1. Determine the direction of the signal processing flow
2. Divide the unit circuit
3. Analyze the DC power supply circuit
The basic method of circuit diagram recognition1. Look at the picture combined with basic knowledge
Whether you look at power system diagrams or electronic circuit diagrams, you need to have a certain basic theoretical knowledge of electrical engineering and electronic technology. Only by mastering the basic theoretical knowledge related to electrical diagrams can you read circuit diagrams better and more accurately. For example, the forward and reverse control of a three-phase cage asynchronous motor is based on the principle that the rotation direction of the motor is determined by the phase sequence of the three-phase power supply, and the reverse switch or AC contactor is used for commutation to change the rotation of the motor. direction. Another example is the single-phase rectifier circuit, which is based on the unidirectional conductivity of the diode, which converts sinusoidal alternating current into pulsating direct current.
2. Combine the structure, principle and characteristics of circuit components to see the diagram
The circuit diagram is composed of various electronic components. To learn to understand the circuit diagram, you must first understand the structure and function of the various components in the diagram in order to correctly understand the working principle of the circuit diagram. For example, high-voltage isolation switches, fuses, voltage transformers, lightning arresters, etc. are commonly used in high-voltage power supply circuits; various relays, contactors, and control switches are commonly used in low-voltage circuits; various diodes, transistors, and capacitors are commonly used in electronic circuits , Thyristors and various integrated circuits, etc. Therefore, it is very important to understand the function, structure, working principle, mutual control relationship and position and role of these components in the entire circuit, otherwise it will be difficult to understand the circuit diagram.
3. Look at the diagram with a typical circuit
Typical circuits are common basic circuits, such as series and parallel circuits, various motor control circuits, transistor diode rectifier circuits, various filter circuits, transistor amplifier circuits, various gate circuits, etc. No matter how complex the circuit is, there are always several It is composed of a typical circuit. To understand the principle and function of each typical circuit first, and then to combine the typical circuits in series, you can understand a complex circuit in general.
4. Look at the picture combined with relevant information
Before looking at various electrical diagrams, you must first read the technical data and instructions of the electrical diagrams. This helps to understand the general situation of the circuit, to grasp the key points of the picture, and to identify the picture.
5. Look at the picture according to the drawing rules
There are some basic rules for drawing electrical diagrams. These rules are stipulated to strengthen the standardization, versatility and schematicity of drawings. These basic rules have been explained in more detail in this chapter. You can use these drawing knowledge to accurately view the drawings. The basic knowledge of cartography includes:
â‘ When drawing circuit diagrams, various electrical components should use graphical symbols and text symbols that are uniformly prescribed by the international or national standards.
â‘¡The main circuit part is drawn with thick lines, and the control (auxiliary) circuit part is drawn with thin lines.
â‘¢Under normal circumstances, the parts of the same electrical appliance are not drawn together. According to requirements, when it is required to draw scatteredly, it must be marked with the same text symbol in multiple places to facilitate identification.
â‘£ For several components that have completed tasks of the same nature, add a number after the text symbol to show the difference.
Wired Earphones,Earphone With Mic,Wired Earbuds With Mic,In Ear Stereo Earphone
Guangzhou YISON Electron Technology Co., Limited , https://www.yisonearphone.com