Inverter Use and Maintenance of Experience

Inverter Use and Maintenance of Experience

Inverter Use and Maintenance of Experience: We are on the maintenance of a large number of converters, it was found that many people in the converter during use, there are many issues to explore with you all here! A）！ A) Inverter for selected brands: Do not look the price, some inverter low price, but the quality, performance, very poor! ！ Its jerry-built, short life, accessories less difficult to repair, if the incumbent, the new circuit board is the maintenance costs would be astronomical; Some companies make a commitment for warranty service, but your inverter may be transported to thousands of miles outside the city, flowers one or two months time to fix, so to purchase converter about the neighborhood when the Department of whether the maintenance services; some converter Though this is the brand name, but it is finicky, there must be a good use of the environment (with air conditioning) makes a good quality; some components of transducer assembly more "exclusive special" hard to buy and the price high, so maintenance costs are also high; poor performance of the inverter Another problem is that when a fire is very serious, almost no maintenance of value; Inverter failure rate is relatively high, so When you purchase your convenience to understand their maintenance, inverter module is common, is it easy to buy; if a large amount of type inverter, it is best to buy more than one or two to reserve; If your inverter is used in a simple speed control, use relatively inexpensive price of the economic series, if the electrical load heavier, often emergency stop, please use a good performance, large capacity, or a converter! B）---) --- Do not mounted in a vibration transducer devices (such as injection molding machine, punching machine, washing machines), because it inside inverter main circuit connection screws easy to loose, there are many converters because of this reason that the damage! C）---C) --- Wiring Problem: The best converter input connected to an air switch, protect current can not be too large, in order to prevent a short circuit when the inverter will not be too severely burned! ！ Especially the most vulnerable of the older generation of electrical bills!！ The line of control Try not to be too long, since it made the control panel susceptible to electromagnetic interference generated misoperation! ！ Also lead to damage control panel！ Do not equipped with a high-current inverter next to the action of the contactor and often！ Because of its interference with frequency converter is very large, often make inverter malfunction (show all kinds of trouble)! Some people sake of convenience, always connected to start the Line of Control (such as the Mitsubishi STF-SD), a transmission frequency converter on the starter motor, so that inverter due to the current flowing through the charging resistor and easily burn charging too much resistance Ground should be well grounded, or severe electrical leakage, ground damage will be charged inverter. D) --- often have to urgently stop the inverter is best not to rely on inverter itself, the brakes, but as an additional brake resistor or a mechanical brake, or inverter motor back-EMF constant impact of the failure rate would be greatly enhanced! E) --- If the inverter current low-speed operation (<15hz),> F) --- dust and moisture are the most lethal killer inverter！ Especially when down a few days later, the dust stuck in the circuit board damp, when power transmission after the inverter circuit board on the most likely ignition damage！ Best to frequency converter is installed in air-conditioned room! 。 Or the installation of dust in a network taking into account the electrical cabinet.！ To regularly clean the circuit board and heat sink on the dust; down converter in power for some time before what is best to use hair dryer blowing circuit board! G）some brands converter when the cooling fan is broken, it will not be given over-temperature protection! Until the converter is damaged! So when the fan should be replaced with the sound! H) --- Some factory supply for generators, voltage instability, frequent damage to inverter Later, regulators or overvoltage protection devices to install generators with good results! I) --- mine is also very important! Although rare, but when the converter is mine to patronize, the heavy damage！ Inverter constant pressure water supply most likely to be struck by lightning, because it has an argument of mine water pipe extending toward the sky! J) --- Inverter interference is also a headache, it will make use of other electronic devices do not function, then inverter input, output, the line of control is best to use shielded cable, shield wiring methods should not be wrong, otherwise the opposite effect , it is possible to trap the re-use iron pipes, installing filters, lowering the carrier frequency! We found that if the inverter switching power supply switch is a FET (such as the K series), then its interference will be bigger! ！ ! K) --- When the inverter is broken beyond repair experience is best not to those who do not repair Otherwise, the more likely he or bad repair (often people call in deeply regret it) Sometimes fast fuse, and be sure to check the module if there are problems, and some are not experienced electrician, immediately loaded onto a good quick melt (absolute can not be used to replace copper wires), the result is a more powerful inverter burned, according to our experience, if the fast Most of the modules fuse problem, but the module is not necessarily a bad quickly melting off! Many inverter power module, rectifier module is to replace each other, and if we have to buy the original model, there may not buy or high prices!

