Title :
A novel PWM scheme to eliminate common-mode voltage in three-level voltage source inverter
Author :
Ratnayake, K.R.M.N. ; Murai, Y.
Author_Institution :
Dept. of Electr. & Electron. Eng., Gifu Univ., Japan
Abstract :
This paper proposes a simple PWM scheme which alleviates the common mode voltage problems of the three level inverter applications. The new scheme uses only seven voltage vectors. In addition, this method avoids the occurrence of narrow PWM pulses and gives the advantage of less complex control circuitry. Moreover the new PWM scheme shows a great potential of reducing common-mode current and bearing current problem
Keywords :
AC motor drives; PWM invertors; machine bearings; variable speed drives; PWM; bearing current reduction; common-mode current reduction; common-mode voltage elimination; control circuitry; three-level voltage source inverter; variable speed drives; Couplings; Electromagnetic interference; Electronic equipment; Parasitic capacitance; Pulse circuits; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Variable speed drives; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.701910
