Rebirth of the Industrial Tycoon

Six hundred and thirtieth chapters free gift

Brushless motors are not a new invention. As early as the 1950s, American scientists used transistors to replace the brushes of traditional motors. This is the most primitive type of brushless motor.

However, any invention needs to be put into practical application in order to reflect its value.

In the 1950s, there was no motor rotor position detection device, so the brushless motor invented by the Americans had no starting ability at all, and could only be regarded as a model.

This is like the earliest platinum wire lamp, which has no use value at all before the candle has been lit for a long time. Later, Edison improved the electric light and made an electric light that can be used for a long time, so people only remember that Edison invented the electric light.

The same goes for brushless motors, an early invention that was considered useless. People will not remember that Americans once invented the most primitive brushless motor.

In the 1960s, the rotor position detection device was invented, and the brushless motor began to enter the application stage.

However, brushless motors still used transistors at that time. Due to the limited capacity of transistors, the capacity of brushless motors was relatively small, which was still unavailable.

After the 1970s, semiconductor devices appeared one after another, and brushless motors really entered the application. At that time, the Japanese,

Apply the brushless motor to the video recorder.

But the Japanese quickly discovered that brushless motors are really not as easy to use as brushed motors. Instead of trying to study brushless motors,

It would be better to upgrade the brushed motor.

As a result, brushless motors have been neglected for more than 20 years. Until the end of the twentieth century,

The brushless motor is still something that grandma doesn't love and uncle doesn't love.

In addition to the longer service life of the brushless motor at that time,

Almost nothing.

The structure of the brushless motor is more complicated than that of the brushed motor, and the cost is higher than that of the brushed motor.

The power is not as large as the brushed motor, the response speed is not as fast as the brushed motor, the braking is unstable, and the vibration is large.

And if it is broken, there is no way to repair it, only to replace the motor.

So when it comes to commercial applications, everyone will naturally use mature brushed motors instead of expensive and poor brushless motors.

By the time of the 21st century, developed countries have been studying traditional brushed motors for decades,

They produce high level,

mature technology,

High-performance high-end motor,

It has always been monopolized by developed countries.

However, China's motor industry has been stuck in the neck by materials.

Therefore, high-end motors cannot be made.

All mechanical equipment related to power,

Materials are always the most difficult problem to solve, and this is China's weakness.

Material research cannot be accomplished overnight, it takes time to accumulate.

For example, if you want to double the hardness of a certain material, you need to increase the hardness by half first.

And if you want to increase the hardness by one-half,

You need to increase the hardness by a quarter first, and so on.

Therefore, the research on materials is through continuous process improvement, and after one experiment, the performance of the material is improved little by little, and finally meets the requirements.

Theoretically, as long as enough time is given, China's material technology will definitely reach the level of developed countries.

But you are making progress, and others are also making progress. Everyone runs forward at the same speed, and the one behind will always fall behind.

If it develops according to normal conditions, China's motor industry will be like the engine industry,

Although continuously developing,

It has always been left behind by European and American countries.

However, brushless motors have given China's motor industry a chance to overtake in a corner.

With the improvement of semiconductor technology and the development of electronic technology, the practical application of brushless motors has become possible.

Especially after the emergence of permanent magnet brushless motors, the performance of brushless motors,

It has surpassed the traditional brushed motor.

In the final analysis, the rise of brushless motors is due to the development of material technology.

At the beginning of the 21st century, many domestic and foreign companies have realized the practical potential of brushless motors and began to improve the existing brushless motors.

The research and development of brushless motors that Li Weidong wants to do is actually to improve the existing brushless motors.

For example, improve the stability of the brushless motor, increase the power of the brushless motor, enhance the control precision of the brushless motor, reduce the noise and stability of the brushless motor, and so on.

As for the service life and power consumption, don't worry, this is the advantage of the brushless motor.

There is no carbon brush in the brushless motor, and the only place that will be worn is the main shaft, so in theory, there is no need to worry about wear and tear. Since the parts will not be worn, the service life will naturally be greatly increased.

This is also an important reason why China was able to overtake the scimitar in the field of brushless motors. With the material technology in China at that time, wear-resistant materials could not be produced, so the failure rate of domestic motors was high and the service life was short.

The non-printed motor does not need to experience friction, so it does not need wear-resistant materials, which just makes up for China's shortcomings in wear-resistant materials. Therefore, the performance of domestic brushless motors is no worse than foreign ones.

