With the continuous improvement of modern science and technology and the form of production organization for vocational education, the traditional teaching mode of electric drive control circuit and skills training can no longer meet the requirements of personnel training in secondary vocational schools. It is imperative to construct a teaching mode that conforms to the teaching philosophy of secondary vocational schools. In this paper, the teaching content, teaching methods, teaching means and assessment methods have been reformed, which has improved the teaching quality and cultivated high-quality talents needed by society.
Keywords: teaching content, teaching methods, teaching means and assessment methods
"Electric Drive Control Circuit and Skills Training" is a teaching material which combines theory and practice for mechanical and electrical majors in secondary vocational schools. The traditional teaching method based on "demonstration-imitation" is usually adopted, which is effective for cultivating students' pure professional skills. However, the demand for talents in modern enterprises is increasing, and this traditional teaching method is powerless to cultivate skilled workers who meet the comprehensive quality requirements of the new era and have certain comprehensive ability. Therefore, it is imperative to reform and innovate the teaching and skill training of electric drive control circuit.
First, the reform of teaching content
1. Break the routine and determine the core content. There are several versions of the teaching material "Electric Drive Control Circuit and Skills Training", and the main teaching content system is basically the same. Generally speaking, the contents of all textbooks are seriously lagging behind, the arrangement of knowledge system is unreasonable, there is no horizontal connection with different disciplines, and the cultivation of students' skills is not systematic. Therefore, it is necessary to properly select the key and difficult contents in the textbook, strengthen the horizontal connection between disciplines, pay attention to the pertinence, practicability and scientificity of the contents, delete some contents that are not suitable for reality, and add some teaching contents related to new technologies and new equipment to lay a good foundation for the subsequent course study.
2. Innovative methods to improve the teaching effect. In the arrangement of the teaching content of "electric drive control circuit and skill training", it is generally to introduce all kinds of low-voltage appliances one by one, and then analyze the schematic diagram of each link of electric drive control circuit. Because of the variety of low-voltage electrical appliances and the complexity of teaching content in each class, students feel very boring in the learning process. In teaching, the author carried out reforms. In the theoretical teaching stage, students use drawings to understand and use every kind of electrical appliance. Firstly, the graphics and text symbols in the drawings are compared with the physical objects one by one, and then the principle or operation essentials of electrical appliances are briefly described, and the selection method and standard specifications of electrical appliances are explained. Finally, the working principle of the circuit is briefly introduced, which stimulates students' curiosity.
Second, the reform of teaching methods
1. Implement the case teaching method. Case teaching method is a teaching method that takes cases as teaching tools, guides students to face practical problems, and puts forward basic methods and ways to solve problems through analysis and mutual discussion. It is a bridge between theory and practice.
2. Implement heuristic teaching methods. Heuristic teaching method refers to a teaching method in which teachers, according to the objective laws of teaching tasks and learning, proceed from students' reality and take various methods to inspire students' thinking as the core, so that students can master knowledge through independent thinking and improve their ability to analyze and solve problems.
For example, when talking about the topic of "sequence control", the teacher asked: X62W universal milling machine requires the spindle motor and cooling pump motor to adopt "sequence control", that is, the cooling pump motor can only be started after the spindle motor is started, and the cooling pump motor is controlled by a combination switch. Try to design an electrical control circuit diagram according to the above requirements. Students think boldly according to what they have learned, which fully stimulates their enthusiasm for learning. 3. Implement project teaching method. Project teaching method is to give a relatively independent project to students themselves, and students are responsible for information collection, scheme design, project implementation and final evaluation. Students can understand and master the whole process and the basic requirements of each link through the project. This teaching method can change information from one-way transmission to two-way and multi-way communication, and can effectively solve the problem of students' learning enthusiasm. The implementation of project teaching method in the practical teaching of electric drive control circuit and skills is that teachers break down the overall goal into several small goals on the basis of learning the course syllabus and grasping the overall teaching goal, and refine the content of each learning module into easy-to-master "small projects", through which the overall learning goal is embodied.
Third, reform teaching methods.
1. Using multimedia courseware to assist teaching. Teaching with the help of modern multimedia teaching means has brought great vitality to teaching. Through words, images, animations and sounds, it creates situations, stimulates interest, increases classroom teaching capacity and cultivates students' learning ability. For example, when talking about the unit "basic control circuit of motor", the projector is used to project the circuit diagram on the screen, and the teacher walks among the students, pointing out the circuit diagram with a laser pen and guiding the students to describe its working principle, which not only attracts the students' attention, but also combines static and dynamic, making the boring theory lively and interesting and improving the learning efficiency.
2. Use objects and wall charts to assist teaching. Using physical objects and wall charts to assist teaching is to use various senses to directly perceive objective things, so that students can acquire knowledge, which can effectively attract students' attention and stimulate students' interest in learning. For example, when learning AC contactor, show its structure to students, let each student observe the attraction or release of armature and the closing or opening of each contact, especially ask students to understand the relationship between main contact and auxiliary contact and between normally closed auxiliary contact and normally open auxiliary contact, and then pass it in groups after class to see the real thing, so that students are impressed by the learning content.
Fourth, reform the assessment methods.
The assessment methods of students' grades are implemented in three levels: first, students conduct self-test and self-evaluation according to the grading standards; Second, members of each group will evaluate each other, learn from each other and improve together according to their contributions; Third, the teacher evaluates the team's completion of the project, integrates the three evaluations, and determines the learning evaluation of each student.
As a specialized course of electromechanical specialty, the importance of skill training is self-evident. The traditional teaching mode can no longer meet the social requirements for professionals. Only by making full use of modern educational technology and teaching means, updating teaching methods, improving teaching contents and changing evaluation methods can we improve students' learning enthusiasm and interest and improve their comprehensive quality.
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