Masu ba da kayan aikin mai sauya mitar suna tunatar da ku cewa kafin kunna mai sauya mitar, ya kamata ku fara bincika yanayin zafi da zafi na kewaye. Idan zafin jiki ya yi yawa, zai sa mai sauya mitar yayi zafi kuma ya ba da ƙararrawa. A lokuta masu tsanani, kai tsaye zai haifar da lalacewa ga sassan wutar lantarki na mai sauya mitar da gajerun da'irori a cikin kewaye; Yawan zafi a cikin iska na iya haifar da gajeriyar kewayawa kai tsaye a cikin mai sauya mitar. Lokacin da mai sauya mitar ke gudana, ya kamata a mai da hankali kan ko tsarin sanyaya shi na al'ada ne, kamar ko iskar bututun iska yana da santsi ko fanko yana da sauti mara kyau. Gabaɗaya, ana iya shigar da masu jujjuya mitar da matakan kariya mafi girma, kamar waɗanda ke sama da IP20, kai tsaye a buɗe, yayin da waɗanda ke ƙasa da IP20 yakamata a sanya su a cikin majalisa. Sabili da haka, tasirin ɓarkewar zafi na majalisar mai sauya mitar zai shafi aikin sa na yau da kullun.
A cikin kulawar yau da kullun na mai sauya mitar, ya zama dole kuma a bi ƙa'idodi. Idan aka samu matsala kuma mai sauya mitar ya yi tafiya, kar a kunna na’urar ta mitar don gyarawa, domin ko da na’urar ba ta aiki ko kuma wutar lantarki ta yanke, za a iya samun wutar lantarki a kan layin shigar wutar lantarki, DC Terminal, da kuma tashar mota ta mitar na’urar saboda kasancewar capacitors. Bayan cire haɗin maɓalli, wajibi ne a jira 'yan mintuna kaɗan don masu ƙarfin ciki na mai sauya mitar don fitarwa kafin fara aiki. Lokacin da mai sauya mitar ya yi tafiya da tsayawa, nan da nan yi amfani da mitar juriya don gwada rufin motar da mitar ke motsawa, don tantance ko motar ba ta da kyau. Wannan hanya tana da haɗari sosai kuma tana iya haifar da mai sauya mitar cikin sauƙi ya ƙone. Don haka, kafin cire haɗin kebul ɗin tsakanin motar da mai sauya mitar, ba dole ba ne a yi gwajin rufewa akan motar, ko kuma akan kebul ɗin da aka riga an haɗa da mai sauya mitar.
A cikin amfanin yau da kullun, ya kamata a samar da tsarin kulawa mai ma'ana dangane da ainihin yanayin amfani da halayen mai sauya mitar. Bayan kowace zagayowar amfani, ya kamata a tarwatsa mai sauya mitar, a duba, auna, kuma a kiyaye gabaɗaya sau ɗaya don ganowa da magance yuwuwar kurakuran a farkon matakan. Kowane mai sauya mitar yana buƙatar tsaftacewa da kiyaye shi sau ɗaya kowace kwata. A lokacin kulawa, ya kamata a cire ƙura da datti a cikin mai sauya mitar da kuma iskar iska, kuma a goge saman mai sauya mitar mai tsabta; Ya kamata a kiyaye saman mai sauya mitar mai tsabta da haske; Yayin kiyayewa, a hankali bincika mai sauya mitar don ganin ko akwai wuraren dumama ko canza launin a ciki, idan akwai wasu fashe a cikin resistor birking, idan akwai wani faɗaɗawa, ɗigogi, ko ramukan tabbatar da fashewa a cikin ƙarfin lantarki, idan akwai rashin daidaituwa a cikin PCB, kuma idan akwai wuraren dumama ko rawaya. Bayan kiyayewa, sigogi da wayoyi na mai sauya mitar ya kamata a dawo dasu. Bayan kunnawa, ya kamata a fara mai sauya mitar tare da motar kuma a yi aiki da shi a ƙananan mitar 3Hz na kusan minti 1 don tabbatar da aiki na yau da kullun na mai sauya mitar.
