Monthly Archives: April 2023

From 2012 to 2016, global new energy passenger cars increased from 116,000 vehicles to 751,000 units, maintaining an annual average annual growth rate of 75 % in the past five years.The Chinese market has maintained a high -speed growth from 2014, and the annualized growth rate of more than 200 % from 2014 to 2015. In 2016, despite being cheated and impact, it still maintained a 63 % growth.The growth of the new energy vehicle market is inseparable from the construction of basic charging facilities. How to ensure the safety of electricity in the charging process, especially to prevent leakage current from harmful to life and property, is worthy of attention.

　　

　　The residual current protector (RCD) as a leakage protector (RCD) is widely used in low -voltage power distribution systems to prevent electric shock accidents, electrical equipment leakage and electrical fires.Also in the field of electric vehicle charging, RCD is also widely used as a basic electrical protection device.

　　There are four modes of electric vehicle charging, which is clearly explained in GB / T 18487.1-2015 "Part 1: General Requirement".As soon as the mode is used to connect the charging cable, the electric vehicle is connected to the AC grid. The remaining current protection depends mainly on the remaining current protection device (RCD) in the building distribution box. Since all existing building devices are equipped with RCD, this method isIt is very dangerous and has been prohibited; Mode 2 installed the cable control protection device (IC -CPD) on the charging cable, and the IC -CPD has the surplus current detection protection function insideThe AC grid is directly connected, and a control guide device is installed on a dedicated power supply device. Special power supply equipment is the AC charging pile. When Mode 4 connects the electric vehicle to AC power grid or DC power grid, the DC power supply equipment with the control guide function function is used., That is DC charging pile.Here, we mainly discuss the selection of the remaining current protectors in the four charging piles.

　　In GB / T 18487.1-2015, it is required that the remaining current protector of the power supply equipment should be adopted by type A or B, which meets the relevant requirements of GB 14084.2-2008, GB 16916.1-2014 and GB 22794-2008EssenceAs shown in Figure 1, the chart of the control circuit scheme of the charging mode 3 controls the circuit, and the remaining current protector is installed inside the power supply equipment.

　　What is the remaining current protector of Type A or B?my country’s remaining current protection device (RCD) guidance standard GB / Z 6829-2008 (IEC / TR 60755: 2008, MOD) "General Requirements for the remaining current action protector" from the basic structure of the product, the remaining current type, and the deduction Methods and other aspects are divided.According to the remaining current type, RCD can be divided into AC, A, and B.AC -type remaining current protector: For the remaining sine AC current that suddenly applies or slowly rises to ensure the deduction RCD.Type A surplus current protector: Contains the characteristics of AC type and the remaining current of the pulse DC, the pulse DC remains overlay 6mA smooth and the remaining current to ensure the deduction RCD.Type B remaining current protector: contains the protection characteristics of Type A. In addition, it can also communicate with 1000Hz and below sinusoidal surplus current, exchange remaining current superimposed smooth DC current, pulsating DC remain superimposed and smooth remaining current, two or more or moreThe pulsating DC current generated by the phase rectifier circuit, the remaining current of the smooth DC current to ensure the deduction RCD.

　　At present, because the price of B -type RCD is too expensive, most of the domestic AC charging piles are installed inside the internal of the A -type remaining current protector.The figure below shows the internal structure diagram of the exchange charging pile, and the remaining current protection device is used.

　　So can the remaining current protector of the type A meet the leakage protection requirements of the charging pile?Let’s analyze the remaining current types that may be generated during the charging process.

　　As shown in Figure 3, in the process of using the exchange charging pile charging process, the communication charging pile and the vehicle coupling device are connected to the public power grid. If the pile is damaged due to insulation, the leakage current may be generated.In the electric vehicle part, the possible leakage current is mainly from the leakage of the vehicle charger. The general topology of the charger is mainly AC / DC and DC / DC.As shown in the figure below, the main circuit diagram of a common vehicle charger.

　　Part of the AC / DC single -phase input AC electricity is first filtered through EMI, and then the AC electricity of 85-265V is reorganized into a stable output DC 400V voltage under the action of the Boost APFC circuit, and DC input is provided for the rear level.The DC / DC part uses the main bridge LLC main circuit to convert the DC voltage 400V into a acceptable voltage that can be acceptable.When the insulation between the circuit board and the device shell is damaged, the remaining current remaining current may be generated in the rectifier part. In the BOOST APFC circuit, the remaining current with a small ripple coefficient may be generated.Here, the BENDER’s diagram is used to explain the generation and harm of the remaining current of DC.

