In-Depth Study of the Torque Constant for Permanent-Magnet Machines

Author

Lin, D. ; Zhou, P. ; Cendes, Z.J.

Volume

45

Issue

12

fYear

2009

Firstpage

5383

Lastpage

5387

Abstract

The torque constant, together with the back-EMF constant, was originally used in permanent-magnet DC commutator (PMDC) motors to couple electric circuit equations with mechanical equations. It is still an open question how these two constants should be defined in brushless DC (BLDC) motors and permanent-magnet (PM) AC motors. We present an in-depth study of these two constants, and conclude that the definition based on the dq axes is applicable for the dynamic motion control of not only PM AC motors, but also BLDC motors.

Keywords

brushless DC motors; commutator motors; machine control; motion control; permanent magnet motors; torque; BLDC motors; back-EMF constant; brushless DC motor; dynamic motion control; electric circuit equation; mechanical equation; permanent-magnet AC motor; permanent-magnet DC commutator motor; torque constant; AC motors; Brushless DC motors; Brushless motors; Commutation; Coupling circuits; DC motors; Equations; Synchronous motors; Torque; Voltage; Back-EMF constant; brushless dc motors; dc commutator motors; finite-element analysis; permanent magnets; synchronous motors; torque constant;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2026043

Filename

5326445