1. Kafin kunna mitar mai canzawa
Ya kamata a fara duba yanayin zafi da zafi na kewaye. Yawan zafin jiki na iya haifar da inverter yayi zafi kuma ya kunna ƙararrawa. A cikin lokuta masu tsanani, zai iya haifar da lalacewa kai tsaye zuwa ga lalacewar wutar lantarki na inverter da gajeren da'ira a cikin kewaye; Yawan zafi a cikin iska na iya haifar da gajeriyar kewayawa kai tsaye a cikin mai sauya mitar. Lokacin da mai sauya mitar ke gudana, ya kamata a mai da hankali kan ko tsarin sanyaya na'urar yana aiki, kamar ko iskar bututun iska yana da santsi da kuma ko fanka yana da sauti mara kyau. Gabaɗaya, ana iya shigar da masu jujjuya mitar da matakan kariya mafi girma, kamar waɗanda ke sama da IP20, buɗe kai tsaye, yayin da waɗanda ke ƙasa da IP20 yakamata a sanya su a cikin kabad. Sabili da haka, tasirin zafi na majalisar mai sauya mitar zai shafi aiki na yau da kullun na mai sauya mitar kai tsaye. Nau’in na’urar da ke juyar da mitar, kamar ko fanfunan yana jujjuya su da kyau, ko akwai kura da toshewa a mashigar iskar, dukkansu muhimman al’amura ne da ba za a iya yin watsi da su ba a binciken mu na yau da kullum. Ko injin injin injin lantarki, na'urar wuta, da sauransu sun yi zafi sosai kuma suna da wani wari; Shin akwai wasu kararrakin da ba na al'ada ba daga mai sauya mitar da mota; Ko nuni na yanzu akan faifan mai sauya mitar ya yi girma sosai ko kuma girman canjin na yanzu ya yi girma, kuma ko fitarwar UVW mai hawa uku da na yanzu sun daidaita.
2. Kulawa na yau da kullun
Cire ƙura akai-akai kuma bincika idan an toshe mashigar fan, sannan a tsaftace bututun iska mai sanyaya da ƙurar ciki na tace iska kowane wata.
Ya kamata a gudanar da bincike na yau da kullun sau ɗaya a shekara: bincika ko screws, bolts, da matosai sun sako-sako, da kuma ko akwai ɗan gajeren da'ira a cikin ƙasa da lokaci zuwa juriya na shigarwa da na'urori masu fitarwa. A al'ada, ya kamata ya zama fiye da dubun megaohms. Ko akwai lalata a kan jagora da insulator, kuma idan haka ne, shafa su da tsabta tare da barasa a cikin lokaci. Yi la'akari da kwanciyar hankali na fitarwar wutar lantarki na kowane da'irar a cikin wutar lantarki mai sauyawa, kamar 5V, 12V, 15V, 24V, da dai sauransu. Ko akwai alamun kunnawa a kan lambobin sadarwa na contactor, kuma idan yana da tsanani, maye gurbin shi da sabon mai tuntuɓar samfurin iri ɗaya ko mafi girma fiye da ƙarfin asali; Tabbatar da daidaiton wutar lantarki mai sarrafawa kuma gudanar da gwajin aikin kariya na jeri; Tabbatar da cewa babu rashin daidaituwa a cikin da'irar nunin kariya; Tabbatar da ma'aunin ƙarfin fitarwa na mai sauya mitar lokacin aiki da kansa.
A hankali gudanar da aikin gyare-gyare na yau da kullun akan mai sauya mitar, musamman gami da:
1. A kai a kai ƙura mai jujjuya mitar, tare da mai da hankali kan ma'aikatun gyarawa, majalisar inverter, da majalisar kulawa. Idan ya cancanta, ana iya cire allunan da'ira a cikin na'urar gyarawa, injin inverter, da majalisar kulawa don cire ƙura. Ko ƙananan mashigar iska da na sama na mitar mai canzawa sun tara ƙura ko kuma an toshe su saboda yawan ƙura. Mai sauya mitar yana buƙatar babban adadin iskar iska don ɓatar da kansa na zafi, don haka bayan yana gudana na ɗan lokaci, tarin ƙurar saman yana da matukar mahimmanci, kuma tsaftacewa na yau da kullun da cire ƙura ya zama dole.
