What abilities do you need to possess to become an

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What abilities do you need to possess to become an excellent electrical engineer

what are the competencies required to become an electrical engineer

this must be something that many little friends are confused about. Today, let's talk about what we should do to become an electrical engineer

1. It is very pleasant to use computer to program and debug PL process

2. Be able to draw CAD electrical principle drawings by computer

3. Be able to skillfully use electrical tools to connect and install electrical circuits of equipment according to the design requirements of drawings

4. Be able to carry out field programming and debugging according to the requirements of electromechanical system control

5. Be able to quickly design solutions according to customer requirements


growth stage

1. Programming software learning: master one or more kinds of PLC programming software and products. For example: CoDeSys, CPX CEC, cecx, cecc

2, electrical CAD drawing software learning: according to customers' control requirements for electromechanical system, the system electrical schematic diagram is designed according to industry standards. For example: eplan

3. Touch screen software programming configuration: the high-end man-machine interface gives customers a high-tech feeling. For example: cdpx, design studio

4, electrical control cabinet circuit installation: to move forward to the position of a real electrical engineer, you need to have the first three basic abilities. When the newcomers first entered the factory, they did not know how to start to understand the equipment control principle. They were not proficient in PLC programming. They could not find the last component model, and they could not understand the electrical drawings after reading them for more than half a month. In this way, they would want to change their working environment for one year or even half a year. Therefore, if you want to engage in the industrial control industry, you must be firm in your choice, "find the right way and take the right medicine", and be cruel to yourself while you are young

5. On site commissioning: analyze the causes of system faults and eliminate them. It requires long-term practice and accumulation, constant diligence and love for the industrial control industry


ability breakthrough

1. If you are an electrical engineer in your own company, you only need to be familiar with the electrical equipment of your own company

2. If it is to serve customers, it is not enough to be familiar with only one PLC product. The more skills you master, the more experience you have

3. If you want to become a senior electrical engineer, you also need to learn hydraulic and pneumatic transmission, frequency converter speed control, servo drive, etc. These can be learned and accumulated slowly in the projects where the shear fracture occurs at about 45 degrees after the work bears a great force


outstanding stage

1. Master the process:

for example, in the boiler control system, the drum level is an important control parameter, which reflects the balance relationship between boiler load and feedwater. High drum liquid level will cause steam with water, which is not conducive to the operation of superheater and affects the steam water separation effect; Low liquid level will cause damage to boiler water circulation, affect the operation of economizer, and it is easy to vaporize all water, burn out the boiler or even explode. In addition to the normal factor of heating and vaporization, the factors affecting the drum level include the fluctuation of steam load and feedwater flow. When the load increases suddenly and the pressure of the steam drum decreases suddenly, the water will vaporize rapidly and a large number of bubbles will appear, forming a "false liquid level". Therefore, in the design of control scheme, the three impulse control of liquid level, steam and feed water is often used. If you do not know the process and use a simple liquid level control system, once a "false liquid level" occurs, it will affect production and even cause danger. Therefore, automation engineers must work hard on the process to be proficient in the process

2. Select the appropriate network:

for an automation project (especially a medium and large-scale control system), selecting the network is very important. Some people even put forward the concept that "the network is the controller", so you should be familiar with all kinds of industrial buses and Ethernet protocols. Firstly, the network must be open to facilitate the integration of different devices and the expansion of the future system scale; Secondly, the form of the network should be selected according to the transmission performance requirements of different network levels, which must be tested by the testing machine on the premise of a deeper understanding of the protocol and mechanism of the network standard; In addition, the network standards used at different levels are determined by comprehensively considering the specific issues such as system cost, equipment compatibility and site environmental applicability. The performance of a real-time system can be measured from three aspects: time, reliability and application object

3. Master the scanning principle of PLC:

compared with other control equipment, the most important feature of PLC is "scanning". After the PLC is powered on, it automatically repeats the program scanning and i/o scanning, i.e. input sampling, user program execution and output refresh. The completion of the above three phases is called a scanning cycle. In the input sampling stage, PLC reads in all input states and data in sequence by scanning, and stores them in the corresponding units in the i/o image area which ranks first in the world. After the input sampling, it turns to the user program execution and output refresh stage. Even if the input states and data change, the States and data of the corresponding units in the i/o image area will not change. In the user program execution stage, PLC scans the program (ladder diagram) from top to bottom, from left to right, and refreshes the state of the corresponding unit of RAM storage area or i/o image area according to the result of logical operation. In the output refresh phase, all output latch circuits are refreshed according to the corresponding status and data in the i/o image area, and then the corresponding peripherals are driven by the output circuit. At this time, the real output of PLC is achieved. It can be seen that the process and results of PLC program control are different from those of relay logic circuit, especially involving the sequence of steps and the capture of pulse signals, which are closely related to the scanning principle of PLC. In practice, a large number of program problems come from this, and often incredible results will appear. Therefore, to design the PLC program, we must master the basic principle of PLC

4. Strive for structured programming:

it is the goal of every programmer to comprehensively improve the quality of the program, improve the programming efficiency, and make the program have good readability, reliability, maintainability and good structure. IEC is a standardized programming language for the field of industrial control introduced by the International Electrotechnical Commission (IEC) in 1999. It has the characteristics of openness, portability, structured programming and structured data, strong error detection and correction capabilities, and is suitable for PLC programming. Structured program design is adopted to facilitate the construction of programs (especially complex programs), multi person design, debugging and software management. Although the idea of software engineering has been accepted by most programmers, it is not easy to transform this idea into conscious behavior in the process of software development

5. Pay attention to anti-interference measures:

anti interference measures are particularly important when automation systems are used in harsh industrial sites. In practice, there are often cases of debugging failure or even equipment damage caused by interference

interference of automation system has the following three types of sources:

1) space radiation interference

2) interference introduced by external lines of the system, including power line, signal line, grounding system, etc

3) electromagnetic radiation and line interference inside the system

in view of these interferences, the following measures shall be considered in the project implementation:

1) environmental adaptability and electromagnetic compatibility shall be fully considered in the system structure design and equipment selection

2) adopt power supply with excellent performance to suppress the interference introduced by electricity

3) reasonably select and lay cables and wires

4) isolation device or filter device shall be adopted for hardware

5) take measures to improve the reliability of the software, such as digital filtering, timing correction of reference point potential, information redundancy, etc

6) correctly select the grounding mode, generally one point grounding and series one point grounding

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