2022年开关电源复习总结 .pdf
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1、开关电源技术考试题型:填空,20 分;简答,20 分;画图分析,40 分;综合设计(误差放大器),20 分重要声明:此资料由个人整理,所有内容的正确性、准确性均不保证;若任何人因迷信此资料而造成错复、漏复、甚至是挂科等严重后果,本人概不负责,特此声明。第一章、绪论1.电源可以分为发出电能的电源和变换电能的电源两大类;发出电能的电源如发电机、电池等;变换电能的电源如线性电源、相控电源、开关电源等。变换是把一种形态的电能变换为另一种形态的电能,目的是把粗电变成精电.2.开关电源全电路中的电力电子器件工作在开关状态的电源目的:把粗电变成精电。开关-电力电器件工作在开关状态非线性;高频-电力电子器件工
2、作在高频而非工频;直流-电源输出是直流而非交流.3.开关电源的发展趋势高频化、模块化、数字化、绿色化4.开关电源的组成框图第二章、线性电源及开关电源的提出1.线性电源工作原理、原理图2.线性电源的最小调整电压(NPN)串联 NPN 晶体管的最小压差(Vdc-V0)为 2.5V 第三章、常用元件1.两个电压驱动控制型器件P-MOSFET(功率场效应晶体管、全控、单极型),IGBT(绝缘栅双极型晶体管、全控)均为电压驱动控制型器件P-MOSFET与 IGBT要求有正的持续的驱动电压使其保持为通态,要求有负的持续的电压使其关断并保持为可靠的短态.电压型驱动器件的驱动功率都远小于电流型开关器件.SCR
3、(晶体闸流管、半控)、BJT、GTO(门极可关断晶闸管、全控)均为电流驱动控制型器件。2MOSFET工作在哪两个区间工作在开关状态,即在截止区和非饱和区之间来回转换。3.光隔离、磁隔离器件光隔离一般采用光耦合器;磁隔离的元件通常是脉冲变压器4.TC4424,PC929,EXB840 TC4424是 P-MOSFET的驱动;IGBT的驱动是pc929、HCPL316J,EXB840 5.常用的两种缓冲电路缓冲电路又称吸收电路,抑制器件内因过电压、du/dt、过电流和di/dt,减小器件的开关损耗。关断缓冲电路(du/dt 抑制电路)-吸收器件的关断过电压和换相过电压,抑制 du/dt、减小关断损
4、耗。开通缓冲电路(di/dt 抑制电路)-抑制器件开通时的电流过冲和di/dt,减小器件的开通损耗。复合缓冲电路-关断缓冲电路和开通缓冲电路的结合按能量的去向分类法:耗能式缓冲电路和馈能式缓冲电路(无损吸收电路)通常将缓冲电路专指关断缓冲电路,将开通缓冲电路叫做di/dt 抑制电路。第四章、buck变换器1.原理图文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV
5、3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3
6、M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码
7、:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2
8、HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 Z
9、F3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档
10、编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P2 HV3U7E9S5L7 ZF3M9H7F10U4文档编码:CJ7T2I3A4P
11、2 HV3U7E9S5L7 ZF3M9H7F10U42.工作过程(原理)压降式(BUCK)变换器是一种输出电压等于或小于输入电压的单管非隔离直流变换器.电路由开关管Q1、二极管D1,输出滤波电感Lf 和输出滤波电容Cf 构成。根据输出滤波电感中电流是否连续,BUCK电路可以工作在电流连续模式CCM和电流断续模式 DCM。电感电流连续模式是指输出电感Lf 的电流总是大于零,电感电流断续是指开关管关断期间有一段时间Lf 的电流为零。在这两种工作方式之间有一个工作边界,即在开关管关断区间结束时,Lf 的电流刚好降为零。3.连续模式下的典型波形4简单的计算(V0=?)第五章、Boost变换器1.原理图
12、、工作(过程)原理文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T
13、1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编
14、码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C
15、5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9
16、T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1
17、N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5
18、I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S43.输出电压的调整是通过负反馈环控制开关管Q 的导通时间实现的。若直流负载电流上升,则导通时间会自动增加,为负载提供更多能量。若Vin 下降而Ton
19、不变,则峰值电流即Lf的储能会下降,导致输出电压下降,但负反馈环会检测到电压的下降并通过增大Ton来维持输出电压恒定2.(连续模式)典型波形3.简单的计算(V0 表达式,占空比)第六章、反激变换器1.工作原理开关管 Q1 导通时,变换器 T1 储存能量,负载电流由输出滤波电容Cf 提供;开关管 Q1关断时,变换器T1将储存的能量传送到负载RLd和输出滤波电容Cf,以补偿电容单独提供文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V
20、8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2
21、ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10
22、A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4
23、文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:C
24、T1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T1
25、0F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6 HC1N6V8N5I2 ZG3I10A2T1S4文档编码:CT1C5T10F9T6
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