God-level industrial master

Chapter 188 The Taste of Being Stuck

The first DJ4 electric locomotive of Hongxing Factory entered the car smoothly, and it has been assembled in the assembly workshop for many days. The DJ4 traction motor system of Jiuzhou Industrial Co., Ltd. has also begun to try to manufacture.

After a series of technical preparations, process preparations and production preparations in the early stage, the first batch of traction motors began to be manufactured.

The control system matching the motors has also begun to be manufactured, which is not just a few motors, but the entire traction motor system.

The trial production of the motor was relatively smooth, because Jiuzhou Industrial Co., Ltd. has the experience of successfully manufacturing Shaoshan type traction motors. So far, it has successfully manufactured hundreds of first-class quality and superior performance Shaoshan series traction motors for Hongxing Factory.

It seems that it was a very correct choice to practice with Shaoshan series motors and lay the foundation for the production of DJ4 traction motors.

No, in the newly built large factory building, several DJ4 traction motors are undergoing trial production, and the progress is not bad. Although there are some small technical and quality problems, there are no major problems. Overall, this situation is enough It is very satisfying.

Since it is trying to manufacture, some problems will always be exposed. Like Jiuzhou Industrial Co., Ltd., it is very rare that only some minor problems are exposed after starting the manufacture of DJ4 traction motors.

The production and manufacture of the traction motor went smoothly, but the trial production of the entire DJ4 traction motor system was not smooth.

Logically speaking, with a complete and scientific manufacturing process, detailed technical information, and several motor experts, the manufacturing should be relatively smooth, but it is not.

This is not a technical problem, but an important spare part is missing, and it is still an imported part.

This is the reason why it is difficult for a clever woman to cook without rice.No matter how good your technical level is, and no matter how perfect your technical information is, if you don't have anything, you can only catch blind.

The production of the DJ4 traction motor is going on relatively smoothly, but the motor control system matching it is in trouble.

Zhao Ke was reporting the situation in Tang Fei's office. After listening to the report, Tang Fei frowned, feeling like someone was stuck on his neck for the first time.

This is an imported accessory that needs to be purchased from abroad.

The simple version of the design technical information provided by the system is relatively detailed. There are specifications and models of this kind of accessories. With the specifications and models, it should be possible to purchase them from the international market.

Tang Fei frowned slightly, and said slowly: "This thing is indispensable for our DJ4 traction motor system. Without this thing, we will be in more trouble."

What is this thing that is so important.

This is a semiconductor device widely used on DJ4 electric locomotives, called "IGBT". IGBT is the abbreviation of the English word Insulated Gate Bipolar Transistor, and its Chinese meaning is insulated gate bipolar transistor.

It is a composite fully-controlled voltage-driven power semiconductor device composed of BJT (bipolar transistor) and MOS (insulated gate field effect transistor), which has both high input impedance of MOSFET and low conduction voltage drop of GTR. The advantages.

From a functional point of view, the IGBT is a circuit switch, the advantage is that it is controlled by voltage, the saturation voltage drop is small, and the withstand voltage is high.It is used on strong electricity with a voltage of tens to hundreds of volts and a current of tens to hundreds of amperes.And the IGBT does not use mechanical buttons, it is controlled by the chip.

The IGBT turns the AC power on the power supply side into a DC power of a given voltage, or turns various power into AC power of the required frequency for use by the load.These circuits are collectively referred to as converters.

IGBT is the core device of energy conversion and transmission, commonly known as the "CPU" of power electronic devices, it is widely used in rail transit, smart grid, aerospace, electric vehicles and new energy equipment and other fields.

At present, there is no domestic manufacturer or institution that can produce it, and it needs to be imported.On the DJ4 motor locomotive, this kind of thing is used in many places.

It can only rely on imports. Jiuzhou Industrial Co., Ltd. has contacted several foreign manufacturers that can produce IBGT and reported the model, specification and purchase quantity. The other party either directly refused or did not reply.

Among them, only one American company responded with an offer, but the price was too high, and it felt like being ripped off. Zhao Ke did not agree to the other party's offer for the time being.

"Is that so..."

Tang Fei frowned, and walked slowly in his office. After thinking for a few minutes, Tang Fei said: "Well, I'll go to the Red Star Factory, don't worry."

The Red Star factory also needs to purchase IGBTs, because this kind of thing is not only used in the motor traction system, but also widely used in the entire DJ4 electric locomotive.

Thousands of IBGTs are used in the entire DJ4 electric locomotive.For the Harmony series electric locomotives successfully developed and manufactured in the future, the IBGT used for each locomotive will be as high as tens of thousands.

In future bullet trains and high-speed rails, tens of thousands of IBGTs will be needed for each train.In the future rail transit industry, the demand for this kind of thing is too great.

The current DJ4 electric locomotive costs thousands of yuan per locomotive. With such a large demand, Hongxing Factory should have its own procurement channels.

