A Position Sensorless Hybrid Control Strategy for Permanent Magnet Synchronous Motor
In order to adapt to the constantly changing load conditions of permanent magnet synchronous motor used in electric hydraulic power steering system in full speed range, a position sensorless hybrid control strategy of permanent magnet synchronous motor based on extended back EMF is proposed. A contr...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Control and Information Technology
2021-01-01
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| Series: | Kongzhi Yu Xinxi Jishu |
| Subjects: | |
| Online Access: | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2021.04.004 |
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| Summary: | In order to adapt to the constantly changing load conditions of permanent magnet synchronous motor used in electric hydraulic power steering system in full speed range, a position sensorless hybrid control strategy of permanent magnet synchronous motor based on extended back EMF is proposed. A control strategy of speed open loop and current closed loop is adopted at low speed; in the transition phase from open-loop speed to closed-loop speed switching, a universal torque angle closed-loop control strategy is used to achieve smooth transition for speed and torque; in the speed closed-loop phase, a position sensorless control strategy based on the extended back-EMF model is adopted. Finally, the control strategy proposed in this paper is verified by experiments. When the electro-hydraulic power steering system starts in the no-load and full load conditions, current and speed can achieve fast tracking response. In the process of control strategy switching, current and speed can achieve a smooth transition, and finally it runs stably in the double-closed-loop control mode, which proves the effectiveness of the control strategy. |
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| ISSN: | 2096-5427 |