AC dynamometer
The test equipment is the core of any automotive development and testing facility. Our drive dynamometers and load dynamometers at DynoEquip are the result of decades of automotive excellence and know-how. We offer AC dynamometers that are reliable, accurate, and adaptable for all kinds of applications.
Offering dynamometers by DynoEquip are extensive and dynamic, ranging from the testing of combustion engines and their components to the testing of entire drivetrains, EV or hybrid vehicle drivetrains, highly integrated e-drives, electric axle systems, and the primary electrification components such as EV gearboxes.
Besides, our AC dynamometers are suitable for various types of engines, from small off-road engines to large engines, with power levels ranging from 10 kW to 2,000 kW. They are also suitable for heavy-duty engine certification, calibration, research and development, and end-of-line testing requirements.
Asynchronous dynamometer (induction dynamometer)
The dynamometer is an essential component of the testing and development environment for automobiles. To meet practically any application and use scenario, DynoEquip has developed a portfolio of foot-mounted AC dynamometers using special asynchronous dynamometers (induction dynamometers). The dynamometers offer a great price-to-performance ratio, optimal modularization, and minimal test equipment downtime because they were created with the needs of the customer in mind. The customer development workflow will operate seamlessly with these dynamometers. Additionally, the application can be used for a variety of use cases, including NVH testing, emission development, mechanical development, and functional development of EV drivetrains. This is made possible by the modular design.
PM dynamometer (permanent magnet synchronous dynamometer)
The demands placed on test cells and dynamometers are rising as a result of shorter development cycles combined with more complex testing. The core component of a test cell is the AC dynamometer. That is the part that endures the most difficult operating circumstances. The foot-mounted PM dynamometers using special permanent magnet synchronous dynamometers is a development tool made specifically to meet testing requirements both now and in the future. It satisfies the rigorous requirements for rapidity and high performance while maintaining robustness and dependability.
EV e-motor testing
Asynchronous dynamometer
This AC dynamometer for testing is an effective tool for both dynamic and transient e-drive testing applications.
The dynamometer, combined with high-speed test equipment mechanics, is a vital component of DynoEquip test equipment. This dynamometer series provides a capable load unit solution for a variety of applications. High speed, high torque, and high power are all covered by its testing criteria. This allows you the highest flexibility and usage rates possible while also ensuring the future-proofness of the user’s testing capabilities.
Example of AC dynamometer: AMT1
Example of AC dynamometer: AMT6
Test piece: E-motors in passenger cars or light commercial vehicles
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| AMT1 | 260 | 500 | 17,000 | 0.37 |
| AMT2 | 400 | 750 | 16,000 | 0.29 |
| AMT3 | 470 | 940 | 15,000 | 0.53 |
| AMT4 | 300 | 600 | 15,000 | 0.44 |
| AMT5 | 500 | 1,200 | 14,000 | 0.56 |
** Parameters can be changed according to customer needs
Test piece: E-motors in commercial vehicles
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| AMT6 | 600 | 6,000 | 6,000 | 6.6 |
** Parameters can be changed according to customer needs
PM dynamometer
This synchronous permanent magnet dynamometer is powered by a high-performance 4Q-frequency converter. It provides the framework for all aspects of electrified drivetrain development, testing, verification, and validation. It has never been easier to undertake realistic testing activities at speeds up to 25,000 rpm and load alternations of current and future units under test (UUTs) because of the AC dynamometer’s superior electrical and mechanical characteristics and the converter’s rapid control capabilities.
A comprehensive environment for electrified drivetrain development, testing, verification, and validation is built around the testing PM dynamometer. Over the past few years, the test application field has expanded from analysis to include evaluation of electrical, mechanical, thermal, and acoustic characteristics. Comprehensive UUT development is made possible in crucial performance curve operating regions like the low speed and high torque ripple, thanks to integrated high precision torque and speed monitoring equipment. The stall braking systems that are available optionally can be used for stall tests. The AC dynamometer’s exceptional mechanical and electrical qualities, coupled with the converter’s quick control capabilities, allow it to cover realistic testing tasks and load alternations of both the current UUT and future generations.
