Drivetrain test beds
Drivetrain test beds are used to examine individual components or assemblies. Single parts (such as a gearbox) or entire assemblies (gearbox, prop shaft and differential) can be assembled as complete drivetrains in a variety of test bed configurations. Configuration 2M indicates the use of two dynamometers. For example, one dynamometer can be connected to the gearbox input shaft and the second to the gearbox output shaft to simulate different transmission loads.
The 3M test bed is equipped with three dynamometers for measuring drive axles with differentials. For example, the prop shaft and the wheels of a powered rear axle can be replaced by dynamometers. This arrangement makes it possible to simulate a huge variety of loads, as when driving through curves. The dynamometers on the wheels simulate the road, while the dynamometer of the prop shaft simulates the engine. The tests can be performed on drivetrains of both combustion engine vehicles and hybrid or electric vehicles.
The e-drive test bed is a 1M or 2M test bed which is supplemented by a battery simulator. This replaces the HV battery so that testing remains independent of charging times. Furthermore, it enhances operating safety as stringent safety requirements apply when using a HV battery in tough test bed testing.
E-DRIVE-90 (battery emulator)
The E-DRIVE-90 test bed includes a 90 kW asynchronous machine which permits 4 quadrant operation at up to 8000 rpm. The testing facility also houses a battery simulator which can supply voltages between 5 to 600 V, currents of up to 600 A, and 150 kW power. This allows electrical systems such as motors, batteries and inverters to be tested and approved either as individual components or collectively.
Specifications
- Automation software Tornado 5
- Battery simulator 150 kW
- Asynchronous motor 90 kW
E-DRIVE-400
The E-DRIVE-400 test bed is similar to the E-DRIVE-90 except that it can achieve higher performance levels and features a 2M configuration. The two asynchronous machines can be applied in 4 quadrant operation at up to 4000 rpm. The nominal torque is 3200 Nm and the power output 376 kW. It also includes a battery simulator with a voltage range of up to 1200 V. Power output of 400 kW and a maximum current of 800 A are available.
Specifications
- Automation software: Tornado 5
- Road load and wheel slip simulation
- Reduction gear for higher speeds
- Battery simulator up to 1200 V and 800 A at 400 kW
- Suitable for continuous operation