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1. 发明申请

WO2013017346A1 A METHOD AND A SYSTEM FOR CONTROLLING A MODULATING VALVE UNIT INCLUDING AN ELECTROMAGNET 审中-公开
标题翻译：一种用于控制包括电磁网的调制阀单元的方法和系统
公开(公告)号：WO2013017346A1
公开(公告)日：2013-02-07
申请号：PCT/EP2012/062603
申请日：2012-06-28
申请人： SIT LA PRECISA S.p.A. con socio unico , CROIN, Marco , GIACOMELLI, Massimo , ABATE, Maurizio Achille
发明人： CROIN, Marco , GIACOMELLI, Massimo , ABATE, Maurizio Achille
IPC分类号： F23N1/00 , H01F7/18
CPC分类号： F23N1/002 , F23N2023/04 , F23N2023/08 , F23N2023/22 , F23N2035/14 , F23N2035/16 , F23N2035/20 , H01F7/18 , H01F2007/1888
摘要： Valve unit (1) for controlling the feed of a combustible gas to a burner apparatus, comprising: a device (6) for regulating the pressure of the gas at the outlet of the unit, including a valve seat (7) associated with a plug (8), and an operating means (14) for causing the plug to move relatively to the corresponding valve seat, to regulate the outlet feed pressure (Pu) by modulation, the operating means comprising at least one electromagnet of the proportional type; a control circuit of the pressure regulating device including a PWM signal generator generating a PWM voltage signal adapted to generate a current signal in the electromagnet in order to move the plug as a function of the magnitude of the current signal and thus determine the outlet pressure, the magnitude of the current being a function of the duty cycle of the PWM signal; the PWM signal having a frequency such that the operating means is subjected to a mechanical dither having a specified amplitude at least for a specified time interval; the PWM signal generator including means of controlling the duty cycle and means of controlling the frequency of the PWM signal, the duty cycle control means varying the duty cycle of the PWM signal with the variation of the desired outlet pressure, and the frequency control means being adapted to vary the frequency of the PWM signal as a function of the variation of the duty cycle so as to keep the amplitude of the dither substantially constant, independently from the variations of the duty cycle of the PWM signal.
摘要翻译：用于控制可燃气体进入燃烧器装置的阀单元（1），包括：用于调节所述单元出口处的气体压力的装置（6），包括与塞子相关联的阀座（7）（8），以及用于使塞子相对于相应的阀座移动以通过调制来调节出口进给压力（Pu）的操作装置（14），所述操作装置包括至少一个比例型电磁体; 压力调节装置的控制电路包括PWM信号发生器，其生成适于在电磁体中产生电流信号的PWM电压信号，以便根据电流信号的大小来移动插头，从而确定出口压力，电流的大小是PWM信号占空比的函数; 所述PWM信号的频率使得所述操作装置经历至少具有指定时间间隔的具有指定振幅的机械抖动; 所述PWM信号发生器包括控制所述占空比的装置和控制所述PWM信号的频率的装置，所述占空比控制装置根据所需出口压力的变化来改变所述PWM信号的占空比，并且所述频率控制装置为适于根据占空比的变化改变PWM信号的频率，以便与PWM信号的占空比的变化无关地保持抖动幅度基本恒定。

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