"Lightning will pass through my hand!! Uncle Emperor, can I stop learning......" Bush listened to Hong Tao's explanation, his face immediately became bitter, and he almost knelt on the ground and begged for mercy. Immortals can use electricity as a plaything, where can ordinary people do it, then it won't be burned to ashes directly.

"Who said electricity was going to pass through your hands? I'm telling you how the new craft works, and you can do it without me in the future. Unlucky boy, clench your fists, repeat what I just said, and if you dare to miss a word, I will electrocute you! Hong Tao waved his hand, but he didn't really fight, and it seemed a little difficult for a thirteenth-century young man who didn't even know what electricity was to learn the law of the right hand. But no matter how difficult it is, you have to learn, and if you don't teach others, how can you be lazy.

“…… The little finger is the direction in which the electricity comes from, and the thumb is the direction in which the electricity goes...... "Bush was afraid of being electrocuted, but he was even more afraid of the emperor's uncle, so he trembled and repeated the law of the right hand.

"Look, don't you learn very quickly, you say you're not stupid, your brain is pretty good, why don't you do anything. Go around again, do you remember how many laps you just spared? Bush's performance surprised Hong Tao a little, although he did not understand what an electric current or magnetic field line was, but he retold it completely and almost did not leave anything out. Hong Tao, who originally held the attitude of a dead horse as a live horse doctor, seemed to see a little hope again, and he felt that his apprentice was not too bad.

"Four hundred laps...... Master, why are you going? Bush's brain is indeed very good, and he can remember everything he has said, but he is a little timid, and when he saw Hong Tao standing up and going out, he was a little vague, for fear that Hong Tao would leave and lightning would suddenly come.

"I'll go find something else, right in the yard, and you make four more of the same coils. Ay. I said how old are you both, why do you still listen to the root of the wall! Hong Tao said as he stepped forward to go out, but he didn't expect to push the door and bump into something outside the door. If you look closely, it's Wen Xiaoqi and Wen Si, who are eavesdropping outside the door.

"Hey, hey. We want to see what good things Your Majesty is working on, can you teach us too. Compared with Bush, Wen Xiaoqi and Wen Si are simply faceless and skinless, they were caught by Hong Tao, there was no panic on their faces, and they wanted to enter the house with a hippie smile.

"Go, go, go...... What should I do, this is a forbidden place, if you dare to take one more step inside, I will call the guards! Is your steam engine ready? It's been a long time. I didn't even get a broken machine, and I was embarrassed to learn something else. It just so happens that the two of you are also idle, polish these magnets to the size of gold coins for me, hurry up, I'll use them later." "Hong Tao doesn't talk much nonsense, the people who can enter this big courtyard are all the top technical talents in the empire, so don't worry too much about leaking secrets. At least not for now.

It's better to say less about building a generator by yourself, because you can't tell if you can succeed or not. Electricity is a lot more complicated than anything else. If you can't say a sentence or two, you simply don't say it, which can make you appear more mysterious and unfathomable.

What Hong Tao wants to do is a small hand-cranked generator, to be precise, a disc generator. It is not quite the same as a normal generator, the rotor and stator are not nested on each other, but two discs are buckled together up and down. A gap of two millimeters in the middle is fixed with bearings. The disc as the stator does not rotate, but the disc as the rotor rotates with the bearing as the center of the circle.

The disc of the stator is a round steel plate, which is in the shape of a star with five coils bonded with natural resin, and the two enameled wires protruding from each coil are all linked together in the order of the head joint and the tail joint, which is the output wire of the current.

The disc of the rotor is wooden. Four circular grooves were dug into it, and each groove was inlaid with a polished natural magnet, which was also held in place with natural gum. Between the stator and the rotor is a steel shaft, on which the stator is fixed and connected by a hand-made needle bearing.

Will this be able to generate electricity? Soon, Hong Tao found someone to make a wooden box, fixed the steel shafts of the rotor and stator in the box, used two belts to drive the rotor, and at the other end was a larger wheel, driven by a crank, and the owner of this crank was Bush.

In fact, what Hong Tao made is a simple hand-cranked generator, which produces alternating current, with a voltage of about 30 volts and a power of no more than a few tens of watts. This thing is useless, at best, it can use the output line to make Bush feel the stimulation of Ma Sisi, and he can't do anything, it is completely a big toy of Emperor Hong.

"This is electricity, it's the same as lightning, it's just that for safety reasons, the amount of lightning I draw down is very small, and you will feel numb. If I build a big one and use a waterwheel by the river to carry it around, and these two threads will poke you in the blink of an eye, and your life will be over. ”

After wasting several days of hard work and creating an experiment with no practical value, Hong Tao felt that it would damage his image as a half-immortal, and he was even more afraid that Bush would find it boring and not want to learn, and he would not be able to find a good apprentice with such a strong understanding ability and who could draw inferences in the future, so he quickly added it with his mouth. In an instant, Bush shook more vigorously, sweating profusely and not bothering to wipe it, poking his calf with a thread while shaking, grinning and enjoying the taste of electrotherapy.

