NDLI: Direct torque control strategy of five-phase PMSM with load capacity enhancement

Content Provider	IET Digital Library
Author	Zhou, Yangzhong Yan, Zhen Duan, Qingtao Wang, Lingbo Wu, Xin
Abstract	A direct torque control (DTC) strategy of five-phase permanent magnet synchronous motor (PMSM) is proposed in this study. The proposed DTC scheme uses five-phase inverter to output basic voltage vector or discrete synthesised voltage vectors in one control period to realise the direct control of torque and flux on the fundamental and third harmonic planes simultaneously, and then realise the third harmonic current injection to enhance the load capacity. In order to realise the third harmonic current injection with maximum torque outputting and minimum peak of stator current, the maximum torque per ampere (MTPA) scheme is proposed in which the minimum copper loss and the same phase relation between fundamental and third harmonic currents are taken as the constraint conditions, and the amplitude of the fundamental and third harmonic fluxes and the optimal torque distribution ratio are derived in MTPA. A TMS320F2812-based digital controller is adopted as a core to construct the DTC experimental platform of the five-phase PMSM with 800 W rated power. The results of experiment and simulation show that the proposed DTC strategy can improve the maximum load torque of the motor, reduce the flux density of the stator and improve the core utilisation rate of the stator.
Starting Page	598
Ending Page	606
Page Count	9
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 3, Mar (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5203
Journal	IET Power Electronics
Publisher Date	2018-11-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control Engineering Computing Control of Electric Power System Digital Control Direct Torque Control Strategy Discrete Synthesised Voltage Vector DTC Experimental Platform DTC Scheme Five-phase Inverter Five-phase Permanent Magnet Synchronous Motor Harmonic Current Injection Invertors Machine Control Maximum Load Torque Maximum Torque Per Ampere Scheme Mechanical Variables Control Minimum Copper Loss MTPA Optimal Torque Distribution Ratio Output Basic Voltage Vector Permanent Magnet Motors Phase Relation PMSM Stator Current Stators Synchronous Machine Synchronous Motors Third Harmonic Current Third Harmonic Fluxes Third Harmonic Plane TMS320F2812-based Digital Controller Torque Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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