Sensorless Position and Speed Control of Induction Motors Using High-Frequency Injection and Without Offline Precommissioning |
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Authors: | Qiang Gao Asher G Sumner M |
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Affiliation: | Univ. of Nottingham, Nottingham; |
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Abstract: | This paper addresses the sensorless speed and position control of induction motors using high-frequency injection at zero and low frequencies. A novel algorithm is presented which allows the rejection of saturation and nonlinear inverter effects without the need for an offline precommissioning process. The method is based on a set of synchronous filters to identify the disturbance waveforms and a memory algorithm that refines the quality of the disturbance waveforms as the motor's operational history is increased. The algorithm is entirely sensorless. Experimental results show sensorless low-frequency operation with and without the memory algorithm. |
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