When it comes to the improvement of brushless motors, one has to mention a legendary death row prisoner.

This person, Li Hongtao, was born in the mid-1960s. He was smart and eager to learn since he was a child. He won the second prize in the National Mathematical Olympiad at the age of fifteen.

You must know that the college entrance examination had just resumed at that time,

Many people who are going to take the college entrance examination still can't figure out the function. Li Hongtao, a junior high school student,

Being able to play Mathematical Olympiad shows that he is quite talented.

Later, Li Hongtao was admitted to the Electronics Department of Zhejiang University. In the mid-1980s, being admitted to Zhejiang University was definitely a dragon and a phoenix among people.

After graduating from university, Li Hongtao was assigned to work in a state-owned enterprise. However, he was not willing to stay in a state-owned enterprise for the rest of his life, so he chose to start his own business in the early 1990s.

However, starting a business requires funds. How could Li Hongtao, who had worked for a few years at that time, have the money to start a business?

So he tried his best to forge the seals and documents of state-owned enterprises, and withdrew cash from the bank. Then he was taken to prison.

When other criminals were caught, they must have panicked. However, Li Hongtao calmly remembered the structure of the police station, found an opportunity to escape from the police station, and embarked on the road of fugitives.

This guy is indeed a talent. He needed a car when he fled. He memorized the structure of the car key just by looking at the Audi car key a few more times, and then copied the same car key to drive the Audi car away. up.

However, the policeman is not just for nothing. Li Hongtao was quickly arrested again, and this time he was sent to a detention center.

But this guy went into the detention center and still didn't stop. He made some simple tools, played an episode of Shawshank, and escaped from the detention center!

The so-called Skynet is extensive but not leaky, how can one break the law and escape punishment! Li Hongtao was caught again soon.

Originally, he was only guilty of forging documents and fraud, and after a few years of serious reform, he came out, but because of two prison escapes, he was sentenced to death for several crimes.

According to the law, if the death penalty is not executed immediately, the sentence needs to be suspended for two years. During these two years, if the behavior is good, the sentence will be commuted to life imprisonment, and if there is a major meritorious service, the sentence will be commuted to fixed-term imprisonment.

Li Hongtao, who was sentenced to death, finally came to his senses and began to accept reform seriously.

During his sentence, Li Hongtao applied to the prison administrators many times, hoping to obtain some materials for mechanical experiments.

In places like prisons, top students from Zhejiang University are definitely more scarce than giant pandas, and Li Hongtao performed very well in prison, and finally the prison approved Li Hongtao's application.

Ever since, Li Hongtao invented the brushless electric excitation motor in prison, not only applied for a national patent, but also won a national award.

Gu Yu and Li Hongtao applied this technology to brushless motors, which greatly improved the performance of brushless motors.

The brushless electric excitation motor invented by Li Hongtao can make the current pass through the rectifier directly into six points without passing through the brushes and collector rings, and then send it into the motor. This is a very important task for the brushless motor. breakthrough.

Although this brushless electric excitation motor has not been widely used, the design principle of this motor was borrowed by the later permanent magnet motor.

The permanent magnet brushless motors of later generations use permanent magnet materials to provide excitation, which is essentially the same power supply principle as brushless electric excitation motors.

The design of using permanent magnets to provide excitation makes the structure of the motor simpler, which also directly reduces the manufacturing difficulty and production cost of the motor. The originally expensive motor has become the price of cabbage.

As for Li Hongtao, his sentence was gradually reduced because of his many meritorious service performances. After serving his sentence and being released from prison, many companies even invited him to join him in scientific research.

The phone rang, and the caller ID was a long list of phone numbers.

Although Li Weidong couldn't remember such a long series of phone numbers, but looking at the area code in front, he knew that it was his cousin Zhou Rugui who was on the other side.

Hey, cousin, yes, I haven't contacted for a long time, how are uncle and aunt? Li Weidong said.

The two sides greeted each other's parents first, and then began to talk about serious business.

Weidong, this f4 group is so popular right now. Our streets and alleys, even the bathrooms, are covered with posters of them! It's really prescient for you to choose them as spokespersons.

Zhou Rugui paused, then continued: Several TV stations in our area broadcast Meteor Garden in rotation every day, and I heard that the ratings are not low every time it is broadcast.

