New Inverter Could Make EVs More Efficient

An engineering developer based in the United Kingdom has released an inverter that has received praise for its compact design. Equipmake took an innovative approach by releasing its next generation HPI-800 inverter, which utilizes silicon carbide technology that makes an electric vehicle more efficient.

An inverter is a vital component in the operation of electric vehicles (“EVs”). It converts the high voltage DC charge stored in the batteries to multiphase AC current in order to drive the electric motor. In addition, an inverter regulates the speed of the motor by adjusting the frequency of the AC charge similar to the fuel injection and ignition system of an internal combustion engine.

An electric vehicle is considered to be efficient if the inverter is faster and has a higher power density. This allows a greater amount of driving range to be drawn out of the battery.

Equipmake is headquartered in Norfolk, England, and is known for producing EV components for specialist supercar makers and automotive OEMs. This includes electric motors, electric drivetrains, power electronics and electronic systems. Electric cars have relied on insulated-gate bipolar transistor inverters that switch currents at up to 20 Kilohertz (“kHz”). Silicon carbide inverters, on the other hand, offer higher power levels, lower power losses and can switch a current to up to 40 kHz.

The product designers and engineers have benefitted from packaging and aerodynamic improvements to the inverters while at the same time reducing the amount of cooling the vehicle needs due its ability to operate at higher temperatures. The inverters are also smaller and lighter in comparison to insulated-gate bipolar transistor (“IGBT”) inverters. As a result, silicon carbide (“SiC”) inverters have a reduced power-to-weight ratio (“PWR”). The PWR of these SiC inverters is 100 kilowatt per kilogram (kW/kg) while IGBT inverters have a PWR of 40kW/kg.

Original equipment manufacturers (“OEMs”) can opt for the HPI-800 inverter because it measures 494mm long, 94mm high and 287mm wide. It weighs about 12.7kg and provides significant benefits for all types of EV powertrains by reducing the required battery size. Depending on the motor it is powering, the inverter can supply a maximum continuous output power of up to 400 KW. Equipmake has made the inverters available with up to a thousand units ready for order.

Because of silicon carbide’s impressive physical and electrical characteristics, most companies are turning to silicon carbide technology. It is estimated that at least 80% of all automotive drivetrain activity integrates silicon carbide, so it may not be surprising when electric vehicle manufacturers such as Mullen Automotive Inc. (NASDAQ: MULN) come up with innovations that make more use of silicon carbide.

NOTE TO INVESTORS: The latest news and updates relating to Mullen Automotive Inc. (NASDAQ: MULN) are available in the company’s newsroom at https://ibn.fm/MULN

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