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A CONCEPTION FOR A SENSORLESS SPEED CONTROL OF THE SQUIRREL CAGE INDUCTION MOTOR
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| Author(s) |
M. Beck; D. Naunin |
| Abstract |
For the sensorless speed control of a squirrel cage induction motor a new method for the slip-frequency calculation will be presented. A relation is derived that permits to calculate the electrical rotor frequency directly from the phase angle between the stator voltage and current. The practical realization needs a stator voltage which provides harmonic elimination with a predetermined zero crossing of the fundamental, and a filtering procedure for the zero detection of the stator current. The essential characteristics of the utilized PWM method as well as the filter algorithm are demonstrated and the application of the slip-frequency calculation in a control scheme is discussed. |
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| Filename: | Unnamed file |
| Filesize: | 3.121 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-11 by System |
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