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Guide to Buy Curtain in Digah House Company

Guide to Buy Curtain in Digah House Company

2021-11-13
Digah Company
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The designing and developing of curtain in Guangzhou House Empire Construction&Furnishing Co.,Ltd requires stringent testing to ensure quality, performance, and longevity. Strict performance standards are set with real-world stimulation during this critical phase. This product is tested against other comparable products on the market. Only those that pass these rigorous tests will go to the marketplace.Digah Company has significantly grown throughout the years to meet the demands of customers. We are very responsive, pay attention to details and are very conscious about building a long-term relationship with customers. Our products are competitive and the quality is at a high level, creating benefits to customers' business. 'My business relationship and cooperation with Digah Company is a great experience.' One of our customers says.We have created an easily accessible way for customers to give feedback through Digah Company. We have our service team standing by for 24 hours, creating a channel for customers to give feedback and making it easier for us to learn what needs improvement. We make sure our customer service team is skilled and engaged to provide the best services.
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Working Principle and Application Analysis of High Power High Frequency Hard Switching PWM Converter
Working Principle and Application Analysis of High Power High Frequency Hard Switching PWM Converter
Authors: Feng Xinghai, sun Hongyu, Guo ChanglinInverter welding technology has experienced nearly a decade of development, gradually replacing the backward power frequency thyristor rectification technology and entering the era of high-frequency conversion. In the process of high frequency conversion technology, it has gone through its primary stage, namely hard switching PWM stage, and entered its second stage, namely soft switching PWM stage in recent years.The topology of hard switching PWM converter is simple. Mature technology, suitable for mass production. Its main chips such as TL494 and UC3525 are relatively stable and reliable, which is the main reason why the hard switching PWM power converter of inverter welding machine is still widely used.The so-called hard switch PWM (pulse width modulation) refers to that the electronic switch is in the working condition of high current or high voltage at the moment of opening and closing in the process of power conversion, so its workpiece has poor reliability, low efficiency and serious electromagnetic interference.The so-called soft switching technology refers to the power conversion technology, which is the technology to achieve zero voltage or current at both ends at the moment when the main switching device is turned off and on. That is, ZVS (zero voltage switch) and ZCS (zero current switch) switching technology often used in terminology. Soft switching PWM power converter technology is a revolutionary development compared with hard switching PWM technology. It does improve the reliability, efficiency and electromagnetic interference (EMI) of power products to a considerable extent. At present, most of the high-power switching power supplies developed by domestic peers use hard switching PWM control mode, and only a few use soft switching PWM. Most of the soft switching PWM adopts phase-shifting control mode. Control chips such as UC3875, UC3879 and ucc3895 are used to reduce the switching stress and switching loss of power devices Thus, the efficiency of the whole machine is improved. However, this soft switch also has many shortcomings and regrets, such as:(1) This soft switching mode of medium and high power phase-shifting control is not full range;(2) Due to the existence of circulating current, the conduction loss of the switch is large, and the light load aging rate is low, especially when the duty cycle is small, the loss is more serious;(3) Parasitic oscillation exists in the output rectifier diode;(4) In order to realize the ZVS of the lagging bridge arm, the inductance must be connected in series in the circuit, which leads to the loss of duty cycle, reduces the output capacity and increases the primary side current rating.Moreover, the phase-shifting control itself has an insurmountable disadvantage, that is, the dead time is not easy to adjust. When the load is heavy, due to the large circulating current, the capacitor connected in parallel on the leading bridge arm tube discharges rapidly, so it is easy to realize zero voltage conduction. However, when the load is light, the capacitor connected in parallel on the leading bridge arm switch tube discharges very slowly, and the switching tube of the leading bridge arm must delay for a long time to realize ZVS conduction.Therefore, we absorb the advantages of traditional hard switching PWM power converter, such as simple topology, less integration points, stability and reliability; At the same time, it absorbs the advantages of phase-shift control soft switching PWM power converter, which is easy to realize ZVS and ZCS; A new high-power full bridge soft switching (FB-ZVZCS) technology is introduced to realize ZVS for super forearm and ZCS for lag arm. Thus, the soft switching (FB-ZVZCS) beyond the range of forearm and lag arm umbrella is realized, which greatly improves the reliability, efficiency and electromagnetic interference (EMI) of big power switching power supply products. The realization proves that this control method