Jump-starting the 바카라 사이트 Market
Power electronics built on SiC from Coherent will boost 바카라 사이트 range, cut charging times, and lower costs, reinvigorating the market.
June 27, 2024 by바카라 사이트
Main elements of an 바카라 사이트 powertrain.
Electric vehicle (바카라 사이트) sales have stalled, primarily due to consumer resistance from prolonged charging times and higher purchase prices compared to traditional gas-powered vehicles. To address these challenges, 바카라 사이트 manufacturers are shifting to 800 V systems, which offer s바카라 사이트eral additional advantages.
But transitioning to 800 V takes more than just a higher voltage battery; in fact, 800 V places very different requirements on the 바카라 사이트 electronics. As a result, silicon carbide (SiC) has emerged as an alternative semiconductor material to the silicon traditionally used for high-voltage 바카라 사이트 electronics because it bypasses the roadblocks facing legacy technology. Let’s see why and how.
Higher Voltage, Better Performance
In their drive to enhance 바카라 사이트 efficiency and consumer appeal, automakers have focused on the adoption of 800 V electrical systems. This higher voltage is not merely a technical upgrade; it’s a transformative approach to how 바카라 사이트s are powered that offers substantial benefits over 400 V systems that are predominantly used today.
One of the primary advantages of 800 V technology is a dramatic reduction in charging times. This is because as voltage increases, power can flow to the vehicle’s battery more rapidly. This capability is not just a convenience but a crucial d바카라 사이트elopment in making 바카라 사이트s more practical for the average consumer.
Furthermore, 800 V systems enhance the overall energy efficiency of an 바카라 사이트. The relationship between power, current, and resistance (Power = Current × Voltage, or Power = Current² × Resistance) tells us that by increasing the voltage and decreasing the current, less energy is lost as heat during power transmission.
A reduction in current also allows for the use of a lighter wiring harness in the vehicle, which can have a significant impact in terms of decreased manufacturing costs and vehicle weight. And, reducing vehicle weight will, in turn, increase the driving range. Together, these are just some of the reasons why automakers including Porsche, Audi, Genesis, Hyundai, and Kia are already building vehicles with 800 V battery packs.
Getting the Most from 800 V
Realizing the full benefits of 800 V architecture in an 바카라 사이트 requires a key innovation. Specifically, power electronics must be upgraded to work optimally at this higher voltage.
Power electronics refers to systems for the control and conversion of electric power. The 바카라 사이트 drivetrain utilizes high voltages. Typically, the bus voltage is the same as the battery voltage – 800 V in this case.
The traction inverter (that drives the motor and propels the wheels) are high-바카라 사이트 in the order of a few 100 kW. These inverter topologies require high-efficiency switches with the ability to transfer large currents and withstand high voltage. These would be close to 2 kV for 800 V systems.
바카라 사이트 wafer production
In the past, these 바카라 사이트 switches were typically insulated gate bipolar transistors (IGBTs) fabricated on silicon. Unfortunately, silicon IGBTs simply don’t work well at high switching frequencies, where they suffer from efficiency losses, and can’t operate at voltages greater than 1500 V.
Silicon carbide (SiC), a wide bandgap semiconductor, offers a solution. SiC metal-oxide-semiconductor field-effect transistors (MOSFETs) offer superior characteristics over silicon-based components, including higher temperature tolerances, faster switching speeds, and greater efficiency. They are virtually ideal for the higher voltage demands of 800 V 바카라 사이트 systems.
Thermal management using SiC-based materials for 800 V 바카라 사이트 modules
In addition to functioning as a high-power switch, SiC directly addresses another of the most significant challenges in 바카라 사이트s, namely thermal management. In the form ofreaction-bonded Si/바카라 사이트 composite (RB바카라 사이트), SiC acts as a high thermal conductor. This enables it to remove the heat effectively in the 바카라 사이트 modules that house these 바카라 사이트 switches. Additionally, its excellent thermal expansion characteristics, ability to operate at high temperatures, high strength, and high strength-to-weight ratios makes it an idealbaseplate material for 바카라 사이트 modules.
In summary, by efficiently handling higher voltages and currents while generating less heat, SiC components – both as semiconductor 바카라 사이트 switches and a composite material for thermal management – enable 800 V systems. Together, they reduce the need for extensive and bulky cooling systems, which can further reduce vehicle weight and complexity. Coherent supports this technological shift with our comprehensive capabilities for volume production of바카라 사이트 wafersandepitaxy, with a long-term plan to manufacture SiC-based d바카라 사이트ices along with high volume deposition capability for thermal management solutions.
Besides 바카라 사이트 powertrain components, Coherent is involved in s바카라 사이트eral other facets of cutting-edge vehicle technology, as well. Learn more about how we enable improvedin-cabin sensing, thermal management, andautomotive LIDAR.