Even the discs of Meteor Garden are in short supply right now, as long as there are discs of Meteor Garden at roadside vendors, they will be sold out soon. Many people even bought a disc player specifically to watch discs.

Li Weidong knew that Zhou Rugui's disc was a vcd video disc, and the disc player was a vcd player.

After 2000, the rapid development of VCD soon replaced video tapes and became a must-have video playback device for families.

Due to the popularity of VCDs, many small shops specializing in renting VCD discs sprang up at that time. Renting a few VCDs for a few cents at home can kill a night, which is much cheaper than other entertainment activities.

If you get to know the boss well, maybe you can get some extra benefits and rent a few videos exclusive to regular customers.

So Li Weidong asked: Cousin, are these discs you mentioned genuine or pirated?

It's sold at a roadside stall, how can there be a genuine version! Zhou Rugui continued; Anyway, Meteor Garden is broadcast on TV every day, and many people who make pirated discs record it directly from the TV, and then copy it to In the disc. Some discs are produced in a hurry, and the commercials in the middle are not even cut!

So that's the case. Li Weidong continued to ask; Will the clarity of the picture be affected if it is recorded directly from the TV?

Of course there is an impact. The recording and broadcasting is definitely not as clear as the original source, and not only the picture is not as clear as the original, but the sound quality is not as good as the original film. But you can still watch it after a while. Zhou Rugui said .

Hearing this, Li Weidong already had an idea in his mind, and he asked, Cousin, can we buy the original source of Meteor Garden?

It shouldn't be a problem. Zhou Rugui replied.

Okay, you can help me buy a set of original film sources. Li Weidong said.

What do you want that thing for? Do you plan to introduce Meteor Garden to the mainland? Zhou Rugui asked puzzled.

The introduction of Meteor Garden is what the TV station should do. Li Weidong smiled slightly, and continued: What I want to do is to let more people watch this TV series.

After finishing the call with Zhou Rugui, Li Weidong immediately called Zhong Yemao.

Hey, Lao Zhong, do you know anyone who makes pirated VCD discs? Li Weidong asked.

Chairman, it's against the law to make pirated VCDs! Zhong Yemao replied.

Just ask if you know each other? Li Weidong said directly.

I know. Zhong Yemao replied honestly.

I knew, Lao Zhong, that you must have contacts in this area. Li Weidong continued, Is the person you know who makes pirated VCDs a large-scale production?

Look at what you asked, if the production scale is not large, it is impossible for me to know it!

Zhong Yemao lowered his voice, and continued; The one I know is directly produced on the production line. Not only the discs, but the packaging is also very exquisite, no worse than the genuine ones.

Do pirated VCDs and set up a production line? Li Weidong asked a little surprised.

You look down on pirates too! Zhong Yemao replied, The ones with hundreds of recorders are all small workshops. The one I know is worth two million for just one production line. If it is conservatively estimated, he can produce 40,000 to 50,000 pirated VCDs a day.

If you invest two million in a production line, it's better than producing microwave ovens. It's a serious business, so why make pirated VCDs! Li Weidong sighed softly.

My chairman, if he was producing microwave ovens, he would have been sold out by our Puppy Appliances! Zhong Yemao chuckled, and continued, Don't underestimate this pirated VCD, the profit is huge!

Even if a pirated vcd earns 50 cents, if he produces 50,000 copies a day, he can earn 25,000. In 80 days, he can earn 2 million, and he can earn back the cost of the production line! This must be faster than our production of microwave ovens.

It's true, my microwave oven production line can't recover the cost in 80 days. Li Weidong replied.

Zhong Yemao on the phone then asked: Chairman, why are you inquiring about this? Is the movie you invested in pirated? Do you want to find outlets for making pirated VCDs?

I haven't invested in movies recently. Besides, I don't miss the box office loss of the pirated version. Li Weidong paused, and then said: I have the source of a TV series here, and I want to give it to those who make pirated VCDs. .”

Send? Zhong Yemao was a little confused.

Yes, I don't want a penny, it's free! Li Weidong replied.

Cheap ones don't have good ones, and what you give away for free shouldn't be a very exciting TV series, right? I guess even if you give it away for free, those pirates may not be willing to make VCDs, and they are afraid they won't be able to sell it! Zhong Yemao asked.

Li Weidong smiled slightly: Don't worry, this TV series I sent will definitely become popular all over the country once it is broadcast!

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