单相正弦波逆变电源-设计

1单相正弦波逆变电源摘要：本单相正弦波逆变电源的设计，以12V蓄电池作为输入，输出为36V、50Hz的标准正弦波交流电。该电源采用推挽升压和全桥逆变两级变换，在控制电路上，前级推挽升压电路采用SG3525芯片控制，闭环反馈；逆变部分采用驱动芯片IR2110进行全桥逆变，采用U3990F6完成SPWM的调制，后级输出采用电流互感器进行采样反馈，形成双重反馈环节，增加了电源的稳定性；在保护上，具有输出过载、短路保护、过流保护、空载保护等多重保护功能电路，增强了该电源的可靠性和安全性；输出交流电压通过AD637的真有效值转换后，再由STC89C52单片机的控制进行模数转换，最终将电压值显示到液晶12864上，形成了良好的人机界面。该电源很好的完成了各项指标，输入功率为46.9W，输出功率为43.6W，效率达到了93%，输出标准的50Hz正弦波。关键词：单相正弦波逆变DC-DCDC-ACSPWMAbstract:Thesingle-phasesinewaveinverterpowersupplydesign,batteryasa12Vinputandoutputforthe36V,50HzstandardACsinewave.Theuseofpush-pullpowerboosterandtwofull-bridgeinvertertransform，inthecontrolcircuit,thepre-boostpush-pullcircuitusingSG3525chipcontrol,closed-loopfeedback;inverterdriverICIR2110inparttotheuseoffull-bridgeinverterusingSPWMmodulationU3990F6completed,levelaftertheuseofcurrenttransformeroutputsamplingfeedback.Thefeedbacklinkintheformationofadoubleandincreasethestabilityofpower.Inprotection,withoutputoverload,shortcircuitprotection,overcurrentprotection,theprotectionofmultipleno-loadprotectioncircuit,whichenhancingthereliabilityofthepowersupplyandsafety.ACvoltageoutputoftheAD637TrueRMSthroughconversion,andthenfromthecontrolofsingle-chipSTC89C52analog-digitalconversion,thefinalvalueofthevoltagetotheliquidcrystaldisplay12864ontheformationofagoodman-machineinterface.Thecompletionofthepowergoodindicators,inputpowerto46.9W,outputpowerof43.6W,theefficiencyreached93%,50Hzsinewaveoutputstandards.Keywords:Single-phasesinewaveinverterDC-DCDC-ACSPWM2目录1.系统设计···········································································································41.1设计要求······································································································41.2总体设计方案································································································41.2.1设计思路································································································41.2.2方案论证与比较·······················································································51.2.3系统组成································································································82.主要单元硬件电路设计·························································································92.1DC-DC变换器控制电路的设计·······································································92.2DC-AC电路的设计······················································································102.3SPWM波的实现·························································································102.4真有效值转换电路的设计················································································112.5保护电路的设计···························································································122.5.1过流保护电路的设计············································································122.5.2空载保护电路的设计··············································································132.5.3浪涌短路保护电路的设计········································································142.5.4电流检测电路的设计··············································································152.6死区时间控制电路的设计···············································································152.7辅助电源一的设计························································································152.8辅助电源二的设计························································································152.9高频变压器的绕制························································································172.10低通滤波器的设计······················································································183.软件设计·········································································································183.1AD转换电路的设计······················································································183.2液晶显示电路的设计····················································································194.系统测试·········································································································204.1测试使用的仪器···························································································204.2指标测试和测试结果·····················································································214.3结果分析····································································································2435.结论···············································································································25参考文献············································································································25附录1使用说明··································································································25附录2主要元器件清单·························································································25附录3电路原理图及印制板图················································································28附录4程序清单··································································································3941.系统设计1.1设计要求制作车载通信设备用单相正弦波逆变电源，输入单路12V直流，输出220V/50