Rebirth of the Industrial Tycoon

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

However, any invention needs to be implemented in practical applications to reflect its value.

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

This is like the earliest platinum filament lamp, which was not as long as the candle and had no use value at all. Later, Edison improved the lamp and made a lamp that could be used for a long time, so people only remembered that Edison invented the lamp.

The same is true for brushless motors. In the early days, it was also regarded as a useless invention. 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, the brushless motor still used transistors at that time. Due to the limited capacity of transistors, the capacity of brushless motors was also relatively small, and it was still not enough.

After the 1970s, semiconductor devices appeared one after another, and brushless motors were truly put into use. At that time, the Japanese used brushless motors in video recorders. However, the Japanese soon discovered that brushless motors were really not as good as brushed motors. Instead of spending time studying brushless motors, it would be more cost-effective to upgrade brushed motors. As a result, brushless motors were neglected for more than 20 years. Until the end of the 20th century, brushless motors were still something that grandmas and uncles didn't love. At that time, brushless motors had almost no advantages except for their longer life. The structure of brushless motors is more complicated than that of brushed motors, and the cost is higher than that of brushed motors. The power is not as high as that of brushed motors, the response speed is not as fast as that of brushed motors, the braking is unstable, the vibration is large, and there is no way to repair it when it breaks down, so the only way is 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 21st century, developed countries had been researching traditional brushed motors for decades. Their high-level manufacturing, mature technology, and high-performance high-end motors have always been monopolized by developed countries. China's motor industry, on the other hand, is stuck with materials, and therefore cannot produce high-end motors. For any mechanical equipment related to power, materials are always the most difficult problem to solve, and this is China's weakness. Research on materials cannot be achieved overnight, and 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 half, you need to increase the hardness by a quarter first, and so on. Therefore, research on materials is carried out through continuous process improvement, and after one experiment, the material performance is improved little by little, and finally the requirements are met. In theory, as long as sufficient 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. If everyone runs forward at the same speed, the lagging party will always lag behind. If it develops normally, China's motor industry will be like the engine industry. Although it is constantly 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. 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 various performances of brushless motors have surpassed traditional brushed motors. 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 existing brushless motors. The brushless motor research and development that Li Weidong wants to do is actually to improve the existing brushless motors. For example, improve the stability of brushless motors, increase the power of brushless motors, strengthen the control precision of brushless motors, reduce the noise and stability of brushless motors, etc. As for the service life and power consumption, there is no need to worry, which is the advantage of brushless motors. There are no carbon brushes in the brushless motor. The only part that will be worn is the spindle, so theoretically there is no need to worry about wear. Since the parts will not be worn, the service life will naturally be greatly increased.

This is also an important reason why China can overtake in the field of brushless motors. With China's material technology at that time, it was not possible to produce wear-resistant materials, so the failure rate of domestic motors was high and the service life was short.

Printless motors do not need to experience friction, so wear-resistant materials are not used, which just makes up for China's shortcomings in wear-resistant materials. Therefore, the performance of domestic brushless motors is not worse than that of foreign ones.

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

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

You have to know that in that era, the college entrance examination had just been resumed,

Many people who are going to college are still unable to calculate functions. Li Hongtao, a junior high school student,

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

Later, Li Hongtao was admitted to the Department of Electronics of Zhejiang University. In the mid-1980s, being able to get into Zhejiang University was definitely a good thing among people.

After graduating from college, 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 amid the boom in the early 1990s.

However, starting a business requires capital. How could Li Hongtao, who had only been working for a few years, have the money to start a business?

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

Other criminals must have panicked when they were caught, but Li Hongtao calmly memorized the structure of the police station, found an opportunity to escape from the police station, and embarked on the path of a fugitive from then on.

This guy is indeed a talent. He needed a car when he was escaping. He just looked at an Audi car key a few times and remembered the structure of the car key. Then he made a copy of the same car key and drove away with the Audi car. .

But the police are not just for free. Li Hongtao was soon caught again and this time sent to the detention center.

But this guy entered 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 full of details, how can you escape punishment if you break the law! Li Hongtao was soon caught again.

Originally, he was only guilty of forging documents and committing fraud, and it took him a few years to reform seriously. However, because of his two escapes from prison, he was sentenced to death for several crimes.

According to the law, if the death penalty is not executed immediately, it will be suspended for two years. During these two years, if the person behaves well, the sentence will be commuted to life imprisonment. If there is major meritorious service, the sentence will be commuted to fixed-term imprisonment.

Li Hongtao, who was sentenced to death, finally woke up and began to accept reform seriously.

