Electric motor test bench (Ilmenau)

Electric motor test bench Ilmenau
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The ongoing electrification of the drivetrain in cars and trains requires in-depth analyses of the drive, taking into account the respective boundary conditions and application scenarios.

The electric machine test bench is available for testing test specimens and is able to simulate the electrical energy sources present in the system, the mechanical load and various peripheral requirements. The test bench environment enables the testing of electrical drive trains or individual electrical machines and can be flexibly adapted to customer requirements. The facilities are located in the Thuringian Innovation Centre for Mobility (ThIMo-II) at TU Ilmenau.

Fields of application

 

Power and efficiency measurement of electrical machines

 

Thermal measurement

 

Technical data

 

Maximum drive power

400 kW

Maximum speed

8,000 rpm

Maximum torque

3,000 Nm

Shaft connection

Taper bush

Available components

 

Inverter

CAN, RS422

Input voltage

0-850 V

Power

160 kW / 320 kW

Output voltage

560 V AC

Output current

270 A Eff

Rotary encoder

Endat compatible

DC-Source

 

Power

120 kW

Current

720 A

Voltage

0 – 1000 V

Cooling water temperature control

90 kW cooling capacity / 6 kW heating capacity

Flow rate

up to 60 l/min

Pressure

up to 3.8 bar

Temperature range

20-90 degrees

Auxiliary voltage

5, 12, 24, 48 and 72 V

Measurement technology

HBM GEN7ta (CAN-Recording, 6 Phases)

Sampling rate

2 MS/s

Software

Perception

Sensors

LEM-Transducer IN500 (500Aac rms)

Torque

Kistler 3kNm and Kistler 100N

Temperature

Type K thermocouples

NVH-Analysis/Vibration measurement

A laser Doppler vibrometer is used to investigate the vibration behaviour of mechanical structures, here in the context of powertrain components (electric motors, wheel carriers, chassis) in the rail and road transport sector. The use of this measuring device makes it possible to carry out a detailed analysis in the area of NVH (noise, vibration, harshness) so that natural frequencies, vibration excitations and the resulting noise emissions can be determined. Depending on the type of measuring device, the vibration modes generated during the measurement are displayed graphically and three-dimensionally with the associated frequency, allowing quick and well-founded statements to be made about the vibrations that occur despite complicated structures.

Electric motor test bench (Ilmenau)
Test bench vibration measurement
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Fields of application

 

Vibration measurement

 

Harmonics of mechanical excitation

 

Harmonics of electromagnetic excitation

 

Evaluation of mechanical noise sources

 

Modal analysis

 

Polytec PSV Qtec Scanning Vibrometer

 

Frequency range

up to 20 kHz

Resolution

24 bit

Speed measuring range

25mm/s to 12,5 m/s

Scan angle H x V

50° x 40°

Shortest measuring distance

125 mm

Accessories

Modal hammer, reference sensor

Accelerometer HBK 4528-B-001

 

Quantity

4 units (can be used simultaneously)

Frequency range X, Y

0,3 Hz to 10 kHz

Frequency range Z

0,3 Hz to 12,8 kHz

max. acceleration

700 m/s² (71g)

Operating temperature

-60 to +165 °C

Evaluation software

 
 

BK Connect

Download our complete test bench catalogue.

Contact

Dr.-Ing. Frank Rinderknecht

Head of Research Area
German Aerospace Center (DLR)
Institute of Vehicle Concepts
Alternative Energy Conversion
Pfaffenwaldring 38-40, 70569 Stuttgart