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COMPARISON OF TRUE RUNNING AT DIFFERENT CONCEPTS OF CONTROLLING BRUSHLESS DC-MOTORS
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| Author(s) |
J. Kempkes; Ph. K. Sattler |
| Abstract |
A comparison of true running between serve-drives has been performed until now only by examination of the torque ripple. As the torque ripple can only be minimized - several possibilities are shown briefly in the presented paper - the influence of the current control method and of the speed controlling concept can not be neglected because of the controllers capabilities to reduce the always existing torque ripple of a brushless dc-motor. In order to investigate these capabilities a new method of measurement and suitable criterias are to be introduced. The measurement system presented in this paper allows to examine the variation of speed and acceleration very precisely after an off-line evaluation of the measurement data-set, whereas the presented criterias are used for the real comparison of the servo-drives concerning their true running. The control concepts compared in this paper are: PI-speed-controller combined with rectangular and sinusoidal current waveforms, current waveforms with additional harmonics in order to compensate known (i.e. measured) torque ripple and a state controller with a load torque observer. |
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| Filename: | Unnamed file |
| Filesize: | 4.009 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-05-03 by System |
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