A Sensorless PMDC Motor Speed Controller with a Logical Overcurrent Protection

M. G. Guerreiro; D. Foito; A. Cordeiro

A Sensorless PMDC Motor Speed Controller with a Logical Overcurrent Protection

M. G. Guerreiro

D. Foito

A. Cordeiro

Vol. 13, No. 3, pp. 381-389, May 2013

10.6113/JPE.2013.13.3.381

PMDC motor

Sensorless speed control

Sliding mode control

Speed and torque observers

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Abstract

A method to control the speed or the torque of a permanent-magnet direct current motor is presented. The rotor speed and the external torque estimation are simultaneously provided by appropriate observers. The sensorless control scheme is based on current measurement and switching states of power devices. The observers performances are dependent on the accurate machine parameters knowledge. Sliding mode control approach was adopted for drive control, providing the suitable switching states to the chopper power devices. Despite the predictable chattering, a convenient first order switching function was considered enough to define the sliding surface and to correspond with the desired control specifications and drive performance. The experimental implementation was supported on a single dsPIC and the controller includes a logic overcurrent protection.

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Cite this article

[IEEE Style]

M. G. Guerreiro, D. Foito, A. Cordeiro, "A Sensorless PMDC Motor Speed Controller with a Logical Overcurrent Protection," Journal of Power Electronics, vol. 13, no. 3, pp. 381-389, 2013. DOI: 10.6113/JPE.2013.13.3.381.

[ACM Style]

M. G. Guerreiro, D. Foito, and A. Cordeiro. 2013. A Sensorless PMDC Motor Speed Controller with a Logical Overcurrent Protection. Journal of Power Electronics, 13, 3, (2013), 381-389. DOI: 10.6113/JPE.2013.13.3.381.