Example of AC dynamometer: PMT4
Test piece: High-speed e-motors in passenger cars
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| PMT1 | 165 | 82 | 35,000 | 0.009 |
| PMT2 | 450 | 600 | 25,000 | 0.055 |
| PMT3 | 450 | 500 | 25,000 | 0.055 |
| PMT4 | 400 | 600 | 21,000 | 0.060 |
| PMT5 | 300 | 500 | 21,000 | 0.060 |
| PMT6 | 350 | 800 | 20,000 | 0.095 |
| PMT7 | 500 | 1,000 | 16,000 | 0.095 |
** Parameters can be changed according to customer needs
Drivetrain testing
Using asynchronous dynamometer
Example of AC dynamometer: ATT2
This versatile and reliable development tool was created specifically for use in gear unit or electric vehicle (EV) gearboxes and drivetrain test equipment. The modular architecture of this AC dynamometer allows for a variety of use cases, including NVH testing, functional EV drivetrain research, and emission development. This tool enhances testing capabilities and provides valuable insights into the performance and efficiency of drivetrain systems, making it essential for advancing modern gear unit and electric vehicle technologies.
Using PM dynamometer
Example of AC dynamometer: PTT2
Early in the development process, drivetrain calibration, concept verification, and system validation may all be carried out with great repeatability without the need for a prototype car. Replicating the acceleration rates of a wheel on ice is feasible when the load system’s inertia closely matches the wheel’s inertia. Every test scenario is perfectly matched as a consequence of the quick and precise torque control. DynoEquip’s PM dynamometer offers versatility at every level of development, from idea to standard operating procedure, by enabling the simulation of dynamic vehicle data. The system also has a very strong unique bearing concept. Lower lifetime expenses allow for maximum availability and a lengthy lifespan.
Test piece: Wheel hub (Using asynchronous dynamometer)
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| ATT1 | 400 | 5,000 | 4,500 | 4.4 |
| ATT2 | 350 | 4,200 | 4,000 | 3.5 |
| ATT3 | 300 | 3,700 | 3,500 | 2.4 |
** Parameters can be changed according to customer needs
Test piece: Wheel hub (Using PM dynamometer)
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| PTT1 | 300 | 4,000 | 3,000 | 0.85 |
| PTT2 | 250 | 3,000 | 3,000 | 0.62 |
** Parameters can be changed according to customer needs
Engine testing
The AC dynamometer used for engine testing is comprised of an asynchronous AC-induction dynamometer paired with a 4Q-frequency converter cabinet. When paired with accessories, it offers a special way to evaluate dynamic and transient engine applications professionally. The dynamometer series delivers an ideal mix between total cost of ownership and performance by fusing tried-and-true parts with cutting-edge ideas. Only a few performance classes are needed to accommodate a wide range of engines because of each dynamometer’s excellent power coverage. With fewer test equipment types, this guarantees maximum flexibility. The AC dynamometer is prepared for testing current and upcoming generations of combustion engines and hybrid engines thanks to its much-enhanced torque-to-inertia ratio.
The frequency converter cabinet features a high-speed interface to the controller and a quick torque increase time to produce actual vehicle load transitions. The maximum level of load condition repeatability is guaranteed by high-precision torque and speed monitoring equipment. This ensures that engine development will proceed quickly. Ultimately, optimal test equipment efficiency is ensured by its design for continuous, round-the-clock operation.
Example of AC dynamometer: AET5
Test piece: Gasoline engine
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| AET1 | 500 | 1,200 | 12,000 | 0.7 |
| AET2 | 300 | 1,000 | 12,000 | 0.7 |
| AET3 | 710 | 1,520 | 10,000 | 1.3 |
| AET4 | 250 | 600 | 10,000 | 0.17 |
** Parameters can be changed according to customer needs
Test piece: Diesel engine
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| AET5 | 900 | 5,000 | 4,500 | 6.6 |
| AET6 | 700 | 3,800 | 4,500 | 3.5 |
** Parameters can be changed according to customer needs
Coupled with gearbox for greater torque and higher speeds
The AC dynamometer series is specifically engineered to address the challenges associated with limited project budgets, particularly when it comes to utilizing high-current frequency converters. It also considers the constraints of space and weight that are often encountered with dynamometers used in on-site testing environments. By focusing on these critical factors, this dynamometer series provides a practical and cost-effective solution for various testing needs.
