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Yeah the smart money has really gone into batteries because that's where all the "secret" sauce is. Induction motors are pretty well known at this point. There
by hangonhn 7y ago
Yeah the smart money has really gone into batteries because that's where all the "secret" sauce is. Induction motors are pretty well known at this point. There are companies working on better motors but the expected ROI is rather low and the expected effect on the car overall is low. Advances in batteries in terms of weight or density would be very dramatic because most electric cars are designed around the battery pack.
- taneq 7y ago> Induction motors are pretty well known at this point. So what about this switched reluctance witchcraft that apparently gives the newer Teslas a significant advantage?
- baybal2 7y agoIt doesn't. Power to weight of ordinary well done motors is approaching 5kw per kilogram, and top tier ones even passed 10. Weight of a motor is not an issue for practical considerations for EVs
- taneq 7y agoSo why do they have a huge Wh/km advantage over rivals such as Porsche? https://www.xautoworld.com/opinion/taycan-201-tesla-range/ https://www.xautoworld.com/opinion/taycan-201-tesla-range/
- baybal2 7y agoLess aggressive regenerative breaking to compensate for cooling deficiency, and less efficient inverter. Tesla being able to "turn off" front motor, and lack of differential probably also adds a little bit to efficiency.
- agumonkey 7y agoI thought switched reluctance was about cost reduction (with maybe a few percent efficiency increase). Maybe weight too.
- hangonhn 7y agoIt's more efficient than an induction motor. An induction motor has the most torque when it's at rest but then generates its own resistance as it spins up and so loses efficiency. In the dual motor setup, Tesla use both types to get the best of both worlds: induction to accelerate and then it cuts off at some point and uses only the switched reluctance for efficiency.