Pulse Counting Sensorless Detection of the Shaft Speed and Position of DC Motor Based Electromechanical Actuators

Antonio Testa; Salvatore De Caro; Tommaso Scimone; Romeo Letor

Pulse Counting Sensorless Detection of the Shaft Speed and Position of DC Motor Based Electromechanical Actuators

Vol. 14, No. 5, pp. 957-966, Sep. 2014

10.6113/JPE.2014.14.5.957

Automotive

DC actuators

Sensorless position control

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Abstract

Some of DC actuators used in home automation, office automation, medical equipment and automotive systems require aposition sensor. In low power applications, the introduction of such a transducer remarkably increases the whole system cost,which justifies the development of sensorless position estimation techniques. The well-known AC motor drive sensorlesstechniques exploiting the fundamental component of the back electromotive force cannot be used on DC motor drives. Inaddition, the sophisticated approaches based on current or voltage signal injection cannot be used. Therefore, an effective andinexpensive sensorless position estimation technique suitable for DC motors is presented in this paper. This technique exploitsthe periodic pulses of the armature current caused by commutation. It is based on a simple pulse counting algorithm, suitable forcoping with the rather large variability of the pulse frequency and it leads to the realization of a sensorless position controlsystem for low cost, medium performance systems, like those in the field of automotive applications.

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Cite this article

[IEEE Style]

A. Testa, S. D. Caro, T. Scimone, R. Letor, "Pulse Counting Sensorless Detection of the Shaft Speed and Position of DC Motor Based Electromechanical Actuators," Journal of Power Electronics, vol. 14, no. 5, pp. 957-966, 2014. DOI: 10.6113/JPE.2014.14.5.957.

[ACM Style]

Antonio Testa, Salvatore De Caro, Tommaso Scimone, and Romeo Letor. 2014. Pulse Counting Sensorless Detection of the Shaft Speed and Position of DC Motor Based Electromechanical Actuators. Journal of Power Electronics, 14, 5, (2014), 957-966. DOI: 10.6113/JPE.2014.14.5.957.