| | | COHR, SiC and Tesla
Just some more random thoughts on the subject of Tesla saying it will reduce SiC content in new designs by 75%.
Tesla
- uses AC motors because they have more torque than more efficient DC motors.
- Tesla started out selling high performance cars to the wealthy who
- got a huge tax subsidy,
- cred with their kids for driving them to school in electric cars to "save the planet"
- a sticker in CA that allowed them to use the HOV (3 people per auto) commute lanes as solo drivers (IE the rich could buy their way into less time in traffic)
- Want to drive a car that tells everyone they are "successful" and can afford a $100K+ Model S.
- Even now that their commuter stickers have expired, they get a 50% EV discount to use the HOV lanes that were converted to Toll Lanes... and I think they get a bigger discount if they add a passenger...
- DC motors will lower the SiC cost and make lower performance, more efficient cars... probably what is needed to get the price under $30K
Unknown so far... maybe ask chat.openai.com
- What are cheaper, AC or DC motors?
What are cheaper, AC or DC motors for EVs?
In general, AC (alternating current) motors are considered to be cheaper than DC (direct current) motors for electric vehicles (EVs) due to several reasons.
Firstly, AC motors are simpler in design and have fewer parts than DC motors. This means that AC motors are generally easier to manufacture, which can result in lower overall costs. AC motors are also more widely used in the automotive industry, which means that there is a larger supply chain and economies of scale for producing these motors.
Secondly, AC motors are more efficient than DC motors, which means that they require less energy to operate. This can result in lower operating costs and improved range for the EV.
Lastly, AC motors are better suited for regenerative braking, which allows the motor to act as a generator and recover energy during braking. This can help to extend the range of the EV and reduce overall energy consumption.
That being said, there are some cases where DC motors may be preferred for EVs, such as in certain niche applications where precise speed control or high torque is required. However, for most mainstream EV applications, AC motors are generally considered to be more cost-effective and better suited for the job.
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