PM ENHANCED SENSING OF INTERNAL EMF VARIATION- A TOOL TO STUDY PMBLDC/AC MOTORS

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering, Engineering, Electrical & Electronic

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VOLUME 6 , ISSUE 4 (September 2013) > List of articles

PM ENHANCED SENSING OF INTERNAL EMF VARIATION- A TOOL TO STUDY PMBLDC/AC MOTORS

R K Srivastava * / S K Singh * / Ankita Dwivedi * / Srikanth Gollapudi *

Keywords : Permanent Magnet Brush Less (PMBL) Motors, Power Operational Amplifier (P-OPAMP), PM Enhanced Sensing, Magnetic switch, FEM analysis, Hall Effect sensor & latch.

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 6, Issue 4, Pages 1,456-1,478, DOI: https://doi.org/10.21307/ijssis-2017-599

License : (CC BY-NC-ND 4.0)

Received Date : 01-May-2013 / Accepted: 01-July-2013 / Published Online: 01-September-2013

ARTICLE

ABSTRACT

The search for replacement of commutator and brushes in conventional DC motors by electronic commutator has resulted in a class of Permanent Magnet Brush Less (PMBL) motors. The operation of PMBL motor requires synchronization of coil currents with the instantaneous rotor position. The applied voltages of higher magnitudes must have same zero crossings as that of speed induced back EMF of the respective stator windings. The complexity of rotor position detection in PMBL motor is overcome by obtaining a replica of stator induced EMF using additional auxiliary stator and rotor. The auxiliary stator winding induced EMF is amplified using Power Operational Amplifier (P-OPAMP) and the output is connected to the main stator winding. The proposed scheme has been tested at laboratory scale and has been found to be a promising alternative scheme for operation of PMBLDC/AC motors.

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REFERENCES

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