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A back-EMF threshold self-sensing method to detect the commutation instants in BLDC drives

Araz Darba (UGent) , Frederik De Belie (UGent) and Jan Melkebeek (UGent)
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Abstract
By predicting future phase-current commutation instances of brushless dc (BLDC) machines, self-sensing control is achieved. Detection of the back electromotive force (EMF) zerocrossing moments is one of the methods used to predict the phasecurrent commutation instances. Most of the techniques based on back-EMF zero-crossing detection have the inherit disadvantage of an indirect prediction of commutation instances. This is the result of the commutation instance occurring 30??? electrical position after the zero-crossing of the induced back-EMF in the unexcited phase. Often, the time difference between the zero crossing of the back-EMF and the current commutation instance is assumed constant. This assumption can be valid for steadystate operation, however a different time span should be taken into account during transient operation of the BLDC machine. To overcome this problem an enhancement is proposed here which improves the performance while keeping the simplicity of the back-EMF zero-crossing detection method.
Keywords
VOLTAGE DIFFERENCE, POSITION SENSORLESS DRIVE, BRUSHLESS DC MOTOR, SYSTEM, RANGE, Brushless machines, field-programmable gate arrays (FPGAs), permanent-magnet machines, self-sensing control, NEUTRAL VOLTAGE

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Citation

Please use this url to cite or link to this publication:

Chicago
Darba, Araz, Frederik De Belie, and Jan Melkebeek. 2015. “A back-EMF Threshold Self-sensing Method to Detect the Commutation Instants in BLDC Drives.” Ieee Transactions on Industrial Electronics 62 (10): 6064–6075.
APA
Darba, A., De Belie, F., & Melkebeek, J. (2015). A back-EMF threshold self-sensing method to detect the commutation instants in BLDC drives. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 62(10), 6064–6075.
Vancouver
1.
Darba A, De Belie F, Melkebeek J. A back-EMF threshold self-sensing method to detect the commutation instants in BLDC drives. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. IEEE; 2015;62(10):6064–75.
MLA
Darba, Araz, Frederik De Belie, and Jan Melkebeek. “A back-EMF Threshold Self-sensing Method to Detect the Commutation Instants in BLDC Drives.” IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 62.10 (2015): 6064–6075. Print.
@article{5935606,
  abstract     = {By predicting future phase-current commutation instances of brushless dc (BLDC) machines, self-sensing control is achieved. Detection of the back electromotive force (EMF) zerocrossing moments is one of the methods used to predict the phasecurrent commutation instances. Most of the techniques based on back-EMF zero-crossing detection have the inherit disadvantage of an indirect prediction of commutation instances. This is the result of the commutation instance occurring 30??? electrical position after the zero-crossing of the induced back-EMF in the unexcited phase. Often, the time difference between the zero crossing of the back-EMF and the current commutation instance is assumed constant. This assumption can be valid for steadystate operation, however a different time span should be taken into account during transient operation of the BLDC machine. To overcome this problem an enhancement is proposed here which improves the performance while keeping the simplicity of the back-EMF zero-crossing detection method.},
  author       = {Darba, Araz and De Belie, Frederik and Melkebeek, Jan},
  issn         = {0278-0046},
  journal      = {IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS},
  keywords     = {VOLTAGE DIFFERENCE,POSITION SENSORLESS DRIVE,BRUSHLESS DC MOTOR,SYSTEM,RANGE,Brushless machines,field-programmable gate arrays (FPGAs),permanent-magnet machines,self-sensing control,NEUTRAL VOLTAGE},
  language     = {eng},
  number       = {10},
  pages        = {6064--6075},
  publisher    = {IEEE},
  title        = {A back-EMF threshold self-sensing method to detect the commutation instants in BLDC drives},
  url          = {http://dx.doi.org/10.1109/TIE.2015.2423651},
  volume       = {62},
  year         = {2015},
}

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