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Fuzzy Logic Speed Controller with Reduced Rule Base for Dual PMSM Drives

Authors: Fizatul Aini Patakor, Jurifa Mat Lazi, Zulkifilie Ibrahim, Marizan Sulaiman, Siti Noormiza Mat Isa


Dual motor drives fed by single inverter is purposely designed to reduced size and cost with respect to single motor drives fed by single inverter. Previous researches on dual motor drives only focus on the modulation and the averaging techniques. Only a few of them, study the performance of the drives based on different speed controller other than Proportional and Integrator (PI) controller. This paper presents a detailed comparative study on fuzzy rule-base in Fuzzy Logic speed Controller (FLC) for Dual Permanent Magnet Synchronous Motor (PMSM) drives. Two fuzzy speed controllers which are standard and simplified fuzzy speed controllers are designed and the results are compared and evaluated. The standard fuzzy controller consists of 49 rules while the proposed controller consists of 9 rules determined by selecting the most dominant rules only. Both designs are compared for wide range of speed and the robustness of both controllers over load disturbance changes is tested to demonstrate the effectiveness of the simplified/reduced rulebase.

Keywords: PMSM, Dual Motor Drives, Fuzzy Logic Speed Controller, Reduced Rule-Base

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