamp output potential to neutral point with help of clamping diodes D10 D10 All PWM techniques apply NPC inverter operation Consider HEPWM technique to eliminate 2 lowest significant harmonics (5th and 7th) and control fundamental voltage |