PE System

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PE System (Power Electric System) is the driving device for electric vehicles.[1] Hyundai, Genesis, and Kia are using this device in some of their models.

Details

The PE System serves as an engine and a transmission for an internal combustion engine in an electric vehicle. The first generation PE system consists of the motor and inverter separated and connected with an orange three-phase cable. The second-generation PE system consists of an integral motor and inverter, and cables and connectors have disappeared. The third-generation PE System consists of an integral motor, inverter, and reducer.

The third-generation PE system was applied to Hyundai Motor Group's E-GMP platform. Four-wheel drive is applied by placing motors on the front and rear wheels. The integration of the motor-inverter housing lowered the inverter height by about 30 mm.

The PE System has also been installed into the Vision FK, an eco-friendly hydrogen electric vehicle. In this vehicle, the PE System has been combined with a hydrogen fuel cell system.[2]

A standardized battery system can be tuned and implemented as part of the system appropriate for a specific vehicle segment. This system is said to maximize driving range or meet the needs of a customer.[3]

Hyundai

The motor is shown in the front, as well as the EV Transmission and Inverter.

Hyundai's PE System consists of 3 Principles; Motor, EV Transmission, and Inverter.[4] These components are integrated into one single compact module.

Motor

The motor is controlled by the inverter power module. Electrical energy in the battery converts into mechanical energy which the motor then uses to produce power for the vehicle to run. When the accelerator is applied on, the battery of the car supplies electrical energy to the stator, where the rotors then start to turn and subsequently provide mechanical energy to the car's gears, thus powering the wheels.[5] It is also used as a generator during reduction per regenerative braking system.

EV Transmission

The Transmission adjusts the number of revolutions by the motor. This results the attainment of higher torque of the electric vehicle. With this is the EV Transmission Disconnector. The Disconnector allows for the motor and drive axle to be disconnected, which enables free shifting between 2WD (2 wheel drive) and 4WD (4 wheel drive). This is only available for the all-wheel drive system.

Inverter

Powering the electric motor, DC-power in the battery is converted to the AC-power used for torque control in the motor. The inverter power module comes with Silicon Carbide (SiC) semiconductors. These are proven to be more efficient than existing semiconductors that are only made with Silicon, as one but not limited to the increase of thermal management, where the thermal conductivity of silicon carbide is 1490W/m-K (Watts per meter-Kelvin), compared to the 150W/m-K offered by Silicon.[6]

Vehicles using the PE system

Hyundai

Genesis

Kia

References

  1. ^ "Interview with Researchers The Story of EV Technology on E-GMP". tech.hyundaimotorgroup.com. March 30, 2021.
  2. ^ "Vision FK, the world's high-performance eco-friendly hydrogen electric vehicle". tech.hyundaimotorgroup.com. September 7, 2021.
  3. ^ "Hyundai Motor Group to Lead Charge into Electric Era with Dedicated EV Platform 'E-GMP'". HYUNDAI MOTORS. Retrieved 2022-03-31.
  4. ^ "Electric Vehicle The Crux of Mobility's Sustainable Future". tech.hyundaimotorgroup.com. March 14, 2021.
  5. ^ "All you need to know about the motor of an electric car - Renault Group". www.renaultgroup.com. Retrieved 2022-03-30.
  6. ^ Lovati, Stefano (March 17, 2021). "10 Things to Know About SiC". www.powerelectronicsnews.com.
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