Permanent Magnet Synchronous Motor Model Extension for High-Frequency Signal Injection-Based Sensorless Magnet Polarity Detection

Szalay, István; Fodor, D.; Enisz, Krisztián; Medve, Hunor

doi:10.3390/en15031131

Cited by 8 publications

(3 citation statements)

References 41 publications

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“…We can put the influence of these forwarding students on the message to measure the diffusion ability of the message. Information diffusion capability can be used to measure the degree of "fire" of the information [20][21]. The symbolic representation of IDP and its calculation formula are as follows:…”

Section: Information Expansion Capabilitymentioning

confidence: 99%

Analysis of Teachers’ Discourse in the Digital Platform Mode of College English Teaching Based on the Information Diffusion Model

Hong

2023

Applied Mathematics and Nonlinear Sciences

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This paper utilizes the information diffusion mechanism of the information extension model, which can act on the influence of students in the process of university English teaching to the information extension model to the diffusion ability that English information has. It examines the level of student activity and English information coverage in university English teaching and discusses the use of the information extension model in English teaching. According to the objectives of university English teaching, the functional requirements of the university English teaching platform are analyzed, the university English teaching platform based on the information diffusion model is designed through big data technology, and the English teaching platform combined with the information extension model is analyzed in an example study. The results show that on the model simulation analysis, the performance of this paper’s model is better than the User Rank model and UI-LR model when mining less than 30 information extensions. In the analysis of teachers’ discourse, the speech rate of teachers in the university English teaching platform is mainly concentrated in the range of 140-149 syllables/minute and 150-159 syllables/minute, and only one teacher’s speech rate exceeds 170-179 syllables/minute. This study has the potential to enhance students’ understanding of teachers’ discourse and establish a solid platform for communication between teachers and learners.

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Section: Information Expansion Capabilitymentioning

confidence: 99%

Analysis of Teachers’ Discourse in the Digital Platform Mode of College English Teaching Based on the Information Diffusion Model

Hong

2023

Applied Mathematics and Nonlinear Sciences

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“…Sensorless control technology has been widely used to improve the reliability of permanent magnet synchronous motors in flywheel energy storage systems. Currently, the sensorless technology of permanent magnet synchronous motors is mainly divided into two categories: fundamental back electromotive force(EMF) observation and highfrequency signal injection [12][13][14][15][16][17]. The high-frequency signal injection method can be used to observe the motor speed at zero or low rates, but the observed effect could be better at medium and high speeds.…”

Section: Introductionmentioning

confidence: 99%

Application of a new type of super twist sliding mode control in flywheel energy storage

Liu

Wang

ZHOU

et al. 2023

IEICE Electron. Express

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Aiming at the error problem in estimating the speed of a permanent magnet synchronous motor(PMSM) using a sliding mode observer in a flywheel energy storage system, a super twist sliding mode observer(SMO) is used to replace the traditional sliding mode observer. A new saturation function is designed to replace the sign function. In addition, a constant sliding mode gain may lead to a decrease in observation accuracy during speed switching. An adaptive sliding mode gain is proposed to reduce chattering, The accurate estimation of the comprehensive speed range observer is enhanced, and the stability of the proposed observer is proved. On this basis, a super twist sliding mode speed controller is designed to replace the traditional PI controller to improve the observation performance of the system. The flywheel energy storage system's simulation model is built, and the flywheel energy storage system's constant speed standby and charging conditions are simulated. The simulation results verify the correctness and effectiveness of the improved super twist sliding mode observer in the flywheel motor.

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“…In [14], the combination of a self-adaptation controller and a Fal function filter effectively avoids the problem of amplification of unwanted noise signals, but the process of determining the parameters in the Fal function is complicated. In addition to the suppression of harmonic currents through controllers, harmonic injection control methods have better harmonic suppression capabilities and are widely used in permanent magnet synchronous motors [15][16][17][18]. Harmonic injection algorithms rely on filtering and extracting harmonic currents, so effectively extracting harmonic signals is crucial for the control effect.…”

Section: Introductionmentioning

confidence: 99%

Harmonic Injection Control of Permanent Magnet Synchronous Motor Based on Fading Memory Kalman Filtering

Du,

Sun,

Wang

et al. 2023

Electronics

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In order to reduce the harm of harmonic disturbances of the permanent magnet synchronous motor (PMSM) control system to the drive and improve the accuracy of the control system, a harmonic injection control method based on asymptotic fading memory Kalman filtering is proposed. Compared with the traditional harmonic injection method, this method reduces the torque pulsation of the PMSM, converges faster, and realizes fast stabilization of the control system. In order to improve the control accuracy of the system, extended Kalman filtering is used to estimate the mechanical angular velocity and optimize the harmonic extraction process to reduce the interference of noise signals in the extraction process. At the same time, a fading memory factor is introduced to replace the fixed gain in the Kalman filter, which can correct the system error and effectively prevent the filtering dispersion, thus enhancing the system’s stability. Finally, the system is simulated and experimentally analyzed, and the results show that the method can improve the dynamic response speed, stability, and control accuracy of the system compared with the traditional harmonic injection method.

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Permanent Magnet Synchronous Motor Model Extension for High-Frequency Signal Injection-Based Sensorless Magnet Polarity Detection

Cited by 8 publications

References 41 publications

Analysis of Teachers’ Discourse in the Digital Platform Mode of College English Teaching Based on the Information Diffusion Model

Analysis of Teachers’ Discourse in the Digital Platform Mode of College English Teaching Based on the Information Diffusion Model

Application of a new type of super twist sliding mode control in flywheel energy storage

Harmonic Injection Control of Permanent Magnet Synchronous Motor Based on Fading Memory Kalman Filtering

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