文档介绍：单相正弦逆变电源
摘要:本作品设计了由STM32输出SPWM信号控制的逆变电源,实现以12V直流电源输入,36V正弦交流电输出。本电源采用Boost升压和全桥逆变两级变换,在前级Boost升压电路中,采用UC3842芯片进行PWM控制。逆变部分采用IR2110驱动芯片及MOS开关管进行全桥逆变,可直接通过程序进行SPWM调制,从而改变交流输出频率。输出交流信号通过AD637进行有效值转换后,再由STM8单片机进行模数转换,并将电压值等工作状态显示在LCD12864上。在电路保护上,采取了过压过流保护,增强了该电源的可靠性和安全性。经测试,该电源输出信号稳定、效率高,有良好的人机交互界面,是理想的单相正弦逆变电源解决方案。
关键词:单相正弦波逆变、SPWM、Boost升压、全桥逆变
Single Phase Sine Inverter Power Supply
Abstract: this work was designed by STM32 output SPWM control signal of inverter power supply, implementation to the 12 v dc power input, 36 v sinusoidal alternating current output. The power supply adopts the Boost booster and full bridge inverter two-stage transformation, in the first level Boost booster circuit, using UC3842 PWM control chip. Inverter part driven by IR2110 chip to the full bridge inverter and MOS switch tube, can be directly programmed for SPWM modulation, which changes ac output frequency. Output ac signal through the AD637 RMS conversion after, again by STM8 modulus conversion, single-chip and voltage value on work status display LCD12864, etc. On the circuit protection, adopted the over-voltage and over-current protection, enhance the reliability and security of the power supply. After test, the power supply output signal stability, high efficiency, has the good puter interaction interface, is the ideal single-phase sine inverter power supply solutions.
Keywords: Single-phase sine wave inverter, SPWM, Boost booster, Full bridge inverter
目录
1. 设计任务及要求 4
设计任务 4
设计要求 4
2. 总体方案设计 5
方案论证与选择 5
DC-DC变换器方案论证及选择 5
DC-AC变换器方案论证及选择 6
辅助电源方案论证及选择 6
整体方案 7
3. 单元模块设计 8
DC-DC变换器设计 8
DC-AC逆变器设计 9
SPWM设计 10
SPWM波的原理 10
实现方法 11
真有效值转换电路设计 12
辅助电源设计 13
4. 控制程序设计 14
STM8控制及状态显示程序流程 14
STM32 SPWM控制程序流程 15
5. 系统调试 15
软件调试 15
硬件调试 16
6. 系统功能及指标参数 17
测试仪器 17
测试项目及结论 17
7. 设计总结 17
参考文献 18
1. 设计任务及要求
设计任务
设计并制作输出电压为36VAC的单相正弦波逆变稳压电源。输入为12VDC电源,负载为阻性。电路结构图如下图