The article describes the basic requirements for the power source of the metro power supply system, analyzes briefly the features of various power supply modes and their selection.
阐述了地铁供电系统对电源的基本要求，对各种供电方式的特点及其选择作了简要分析。
The paper discusses two operating modes of single-ended flyback switching power supply, constant output voltage mode and constant output power mode.
本文讨论了单端反激式开关电源的两种工作状态：恒压输出状态和恒功率输出状态。
The equipment can change the manner of setting control word for various spare power supply modes to fit various situations by software programmable technology.
这种装置采用软件可编程技术，对不同的备用电源方式，改变整定控制字的方式，从而可适用于各种场合。
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