HBK’s T11 torque transducer set new standards in terms of the nominal (rated) rotational speed in 2004. The T11 was long considered the standard in motorsport, and it could reach a rotational speed of up to 30,000 rpm due to its small rotor mass and low mass moment of inertia. The sensor was continuously developed and was replaced by the T40 series in 2016.
Alongside an increased nominal (rated) rotational speed of up to 45,000 rpm, the latest transducer generation has EtherCAT and PROFINET interfaces; it is thus ideal for dynamic applications and considerably facilitates the integration of torque and rotational-speed measurements into higher-level automation and control systems.
In addition to their increased rotational speed, the dynamic behavior of electric drives places high requirements on future e-mobility test-bench concepts. Accordingly, the further reduction of mass moments of inertia and weight ranked high on the list of development targets. However, the optimization of electric power trains places further demands on the measurement systems. In view of an energy conversion efficiency of over 90 % and in contrast to the situation with combustion engines, very high requirements must be placed on the measuring equipment’s accuracy to enable differences between the respective variants to be implemented.