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You forgot the efficiency of the electric motor itself and everything between it and the battery pack (converter, etc.)
by corentin 18y ago
You forgot the efficiency of the electric motor itself and everything between it and the battery pack (converter, etc.)
- lliiffee 18y agoThat seems like an excellent point. It looks like electric motors are pretty efficient, particularly big, powerful ones. Electric cars, with 100hp or more should achieve about 95% efficiency, according to this: http://www.psnh.com/Business/SmallBusiness/Motor.asp http://www.psnh.com/Business/SmallBusiness/Motor.asp I don't know about converters, or what 'etc' is... (I'd guess you are more qualified than me to factor that in-- any estimate?)
- corentin 18y agoBig electric motors are indeed quite efficient. You don't connect them directly to the battery pack, though. You need "something" in-between (power electronics) to drive the motor. I'd estimate the efficiency of such a controller to be around 80/90%.