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SPEED SENSORLESS DRIVE WITH INDUCTION MACHINE BASED ON NATURAL FIELD ORIENTATION
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| Author(s) |
J. Zdenkovic; Z. Kuljic; N. Pasalic |
| Abstract |
The speed sensorless drive in indirect vector control scheme with acting on stator voltage vector is realized by excluding the speed sensor and including the current measurement. The decoupling circuit and the speed estimator are based on Natural Field Orientation presumptions: the rotor flux vector modulus is held constant and the total leakage factor is zero. The sensorless drive is tested on laboratory set up where another induction machine operating in torque control mode is used for loading. Steady state characteristics are presented together with system responses to speed reference reversing under no load condition and system responses during stepwise loading processes. Influence of the machine stator and rotor resistance thermal changes, and changes in the main machine inductance during machine operation on the behaviour of the proposed control structure is discussed. Simplicity of the proposed control algorithms allows implementation in low cost microcontroller hardware. |
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| Filename: | Unnamed file |
| Filesize: | 369.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-05-16 by System |
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