Power Electronics Tech Scenario

Silicon Carbide is the Wide Band Gap (WBG) semiconductor.[2- 4 eV]. Si has 1-2 eV.
Silicon Carbide has arrived and world is waiting for Gallium Nitride.
SiC has lower resistance than Si, Can operate at higher frequencies, can withstand upto 250 Deg temp needs only air cooling.
RDSON, and switching losses are less in SiC

What makes a motor energy efficient ( IE2 )

Core Loss in motor :- hysteresis and Eddy current loss. Mainly in stator core ( as rotor core losses are @ slip freq.).
To reduce this material of core should be low loss Si steel. M45, M43, M36, M24 grade. ( increasing order of low-loss) Stamping should be thinner than 0.4mm

Rotor Copper Loss:- Die-cast rotors reduce losses.( instead of Cu bars).

Better Heat Transfer:- Aluminium stator frame does it better.

Reduction in air-gap of 2-pole motors: helps in increasing efficiency.