60s researcher

Chapter 109

On the second day, the grouping of the technical department was completed. One group led by Xu Yan and Zhao Lei was mainly in charge of the harvester, and the other group was led by Ye Gong and Jian Mingyuan in charge of the clutch, water intake and drainage system.The last group is led by Lu Jian, who is responsible for the transmission part of the washing machine.

Three days passed in a flash, and Professor Xie had already safely arrived in Province X. It was rare to see his sister whom he hadn't seen for so many years. Professor Xie was extremely happy.I kept laughing when I called Lu Jian. He said that his sister was in a much happier mood and could already be supported to walk around. He has no projects to research now, and he should stay in X province for a while.

The people who were transferred to the technical department of the electrical appliance factory in the past three days have arrived one after another, leaving only the group led by Mr. Jiang.

At noon on the fourth day, the thyristors needed by Lu Jian were sent to Lu Jian's laboratory by the purchasing department.

Today's thyristors are still ordinary thyristors, which are packaged in metal and have shapes such as bolts, flat plates and round shells.Due to cost reasons, only 10 were purchased this time, and Lu Jian and the others had to be careful with them.

What Lu Jian is going to do this time is a thyristor current-type inverter, which uses a thyristor three-phase bridge rectifier circuit to convert AC into DC.

Just as they started working, Director Zhang led a group of people in.

"Director Zhang?" Seeing the person, Lu Jian quickly put down the things in his hands and walked over. He was still thinking about why Director Zhang suddenly brought so many people here. Didn't he hear that anyone was coming to visit?

"Gong Lu looks quite busy, doesn't he?" Factory Manager Zhang walked in, looked at the laboratory carefully, and saw that several young men inside stopped what they were doing and looked at this side.

"Keep busy, I'm only looking for you, Lu Gong." Afraid of delaying their work, Director Zhang smiled and said to the rest of Lu Jian's team.

"Today is fine, so you can continue to work." Lu Jian replied to Director Zhang, and then gave instructions to the researcher who looked at him with questioning eyes.

The researchers in the laboratory continued to work.

Just when Lu Jian was about to continue talking, a person behind Director Zhang ran out and walked quickly to the table that Lu Jian had used before, on which there were three thyristors.

"Jianggong." Soon a person in the crowd shouted out, with a little anxiety in his tone.

"I'm sorry, Director Zhang, our Jiang Gong has such a personality. Whenever we encounter research he is interested in, we will forget everyone else." The man stood up and walked up to Director Zhang who was full of doubts and surprises. Before meeting Lu, his face was full of apology.

"It's okay, it's okay, Gong Lu and the others were all transferred from Z City Machinery Research Institute, this is Gong Liu, and that is Gong Jiang..." Factory Manager Zhang waved his hand with a smile, and led everyone to Jiang Gong's place Pointing at the location, he introduced everyone to Lu Jian.

"Liu Gong, this is Lu Gong, the person in charge of the technical department of our electrical appliance factory. Although he is young, he has presided over several projects." When Zhang Zhang said this, he boasted three points, seven points and seven points. sincere.

"Hello." Lu Jian stretched out his hand to shake hands with Liu Gong. This Liu Gong was very short, not reaching Lu Jian's shoulders, and very thin. It felt like a gust of wind could blow him away.

"Hahaha, I've heard of Lu Gong's name for a long time. When I saw him today, I found out that he was younger than I thought." Liu Gong also spoke very enthusiastically.

"Thank you." Lu Jian shook his head and withdrew his hand, looked at Jiang Gong who was concentrating on the thyristor, and didn't know whether to ignore it or go up and shake his hand.

"It's like this when Mr. Jiang encounters the research he is interested in. Now even if he is beaten, there is no way to pull him out." The scene was a little embarrassing. Most of the materials related to frequency converters, this is what Mr. Jiang dreamed of.

"It doesn't matter, it doesn't matter. Our scientific research is to have this kind of selfless spirit. Only in this way can we make good research." Director Zhang doesn't care, and Lu Jian will worry about these things in the future.

"No." Seeing Liu Gong looking at him apologetically, Lu Jian replied with a smile, without the slightest concern in his eyes.

Hearing what the two of them said, the worry in Liu Gong's eyes finally subsided. The group of them had just been transferred here and they had to make a good impression, otherwise it would be difficult to work together later.

"Liu Gong, you have also seen this laboratory, or I will take you to the dormitory first?" Zhang Zhang originally planned to take them to the dormitory first. After all, there are many people, but Jiang Gong strongly asked to come to the experiment He had to take a look in the room, and he had no choice but to bring them here. As a result, Jiang Gong didn't want to leave now.

"Jiang Gong is like this..." Liu Gong glanced at Jiang Gong and paused for a few seconds.

