Leng Qijing was right, but this explanation obviously did not satisfy pure liberal arts students like Gong Hongwei and Nie Jianzhong, and everyone became more and more confused. ∈◆

Seeing the confusion in the eyes of several leaders, Leng Qijing secretly called out in his heart: he failed to show off, but instead made a mistake.

Subconsciously, he turned his head to look at Lin Zheng.

Lin Zheng did not refuse Leng Qijing's request for help and said, "Deputy Mayor Leng is very correct. I am just talking about it. Everyone knows that the most basic principle is to make the rotor of the motor inside a magnetic field, right?"

Lin Zheng's words are easy to understand. Everyone nodded, but it was just the most basic principle of motors. Although everyone is from liberal arts, at least in junior high school, you have to learn some basic physics for compulsory. There is a basic introduction to motors and generators in the electrical section. Although the knowledge from many years ago has been returned to the teacher, everyone still remembers that the rotor of the motor rotates in a magnetic field.

Seeing that everyone nodded, Lin Zheng continued: "To make an inaccurate metaphor, there is an electromagnetic inside the excitation motor, which can only generate a magnetic field after being energized, while the permanent magnet motor is made of magnetic materials. It has this process, and there is a magnetic field without energization."

So that's it!

Lin Zheng’s words were simple and easy to understand, and everyone understood it all at once. They suddenly realized it and stared at Leng Qijing in dissatisfaction: Didn’t we understand if you said this earlier?

There is no doubt that Lin Zheng’s metaphor is not very accurate, but what does it matter if it is inaccurate? As long as the leaders can understand what is going on, it will be done?

Leng Qijing was dumbfounded. I don’t know what to say: I... why didn’t I expect that I could explain this?

However, when Leng Qijing was so anxious, he really had a question: "Mr. Lin. As far as I know, the most advanced motor in the world is the permanent magnet motor. Is your motor exciting or permanent magnet?"

Huh? The international trend is permanent magnet motor? Leng Qijing's words really attracted everyone's attention. Nie Jianzhong smiled and asked Lin Zheng: "Yes, Mr. Lin, is your motor permanent magnet or excitation? I am also very curious about this question."

This is Leng Qijing's second question. If he doesn't answer, he will inevitably be considered guilty. Lin Zheng nodded and said, "We are an exciter motor."

Excitation motor? As soon as Lin Zheng said this, several leaders looked at each other and felt a little disappointed for a moment: No? This is not a permanent magnet motor? Alas, why is it not a permanent magnet motor?

Who are these people? Lin Zheng couldn't laugh and cry, and he gave Shi Weisheng a faint wink.

Shi Weisheng understood and said loudly: "You may have some misunderstandings about this. In fact, permanent magnet motors and excitation motors have their own advantages. They cannot say who is better or worse. This mainly depends on the use environment."

Shi Weisheng's words are the truth, but unfortunately no one listened to him. Everyone subconsciously thought that Shi Weisheng was talking to his company... Is this understandable?

It seems that he will not be able to not show up. Lin Zheng felt depressed: Who are these people?

Nodded, Lin Zheng said: "Mr. Shi said it right, but the fact is true. The efficiency of permanent magnet motors is relatively high, which is the main trend in world research. However, the disadvantages of permanent magnet motors are also obvious, and the requirements for the use environment are relatively high. They are more afraid of high temperatures and vibrations. Think about it, is the use environment faced by motors installed in cars facing a harsh environment? Relatively speaking, the requirements for temperature and use environment of excitation motors are not so high. Although the use efficiency of energy will be a little lower, the cost is much lower. To measure it comprehensively, the excitation motor is more calculated."

Is this true? Everyone was a little embarrassed to believe Lin Zheng's words, and subconsciously looked at Leng Qijing: Lao Leng, you told us all, is this really the case?

Although Leng Qijing was not very reliable before, there was no way. Among the people who made Leng Qijing the most know about motors.

But at this time, Leng Qijing dared to talk casually? To be honest, Leng Qijing was already regretting it at this moment: she said that the excitation motor was not good, but what Lianchuang Technology brought out was an excitation motor. Isn’t this pointing at the monk and scolding the bald donkey? Lin Zheng is a person who is paid attention to and valued by the chief elder. He is just an inconsistent deputy mayor, and he has no conflicts of interests with others. Why bother to offend people for such a little thing?

Leng Qijing subconsciously wanted to shrink her head.

But how could Leng Qijing avoid such a thing just if he wanted to avoid it? Unless he wanted to offend his colleagues, it would be better to say something obediently. But in this way, the problem is also here. Is Lin Zheng so easy to offend?

