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THE ANALYTICAL DETERMINATION OF THE CHARACTERISTICS OF PERMANENT MAGNET BRUSHLESS DC DRIVES
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| Author(s) |
R. Carlson; J. Cros; M. Lajoie-Mazenc |
| Abstract |
An analytical formulation to calculate the average torque versus speed characteristics of brushless DC drives is presented. The form of this characteristics is shown to be a consequence of the torque perturbation caused by the phases commutation by the inverter. The analytical formulation is based on the analysis of the behavior of the system in three well identified regions of operation: one at low speeds where the phase emf is lower than four times the voltage at the inverter dc terminal, the second one occurs at an intermediate speed region where the phase emf is greater than four times the voltage at the dc inverter terminals and the third one has the same condition on the emf and dc voltage as the second region but the inverter current is not controlled any more. The analytical formulation considers both the current control by an hysteresis band and the current control by PWM. Simulation results are used to validate the proposed analytical model. |
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| Filename: | Unnamed file |
| Filesize: | 1.772 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-16 by System |
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