COM4LAB: Automotive Hybrid Drives

The workstation includes a hybrid engine with rotor position sensor, a (surrogate) combustion engine as well as a propulsion unit (combining gears, roll resistance of the tires and air resistance) in 24 V technology as parallel hybrid.

The device is equipped with simulated battery cells which makes it totally maintenance free. Thus it is possible to set different required states of charge (SOC) on purpose.

By a mechanism the hybrid engine can be decoupled from the combustion engine and from the gears separately. The engine speed and power and therewith the moment distribution of the engines can be adjusted individually by potentiometer with the integrated power electronics (pulse-controlled inverter). Thus following operating conditions can be analyzed experimentally:

• Hybrid drive
• Electric drive
• Boost
• Generator mode
• Recuperation by braking

Furthermore, evaluations on safety, high-voltage technology and digital data transmission can be performed, such as:

• Function of the pilot line
• Function of the service disconnect plug
• Technology of DC/AC conversion
• High-voltage switch-on procedure with precharging
• Equipotential resistance measurment
• Digital data transmission using highspeed CAN bus

Both the engines and the power electronics can be connected to measurement devices. Additionally, the workstation includes an exemplary high-voltage vehicle electrical system and the 12 V vehicle power supply. Moreover the high-voltage vehicle electrical system powers the 12 V vehicle power supply via an integrated DC/DC converter.

Software

The control and evaluation is are solely be done using a Windows PC connected to the USB port of the device. Running the COM4LAB CBT software 739 9403-20  step-by-step experiments can be done. Firmware updates are also possible to keep the system up to date.