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本文根据IEC国际规范和我国部颁标准所给速动时间常数T_x的定义,用终值定理导出了数学表达式,并指出当b_p不为零时,T_x没有意义。文中还第一次导出了PID型调速器T_x的数学表达式。
According to the definition of the instantaneous time constant T_x given by the IEC international norms and China’s ministerial standards, this paper derives the mathematical expression by the final value theorem and points out that T_x has no meaning when b_p is not zero. The article also derives the mathematical expression of PID governor T_x for the first time.