本文主要研究内容
作者杨智清（2019）在《用于中子管的数控高压脉冲电源的研制》一文中研究指出：中子管是一种电可控的中子源,与其他中子源相比较,它成本低,重量轻,操作维护简单,防护容易,适于现场流动式检测。中子管可以运行在直流、快脉冲、快-慢脉冲状态。通过中子管离子源数控高压脉冲电源可以控制脉冲发射的频率、宽度和中子产额,以满足实际应用需求。中子管离子源高压直流电源采用反激拓扑与Cockroft-Walton倍压整流电路级联结构进行设计。为实现离子源电源输出电压稳定以及可调,利用ICM7555芯片产生开关管驱动信号和高频运放HA17358设计TYPEI型电压反馈网络,实现0~2.5V外部输入电压对应0~2000V电源输出电压。设计MOSFET栅源两端电容参数,降低MOSFET漏源两端开通和关断电压尖峰,解决2kV直流电源从零起调阶段变压器发出异响的问题。采用PC40材质EI33型号磁芯绕制反激式高频高压变压器,其初级输入电压为24V,次级最高输出电压600V,工作频率40kHz。采用2阶4倍压整流结构实现2kV直流电压输出,为进一步减小电源纹波,对2kV直流电压进行一阶RC低通滤波,降低电源输出电压的交流成分,提高中子产额稳定性。同时设计负载电流检测电路与基准电压源电路,实现电源的过流保护。为实现中子管工作在脉冲模式,采用多管串联IGBT推挽结构对2kV直流电压进行斩波。与传统上下桥臂单管斩波方案相比,多管串联结构降低了单管IGBT的电压应力和成本。利用MAX4428芯片将一路PWM转换成两路不带死区时间的互补PWM,设计RCD硬件延迟电路改变互补PWM下降沿时间,经过74HC14反相施密特触发器高低阈值比较后,可输出3路死区时间可调的互补PWM波,避免上下桥臂开关管直通。应用高速数字电路使得上下三路PWM驱动信号上升沿延迟时间在100ns以内,减小上下桥臂串联IGBT开通和关断的延迟时间差,降低IGBT漏源两端承受过电压的时间,提高电路运行的可靠性。由于IGBT导通和关断的特性不同,上下桥臂IGBT漏极和源极之间的电压在串联工作时分配不均衡,设计由阻容和瞬态抑制二极管组成的静态和动态均压网络,解决IGBT静态和动态开关过程中耐压不足的问题,并给出电压均衡网络参数的选择和计算方法。通过Saber开关电源软件仿真,分析引线分布电感参数对脉冲尖峰电压的影响以及均压网络电容参数和阻尼电阻对脉冲尖峰电压的抑制作用,并通过实际电路测试,验证原理分析的正确性。在满足2kV脉冲电压上升沿时间小于2μs的情况下,通过设计上桥臂阻尼电阻参数和负载端脉冲尖峰电压阻容吸收网络,将2kV脉冲尖峰电压过冲百分比从33.1%降低到14%以下。使用STM32F103ZET6芯片和轨至轨运放TLV2374设计核心控制板和驱动板电路完成高压直流电源的电压电流采集和调节。为提高离子源直流电源调节精度,设计二阶无源低通滤波器完成PWM波到直流信号的转换,用来调节离子源直流电源电压输出。利用LABVIEW开发平台设计上位机界面,完成对直流电源电压电流参数的监控功能以及对脉冲电源触发信号频率、脉宽的调节功能。为确保通信的可靠性,在上位机中加入自定义通信协议,利用LABVIEW字符串匹配控件设计通信协议数据头诊断程序,防止通信数据包解析错误。本文开发的中子管数控高压脉冲电源测试结果如下:在直流工作模式下,直流电源输出电压可在0~2000V范围内连续可调,最大输出功率为40W,输出电压稳定性小于等于0.2%,整体纹波电压比小于0.01%,效率最高可达78.96%;控制板电压和电流采集精度分别为1V和5μA;在脉冲模式下,脉冲电源工作频率可在0~20kHz范围内连续调节,最小脉宽为10μs,2kV脉冲电压上升沿时间和下降沿时间小于2μs,脉冲尖峰电压过冲百分比为13.1%,满足脉冲中子发生器进行元素分析的需求,性能良好。该设备目前运用于中国原子能科学研究院防水型脉冲中子发生器项目中,运行良好,满足项目总体要求。
Abstract
zhong zi guan shi yi chong dian ke kong de zhong zi yuan ,yu ji ta zhong zi yuan xiang bi jiao ,ta cheng ben di ,chong liang qing ,cao zuo wei hu jian chan ,fang hu rong yi ,kuo yu xian chang liu dong shi jian ce 。zhong zi guan ke yi yun hang zai zhi liu 、kuai mai chong 、kuai -man mai chong zhuang tai 。tong guo zhong zi guan li zi yuan shu kong gao ya mai chong dian yuan ke yi kong zhi mai chong fa she de pin lv 、kuan du he zhong zi chan e ,yi man zu shi ji ying yong xu qiu 。zhong zi guan li zi yuan gao ya zhi liu dian yuan cai yong fan ji ta pu yu Cockroft-Waltonbei ya zheng liu dian lu ji lian jie gou jin hang she ji 。wei shi xian li zi yuan dian yuan shu chu dian ya wen ding yi ji ke diao ,li yong ICM7555xin pian chan sheng kai guan guan qu dong xin hao he gao pin yun fang HA17358she ji TYPEIxing dian ya fan kui wang lao ,shi xian 0~2.5Vwai bu shu ru dian ya dui ying 0~2000Vdian yuan shu chu dian ya 。