2 ms·
> Mechanical transmissions are still more efficient, at least for cars, than spinning a generator that then powers an electric motor. Do you have a reference?
by 4ad 10y ago
> Mechanical transmissions are still more efficient, at least for cars, than spinning a generator that then powers an electric motor.
Do you have a reference?
Since both electric generators and motors well exceed 99% efficiency at this power level, I don't see how can this be the case.
- mikeash 10y agoDo you? I can't dig up anything particularly good, but what I do find indicates in the mid-90% for practical electric motor efficiencies. This says 85-95% efficiency for the motor in an EV: https://matter2energy.wordpress.com/2013/02/22/wells-to-wheels-electric-car-efficiency/ https://matter2energy.wordpress.com/2013/02/22/wells-to-whee... This says 93% for a brushless DC motor: http://electronics.stackexchange.com/questions/58236/why-does-a-tesla-car-use-an-ac-motor-instead-of-a-dc-one http://electronics.stackexchange.com/questions/58236/why-doe... I found a bunch more of similar quality searching for "ev motor efficiency" and similar. I'm not particularly satisfied with those, so if you have something better, I'd love to see it!
- Gracana 10y agoAnd don't forget, you have generator efficiency to deal with as well. If you're 90% on both sides, the system is only 81% efficient. Ouch!