Chapter 1009: True sea and air coordination


    Faced with Chang Haonan''s shock, Chang Shan''s reaction was...


    More shocked—


    The former was shocked that someone was preparing to launch an all-electric verification ship so early.


    The latter was shocked at how Chang Haonan seemed to know this stuff very well...


    After the two of them stared at each other for a few seconds, Chang Shan said while thinking:


    “Integrated power system… is a good name and very general.”


    Chang Haonan then realized that at this moment, domestic research on integrated power systems should still be in a relatively early stage.


    So much so that there is a high probability that there is no definite noun to define it.


    My unintentional remark may have led to the birth of this concept.


    ?Of course, in the final analysis, it’s just a name, so it’s not that important.


    ?What Chang Haonan is really concerned about is what he, or his research group, can do—


    It has only been three years since Torch Lab was established, and the first batch of students have not yet graduated. Therefore, there is only revenue but no revenue, and the overall scale is also growing year by year.


    ??As for the LNG ship at the Hudong Plant, it has now passed the initial problem-prone period and entered a relatively stable stage. In most cases, it is enough for several graduate students to take turns to keep an eye on the situation and report it in a timely manner.


    It is equivalent to liberating Liu Fangping and Lei Zhixing.


    Originally, Chang Haonan’s next arrangement was for the two of them to gradually transition to non-contact magnetic bearings and research on permanent magnet fault-tolerant power generation systems—


    ?These two people are both from the mechanical industry. It is perfect that they are responsible for sending traditional rotor bearings (and their fellow students in the same major) to the grave.


    The only problem is that Torch Laboratory’s technology accumulation in this area is…relatively limited.


    Chang Haonan has indeed tried to apply a permanent magnet fault-tolerant power generation system on the SeA650 engine, but on the one hand he only verified its feasibility, and actually retained a complete set of mechanical rotor bearings. On the other hand, in addition to the design itself, it was designed by himself and Except for the 606 Institute, most of the core components have been selected from foreign suppliers.


    Even so, as its core power generation equipment, the relatively simple, mature and reliable switched reluctance motor was still chosen.


    To realize the high power density performance of this kind of motor in a wide speed range, it is necessary to establish a large gap to adapt to material thermal expansion and mechanical spacing specification requirements. Therefore, the output performance is poor and the volume is difficult to further compress.


    A more ideal choice is a permanent magnet motor.


    However, let alone Torch Laboratory, even if we look around the world, there are no particularly mature technologies and products.


    ??Germany, the United States, Britain, Russia, and Switzerland each have related models, but they are all experimental equipment, and the reliability and volumetric power density are generally not ideal.


    In addition, as SeA650 is an international cooperation civil aviation engine, the scope of supplier selection can naturally be broadened.


    ?However, most of the projects of the Aerospace Power Group still involve, even specifically for military use. The large amount of bearing support parts requires a stable supply, and it is impossible to count on imports for everything.


    So, no matter from which perspective, you have to find a way to get the permanent magnet motor yourself.


    ? And this opportunity to participate in the research and development of integrated power systems is just like giving me a pillow when I’m drowsy——


    Although there are still hundreds of millions of differences between warship power and aircraft power, when it comes to integrated power systems, one of the key technologies is the permanent magnet propulsion motor.


    Of course, it is impossible for products to be directly moved to Hangfa, but the technologies are always the same.


    Therefore, Chang Haonan simply asked bluntly:


    “I don’t know if it’s convenient for General Manager Changshan to disclose it, but what specific step have you taken so far?”


    “If we are very pressed for time...our laboratory can first send a technician with relevant engineering experience to assist..."


    Chang Shan looked at Chang Haonan, who was suddenly more proactive than himself, and felt a little nervous:


    “It’s not enough to keep up with the progress...”


    He waved his hand:


    “At present, this project is mainly led by Academician Ma. It is the first project he led after being elected as an academician, so it is very stable.”


    Hearing this name, Chang Haonan thought to himself that it was true.


    ??Academician Ma Weiming''s name is definitely well-known even though he had little interaction with the navy in his previous life.


    At the beginning of the century, Academician Ma’s name had not yet become a household name, but he was actually a leading figure in the field of ship power supply systems.


    Being elected as an academician of the Academy of Engineering in 2001 was largely due to the ship power supply system he developed, which won the first prize of the National Science and Technology Progress Award the previous year.


    ?Of course, in the current timeline, Chang Haonan and Ma Weiming have not had direct intersection, and they certainly cannot show that they understand each other too well.


    ?Hence Chang Shan on the opposite side did not notice any clues and just continued calmly:


    “We just completed the feasibility study at the beginning of this year and are still discussing whether to choose a medium-voltage AC solution or a medium-voltage DC solution, so the next step is to conduct a round of ground experiments in Jiangcheng.”