　　It can be seen that DC leakage may occur among the DC / DC part of the push -pull full bridge converter. The low -voltage power distribution system in my country generally uses TN forms of power. The metal shell of the device is connected with the working zero line. The DC leakage will pass the body and the PE line Feedback on the charging route, it affects the entire system current waveform.Through the simulation of the native circuit, the current waveform of the entire system will change, as shown in the figure below.

　　It can be seen that after a DC leakage occurs at the back end, it will also affect the front circuit. The pulsating DC waveforms after rectification occur, which causes spikes to interfere with the back -end circuit stepped.EssenceOn the other hand, due to the existence of the TN system, this failure will not form a large voltage in the body, which is less harmful to the human body. However, if the ground wire of the system is missing or the PE line is broken, then this part of the voltage will hurt the human body to the human bodyEssenceIn fact, there are problems with the connection of PE lines in many places, especially rural areas, especially in rural areas.The existing A type A RCD can only be interfered by DCCCB current when detecting the pulse DC leakage, and cannot detect DC leakage and disconnect. When the DC leakage is greater than 6mA, the magnetic core will cause the magnetic core to magnetize in advance., Increase the deduction value, so that the type A RCD cannot move normally, so it must be protected with type B RCD!

　　Inside the DC charging pile, the municipal electricity is converted into high -precision DC power to charge the battery through a non -vehicle charger.DC charging pile leakage protection is divided into the AC side and DC side. In theory, the communication side also needs to increase the B -type RCD for protection. The DC side needs to be installed with the DC -to -ground insulation monitoring device to detect the detection of DC positive poles and negative electrode insulation.

　　In the foreseeable future, as new energy vehicles enter millions of households, the charging pile will become an indispensable part of the lives of ordinary people. Therefore, the update of the remaining current protectors in the charging pile is necessary.The electric environment can allow everyone to rest assured to enjoy the convenience brought by new energy vehicles.

　　Magtron’s overall SOC chip overall solution based on IFLUXGATE technology has been digitized for type B leak protection protection. It provides a set of cost -effective B -type leakage solutions for RCCB from the traditional AC / A type / A -type type B technology.It provides better protection for the power safety of charging equipment.

　　【references】

　　[1] Liu Hongli, Ma Zhenglai, Nie Peng.Research and implementation of 4KW electric vehicle vehicle charger.Wuhan University of Technology, School of Automation.

　　[2] GB / T 18487.1-2015 Electric vehicle conduction charging system Part 1: General requirements.

　　[3] General requirements for GB / Z 6829-2008 remaining current action protector.

　　[4] GB 22794-2008 useless and similar useless and current -not -with -current B -shaped current removable current as a circuit breaker (B -type RCCB and type B RCBO).

　　[5] Cai Congchao, Wan Yingfei, Liu Yong, Ruan Shaoqing.Potential electric shock risk analysis and design of DC charging piles.Special Transformer Xinjiang New Energy Co., Ltd., Special Transformer Xi’an Electric Technology Co., Ltd..

　　[6] Liu Jinzheng, Zou Jianhua, Hu Hongyu.The application of the remaining current action protector in the electric vehicle charging system.Electric and energy efficiency management technology.

a coming-of-age product. ""

　　

　　

　　peach and cream cases, calld "my first love."

　　They are solirt.

　　The "Vintage" Vering Has A Drop-Down Door and Two Divided Trays Inside. It RETAILS for $ 25.

　　

　　

　　HURT SAID The First Caboodles Fans Now Have Children or Niecess with the YEY WANT to Share their Caboodles Experiences.

　　The Company Also WANTS to EMPOWER Young Females to "Be Happy and Content with WHO THEY Are." "

　　"You are more than a pretty face and a pretty case," Hurt Said. "Beauty is built on the inside."

　　Walmart, target and kmart.

Keep Up with the Client Requirements and Ensure that they have a strong grip on the market.