is very excellent, which can be said to be a revolution to the traditional hard switching high-power switching power supply.1 full bridge soft switch (FB-ZVZCS) inverter welding machineThe outline diagram of the pulse lemon board of the high-power inverter welder is shown in Figure L. A total of 18 pins are led out of the circuit board. The circuit board is a combination of analog and digital circuits independently developed. This circuit can form the driving pulse required for soft switching.1.1 inverter welding machine control boardThe internal diagram of full bridge soft switch (FB-ZVZCS) control board is shown in Figure 2. The functions of each pin are described below.Pin 1 is connected to the working power supply (UDD = 12V or 15V);Pin 2 is connected to the ground of the working power supply;Pin 3 is the reference power supply (UreF = 5V);Pin 4 is the reverse input of the voltage error amplifier;Pin 5 is the same direction input of the voltage error amplifier;Pin 6 and pin ll are connected to timing capacitor (CT1 = CT2);Pin 7 and pin 12 are connected to timing resistor (RT12 working principle and waveform of inverter welding machineThe waveform diagram is shown in Figure 4. The left arm is the leading bridge arm, the excitation signals of the upper and lower switches are constant frequency and width adjusted pulses, the right arm is the lagging bridge arm, and the excitation signals of the upper and lower switches are constant frequency and width pulses. Next, we will briefly analyze the process of realizing soft switching.2.1 primary state (T1, T2)S1 and S4 are on. At this time, the converter outputs energy to the secondary load. At this time, the working state is the same as that of our usual hard switching PWM.2.2 status 2 (T2, T3)S1 is off and S4 remains on, because there are capacitors (C1 and C3) on S1 and S3 Therefore, when S1 is turned off, the circuit current is not cut off at the same time, but C1 is charged and C3 is discharged through S4, l and t. at this time, the converter continues to output energy to the secondary load. The current at point a reaches point B through resonant inductor L and transformer t. if the energy of inductor L has not been released, the current continues to flow through the body secondary tube of S3, that is, the voltage at both ends of S3 is zero, providing zero voltage turn-on for S3 When S4 is off, the current on S4 has been approximately zero, so S4 is zero current off at this time.2.3 status 3 (T3, T4)At this time, S1, S2 and S4 are in the cut-off state. Due to the leakage inductance LS (very small leakage inductance) of the transformer, there is still some energy in the circuit, causing damping oscillation. Its frequency has nothing to do with the load, but only with the distributed capacitance (C1 and C3) of L, S2 and S4 Concerning, since C1 and C3 are much larger than the distributed capacitance of S2 and S4, this oscillation is only observed at both ends of drain source of S2 and S4, and there is no oscillation at both ends of drain source of S1 and S3. This oscillation will increase the loss of S2 and S4 and has no effect on S1 and S3. In order to reduce the loss on S2 and S4 and meet the opening of S2 and S4 in quasi zero voltage state, only the following conditions need to be met: T3 = T4-T3 = t / 2, t is the oscillation period. If t is too small, the inductance L can be increased. In order to ensure the safe operation of S2 and S4, T3 should be increased appropriately. At this time, l can be increased according to different conditions. C1 and C3 should be smaller when T2 ≥ RC is met. When MOSFET is used for power transistor, C1 and C3 generally obtain 1000 4700pf, and C1 and C3 are generally larger (10 20nf) when IGBT is used for power transistor.After the above three states, the converter completes half a cycle, and the second half cycle is the same.2.4 time setting of status 2 and status 3Whether the design is reasonable is the key to realize soft switching and meet the maximum duty cycle. From the previous work process analysis, it can be seen that if state 2 is set too large, the duty cycle will decrease, the peak current of power tube will increase, and the reverse withstand voltage of secondary rectifier diode will increase, which will increase the loss of power tube and diode and high-frequency noise. Therefore, the duty cycle should be increased as much as possible However, if the design of state 2 is small and C1 and C3 cannot be fully charged and discharged, S1 and S3 cannot realize zero voltage switching, and their loss will increase, which is not allowed. The optimal value of state 3 time is critical. State 3 time is long. Due to high-frequency oscillation, the loss of S2 and S4 will increase, and state 3 time is short, which is easy to cause instantaneous short circuit of S2 and S4. When MOSFET is used for power transistor, state 3 time will increase Generally, it is about 300ns. When the power device adopts IGBT, it is generally larger (300 600ns).3. Setting of driving waveform dead zone and front and rear edges of inverter welding machineThe dead band setting of S1 and S3 and S2 and S4 driving waveforms, and the setting of the relative positions of the front and rear edges of S1 and S4 or S3 and S2 waveforms are shown in Fig. 5.4 ConclusionThe experimental results show that the designed high-power soft switching arc welding inverter not only has small volume, light weight and low production cost, but also has high efficiency and high reliability, and the switching loss of ICBT is greatly reduced. The processability, manufacturability and maintainability of the welding machine have reached a high level.
