The next thing is to explain the problem of the motor, this is not complicated for people who have learned the basic knowledge of electromagnetic induction, the motor is simply the generator in reverse, Xu Fuyuan and Xia Yunyi have made I don't know how many simple generators, it should not be difficult for them to understand the action principle of the motor.

Zhu Cijiong said directly to the two: "Yi Zhong, Fu Zhai, I once told you that when the loop formed by the metal does the movement of cutting the magnetic inductance line, electricity will be generated in the metal loop, and if the charged metal wire is wound into a coil, it will produce magnetic force, which is the same magnetic force as magnetite, that is to say, electricity and magnetism can coexist. “

Of course they remember this sentence, they have verified it with magnets and wires I don't know how many times, and slowly this sentence has been integrated into their minds and has become a kind of truth, and they don't need to deliberately remember it.

Therefore, when these two people heard this, they nodded reflexively, this does not need to be explained, they already understand.

Zhu Cijiong then picked up the pen again, and said while drawing: "If the charged wire is wound into a coil, it will produce magnetic force, you have already understood, two magnets are repelled by the same pole, and opposite poles attract each other, you also understand, if the energized coil is also regarded as a magnet, then will they also repel and attract?" “

This is for sure, do they all have magnetism, isn't it the same as magnets.

In order to speed up the progress, Zhu Cijiong did not explain the Lorentz force and Lenz's law, because explaining the principle of the motor according to the theory involves the magnetic flux vector, and there is no multiplication and division at this time, and I don't know how troublesome it is to explain, so I just draw them directly and let them make the motor first, and then talk about it, as for the theory, we can slowly study it later.

He drew a simple diagram of the structure of the motor directly on the paper, and then explained: "You think, if there is a magnet in the middle, surrounded by a coil, and the magnetic force generated by the coil keeps changing direction, then the magnet in the middle will rotate?" “

When Xu Fuyuan and Xia Yunyi heard this, they looked at the sketch drawn by Zhu Cijiong, and both nodded affirmatively.

Zhu Cijiong drew a simple three-phase generator drawing, and continued to explain: "To make the magnetic force generated by the coil constantly change direction, when generating electricity, it is necessary to send out a current that constantly changes the direction, and the current emitted by this generator is constantly changing in size and direction. The direction of the three sets of coils is changed in turn, so that the current in the direction of the constant change can be guaranteed, and although the current generated by the three sets of coils is constantly changing, the overall sum time is the same size, so as to ensure the stable operation of the motor. “

This is a bit abstract, because the current and magnetic field are things that cannot be seen, and it is really impossible to fully understand it just by a sketch, Xu Fuyuan and Xia Yunyi both showed thoughtful expressions, neither nodding nor shaking their heads.

Zhu Cijiong did not continue to speak, but began to observe the expressions of the two, and when both of them showed eager expressions, he knew that the two of them had already understood what was on the surface, and if they did more experiments, they would slowly understand the conversion relationship between electricity and magnetism.

Now Zhu Cijiong didn't have time to experiment with them slowly, he directly pointed to the sketch of the motor and continued to explain: "If this middle part wants to produce a uniform and huge rotational force, it will definitely not work with a magnet, you must use a silicon steel sheet with a magnetic force, this I have already asked Chang Gung to develop it, I believe it will be soon, but you can still use a magnet to try it slowly during the experiment, and make a simple model first." “

There are a lot of things instilled in this time, Xu Fuyuan and Xia Yunyi both thought for a while before nodding slowly, seeing that they looked a little reluctant to accept it.

Zhu Cijiong thought for a while, pointed to the drawn wires and said: "There is one last problem, this new generator and motor need to be wound with a lot of coils, and the wires cannot be together, if they are turned on, it is not a coil, but a copper block." If you use the current rubber insulated wire, then, the volume will definitely be scary, so you have to develop a kind of enameled wire, the surface of the wire is only coated with a thin layer of insulation for insulation, the material of this enameled wire, Meng Hou you are responsible for it. “

When Bi Maokang heard this, he hurriedly nodded yes, it is not that there are similar things, but he doesn't know much about using that kind of material, but now the Ministry of Engineering understands this more, and he just needs to organize relevant personnel to try.

Zhu Cijiong also reminded: "If the existing materials are not good, you can develop new materials, such as raw rubber and add a little other things, or look for the sap cut from the tree similar to raw rubber, these can be boldly tried." “

Bi Maokang nodded and arched his hand: "Weichen understands." “

Zhu Cijiong thought about it, and felt that it was almost there, so he waved his hand directly: "Then that's all for today, you go back and experiment more, and you can come to me at any time if you have any progress or problems." “

When everyone heard this, they bowed and retired, and then the Ministry of Industry began a vigorous test campaign, and other things can be ignored first, and the things that the emperor has given must be put in the first place!

To say that the skills of Bi Maokang, Wang Zheng, Song Yingxing and others can be regarded as professionals in later generations, and they are all expert-level in their respective fields, so even if what Zhu Cijiong said has far exceeded the current technical level, it is difficult to stop these demon-level talents.

The fastest progress is Wang Zheng, because the so-called gearbox is only a structural change, in terms of technology, there is nothing new, to put it simply, it is to add a shell to the gear, which is not too simple for Wang Zheng.

After he went back, he personally led people to make wooden molds, and then poured the pig iron, and then took it to the machine tool to process it, and in less than three days, a simple gearbox was made by him.

Zhu Cijiong deliberately went to Wang Gong's factory to take a look, not to mention, it is really a little similar to the gearbox of later generations.

However, the worm gear reducer and planetary reducer behind are not so simple, the worm gear reducer is a little better, as long as a few special tools are grinded, they can always be processed slowly; The planetary reducer is troublesome, and the toothed ring of the inner ring cannot be processed at all with the current machine tool!

Zhu Cijiong flipped through the information in his mind, and drew the sketch of the gear shaping machine to Wang Zheng, and made the gear shaping machine, so that this problem could be solved.

Immediately afterwards, Xu Fuyuan and Xia Yunyi made progress again, they directly made a simple set of generators and motors, like that, it was indeed a bit miserable, and the structure was also abbreviated I don't know how many times, but they actually carried it into the palace like a treasure!

Zhu Cijiong watched their performance with great interest, this set of things is naturally nothing unusual for Zhu Cijiong, but for people in this era, it is simply incredible, because after Xu Fuyuan connected the generator and the motor with wires, Xia Yunyi turned the handle of the hand-cranked generator, and the shaft of the motor rotated, and the faster the generator rotated, the faster the motor shaft rotated.

It seems that they have understood the general principle of action, and Zhu Cijiong has specially explained the relationship between the speed and the number of coil windings, and I believe that the real motor model will be made soon!