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Content Provider | IEEE Xplore Digital Library |
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Author | Chunlong Li Songhua Shen Jianrong Zhang Miao Guan Jialin Lu |
Copyright Year | 2006 |
Description | Author affiliation: Sch. of Autom. Sci. & Electr. Eng., Beihang Univ., Beijing, China (Chunlong Li; Songhua Shen) |
Abstract | Inherent disadvantage of digital control is control time delay induced by the zero-order-hold effect and the computational time delay. It could induce system oscillation and even system stability could be destroyed. Predictive results of conventional current state observer were not ideal because that it was open loop in essence. To alleviate this problem, a method based on new state observer was proposed. The current state in a control period was described at first. The new output variable was acquired by sampling in the intermediate instant of control period and the observer error was corrected by it. The proposed method eliminates the time delay impact so that not only stability is increased but also deadbeat control is fully realized in current loop. A lab 1kW electronic load prototype with power regeneration ability was set up for the proof of concept. The prototype system was operated at 25 kHz switching frequency and was controlled by TMS320F2812 DSP. Experimental results verify the validity of the proposed scheme. |
Sponsorship | IEEE Control Syst. Soc. SICE, ICASE, Harbin Inst. of Technol |
Starting Page | 1991 |
Ending Page | 1995 |
File Size | 4864634 |
Page Count | 5 |
File Format | |
ISBN | 7810778021 |
DOI | 10.1109/CHICC.2006.280901 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2006-08-07 |
Publisher Place | China |
Access Restriction | Subscribed |
Rights Holder | TECH COMMITTEE ON CONTROL THEORY |
Subject Keyword | Deadbeat Stability State observer Delay effects Pulse width modulation Open loop systems Digital control PWM rectifier AC electronic load Rectifiers Prototypes Sampling methods Electric variables control Error correction |
Content Type | Text |
Resource Type | Article |
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