| Autor: |
CHEN Zhibo, GAO Jian, MEI Wenqing, SHANG Jing, HUANG Shoudao |
| Jazyk: |
čínština |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Kongzhi Yu Xinxi Jishu, Iss 1, Pp 19-25 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2096-5427 |
| DOI: |
10.13889/j.issn.2096-5427.2022.01.300 |
| Popis: |
Permanent magnet motors restart at high speeds is an essential and important function in applications in many key fields. Due to the unknown initial position of rotor and the observation error in this condition, improper control may cause current inrush or overcurrent fault. This paper focuses on the engineering practice and proposes a three-stage control mode based method for high speed restart of permanent magnet motors without position sensors. Zero-voltage vector control method with closed-loop current amplitude is used for initial input to control the motor current in closed loop and limit the sudden change of the current; subsequently, through a reasonable switching strategy, the control strategy is naturally transitioned to d-q axis current closed loop based vector control, and virtual resistance method is adopted to improve the accuracy of rotor position observation, which smoothly brings the motor into normal control mode. It presents a numerical simulation of the whole process of the built-in permanent magnet synchronous motor with high speed restart, during the whole process of restarting. There is no inrush of motor current and no sudden change of speed and position angle estimation, the observation method of rotor position angle, control strategy and modulation strategy all realize smooth switching, and the motor is pulled to the normal operating condition stably. Simulation results verify the feasibility and effectiveness of the proposed method. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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