Components And Components Location

Components










Inverter (MCU)
The inverter supplies high voltage electric power to 2 major motors (traction motor, HSG). Depending on the driving conditions, the inverter communicates with the previously mentioned control devices (such as the HCU) and optimizes the 2 motors according to the driving conditions. Depending on the driving conditions, the traction motor and the HSG motor may take on the role of an alternator. In such case, the inverter takes on the role of a converter. The definition, concept and in-depth description of the inverter and the converter are detailed in another section.

Control Board
One CPU controls 2 motors (the traction motor and HSG motor). In addition to the basic function of motor control, the control board has supplementary features of protecting the motors, inverter and power module from overheating, preventing reverse rotation, detecting failure, and providing a motor temperature compensation circuit.

Capacitor
The capacitor is a form of auxiliary electricity storage device. It stores electricity during normal conditions and assists the power when voltage is unstable. A maximum of 600V, or approximately 600 muF capacitor is applied. With such capacitor back-up, it takes some time before power depletion is complete, even when the high voltage battery is removed (when the safety plug is removed).
It takes a maximum of 2 minutes for the battery to fall below 60V after the removal of the safety plug.

Current Sensor
The current sensor detects the electric current flowing to the motor and is used to control the current phase flowing into the motor from the motor controller. The sensors for the motor and for the HSG are different, and the current sensor is internally connected to the power module.

Power Module
It converts DC power to AC due to the high speed switching. Capacities of 400A are used for the traction motor and 200A for the HSG respectively.

Heat Sink
The heat sink is a heat shield device. A water cooling system is utilized for the HPCU, and an aluminum heat sink is used to maximize the cooling effect.
Each of the components in the diagram is illustrated to help understand the internal structure. It is actually assembled with a liquid gasket so it cannot be taken apart.