"Can I trouble you to find someone to take them to the dormitory first, Jiang Gong and I will stay here first." When he spoke, he looked at Director Zhang, with some hesitation in his tone.

Factory Manager Zhang looked at Lu Jian when he heard what he said, with a questioning look in his eyes.

"Gong Lu, why don't we help here today, and they'll come over tomorrow?" Seeing the direction Zhang was looking at, Gong Liu asked Lu Jian again.

"Yes." Lu Jian nodded and agreed directly. He originally wanted to see Jiang Gong's technology, and now it happened to be an opportunity.

"Director Zhang, you have so many things to do and are so busy, let me make arrangements here."

"Then I'll trouble you." The reason Zhang Zhang spared time to accompany them was because of Jiang Gong and Liu Gong. Since these two were going to stay in the laboratory, he went back first.

"No trouble." Lu Jian sent factory manager Zhang away and arranged for another person to send the six people who came with Mr. Jiang back to the dormitory.

"Liu Gong, did you know about thyristors before?" After everyone left, Lu Jian looked at Liu Gong, who kept his eyes on the table from time to time, and he also looked like he wanted to get started.

"Hey, we have always wanted to do inverter projects. Thyristors are currently the most suitable semiconductor material, so we have some understanding." Liu Gong smiled, picked up a thyristor from the table and looked at it. The price is not low. They I applied several times before but was not approved.

"Then you have come to the right place this time. What we need to do now is the variable frequency motor. This set of equipment will consist of a set of self-controlled frequency converter and a synchronous motor. What we need to do now is to invert the thyristor." The person in front of him is already an experienced researcher, so Lu Jian didn't talk nonsense, and directly introduced the project briefly.

"Does your frequency converter use thyristor three-phase bridge rectifier circuit to convert AC into DC, and then through thyristor three-phase bridge inverter circuit to convert DC into frequency-adjustable AC?" Jiang Gong, who had been silent for a while, suddenly speak.

"That's right." Lu Jian was a little surprised when he heard what he said. What this person said was exactly the method used in his project.

"This is to turn off the thyristor through the leading current supplied by the load, which is especially suitable for the frequency conversion speed regulation system of synchronous motors. But how do you plan to make the load power lead at the output end?" After hearing Lu Jian's answer, he asked again He asked a question with a look of indifference in his eyes.

"Add an LC filter directly to the output." Lu Jian said his solution calmly.

"There is another problem. If a three-phase bridge thyristor is used for rectification, the input waveform distortion will be serious, and the power factor will decrease as the motor speed decreases. Have you thought of a solution?"

"Filter and waveform multiplexing available..."

The initial question and answer turned into a mutual discussion, and even Liu Gong joined in, and the time passed in the constant discussion among the three.

"Lu Gong, your idea is really great. This energy can be fed back to the power grid, and the system can directly operate in four quadrants..." At the end, Jiang Gong was amazed again and again, with admiration written all over his face.

"The current idea is very good, but the actual situation is uncertain. This thyristor was only delivered today." Lu Jian was still a little worried, and he didn't know whether the current level of thyristor could support his technology.

"Lu Gong, can we participate in the research of this frequency converter? Our whole team is very knowledgeable about motors." Hearing that this project has just started, Jiang Gong was excited and anxious, afraid that Lu Jian would arrange them to Go to another project.

"Of course, we now have three teams in the technical department. I'm in charge of the motor. You..."

"Then let's go directly to your group. There are eight of us in total, not too many, so we shouldn't need to split up, right?" Before Lu Jian could finish speaking, Jiang Gong began to talk.

"Yeah, Lu Gong and we are used to working together, don't worry, we don't think we will stick together." Liu Gong on the side also spoke out.

"Don't worry, I never thought of splitting you up." Lu Jian understood what they were thinking, but it was normal. Lu Jian was too young. Generally speaking, in order to maintain his authority, he would split this kind of group.

"That would be great." Both of them were very happy and relieved.

"Actually, my idea is that the eight of you will form a team independently, and Jiang Gong will be in charge. In the early stage, we will work on the variable frequency motor project with us. Our project is a part of the pulsator washing machine. The project time is three months, and after three months We are going to start research on inverter air conditioners, and our plan for the next six months will probably look like this.”

"Really." Jiang Gong really didn't expect that they had a very unpleasant trouble at the Z City Research Institute before, because the project funds were tight, and there has been no result. He didn't expect that not only can he participate in the frequency conversion project here, but even the team can do it. Keep it.

"It's arranged like this for the time being, but we talk according to the project results here, and the team will also have assessments later." The overall atmosphere in the technical department is very good now, and everyone is working hard. Lu Jian doesn't want anyone to destroy it. So what should be said is still to be said.

The author has something to say: the professional knowledge in the article comes from Baidu