常用的控制线路的基本回路由以下几部分组成。
The basic circuit of the commonly used control circuit is composed of the following parts.
1、电源供电回路：供电回路的供电电源有AC380V和220V等多种；
1, power supply circuit: the power supply circuit of the power supply circuit has AC380V and 220V.
2、保护回路：保护(辅助)回路的工作电源有单相220、36V或直流220、24V等多种，对电气设备和线路进行短路、过载和失压等各种保护，由熔断器、热继电器、失压线圈、整流组件和稳压组件等保护组件组成；
2. Protection circuit: the working power of protection (auxiliary) circuit has a variety of protection components, such as single phase 220, 36V or DC 220, 24V, and other kinds of protection for electrical equipment and circuit, such as short circuit, overload and loss of voltage. It is composed of fuse, thermal relay, voltage loss coil, rectifying component and voltage stabilizing component.
3、信号回路：能及时反映或显示设备和线路正常与非正常工作状态信息的回路，如不同颜色的信号灯，不同声响的音响设备等；
3, signal circuit: the circuit that can reflect or display the normal and abnormal working state information of the equipment and line in time, such as different color signal lights, sound equipment with different sound and so on.
4、自动与手动回路：电气设备为了提高工作效率，一般都设有自动环节，但在安装、调试及紧急事故的处理中，控制线路中还需要设置手动环节，通过组合开关或转换开关等实现自动与手动方式的转换；
4, automatic and manual circuit: in order to improve working efficiency, electrical equipment usually has automatic link, but in the installation, debugging and emergency handling, the control line also needs to set manual link, through combination switch or switch switch to realize automatic and manual conversion;
5、制动停车回路：切断电路的供电电源，并采取某些制动措施，使电动机迅速停车的控制环节，如能耗制动、电源反接制动，倒拉反接制动和再生发电制动等；
5, braking stop circuit: cut off the power supply of the circuit, and take some braking measures to make the motor quickly stop the control link, such as energy consumption brake, power back connection brake, reverse pull back brake and regenerative braking and so on.
6、自锁及闭锁同路：启动按钮松开后，线路保持通电，电气设备能继续工作的电气环节叫自锁环节，如接触器的动合触点串联在线圈电路中。两台或两台以上的电气装置和组件，为了保证设备运行的安全与可靠，只能一台通电启动，另一台不能通电启动的保护环节，叫闭锁环节。如两个接触器的动断触点分别串联在对方线圈电路中。
6, self locking and locking the same way: after the start button is loosened, the line remains electrified, the electrical link that the electrical equipment can continue to work is called the self locking link, such as the contact contact contact of the contactor in series in line circuit. Two or more than two electrical devices and components, in order to ensure the safety and reliability of the operation of the equipment, only one power start, the other can not be energized to start the protection link, called the locking link. For example, the contact points of the two contactors are respectively connected in series with each other's coil circuits.