XtreMA High Precision TORQUE - The improved torque transducer

High precision torque transducers for maximum efficiency in vehicle development

In the wake of CO₂ discussions, the requirements for the accuracy and resolution of torque measurement signals are constantly increasing. Precise torque transducers are essential for optimizing efficiency in particular, in order to ensure dynamic torque measurements with maximum accuracy.

The solution: XtreMA high precision torque transducers from MANNER

With the new XtreMA high precision product range, MANNER Sensortelemetrie offers an innovative solution for highprecision torque measurement. These torque transducers impress with maximum measurement accuracy, flexible application options, and easy integration into existing test bench systems.

Torque transducers as test bench measuring equipment for combustion engines, hybrid and electric drives

Precise torque measurement is a key factor in the development of combustion engines, hybrid and electric modules – especially on test benches for validation. As optimization potential becomes increasingly refined, high-resolution torque transducers are required to measure even the smallest increases in efficiency.

The new XtreMA high precision TORQUE series offers an improved alternative to conventional torque flanges. It enables precise measurements under real test conditions – from idle to partial load to full load and across a wide operating temperature range.

Flexibility and easy integration into test benches

A key advantage of the new torque transducers is their high flexibility. Thanks to the DIN flange pattern used, which is compatible with HBM torque sensors, the sensors can be easily integrated into existing or new test bench concepts (retrofit).

The optional hollow shaft design offers additional scope for coaxial drive concepts. This allows additional drive trains or cables to be routed inside the measuring flange – a decisive advantage for modern test benches.

Conclusion

The new XtreMA high precision product series from MANNER sets new standards in torque measurement. These high precision torque transducers not only offer maximum accuracy, but also maximum flexibility for a wide range of test bench applications.

Highest precision and speed stability for demanding test bench applications

The XtreMA high precision torque transducers impress with their exceptional accuracy. The flange series is specified with accuracy class 0.05 as standard. In the extended version, accuracy class 0.01 is even available – ideal for high-precision measurement requirements.

Maximum speed stability for electric motor test benches

Extremely high speed stability is essential, especially for test benches in the field of electromobility. The innovative MANNER design meets this requirement with impressive speed stability of up to 32,000 rpm. This makes the torque transducers perfectly suited for high-speed applications.

Outstanding features of the XtreMA high precision torque transducers

The class accuracy is only valid for a ∆T 10°C at a nominal temperature of +22°C. At outside this range, the errors, zero drift Tk0 and sensitivity TKc, increase considerably. The main source of error is the behavior of the torsion body itself – both the zero drift and the measured value errors must be mentioned here. The temperature dependence of these error types is serious.

The measured value error is significantly influenced by the modulus of elasticity. Depending on the quality of the steel, the E-module deviates by up to 24%/100°C. The error of a measuring amplifier is here smaller by more than a power of ten and thus subordinate to other sources of error, such as the drift of the Young’s modulus.

As is well known, both the drive machine and the test specimen supply considerable thermal energy when operating under full load. This leads inevitably to the fact that the heating of the measuring flange is beyond the specification of the class accuracy. A fatal situation for friction power measurements.

Especially in test benches for combustion engines, the measuring flange is additionally heated by the waste heat of the engine during operation. Due to the proximity to the engine, the shaft temperature can rise up to +160°C.

Air conditioning of the flange, in turn, is often hardly possible. Therefore, the influence of the increased ambient temperature on the measured values is a common problem in reality.

Particularly noteworthy is the flexible topology of torque acquisition with MANNER. The contactless, inductive sensor telemetry transmission technology guarantees maintenance-free operation.

Due to the simple tapping of the measuring signal by means of a simple, space-saving pick-up (no enclosure necessary) and a distance of up to 10 mm, uncritical operation is possible even with shaft vibration. The compact design of the evaluation unit with integrated pick-up makes handling particularly easy.

Optionally, the Pick Up can also be remotely connected to the evaluation unit via a cable connection.

A characteristic feature is that the extremely compact pick-up allows signal pickup even in cramped installation conditions (shaft protection). Of course, the pick-up can also be exposed to the extended environmental temperature range.

In another special variant, the Pick Up can be mounted up to 40 mm from the measuring flange. It is a complete evaluation unit with integrated antenna and speed measurement. A collision is practically impossible. This is particularly advantageous for construction machine test benches or drive shaft applications.