基于STM32系列单片机的数控正弦波逆变电源设计与实现  

Design and implementation of a sine-wave inverter power supply controlled by STM32

作　　者：赵有以[1] 杨美君[1] 孙佳成[1] 王建民[1] 

机构地区：[1]哈尔滨理工大学应用科学学院,黑龙江哈尔滨150080

出　　处：《电子设计工程》2012年第23期134-136,140,共4页Electronic Design Engineering

摘　　要：提出一种高性能全数字式正弦波逆变电源的设计方案。该方案分为前后两级,前级采用推挽升压电路将输入的直流电升压到350 V左右的母线电压,后级采用全桥逆变电路,逆变桥输出经滤波器滤波后,用隔离变压器进行电压采样,电流互感器进行电流采样,以形成反馈环节,增加电源输出的稳定性。升压级PWM驱动及逆变级SPWM驱动均由STM32单片机产生,减小了硬件开支。基于上述方案试制的400 W样机,具有输出短路保护、过流保护及输入过压保护、欠压保护功能,50 Hz输出时频率偏差小于0.05 Hz,满载(400 W)效率高于87%,电压精度为220 V±1%,THD小于1.5%。This paper presents a design for high-performance all-digital sine wave inverter power, which consists of two stages. In the first stage, we use a pull-push circuit, the input voltage is boosted to about 350 V to serve as bus voltage, in the second stage, a full-bridge inverter circuit is used. The output voltage and current of inverter, filtered with lowpass filter, were sampled by isolating transformer and by current transformer, respectively, so as to form the feedback and increase stability of the output. PWM and SPWM, which serve as control signal in boost stage and inverter stage, respectively, are both generated by STM32. A 400W model machine, based on above idea, has been implemented, which has output short circuit protection, overcurrent Protection, over-voltage protection and under-voltage protection. The frequency deviation is smaller than 0.05 Hz when output frequency is 50Hz. Full-load（40OW） efficiency is higher than 87%, the precision of output voltage is 220V ±1%, THD is lower than 1.5%.

关 键 词：正弦逆变 SPWM 推挽升压 数字式 状态机 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]