After all, hiding this way is not a solution. After hesitating for a while, Leng Qijing finally stammered: "This... is really like what Mr. Lin said. The energy utilization rate of permanent magnet motors is higher, but the excitation motor is not without advantages. These two motors cannot be said to be good and bad. They both have their own advantages and disadvantages. The advantage of permanent magnet motors is that the magnetic field of the motor is made of permanent magnet material. After the motor is formed, it does not require external energy to maintain its magnetic field. The excitation motor cannot do this. The excitation motor must establish its own magnetic field through the external input voltage and power factor.

However, permanent magnet motors have many disadvantages. For example, excitation motors can easily control the strength of their own magnetic field, but permanent magnet motors cannot do this. It is extremely difficult to control their magnetic field from the outside, or basically impossible. Moreover, permanent magnet motors are relatively delicate, with too high or too low temperatures, too large impact currents, resulting in armature reactions, violent mechanical vibrations and other situations that may cause irreversible demagnetization, resulting in reduced motor performance and even simply inability to use..."

Speaking of this, Leng Qijing looked at Lin Zheng with a gaze, hoping that Lin Zheng could continue his words. He really didn't know what to say below.

Leng Qijing was not well taken care of by Lianchuang Technology, and Leng Qijing still had to give her face. Lin Zheng continued: "This is not the most deadly. The most deadly thing is that permanent magnet motors are expensive. Leaders may not know that permanent magnet motors with ferrite permanent magnet materials are not bad. A rare earth permanent magnet motor with the same power is at least three times the price of excitation motors. The high cost is simply outrageous! However, compared with permanent magnet motors, excitation motors are simple. They are not worried about demagnetization, simple control, high reliability, and low cost. Although the energy utilization rate is a little low, overall, the advantages of excitation motors are still more obvious at this stage."

When he said this, Lin Zheng couldn't help but think of a powerful existence using excitation motor: Tesla touch dels.

Why is the performance of Tesla's pure electric vehicles so powerful that it can achieve a maximum power of 300kw with a voltage of just 375v? And the maximum instantaneous power of other motors with an input voltage of more than 500v is only a mere 110kw. Which motor is considered to be the strongest in history?

The reason is very simple, because the excitation motor on the Touch dels has a very strong excitation capability, and can establish a magnetic field that is much stronger than any permanent magnet motor on the market. If the magnetic field is stronger, the power will naturally be strong. The final result is that the excitation motor on the Touch dels has a maximum speed of only 8600 rpm and an input voltage of only 375v. However, the maximum instantaneous power is as high as 310kw and the maximum torque distance is 600 Nm, which is far more than those competitors whose input voltage and speed are better than those of their own.

When Lin Zheng talked about the cost issue, everyone immediately looked clear: Well, if it was because of this, it would be understandable.

………………………………………

I said a lot, but the car is finally used. It is a mule or a horse that always has to be pulled out. How is the performance of Lianchuang Technology's power system? Before I experienced it myself, everyone was unsure of it. However, after sitting in car No. 2, everyone's concerns quickly disappeared...

"This car accelerates very quickly, it is also very quiet, neither noisy nor disturbing, it is much better than the buses in the city." The acceleration performance and smooth operation of Bus No. 2 gave Gong Hongwei a deep impression. The secretary couldn't help but be amazed.

Just hearing Gong Hongwei's words, Lai Huaqiang's face became embarrassed, and his face turned red and white: Is this the secretary pounding himself?

Gong Hongwei was in a really good mood. Looking at Lai Huaqiang who looked embarrassed, he actually smiled kindly and explained: "Dad Lai, don't think too much, well, the buses are like this."

Lai Huaqiang's heart was calmed down, and he nodded and said with a flattering smile: "Yes, Secretary, what you said is that this electric bus is indeed much more comfortable than the diesel-engine buses of the bus company... Mr. Lin, when will your bus be officially put into production? With such a comfortable bus, citizens will feel much more comfortable to travel."

Lin Zheng turned his head and looked at Shi Weisheng.

"It will take one and a half at the earliest!" Shi Weisheng said without hesitation.

"Why will it take so long?" As Shi Weisheng said this, not only Lai Huaqiang could not sit still, but even Gong Hongwei and Nie Jianzhong could not sit still. They asked in unison.

One and a half years? In a year and a half, they are probably not in their seats. Even if they make contributions, they have nothing to do with them. How could they not be in a hurry?

"We want to be quick, but there is nothing we can do," Shi Weisheng said with a wry smile: "The company's technology and experience accumulation in passenger buses are still very weak, and the talent gap is also very large. Now we can't even guarantee that the problem of the power system will be solved, let alone the manufacturing of the vehicle?"

Looking at Lin Zheng, Shi Weisheng said helplessly: "Even if the company has strong support, there are too many debts before. We have to go step by step. A year and a half is already the most optimistic situation." (To be continued, please search for Astronomy, novels are better, updated and faster!
Chapter completed!