直流稳压电源的类型很多,比较而言交流稳压相对较少。在物联网中传感器类型较多,其中交流电桥检测电路如电容式压力检测电桥、电感式物位检测电桥的应用较多,为提高检测精度都需要频率和幅值都很稳定的交流电源。交流电源的负载有容性、感性、电阻性三种情况,本文首先对电阻性负载构建合适的稳压框架结构,再针对RL负载,分析并设计相应的输出滤波电路。介绍的基本电路结构是应用微型计算机反馈控制技术、数控增益放大器、模数转换、脉宽调制、LC脉冲滤波、交流幅值检测、软件定值与比较运算、PID数控增益驱动等电路组成的交流可调稳压电源。经计算机仿真和波形观测,确认能很好地实现高效率的交流电压可调与稳压,为物联网建设增加可选的电源组件。 Many types of DC power supply, AC relatively less voltage regulation. There are many types of sensors in the Internet of things, including AC bridge detection circuit such as capacitive pressure detection bridge, inductive level detection bridge more applications, to improve the detection accuracy requires a stable frequency and amplitude AC power . AC power load capacitive, inductive, resistive three cases, this paper first build a suitable resistive load voltage regulator framework, and then for the RL load, analyze and design the corresponding output filter circuit. Introduced the basic circuit structure is the application of micro-computer feedback control technology, digital gain amplifier, analog-digital conversion, pulse width modulation, LC pulse filtering, AC amplitude detection, software setting and comparison operations, PID digital gain control circuit consisting of AC Adjustable power supply. After computer simulation and waveform observation, it is confirmed that the AC voltage can be regulated and regulated efficiently, and an optional power component can be added to the IoT construction.