Full
Outline
In the medium- and high-speed operation ranges, the sliding mode observer (SMO) usually obtains the rotational speed and rotor position of a permanent magnet synchronous motor (PMSM) based on a formula method or phase-locked loop. However, the phase delay caused by a low-pass filter, the parameter variation in the phase-locked loop itself and the sliding mode chattering remain the key issues that need to be addressed. Under this background, a position sensorless control method for PMSM based on an improved SMO is proposed. First, a variable sliding mode gain related to the rotational speed is designed, which can achieve adaptive adjustment of the sliding mode gain parameter when the rotational speed changes, thereby reducing the system chattering and improving the system stability and dynamic performance. Second, based on the mechanical motion equation, a method for estimating the rotational speed and rotor position is put forward, which not only simplifies the estimation process but also effectively reduces the influence of changes in rotational speed on the estimation accuracy and enhances the system’s anti-interference capability. Finally, the feasibility and effectiveness of the proposed method were verified based on bench experiments.
51
4
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