Maintenance of the modules had harmed a lot of people: We are in maintenance converter process, often encounter some factories blow up after his repair of the inverter, and the damage is more serious than the original, more difficult to repair! The inspection reveals that they too are using a maintenance module. Maintenance-off module is difficult to detect with the instruments, the argument completely normal, but because of its internal wiring rough, the transistor can not seal Grease opened sealed! This module can be used, some a few months, some one turn on the blow up Maintenance of the modules had to open then putting it back because it is so closely identified, or can be seen! Use of 502 glue stick to copper, Mo Shangqu rather hard! The original module's plastic smoother, soft!Maintenance-off inside the module due to the Qingdiao silicone grease, so that the module into a hollow, then beat his copper voice is different! It could also be damage to the module apart to see whether the rough wiring. Some pseudo-module is another label, from this model into another model! 把电流小的贴成电流大的！ The current is small, paste into an electric current big! Even paste into the low pressure of high pressure! Label printing technology is now more and more simulation, but as long as a careful comparison with the original look of the module, or can be seen in! ！ !


We repair a lot of elevator use inverter, found that many failures are because of their work environment through high temperature caused by aging components, easy, elevator converter installed in the building of the most top-level control room, often in the summer by the sun exposure, coupled with its own inverter and brake resistor heat, so that electric indoor temperature is very high, the work environment high temperature will shorten the life of electronic components! Converter in this respect more apparent, so when the elevator electrical room in the design of ventilation problems in addition must pay attention to insulation, such as the walls of hollow brick, multi-room roof design, if coupled with air-conditioning, then the president of a lot of the life of converter !！ Installation of electrical inverter cabinets in Xiamen days If you find that their internal temperature is very high, electric door should be open, I have seen many manufacturers of electrical cabinet design is too small Converter can be fitted exactly！ And do not install the cooling fan!


380V/220FU2（600V/1.5A） ------ Lift Inverter Maintenance Example: Today's maintenance of a lift 676GL5-15KW Yaskawa Inverter, initially due to fast melting 380V/220V transformer protection FU2 (600V/1.5A) blew (short-circuit cooling fan cause 380V/220V transformer short-circuit), district management office did not investigate the reason for electricians to use copper instead of FU2 fast melting, electricity board, after copper and around the ignition, Shao Rong copper spray to drive another board, resulting in two 2BI100NC-120 power module and driver board is damaged, 100A also blown melt faster, causing heavy losses.So please electrician note that under no circumstances can be used as a substitute for copper melting fast, otherwise, equipment damage is usually a very tragic and devastating!


Converter routine maintenance on the elevator: Now the lift is used to control the inverter, when the inverter failure would cause inconvenience to many people but also anxious bad management, if there are pairs of normal frequency devices for maintenance, you can greatly reduce the failure rate converter, we maintain a large number of lift inverter, the normal maintenance of summed up a few pay attention to the problem: 1) electric lift chamber temperature can not be too high, otherwise the converter components easily aging, the best air-conditioned, the effect is quite good! 2）2) to prevent rain water wet, usually in a typhoon when the windows and doors were blown into the rain shower bad Ershi converter. 3）Thunder and Lightning, which is linked to an entire building or an entire mine facilities of the district, was struck by lightning in general inverter and badly damaged. 4） Inverter cooling fan to clear dust from time to time and found that there is sound or not to run to be replaced. 5) The elevator motor, there were unusual sound transducer is usually a problem, such as the motor three-phase current imbalance, the best time is necessary to repair, until the converter is completely impossible may be more severely damaged. If he did not do their own maintenance on maintenance experience, many people have made more bad inverter.




- There is a lift maintenance company delivered a wide on the elevator to repair the Inverter Fuji VG5 he has been revised twice, and both spent a few days burning module, suffered heavy losses! Upon inspection, it is because when the thermal plastic latex with wheat in the module's bottom painted a result, burned by poor heat dissipation module. So if there is no experience, do not repair themselves, or may be wasted effort, money and time! Their maintenance has the following risk (often seen): If buy fake modules, drivers, faulty but did not find out, loading the wrong line, did not tighten the screws and so on! All these converters can be burned even worse!





