Two days later, Liu Yong drove Liu Meng to Kundi Company. This time, he didn't see Sister Rongrong at the front desk. He was probably still on vacation. Wu Yiwen was already waiting at the front desk. When he saw Liu Meng, he smiled and greeted him, and standard etiquette for treating big customers.

"Mr. Liu, you are finally here. I've never seen you for the Spring Festival. I've been looking forward to it. Work overtime to make your order first."

Liu Meng smiled, "Please trouble Mr. Wu, let's go and see, is it done now?"

"The first batch has been completed and put it in the warehouse. Let's go here." As he said that, Wu Yiwen led the way into the front and saw a large workshop where many workers were busy.

"Hello, Mr. Wu!" a loud voice shouted.

The few people turned around and saw that it was the security captain Lu Dong who was smiling. Only then did Lu Dong see that the guests Wu Yiwen was accompanied by were Liu Meng and his two brothers. After a little embarrassed on his face, he immediately saluted respectfully and shouted: "Hello, Mr. Liu."

"Captain Lu, hello, I haven't seen you all the Spring Festival, you have gained a lot of weight and your quality of life is good."

"Haha." Lu Dong grinned, revealing a mouthful of white teeth, and several front teeth were exposed outside, which looked quite funny.

"Okay, go busy." Wu Yiwen said, pulling Liu Meng to continue the tour, pointing to a bunch of accessories and saying, "Mr. Liu, look, these are the motors embedded in the rear wheels, all of which are the best materials used. It's okay to use them for ten or eight years."

Liu Meng looked at it and was still very satisfied.

After a walk around, I looked at several accessories in detail. They were all similar to the contract. When the visit was about to be done, Lu Dong took a tray with a few cups of hot coffee. He walked over with a smile and said, "Mr. Wu, Mr. Liu, have a cup of coffee."

Standing aside with a smile on his face, Liu Meng glanced at him, thinking that Lu Dong was quite flexible, no wonder he was only a security captain. He was also a talented person. He waved his hand and said with a smile: "Captain Lu. It's rare that you have this intention and appreciate it, but I really don't like drinking coffee."

Wu Yiwen also smiled and said, "That's right. Mr. Liu likes to drink tea. Xiao Lu, I have to remember it next time I show my diligence, haha."

As he said that, he took a cup of coffee and started drinking it.

Lu Dong nodded and bowed in a striking manner, not annoying at all, it depends on the timing.

"Mr. Wu, my company has not been done yet, so don't ship the goods for the time being. Can you let me take a set back and assemble it first? You also need to debug the internal control circuit." Liu Meng asked when he left the workshop gate.

"What's wrong with this? Come over, that little Lu." Wu Yiwen happened to see Lu Dong retreating aside and waved to him.

"Mr. Wu, do you have any instructions? Just say it." Lu Dong smiled and came over. He was on call for the leader, smiling like spring.

"You go and go and prepare two sets of goods ordered by Mr. Liu. I'll take them away later, hurry up." Wu Yiwen ordered.

After Lu Dong wrote it down, he quickly ran to do it.

"Haha, I'm really troubled Mr. Wu. You'll deduct these two sets when the goods are shipped." Liu Meng was also very polite to Wu Yiwen.

"Mr. Liu is so polite. In terms of business, we are partners and we have met in private. You are my brother. What's this little thing? Let's give these two sets to you." Wu Yiwen's veteran in the business world suddenly brought the distance between him and Liu Meng.

The atmosphere became even more harmonious for a moment. Just like a brother I haven't seen for a long time, when I arrived at the living room, Wu Yiwen personally made a pot of tea. The two of them were drinking tea while chatting.

Liu Yong always sat aside, talking along the way. Liu Meng knew that his brother was so kind that he liked quietness, so he could do it.

At noon, Wu Yiwen wanted to keep Liu Meng and his brothers for dinner. Liu Meng politely refused. After getting the two sets of accessories, he was more anxious to go back to debug the circuit board. Seeing that he was more determined, he was indeed anxious, so Wu Yiwen stopped keeping him.

The back of the car and the trunk were filled, so two sets of electric bicycle accessories were installed. Liu Meng was very happy on the way back. Liu Yong said at this time: "Mengzi, how can we sell our electric bicycles? Do you enter the mall like a bicycle? They still don't accept it, but can you do it at first?"

Liu Meng actually didn't understand this, so he thought about it and replied: "I'm afraid I can only try it according to this method first. After these two sets are done, I will contact you at a few major supermarkets."

When a good product comes out, you must adapt to the market. Liu Meng is very confident about this, mainly because in his impression, the sales of electric bicycles are very popular after they come out. Many manufacturers are competing to imitate and form a considerable market.

After returning home, Sister Xiaoyun had already prepared the meal, which was very delicious. After dinner, Liu Meng was anxious to install the two sets of accessories with his brother.

