While you are correct that electric motors have only one moving part, the advantage of electric motors over internal combustion engines goes beyond the number of moving parts. Internal Combustion Engines are "heat engines". Heat engines are limited in efficiency by the internal temperature and the external [exhaust] temperature. Heat engines could only be 100% efficient if the internal temperature were infinite and the exhaust temperature were absolute zero. The max. efficiency of internal combustion engines is about 45%.
Good topic. I am surprised that not many people bring this up. Even the hybrids represent the worse of both worlds: gas motors w/ many moving parts + under powered batteries+ 2nd drivetrain = a bloated car with a higher cost of ownership. I think these attributes are some of the reasons why the Volt and Karma are failures.
I wonder if Tesla's future ad campaigns will acknowledge the benefit of their design.
In the meantime, let the good press continue...
Gas engines are heat engines and limited by Mother Nature's thermodynamic laws governing heat engine efficiency. [The gas has to be heated above ambient temperature to cause the gas to flow. Wankel Rotary engines are also heat engines.
Just google it and check wikipedia to see for yourself the complexity of a gas turbine or Wankel engine compare to an electric motor. Just look at the pictures, and you'll get the idea.
Sentiment: Strong Buy
when's the last time you had to replace an electric motor in your furnace, ac, fridge, washer, dryer, etc.
it happens, but it's rare. No problem with my 50+ year old appliances that never get serviced!
Future, I'm still waiting for you to answer why you bashed me about posting on this board when it's a fact you have posted far more times than me the past 6 months. Actually, it's almost at a 2:1 daily rate!
What's your point? Are you retired/ Do you do anything in life?
Come on! Quit hiding!
The other aspect that alot of people don't understand is you can run that Elec. Motor at full power with little or no issue. ICEs produce so much friction/heat that high rpm or load is a killer and also hard on the trans.
The Elec. Motor can be overheated, but with the proper design plus software you can have a ton of margin to its real limit far further away then an ICE is asked to operate under load. Hence we have aftermarket... Oil Coolers, Transmission Coolers, etc. Why...? Because other then Work/Energy an ICE produces more Heat than anything else.
For Tesla it's all about the battery and if they can get the little parts reliable they will be fine.
My understanding based on what I've read is we won't truely know until year 4. Thats when we see the first signs of the batterys energy storage drop off. By then we will have a large data sample of Tesla's 100,000 miles and over 1,000 charges.
It is not just that there are so many fewer moving parts in their watermelon sized drive train as they call it. EVs eliminate so many adjunct systems such as transmission, radiator, fan assembly, water pump, fuel tank, fuel pump, catalytic converter, exhaust system. When you count up all the parts the Tesla does not have to manufacture and assemble, it is easy to understand why they expect to have 25% margins, low maintenance and recall expenses, low depreciation... I could go on and on.
And hence fewer mechanical parts that can break or need maintenance which is why most dealerships make most of their profit from their repair and service side and why TESLA does not need to have dealerships to take care of their cars. That's why TESLA is not just a "Car" in the 20th century sense of the word.
Sentiment: Strong Buy