evaluation of scientific development. Nature security type--nature security is to maintenance people of health value for target, through strengthening security based management, and risk management, and equipment management and technology supervision, ensure production in the people, and real, and system, and system, elements security reliable, and harmony unified, full control various against factors, achieved thought no slack, and management no empty document, and equipment no hidden, and system no blocked, and unit zero non-stopped. Quality and efficiency--quality benefit is to adhere to the enterprise \profit and development\ss truth, adhere to the \ctivity, all costs can be controlled, money should not be wasted\ement philosophy, management analysis, to improve management quality, improve cost control capacity and market competitiveness. Innovation of science and technology--science and technology innovation is to play the role of science and technology as the primary productive force, active use of new technologies, new materials, new processes, new equipment, increase investment in science and technology, strengthening scientific and technological training, speeding up transforming scientific and technological achievements, forming a number of proprietary technology, enhancing core competitiveness. Resource-saving-the-resources saving enterprise was to reduce coal consumption, water consumption, electricity at the core, enhance the operation of lean management to realize low consumption, high efficiency, reduce production costs. Second is to strengthen the business, financial, material, information and the optimization of organization and management, saving the internal transaction costs. Harmonious development of harmonious development--is to construct a \onment for development. \he \l security firm and internal management of the internal management measures are effective, harmonious\\prise coordinating development of homeopathy, well, get along with the neighbors better.\prises building intrinsic safety power company goals are: unplanned outage 0 times. Class of disorders 0, 0 is equivalent forced outage rate. No personal njury accident, material and equipment accidents do not occur, no fire, no environmental pollution accident. Enterprise integrated to achieve zero cases of violation, zero accidents, zero. Quality goal is: when generating capacity ≥ 7.5 billion-kilowatt, sales of over 7.11 billion kWh, total profits of ≥ 306.6 million Yuan, ... BFS++、PI、MIS、SCM Information systems infrastructure, fully integrated information system to realize information resources sharing; to expand the breadth and depth of the portal system, information system of Enterprise Management Assistant role to play; to improve the day-to-day operation and maintenance operation record of promoting causes and transfer system; to strengthen the training目录
一、设计目的及要求 ……………………………………………2
(一)设计目的 …………………………………………………2 (二)设计任务及要求 ……………………………………………2 二、各部分功能介绍及详细参数的选择 ……………………………3 (一)电源变压器 ……………………………………………………3 (二)整流电路 ………………………………………………………3 (三)滤波电路 ………………………………………………………4 (四)稳压电路………………………………………………………4 三、仿真模型 ……………………………………………………… 5 (一)总原理图…………………………………………………………5 (二)各阶段波形……………………………………………………6 (三)实验结果与误差分析……………………………………………8 四、设计总结 ………………………………………………………9 五、参考文献 ……………………………………………………9 六、附录……………………………………………………………10
supervision in large and medium goods vehicle. A is established large vehicles and small vehicles classification management of motor vehicle test mode, increased medium van car, and dangerous goods transport car, and school car test project; II is established motor vehicle test regulatory platform, achieved motor vehicle test full process video, and data remote regulatory; three is strictly motor vehicle identification management, equipped with unified of identification equipment and tool, using mobile identification Terminal, and law enforcement records instrument, technology identification means. As to 20XX years June 20 statewide motor vehicle keep volume for 567,408 car, and last year earlier than growth 75,814 car, growth 13.36%; this year January-June, vehicles management section and license archives management section total accepted the motor vehicle registration business 42,543 car times, which registered registration 6,905 car times, and transfer registration 3,592 car times, and change registration 1033 car times, and mortgage registration 696 car times, and cancellation registration 187 car times, and into business 980 car times, and Archives corrections 81 pieces times, and issued test qualified logo 25,429 car times, and other vehicles business 3,640 car times; supervision Survey Sect
一、设计目的及要求 (一)、设计目的
1、结合所学的模拟电子技术的理论知识完成直流稳压电源的课程设计; 2、理论结合实践,把课堂上的知识应用在实践当中,加深对理论知识的理解;3、目的:引导学生自主性学习、研究性学习,加强团队合作,提高创新意识。
(二)、设计任务及要求