One of the standout features of this AC dynamometer series is its wide range of speed and torque coverage. Each dynamometer is capable of handling a broad spectrum of testing applications, which becomes even more effective when coupled with a gearbox. This versatility allows users to achieve high nominal torque and applicable speeds, enabling comprehensive testing across different scenarios. Whether it’s evaluating the performance of a gearbox, assessing drivetrain efficiency, or conducting durability tests, this AC dynamometer series can accommodate various requirements, making it an invaluable tool for engineers and researchers.
Additionally, this AC dynamometer solution is particularly well-suited for testing axles and drivetrains in heavy equipment applications. It can effectively support the testing of various machinery, including tractors, graders, bulldozers, compactors, excavators, articulated dump trucks, and loaders. By providing the necessary torque and speed capabilities, this dynamometer series ensures that heavy equipment can be evaluated under realistic operational conditions, ultimately leading to improved performance and reliability in the field.
Test piece: Large wheel hub, or drivetrain related tests
| Model | Rated torque (Nm) | Maximum speed (rpm) |
| AGT1 | 30,000 | 3,000 |
| AGT2 | 14,500 | 3,800 |
| AGT3 | 10,000 | 5,000 |
| AGT4 | 6,000 | 6,000 |
** Parameters can be changed according to customer needs
**Please click here for more information about dynamometer gearboxes:
Water-cooled AC dynamometer
The water-cooled AC dynamometer is an advanced type of asynchronous dynamometer that uses a water-cooling system to effectively manage heat. Unlike traditional air-cooled dynamometers, which can struggle with heat dissipation, the water-cooled version keeps operating temperatures lower. This not only helps to prolong the dynamometer’s lifespan but also creates a safer environment for laboratory operators by minimizing the risk of overheating. Additionally, it reduces the need for expensive air conditioning and ventilation systems, making it a more economical choice for testing facilities.
The cooling system typically includes pumps and radiators that can be placed outside the laboratory, which enhances cooling efficiency while keeping noise levels down. Water-cooled dynamometers operate much quieter than air-cooled ones, which rely on noisy fans. This design helps to protect operators from hearing damage and reduces noise pollution in the testing area, creating a more comfortable workspace.
Water-cooled AC dynamometers are particularly well-suited for end-of-line (EOL) testing. They ensure that finished products are tested under conditions that mimic real-world usage, while maintaining safe and efficient operations. Overall, the water-cooled AC dynamometer is a reliable and effective tool for modern testing applications, enhancing both performance and safety.
Test piece: Equipment used in NVH testing or EOL end-of-line testing
| Model | Rated power (kW) | Rated torque (Nm) | Maximum speed (rpm) | Inertia (kgm2) |
| AWC1 | 760 | 7,000 | 3,500 | 14.5 |
| AWC2 | 690 | 4,000 | 4,000 | 8.3 |
| AWC3 | 325 | 3,000 | 4,000 | 3.9 |
| AWC4 | 250 | 2,000 | 6,000 | 3.8 |
| AWC5 | 190 | 570 | 12,000 | 0.47 |
| AWC6 | 173 | 430 | 15,000 | 0.36 |
Advantages of AC dynamometer (transient electric AC dyno)
- The AC dynamometer can be operated in four quadrants, either as generating or as motoring. It can be loaded clockwise or anti-clockwise.
- Energy saving and environmental protection. Significant energy-saving effect can make mechanical energy convert into electrical energy and feedback to the grid.
- The load characteristics are very good. The constant torque load can be maintained within the rated speed, even under blocked or reversed rotation. This is particularly suitable for small torque testing. The constant power load can be maintained above the rated speed.
- The transient electric AC dyno can have constant torque (loading) or constant speed (generating mode) two working methods to adapt the different test requirements.
- Constant torque and constant speed load control stability is much better than other loading methods. It maintains extremely high stability at full speed range (even at zero speed) and torque.
- Alarm protections such as overload, overspeed, overvoltage, overcurrent, overheat, phase loss, fluctuations, etc.
Three phase AC dynamometer possess the following features
- Minimal maintenance and therefore increasing test bench availability
- Small space requirement due to compact design
- Steady state and dynamic test condition due to integrated accurate torque measurement flange
- High speed dynamometer up to speed of 35,000 rpm with low vibration and noise level
- Special end-shield design with integrated cooling circuit bringing high AC dynamometer stiffness
- High dynamic testing due to low rotor moments of inertia