The recent activity of the authors, concerning different types of small PM machines, brought to the necessity to measure the respective cogging torques. Normally such a measure (including the hysteresis and bearing torque components), is realized with a prime motor to drag the machine under exam at very low speed and adopting a very good gearbox (classical method). During the activity a new method has been introduced adopting a step motor dragging directly the machine to be tested. The measure has been carried out with both systems; the results obtained with the classical method constitute the reference for the new one adopting the step motor, with a very good agreement. The reason to adopt the new method is related to the great elasticity which the step motor and its control may allow; that appears useful, for example, to try to separate the actual cogging torque from the hysteresis and bearing torque components, which results impossible with the classical method.

The cogging torque measurement through a new validated methodology / Ferraris, Luca; Franchini, Fausto; Poskovic, Emir. - ELETTRONICO. - (2017), pp. 398-403. (Intervento presentato al convegno 11th IEEE International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2017 tenutosi a esp (Cadiz) nel 2017) [10.1109/CPE.2017.7915204].

The cogging torque measurement through a new validated methodology

FERRARIS, Luca;FRANCHINI, FAUSTO;POSKOVIC, EMIR
2017

Abstract

The recent activity of the authors, concerning different types of small PM machines, brought to the necessity to measure the respective cogging torques. Normally such a measure (including the hysteresis and bearing torque components), is realized with a prime motor to drag the machine under exam at very low speed and adopting a very good gearbox (classical method). During the activity a new method has been introduced adopting a step motor dragging directly the machine to be tested. The measure has been carried out with both systems; the results obtained with the classical method constitute the reference for the new one adopting the step motor, with a very good agreement. The reason to adopt the new method is related to the great elasticity which the step motor and its control may allow; that appears useful, for example, to try to separate the actual cogging torque from the hysteresis and bearing torque components, which results impossible with the classical method.
2017
9781509049639
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2675041
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