Chapter 844 Let’s get some new stuff (First two chapters, due to eye problems, another chapter will be released later)
While Tang Shaohui and his colleagues were celebrating the success of the velvet-making process and their admiration for Chief Engineer Gao was endless, comrades from Factory 1218 had already arrived at the reception room of the Third Factory.

Walking in here, Director Pan of Factory 1218 was even a little excited.

Finally I can get in here. 1274 comes here more often, but I, 1218, have rarely been here. Even though the LED technology was provided by Chief Engineer Gao, he only sent a complete set of production information. That stuff has been perfected in Hong Kong Island, so there is no need to trouble Chief Engineer Gao anymore.

So even though Factory 1218 and Gao Zhendong were both well-known in the th Ministry of Machine Building, this was the first time that Director Pan had met Gao Zhendong formally, except for a meeting.

They looked around with a little curiosity at this place which was located in the 17th Ministry of Machine Building but was very famous within the 12th Ministry of Machine Building. In fact, the furnishings in the reception room were very simple, mainly for work, and there was no other useful information.

This reminded Director Pan and Chief Engineer Cui of 1218 of Liu Yuxi's "Praise of the Humble House". This article was really well written, "Mountains are not high, but they are famous if there are immortals living there."

Director Pan and Chief Engineer Cui didn't have to wait long before they saw Gao Zhendong coming in, and they both stood up.

"Hello, Chief Engineer Gao." The two men and their comrades greeted Gao Zhendong.

Putting aside the question of who is asking for help from whom, even in terms of administrative level, Gao Zhendong is almost at the same level as himself. Even Chief Engineer Cui's technical level is still a bit far from Gao Zhendong. As a guest, it's always right to be polite.

Gao Zhendong greeted him and sat down.

"Sit down, sit down, everyone sit down. Thank you for the hard work of making this trip." Gao Zhendong said with a smile.

After a few pleasantries, Gao Zhendong didn't say much and went straight to the point.

"This time, the department has notified you all to come here. I think everyone knows the reason, right?" Gao Zhendong no longer distinguishes between seventeen and twelve. They are all from the department anyway.

Seventeen: This tastes wrong.

Twelve: That’s right.

Director Pan nodded: "The department said that they are going to develop a high-speed electronic switch."

He handed the 1218 ready-to-install information he had prepared in the past few days to Gao Zhendong, who took it and talked while reading it.

"Yes, but not entirely. This electronic switch is just a trigger. In my opinion, your mission, if successful, may be very important, no easier than 1274."

Well, the current situation of 1218 is still good, and it should be the most suitable one for this job.

Gao Zhendong smiled and brought Director Pan and others good news and bad news.

Bad news: heavy task?
Good news: The task is heavy!
It is true to look at things dialectically.

When Factory 1218 heard this, they were overjoyed!

In their understanding, "no easier than 1274" actually means that it is as important as 1274. What kind of task is heavy or not? It doesn't exist.

On the other hand, if the task is not difficult, it would be boring.

"Chief Engineer Gao, could it be related to digital integrated circuits?" Chief Engineer Cui asked cautiously.

Gao Zhendong shook his head: "It may have some relationship in the later stage, but it is not the main one. The most important thing is that you may have to take another path, which is equally important as digital integrated circuits, another branch of semiconductor technology, power semiconductors, power electronic devices."

There are two core branches of semiconductor technology. One is microelectronics technology represented by the work currently done by 1274, which has low power and high integration and is mainly used for information processing.

Another thing is that Gao Zhendong called Factory 1218 over to prepare for another branch, power electronic devices.

Simply put, microelectronics process information, and power electronics process energy. This type of device is the most core device when it is necessary to process and convert electrical energy. It has a wide range of applications, and the four major application directions are related to all aspects of production and life - motor speed control transmission, industrial power supply, power transmission and distribution, and lighting.

If we use some of the most common things that Gao Zhendong will create in the future as examples, new energy electric vehicles and high-speed railways are indispensable.

Of course, the application scope of this thing is far beyond what electric cars and high-speed rail can summarize. A more popular example is the power supply of a computer, not just the switching power supply, but also the motherboard power supply. The garbage man and DIYer talk about how many phases the motherboard has every day, and each phase has at least one power electronic device in it. In fact, the "phase" in these people's mouths is different from the "phase" in the power transmission and transformation profession. It is more appropriate to call it a "path". In fact, power electronics technology has an important application that most people don't know, which is to improve the quality of power supply, improve efficiency, and save energy. It does not produce electricity, but is just a carrier of electricity, but it can make the electricity as little wasted as possible or do more work during the transportation process.

