Alternating current contactor teaching instrument

Abstract

The invention discloses an alternating current contactor teaching instrument which comprises an alternating current contactor model KM, a power supply, a voltage regulation measurement circuit and an indication circuit, wherein the alternating current contactor model KM, the power supply, the voltage regulation measurement circuit and the indication circuit are arranged in a transparent shell. The voltage regulation measurement circuit comprises a fuse FU1, an autotransformer T1, a rotary switch SB, a voltmeter V, an ammeter A and an electromagnetic coil of the alternating current contactor model KM. The indication circuit comprises a fuse FU2, a transformer T2, a normally-open contact of the alternating current contactor model KM, a normally-closed contact of the alternating current contactor model KM, an indicating lamp L1 and an indicating lamp L2. The alternating current contactor teaching instrument has visuality and can be experienced, the abstract process can be converted into the visible process, the internal structure and the work principle of the alternating current contactor are observed, electrical parameters can be measured, and the undervoltage protection function of the alternating current contactor can be verified. By means of the experience learning process, the enjoyment of the teaching process is enhanced, lecture participation and learning initiation of students in secondary vocational schools are improved, comprehension and grasping of related knowledge of the alternating current contactor are deepened, and the teaching effect is improved.

Description

technical field [0001] The invention relates to a teaching instrument, in particular to an AC contactor teaching instrument, which is used for auxiliary teaching demonstration of the AC contactor. Background technique [0002] "AC contactor" is one of the core teaching contents of the core course of electrical operation and control major in secondary vocational schools - "Electric Drive Control Circuit and Skill Training". At the same time, "AC contactor" is also the most typical core of commonly used low-voltage electrical appliances One of the devices. In teaching, it is difficult for teachers to explain thoroughly and clearly the structure, working principle, contact action process and undervoltage protection function of AC contactors, because: [0003] 1. The physical shell of the "AC contactor" is black engineering plastic, which is opaque, and students cannot intuitively observe the internal structure of the AC contactor. [0004] 2. If the structural schematic diagr...

AI Technical Summary

Problems solved by technology

[0003] 1. The physical shell of the "AC contactor" is black engineering plastic, which is opaque, and students cannot intuitively observe the internal structure of the AC contactor

[0004] 2. If the structural schematic diagram of the AC contactor is used to explain, students are required to have good image recognition ability and spatial imagination ability, but it is difficult for secondary vocational students to understand the internal structure and working principle of the "AC contactor" according to the structural schematic diagram

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