Bush is very easy to fool, and he does not despise this new skill that Hong Tao taught him. Not only is it not annoying, but also has a great interest in electricity, it seems that this child is born a research-oriented talent, those abnormal behaviors before, can only show that he is not suitable for those ordinary jobs, really have something he likes, his patience, seriousness far beyond ordinary people.

Hong Tao was not very satisfied, not because he was not satisfied with Bush's performance, but because he was not satisfied with his own work. The power of this hand-cranked generator is too small, it can't do anything, it can't even play electrocution, it's too weak, and it's too inconsistent with his tall image. What to do? Can you still increase the power of the generator?

After pondering for a long time, Hong Tao came to a conclusion. If you want to use electricity for production and life, you must have a strong permanent magnet, otherwise the power will not be able to increase at all. Strong permanent magnets must not be produced, so is there any other way to replace it?

Yes! The excitation coil can make the copper wire coil have strong and stable magnetic properties. The specific method is to pass direct current into the coil, and the coil becomes a magnet with strong magnetism, and the specific magnetic strength depends on the number of turns wound by the coil. Alternating current is not enough, its electrodes are always fluctuating between the positive and negative poles, and the magnetic field will also fluctuate with it, which is unstable.

The use of excitation coil to make a strong permanent magnet only requires a small amount of direct current, which can replace the strong permanent magnet in the generator. With strong permanent magnets, the power of the generator can be increased and stable. But here comes the problem again, the DC generator also needs a strong permanent magnet to produce a stable current, and it turns around and turns back to the same place.

"Bush, don't shake it yet, the master will teach you to make a bigger generator! You go to Ciqi first, and ask him to take you to the mine, and bring me all the copper alum, and the freight will be credited to my account. His grandmother's, the emperor still needs money to buy something, is there any reason for this! After pondering until dinner, Hong Tao finally came up with a solution, and he thought it was the only feasible way, that is, to build lead-acid batteries to generate direct current.

First, the DC generator is made with a natural magnet as a magnetic pole, and then the sufficient voltage and current are obtained in parallel or series according to different needs to charge the lead-acid battery, and finally the battery pack is used to energize the excitation coil, and then the larger generator is used to generate electricity. This method is a bit of a way to sell assholes and go to the kiln, and the whole thing is a big circle. But it does allow you to start with a small amount of direct current and then get more of it, but the downside is that it's too cumbersome.

In fact, many research inventions are like Hong Tao, which did not have a clear goal at the beginning, but were forced out when researching something. However, Hong Tao is a bit of an exception, he was not forced out when he was studying something, but because he bragged with his daughter-in-law. Anyway, he is also an idler now, the royal fleet is still being rebuilt, the ancients are cloudy, and idlers have a life.

What is Alum? Its scientific name is copper sulfate pentahydrate, which is a blue crystal, which is very common in copper ore, and is an associated ore after the sulfide is oxidized. If you want to get a lead-acid battery, you must first have battery fluid, that is, sulfuric acid. This can be obtained by recondensing the gas produced by calcining alum, alum, and pyrite. There is no alum and pyrite in Jinhewan, but there is a lot of blue alum in the copper mine. They weren't useful before, they were only used as a small dose of Chinese medicine, but now they are useful.

Calcined blue alum and then condensed, does Jinhewan have this technology? There must be, even higher. After nearly a decade of research on the production of crude oil, Imperial Chemical Group has been able to extract several useful substances from it, no longer the original simple mixture of oil and heavy oil, as well as paraffin and asphalt. After multiple layers of condensation at different temperatures, the purity of the mixed oil is gradually improving, and it is approaching real gasoline and diesel.

The heating kettle and condensation tower that decompose crude oil are very similar to the principle of calcining blue alum to obtain acid steam, and only need to replace the heating kettle with a calcining kiln. So Emperor Hong spent another sum of money and asked the craftsmen of the chemical group to get him a small calcining kiln and a small hydraulic condensing tower in an isolation zone at the lowest level of the Milky Way. Then he took a group of slaves and began his chemical journey, still the same old way, he stared at the south bank, and the slaves went to work on the north bank.

The reason why it was chosen in such a remote place is mainly due to the high temperature and toxic gases produced during the production of concentrated sulfuric acid, and there may be some accidents. This place is far away from Jinhe City, and close to the mouth of the Milky Way, once there is any problem, just scatter the girl and run away, love to blow up or not, love is poisonous or not, as soon as the fire burns, the river rushes and everything is gone, at most the loss of slaves and forests. In the thirteenth century, these two things were not money at all, and no one asked for them.

(To be continued.) )