she ji MOSFETshan yuan liang duan dian rong can shu ,jiang di MOSFETlou yuan liang duan kai tong he guan duan dian ya jian feng ,jie jue 2kVzhi liu dian yuan cong ling qi diao jie duan bian ya qi fa chu yi xiang de wen ti 。cai yong PC40cai zhi EI33xing hao ci xin rao zhi fan ji shi gao pin gao ya bian ya qi ,ji chu ji shu ru dian ya wei 24V,ci ji zui gao shu chu dian ya 600V,gong zuo pin lv 40kHz。cai yong 2jie 4bei ya zheng liu jie gou shi xian 2kVzhi liu dian ya shu chu ,wei jin yi bu jian xiao dian yuan wen bo ,dui 2kVzhi liu dian ya jin hang yi jie RCdi tong lv bo ,jiang di dian yuan shu chu dian ya de jiao liu cheng fen ,di gao zhong zi chan e wen ding xing 。tong shi she ji fu zai dian liu jian ce dian lu yu ji zhun dian ya yuan dian lu ,shi xian dian yuan de guo liu bao hu 。wei shi xian zhong zi guan gong zuo zai mai chong mo shi ,cai yong duo guan chuan lian IGBTtui wan jie gou dui 2kVzhi liu dian ya jin hang zhan bo 。yu chuan tong shang xia qiao bei chan guan zhan bo fang an xiang bi ,duo guan chuan lian jie gou jiang di le chan guan IGBTde dian ya ying li he cheng ben 。li yong MAX4428xin pian jiang yi lu PWMzhuai huan cheng liang lu bu dai si ou shi jian de hu bu PWM,she ji RCDying jian yan chi dian lu gai bian hu bu PWMxia jiang yan shi jian ,jing guo 74HC14fan xiang shi mi te chu fa qi gao di yu zhi bi jiao hou ,ke shu chu 3lu si ou shi jian ke diao de hu bu PWMbo ,bi mian shang xia qiao bei kai guan guan zhi tong 。ying yong gao su shu zi dian lu shi de shang xia san lu PWMqu dong xin hao shang sheng yan yan chi shi jian zai 100nsyi nei ,jian xiao shang xia qiao bei chuan lian IGBTkai tong he guan duan de yan chi shi jian cha ,jiang di IGBTlou yuan liang duan cheng shou guo dian ya de shi jian ,di gao dian lu yun hang de ke kao xing 。you yu IGBTdao tong he guan duan de te xing bu tong ,shang xia qiao bei IGBTlou ji he yuan ji zhi jian de dian ya zai chuan lian gong zuo shi fen pei bu jun heng ,she ji you zu rong he shun tai yi zhi er ji guan zu cheng de jing tai he dong tai jun ya wang lao ,jie jue IGBTjing tai he dong tai kai guan guo cheng zhong nai ya bu zu de wen ti ,bing gei chu dian ya jun heng wang lao can shu de shua ze he ji suan fang fa 。tong guo Saberkai guan dian yuan ruan jian fang zhen ,fen xi yin xian fen bu dian gan can shu dui mai chong jian feng dian ya de ying xiang yi ji jun ya wang lao dian rong can shu he zu ni dian zu dui mai chong jian feng dian ya de yi zhi zuo yong ,bing tong guo shi ji dian lu ce shi ,yan zheng yuan li fen xi de zheng que xing 。