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

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

Ever since, Li Hongtao invented the brushless electric excitation motor in prison. Not only did he apply for a national patent, but he also won a national award.

Gu Qi and Li Hongtao used this technology in brushless motors, which greatly improved the performance of brushless motors.

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

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

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

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 a bargain.

As for Li Hongtao, his sentence was gradually reduced because of his many meritorious services. After he was released from prison, many companies even invited him to join in scientific research work.

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

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

"Hey, cousin, yes, I haven't contacted you for a long time. Are your uncle and aunt okay?" Li Weidong said.

The two parties first greeted each other's parents before starting to talk about serious matters.

"Weidong, this f4 group is so popular right now. The streets and alleys here, and even the bathrooms, are covered with their posters! You are really prescient in choosing them as your spokesperson."

Zhou Rugui paused for a moment, then continued: "Several of our TV stations here are rotating "Meteor Garden" every day, and I heard that every time it is broadcast, the ratings are not low.

Even the discs of "Meteor Garden" are now in short supply. As long as there are discs of "Meteor Garden" on roadside vendors, they will be quickly sold out. Many people even buy disc players just to watch discs. "

Li Weidong knew that the disc Zhou Rugui mentioned was a VCD video disc, and the disc player was a VCD player.

After 2000, VCD developed rapidly and 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 emerged at that time. For a few cents, you could rent a few VCDs at home and kill a whole night. It was much cheaper than other entertainment activities.

If you get to know the boss well, you might be able to get some extra benefits and rent a few videos that are exclusive to old customers.

So Li Weidong asked: "Cousin, are these discs you are talking about genuine or pirated?"

"How can there be genuine copies sold at roadside stalls!" Zhou Rugui continued; "Anyway, "Meteor Garden" is broadcast on TV every day. Many people who make pirated discs record it directly from the TV and then copy it to On the discs, some discs were made in a hurry and even the commercials were not cut out!”

"So that's it." Li Weidong then asked; "Would it affect the clarity of the picture if it was recorded directly from the TV?"

"Of course it has an impact. The recording and broadcasting are definitely not as clear as the original source. Not only is the picture not as clear as the original, but the sound quality is also not as good as the original film. But make do, you can still watch it." 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 answered.

"Okay, 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 in confusion.

"Introducing "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 see this TV series."

After ending the call with Zhou Rugui, Li Weidong immediately dialed Zhong Yemao's phone number.

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

"Chairman, it is illegal to make pirated VCDs!" Zhong Yemao replied.

"Just asking if you know him?" Li Weidong said directly.

"I know you." Zhong Yemao replied honestly.

"I knew that Lao Zhong, you must have connections in this area." Li Weidong continued: "The person you know who makes pirated VCDs, does the production scale be large?"

"Look at what you're asking, if the production scale is not large, it's impossible for me to know you!"

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

"How about setting up a production line to make pirated VCDs?" Li Weidong asked in surprise.

"You underestimate those who make pirated copies!" Zhong Yemao replied: "Those with hundreds of recorders are all small workshops. The one I know has a production line worth two million. . According to a conservative estimate, he can produce 40,000 to 50,000 pirated VCDs a day.”

"Investing two million in a production line is not as good as producing microwave ovens. After all, it is a serious business. Why make pirated VCDs?" Li Weidong sighed lightly.

"My chairman, if he were to produce microwave ovens, he would have been crushed by our puppy appliances!" Zhong Yemao laughed and continued; "Don't underestimate this pirated VCD, the profits are huge!

Even if he earns 50 cents from a pirated VCD, if he produces 50,000 copies in a day, he can earn 25,000. In 80 days, he can earn 2 million, making back the cost of the production line! This is definitely faster than making money for us to produce microwave ovens. "

"That's right. My microwave oven production line will not recoup its cost in eighty days." Li Weidong replied.

Zhong Yemao on the phone then asked: "Chairman, why are you asking about this? Have the movies you invested in been pirated? Do you want to find out how those who made pirated VCDs vented their anger?"

"I haven't invested in movies recently. Besides, I'm not short of the box office losses from piracy." Li Weidong paused and then said: "I have the source of a TV series here that I want to give to those who make pirated VCDs. ”

"Send it away?" Zhong Yemao was suddenly confused.

"Yes, it doesn't cost a penny, it's free!" Li Weidong replied.

"It's cheap but not good. What you're giving away for free shouldn't be a very exciting TV series, right? I guess even if you give it away for free, those who make pirated copies may not be willing to make it into VCDs. They're 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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