Framework for sensitivity analysis of industry algorithms for sensorless PMSM drives

Benjamin Phillip Saunders, Greg Heins, Friso De Boer

    Research output: Chapter in Book/Report/Conference proceedingConference Paper published in Proceedingspeer-review


    The Permanent Magnet Synchronous Machine (PMSM) is gaining popularity in many applications due to its high efficiency and high power density. In order to achieve efficient and robust motor operation, motor position information is required. If active compensation of motor torque ripples is to be achieved in addition to simply rotating the motor the quality of the position information becomes even more important. Traditionally this position information is acquired through the use of a position sensor, however so called `sensorless' control schemes are now becoming a popular alternative. This paper presents a review of the sensorless position estimation algorithms which are being adopted by industry. A framework is developed to assess the sensitivity of these algorithms to errors in motor parameters and non-ideal aspects of the motor and controller. This framework is based around a MATLAB®/Simulink® simulation which includes these non-ideal aspects. The simulated control loop is designed to be very close to the control loop implemented on a DSP and used to run a real motor. Results for a simple back-EMF estimator show that a 10-bit or better analog to digital converter (ADC) gives good performance, the position estimation error is almost insensitive to resistance variation and a 20% change in inductance results in a 0.7% offset error in the position estimate.
    Original languageEnglish
    Title of host publication21st Australasian Universities Power Engineering Conference
    EditorsGerard Ledwich
    Place of PublicationBrisbane, Australia
    PublisherAustralasian Universities Power Engineering Conference (AUPEC)
    Number of pages6
    ISBN (Print)978-1-4577-1793-2
    Publication statusPublished - 2011
    EventAustralasian Universities Power Engineering Conference (AUPEC 2011 21st) - Brisbane, Australia, Brisbane, Australia
    Duration: 25 Sept 201128 Sept 2011
    Conference number: 2011 (21st)


    ConferenceAustralasian Universities Power Engineering Conference (AUPEC 2011 21st)
    Abbreviated titleAUPEC


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