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In modern mechanical equipment, stable and reliable power supply is the fundamental prerequisite for ensuring its precision, efficiency, and continuous operation capability. As a core component that converts input electrical energy into stable DC electrical energy required by loads, the performance of switching power supplies directly affects the performance indicators, reliability level, and life-cycle cost of the entire equipment.

Modern building automation systems (BAS) are committed to creating intelligent building environments that are safe, efficient, comfortable, and energy-efficient. As the cornerstone of electrical energy conversion and management, switching power supplies, with their high power density, high efficiency, and excellent controllability, provide stable, reliable, and intelligent power supply guarantees for various electronic devices in BAS.

This paper aims to conduct an in-depth analysis of the core technical characteristics of dedicated switching power supplies suitable for power systems and their application requirements in typical scenarios.