The ups and downs of life in the Siheyuan

For two whole days, there were only students in the laboratory, and none of the busy teachers in the past could be seen.

Although confused, the work continues.

Two days later, Li Yuan's explanation ended, and the answers also ended simultaneously.

These professors or teachers are all too difficult to maintain.

When it comes to technical issues, he is really inquisitive. Many times, Li Yuan was unable to answer questions.

A group of people stayed in a small office and listened to and discussed for two consecutive days.

In the end, I have to admire the excellence of Li Yuan's plan.

In fact, it is very simple, just use the internal bus idea instead of the step-by-step transfer idea.

This change is very small, just the register for data transfer is cancelled.

As a result, a large number of tubes and connections can be saved, which can significantly improve the reliability of the product.

At the same time, the transfer link of the intermediate multi-level registers is reduced, the delay is reduced, and the computing power of the computer is improved.

The original design speed of 103 is operations per second. Through optimization, the theoretical speed can be increased to operations per second.

Moreover, the reliability has been greatly improved, and the failure rate will also be significantly reduced.

The most attractive thing is the design of the cooling system.

Li Yuan provides dedicated air ducts for each module.

Instead of the large fan that shares the air duct, each module has its own independent brushless DC fan.

This greatly reduces noise and improves the heat dissipation effect of each module.

For electronic tubes, the lifespan will be doubled for every 5 degrees increase in temperature.

Such changes will greatly improve the reliability and usability of the product.

Li Yuan finally concluded: "Because the brushless silent DC fan is used and the large blower for centralized exhaust is eliminated, the noise will be greatly reduced."

"Your idea is bold and makes sense, but it will increase costs and take up a lot of debugging time."

A teacher in his 30s objected. He was the first person to join the project team following Director Jin.

For the 911 project, they went to the Institute of Computing and Kyoto Radio Factory for many investigations before finalizing a plan.

A sophomore who had just been in the laboratory for less than half a year actually proposed a comprehensive improvement plan.

Although the plan sounded very good, it was still difficult for him to accept it.

It was hard for him to object to the host principle plan, but for the heat dissipation modification, he felt that this student was a bit whimsical.

Li Yuan had an impression of him. In the past two days, this teacher had been the most difficult to deal with.

He had always resented him, but unfortunately he had to endure it in front of so many people.

“This teacher’s question is a very good one, and all teachers must have the same doubts.

In each cabinet, our current module architecture is open, and the best heat dissipation is the power cabinet close to the blower.

However, the core host cabinet, which is far away from the power supply cabinet, does not receive proper heat dissipation.

The current idea is to actively exhaust air, and the temperature of the power supply cabinet is about 15° lower than that of the host cabinet.

This shows that there is no good air convection in the host cabinet.

Although a heat dissipation window is designed on the left cabinet, the effect is not obvious.

We changed our thinking and changed from passive to active. We added an iron cover to the module in the host cabinet and added a brushless silent fan behind it.

In this way, every device can be taken care of."

"The idea is great, but where can I find a brushless silent fan?" the teacher asked again.

Li Yuan was stunned and looked at the other teachers. Director Jin thought about it and shook his head.

Li Yuan suddenly realized that the brushless DC motor was a technology of the s and s.

Now that he had said it, he couldn't take it back.

"I can make a brushless DC motor."

The teachers began to stare at Li Yuan, feeling that the boy in front of them knew everything.

Li Yuanbrain thought quickly, "When I was involved in the development of parallel 4-cylinder engines in the Department of Agricultural Machinery, I discovered that starting DC motors makes a lot of noise and has a short lifespan.

So I kept thinking about how to improve.

I searched a lot of literature in the library and now basically have a brushless solution.

The theoretical demonstration has been completed and it is feasible."

At this time, Director Jin quickly said: "Do you have any different opinions on Xiao Li's plan?"

Everyone looked around and shook their heads.

The teacher opened his mouth, not knowing what to say.

Under Director Jin's stern eyes, he shook his head helplessly.

"Okay, I'll report to the school leaders and prepare for reform.

I saw which module covers were not difficult to process, so Teacher Ge asked the school machinery factory to help make them.

Li Yuan is responsible for researching brushless DC motors, and Teacher Hu leads people to transform the main engine."

Everyone nodded, and the two-day seminar finally came to an end.

Several teachers who had always been optimistic about Li Yuan kept teasing Li Yuan.

"Classmate Li Yuan, please transfer to the computer department!"

"Yeah, staying in the motivation department is a waste."

"When I first saw you, I thought you were from the computer department."

. . . . . .

The teacher couldn't bear the exaggeration of these people, so he walked a few steps quickly without looking back.

Next, several parties acted separately.

Li Yuan began to design brushless DC motors.

The principle of the brushless motor is actually very simple. The biggest difference from the common brush motor is that the rotor becomes a permanent magnet and the coil is wound around the stator.

As the name suggests, the rotor is the rotating body supported by the bearings, and the stator is the stationary part of the motor.

The stator consists of three parts: the stator core, the stator winding and the frame. The main function of the stator is to generate a rotating magnetic field.

The main function of the rotor is to rotate in the rotating magnetic field according to the principle of in-phase and mutual repulsion.

Although I have theoretical knowledge, I have conducted no less than a dozen experiments when winding the stator coil.

After repeated testing, the number of winding turns and wire diameter were finally determined.

Before they finished manufacturing the module cover, Li Yuan made more than 20 brushless DC motors.

When the finished product was displayed, the sound of motor rotation was inaudible, which once again surprised everyone.

"It's amazing, there's no sound at all!"

"Yes, classmate Li Yuan, you can become famous all over the world just by relying on this skill."

"Li Yuan, is this really your design?"

"It's silly. Didn't you see that he stayed there all the time? These things were done under everyone's noses."

"Okay, everyone, go do what you need to do and don't hang around here." Director Jin walked over excitedly.

The students dispersed in a rush.

Most teachers remain where they are.

At this time, the motor was still rotating. Director Jin picked up the motor and said, "It has little vibration and low noise. It's really magical."

Then he looked at Li Yuan strangely.

"What department are you in? How come you can even make electric motors?"

"Hey, leader, you also know that I like to speculate.

I have never been satisfied with the starter motor of the engine before, so I have been thinking about it.

I was lucky this time, and I succeeded after trying.”

"Li Yuan, don't be humble, everyone can see your ability."

Director Jin turned to the other teachers, "Everyone knows what this kind of motor means, so please tell the students not to go outside and talk nonsense."

Everyone's expressions immediately became serious and they nodded.

"Xiao Li, seal all design data and don't leave the laboratory until I notify you."

Li Yuan nodded subconsciously. He was confused by Director Jin's serious expression.