　　

　　Storm, but there are still some important points for businesss to keep in mind during this time, and some of them are:

　　Gap BetWeen what the manufactuer would like to do with the current process or technology with the organization. However, it is important to take out time and ensure that you keep up with the trend to make sure that when the demand increases, changes, or is something new, you as a manufacturer are prepared to make the best out of the opportunity. According to market research reports and analysis, the Asia Pacific is known to have the largest share in the global metal stamping industry which is then followed by North America and Europe. The shift of manufacturing of precision metal stamping in Asia Pacific is due to the increased industrialization, the rapidly increasing aviation and automobile industry, massive developments in infrastructure, and a boom in the investments from government and private sectors. However, with the maps shifting and progressing, here are some of the important things that manufacturers should never miss out on:

　　The Global Clientele, The Expectation Will Be to Keep Up with the Constant SUPPLY. This will help manufacturers to keep up with the trends.

　　Technology Will Help You Keep Up with This Requirement and in the Best Books of the Customers As Well.

　　Technology.

Theermoset injecting movening takes plastic and moto various shapes and forms, macking them irreversibly and and are users than usually than theermopLastic moulding.

　　

　　A mored which is heated to temporators of up to 204 Degrees Celsius via a sprue and runner system, where it files the voids and creates they.

　　

　　And curing in the same way.

　　To See The Specific Melting Temperature Ranges of Common Plastic Materials used with this process, see the table below.

　　

　　

　　I Heat ResistTthermoset Plastics Can withstand Elevated Temperatus Because They Will Not Remet — Some as high as 370 degrees celsius, and some as low as way below 0 degerees.

　　T Excellent Load Capacity Lightweight Polymers ofte A Surprising Load-Bearing Capacity, Both in Compression and Shear, EspeCially When Flexible.

　　B Shock Absorbantthermoset Plastics Tend to have significant impact resision and can be shock-absorbing. The final properties of the compound cannot in hardness and flexibil.

　　

　　

　　

　　TheRe Several Different thermoset Inject Materials, and Each Has Slightly Different Applications of the Bonds They Make.

　　Heats up or With OTHER MATERIALS When used as an almost unbreakable adhesive.

　　

　　However, Epoxy TENDS to Be Britten and has been haigher moisture sensitivity level than theermoset injection mateling misss.

　　load-bearing and shock-absorbing, event in a harder form.

　　

　　You ’ll Find Thermoset Polyurethan in Situations Water Immersion Is NECESSARY, Like Water-Based Bearings, BeCAUSE THEY WON’T Seize Due to Swelling From Taking In Water.

　　in the tradingal black telephone.

　　Lightweight with Impressive Tensile and Impact Stringth, The Phenol-FormalDehyde Resin Can Flex and Compress, so it can be used in laminating painting.

　　The Additional Materials Added to the Phenolic Compound Make Different FINISHED PRODUCTS-Including High-Speed Bearings and Balls for Tabletop Games Such as Billiards.

　　

　　As the compounds are available in different durometers (Hardness), some can event maintain flexibility at excerantures, even dough,

　　ManuFactures as you are in a hostal.

　　Explore Our Guide: Common Item Made USISTIC Injection thermosetting MOLD MANUFACTURERS MOULDING

MADISON, WIS.-A Former University of Wisconsin-Madison Chancell Died of Cancer on Feb. 17, The UW System Said on Saturday.

　　

　　Rebecca Blank Was 67 Years Old. She server as uw-madison ’s channel for nine years and focused on improving outcoms and the students.

　　Her Tenure As CHANCELOR LATED from 2013 to 2022. After Leaving in 2022, She Became The President of NorthWestern University.

　　BEFORE She Left, Blank Shared How Found She was of UW-Madison.

　　People in Camp RandAll

　　In partne ideaship with the spring class of 2014, Blank Brusht Commentation Back to CAMP RANDALL.

　　Blank Created New Programs at the University, Including Bucky ’s Tuition Promise, Which Created Paths to UW-Madision for Students Coming Families.

　　She Also Led The All Ways Forward Campaign, Which Created Over 5,000 Scholarships and Raised Funds for 327 New Faculty Funds.

　　Science, BeFore Becoming Provost in 2019. "Early in Her Tenure, She Helped Navigate Difficult Budget Cuts; Late in Her Tenure, The Covid Pandemic.

　　UW-MADISON Also Noted Blank Led the School Through "Multiple Effors to Improve Administrative Efficience," Andvocated "for Incream SUPPORT."

　　

　　Blank Also Oversaw The Development of the School of Computer, Data and Information Science at uw-Madison.