Superb Custom Aluminium Frame Swinging Grill Doors briefing1
Superb Custom Aluminium Frame Swinging Grill Doors briefing1
To provide high-quality Custom Aluminium Frame Swinging Grill Doors, the state-of-the-art production equipment is adopted by Empery. Our engineers adopt AluminiumFrameandTemperedGlass as its main material. With the effort of excellent designers, Custom Aluminium Frame Swinging Grill Doors has unique style in its shape and appearance. It is manufactured to satisfy the needs of different clients. The latest powder coated aluminium improves the quality of Custom Aluminium Frame Swinging Grill Doors. Thanks to the parameters of high quality, Custom Aluminium Frame Swinging Grill Doors bears the characteristics of key advantages are in strength. The fields of application include villas, residential, offices, hotels. You can count on us for product performance as it has passed ISO. It is guaranteed for year(s). Custom Aluminium Frame Swinging Grill Doors is made available in a varied range of specifications. Want more information of Custom Aluminium Frame Swinging Grill Doors, http://www.digahousing.com/aluminium-door-series is a shortcut for you.Empery is an innovative manufacturer focusing on kitchen cabinets,wardrobes,door and windows manufacturing industry. We have 15 years of experience in the Aluminium Door Series PRODUCT segment. We have been in business trade with many foreign countries like worldwide. We have a very rich product line including Aluminium Door Series PRODUCT. Digah products are always attractive for its fine process and quality. Processed by healthy materials, UV cabinet door panel does no harm to human. UV cabinet door panel is environmental-friendly.The policy of 'Listen and learn from other people.' is strictly observed by us. Contact: http://www.digahousing.com/ We are sincerely in your service.
What Are All of These Girls/Young Women Wearing in This Music Video?
What Are All of These Girls/Young Women Wearing in This Music Video?
What Is This....I Ca not Even1. Why do girls and young women wear high heels when they don't know how to walk in them??????????2. Evolutionists, why do people disapprove of old men dating young women even though it makes evolutionary sense?From an evolutionary perspective, it's harder for the old dudes to go out and slay a wild boar then drag it back to the cave for his mate to skin and cook... than it is for the "young bucks."3. Why do young women look better than someone over 30?Maybe your wife is feeling the same about you4. how many young women would consider adoption if they knew that their child might resent them?Wow. Tish, again, an amazing question and as a bmom I feel you aimed this right at me!! If I had known then what I know now! lol If I had known how much he would change my life and make me WANT to change it for him....if I had known there was a dark side to adoption, I would have parented. I cant regret because I have learned in 41 years that focusing on the past is for those with no future but Things would have been different. They would have. Edit* Oh! and as for me? I dont resent my bmom in the least. I love my life, the life of my children and my friends, my parents, my beautiful boyfriend. If she would aborted me, my amazingly gorgeous smart son wouldnt be here about to turn 14 driving the 8th grade girls crazy. What a horrible loss that would be to the human race!! I dont know what her situation was. I love her..5. Why do the old men out there have a thing for young women?Am 21 and the man i am seeing in 46 we never really thought about the age difference other people always did, that sometime made thing difficult now we laugh and enjoy our time togther as men say you are only as young as the girl your feeling6. Is it safe for pretty young women to take the bus at night?yeah id dress unflattering, give a would ont talk to me' vibe, carry your phone, do not dress sexy7. MEN ANSWER, PLEASE: Do you think it's ok for a married man to flirt with young women and use sexual innuendo?He should not do it if you do not like it8. Where is a nice place to find cheap baggy sweatpants for girls/young women?TARGET or Old Navy their the best usually between $5-109. 40 Conservative Christian men, have you noticed how the USA is producing smoking hot gorgeous young women?Problem: They are all moved over to the Democratic side because republicants are on the wrong side of the contraception and abortion issues. Good news: I am a Democrat and I will look as much as I like. And I am not worried, I've got Jesus trimming the hedges. z10. which do young women prefer in a young man? clean-shaven face, groomed stubble, or beard?shave shave shave11. im a plus size young women and im looking for a hairstyle that would fit my face.?Your best bet is going to a reputable salon and having a stylist advise you. A good salon will always include an advice session with a stylist to determine what cut, style and colour look best on you. It is impossible to make such a determination online. Even with a photo, it would be difficult, because we do not know your hair and cannot feel its texture, level of dryness, etc. Please go to a salon and ask for input. It might help to pick up a few magazines, or to do an online search for ideas, so you can present them with a few options.12. What is the safest neighborhood in NYC for young women to live in?I am sorry but really this is kind of ridiculous. I was born in raised in NYC and i am 13. I walk back and fourth from school everyday. As long as you are careful crossing the street, there really are not any "dangerous" places. Just be careful where you go. I live in Madison Avenue which is very safe, but just a warning: the nicer the neighborhood is, the more expensive it will cost. :)