Tang Fei holds the hope that if Red Star Factory has procurement channels and can import IBGT from abroad at a suitable price, then the IBGT he needs will also be purchased by Red Star Factory. After purchasing, Red Star Factory will give it to Jiuzhou Industrial Co., Ltd.

With this in mind, Tang Fei comforted Zhao Ke, then left his office and drove to the Red Star Factory.

Instead of looking for Xie Zhenhua, let alone Chang Jinlin, Tang Fei went to the procurement center.

If the Red Star Factory imports IBGT, the procurement work must be handled by the procurement center. It is most appropriate to go to the procurement center and ask.

I hope they have a purchasing channel, Tang Fei thought so when he walked into the purchasing center.Walking into the procurement center familiarly, Tang Fei, who was careful, found that there seemed to be something wrong with the atmosphere.

What's the matter, is something wrong?

Tang Fei was full of doubts. He happened to see an acquaintance, which was Yang Jun. Tang Fei caught him and asked, "Director Yang, what's the matter? What happened to your purchasing center?"

Yang Jun sighed and told the truth. It turned out that not long ago, Li Weibin, the vice president in charge of personnel, came to the procurement center in person and announced an appointment.

He was removed from the post of prime minister of the procurement center, saying that he had another appointment.Appoint Chen Guihong to preside over all affairs of the procurement center.

Hearing this, Tang Fei said jokingly: "This is a good thing for Brother Chen, he has been promoted."

Yang Jun sighed, shook his head, didn't say anything else, just said softly: "Mr. Tang, please find our Mr. Chen, he is in the office."

"Okay, I'll go to his office." Tang Fei said, thinking in his mind while walking towards Chen Guihong's office.

What happened to the people in the purchasing center? It's just an ordinary personnel appointment, and they all look like this.In addition, Brother Chen has been promoted from the deputy general manager to the head of the purchasing center, which is a good thing.

Tang Fei couldn't figure it out, so he couldn't help but shook his head mockingly.

What was even more strange was that when he walked into Chen Guihong's office, he found Chen Guihong in a daze with a sad face.

This is not right, Chen Guihong should be happy when he was promoted to general manager!

"Brother Chen." Tang Fei called softly.

Only then did Chen Guihong recover from his wandering thoughts, and when he saw that it was Tang Fei, his complexion improved a little, and he got up and said, "Brother, you are here!"

After finishing speaking, he poured a cup of tea for Tang Fei, and said slowly, "Brother, our procurement center is troubled now, and I am so worried."

Seeing what Chen Guihong said, Tang Fei was puzzled and said, "Brother Chen, what's wrong with you, you should be happy to be promoted to the head of the procurement center, and you should be congratulated."

Chen Guihong smiled wryly.

"Brother, don't you know that this position is not easy to sit in. On the surface, I have been promoted to the head of the procurement center, and I am only one step away from the vice president of the Red Star Factory. I'm sitting on a volcano."

"Oh." Tang Fei looked at Chen Guihong in confusion, waiting for him to continue.

Chen Guihong continued: "My predecessor was suddenly dismissed because there was a problem with the procurement of the IGBTs required by the DJ4 electric locomotive. The IBGTs required by the DJ4 electric locomotive could not be purchased in place and have not been found so far. This will definitely affect the final assembly process of the DJ4. .”

"This matter made Mr. Xie very angry. He reported to Mr. Chang, and Mr. Chang also lost his temper. At the office meeting this morning, several leaders agreed. If such a thing happened, someone needs to Come out and take responsibility, so my predecessor was fired."

what!
After listening to this, Tang Fei's face changed slightly. The Red Star Factory also had problems with the procurement of IGBTs. He still placed his hopes on the Red Star Factory, but now it seems that his hopes have been shattered.

Tang Fei felt anxious for a while!
At this moment, I can fully understand Chen Guihong's mood. He is really sitting on the volcano. If he can't purchase the IGBTs needed for the DJ4 electric locomotive, his position is also dangerous.

Tang Fei said slowly: "Brother Chen, to tell you the truth, the DJ4 traction motor system we are trial-manufacturing also needs multiple models and specifications of IGBTs. We have encountered difficulties in purchasing. I came here this time to ask for help. Unexpectedly, Red Star Factory also encountered difficulties in this regard.”

Chen Guihong didn't speak again for the time being, he seemed to be thinking about something, at least after thinking for a few minutes, he said slowly: "It seems that I can only use the power of my family and ask my family for help."

Suddenly, Tang Fei became curious.

Tang Fei knew that Chen Guihong was from the capital, and he was probably a child of a great family. This was all along, and Chen Guihong had never mentioned his family background, and it was just inconvenient for Tang Fei to ask.

Could it be that this time I can learn about Chen Guihong's family background!

.........

There are three changes today, and the third change is over.

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(End of this chapter)