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3-drive Test Bench HAP01

Function and layout


Configuration 1: Test rig for electric drive system

The electric drive system is supplied by a battery simulator. It drives a
flywheel mass via connecting shafts on each output side. Two electric
motors simulate vehicle speed and dynamic load.


 Configuration 2: Electric motor test rig

The electric motor is supplied by a battery simulator.
The output side of this electric motor is coupled to an electric load motor via a transmission with various ratios. This simulates the vehicle speed
and dynamic load.

Configuration 3: Test rig for gearbox or transmission

One electric motor drives the input side of the test sample (test axle, gearbox).
Each output side is coupled to an electric motor.
These electric motors can simulate the vehicle speed and the dynamic load.

A water cooling system to supply cooling of the test sample isavailable.


Electric motor drive side:
DC electric motor type Siemens 1HS5, water cooled,
planetary gearbox with overdrive 3,889 : 1 (optional 1 : 1)
flywheel mass (if requested)
 max. power output: 352 kW
 max. torque output:1800 Nm (7200 Nm)
 max. speed:7000 rpm (1800 rpm)
Electric Motors coast side:
asynchronous electric motors type Siemens 1PA6, air cooled
 max. power input:147 kW each
 max. torque input: 1050 Nm each
 max. speed:4500 rpm
Electric power supply:battery simulator, type Kratzer VES 150/500/500
 max. power:+/- 150 kW
 voltage:10 – 500 V
 current:+/- 500 A
 battery model:three implemented models,
further models are programmable
 communication:via CAN-Bus / Profibus DP


Possible Set-ups

Testing of longitudinal rear wheel drivelines (RWD)
Testing of longitudinal gearboxes (RWD)
Testing of transversal gearboxes (FWD)
Testing of front or rear wheel differential transmissions


Testing purposes

Run-in of gearboxes and differentials
Functional tests and endurance tests of drivelines and driveline sub-systems
NVH investigations of drivelines and components
Efficiency measurements


Operating methods

Manual operation
Automatic operation controlled by hofer software PLS (e.g. ramp functions)
Endurance test operation based on real road data (24 h operation)


Measurement technology

Torque measurement (input and output side)
Speed measurement (input and output side)
Oil temperature of test sample
CAN bus system for communication with the test sample
Additional measuring equipment
if requested

© hofer 2007