Torque Ripple Estimation and Minimisation Independent of Sensor Type

Damien Hill, Greg Heins, Friso De Boer, Benjamin Phillip Saunders

    Research output: Chapter in Book/Report/Conference proceedingConference Paper published in Proceedings

    Abstract

    Torque ripple exists at the output of permanent magnet synchronous motors (PMSMs) as a result of current error, non-sinusoidal back-EMF and cogging torque. Since part of the cogging torque component is based on manufacturing error, motor design may not eliminate all torque ripple. One possible method for reducing torque ripple is by injecting the inverse of a torque ripple estimate to the current controller. Torque estimators that include cogging torque rely on feedback from different sensors such as vibration sensors and accelerometers, microphones, speed and torque sensors. This paper outlines a control method that can utilize any sensor with a linear transfer function between the torque and the sensor input. The method determines an estimate of the torque ripple for a number of harmonics simultaneously, as well as the transfer function between the torque and the sensor. Experimental results show different sensor types provide similar estimates of the torque with less than 2% variation in magnitude for the sensor types used. Experimental results show that regardless of which sensor type is used, critical torque harmonics are reduced by at least a factor of 3.
    Original languageEnglish
    Title of host publication2011 IEEE International Electric Machines and Drives Conference (IEMDC)
    Place of PublicationNew Jersey
    PublisherIEEE, Institute of Electrical and Electronics Engineers
    Pages463-468
    Number of pages6
    ISBN (Print)978-1-4511-0061-3
    DOIs
    Publication statusPublished - 2011
    EventIEEE International Electric Machines and Drives Conference (IEMDC) 2011 - Canada
    Duration: 15 May 201118 May 2011

    Conference

    ConferenceIEEE International Electric Machines and Drives Conference (IEMDC) 2011
    Period15/05/1118/05/11

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  • Cite this

    Hill, D., Heins, G., De Boer, F., & Saunders, B. P. (2011). Torque Ripple Estimation and Minimisation Independent of Sensor Type. In 2011 IEEE International Electric Machines and Drives Conference (IEMDC) (pp. 463-468). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/IEMDC.2011.5994639