Open AccessPWM control method to eliminate Common Mode Voltage in three level T-Type inverters
Author(s) -
Vinh-Thanh Tran,
Thanh Hai-Quach,
Duc-Tri Do,
Youn-Ok Choi,
Pan-Gum Jung,
Geum-Bae Cho
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/307/1/012004
Subject(s) - pulse width modulation , common mode signal , inverter , overvoltage , voltage , control theory (sociology) , modulation (music) , electronic engineering , electrical engineering , engineering , computer science , physics , control (management) , acoustics , digital signal processing , artificial intelligence , analog signal
In this paper, Common-mode voltage (CMV) is responsible for overvoltage stress to the winding insulation and bearing damage of an AC motor. High dv/dt of CMV causes leakage currents, which create noise problems to the equipment installed near the converter. This paper presented modulation strategy to eliminate CMV three level T-Type inverter (Zero CMV 3L T 2 I) that substantially eliminates CMV. The principles of selecting suitable triangle carrier signals for the T-Type is described. This PWM control method can mitigate the peak value to 95% as compared to the conventional sinusoidal pulse width modulation method. A prototype is constructed to verify the operating principle of the three-level T-Type inverter. Simulation and experimental results are presented.