Title :
Performance enhancement method for PWM VSI drivers in low frequencies
Author :
Amarasekara, A.A.B. ; Punchihewa, P.I.G. ; Rangana, M.A.M. ; Abeyrathna, S.G.
Author_Institution :
Dept. of Electr. & Electron., Univ. of Peradeniya, Peradeniya, Sri Lanka
Abstract :
A dead time is essential for an inverter to prevent short circuit condition in a leg. However, when it is included the output voltage volt-seconds are lost or gained depending on the output current direction. Due to this, there is a deviation of expected voltage. Inverter consists of IGBTs where each has IGBT saturation voltage and diode threshold voltage. At low voltage, dead time distortion and device voltage drop cause torque pulsation. In this paper a simple but an accurate dead time distortion compensation method is used. Also a voltage boost is proposed for device voltage drop. Using these compensation methods, torque pulsation is reduced.
Keywords :
PWM invertors; driver circuits; insulated gate bipolar transistors; power bipolar transistors; power semiconductor diodes; IGBT saturation voltage; PWM VSI drivers; dead time distortion compensation method; device voltage drop; diode threshold voltage; output current direction; output voltage volt-seconds; performance enhancement method; short circuit condition; torque pulsation; voltage boost; voltage source invertors; Induction motors; Insulated gate bipolar transistors; Inverters; Pulse width modulation; Threshold voltage; Time-frequency analysis; Torque; PWM; VSI drives; dead time; low frequency; v/f method;
Conference_Titel :
Power, Energy and Control (ICPEC), 2013 International Conference on
Conference_Location :
Sri Rangalatchum Dindigul
Print_ISBN :
978-1-4673-6027-2
DOI :
10.1109/ICPEC.2013.6527725
