Li Hong | Never stop for innovation, never stop

With the widespread application of electrical electronic technology in different industries such as power systems and electrification transportation, the problem of electromagnetic interference caused by high -frequency switching movements of power semiconductor devices in power electronic devices has become increasingly prominent, and it has become a key issue that restricts the development of the industry.

For this reason, countless scientific researchers have devoted themselves to it and concentrate on attacking. Professor Li Hong from the School of Electrical Engineering, Beijing Jiaotong University is one of them. Over the years, she has been down -to -earth, innovative and scientific research, and facing major needs of the industry. She has made a series of innovative research in the fields of electromagnetic interference and electromagnetic compatibility.

Concentric scientific research,

Join the fruit

Li Hong has been engaged in the study of electromagnetic interference in electrical electronic systems during the master's degree. He studied Zhang Bo, a well -known domestic scholar and a professor at South China University of Technology. In the meantime, she has achieved important innovation results in the chaos control of the electronics converter, and she is the first to propose electromagnetic interference inhibitory internationally based on the electronic electronic converter's electronic converter based on the width of the chaos. Based on this result, after graduating in 2005, Li Hong received a full scholarship in Germany and went to Germany to study a doctorate.

During the PhD, Li Hong conducted in -depth analysis and research on the electromagnetic interference problem of DC transformers, and proposed a series of new electromagnetic interference inhibitory control methods based on chaotic theory. Scholarships and scholarships of the center (DAAD) have participated in international academic conferences and delivered speeches many times.

In the meantime, Li Hong published a cover papers in the "IEEE Circuits and Systems Magazine" in the "Electrical and Electronic Engineers Association". The research results were widely recognized by peers. In 2009, Li Hong wrote a publishing English monograph, and obtained a doctorate degree with excellent grades and embarked on a journey of returning to China.

After returning to China, Li Hong joined Beijing Jiaotong University. Faced with the major demand of electronic and power technology in the domestic power supply industry, she adheres to all the concepts of all actual departure. Compatible issues are carried out research.

In 2013, with its excellent scientific research level and academic potential, Li Hong received funding from the "Youth British Talent Plan" of Beijing Higher School. Since then, it has undertaken the National Natural Science Foundation of China Youth Science Fund, Fund Fund and National Natural Science Foundation of China. At the same time, she hosted one Beijing Natural Science Foundation of China and presided over a number of international cooperation projects and corporate cooperation projects such as the Royal Institute of Engineering and the key projects of the Taida Fund.

In the study, Li Hong proposed the non -linear precise precision description and quantitative method of electromagnetic interference spectrum of electromagnetic transformations, and combined with the actual needs of engineering, it proposed the engineering design method of the chaotic pulse of the chaos vein considering system stability and thermal design. It has been promoted to the application of the chaos pulse to the actual engineering application. At present, this achievement has been applied in different products, and the effective analysis and suppression of electronic electromagnetic electromagnetic interference has been achieved.

With the continuous renewal of semiconductor devices in the electrical electronics field, the new wide -stranded semiconductor devices bring higher efficiency and power density to the on the one hand. The voltage and current conversion rate brings more serious electromagnetic compatibility problems. Often, the electromagnetic interference filter that increases losses and volume is needed, which hinders the further improvement of the efficiency and power density of the electronic electronic device.

To this end, Li Hong's research team has opened up a new research field for this new challenge, and took the lead in proposing the optimization design method of electromagnetic interference without passive filter and active filter based on the width of the chaos. Increased power density and effective inhibition of electromagnetic interference.

She and the team developed a device simulation model that can reflect the transient characteristics of the switch for the new wide -band semiconductor device, and developed a series of effectively suppressing wide -band -band semiconductor devices based on the proposed device model. The new types of active drive circuits and protection circuits have been recognized and applied by cooperative companies; the problem of co -mode electromagnetic interference caused by parasitic parameters in high -frequency electronics converters, based on mathematical derivation, proposed a set of zero -co -model electromagnetic interference modulation methods. The effective inhibitory of high -frequency electromagnetic interference of wide -band semiconductor electrical devices was achieved.

In addition, in recent years, Li Hong has also carried out research on the stability analysis and control problems faced by complex power electronic systems under large -scale new energy power generation. The method of sexual analysis and improvement is committed to solving the difficulty of model modeling and difficulty obtaining effective judgments in the current frequency domain modeling of complex power electronic systems. The above studies were successfully selected into the Beijing Natural Science Foundation of China. The two national natural science fund projects that have been confined to have obtained excellent issues.

