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Understanding the Basics of DC Power Supplies
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From Kele Inc.
BAS interface devices (such as output transducers, multiplexers and transmitters) typically require 24 VDC power. Since building power is 120 volts or greater and of the AC variety, a power supply is required to obtain the 24 volts DC necessary to operate these devices. Accurate selection and sizing of the DC power supply are very important to ensure proper operation of the powered devices. However, this procedure is sometimes neglected. Power supplies used for BAS control devices perform several important functions including: voltage transformation, rectification, filtering, and regulation. Products & Services
DC power supplies accept an input power and output the desired form of DC power. Common types of DC power supplies include linear power supplies, switching power supplies, DC-DC converters, and silicon controlled rectifier (SCR) type power supplies.
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Y. M. Lai, Ph.D.,
Department of Electronic and Information Engineering, The Hong Kong Polytechnic University,
Hong Kong
23.1 Introduction
Power supplies are used in most electrical...
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