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Open AccessArticle

Analysis of Model Predictive Current-Controlled Permanent Magnet Synchronous Motor Drives with Inaccurate DC Bus Voltage Measurement

School of Electrical Engineering, Southeast University, Nanjing 210096, China
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Energies 2020, 13(2), 353; https://doi.org/10.3390/en13020353
Received: 3 December 2019 / Revised: 7 January 2020 / Accepted: 7 January 2020 / Published: 10 January 2020
(This article belongs to the Section Electrical Power and Energy System)
In this paper, the effects of inaccurate DC bus voltage measurement are analyzed to model predictive current-controlled permanent magnet synchronous motor (PMSM) drives. It is found that the selection of the optimal space vector is affected by inaccurate DC bus voltage measurements, and the shortest distance principle is proposed to evaluate the effects. With the under-voltage measurement, the actual q axis current is always larger than the reference value, and PMSM may be damaged by the over-current phenomenon. However, the actual q axis current is always smaller than the reference value with the over-voltage measurement, and the rated torque capacity cannot be properly used. The effects of the over-voltage measurement are more serious than those of the under-voltage measurement. Additionally, the larger DC bus voltage measurement error can result in more serious effects than with the over-voltage measurement. Considering the limited variation range of the actual DC bus voltage, the rated value can be set as the measured value and the effects can be neglected. However, the effects should be taken into account if the variation range of the actual DC bus voltage is large. All the theoretical analyses are verified by experimental results. View Full-Text
Keywords: model predictive current control (MPCC); permanent-magnet synchronous motor (PMSM); DC bus voltage; shortest distance principle model predictive current control (MPCC); permanent-magnet synchronous motor (PMSM); DC bus voltage; shortest distance principle
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Wang, W.; Lu, Z. Analysis of Model Predictive Current-Controlled Permanent Magnet Synchronous Motor Drives with Inaccurate DC Bus Voltage Measurement. Energies 2020, 13, 353.

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