Steel Door Series factories qualified for exports
Steel Door Series factories qualified for exports
Running an exporting business is a challenge, and it isn't as easy as it may initially appear. In China's market now, the Steel Door Series exporters have been striving to march forward and stand out among those countless competitors. To be a qualified exporter, it first requires the exporter to identify foreign export markets for the products. If targeting the wrong market, exporters won't be able to run the business well. Then, exporting can expose the business to laws and regulations. Moreover, it is necessary for the exporter to analyze the amount of insurance on the export transaction before delivery. Also, deciding which party will be responsible for insurance against loss or damage while the goods are in transit during the communication matters a lot. Among those exporters, Guangzhou House Empery Co.,Ltd is one of the qualified exporters who have a clear understanding of the export standard and regulations. The needs for aluminium door from our customers keeps going up year by year in DIGAH. aluminium door series manufactured by DIGAH include multiple types. And the products shown below belong to this type. This product is anti-wrinkle as well as anti-fade. Its bright colors are designed exclusively for not fading with washings. DIGAH: Enjoy spending time at home. People find that this product is extremely flexible and durable, making it ideal for many applications such as car manufacturing. Enjoy every moment of your life!We look forward to sincere cooperation with friends from all walks of life to create the solid wood doors industry's first brand. Please contact.
Linux Backup Utility for Incremental Backups
Linux Backup Utility for Incremental Backups
And why are you not considering git itself? The strategy you describe, after one full and two incremental backups, has it's complications when you continue. It is easy to make mistakes, and it can get very inefficient, depending on the changes. There would have to be a kind of rotation, ie from time to time you make a new full backup - and then do you want to keep the old one or not?Given a working dir "testdir" containing some project (files, and subdirs), git makes by default a hidden . git subdir for the data. That would be for the local, additional version control features. For backup, you can archive/copy it away to a medium or clone it via network. The revision control you get (without asking for) is a side effect of git's differential storage. You can leave out all the forking/branching and so on. This means you have one branch called "master". Before you can commit (actually write to the git archive/repo), you have to configure a minimal user for the config file. Then you should first learn and test in a subdir (maybe tmpfs). Git is just as tricky as tar, sometimes.Anyway, as a comment says: backing up is easy, hard part is the restoring.Disadvantages of git would be just the small overhead/overkill. Advantages are: git tracks content and file names. It only saves what is necessary, based on a diff (for text files at least).I have 3 files in a dir. After git init, git add . and git commit I have a 260K .git dir.Then I cp -r .git /tmp/abpic.git (a good place to save a backup:). I rm the 154K jpg, and also change one text file. I also rm -r . git. Before restoring the files I can get the precise differences:Here I want to follow the git restore hint.After git --git-dir=/tmp/abpic.git/ restore *:The jpeg is back, and text file btext has not been updated (keeps timestamp). The modifications in atext are overwritten. To reunite the repo and the (working) dir you can just copy it back. The files in the current dir are identical to the .git archive (after the restore). New changes will be displayed and can be added and committed, without any planning. You only have to store it to another medium, for backup purposes. After a file is modified, you can use status or diff:And just like git knows about "more" in file 'btext', it will also only store that line incrementally. After git add . (or git add btext) the status command switches from red to green and the commit gives you the info. And you can really get at the contents, somehow:And then the first 4 hex hash digits To travel back in time by one commit it is:btext's blob has a different hash before the last commit, the others have the same.An overview would be: Instead of manually timestamped tar files you have commits with a message and date (and an author). Logically attached to these commits are the file lists and contents. Simple git is 20% more complicated than tar, but you get decisive 50% more functionality from it. I wanted to make OP's third change: change a file plus two new 'picture' files. I did, but now I have:So what did that Your Name Guy do exactly, in his two commits, shortly before 6 pm?The last commit's details are:And to check the second-to-last commit, whose message announces two pictures:This happened because I tried git commit -a to shortcut git add . , and the two files were new (untracked). It showed in red with git status, but as I say git is not less tricky than tar, or unix."Your debutante just knows what you need, but I know what you want" (or the other way round. Point is it's not always the same)1. How to fix Time Machine's "This backup is too large for the backup disk”?This happened to me recently; I was pretty annoyed because I expected that if there was not enough space, Time Machine should just delete the oldest backup.The problem turned out to be that the disk contained only one (large) backup, and did not have