HYBRID CONTROL SYSTEM


  1. CONSTRUCTION


    1. Inverter with Converter Assembly


      1. The inverter with converter assembly has a multi-layer structure which consists of the Motor Generator ECU (MG ECU), boost converter, inverter, condenser and hybrid vehicle converter assembly (DC-DC converter), achieving a lightweight and compact design.

      2. The inverter with converter assembly is cooled by the dedicated radiator of a cooling system that is separate from that of the engine cooling system.

      3. This inverter has a cooling system with a structure that makes it possible to cool the Insulated Gate Bipolar Transistors (IGBTs) of the boost converter and the inverter from both sides, contributing to a compact design.

      4. In consideration of safety, interlock switches are provided for the inverter with converter assembly. The interlock switches turn off the System Main Relays (SMRs) when the inverter terminal cover or connector cover assembly is removed or the connector of the power cable is disconnected.

        A004CP6C01
        *A LHD Models *B RHD Models
        *1

        Boost Converter/Inverter Portion


        • Motor Generator ECU (MG ECU)

        		 *2 Condenser/Hybrid Vehicle Converter Assembly (DC-DC Converter) Portion
        *3 Inverter Hybrid Connector Assembly *4 Interlock Switch
        *5 Connector Cover Assembly *6 Inverter Terminal Cover
        *a Coolant Inlet *b Coolant Outlet
        B0049P9 Coolant Flow - -
        A004C60E02

    2. Motor Generator ECU (MG ECU)


      1. The MG ECU is provided in the inverter with converter assembly. In accordance with signals received from the hybrid vehicle control ECU assembly, the MG ECU controls the boost converter and inverter in order to drive MG1 or MG2 or to cause them to generate electricity.

      2. The MG ECU transmits information that is required for vehicle control, such as the inverter output amperage, inverter temperature and failure information, to the hybrid vehicle control ECU assembly. The ECU receives information that is required for controlling the motor generators, such as the required motive force or the motor temperature, from the hybrid vehicle control ECU assembly.

    3. Inverter Current Sensor


      1. For the 3-phase AC used to drive MG1 and MG2, there are current sensors for the V and W phases. The actual current value is measured, and used as feedback by the MG ECU.

      2. If the current value of 2 phases (V and W phases) is measured, the current of the U phase can be determined, even though it is not equipped with a current sensor (U phase current + V phase current + W phase current = 0).

        A004CURE05

    4. Inverter Temperature Sensor


      1. In the inverter with converter assembly, there are 5 different temperature sensors: 1 sensor for the coolant temperature, 2 for the boost converter and 1 each for the Power Modules (PMs) for MG1 and MG2.

      2. The MG ECU confirms the effectiveness of the inverter cooling system based on the temperature information sent from these sensors. In addition, inverter output is limited when the temperature is high.

        A004CV0E01