1、任务:利用7809、7909设计一个输出±(9~12)V、1A的直流稳压电源。
2、要求:
1)画出系统电路图,并画出变压器输出、滤波电路输出及稳压输出的电压波形和变压器副边的电流波形;
2)输入工频220V交流电的情况下,确定变压器变比; 3)在满载情况下选择滤波电容的大小(取5倍工频半周期); 4)求滤波电容的最大输出电压;
5)求电路中固定电阻阻值和可调电阻的调节范围。
1
evaluation of scientific development. Nature security type--nature security is to maintenance people of health value for target, through strengthening security based management, and risk management, and equipment management and technology supervision, ensure production in the people, and real, and system, and system, elements security reliable, and harmony unified, full control various against factors, achieved thought no slack, and management no empty document, and equipment no hidden, and system no blocked, and unit zero non-stopped. Quality and efficiency--quality benefit is to adhere to the enterprise \profit and development\ss truth, adhere to the \ctivity, all costs can be controlled, money should not be wasted\ement philosophy, management analysis, to improve management quality, improve cost control capacity and market competitiveness. Innovation of science and technology--science and technology innovation is to play the role of science and technology as the primary productive force, active use of new technologies, new materials, new processes, new equipment, increase investment in science and technology, strengthening scientific and technological training, speeding up transforming scientific and technological achievements, forming a number of proprietary technology, enhancing core competitiveness. Resource-saving-the-resources saving enterprise was to reduce coal consumption, water consumption, electricity at the core, enhance the operation of lean management to realize low consumption, high efficiency, reduce production costs. Second is to strengthen the business, financial, material, information and the optimization of organization and management, saving the internal transaction costs. Harmonious development of harmonious development--is to construct a \onment for development. \he \l security firm and internal management of the internal management measures are effective, harmonious\\prise coordinating development of homeopathy, well, get along with the neighbors better.\prises building intrinsic safety power company goals are: unplanned outage 0 times. Class of disorders 0, 0 is equivalent forced outage rate. No personal njury accident, material and equipment accidents do not occur, no fire, no environmental pollution accident. Enterprise integrated to achieve zero cases of violation, zero accidents, zero. Quality goal is: when generating capacity ≥ 7.5 billion-kilowatt, sales of over 7.11 billion kWh, total profits of ≥ 306.6 million Yuan, ... BFS++、PI、MIS、SCM Information systems infrastructure, fully integrated information system to realize information resources sharing; to expand the breadth and depth of the portal system, information system of Enterprise Management Assistant role to play; to improve the day-to-day operation and maintenance operation record of promoting causes and transfer system; to strengthen the training二、各部分功能介绍及详细参数的选择
利用交流电源变换成直流电源的组成方框图如图1所示。
交流电源→变压器→整流电路→滤波电路→稳压电路→负载
图1、直流稳压电源的组成框图
(一)、电源变压器:是降压变压器,它将电网220V交流电压变换成符合需要的交流电压,并送给整流电路,变压器的变比由变压器的副边电压确定。
输入交流电压:220V,50Hz;
变压器选取:因为7809及7909的输出为9V,故最大UL在15V到12V之间,副边电压U2?15/1.2?12.5V,所以变比n?220/12.5?18,使用的变比为18:1的变压器。输入7809及7909的电压为15V左右。
(二)、整流电路:整流电路的任务是将交流电变换成直流电。二极管具有单向导电特性,可以将交变电流变换为单一方向的直流。整流电路的作用是利用二极管的单向导电性,将正负交替的正弦江流电压变换成单一方向的直流脉动电压。
本设计所使用的整流电路为单相桥式整流电路:
图2 、整流电路单元分析图
supervision in large and medium goods vehicle. A is established large vehicles and small vehicles classification management of motor vehicle test mode, increased medium van car, and dangerous goods transport car, and school car test project; II is established motor vehicle test regulatory platform, achieved motor vehicle test full process video, and data remote regulatory; three is strictly motor vehicle identification management, equipped with unified of identification equipment and tool, using mobile identification Terminal, and law enforcement records instrument, technology identification means. As to 20XX years June 20 statewide motor vehicle keep volume for 567,408 car, and last year earlier than growth 75,814 car, growth 13.36%; this year January-June, vehicles management section and license archives management section total accepted the motor vehicle registration business 42,543 car times, which registered registration 6,905 car times, and transfer registration 3,592 car times, and change registration 1033 car times, and mortgage registration 696 car times, and cancellation registration 187 car times, and into business 980 car times, and Archives corrections 81 pieces times, and issued test qualified logo 25,429 car times, and other vehicles business 3,640 car times; supervision Survey Sect