Hyundai Ioniq: Hybrid Motor Control System / Motor Control Unit(MCU). Components and components location

Hyundai Ioniq (AE) 2017-2024 Service Manual / Hybrid Motor System / Hybrid Motor Control System / Motor Control Unit(MCU). Components and components location

Component location

1. HPCU (Hybrid Power Control Unit)
2. Hybrid drive motor
3. Hybrid starter generator (HSG)
4. Electrical radiator
5. Electric water pump (EWP)


1. HPCU (Hybrid Power Control Unit)
2. HPCU tray
3. HPCU cover
4. Integrated board (MCU / HCU / LDC)
5. Shield plate
6. Capacitor
7. Current sensor module
8. Gate board + Power module
9. Heat sink (water - cooled)
10. LDC (Low voltage DC - DC Converter)
11. High - voltage junction box

Inverter (MCU)
An inverter supplies AC current to the drive motor and HSG.
Depending on the driving conditions, the drive motor and HSG of the integrated board (control board) may act as a generator.
Integrated board (control board)
One CPU controls two motors (drive motor and HSG)
Sensors send the position, current, and temperature information to the CPU. The CPU generates the pulse width modulation signal and sends it to the gate board.
Capacitor is an energy storage device for smoothing the current.
Current sensor
Current sensor measures the current that flows through the motor, and is attached to each phase of a 3 - phase busbar.
Power module
Power module has six switches that are used to convert DC current to AC current.
Heat sink
Heat sink dissipates the heat of the coolant and is located between the power module and the cooling path.

    Description and operation

    DescriptionIn a hybrid electric vehicle, HCU (an upper level controller), LDC (power converter), and inverter are integrated in the HPCU. HPCU is located on the left side of the engine compartment...

    Motor Control Unit(MCU). Schematic diagrams

    Diagram System CircuitA high-capacity power module is applied to the two high-voltage motors.The power module consists of a high - speed switching circuit that is isolated from the IGBT and DIODE circuits...

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    Hybrid Vehicle Interior Overview

    Hyundai Ioniq. Hybrid Vehicle Interior Overview

    1. Door lock/unlock button
    2. Driver position memory system
    3. Side view mirror control switch
    4. Central door lock switch

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