Created for a quantum leap.

High-dynamic load system for e-motor testing with unprecedented control quality.

SPECTRA - E-Motor Dyno

The rapid increase in electrified mobility continues to push the demand for versatile e-drive testing solutions. Relying on our seven decades of automotive development experience, we have developed the SPECTRA™ E-Motor Dyno PMM, an e-drive load unit that you can use for a variety of development applications and test cases.

The power, torque and rotating speeds of modern traction e-motors are steadily rising, which also increases the levels of performance expected from capable testing solutions. In addition, e-motor test cases are often more demanding than their ICE counterparts. Some of them require the load system to provide high dynamics and short response times. The ever-increasing levels of e-motor performance favor future-proof and upgradable solutions in order to be ready for today’s and tomorrow’s testing demands. Furthermore, the shift from ICE-powered towards electrified vehicles is creating  demand for the transformation of existing ICE test cells into e-motor test cells. This requires compact and size-optimized load systems.

Dyno PMM

State-Of-The-Art Technology for Best-In-Class E-Motor Testing

Silicon carbide (SiC) technology power electronics provides high switching frequencies without current derating and makes additional motor chokes obsolete. An integrated control unit that uses Field Programmable Gate Array (FPGA) technology carries out all control tasks with a control frequency of up to 192 kHz. The AVL SPECTRA E-Motor Dynos are equipped with oil-lubricated bearings and hybrid cooling technology. High precision bearings reduce vibrations to extremely low levels. The combination of AVL SPECTRA converter and dyno form a highly capable load system covering test requirements with the highest rotational speeds as well as delivering high torque and power.


Max. Speed

up to 30,000 rpm
Nom. Torque up to 650 Nm
Nom. Power up to 550 kW
Inertia 0.06 0.13 kgm²
Bearing Lifetime > 20,000 h over full speed range
Vibration Level < 1 mm/s over full speed range
Highest Efficiency

Minimized switching losses result in increased efficiency, reduced carbon footprint and a decreased total cost of ownership (TCO).

Outstanding Control Performance

Control cycle times up to 1 MHz are required for highly dynamic test cases such as pothole driving.

Maximum Availability

Oil-lubricated, high precision bearings ensure lowest vibration levels and maximized bearing lifetime, no matter the operating range.

Space and Cost Saving

Up to 60 % smaller converter cabinet footprint enables the upgrade of existing engine test cells or reduces space requirements in new buildings.

Modular and Upgradeable

The modular design ensures upgradeability and is also highly beneficial when it comes to serviceability.

Superior Control

The ultra-fast 1MHz control cycle reduces dead times and enables the execution of highly dynamic test cases. In addition, the minimized current ripple reduces the occurrence of dyno torque ripple.

High Switching Frequency Without Derating

SiC power electronics are capable of high switching frequencies without the drawback of current derating and make additional motor chokes obsolete.

High-precision Bearing Technology

Highly precise and oil-greased bearings keep vibration levels to a minimum and ensure maximized bearing lifetime over the whole operating range.

AVL SPECTRA™ Performance Line – Brochure

Superior Technology – with AVL SPECTRA™ Inside.

AVL E-Mobility Testing Solutions – Brochure

Tested and Trusted.

AVL SPECTRA™ E-Motor Dyno Converter – Solution Sheet

Frequency converter system for high speed/high power/high torque dynamometer for e-drive testing.

AVL SPECTRA™ Wheel Dyno – Solution Sheet

Our highly dynamic load system helps you test your powertrain:

AVL SPECTRA™ Universal Inverter – Solution Sheet

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The SPECTRA converter system is a modular silicon carbide (SiC) converter able to control wheel dynos at unprecedented levels of control accuracy and dynamics thus helping you to test your powertrain with confidence.

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Customer Services for Testing Solutions

The AVL Customer Services organization consists of more than 700 service- and application engineers worldwide, operating from more than 50 locations. Our global footprint is your local benefit.


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