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Leng Qijing was right, but this explanation obviously couldn't satisfy pure liberal arts students like Gong Hongwei and Nie Jianzhong, and everyone's eyes became more and more confused. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Seeing the confusion in the eyes of several leaders, Leng Qijing secretly screamed in his heart: the trick was not successful, but it was self-defeating.

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

For Leng Qijing's request for help, Lin Zheng did not refuse, and said: "What Vice Mayor Leng said is very correct, what I said is simpler, everyone knows that the motor wants to work, and the most basic principle is to make the rotor of the motor inside a magnetic field, right?" ”

Lin Zheng's words are very easy to understand, everyone nodded, just the most basic principle of the motor, although everyone is a liberal arts student, but it is mandatory to learn a little basic physics when you are in junior high school, in the electrical part there is a basic introduction to motors and generators, although the knowledge of these years ago has already been returned to the teacher, but the rotor of the motor is in a magnetic field to do rotational motion This point everyone still remembers.

Seeing that everyone nodded, Lin Zheng continued: "To make an inaccurate analogy, the excitation motor is an electromagnet inside, and it can only generate a magnetic field after it is energized, while the permanent magnet motor is made of magnetic materials, which itself has this line, and it does not need to be energized to have a magnetic field." ”

So that's it!

Lin Zheng said it was simple and easy to understand, everyone understood it at once, and one by one suddenly realized, and glared at Leng Qijing dissatisfied: Didn't we understand if you said this earlier?

There is no doubt that Lin Zheng's analogy is not very accurate. But what does it matter if it's not accurate, as long as you can make the leaders understand what this is all about?

Leng Qijing was dumbfounded, and didn't know what to say: I ...... Why didn't I think it could be explained like that?

But it's so urgent. Leng Qijing was really anxious to ask a question: "Mr. Lin, as far as I know, the most advanced motor in the world is a permanent magnet motor, is your motor excited or permanently magnetized?" ”

Hey? The international fashion trend is permanent magnet motors? Leng Qijing's words really attracted everyone's attention, and Nie Jianzhong asked Lin Zheng with a smile: "Yes, Mr. Lin, is your motor permanent magnet or excited?" I'm curious about this question too. ”

This is the second time Leng Qijing has asked, if he doesn't answer, he will inevitably be considered a weak heart, Lin Zheng nodded and said, "This is an excitation motor." ”

Excitation motors? Lin Zheng said this. Several leaders looked at each other, and they were all a little disappointed for a while: Isn't it? This is not a permanent magnet motor? Alas. Why isn't it a permanent magnet motor?

What kind of people are these, Lin Zheng couldn't cry or laugh, and gave Shi Weisheng a vague look.

Shi Weisheng understood and said loudly: "Everyone may have some misunderstanding about this. In fact, permanent magnet motors and excitation motors have their own advantages, and it is not possible to say who is good and who is bad, this mainly depends on the use environment. ”

Shi Weisheng's words are the truth, but unfortunately no one listens to him, and everyone subconsciously thinks that this is Shi Weisheng speaking for his company...... That's understandable, isn't it?

It seems that he can't come forward, Lin Zheng was depressed for a while: What kind of people are these?

Nodding, Lin Zheng said: "Chief Engineer Shi is right, this is really the case, the efficiency of permanent magnet motors is relatively high. It is the main trend of world research, but the shortcomings of permanent magnet motors are also obvious, and the requirements for the use environment are relatively high. I am more afraid of high temperature and vibration, everyone thinks, the motor installed in the car is facing a harsh environment? Relatively speaking, the requirements for temperature and use environment of excitation motors are not so high, although the efficiency of energy use will be a little lower, but the cost is much lower. On the whole, the excitation motor is more calculated. ”

Is that the case? Lin Zheng's words. Everyone couldn't believe it, and subconsciously looked at Leng Qijing: Old Leng, you told our big guys, is this really the case?

Although Leng Qijing was not very reliable before, there was no way, who let Leng Qijing be the only one in his group who knew the most about motors.

But at this time, where did Leng Qijing dare to talk casually? To be honest, at this moment, Leng Qijing already regretted it to death: he said that the excitation motor was not good, but what Lianchuang Technology took out was an excitation motor, didn't he point at the monk and scold the bald donkey! Lin Zheng is a person who is concerned and valued by the chief elder, he is just an abnormal deputy mayor, and there is no conflict of interest with others, why bother to offend people for such a little thing?

Leng Qijing subconsciously wanted to shrink his head.

But how could this kind of thing be something that he could hide if Leng Qijing wanted to? Unless he wants to offend his colleagues, it's best to say something obediently, but then the question arises, is Lin Zheng so easy to offend?

