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1、可控硅触发电路设计摘要：可控硅触发板是通过调整可控硅的导通角来实现电气设备的电压电流功率调整的一种移相型的电力控制器，它的输出触发脉冲具有极高的对称性及稳定性，且不随环境温度变化，使用中不需要对脉冲对称度及限位进行调整。现场调试一般不需要示波器即可完成。目前，正广泛的应用于工业各领域的电压电流调节，适用于电阻性负载、电感性负载、变压器一次侧及各种整流装置等。关键词：可控硅、导通角、触发板、脉冲控制一、 电路设计方案电路的最初设想是根据可控硅触发电路的实用性来进行的，其设计方案可分为以下几个步骤： 1、确立可控硅电路设计的整体思路，并根据现在市场上的可控硅电路进行调查，目的是了解它们的优缺点，以
2、便融入到我们的设计中，使设计的电路更加完善。2、对设计电路进行模块化研究，分别研制出最佳性能。3、对电路的所有元件参数进行整体设计，并利用仿真软件综合计算出元件的最佳参数值4、对整个设计电路进行安装和调试，截止完成整体设计方案。二、电路原理可控硅触发电路是用YC移相式触发板的同步信号VTB，取自于与主回路电源同步的交流电源输入端（无相位要求）。当移相控制电压Vc由05V变化时，移相触发板输出的触发脉冲Vo的起始点后移，使可控硅的触发角从0180变化，导通角从1800变化，从而实现了对负载进行交流调压的目的。并以镍铬、铁铬铝、远红外发热元件及硅钼棒、硅碳棒等为加热元件的温度控制；以单结晶体管构成
3、晶闸管触发电路，盐浴炉、工频感应炉、淬火炉、熔融玻璃的温度加热控制。用整流变压器、调功机（纯电感线圈）、电炉变压器一次侧、直流电机控制，并且采用单相电焊机、电阻焊机、点焊机控制等各种调场合和单相风机水泵调速节能控制，电压、电流、功率、灯光等无级平滑调节。三、 电路模块功能1、 稳压源电路在电路设计中设计一个可供整个电路供电的稳压电压源是相当重要的，他可以说是整个电路的核心部分。而本次试验的电路也设计了一个稳压电源电路，它是利用整流桥实现的全波整流电路和良好的稳压电路。具体原理图如下所示： 2、 脉冲触发及放大电路脉冲触发电路用于完成对输出波形的控制，放大电路用于完成对信号的放大其电路原理图如下
4、所示:3、 移相控制电路移相控制电路用于完成电路相位导通角从0180变化，导通角从1800变化，从而实现了对负载进行交流调压的目的。其电路原理图如下所示：四、 结语对于此试验中可控硅触发电路的设计充分体现出了我们在设计过程中所出现的问题，不管是在电路原理图的设计还是PCB的设计都还有很大的欠缺，主要是对于原理图中元件所处库和PCB中元件封装库的不熟悉，同时对于protel中一些参数设置的模糊。因此，在以后用的学习中我们还更应该大力加强对于protel的熟悉程度，以便于使我们的设计变得高校和快捷。五、 参考文献1 周政新.电子设计自动化实验与训练.北京：机械工业出版社，1998.2 吴培明.电子
5、技术虚拟实验.北京：机械工业出版社，1999.3 赵广林.轻松跟我学Protel 99SE电路设计与制版.北京：电子工业出版社，2006.附录一元器件清单部件类型元件标号封装描述0.1uFC4RAD0.1Capacitor0.1uFC3RAD0.1Capacitor0.047uFC6RAD0.1Capacitor0.47uFC5RAD0.1Capacitor1.5KW1TO-126Potentiometer1.5KW2TO-126Potentiometer1KR17AXIAL0.41uFC2RAD0.1Capacitor1uFC1RAD0.1Capacitor2CP11VD10DIODE0.4
6、Diode2CP12VD6DIODE0.4Diode2CP12VD5DIODE0.4Diode2CP12VD4DIODE0.4Diode2CP12VD9DIODE0.4Diode2CP12VD7DIODE0.4Diode2CP12VD8DIODE0.4Diode2CP12VD1DIODE0.4Diode2CP12VD2DIODE0.4Diode2CW12DWDIODE0.4Zener Diode2KR7AXIAL0.43.3KR6AXIAL0.43CG12BBG7TO-92ANPN Transistor3CG12BBG8TO-92ANPN Transistor3CG12BBG6TO-92ANP
7、N Transistor3CG12BBG2TO-92ANPN Transistor3CG12BBG3TO-92ANPN Transistor3CG12BBG5TO-92ANPN Transistor3CG12BBG4TO-92ANPN Transistor3CG13CBG1TO-92APNP Transistor4*2CZ11XU1D-70Diode Bridge4.7KR3AXIAL0.44.7KR2AXIAL0.46.2KR8AXIAL0.46.2KR9AXIAL0.46.2KR12AXIAL0.410KR5AXIAL0.410KR1AXIAL0.420KR14AXIAL0.430KR11
8、AXIAL0.430KR16AXIAL0.430KR10AXIAL0.4100KR15AXIAL0.4200KR13AXIAL0.4200KR4AXIAL0.42000uFC7RB.2/.4Electrolytic CapacitorAC12VMBSSW9QAC12VTBSSW9QAC36VDBSSW9Q附录二可控硅触发电路原理图附录三可控硅触发电路PCB图顶层底层ag an employment tribunal clai Emloyment tribunals sort out disagreements between employers and employees. You may n
9、eed to make a claim to an employment tribunal if: you dont agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the organisations listed underFurther help. Emp
10、loyment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you sh
11、ould get help straight away from one of the organisations listed underFurther help. ation about dismissal and unfair dismissal, seeDismissal. You can make a claim to an employment tribunal, even if you haventappealedagainst the disciplinary action your employer has taken against you. However, if you
12、 win your case, the tribunal may reduce any compensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are complaining about happened. If your application is
13、received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your compensation if you win the case. T
14、his is known as adamages-based agreement. In England and Wales, your solicitor cant charge you more than 35% of your compensation if you win the case.youre clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by e-mail, click onnearest CAB.For more information about making a claim to an employment tribunal, seeEmployment tribunals.The (lack of) air up th
