NDLI: Current-loop bandwidth expansion strategy for permanent magnet synchronous motor drives

Content Provider	IEEE Xplore Digital Library
Author	Hongjia Wang Ming Yang Li Niu Dianguo Xu
Copyright Year	2010
Description	Author affiliation: Institute of Power Electronics & Electrical Drive, Harbin Institute of Technology, China (Hongjia Wang; Ming Yang; Li Niu; Dianguo Xu)
Abstract	The dynamic response of the permanent magnet AC servo system is restricted by the bandwidth of current loop, which is the innermost loop. In digital control AC servo system, there are two major limiting factors for current-loop bandwidth, switching frequency and digital delay which means sum of A/D sampling time, algorithm execution time and PWM duty cycle update delay. The bandwidth expansion of current-loop without changing the switching frequency of power devices is necessary, as the increasing of switching frequency will raise the losses. Based on the synchronous rotating frame current decoupled control, the delay effects of current sampling and PWM duty cycle update in the permanent magnet synchronous motor drive systems were analyzed. The bandwidth expansion strategy was proposed, to achieve the stator current double sampling and PWM duty cycle double update in a carrier period. The current-loop bandwidth can be extended more than one times theoretically while the switching frequency remaining unchanged, so that the dynamic performance of permanent magnet synchronous motor drive systems was improved. Simulation and experimental results verified the theoretical analysis and effectiveness of the method.
Starting Page	1340
Ending Page	1345
File Size	621545
Page Count	6
File Format	PDF
ISBN	9781424450459
e-ISBN	9781424450466
DOI	10.1109/ICIEA.2010.5514913
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-15
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth Permanent magnet motors Pulse width modulation Switching frequency Delay effects Sampling methods Servomechanisms Magnetic analysis Permanent magnets Digital control PWM duty cycle update permanent magnet synchronous motor (PMSM) current-loop bandwidth current sampling
Content Type	Text
Resource Type	Article

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