PWM control method to eliminate Common Mode Voltage in three level T-Type inverters

2019 5th International Conference on Environment and Renewable Energy

生态环境科学;能源学

Tran, Vinh-Thanh^1 ; Hai-Quach, Thanh^1 ; Do, Duc-Tri^1 ; Choi, Youn-Ok^2 ; Jung, Pan-Gum^2 ; Cho, Geum-Bae^2

Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City

70000, Viet Nam^1

Department of Electrical Engineering, Chosun University, Gwangju

61452, Korea, Republic of^2

关键词: Bearing damage;    Carrier signals;    Common mode voltage;    Modulation strategy;    Noise problems;    Operating principles;    Sinusoidal pulse width modulation;    Winding insulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/307/1/012004/pdf
DOI  :  10.1088/1755-1315/307/1/012004

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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 T2I) 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.