Initial position detection scheme based on discrete pulse signal injection for PMSM
The determination of the initial position plays a crucial role in the sensorless control of motors, significantly affecting the operational performance. Unlike the conventional schemes involving two separate steps, the proposed scheme constructs a closed-loop control system with response current fee...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2025-06-01
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| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/16878132251348547 |
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| Summary: | The determination of the initial position plays a crucial role in the sensorless control of motors, significantly affecting the operational performance. Unlike the conventional schemes involving two separate steps, the proposed scheme constructs a closed-loop control system with response current feedback and integrates polarity identification with rotor position tracking through unipolar pulse sequence signal injection to estimate the rotor position. The entire scheme adopts a discrete approach, ensuring a holistic and less complex algorithm. Moreover, a novel iteration method based on interpolation is introduced, leveraging the reconstructed cost function to achieve rapid convergence and minimize the number of injected pulses. This process overcomes the limitation of obtaining accuracy in the conventional pulse signal injection method is related to the number of injected pulse signals and gives the control system extra flexibility. The superiority and feasibility of the proposed scheme are verified on an experimental platform driven by a surface-mounted permanent magnet synchronous motor (SPMSM). |
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| ISSN: | 1687-8140 |