The Tesla Model S Plaid, the fastest and most powerful electric vehicle in the company’s history, began shipping last week. And in fresh tweets, Tesla CEO Elon Musk explained what makes Plaid’s engines so special.
Recall that the car is equipped with three electric motors with a total capacity of 1020 horsepower. They can accelerate to 60 mph (96.6 km / h) in 1.99 seconds, although the automaker starts counting from the wrong place, after the wheels turn one foot, which gives a certain head start.
So, Plaid got very light motors that one person can lift. At the same time, high power was achieved due to the use of carbon fiber parts.
As explained by Elon Musk, carbon fiber is used to wrap a copper rotor, and the technology for manufacturing such a wrapper was developed by Tesla itself and is unique in the automotive industry.
Firstly, the carbon fiber wrap allows the rotor to develop high rpm without the risk of deformation under the influence of centrifugal force. This, in turn, increases the power density of the engine.
Secondly, CFRP keeps the copper rotor from damage due to the difference in thermal expansion with the stator at the start of the engine. In general, the carbon fiber jacket around the copper rotor is pre-tensioned, meaning that the copper parts of the rotor are always under pressure.
Most interestingly, according to Musk, Tesla engineers have a few more ideas to further increase the torque and power of the engine, which will be used in the Roadster model. The development of the latter should be completed by the end of the year, and its release will be adjusted next year.