Affiliations: Institute of Technology, Xi’an International University, Xi’an, Shaanxi 710077, China | E-mail: yanhongld@163.com
Correspondence:
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Corresponding author: Institute of Technology, Xi’an International University, Xi’an, Shaanxi 710077, China. E-mail: yanhongld@163.com.
Abstract: In order to reduce the influence of noise on the stability of cyclic signal transmission and improve the effect of signal control, a method to control the stability of cyclic signal transmission of high-power driving circuit is proposed. The main components of the driving circuit and the characteristics of its cyclic signal are analyzed. According to the analysis results, a cyclic signal transmission interference detection module is designed, and the source interference detection is realized by using this module; Considering the electromagnetic influence of the circulating signal and the power part, the optocoupler isolation method is used to isolate the circulating signal; On the basis of detecting and isolating the transmission interference of circulating signal, the primary pulse width modulation signal and the secondary fault feedback signal are modulated by a single pulse transformer to realize the bidirectional transmission design of circulating signal; The internal optimization design of the high-power drive circuit is carried out, the error correction of the signal transmission stability control is carried out by using the linearized small interference error compensation method, and the empirical mode decomposition method is applied to the cyclic signal analysis of the high-power drive circuit to solve the cross term interference problem in the cyclic signal analysis. Finally, the stability control of cyclic signal transmission is realized by using double quasi PR controller. The experimental results show that the signal transmission time of this method is short, the minimum value is less than 0.5 s, the signal transmission deviation is only 0.22, the transmission rate is high, the signal transmission deviation is small, and the signal waveform is stable, which fully shows that its control effect is good.
Keywords: Monopulse transformer, optocoupler isolation method, pulse width modulated signal, secondary fault feedback signal, high power drive circuit, interference detection
