基于单片机的逆变电源的设计.doc
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基于单片机的逆变电源的设计,摘 要为了实现蓄电池为一些电器如灯、音响、笔记本供电，根据dc/dc/ac原理，将12v直流电升压逆变成220v、50hz的交流电源，主电路采用推挽式电路和单项桥式逆变电路。在dc/dc变换电路中，采用sg3525控制mosfet，并在电路中添加欠压保护、滤波电路、直流母线反馈电路和报警电路。在dc/ac变换电路中，采...
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摘 要
为了实现蓄电池为一些电器如灯、音响、笔记本供电，根据DC/DC/AC原理，将12v直流电升压逆变成220v、50Hz的交流电源，主电路采用推挽式电路和单项桥式逆变电路。
在DC/DC变换电路中，采用SG3525控制MOSFET，并在电路中添加欠压保护、滤波电路、直流母线反馈电路和报警电路。在DC/AC变换电路中，采用单片机输出SPWM控制单相桥式电路，并在电路中添加过压保护、欠压保护、过流保护等。当蓄电池的电压过高或过低时逆变电源将停止工作，保护逆变电源和蓄电池；当蓄电池的电压在正常范围内波动时，输出电压不变；当输出电流过大时，单片机将停止SPWM输出，保护电源的器件使负载正常运行。
关键字：逆变；保护电路；反馈
Abstract
In order to achieve the battery for some electrical appliances such as lights, sound, laptop power supply, according to DC / DC / AC principles, will reverse into a 12v DC step-220v, 50Hz AC power, the main circuit uses a push-pull circuit and reverse single bridge Variable circuit.
In the DC / DC conversion circuit, using SG3525 control MOSFET, and shipped in that circuit under-voltage protection and filtering circuit, DC bus feedback circuit and alarm circuit. In the DC / AC conversion circuit, the use of single chip single-phase bridge output SPWM control circuit, and in that circuit over-voltage protection, undervoltage protection, overcurrent protection. When the battery voltage is too high or too low will stop working when the power inverter, power inverter and battery protection; when the battery voltage fluctuations within the normal range, the output voltage constant; when the output current is too large, the microcontroller will stop SPWM output to protect the power of the device to load properly.
Keywords：inverter protection circuits feedback
目 录
摘 要 ................................................................................................I
Abstract............................................................................................II
第1章 绪 论........................................................................................1
1.1设计研究的目的与意义......................................................................1
1.2逆变技术的发展现状 .........................................................................1
1.3逆变技术的发展趋势 .........................................................................2
1.4 本文工作........................................................................................4
第2章 主电路的选择与设计.....................................................................6
2.1总体方案设计...................................................................................6
2.1.1 方案比较.....................................................................................6
2.1.2 方案论证.....................................................................................7
2.1.3 方案选择.....................................................................................8
2.2逆变电源技术的性能要求....................................................................9
2.3 逆变电源的设计总体方案...................................................................9
第3章 DC/DC电路的设计........................................................................11
3.1 直流/直流变换电路...........................................................................11
3.2 推挽式变换电路................................................................................11
3.3 驱动电路的研究................................................................................12
3.3.1 驱动电路.......................................................................................12
3.3.2 SG3525电流模式PWM控制...............................................................13
3.3.3 直流母线闭环控制...........................................................................14
3.4 直流/直流变换电路中元器件的参数计算..................................................17
第4章 DC/AC电路设计..............................................................................23
4.1 PWM控制的基本原理...........................................................................23
4.2 PWM逆变电路....................................................................................25
4.3 DC/AC驱动电路..................................................................................28
4.3.1 TLP250外围电路..............................................................................28
4.3.2 AT89c52外围电路............................................................................29
4.3.3 死区设置.........................................................................................31
4.4 输出滤波电路......................................................................................32
4.5 保护电路............................................................................................33
4.5.1 短路保护...................................................................................
为了实现蓄电池为一些电器如灯、音响、笔记本供电，根据DC/DC/AC原理，将12v直流电升压逆变成220v、50Hz的交流电源，主电路采用推挽式电路和单项桥式逆变电路。
在DC/DC变换电路中，采用SG3525控制MOSFET，并在电路中添加欠压保护、滤波电路、直流母线反馈电路和报警电路。在DC/AC变换电路中，采用单片机输出SPWM控制单相桥式电路，并在电路中添加过压保护、欠压保护、过流保护等。当蓄电池的电压过高或过低时逆变电源将停止工作，保护逆变电源和蓄电池；当蓄电池的电压在正常范围内波动时，输出电压不变；当输出电流过大时，单片机将停止SPWM输出，保护电源的器件使负载正常运行。
关键字：逆变；保护电路；反馈
Abstract
In order to achieve the battery for some electrical appliances such as lights, sound, laptop power supply, according to DC / DC / AC principles, will reverse into a 12v DC step-220v, 50Hz AC power, the main circuit uses a push-pull circuit and reverse single bridge Variable circuit.
In the DC / DC conversion circuit, using SG3525 control MOSFET, and shipped in that circuit under-voltage protection and filtering circuit, DC bus feedback circuit and alarm circuit. In the DC / AC conversion circuit, the use of single chip single-phase bridge output SPWM control circuit, and in that circuit over-voltage protection, undervoltage protection, overcurrent protection. When the battery voltage is too high or too low will stop working when the power inverter, power inverter and battery protection; when the battery voltage fluctuations within the normal range, the output voltage constant; when the output current is too large, the microcontroller will stop SPWM output to protect the power of the device to load properly.
Keywords：inverter protection circuits feedback
目 录
摘 要 ................................................................................................I
Abstract............................................................................................II
第1章 绪 论........................................................................................1
1.1设计研究的目的与意义......................................................................1
1.2逆变技术的发展现状 .........................................................................1
1.3逆变技术的发展趋势 .........................................................................2
1.4 本文工作........................................................................................4
第2章 主电路的选择与设计.....................................................................6
2.1总体方案设计...................................................................................6
2.1.1 方案比较.....................................................................................6
2.1.2 方案论证.....................................................................................7
2.1.3 方案选择.....................................................................................8
2.2逆变电源技术的性能要求....................................................................9
2.3 逆变电源的设计总体方案...................................................................9
第3章 DC/DC电路的设计........................................................................11
3.1 直流/直流变换电路...........................................................................11
3.2 推挽式变换电路................................................................................11
3.3 驱动电路的研究................................................................................12
3.3.1 驱动电路.......................................................................................12
3.3.2 SG3525电流模式PWM控制...............................................................13
3.3.3 直流母线闭环控制...........................................................................14
3.4 直流/直流变换电路中元器件的参数计算..................................................17
第4章 DC/AC电路设计..............................................................................23
4.1 PWM控制的基本原理...........................................................................23
4.2 PWM逆变电路....................................................................................25
4.3 DC/AC驱动电路..................................................................................28
4.3.1 TLP250外围电路..............................................................................28
4.3.2 AT89c52外围电路............................................................................29
4.3.3 死区设置.........................................................................................31
4.4 输出滤波电路......................................................................................32
4.5 保护电路............................................................................................33
4.5.1 短路保护...................................................................................
