Minsheng Securities Co., Ltd
About New Hua Du Supercenter Co.Ltd(002264) Special Electric Co., Ltd
Initial public offering and listing on GEM
Listing recommendation
Sponsor (lead underwriter)
No. 8, Puming Road, China (Shanghai) pilot Free Trade Zone
catalogue
catalogue 2 declare that three
1、 Basic information of the issuer four
2、 The issuer's current offering eleven
3、 Information about the project team of this securities issuance IV. is there any situation that may affect the recommendation institution and its recommendation representative to perform the recommendation duties fairly
Description of thirteen
5、 Matters that the recommendation institution should promise in accordance with relevant provisions thirteen
6、 The decision-making procedures performed by the Issuer on this securities issuance VII. The recommendation institution's opinions on whether the issuer meets the listing requirements of the registration measures and the Listing Rules
Itemized description of conditions sixteen
8、 The work arrangement of the sponsor during the continuous supervision of the company eighteen
9、 Recommendation conclusion of the sponsor on this offering twenty
Statement
Shenzhen Stock Exchange:
Minsheng Securities Co., Ltd. (hereinafter referred to as "the sponsor", "the sponsor" and "Minsheng securities") is entrusted by New Hua Du Supercenter Co.Ltd(002264) Special Electric Co., Ltd. (hereinafter referred to as "the issuer", "the company" and "Xinte electric") to act as the sponsor of its initial public offering and listing on the gem (hereinafter referred to as "this offering").
The recommendation institution and relevant recommendation representatives have been in accordance with the company law of the people's Republic of China (hereinafter referred to as the "company law"), the securities law of the people's Republic of China (hereinafter referred to as the "Securities Law") and the law on the administration of the registration of initial public offerings on the gem (for Trial Implementation) (hereinafter referred to as the "Registration Measures") The Shenzhen Stock Exchange GEM Listing Rules (hereinafter referred to as the "Listing Rules") and other laws and regulations, as well as the relevant provisions of the China Securities Regulatory Commission (hereinafter referred to as the "CSRC") and Shenzhen Stock Exchange, are honest, trustworthy, diligent and responsible, issue the listing recommendation letter in strict accordance with the business rules and industry self-discipline norms formulated according to law, and ensure that the documents issued are true, accurate and complete.
Unless otherwise specified in this listing recommendation, relevant terms have the same meaning as in the prospectus of New Hua Du Supercenter Co.Ltd(002264) Special Electric Co., Ltd. for initial public offering and listing on GEM.
1、 Basic information of the issuer
(I) overview of the issuer
Company name New Hua Du Supercenter Co.Ltd(002264) Special Electric Co., Ltd
English Name: newonderspecial Electric Co., Ltd
Registered capital: 185707370 yuan
Legal representative: Tan Yong
Date of establishment of the company: June 26, 2001
Overall change establishment date: May 20, 2010
Registered address: a801, 8th floor, building 2, courtyard 1, lizezhong 1st Road, Chaoyang District, Beijing
No. 269, Haiyou street, Yanjiao Economic Development Zone, Sanhe City, Hebei Province, No. 50, Rongxing North 3rd Street, Beijing Economic and Technological Development Zone (the address is Beijing Xinte plant, a wholly-owned subsidiary of the company, which has been gradually put into use since the first half of 2021)
Postal Code: 065201100176
Tel: (010) 84782560 ext 8888 / 8802
Fax No. (010) 84782181
Internet website: www.xinhuadu.com com. cn.
E-mail [email protected].
Office of the board of directors in charge of information disclosure and investor relations, Secretary of the board of directors Duan Tingting, (010) 85577061
Department, person in charge and contact number
(II) main business
The issuer is a leading manufacturer of domestic brand frequency conversion transformers. Its main business is the R & D, production and sales of various special transformers and reactors with frequency conversion transformers as the core and the sales of supporting products.
The issuer is a pioneer in the localization of frequency conversion transformer. It has developed and produced the first domestic frequency conversion transformer, breaking the monopoly of foreign brands and realizing import substitution. Up to now, the issuer has made a number of innovations in product design and business model, took the lead in realizing the informatization, automation and intelligent upgrading of the whole process from product design, manufacturing to delivery, and became a leading domestic frequency conversion transformer manufacturer and technical service provider. With technology orientation as the core, the issuer has been a high-tech enterprise since 2008, and participated in the drafting of the revision of China's frequency conversion transformer industry standards and a number of national standards related to products. While its rapid development, the issuer actively promoted the progress of the industry and led the technological innovation of the industry.
(III) core technology
The issuer has established its own characteristic R & D and technological innovation system, and has a series of core technologies related to various special transformer products and reactor products with independent intellectual property rights and frequency conversion transformer as the core. The relevant technical ownership is clear, the technical level is China's leading, mature and widely used in the mass production of the issuer's products, and has achieved good business performance and market reputation.
The issuer's core technology covers the whole product design, structure and manufacturing process, including new heat dissipation technology, impedance balance technology, intelligent design and production related technology, core related manufacturing technology, coil manufacturing technology and new structure and design technology. The details are as follows:
Serial number technology name acquisition technology introduction
mode
Compared with the traditional plane core structure, the three-dimensional triangle core structure significantly reduces the no-load loss, the independent load current and noise of the empty winding core, and improves the energy efficiency grade of the transformer.
