| Abstract |
This paper introduces a new pulse-width-modulation (PWM) -based control technique for 7-levelactive neutral-point-clamped (A-NPC) flying-capacitor (FC) inverters. It regulates the inverter'soutput voltage and current, and balances the FCs at their target values. It is realized on basis ofactive control approach which is achieved using instantaneous measurements taken from inverter,and then interpreted into the logical quantities. Contrary to the space-vector modulation (SVM)and model predictive control (MPC), the proposed solution is deemed a direct approach whichexcludes the cost functions and its time and software-consuming optimization process to generatethe switching states. It utilizes the measured values of FC voltages and load current to derivelogical variables and equations that directly determine the inverter's switching states accordingto the reference voltage-levels. As an advantage, any commonly used modulators such as phase-shifted-carrier (PSC) or phase-disposition (PD) strategy could be readily embedded into controlunit to generate the inverter's reference voltage-levels. The experimental results are provided tovalidate the suggested active balancing technique, its effectiveness and fast execution-time. |
