Showing papers presented at "European Conference on Power Electronics and Applications in 1992"

Switching frequency optimal PWM control of a three-level inverter

Abstract: A pulse-width modulation (PWM) method for the control of a three-level inverter is described. Switching frequency optimal-PWM method (SF0-PWM) works with a constant carrier frequency not synchronized with fundamental stator frequency. SF0-PWM gives an optimal utilization of mean thyristor switching frequency permitted, therefore PWM carrier frequency may be chosen to a value of two times the permitted mean thyristor switching frequency. The signal processing structure is simple. Many applications of three-level- inverters work with a dc-link neutral point not stabilized from the power input converter