—— 电梯厂家请注意：有的电梯厂家选用了安川制动单元，用了一段时间后发现经常坏制动管，后来经检查后发现是电压档选择问题造成的，安川制动单元要根据实际电 源电压选用电压档（有一短接片短接），分有380V、400V、415V、440V、460V电压档以适用不同国家。 - Elevator manufacturers Please note: Some elevator manufacturers selected Yaskawa braking unit, with a period of time after the discovery was often broken brake pipe, and later through the inspection found to be caused by voltage profile selection, Yaskawa braking unit should be based on the actual voltage power supply voltage selected file (with a short piece then shorted), divided into 380V, 400V, 415V, 440V, 460V voltage profile to apply to different countries. 在国内很多人都是选在380V档，但很多地区的实际电压都在400V以上，这样使制动单元的制动量大很多，制动管长期发热而寿命短，有的用几个月就坏掉，如果厂家一开始就选用400V档（或415V），当电源电压为380V也不影响电梯的使用！ Many of them are in the country chosen 380V files, but many parts of the actual voltages are 400V and above, so that the brake unit to brake much larger amount, the brake pipe and the short life of long-term fever, some with a bad few months out, if manufacturers start a file on the selection of 400V (or 415V), when the power supply voltage is 380V does not affect the use of the elevator!

------现在的假模块很多，下面是2MBI100NC-120模块真假对照图，左边是假的，假模块很难用仪表测出，如果你怀疑你的模块是假的可拆开看看，其接线很粗糙，工作寿命很短。 ------ Now a lot of false modules, the following is true or false 2MBI100NC-120 module control diagram, the left is fake, fake instrument modules are difficult to measure, if you suspect that your module is false can be apart to see of view, the wiring is very rough, working life is very short.
这是深圳一家电梯公司自己在街边购买模块维修变频器，结果把变频器炸到面目全非后才送到我们这里维修的，所以如果没有什么经验就不要自己维修变频器，否则有时会造成重大损害！ This is one of Shenzhen's own elevator maintenance in the street to buy the module inverter, inverter deep-fried to a completely different result that sent us after the repairs, so if there is no experience, do not repair their own converter, or sometimes cause significant damage to !

------三菱PM50RSA120二手模块(模块PM75CSA120、SP50Z6C、SP75Z6C也同样）现在很难找，也可用PM50RHA120代用，它们的最大差别在于前者的上半桥驱动脚是四条针一组，后者是三条针一组。 ------ Mitsubishi PM50RSA120 secondary module (module PM75CSA120, SP50Z6C, SP75Z6C also) is now difficult to find, can also be used PM50RHA120 alternative, their greatest difference is that the former is four feet on the half-bridge driving a group of needles, the latter is a group of three needles. PM50RSA120 四条针一组中第二条针是检测信号输出，与其下半桥驱动最后一个脚（19针）功能重复，很多变频器都没用到这条针的功能，所以用PM50RHA120模块上 半桥驱动的三条针插到PM50RSA120模块上半桥驱动的1、3、4针位置上就可以，当然针脚的位置要摆斜一下。 PM50RSA120 a group of four needles in the second pin is to test the signal output, the next half-bridge driver with the last one foot (19-pin) feature to repeat a lot of inverter no needles used in this function, so the module on the half-bridge driver with the PM50RHA120 The three-pin plug into PM50RSA120 half-bridge driver module on 1,3,4-pin position can, of course, the location of pins to be placed oblique look.


