摘要
The multiplicity of vector combinations for vectors of combined three-level inverters plays an important role, when deciding on the modulation scheme, to obtain minimum switching per inverter vector change, as described in the next Section. This is not possible with reduced common-mode three-level inverter structure, obtained with a five-level cascaded H-bridge configuration, as the space vectors locations do not exhibit multiplicity. Moreover, the proposed configuration requires only two power supplies, whereas the scheme with the five-level H-bridge configuration requires six isolated power supplies.
3 Proposed three-level voltage space phasor generation with common-mode voltage elimination
The common-mode voltage generated in the pole voltage of inverter A is expressed as：
出处
《变频器世界》
2006年第5期27-28,共2页
The World of Inverters