The circuit control board mailed by Su Ling had arrived yesterday. Liu Meng also called her and asked about the situation in the Bingcheng. Su Ling was very excited and was happy to listen. The two technical mates had already returned and participated in the production of remote-controlled small aircraft.

Liu Meng didn't ask about the sales. He would not interfere with Su Ling. He would not interfere more. He clearly positioned his own goals. In fact, he is not very good at running a business. As long as he masters the core and professionalism of each technology, the trademark is enough.

This will ensure that everything is under control and give full freedom so that everyone can exert their subjective initiative.

After the control board was installed, the battery was still powered. Liu Meng was very excited and prepared to ride an electric bike around the community and let Liu Yong do it. As a result, he called the electric door until the end and the car didn't leave. After Liu Yong got off, he still refused to leave.

Unexpectedly, he was not good at getting off the job. Liu Meng frowned and thought for a while. When he slapped his forehead, it must be that the motor was blocked. Wu Yiwen did use a lot of materials for this batch of motors, and the maximum torque was increased a little, which also led to a large starting current.

This is just like when a car starts. The torque required is the largest, and it must start in one gear. The same is true for the engine of an electric bicycle. When it is stationary, the motor is like a coil, which is equivalent to a short circuit, which will generate a huge current and cause blockage.

Thinking of this, Liu Meng rode up again, like a bicycle, first riding, and then moving the electric door. His speed suddenly increased and he rushed out in a flash. Liu Yong felt relieved when he saw it, he was really afraid that his brother would invest so much money and get a waste.

After a while, Liu Meng turned back and said to Liu Yong with a smile, "Brother, come and try it. It's very fast, you have to ride it like a bicycle first."

Liu Yong tried it all over and nodded with a smile, "Mengzi, this is really labor-saving. It can be used as a bicycle and labor-saving. It's really good."

After personal experience, I also gained confidence in electric bicycles. "As long as it is divided into part of the profits of merchants, they will definitely be willing. We will go there in the afternoon and talk about it."

After the love was successful, Liu Yong began to be very career-oriented, thinking of achieving some results as soon as possible and getting recognition from Liu Xiaoyun's family as soon as possible.

"It's not possible now. When I modify the control algorithm inside, the problem of static startup may be brought out to talk about it." When he thought of it, Liu Meng handed the car to his brother and ran upstairs.

When Su Ling mailed the control board, it included the control chip development equipment. The circuit board itself did not need to be improved. Just recompile the control program and burn it in.

Liu Meng was also anxious. He got the control board, wrote a simple and runnable program and fired it in, which led to the problem of static blockage.

The nature of a technical occult is immediately exposed again. When encountering technical problems, they must be able to solve them quickly and cannot be delayed for a moment.

The battery in an electric bicycle outputs DC, and the motor uses an AC synchronous motor, which requires the control board to convert the self-current current into AC. In fact, there is a function of a frequency converter in it. The control chip realizes the control of the motor through the frequency conversion main circuit.

The problem of motor blockage is very common, it is a problem with a control algorithm. The simplest IP and IPD control algorithms can be implemented, but there are differences in performance.

Liu Meng started to improve, so he naturally was not satisfied with solving the problem, but completely solved the problem. This study was all afternoon, repeatedly simulating the control algorithm, and when it was still, the current gradually increased to achieve the smoothest.

It took only 4 hours to solve the problem perfectly, and at the same time, it also wrote this technology into a patent, and it was a method patent, "a method for starting a static electric bicycle", and its efficiency is not low.

In the process of solving this problem, Liu Meng also thought of the electric energy recovery system he had developed before. In many cases, electric bicycles actually require brakes and braking. If the motor can be converted into a generator during the deceleration process, what will happen?

This is the way the academic master thinks. He learns from one example and is never limited to the present, but is diverted.

When an electric motor becomes a generator, it has the effect of braking on the one hand, and on the other hand, it can also return part of the electric energy to the battery to achieve the purpose of energy saving. It is definitely a key technology in electric bicycles.

The problem is that the braking process is usually uncontrollable, and often accelerates immediately after braking. How can we quickly change the state of the motor and generator quickly?

This problem also stumped Liu Meng for a while. Only then did he realize that there was a reason why many electric vehicle merchants in the past did not consider this issue. The technology was difficult, and it was easy to have safety hazards when considered, which was a bit thankless.

I had no idea for a moment, and rubbed my slightly swollen head, so I had to stop thinking for the time being.

Moreover, Sister Xiaoyun was already shouting that she had finished her meal. Liu Meng stretched out and stood up, feeling relaxed in body and mind. She was really interested in technology. She thought that she would be able to make a great laboratory in the future and focus on developing some electrical products she had dreamed of. She was definitely awesome, just like Iron Man. (To be continued, please search for astronomy, novels are better, updated and faster!
Chapter completed!