zai man zu 2kVmai chong dian ya shang sheng yan shi jian xiao yu 2μsde qing kuang xia ,tong guo she ji shang qiao bei zu ni dian zu can shu he fu zai duan mai chong jian feng dian ya zu rong xi shou wang lao ,jiang 2kVmai chong jian feng dian ya guo chong bai fen bi cong 33.1%jiang di dao 14%yi xia 。shi yong STM32F103ZET6xin pian he gui zhi gui yun fang TLV2374she ji he xin kong zhi ban he qu dong ban dian lu wan cheng gao ya zhi liu dian yuan de dian ya dian liu cai ji he diao jie 。wei di gao li zi yuan zhi liu dian yuan diao jie jing du ,she ji er jie mo yuan di tong lv bo qi wan cheng PWMbo dao zhi liu xin hao de zhuai huan ,yong lai diao jie li zi yuan zhi liu dian yuan dian ya shu chu 。li yong LABVIEWkai fa ping tai she ji shang wei ji jie mian ,wan cheng dui zhi liu dian yuan dian ya dian liu can shu de jian kong gong neng yi ji dui mai chong dian yuan chu fa xin hao pin lv 、mai kuan de diao jie gong neng 。wei que bao tong xin de ke kao xing ,zai shang wei ji zhong jia ru zi ding yi tong xin xie yi ,li yong LABVIEWzi fu chuan pi pei kong jian she ji tong xin xie yi shu ju tou zhen duan cheng xu ,fang zhi tong xin shu ju bao jie xi cuo wu 。ben wen kai fa de zhong zi guan shu kong gao ya mai chong dian yuan ce shi jie guo ru xia :zai zhi liu gong zuo mo shi xia ,zhi liu dian yuan shu chu dian ya ke zai 0~2000Vfan wei nei lian xu ke diao ,zui da shu chu gong lv wei 40W,shu chu dian ya wen ding xing xiao yu deng yu 0.2%,zheng ti wen bo dian ya bi xiao yu 0.01%,xiao lv zui gao ke da 78.96%;kong zhi ban dian ya he dian liu cai ji jing du fen bie wei 1Vhe 5μA;zai mai chong mo shi xia ,mai chong dian yuan gong zuo pin lv ke zai 0~20kHzfan wei nei lian xu diao jie ,zui xiao mai kuan wei 10μs,2kVmai chong dian ya shang sheng yan shi jian he xia jiang yan shi jian xiao yu 2μs,mai chong jian feng dian ya guo chong bai fen bi wei 13.1%,man zu mai chong zhong zi fa sheng qi jin hang yuan su fen xi de xu qiu ,xing neng liang hao 。gai she bei mu qian yun yong yu zhong guo yuan zi neng ke xue yan jiu yuan fang shui xing mai chong zhong zi fa sheng qi xiang mu zhong ,yun hang liang hao ,man zu xiang mu zong ti yao qiu 。
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论文作者分别是来自东北师范大学的杨智清，发表于刊物东北师范大学2019-07-08论文，是一篇关于中子管论文,反激拓扑论文,串联论文,推挽式结构论文,脉冲电源论文,东北师范大学2019-07-08论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自东北师范大学2019-07-08论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：中子管论文; 反激拓扑论文; 串联论文; 推挽式结构论文; 脉冲电源论文; 东北师范大学2019-07-08论文;