------- 如何学维修变频器:很多人打来电话询问如何学维修变频器,其实学维修变频器不算难,只要你有点电子知识,对变频器原理有点了解,很快可学会维修变频器,但 问题是你想要维修变频器又快又好!你必需有相当多的经验及维修配件!经验要长年积累,也要付出相当大的代价！ ------- How to learn maintenance converter: Many people called asking how to learn maintenance inverter, in fact, maintenance of inverter is not difficult to learn, as long as you have a bit of electronic knowledge and a little understanding of principles of right Converter, soon available Institute of Maintenance converter, but the problem is that you want to maintain rapid and sound converter! you must have considerable experience and maintenance of accessories! experience should be accumulated, but also to pay a high price! 你通常要烧毁很多变频器后才能学到一点刻骨铭心的经验！ You usually have to burn a lot of converters in order to learn a bit after the unforgettable experience! 变 频器牌子多!故障原因千变万化!又没书可查!有时要好长时间才能查出,你要有耐心和信心!最好能到变频器公司泡几年!工资低一点也没关系!维修变频器另一 个问题是配件难找!你自己最好积累一些常用的元件,要会弄清哪些元件可互换,为了降低成本,维修变频器一般用旧模块!但旧模块很多质量都有问题!每次进货 都有大部分模块质量不合格而被退货！ Inverter Multi-brand! Cause of the malfunction ever-changing! Not any books to be investigated! Sometimes taking a long time to find out, you need to have patience and confidence! Preferably to the inverter's bubble a few years! Low wages, that's fine too! Maintenance converter Another problem is hard to find parts! you the best accumulation of some common components, we should find out what components will be interchangeable, in order to reduce costs, maintenance, general inverter module with the old! but the old modules are a lot of quality problems! per the majority of modules have a second purchase of inferior quality have been returned! 所以学会检测变频器模块的好坏也是关键!大部分不合格模块就由于耐压不够（维修过的模块除外），所以你最好能拥有一个耐压表，一个200元左右，电子商场一般有卖！ So learn to detect inverter module is good or bad is also key! Most of the failed module is not enough because of pressure (except for maintenance over the module), so you better be able to have a voltage table, a 200-yuan, the electronic shopping malls are generally Sell! 我们也经常在与大家一起探讨变频器使用及维修问题，这里边有很多我们熟悉的变频器维修高手，因为他们经常在我们这里购买模块。 We also explore with you regularly use and maintenance problems inverter here while there are many we are familiar with the maintenance of the converter master, because they often purchase the module here. 有兴趣你也上去，这里边可学到不少东西！ Are interested in you go up, where margins can be a lot to learn! 维修变频器都要给客户保修，有一定风险！ Converter must repair to the customer warranty, there are certain risks! 有时还要亏本！ Sometimes at a loss! 刚入门的要有心里准备！ Just getting started to have hearts ready!
-------一体化变频器= 一次性变频器：现在有几个品牌的小功率变频器是一体化设计（输出模块、电源、推动电路固封在一起），这样只要模块有一点小故障也难以维修，换模块价格又很高（接近机价），所以只好报废！ ------- Integrated inverter = one-time converter: Now there are several brands of low-power inverter is an integrated design (output module, power supply, solid-sealed together to promote the circuit), so as long as the module has a little Fault is also difficult to maintain, change the module prices will be high (near the machine price), so had to scrap! 在中国，变频器故障率比较高有其很多客观原因，正如有一个变频器生产厂家对我们说过，同一个型号的变频器在中国使用的故障率要比在欧美地区使用的要高很多！ In China, a relatively high failure rate converter has a number of objective reasons, as there is an inverter manufacturers have told us that the same type of inverter failure rate used in China than in Europe and the United States for use of the much higher ! 所以你在购买变频器时，你必须考虑变频器可能很快就会坏的问题！ So you buy converter, you may soon be considered a bad converter problem! 如果你的工厂经常坏变频器，请不要用一次性的变频器！ If your plant often a bad inverter, please do not use a one-time converter! 已有好多工厂后悔不止！ Have been a lot of factory is more than regret!



--------向变频器新手推荐一本书: -------- Novice to the inverter recommend a book:
今天专门去了一下广州购书中心，找找有没有一本最适合变频器新手看的书，最后在十几种关于变频器的书中找到一本是机械工业出版社出版的《SPWM变频调速应用技术》（第2版），本书比较实用，有针对性！ Today, what specifically went to the Guangzhou Book Center, look for there is no one best suited to novice look at the book converter, and finally a dozen books on the inverter is a machine-building industry to find a publishing house "SPWM inverter transfer Speed Application Technology "(2nd edition), this book more practical, targeted! 介绍了变频器的原理、调试、应用。 Introduced the principle of frequency converters, debugging, application. 看了这本书后很多基本知识的问题就不成问题！ After reading this book a lot of basic knowledge of the problem is not a problem!