Siemens Robicon
Siemens Robicon Perfect Harmony is a cell-based medium-voltage drive you build for mega-motors: connect multiple 480 V power-cell modules in series, feed with phase-shifted transformers; near-sinusoid 4160 V output, cell-bypass and redundancy options let you control pumps, fans or compressors above 30 MW with <3 % THD and 97 % efficiency, while the integrated PLC handles start-up sequencing and protection.