(Writing about the motor, this chapter is more professional, if you don't like it, don't subscribe; I wrote it simple and easy to understand, but it will be less readable no matter how)

It's December 8th.

The car-building project started in early September. The three-month period that Muyang gave the graduates to make mistakes has passed, and the project was officially launched, heading towards the prototype car.

In the past three months, these graduates have absorbed a lot of knowledge like a big dry sponge, and the company has paid a lot for this.

More than a dozen top-notch cars bought back for 100 to 200 million yuan were disassembled and reassembled by the car project team. They studied and compared the parts of various high-end brand cars. The pretense was broken, and Muyang even asked for a wire-cut anatomical analysis.

Several researchers saw that the Lamborghini sports cars they took apart could not be put back. It crashed one day, and it was the first car that the car project team broke with parts.

The leader of the project team saw that the chairman came to patrol and apologized to him: "Chairman, I'm sorry, it's our fault, the bearing was removed, we can't put it back on, and we screwed up millions of cars like this. "

Mu Yang said indifferently: "These cars were bought for your research, since they are for research, they must be damaged, which is normal.

Now millions and tens of millions of cars do not dare to disassemble and study, how to develop better cars, in the future, we may have to disassemble equipment worth hundreds of millions.

Engage in scientific research*, especially top projects, don't be influenced by these superficial things, and dare to try;

When you research more interesting cars, our competitors will have a headache. They also have to spend millions or even tens of millions to buy our cars and go back to study, and they are still confused.

So, it's nothing to mess it up, it mainly depends on what you've researched and whether it's valuable or not. That's the most important thing. "

After Mu Yang finished speaking, he felt that the researchers couldn't let go. He put on gloves, picked up a sharp hammer, and came to a Rolls-Royce Phantom. The car door, "Boom bang bang" a few times, the glass was shattered by Mu Yang, and the car door also had a few more pits.

A dozen researchers around Muyang watched as a car worth nearly 10 million was smashed by the chairman. Very distressed, but also very shocked by the operation of the chairman.

After Mu Yang smashed it, he handed the hammer to the researchers: "Smash it for me!"

"Chairman, forget it."

"Stop talking, let you smash it, how do you know if this car is solid or not if you don't smash it, how do you know if the car you designed will work if you don't experience it yourself." Mu Yang said sternly, "I will let you all for the past three months. If you make mistakes, if you don't make mistakes, it means that you haven't done enough and you haven't made progress!"

Under Mu Yang's strong request, several researchers who had some mental breakdown still smashed a few times.

Don't smash it, I didn't see the chairman lose his temper.

After smashing it, the feeling is different, the TMD is so cool.

After these people finished smashing, Mu Yang also asked the surrounding researchers to try to smash it, and try to smash it where it felt that it needed to be strengthened.

Half an hour later, this Rolls-Royce was completely unrecognizable, the glass was all shattered, the door had a few more holes, and the headlights were also smashed. It was almost like a car being smashed by a hooligan. If it was repaired, it would cost millions of dollars. Uncertain. . .

! Mu Yang smiled cheerfully: "Look, this door and glass are not strong at all, if we want to build Future 01 and Future 02, if we smash the car, it can be smashed like this, it's too embarrassing, I'm too embarrassed to take it out. Sell."

After he finished speaking, he said, "To be honest, I haven't smashed a car before. I've experienced it this time, and it's pretty cool. Are you happy?"

"Cool!"

"Very cool!"

"I smashed without gloves, and my hands were a little numb from being shaken."

The researcher who smashed the car quickly replied.

Mu Yang glanced at these R&D personnel, especially the few researchers who accidentally damaged the Lamborghini sports car. They no longer had the mentality of collapse before. People with high emotional intelligence knew that the chairman smashed the car in order to break their psychological barriers.

"It's cool. We do research. If we do something wrong, don't feel burdened. Instead, we must learn from our mistakes and find out where we are wrong. Don't make mistakes next time." Mu Yang waved his hand and told everyone Spread out and keep doing things.

The story of Muyang smashing a Rolls-Royce quickly spread in the company. The employees admired the chairman's operational significance, and of course they were shocked. Nearly 10 million cars were smashed, just for the employees to study. No psychological barriers.

Mu Yang's smashing of the car was just a trivial matter, and he was immersed in motor research again.

There are many problems with the motor.

Demagnetization phenomenon, control technology, poor anti-black ability, limited high speed, and difficulty in starting are only descriptions of the superficial phenomenon of technical problems, and should not be used to express technical indicators or parameters.

Technical indicators or technical parameters such as motor power, number of motor poles, protection level, explosion-proof level, peak speed, power density, efficiency, area ratio of high-efficiency area, torque, etc.

It is more accurate to describe the difference between domestic and foreign motors with technical indicators or parameters.

In 2011, and even by 2020, there are still gaps between domestic motors and foreign motors in the following aspects: peak speed, power density, area ratio of high-efficiency area and cooling method.

First, the peak speed.

The peak speed is an important indicator of the drive motor, and it is also the most obvious indicator of the gap between domestic drive motors and foreign motors.

In the case of maximum power operation, the peak speed of most permanent magnet synchronous motors in China is between 4000-6000rpm~www.mtlnovel.com~ and foreign countries are basically above 10000rpm.

Motors of Xinghai Group. The technical theory has reached 13000rpm.

The speed is mainly related to the manufacturing accuracy, process and material of the parts, such as the material of the shaft and bearing, the fit clearance and uniformity.

As far as materials are concerned, shafts are generally forged rather than cast.

Of course, no company is foolish enough to make such a cast material for high-speed shafts.

Shaft materials generally use 35, 45, 40Cr, 45Mn2, 40MnB, 35CrMo, 35Si, 40iMo, etc., and undergo a quenching and tempering heat treatment process.

A high-speed shaft like this requires high temperature resistance, and heat-resistant steel (including Mo) must be used, such as 35CrMo and 40iMo.

The surface of the shaft is worn, so the hardness is required to be high, but the inside of the shaft is required to have enough toughness to not easily break, so it needs to be quenched and tempered. This process is the same as the blade of a household kitchen knife.

The manufacturing nature of 3D printers is similar to that of casting. At present, Muyang cannot solve the problem of the density of 3D printer materials, so he has not developed 3D printers. . .