Hiding like this is not a way after all, after hesitating for a moment, Leng Qijing finally said hesitantly: "This ...... It's really like what Mr. Lin said, the energy utilization rate of the permanent magnet motor is a little higher, but the excitation motor is not without advantages, these two kinds of motors can not say who is good and who is bad, they have their own advantages, but also have their own shortcomings, the advantage of the permanent magnet motor is that the magnetic field of the motor is made of permanent magnet material, the motor can maintain its magnetic field without external energy, the excitation motor can not do this, the excitation motor must establish its own magnetic field through the external input voltage and power factor.

However, there are many disadvantages of permanent magnet motors, such as the excitation motor can easily control the strength of its own magnetic field, but the permanent magnet motor can not do this, it is extremely difficult to adjust and control its magnetic field from the outside, or it is basically impossible, and the permanent magnet motor is more delicate, the temperature is too high or too low, the impulse current is too large to produce armature reaction, violent mechanical vibration and other situations may produce irreversible demagnetization, resulting in reduced motor performance or even simply unusable......"

Speaking of this, Leng Qijing looked at Lin Zheng with blank eyes, hoping that Lin Zheng could continue to speak, but he really didn't know what to say.

Anyway, Leng Qijing didn't take good care of Lianchuang Technology, Leng Qijing's face still had to be given, Lin Zheng continued: "This is not the most fatal, the most important thing is that the permanent magnet motor is expensive, the leaders may not know, the permanent magnet motor using ferrite permanent magnet material is okay, the price of a rare earth permanent magnet motor of the same power is at least 3 times more than that of the excitation motor, and the high cost is simply outrageous!" Compared with the permanent magnet motor, the excitation motor is simple, different worries about demagnetization, simple control, high reliability, low cost, although the energy utilization rate is low, but on the whole, the advantages of the excitation motor at this stage are more obvious. ”

When he said this, Lin Zheng couldn't help but think of a powerful existence that uses an excitation motor: Tesla models.

Why is the performance of Tesla Models pure electric vehicles so strong, that it can achieve a maximum power of 300kW with a voltage of only 375V? And the maximum instantaneous power of other motors with an input voltage of more than 500V is only a meagre 110kW, which motor is considered to be the strongest in history?

The reason is very simple, that is, because the excitation ability of the excitation motor on the models is very strong, it can establish a much stronger magnetic field than any permanent magnet motor on the market, the magnetic field is strong, the power is naturally strong, and the final result is that the maximum speed of the excitation motor on the models is only 8600 rpm, the input voltage is only 375V, but the maximum instantaneous power is as high as 310kW, and the maximum torque is 600 N. meters, far more than those competitors who have input voltage and rotational speed than they do.

As soon as Lin Zheng talked about the cost, everyone suddenly understood: Well, if it's because of this reason, it can be understood.

……………………

said a lot, but the car is to be used after all, is the mule or the horse is always to be pulled out to slip away, how is the performance of this power system of Lianchuang Technology, before experiencing it in person, everyone has no bottom in their hearts, but when they sit in the second car, the worries in everyone's hearts quickly disappeared......

"The acceleration of this car is very fast, and it is very quiet, not noisy or bumpy, which is much better than those buses in the city." Gong Hongwei was deeply impressed by the acceleration performance and smooth operation of the No. 2 car, and the secretary couldn't help but be amazed.

Just hearing Gong Hongwei's words, Lai Huaqiang's face became embarrassed, and his face was red and white for a while: Is this the secretary beating himself?

Gong Hongwei was in a really good mood, looking at Lai Huaqiang, who was embarrassed, he actually explained with a kind smile: "Lai, don't think about it, well, the buses are like this." ”

Lai Huaqiang's heart calmed down, and he nodded again and again and said with a sneer: "Yes, what you said is, secretary, this electric bus is indeed much more comfortable than those diesel buses of the bus company...... Mr. Lin, when will your car be officially put into production, with such a comfortable bus, the citizens will be much more comfortable to travel. ”

Lin Zheng turned his head to look at Shi Weisheng.

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

"Why is it taking so long?" As soon as Shi Weisheng's words came out, not only Lai Huaqiang couldn't sit still, but even Gong Hongwei and Nie Jianzhong couldn't sit still, and the two asked in unison.

A year and a half? After a year and a half, the two of them will not be in the seat, and even if they have the credit, it will have nothing to do with them, how can the two not be in a hurry.

"We also want to hurry, but there is no way," Shi Weisheng said with a wry smile: "The company's technology and experience accumulation in passenger cars is still very weak, and the talent gap is also very large. ”

Glancing at Lin Zheng, Shi Weisheng said helplessly: "Even if there is strong support from the company, there are too many debts before, and it always has to come step by step, and a year and a half is already the most optimistic situation." (To be continued)

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