基于單片機(jī)的逆變電源的設(shè)計(jì).doc
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基于單片機(jī)的逆變電源的設(shè)計(jì),摘 要為了實(shí)現(xiàn)蓄電池為一些電器如燈、音響、筆記本供電，根據(jù)dc/dc/ac原理，將12v直流電升壓逆變成220v、50hz的交流電源，主電路采用推挽式電路和單項(xiàng)橋式逆變電路。在dc/dc變換電路中，采用sg3525控制mosfet，并在電路中添加欠壓保護(hù)、濾波電路、直流母線反饋電路和報警電路。在dc/ac變換電路中，采...
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摘 要
為了實(shí)現(xiàn)蓄電池為一些電器如燈、音響、筆記本供電，根據(jù)DC/DC/AC原理，將12v直流電升壓逆變成220v、50Hz的交流電源，主電路采用推挽式電路和單項(xiàng)橋式逆變電路。
在DC/DC變換電路中，采用SG3525控制MOSFET，并在電路中添加欠壓保護(hù)、濾波電路、直流母線反饋電路和報警電路。在DC/AC變換電路中，采用單片機(jī)輸出SPWM控制單相橋式電路，并在電路中添加過壓保護(hù)、欠壓保護(hù)、過流保護(hù)等。當(dāng)蓄電池的電壓過高或過低時逆變電源將停止工作，保護(hù)逆變電源和蓄電池；當(dāng)蓄電池的電壓在正常范圍內(nèi)波動時，輸出電壓不變；當(dāng)輸出電流過大時，單片機(jī)將停止SPWM輸出，保護(hù)電源的器件使負(fù)載正常運(yùn)行。
關(guān)鍵字：逆變；保護(hù)電路；反饋
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 錄
摘 要 ................................................................................................I
Abstract............................................................................................II
第1章 緒 論........................................................................................1
1.1設(shè)計(jì)研究的目的與意義......................................................................1
1.2逆變技術(shù)的發(fā)展現(xiàn)狀 .........................................................................1
1.3逆變技術(shù)的發(fā)展趨勢 .........................................................................2
1.4 本文工作........................................................................................4
第2章 主電路的選擇與設(shè)計(jì).....................................................................6
2.1總體方案設(shè)計(jì)...................................................................................6
2.1.1 方案比較.....................................................................................6
2.1.2 方案論證.....................................................................................7
2.1.3 方案選擇.....................................................................................8
2.2逆變電源技術(shù)的性能要求....................................................................9
2.3 逆變電源的設(shè)計(jì)總體方案...................................................................9
第3章 DC/DC電路的設(shè)計(jì)........................................................................11
3.1 直流/直流變換電路...........................................................................11
3.2 推挽式變換電路................................................................................11
3.3 驅(qū)動電路的研究................................................................................12
3.3.1 驅(qū)動電路.......................................................................................12
3.3.2 SG3525電流模式PWM控制...............................................................13
3.3.3 直流母線閉環(huán)控制...........................................................................14
3.4 直流/直流變換電路中元器件的參數(shù)計(jì)算..................................................17
第4章 DC/AC電路設(shè)計(jì)..............................................................................23
4.1 PWM控制的基本原理...........................................................................23
4.2 PWM逆變電路....................................................................................25
4.3 DC/AC驅(qū)動電路..................................................................................28
4.3.1 TLP250外圍電路..............................................................................28
4.3.2 AT89c52外圍電路............................................................................29
4.3.3 死區(qū)設(shè)置.........................................................................................31
4.4 輸出濾波電路......................................................................................32
4.5 保護(hù)電路............................................................................................33
4.5.1 短路保護(hù)...................................................................................
為了實(shí)現(xiàn)蓄電池為一些電器如燈、音響、筆記本供電，根據(jù)DC/DC/AC原理，將12v直流電升壓逆變成220v、50Hz的交流電源，主電路采用推挽式電路和單項(xiàng)橋式逆變電路。
在DC/DC變換電路中，采用SG3525控制MOSFET，并在電路中添加欠壓保護(hù)、濾波電路、直流母線反饋電路和報警電路。在DC/AC變換電路中，采用單片機(jī)輸出SPWM控制單相橋式電路，并在電路中添加過壓保護(hù)、欠壓保護(hù)、過流保護(hù)等。當(dāng)蓄電池的電壓過高或過低時逆變電源將停止工作，保護(hù)逆變電源和蓄電池；當(dāng)蓄電池的電壓在正常范圍內(nèi)波動時，輸出電壓不變；當(dāng)輸出電流過大時，單片機(jī)將停止SPWM輸出，保護(hù)電源的器件使負(fù)載正常運(yùn)行。
關(guān)鍵字：逆變；保護(hù)電路；反饋
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 錄
摘 要 ................................................................................................I
Abstract............................................................................................II
第1章 緒 論........................................................................................1
1.1設(shè)計(jì)研究的目的與意義......................................................................1
1.2逆變技術(shù)的發(fā)展現(xiàn)狀 .........................................................................1
1.3逆變技術(shù)的發(fā)展趨勢 .........................................................................2
1.4 本文工作........................................................................................4
第2章 主電路的選擇與設(shè)計(jì).....................................................................6
2.1總體方案設(shè)計(jì)...................................................................................6
2.1.1 方案比較.....................................................................................6
2.1.2 方案論證.....................................................................................7
2.1.3 方案選擇.....................................................................................8
2.2逆變電源技術(shù)的性能要求....................................................................9
2.3 逆變電源的設(shè)計(jì)總體方案...................................................................9
第3章 DC/DC電路的設(shè)計(jì)........................................................................11
3.1 直流/直流變換電路...........................................................................11
3.2 推挽式變換電路................................................................................11
3.3 驅(qū)動電路的研究................................................................................12
3.3.1 驅(qū)動電路.......................................................................................12
3.3.2 SG3525電流模式PWM控制...............................................................13
3.3.3 直流母線閉環(huán)控制...........................................................................14
3.4 直流/直流變換電路中元器件的參數(shù)計(jì)算..................................................17
第4章 DC/AC電路設(shè)計(jì)..............................................................................23
4.1 PWM控制的基本原理...........................................................................23
4.2 PWM逆變電路....................................................................................25
4.3 DC/AC驅(qū)動電路..................................................................................28
4.3.1 TLP250外圍電路..............................................................................28
4.3.2 AT89c52外圍電路............................................................................29
4.3.3 死區(qū)設(shè)置.........................................................................................31
4.4 輸出濾波電路......................................................................................32
4.5 保護(hù)電路............................................................................................33
4.5.1 短路保護(hù)...................................................................................
