Title :
Self-balancing of the clamping-capacitor-voltages in the multilevel capacitor-clamping-inverter under sub-harmonic PWM modulation
Author :
Yuan, Xiaoming ; Stemmler, Herbert ; Barbi, Ivo
Author_Institution :
Power Electro. & Electrometrol. Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland
fDate :
3/1/2001 12:00:00 AM
Abstract :
The paper explores the spontaneous coupled clamping-capacitor-current control loops and the resultant self-balancing property of the clamping-capacitor-voltages in the multilevel capacitor-clamping-inverter. The case of the three-level capacitor-clamping-inverter under sub-harmonic PWM modulation is dealt with first. The case of the multilevel capacitor-clamping-inverter (M>3) under sub-harmonic PWM modulation is then analyzed. Test results on a half-bridge three-level capacitor-clamping-inverter prototype under sub-harmonic PWM modulation are demonstrated
Keywords :
PWM invertors; bridge circuits; electric current control; clamping-capacitor-voltages; half-bridge inverter; multilevel capacitor-clamping-inverter; self-balancing; self-balancing property; spontaneous coupled clamping-capacitor-current control loops; sub-harmonic PWM; three-level capacitor-clamping-inverter; Capacitors; Clamps; Diodes; Frequency; Leg; Power electronics; Pulse width modulation; Pulse width modulation inverters; Stability; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
