3 ms·
It's a permanent magnet motor. It's an IPM design so some amount of the torque comes from reluctance, but the majority of the efficiency is from the permanent m
by TD-Linux 7y ago
It's a permanent magnet motor. It's an IPM design so some amount of the torque comes from reluctance, but the majority of the efficiency is from the permanent magnets providing the field rather than having to burn energy through the induction motor's copper bars to provide it.
- pitaj 7y agoWhich is interesting. I wonder what the math looks like, since induction motors (without the heavy magnets) tend to be lighter. I can see why they'd avoid a rotor-coiled motor, since that comes with lifetime constraints.
- amluto 7y agoAs I understand it, the permanent magnet motor is more efficient at low fractions of maximum torque/power output. So, when cruising, the rear motor will be powered down. When accelerating heavily, the rear motor can kick in.
- baybal2 7y agoInduction motors are worse at regeneration at low speeds, but as poster below said, their advantage is that they can be powered down and not impede coasting. I think they hope to be able to match power requirements of highway cruising using a PM motor, so they don't take losses spinning AC motor way below its power rating.
- AFascistWorld 7y agoWill it deteriorate?
- baybal2 7y agoWith adequate cooling, permanent magnet motors can last a decade or more, even in the most demanding applications