MV inverter stack topologies

Multilevel Power Converters: A Survey

“…MPCs were initially proposed in ac motor drives applications due to their ability to generate low harmonics, multi-tier waveforms [77,78]. These converters have been extensively applied in ac motor drives in medium and high voltage ratings [84][85][86] Several MPC topologies have been proposed for static power conversion applications [79][80][81][82], Permanent magnet brushless motor (PMSM) drives are used in high power three-phase industrial drives and as well as in single-phase traction drives . Series H-Bridge MLI with isolated dc sources for each level has been proposed for Electric Vehicle (EV) drives applications.…”

State Feedback Control of Multilevel Inverters for DSTATCOM Applications

“…1(b) for a five-level DCMLI, resulting in the asymmetry between the charging and discharging time of dc capacitors. The detailed description of this phenomenon and other structural and operational details of DCMLI can be found in [4] and [12]- [14]. With the advent of a number of dc capacitor voltage control schemes, the use of DCMLI is not behind that of other multilevel inverters in most of the applications.…”

“…This is because it has some of the desirable features such as: 1) its dc capacitors can be easily precharged as a group, 2) its switching control is easiest, and 3) the protection circuit required in DCMLI is least complex compared to that in other multilevel inverters, etc. [4], [14].…”

“…Besides, a multilevel compensator, in comparison with its two level counterparts, makes more exact formation of the compensating currents possible. It also has better properties under sudden changes of load making these topologies attractive for continuous control of system dynamic behavior and to reduce power quality problems [3]- [14]. Multilevel inverters are generally classified as diode-clamped multilevel inverter (DCMLI), cascade H-bridge inverter and flying capacitor multilevel inverter (FCMLI).…”

Design and analysis of a permanent magnet generator for naval applications

“…Specifically, since the IGBTs and diodes are rated for 1,200A each, 19 modules (each rated for 845 kW) are connected in parallel to achieve the required 22.5 kA. This can be readily accomplished using IGBTs provided the switching is properly controlled [55].…”