    "After the technical route is determined, you can just send people over... Anyway, these early tasks have little to do with the specific technology research and development, or... Instead, we need to eliminate external influences and see which solution has greater advantages... "


    ?Concerning the choice between DC and AC, Chang Haonan knew from the perspective of hindsight that the correct answer should be the former.


    Furthermore, even based on his own needs, he would definitely choose the former—


    AC technology can continue to use land-based power system equipment. Engineering development only needs to solve problems such as equipment shipping adaptability improvement and full system integration. The engineering implementation is easy, but it requires high speed regulation performance of the prime mover and an increase in system power density and power supply frequency. Limitations make it difficult to compress the volume and weight, and the parallel connection conditions of alternating current generator sets are harsh. It is only suitable for objects that do not have high power density requirements and are powered by the same type of power supply.


    ??If the shipbuilding industry says your thing is too big, it must be really big. Americans have chosen communication technology that seems to be a shortcut out of their confidence in their own technological research and development capabilities.


    Then it creates a bunch of problems.


    Of course, DC systems also have technical difficulties such as high system integration, strong nonlinearity, and tight coupling of electromagnetic characteristics.


    But these parts are concentrated at the power control system level, which happens to be the part that China is good at, and the solution is at least not as difficult as the AC system.


    For a moment, Chang Haonan had the urge to speak out this set of analysis conclusions directly.


    Fortunately, I got it under control in the end.


    Not necessary.


    On the one hand, even if Chang Haonan is now famous, it is impossible for other naval engineering systems to directly change the project plan just because of his words from an outsider.


    On the other hand, China’s technology research and development in the field of integrated power systems has basically never encountered particularly catastrophic setbacks, and there is a giant like Ma Weiming at the helm.


    In this case, allowing them to go through the entire R&D process normally is a necessary condition for accumulation.


    So when the words came to his lips, he changed it to a question:


    “So what Changshan means is that we need Torch Group to complete the fault fusion diagnosis system and install it on the verification ship?”


    “That’s right.”


    Chang Shan nodded:


    “Although integrated power systems are good, all technologies have two sides.”


    "Centralized management and centralized distribution of energy throughout the ship means that system risks affect the whole body. Once the power system fails, it is not only the ship''s electrical system that is affected. In the most serious cases, it may even cause the entire ship to be damaged. The ship is paralyzed!"


    “So, in addition to reducing the failure rate as much as possible on the hardware and setting up enough system redundancy to ensure that there is still a backup after a failure, we also hope to estimate the risk of failure of the entire ship before a failure occurs. , solve the problem in the bud.”


    From this incident, we can see that projects led by big bosses are indeed different.


    The problems are clearly sorted out, the solutions are clear, and there are multiple backups.


    ?Reduce project risks to a minimum.


    ?It is no wonder that China in the previous life was able to catch up from behind in the field of ship electrical systems.


    “Fault fusion diagnosis first requires a sufficient understanding of the electrical design of the entire ship, so I can’t guarantee anything until I see the specific plan.”


    Chang Haonan did not take over everything, but answered very cautiously:


    "So... after you select a specific plan, I hope to send a technical team, or at least a technical representative, to join your project and track the development of this technology verification ship throughout the entire process, instead of just being a provider. Party B of the subsystem.”


    This is equivalent to the exchange conditions proposed by Chang Haonan.


    Chang Shan also understood instantly and pointed at himself:


    “Like when I was in the QC300 project team?”


    “Almost.”


    Chang Haonan replied:


    "I don''t insist on occupying the position of deputy chief engineer...but the people I send there must join your project decision-making level."


    After Chang Shan heard this, he hesitated for a moment:


    “Your request is indeed reasonable, but I am not the project leader, so I cannot agree on behalf of the entire team.”


    “But I will report the situation to Academician Ma. He personally asked me to talk to you about this matter, so I shouldn’t refuse..."


    Since everything has been said to this extent, it is basically equivalent to agreement.


    It’s just that there are some administrative procedures to go through later.


    "Now, we can be regarded as literally having me among you, and you among me."


    ?Chang Haonan joked half-jokingly.


    Chang Shan was stunned when he heard this statement, and then he laughed too—


    703 institutes have now participated in the QC300 project led by the Aerospace Power Group.


    The Torch Group will later send people to join the research and development of integrated power systems hosted by Shipbuilding Industry.


    It belongs to the linkage between sea and air.


    After some joking, Chang Haonan stood up and stretched out his hand towards the other party:


    “Then...wish us happy cooperation in advance?”


    “It’s a pleasure to work with.”


    (End of this chapter)