4 ms·
Why not just use an induction motor with VFD?
by RobotToaster 4mo ago
Why not just use an induction motor with VFD?
- adrian_b 4mo agoAs said in the parent Web page, lower energy efficiency, thus shorter range with the same battery. Another poster has mentioned that BMW also uses EESMs instead of permanent-motor magnets. BMW uses EESMs as the main motors, on the rear axle, while they use induction motors as auxiliary motors on the front axle. Besides being cheaper, the induction motors have the advantage that if they are used only as auxiliary motors, you can cut the power supply to them at any time, in which case they will consume nothing. So their lower efficiency does not matter, because most of the time they are turned off.
- CarVac 4mo ago> Besides being cheaper, the induction motors have the advantage that if they are used only as auxiliary motors, you can cut the power supply to them at any time, in which case they will consume nothing. EESMs have this advantage too, you can simply cut power to the field winding.