...

The east side of Wuliquan, Aershan.

This is a beautiful pasture, a natural golf course, dense forests, short hills, and several military green houses with half a head exposed. Even close to one hundred meters, it is impossible to see that this is a house. I would not expect that there are more than ten floors of space below. The upper floor is a large conference room. The large table made of solid wood looks very rough. More than 20 people stood inside, each of whom was verbal, and they were all over forty or fifty years old.

One of the old professors with gray hair drew a topological structure on the whiteboard, and the watercolor pen hit it hard, shouting: "The weight of the entire high-voltage power generator cannot be reduced because the frequency is not high enough. As we all know, high frequency can make the electrical device smaller and lighter, and the switching frequency of the inverter must be further increased."

Before he could finish his words, another slightly fat old man with cigarettes said fiercely: "Professor Gong, further increase the frequency, the switching loss will also increase accordingly, the electrical energy efficiency will drop seriously, and the electromagnetic interference will also increase. Simply increasing the frequency will not work at all. This is something that college students understand, so there is no need to talk about it."

Professor Gong Shu, who was presenting on the whiteboard, stared at the professor who was just talking and shouted: "Qin Ming, if you don't want me to say anything, you can't just say this, and that's not OK. Then you should come up with a feasible solution?"

Qin Ming was a little angry. He was all authoritative in the power electronics disciplines of major universities in China. He was very polite to each other and did not call him directly. He was displeased at the moment and said angrily: "I will propose a plan, but first of all, your plan won't work."

Huang Jie, who was responsible for receiving these scholars, frowned and felt very distressed. This group of professors and even academicians gathered together to discuss public relations technical problems. It is a big deal to reconcile them.

The people who have been staying in school and doing academic research have a naughty personality and temper, and no one is convinced by anyone. The quarrels are quite fierce when discussing technical issues.

Especially Gong Shu and Qin Ming, these two love to fight the most. Gong Shu is the authoritative electronics of Jianghai University, and Qin Ming is a well-known professor at Peking University of Tsinghua University. These two people have deep grudges, especially when they were rated as academicians. As a result, Gong Shu helped the country solve problems with his research on high-voltage line melting ice. He was rated as an academician of the Academy of Engineering one year before, and Qin Ming was rated as an academician of the second year. Although there was no grudge, they could not be integrated with each other and had to fight for everything.

"The two academicians are doing their own work for the country and are making contributions to the country. Don't hurt the harmony."

Both of them snorted, obviously Huang Jie's harmony was completely useless. Huang Jie sighed helplessly. Although his level was quite low, he didn't even count in front of these scholars.

Gong Shu refused to give in and said, "Then are you talking about your plan?" Then he walked down and gave the position of the whiteboard to Qin Ming.

Qin Ming walked up with a tough bullet and said, "In high-power high-voltage DC generators, conventional switch tubes are used. The switch tubes work in hard switch states, and the switching loss is large, which will inevitably lead to an increase in the chance of damage. Our equipment is used in space, and stability must be the first priority. Once damaged, the loss will be large. Therefore, the switching frequency cannot exceed."

Gong Shu immediately said: "This is nonsense. The switching frequency cannot be increased. The weight of the entire device now is far beyond the requirements. Since you know it is used in space, how much is the cost of sending this device to a little bit more weight?"

"If you lose reliability in order to reduce the weight a little, you will be given it. If you can't repair it, isn't it useless?"

It was about to start arguing again, Huang Jie rubbed his raised temples and said helplessly: "Two academicians, because of the special use of this equipment, they must combine weight and reliability. Both indicators must be met. After all, there are many other equipment, and there is really no way to reduce the requirements."

The other professors were also very dissatisfied and started arguing. They were very relaxed and happy when they first came to this place, but after staying for half a month, quarreling and discussing all day long, they were already bored. They wanted to leave this ghost place where birds could not shit, and they were all well-known professors when they returned.

"How can I do this? The weight requirements are so strict and the frequency is not increased, it is simply impossible."

"And the power source is still solar energy, and the input stage is not stable. Adding an additional unit of voltage stabilization is also weight."

"There is no suitable solution after discussion."

Huang Jie said: "Dear professors, there is a solution to the frequency and reliability. Currently, Simens and Finleys can provide products that are safe and reliable to meet weight. However, they are too expensive and are unwilling to provide technical information and require participation in the launch. How can this key technology be controlled by others? I hope you will work together to solve this problem."

The professors' faces turned red. Foreigners have already made it happen. So many people cannot solve this technical problem, which is embarrassing.

Qin Ming drew several topology on the whiteboard and said: "Soft switching technology must be used to solve the switching losses and switching noise problems in the circuit. If the switching frequency is increased, the weight may meet the standards and the reliability can be guaranteed."

Gong Shu snorted: "Add soft switches such as capacitors and inductors to each switch tube will increase the weight itself. It only increases the weight that the transformer reduces is not enough to make up for the weight gain of these devices."

This is indeed a difficult problem.

The professors here are helpless. The technical parameters of this high-voltage DC generator are too high. No matter which solution is used, they cannot meet all requirements. So far, they cannot propose a feasible topology.

Zhang Zheng, a professor at Nanchen University, said tentatively: "Will it be possible if we use another soft switch technology?"

As an academician, Qin Ming was very powerful and frowned and said, "Xiao Zhang, who are the soft switches you are referring to?"

The famous Professor Zhang became Xiao Zhang in the mouth of Academician Qin. Many students at Nanchen University were afraid of Zhang Zheng, and they were famous for their cold faces. If they encountered a graduate graduation defense, they would basically be a life-and-death life. They were about to make a special change, and they could not bear any sand in their eyes.

Everyone looked at him, but they didn't come a little nervous. At Nanchen University, his territory was calm and gentle, but there were all big guys who were not inferior to him. There were also many older than him, so they naturally became young boys.

"Academician Qin, our previous direction was to add soft switches to the switching devices. Can we design soft switches in the main circuit?"

Qin Ming frowned and said, "Xiao Zhang, since you have an idea, you might as well show it to everyone. Even if you are immature, it can still play a role in attracting jade.")
Chapter completed!