Elon Musk Just LEAKED A Rare-Earth Free Tesla Motor!
Elon Musk Just LEAKED A Rare-Earth Free Tesla Motor!
Tesla CEO Elon Musk disclosed that the company would create an electric vehicle engine using permanent magnets that would not contain any rare earth elements during its investor day. Rare earth elements are a cause of friction in the supply chains for EVs due to their difficulty in procuring supplies and the fact that China produces the great bulk of the world’s supply. But this leads to another big question, what would replace the rare earth elements instead? And could this affect the performance and durability of the new motor? What are the potential substitutes for rare earth elements? What is silicon carbide and its role in EV performance? Stay tuned and let’s find out all of these in this episode!
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Silicon Carbide (SiC) use in lower-end Electric Vehicles (EVs) would be reduced by 75% in a new powertrain being developed, according to a recent announcement by Tesla. This has led to concerns about SiC’s future in the EV market. Due to its high power efficiency, ability to reduce voltage and current losses, and capacity to decrease motor size and weight while enhancing thermal efficiency, SiC presents a potential alternative for EVs. Due to other manufacturers’ potential decision to reduce their use of SiC in their EVs, Tesla’s announcement could have a negative impact on the SiC market. What announcements has Tesla made, why has SiC emerged as a viable choice for EVs, and might this generate upheaval in the SiC market?
Why does SiC seem like a great power option for engineers?
Although silicon carbide (SiC) has been around for a while, it has only recently experienced an acceleration in its development. Older technologies like insulated-gate bipolar transistors (IGBTs) face several difficulties that make them challenging to use as the power requirements of DC systems continue to rise. Improved energy efficiency in switching devices is one of these issues.
Energy efficiency is most obviously beneficial for longer battery life and lower CO2 emissions, assuming that fossil fuels are used to generate electricity. As a result of decreased losses, which result in less heat being produced, improving a switch’s energy efficiency is essential for improving thermal properties as well. Design miniaturization is possible if a switch can be made to operate cooler and smaller.
Engineers have numerous opportunities thanks to SiC’s nearly five times stronger thermal conductivity, ten times higher breakdown voltage, and three times wider bandgap compared to ordinary silicon technology. In other words, SiC devices are perfectly suited for high voltage, high power applications because of these features. At the same time, SiC is better suited to functioning at higher switching frequencies, which aids in lowering the size of passives like inductors, greatly reducing the weight of devices like power converters.
Therefore, it stands to reason that SiC devices have gained popularity among EV producers in particular. More powerful motors can be used, vehicle range can be increased, and more crucially, higher DC voltages can be used, which minimizes power losses in cables and facilitates faster charging. These benefits come from making powertrains smaller and more energy-efficient.
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