An effective decoupling control with simple structure for induction motor drive system considering digital delay

Wang，Cheng1; Jaidaa，Asem1; Wang，Ze2; Lu，Lei3

2021-12-01

10.3390/electronics10233048

Electronics (Switzerland)   影响因子和分区

2079-9292

Digital processing poses a considerable time delay on controllers of induction motor (IM) driving system, which degrades the effects of torque/flux decoupling, slows the motor torque response down, or even makes the entire system unstable, especially when operating at a low switching frequency. The existing methods, such as feed-forward and feed-back decoupling methods based on the proportional integral controller (PI), have an intrinsic disadvantage in the compromise between high performance and low switching frequency. Besides, the digital delay cannot be well compensated, which may affect the system loop and bring instability. Conventional complex vector decoupling control based on an accurate IM model employs complicated decoupling loops that may be degraded by digital delay leading to discrete error. This article aims to give an alternative complex vector decoupling solution with a simple structure, intended for optimized decoupling and improving the system dynamic performance throughout the entire operating range. The digital delay-caused impacts, including secondary coupling effect and voltage vector amplitude/phase inaccuracy, are specified. Given this, the digital delay impact is canceled accurately in advance, simplifying the entire decoupling process greatly while achieving uncompromised decoupling performance. The simulation and experimental results prove the effectiveness and feasibility of the proposed decoupling technique.

Complex vector Decoupling control Delay compensation Induction motor Low switching frequency

SCI

英语

通讯

Natural Science Foundation of Jiangsu Province[BK20190461]

Computer Science ; Engineering ; Physics

Computer Science, Information Systems ; Engineering, Electrical & Electronic ; Physics, Applied

WOS:000734540000001

MDPI

2-s2.0-85120637150

Scopus

1.Department of Electrical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.NR Electric Co.,Ltd.,Nanjing,211102,China

Wang，Cheng,Jaidaa，Asem,Wang，Ze,et al. An effective decoupling control with simple structure for induction motor drive system considering digital delay[J]. Electronics (Switzerland),2021,10(23).

Wang，Cheng,Jaidaa，Asem,Wang，Ze,&Lu，Lei.(2021).An effective decoupling control with simple structure for induction motor drive system considering digital delay.Electronics (Switzerland),10(23).

Wang，Cheng,et al."An effective decoupling control with simple structure for induction motor drive system considering digital delay".Electronics (Switzerland) 10.23(2021).