Semiconductor power electronic devices began to develop in the mid-50s with the emergence of thyristors (silicon controlled rectifiers). Like microelectronics, we have certainly made some arrangements in this area. Even if there was no Gao Zhendong, at this point we were also imitating foreign thyristor devices and had some results and products available.

Otherwise, if Gao Zhendong was working on computers, it would probably not be so easy to make the power supply so small.

However, when it comes to technological advancement, just like when Gao Zhendong started working on microelectronics technology for computers, basically don't even think about it. If we can imitate it well, it's already the result of our comrades' hard work.

And now, let alone us, power semiconductors all over the world have some unavoidable problems, otherwise Gao Zhendong would not have thought of developing new components.

Power semiconductors? Could it be thyristors?

As the chief engineer of a semiconductor factory, Mr. Cui still knows something about these things.

"Mr. Gao, you mean thyristor, right? We have several units working on that thing, including the rectifier factory in the northwest, the rectifier research institute in Songjiang, and a research laboratory at the Institute of Electronics in Beijing. They are all working on it." Mr. Cui reminded Gao Zhendong.

Gao Zhendong smiled and said, "So many units are doing this? I really don't know, but it doesn't matter..."

Gao Zhendong really has no idea how many units are doing this now, but it is not a big problem for him.

"Let's develop some new devices that are different from the previous ones." Gao Zhendong stated his purpose.

Although he didn't know how many units were working on it, Gao Zhendong still knew the development process of power electronic devices. Several devices he was planning to develop had not yet been invented in these years.

Gao Zhendong spent some time selecting these devices from numerous power electronic devices. After all, his energy and resources were limited, and he couldn't do everything, so he tried his best and weighed various factors before selecting these.

The selection criteria are also very simple. We must try our best to cover as many application scenarios as possible, and the life cycle of the results must be as long as possible. Each type of device must be able to last for decades, and the technical requirements cannot be too high and must be able to meet the current technological environment.

This work was very tiring for Gao Zhendong. Even though he had done very well in the power electronics exam, it still took him at least a day to recall the characteristics, usage range, life cycle, technical difficulty of various devices and make a comprehensive comparison!
One day!

Just for analysis and comparison, Gao Zhendong has already spent a lot of money.

Putting aside the MCT, SIT, SITH, IGBT, IPM, IEGT, VDMOS which are too far away and have too high requirements, just the more recent ASCR (asymmetric thyristor), TRIAC (bidirectional thyristor), RCT (reverse conducting thyristor), pure SCR (silicon controlled rectifier), GTO (gate turn-off thyristor), GTR (power transistor) etc., it took him a lot of effort.

However, there is a special product. This thing appeared relatively late, but Gao Zhendong really liked it, and it is very useful for low power and high frequency. Coincidentally, Gao Zhendong, this cheater, created certain conditions for the birth of this thing, so he selected it in advance.

Fortunately, they finally selected a few devices to work on. As for the others, there should be people working on them, so Gao Zhendong would not interfere, and at most he would help out when necessary.

When Director Pan and Chief Engineer Cui heard Gao Zhendong talking about developing new components, they became excited. If Chief Engineer Gao said something was new, then it must be new. Imitation was not good enough, and following Chief Engineer Gao to develop new things was the right path.

"Chief Engineer Gao, what components are you going to make?"

However, Gao Zhendong did not rush to say what they were doing, but instead brought the topic back to the original goal: "We'll talk about that later. After all, it's just a prospect. Now let's talk about the starting task, the electronic switch."

Ah, yes, yes, there is also this thing. This is the initial task. Let’s finish this first. Although the comrades of 1218 are a little itchy, they still suppress their curiosity for the time being. Chief Engineer Gao said that we will talk about it later, which means that we can get the answer today anyway. No rush, no rush...

There's no need to worry! They are itching to do something, but it's no use worrying about it.

"Chief Engineer Gao, I have also made some preparations for the electronic switch. In fact, using triodes can theoretically achieve the effect of an electronic switch, but there may be some parameters that require adjustment and optimization of the triodes."

President Cui's skills are still very solid. Gao Zhendong nodded and said, "You are right, but this time we will do it in one step and make an integrated isolating switch."

In principle, what Mr. Cui said was correct, but if you want this triode electronic switch to work reliably, the peripheral circuit will be a bit complicated, and even require multiple triodes to be connected in series, parallel, back-to-back, etc. to complete it. If there are too many discrete components, the circuit board area will not be able to handle it, so Gao Zhendong is ready to take the first step.

Isolating switch?
"Mr. Gao, do you mean to electrically isolate the control circuit and the controlled part?" Mr. Cui felt that things were gradually becoming interesting. Chief Engineer Gao was worthy of being Chief Engineer Gao. The things he wanted to do were always varied and very practical.

(End of this chapter)