Due to the three-phase symmetrical structure of three-dimensional triangle 1 device design and manufacture, the three-phase performance of the transformer is completely consistent. Compared with the planar core phase manufacturing technology, it can reduce the material waste of silicon steel sheet by 5% - 6%, increase the effective cross-sectional area of the core, and save the amount of coil conductor by 2% - 3%.
2. The independent technical advantages of three-dimensional wound core are the same as those of three-dimensional triangular transformer. At the same time, due to the three-phase symmetrical structure, the three-phase inductance imbalance problem existing in the research and development of reactor technology and plane core structure can be avoided.
Based on the magnetic flux controlled controllable reactor, which fully combines the dual system and PWM advantages of magnetic flux control technology and PWM control technology, the control loop is completely electrically isolated from the main loop, the regulation response speed is fast, the combination of regulation and control, the independent section range is wide, more energy-saving, higher efficiency, lower harmonic pollution, and higher system reliability. It can effectively reduce the calorific value and noise and reduce the harmonic pollution to the power grid. The design and combination of various sensors and communication networks can be applied to more occasions requiring the realization of complex control power manufacturing technology, especially in various fields requiring remote, intelligent, fast and continuously adjustable reactance.
An increased yoke type three-dimensional / plane winding core is spliced through 3 or 5 single frames. The cross-sectional area of the iron yoke is half of the cross-sectional area of the iron three-dimensional / plane core column. During the operation of the transformer, the magnetic density of the iron yoke will increase a lot. The outsourcing design of 4-coil core increases the loss of the transformer core. Through this technology, the cross-sectional area of iron yoke is increased, the magnetic density of iron yoke is reduced, and the no-load loss is reduced, so as to reduce the cross-sectional area of core column, reduce the consumption of core and conductor, and reduce the overall cost of transformer.
The high-precision dynamic and static constant tension control system realizes the function of free take-up and take-off under constant tension in the process of wire processing and coil winding. In the process of wire processing, 5 a constant tension autonomous control system is used to realize the automatic adjustment of the equipment, which is unattended, and can ensure that the wire is free of deformation and closely arranged under the research and development of constant tension paying off technology; In the process of coil winding, constant tension control can ensure the uniform tightness of each position of the coil and avoid the performance deviation of the coil in the traditional way.
The heat dissipation of the transformer is achieved by setting a special heat dissipation air duct outside the transformer coil, which is connected with the fan on the upper part of the transformer cabinet of the patent technology related to transformer 6, so as to greatly improve the utilization rate of the wind, quickly take away the heat generated by the R & D and operation of the transformer technology, reduce the coil temperature and improve the reliability and service life of the product. The air duct is integrated with the transformer body, which reduces the difficulty of customer assembly.
The impedance balance technology solves the complex lead arrangement and terminal lead out, realizes the half crossing impedance balance of the incoming and outgoing windings of each secondary side of the 36 pulse 7 multi winding resistance independent wave, and solves the problem of unbalanced output voltage of the R & D phase of the three reactance balance technology of the load down converter. The sum deviation of the half crossing impedance is within ± 0.5%; Phase shift splitting technology realizes the isolation between high and low voltage windings, so that the frequency converter can use low voltage
Serial number technology name acquisition technology introduction
mode
Voltage components are connected in series to input high voltage. The precision of phase-shifting angle is high, and the harmonic at the equipment grid side can be controlled within 3%.
The secondary side current of the transformer equipped with high-power frequency converter is large, and the secondary side winding needs multiple wires in parallel. The traditional process will make the transposition between the parallel wires of the high-capacity transformer not complete the whole of the super large capacity, and the length and magnetic leakage of the parallel wires are different, resulting in the formation of circulating current between the parallel wires. 8 the voltage transformation for frequency conversion will lead to the local overheating of the corresponding winding, which will burn the secondary side winding in serious cases. Our company adopts the device design and manufacturing to develop the axial parallel technology of wires, which solves the problem of inconsistent length and magnetic leakage of the connecting wires of each parallel technology of the secondary winding of this kind of transformer in the traditional process, avoids the circulating current between the wires, and eliminates the problem of local overheating of the winding caused by incomplete transposition. It is suitable for 8000 ~ 20000kva high-capacity frequency conversion transformer.
Compared with the traditional manual winding coil, this technology realizes the functions of wire constant tension control, automatic wire arrangement, automatic positioning, etc. at the same time, through the independent interconnection between wireless network equipment and information system 9 automatic winding technology, it realizes the remote transfer of production data, real-time feedback of production progress, remote technology research and development and diagnosis, etc. While the equipment realizes high-speed winding, it also realizes semi-automatic production, which can better ensure the coil production efficiency and quality, and lay the foundation for the automation of winding process.
The intelligent design system independently developed by the company uses a large number of design principles, process standards and modular drawing libraries in the background database to realize automatic electromagnetic calculation by calling or inputting the technical optimization design and independent technical parameters ordered by customers. It can complete a large number of scheme transportation in a short time, 10 automatic drawing system R & D calculation and verify the material consumption, Through the analysis of performance index and cost index, the optimal scheme is quickly selected. Then the data of electromagnetic design scheme is imported into automatic drawing to realize
