Bang bang, just when the professors were stunned, there was a sound of applause at the door, it was the two academicians who came back from Huang Jie to listen to Zhang Zheng's new ideas, which was very inspiring. Pen, fun, and www.biquge.info

Qin Ming and Gong Shu walked in, and Qin Ming asked first: "Professor Zhang's idea is very good, dare to ask how much the switching frequency of the inverter can be increased by this new method?"

Zhang Zheng didn't have an accurate calculation, so he thought about it and replied: "It should be no problem to raise it to between 10k and 20k." ”

Gong Shu said: "Since the switching frequency is fixed, only at the resonant current zero-crossing point to switch the switching device, then this is a discrete control mode, not continuous, robustness is bound to be very poor, the voltage fluctuation through the amplification of the transformer will be very obvious, the output voltage fluctuation is too large, which is obviously unrealistic." ”

Seeing the shortcomings of blood for a while, Zhang Zheng's face changed slightly, and he didn't have time to think carefully.

Qin Ming also said: "In addition, your control method is simple to say, but it is actually very complicated, for example, your free resonance will inevitably consume electric energy, how much does it consume? How much voltage can a positive resonant increase, what is the relationship between capacitance and inductance value, when the resonant current gradually increases, does the voltage increased by the electric energy injected in a cycle change? The control strategy needs to consider too many factors, but it is more complicated. ”

The two of them are worthy of being academicians, and they immediately criticized them after listening to them, and their eyes are vicious.

The fatal flaw is completely exposed.

Zhang Zheng's face changed from ecstasy to pale, he didn't expect that the idea he had just opened would be attacked more, and even the two academicians took the lead.

One stone stirred up a thousand waves, and the other professors immediately followed.

"Professor Zhang, the current cross-crossing switching, then the zero-crossing point needs to be monitored, it is almost unrealistic to accurately control the switch action at this point, it takes time to sample, it takes time to transmit to the controller, it takes time to control the algorithm, it takes time to output the signal again, it takes time to drive the switch, and it takes time to output the inverter output voltage, how can so many delays be guaranteed?"

"Professor Zhang, you are a discrete control method, our high-voltage DC generator has a key indicator, there is no overshoot boost to 200kV within 1ms, the control is so rough, not to mention the voltage quality, the overshoot must be very powerful. ”

"That's right, I'm afraid the X-ray tube will be broken directly. ”

"It's a no-brainer. ”

As if a gap had opened in the river embankment, Zhang Zheng was completely unable to parry, retreated in defeat, his hand holding the watercolor pen was trembling, wiped the sweat on his forehead, and said with his face: "Colleagues, I just put forward an idea, welcome everyone to criticize and discuss, and I will consider it again." ”

sighed in my heart, this is indeed an excellent idea, I was dizzy with excitement all of a sudden, I didn't find that there were so many shortcomings, and I jumped out so confidently that I could solve the problem, what a shame.

Zhang Zheng's new plan was criticized as decent, and the big guy's heart was put down all of a sudden, and if he couldn't do it, he couldn't do it, and it was discordant for one person to come up.

was still discussing, Zhang Zheng sat there in shame, and didn't dare to raise his head.

At this moment, he remembered who drew this waveform diagram? It could not be the professors here, the people who could draw this diagram must know very well about the control strategy of this topology, who is it, he was curious, this place is extremely remote, except for the professors here, no one can get in, and it is impossible for anyone to have such a deep understanding.

It's really weird, and I can't wait to find out right away.

The professors criticized and asked all kinds of questions, but unfortunately the people who could answer them were not present, otherwise they would have to be refuted.

There are always more solutions than problems, depending on how well you have researched.

Liu Chen didn't expect that a picture he drew casually made Zhang Zheng be criticized again, and he fell from the clouds of excitement to the trough.

The three of them returned to the ranch, Wu Ze was already waiting, and hurriedly told Liu Chen that the backpack thief had some eyebrows, and he would definitely be able to detect it in a few days, he patted his chest and promised that he would definitely recover it a lot, and asked Liu Chen how well he learned to ride a horse.

Liu Chen told the truth, he had just grasped some tricks, but he was not proficient yet.

The rough man slapped his face and said with a smile: "It's okay, brother, you can practice horseback riding in the ranch with peace of mind, just give this food, give this accommodation, don't have any psychological burden, old Nuoduo and I are like brothers, hehe, I can't take care of you even as a big man." ”

"Don't worry, Brother Wu, I'm very good here, you can accompany your sister-in-law and children more, now they need your care. ”

"Good brother, I don't have to say it. ”

Wu Ze laughed, completely informal, and grunted a few words to Nuo Min and Nuo Da, Nuo Min smiled and nodded, and muttered a few words, to the effect: "Uncle Wu, how can you have such a timid brother, the horse can't be ridden well, don't worry, our family will take care of him like a relative." ”

"Haha, little Nuomin, it is precisely because he can't ride well that you have to teach him well, he is my good brother, your aunt and brother's life-saving benefactor, you must thank you for your patience and teaching, and when they are discharged from the hospital, they will be brought over together to be lively. ”

"Really? The little brother must be very cute, and he should be hugged more when the time comes. Nuo Min said happily, glancing at Liu Chen, he couldn't understand what he could do to save people, anyway, he couldn't look down on this guy, clumsy and timid.

Both of them communicated in Mongolian, and Liu Chen was completely blind and couldn't understand.

Nuoda was excited when he saw Wu Ze, he loved Boke, and muttered: "Uncle Wu, let's wrestle, I haven't been here for a long time, I'm itching all over." ”

Wu Ze smiled: "I see that your kid has itchy skin, go, fall a few times." ”

The two walked to the open grass next to them, and directly opened the formation to confront, Liu Chen watched seriously on the side, Nuo Min didn't dare to be interested in this, and went directly into his small bag to read.

Nuoda is stronger than Wu Ze, rampage like a wild bull, but once Wu Ze's hand touches him, even if he can struggle a few times, he will inevitably be thrown out and suppressed, and he can't move at all, the young man is not convinced, and he has been trying more than a dozen times, and then he has no strength, lying on the grass and panting.

Wu Ze clapped his hands, his face was not red or panting, it looked like he didn't spend much effort, he saw Liu Chen's eyes hot for a while, this kung fu is really amazing, how many times has this Nuoda man of more than two hundred catties been thrown out, even when the goods are thrown, it takes effort.

"Uncle Wu, I still can't beat you. ”

"You kid has enough brute strength, but you still don't have enough skills, but I believe that one day you will be able to beat me. Wu Ze said with a smile, Nuoda's grasp of the timing is still too poor, and I am afraid that the progress in the future will be limited, but young people still need to be encouraged.

He actually didn't think that Liu Chen could learn the real fight, that would have to suffer a lot.

……

[Ask for all kinds of support, brothers, the key is to subscribe, really don't look at the theft, the genuine version is at the starting point, all the chapters of the fat man are only a few dollars, no one has any New Year's money, crying and begging. (To be continued.) )