利用减温水控制过热器和再热器出口温度以防止超过材料温限。实践证明，对超临界直流锅炉采用投粉稳压冲管过热器、再热器冲管系数可达1.0和1.6以上，效果良好。
The practical experience shows that in the light of steam purging for supercritical once-through boiler, the superheater and reheater disturbance coefficients can reach 1.0 and 1.6 respectively.
本文首先阐述了线性调宽式开关稳压器的组成原理；其次，计算了基准电压及占空系数，推演出电压调整率、输出内阻、效率等三项性能指标的数学公式；
The structural principle of the linear width type voltage regulator is presented and the expressions for selecting and computing the reference voltage and the duty factor are given.
本文首先阐述了线性调宽式开关稳压器的组成原理；其次，计算了基准电压及占空系数，推演出电压调整率、输出内阻、效率等三项性能指标的数学公式；
The structural principle of the linear width type voltage regulator is presented and the expressions for selecting and computing the reference voltage and the duty factor are given.
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