In 2018, Li Hong was awarded the title of Sino -Da young scholars by the Delta Environment and Education Foundation (the United States), and was the first female young scholar. In the same year, she successfully approved the National Natural Science Foundation of China Excellent Youth Science Fund project. Due to the outstanding contribution of electromagnetic compatibility, she was invited to serve as deputy chairman of the China Power Society's electromagnetic compatibility special committee. She has won the Science and Technology Progress Award of the China Power Society for the first time. Many papers have won the Excellent Paper Award at domestic and foreign conferences and journals. For more than ten years back to China, Li Hong handed over a satisfactory scientific research answer.

▲ Li Hong led students to participate in the Innovation Competition

Cultivate talents,

Repeated competition awards

In addition to scientific research, Li Hong pays special attention to cultivating innovative talents. As soon as he has the opportunity, students will lead students to participate in international and domestic innovation competitions and exercise their innovative thinking in actual combat.

The International Future Energy Challenge (IFEC) is hosted by the US Department of Energy (DOE), the US Department of Defense (DOD), the National State Energy Officer Association (NASEO) and the American Electronics and Electronic Engineers Association (IEEE). A global college student innovation ability competition is a high -level college student innovation competition in the international new energy power generation field.

From July 19th to 22nd, 2015, at the International Future Energy Challenge (IFEC2015) held at Sheffield University in the United Kingdom, 7 teams entering the Topic B finals are from well -known universities around the world. The strength of each team cannot be underestimated Essence In the end, after fierce competition, the champion and runner -up were strongly won by two teams from China. Among them, Beijing Jiaotong University won the second place -the best control design award. In the collective photo, Li Hong, who was the instructor of the runner -up team, stood in the back row very low -key, smiling. Three years later, Li Hong led the team again to participate in the IFEC 2018, and once again won the third place -the Innovation Award. In 2020, at the Gan Systems Cup 6th University Electronics Application Design Contest hosted by the China Power Society, Li Hong's thin figure appeared again and led graduate and undergraduate students to win the second prize.

For the future, Li Hong has many expectations. Under the global energy crisis, there are many problems in the field of electronic power technology to be solved urgently. Li Hong will lead the team to continue to struggle on the front line of scientific research.

Start from "she",

Caring for female technology workers

"The world needs science and science requires women." Female scientific and technological talents are an important part of my country's scientific and technological talent team, playing a unique and important role in the scientific field.

On December 1, 2018, the Founding Conference of the Women's Scientist Working Committee of the China Power Society and the first female scientist academic forum was successfully held in Baoding City, Hebei Province. At the conference, Li Hong was successfully elected as the chairman. Based on service, helping the growth and development of electrical female technology people has become her new vision.

At present, the Women's Scientist Working Committee of the China Power Society has repeatedly held many times including "Lighting Lighting Life, Beautiful Life of Scientific Research", "New Age of Dreams, Inheriting the Blooming of Fanghua", "Chinese Heart, PE Love ——The well -known experts talk about science and technology to talk about technology Innovation "Electric Women's Scientist Forum.

This forum integrates academic reports, theme discussions, and interactive exchanges. Electric female science and technology workers and young female scientists from all over the country gathered together to communicate and grow together. The atmosphere is very active. As the person in charge of the forum, Li Hong was deeply relieved.

From March 15th to 26th, 2021, the 65th session of the UN Women's Status Committee (NGO CSW65) was held at the United Nations Headquarters of New York. Hold a parallel meeting with the theme "Womenin Engineering -Build Confidence Andcreativity".

The Women's Status Committee is a major global government agency dedicated to promoting gender equality and giving women's power. It played an important role in promoting women's rights, recording the reality of women's lives around the world, formulating global standards for gender equality, and giving women power. Essence

The theme of the 65th session is "Women fully and effectively participate in public life and decision-making, and eliminate violence to realize equality and give all women and girls rights", CPSS-WIS shares through inviting influential technology workers in the field of electrical fields to share Their growth experience and exchange of female science and technology workers between different countries have played a positive role in promoting the development of female technology workers in the field of electrical electrical in China, enhancing self -confidence, and improving creativity.

Starting from "her", caring for female technology workers, Li Hong and the Women's Scientist Working Committee of the China Power Society are working together to create the future.

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