room to store the current delta (delta = changes to files since last backup).I realized this when I looked at the disk contents and saw that there was only one backup folder under Backups.backupdb. I used Disk Inventory X to look at the contents of my hard disk, and identified a few large folders which did not need to be backed up. I excluded these from the backup using "Time Machine" > "Options" > "Exclude these items from backups". The info from Disk Inventory X also led me to delete a bunch of large unused files.After the two changes listed above, the backup proceeded successfully. I did not have to launch the backup, it automatically retried. I presume that my changes brought the delta to a small enough size that it fit in the remaining free space on the backup disk.UPDATE: This happened to me again recently, and just excluding folders from the backup was not enough, so I found another trick. Let's say you analyze your hard disk contents and realize there's a 20GB folder (let's call it UselessStuff) which was being backed up. You exclude it from the backup as described above, but that does not delete the previous backups of UselessStuff from the disk, and you still do not have enough space for the backup to complete. Since you do not need any backups of UselessStuff, you can enter Time Machine, right click on UselessStuff, and click "Delete all backups...". In my case, this freed up enough space to let the backup continue successfully.2. Backup large files in an external diskAddonics manufactures a range of HDD duplicators that duplicates hard disks very fast without any connected computers. From naked disks, their solutions also support USB-to-USB copy, etc. Do check it out.We have one in the office, limited application, but it is the most frictionless way to duplicate large files (in fact, the whole disk) to another.3. MSSQL Backup QuestionThere are two ways people backup databases. One is to do dump of the database (i am not a dba so i am not sure the mechanics of doing the dump) to a text file, then write that file to tape. The second is to use an agent that is aware of the RDBMS that you are using. Both of these methods will get you everything you need to restore the DB to a working condition. You can use backup exec, but you will need to make sure that the MSSQL Agent is installed on those systems. Since you have more that 250 server's i am guessing you have at least one dba on staff - I would ask them as to how backups of the SQL servers are currently being done. They should know some of the basics at least enough to get you started. They would know things like whether your predecessor used an agent, or backed up text dumps
Huawei Is in Early Negotiations to Sell Its High-end Smartphone P and Mate Series Businesses
Huawei Is in Early Negotiations to Sell Its High-end Smartphone P and Mate Series Businesses
On January 25, Reuters released an exclusive news that two sources disclosed that Huawei was conducting initial negotiations on the sale of its high-end smartphone P and mate series businesses. In this regard, Huawei responded on the afternoon of the 25th that Huawei has no plan to sell its mobile phone business and will adhere to building a world leading high-end smartphone brand.Reuters said that Huawei is currently in talks with a consortium led by an investment company supported by the Shanghai municipal government to conduct initial negotiations on the sale of its high-end smartphone brands P and mate series. The talks between the two sides have lasted for several months, but the contents of the discussions are confidential.It is reported that Huawei is discussing the stripping of mobile phones. The target is its Shanghai terminal related departments. The R & D of Huawei's high-end series mate and P is mainly located in Shanghai. It is reported that in addition to mobile phones, tablets and other products will also be sold together, leaving only Hisilicon and base station business.At the same time, some media reported that Huawei is negotiating with a consortium led by enterprises supported by the Shanghai government on the sale of high-end smartphone brands P and mate. The negotiation has lasted for several months and was triggered by insufficient chip supply.In response to this report, Huawei responded on the 25th that Huawei has no plan to sell its mobile phone business at all. Huawei will adhere to building a world leading high-end smartphone brand and strive to provide consumers with excellent product experience and services.It is worth mentioning that Huawei denied the rumors about the glory sale before, but it didn't take long to come true.Due to the regulatory policies of the United States, Huawei could not obtain high-end mobile phone chips, and the development of terminal business was blocked. In order to survive, Huawei had to divest some businesses. On November 17, 2020, Huawei confirmed to sell glory and suppliers took over the offer.At that time, several Huawei supply chain enterprises issued a joint statement that Shenzhen Zhixin new information technology Co., Ltd. had signed an acquisition agreement with Huawei Investment Holding Co., Ltd. to complete the comprehensive acquisition of business assets related to glory brand. After the sale, Huawei no longer holds any shares in new glory.Today, glory is rapidly recovering in the supply chain. Recently, Zhao Ming, CEO of glory Terminal Co., Ltd., said that after the glory official declared independence, almost all supply partners have resumed their supply and have not been restrained. AMD, Intel, Samsung, micron, Qualcomm, Microsoft, MTK (MediaTek) and other suppliers have cooperated.
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