　　

, Stone, ETC.FLAME Resistant available.Flow????Better flow properties during the moulding process to fill intricate partsFood Contact ??Food contact applicationsHigh Temperature????High temperature stability for applications requiring high service temperatureHydrophobe ??Applications requiring an increased resistance to water absorptionLow Density? Low density formulations to reduce weight of partsLow Emission? Formulations with low emission of volatile organic componentsLow Shrink? ? ? ?Parts requiring precise tolerances for mounting of various componentsLow Profile? Parts requiring very precise tolerances for mounting of various componentsLow Pressure? ??Applications requiring moulding at low press tonnageLow Smoke Emission??? Formulations designed to meet low smoke emission requirementsPaintable????Materials adapted to all painting processesPIMC ??Materials adapted to Powder In-Mould Coating processReactive????High reactivity formulations to reduce curing timeScratch Resistance ??Formulations with an enhanced scratch resistanceStrength????Applications requiring high mechanical performanceSurface????Applications requiring excellent surface qualityUnidirectional????High strength materials with unidirectional reinforcement to strengthen especially the fibre directionUV stable????Formulations with an enhanced BMC molding manufacturer UV resistanceOther????Tell us your BMC molding manufacturer required key properties and we will design the specific formulation to meet BMC molding manufacturer them

　　

Step is to look into how we actually design the miss to enter Into a Circular economy for future wind turbines. "

　　

　　

　　

　　The Front of a NEWSPAPER, but that friend take you less than a wek to digest in any type of machinery. ""

　　

　　Systems a/s

　　The portential to process large amounts of Blades.

　　

　　

　　

　　

　　Ireland), Queen & RSquo; S UNIVERSITY BELFAST (Belfast, U.K.), Munster Technological University (Cork, Ireland) and City University of New York (New York, N.Y., U.S.).

　　compared to Other Methods.

　　Photo Credit: Re-Wind Network

　　

　　Original value, and you can & rsquo; T get it back. "He notes that all components built via re-wind and its partners are thorought prior to install.

　　Second live.

　　EOL SOLUTIONS.

　　"

　　PEDESTRIAN and BICYCLE BRIDGES (with Partner GP Renewables Group; Warsaw, Poland). Anmet & rsquo; s first bride was installed in points 2021.

　　

　　The recycling facility. That & rsquo; s the best way to lessen the environmental impact: Lowering the carbon emissions related to transport. "

　　& mdash; Suswind aims to seed a circular support by Analyzing and Accelerating Reachnologies, Sustainable ManicTuring and Materials Development SPECID TOD TOD TOD TOD TOND.

　　Through 2055. In Order to Effectively Find USES for Recycled Blade Materials, Fuller Explains, "We Need To UNDERSTAND What Will Be Available, where it will be and when."

　　T Perhaps Expect, "Fuller Admits." There is no commercially ready party for eol composites in the u.k.k we & rSquo;

　　With WITH WIND BLADE MI properial, "Fuller Explains." We & RSQUO; Re GOING to get as Much Data Out of the Process as we possibly can. "

　　

　　

　　Not likely offset the counts of its recovery, "he says.

　　a Pilot Plant in the u.k. to scale up the technology.

　　"He adds.

　　

　　

　　

　　Explains.

　　That used conCrete by Replacing Rebar with Lightweight Fiberglass Composite Formworks Manufactured from Shredded and Remolded Eol Composites.

　　Wind Blades.

　　, U.S.).

　　Credit: CETEC

　　

　　

　　"", then, "" read to under the use, "to take it from the good,"

　　

　　

　　Found that the Fiberglass/Elium Blades Showed Similar Stiffness and Up to Seven Times The level of structural damping of an epoxy blade.

　　Recycling Technology. "The Product Platform is said to be compatible with a range of cost agents for various reactivity and temporator residence requirements.

　　he says.

　　Several Wind Energy Companies have begun pledging to develop turbine blades that are fully recyclable, and/or manuFactured with Zero Waste.

　　; s Recyclaminine thermoplastic Epoxy as the Resin Matrix.

　　

　　

　　Recyclableblade shown here).

　　RecyclableBlades Also Come at a Higher Cost Premium.

　　

　　Developed as part of the project.

　　Recycling Partners still the way, "BMC Molding Manufacturer Jensen Says.