With the coming of winter，The final exams for the first semester of junior year are about to begin。In order to allow students to further adapt to the learning rhythm of junior year，Have a deeper understanding of the hard-core professional courses in the first semester of junior year、Understanding of the system，2021 Level 1、2、3、Class 4 is led by study committee members in each class，With the assistance of the squad leader, the orderly implementation is carried out to "help and promote learning，Academic support activities with the theme of "Creating Success Together"，Aims to provide students with excellent academic performance with the key content of the subject、Lecture on key examples，To improve students’ proficiency in mastering knowledge，Cope with exams more calmly。

The four classes in this academic support activity are divided into two groups，1、The first group composed of Class 2 focused on explaining the basic knowledge of electrical engineering，3、The second group composed of 4 classes focuses on after-school exercises on power electronics technology。

November 24，1、Class 2 took the lead in carrying out academic assistance activities，Speaker Shen Tianshuo、The detailed explanation from classmate Huang Kai，The students here have a deeper understanding of the "lightning arrester", an important component responsible for protection in the power grid。Classmate Shen Tianshuo’s lecture is humorous、Explain in simple terms，In a combination of Chinese and English，Introducing the origin of lightning arresters，Let students understand the historical development process of this important invention,Then it goes on to describe how to select the arrester，Shows you the types and usage occasions of lightning arresters in the form of pictures，Enable students to understand theoretical knowledge at the same time，Enhanced understanding of the application of lightning arresters，Lay a solid foundation for engineering practice in future jobs。

Classmate Huang Kai plays it slow and steady、In a down-to-earth and serious style, he explained the working principle of lightning arresters to the students，That is, the arrester is connected in parallel to the protected equipment，When the device voltage rises to a certain level，Relationship by volt-second characteristic curve，The arrester discharges first，Plays the role of protecting equipment。All the students here are thinking deeply，Benefited a lot。

December 1，by 3、The power electronics technology support group composed of Class 4 also carried out academic support activities，Mainly explaining power electronics technology course No. 4、Contents of after-school questions in Chapter 5，Help classmates gain a more thorough understanding of the assignments，At the same time, the lecturer also introduced the problem-solving skills，Help students improve their grades more effectively。

Students Xu Peng and Cui Yue from Class 3 of 2021 explained the calculation problems of the forward circuit in Chapter 5 of the textbook，In addition to the lecture, he also introduced the principle and process of core reset，Combined with PPT and circuit diagram，More intuitive and detailed teaching on the types of questions that must be tested in the final exam，Help students easily deal with this type of calculation problems。

Tang Yu, Class 4, 2021, gave a detailed lecture on the short answer questions of Chapter 4 Inverter Circuit，Introduces four types of commutation and their differences and usage situations、Installation issues of freewheeling diodes in bridge inverter circuits、Problems and functions that should be paid attention to when the inverter circuit is multi-polarized，Let students have a more comprehensive understanding of short answer questions, which may seem simple but are extremely easy to lose points，Further clarified the key points。

The development of this academic assistance activity，It plays a role in promoting learning for both the lecturer and the students who come to attend the class，Reflects the truth-seeking and pragmatism of electrical students、A down-to-earth and willing-to-learn style。The School of Electrical Engineering will continue to carry out a series of academic support activities for the 2021 class，Looking forward to the smooth development of the next event。