Phd Defense - Sensorless Load Angle Detection for Brushless Direct Current and Stepping Motors - Jasper De Viaene

When
25-05-2020 from 17:00 to 19:00
Where
Digital video conference
Language
English
Organizer
Jasper De Viaene
Contact
jasper.deviaene@ugent.be
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Sensorless Load Angle Detection for Brushless Direct Current and Stepping Motors

Summary

The possibility to accurately position without the need for a position sensor makes stepping motors very appealing for positioning applications. However, drawbacks of the cheap and easy to use open-loop control are the continuous risk of missing a step due to overload, the high torque ripple and low efficiency.

In addition, BLDC motors are particularly outspoken for speed varying applications. Literature shows that the control method can be improved by controlling a BLDC motor with sinusoidal currents instead of square-wave currents. Unfortunately, feedback techniques typically used in BLDC motors to determine the commutation moments are inadequate for sinusoidal current setpoint generation.


In this study, a sensorless feedback mechanism indicating the actual load and a controller preventing step loss, without noticeably increasing the cost, is proposed for stepping motor applications. In parallel, a computationally simple sensorless method that uses sinusoidal currents to increase the efficiency of BLDC motors is developed.

Live-stream

Bongo virtual classroom event: https://bit.ly/35C4C6N

How

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