BENTLY NEVADA 90120-02-xx 15617-01

BENTLY NEVADA 90120-02-xx 15617-01

BENTLY NEVADA 90120-02-xx 15617-01

联系人:刘经理

电话:0592-5580706   15359273796

1．基本原则
化整为零、顺藤摸瓜、先主后辅、集零为整、安全保护、全面检查。
采用化整为零的原则以某一电动机或电器元件（如接触器或继电器线圈）为对象，从电源开始，自上而下，自左而右，逐一分析其接通断开关系。
2．分析方法与步骤
①分析主电路
无论线路设计还是线路分析都是先从主电路入手。主电路的作用是保证机床拖动要求的实现。从主电路的构成可分析出电动机或执行电器的类型、工作方式，起动、转向、调速、制动等控制要求与保护要求等内容。
②分析控制电路
主电路各控制要求是由控制电路来实现的，运用“化整为零”、“顺藤摸瓜”的原则，将控制电路按功能划分为若干个局部控制线路，从电源和主令信号开始，经过逻辑判断，写出控制流程，以简便明了的方式表达出电路的自动工作过程。
③分析辅助电路
辅助电路包括执行元件的工作状态显示、电源显示、参数测定、照明和故障报警等。这部分电路具有相对独立性，起辅助作用但又不影响主要功能。辅助电路中很多部分是受控制电路中的元件来控制的。
④分析联锁与保护环节
生产机械对于安全性、可靠性有很高的要求，实现这些要求，除了合理地选择拖动、控制方案外，在控制线路中还设置了一系列电气保护和必要的电气联锁。在电气控制原理图的分析过程中，电气联锁与电气保护环节是一个重要内容，不能遗漏。
⑤总体检查
经过“化整为零”，逐步分析了每一局部电路的工作原理以及各部分之间的控制关系之后，还必须用“集零为整”的方法检查整个控制线路，看是否有遗漏。特别要从整体角度去进一步检查和理解各控制环节之间的联系，以达到正确理解原理图中每一个电气元器件的作用。
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