Robust Direct Torque Control of Synchronous Reluctance Motor Drives in the Field-Weakening Region

Gilbert Hock Beng Foo, Xinan Zhang

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

A robust field-weakening method for direct-torque-controlled (DTC) synchronous reluctance motors is presented in this paper. The proposed algorithm achieves smooth transition between the constant torque and field-weakening regions. Maximum torque per ampere is utilized below base speed, while both the current and voltage limits of the drive system are satisfied in the field-weakening region. The proposed method is robust to the variations in the machine dq -axis inductances. This ensures the system stability during field-weakening operation, especially along the maximum torque per flux trajectory. The proposed algorithm is incorporated into the duty ratio regulation-based DTC to achieve high-performance torque and flux control in the field-weakening region. Experimental results included in this paper confirm the veracity of the proposed method.

Original languageEnglish
Article number7434062
Pages (from-to)1289-1298
Number of pages10
JournalIEEE Transactions on Power Electronics
Volume32
Issue number2
DOIs
Publication statusPublished - 1 Feb 2017
Externally publishedYes

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