Why three phases is used in polyphase system instead of 6 12 or more number of phases?

Three-phase systems are preferred in polyphase designs because they offer a balanced load, efficient power transmission, and reduced conductor material compared to systems with more phases. With three phases, the power delivery is constant, minimizing fluctuations and providing smoother operation for motors and other equipment. Additionally, three-phase systems efficiently utilize space and infrastructure, making them cost-effective and practical for industrial and commercial applications. Increasing to 6, 12, or more phases complicates the system without proportionate benefits in most scenariOS.