The efficiency of the motor is critical in terms of losses. Iron loss and copper loss are the main components.
Permanent magnet DC motors can effectively reduce rotor losses.
Ironless permanent magnet motors are highly efficient, and pcb permanent magnet motors are a good example.
The future high-efficiency motor application scenario can completely replace the internal combustion engine.
Battery technology is changing with each passing day.
There is no essential leap in high-efficiency motors. This is not normal and should be limited by the various motor theories.
There should be a technology that completely subverts existing motor theory to greatly increase the efficiency of the motor.