基于FPGA生成SPWM控制波的逆变电路设计  

Design of Inverter Circuit for Generating SPWM Control Wave Based on FPGA

作　　者：徐冬 徐节 段毅 XU Dong;XU Jie;DUAN Yi(NARI Rail Transit Technology Co.,LTD.,Nanjing 210061,China;Middle School Affiliated to Hubei University of Arts and Science,Xiangyang Hubei 441024,China)

机构地区：[1]南瑞轨道交通技术有限公司,南京210061 [2]湖北文理学院附属中学,湖北襄阳441024

出　　处：《微电机》2024年第10期15-19,共5页Micromotors

摘　　要：在直流电源给交流电动机供电的场合,为了降低输入交流电对电动机的谐波影响、满足不同电动机对不同频率输入电压的需求,要求设计输出理想正弦波、输出电压频率可调的逆变电路。基于FPGA和直接数字式频率合成技术生成SPWM控制波的方法,并考虑降低开关损耗,设计了单相桥式逆变主电路、电压抬升和死区时间形成电路、IR2110驱动电路、开关管保护电路,最终制作实物并用示波器展示开关管驱动信号、不同频率的输出电压波形。测试结果验证了本设计生成的SPWM控制波的有效性、可输出理想的正弦波、输出电压的频率可调且达到1kHz,降低了逆变电路对电动机的谐波影响,适用于需要不同输入电压频率的电动机,进而为直流供电电动机变频调速提供了新思路。In the case of DC power supply to AC motor,in order to reduce the harmonic effect of input AC on motor and to meet the needs of different motors for different input voltage’s frequency,it is necessary to design an inverter circuit with ideal sine wave output and adjustable output voltage frequency.Considering the reduction of switching loss,it designed the single-phase bridge inverter main circuit,voltage rise and dead-zone time formation circuit,IR2110 driver circuit,the switch’s protection circuit,which was based on a method of using FPGA and direct digital frequency synthesis technology to generate SPWM control wave.Finally,it made the actual object and used the oscilloscope to show the switch’s driving signal and the output voltage waveform with different frequency.The test result verified the validity of the SPWM control wave generated by this design and could output ideal sine wave and the frequency of the output voltage could be adjusted and reached to 1kHz,which can be applied to the occasions of various output voltage frequency,and then it provides a new idea for variable frequency speed regulation of DC powered motor.

关 键 词：FPGA SPWM控制波 逆变电路 IR2110驱动电路 死区时间 

分 类 号：TM464[电气工程—电器] TP17[自动化与计算机技术—控制理论与控制工程] TM932[自动化与计算机技术—控制科学与工程] TM382