Comprehensive Modulation Strategies for Synchronous Reluctance Motor Drives Used in Weak Grids

Shuo Wang, Dmytro Prystupa, Yuli Bao (), Vasyl Varvolik, Giampaolo Buticchi, He Zhang and Michele Degano
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Shuo Wang: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, The University of Nottingham, Ningbo China, 199 Taikang East Road, Ningbo 315100, China
Dmytro Prystupa: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, The University of Nottingham, Ningbo China, 199 Taikang East Road, Ningbo 315100, China
Yuli Bao: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, The University of Nottingham, Ningbo China, 199 Taikang East Road, Ningbo 315100, China
Vasyl Varvolik: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, The University of Nottingham, Ningbo China, 199 Taikang East Road, Ningbo 315100, China
Giampaolo Buticchi: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, The University of Nottingham, Ningbo China, 199 Taikang East Road, Ningbo 315100, China
He Zhang: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, The University of Nottingham, Ningbo China, 199 Taikang East Road, Ningbo 315100, China
Michele Degano: PEMC Group, University of Nottingham, Nottingham NG7 2RD, UK

Energies, 2024, vol. 17, issue 3, 1-20

Abstract: Synchronous reluctance machines are considered a cost-effective solution for several industrial applications and present potential efficiency benefits compared to induction motors. In industrial applications, power supply oscillations can lead to short-term disturbances that can affect the drive operation; therefore, the control must be robust to guarantee high efficiency and service continuity. The focus of this study was to identify the speed boundaries considering different values of applied DC-link voltage, taking into account the highly nonlinear magnetic behavior of the machine and its cross-coupling characteristics. In addition, a comprehensive carrier-based implementation of a pulse width modulation strategy was proposed to achieve optimal efficiency in both the machine and converter, which is essential in the presence of “weak” grids. The proposed technique was demonstrated to meet the desired reference torque and rated speed, even during DC-link voltage drops (up to 7.4% of the rated voltage). The proposed methodology was experimentally validated on a 90 kW SynRM drive with a broader modulation range and higher efficiency. This work considered several different supply voltage levels to assess the stability and continuity of torque output and further proved the proposed method.

Keywords: synchronous reluctance machine; overmodulation; bus clamping discontinuous PWM; optimal modulation selection; DC-link voltage utilization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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