2. Bude kofofin gaba da na baya na mai sauya mitar, a hankali duba AC da DC busbars don nakasawa, lalata, da oxidation, bincika screws a cikin haɗin busbar, bincika sukurori a kowane madaidaicin shigarwa, da kuma duba tsufa, fashe, ko nakasar zanen gado ko ginshiƙan da ake amfani da su don gyarawa. Idan akwai, maye gurbin kuma sake ƙarfafa su a kan lokaci. Gyara kuma sake shigar da gurɓatattun sandunan bas.
3. Bayan an cire kura a allunan da’ira, da ababen hawa, da sauransu, sai a yi maganin da ya dace na hana lalata, a shafa fenti, sannan a cire bas din da ke da wani fanni ko harbin bindiga kafin a yi maganinsu. Don allunan rufin da suka sami ɓarkewar ɓarna, dole ne a cire ɓangarorin da suka lalace, kuma a yi amfani da allunan ƙirar matakan da suka dace don ware su kusa da lalacewa. Yakamata a tsaurara, a gwada, kuma a ga cewa sun cancanta kafin a fara amfani da su.
4. Bincika idan magoya baya a cikin majalisar gyarawa da inverter cabinet suna gudana kuma suna juyawa akai-akai. Lokacin tsayawa, jujjuya su da hannu don lura idan ramukan sun makale ko yin amo. Idan ya cancanta, maye gurbin ko gyara bearings.
5. Gudanar da cikakken dubawa na shigarwar, gyarawa da jujjuyawar, da shigar da DC cikin sauri, kuma maye gurbin su da sauri idan sun ƙone.
6. Yakamata a bincika masu iya aiki a cikin tsaka-tsakin da'irar DC don yayyowa, faɗaɗawa, kumfa, ko nakasu na casing, da kuma ko bawul ɗin aminci ya karye. Idan sharuɗɗa sun ba da izini, ana iya gwada ƙarfin ƙarfin, ɗigogi na yanzu, da jurewar wutar lantarki na capacitors. Capacitors da ba su cika buƙatun ba ya kamata a maye gurbinsu. Domin sababbin capacitors ko capacitors da ba a yi amfani da su na dogon lokaci ba, dole ne a yi amfani da su kafin maye gurbin. Rayuwar sabis ɗin tace capacitors gabaɗaya shekaru 5 ne. Ga capacitors waɗanda aka yi amfani da su fiye da shekaru 5 kuma sun karkata sosai daga ƙa'idodin ganowa dangane da ƙarfin aiki, ɗigogi na yanzu, jure wa wutar lantarki, da dai sauransu, ya kamata a aiwatar da wani bangare ko cikakken maye kamar yadda ya dace.
7. Perform electrical testing on the diodes and GTOs in the rectifier and inverter sections, measure their forward and reverse resistance values, and carefully record them in a pre prepared table to check whether the resistance values between each pole are normal and whether the consistency of devices of the same model is good. Replace them if necessary.
8. Inspect the main contactors and other auxiliary contactors inside the A1 and A2 incoming cabinets, carefully observe whether the dynamic and static contacts of each contactor have arcing, burrs, surface oxidation, and unevenness. If such problems are found, replace the corresponding dynamic and static contacts to ensure safe and reliable contact.
9. Carefully inspect the terminal block for aging, looseness, hidden faults such as short circuits, secure connections of all connecting wires, damaged wire skins, and secure plug connections of all circuit boards. Whether the connection of the main power line is reliable, whether there is heating or oxidation at the connection, and whether the grounding is good.
10. Is there any abnormal noise, vibration, or burnt smell in the reactor.
In addition, if conditions permit, the filtered DC waveform, inverter output waveform, and input power harmonic components can be measured.
3、 Replacement of spare parts
A frequency converter is composed of various components, some of which may gradually decrease in performance and age after long-term operation, which is also the main reason for the failure of the frequency converter. In order to ensure the long-term normal operation of the equipment, the following components should be replaced regularly:
1. Cooling fan
The power module of a frequency converter is a device that generates severe heat, and the heat generated by its continuous operation must be discharged in a timely manner. The lifespan of a typical fan is approximately 10kh to 40km. According to the continuous operation of the frequency converter, the fan needs to be replaced every 2-3 years. There are two types of direct cooling fans: two wire and three wire. One wire of the two wire fan is the positive wire, and the other wire is the negative wire. When replacing, do not connect it incorrectly; In addition to the positive and negative poles, there is also a detection line for the three wire fan. Be careful when replacing it, otherwise it may cause the frequency converter to overheat and sound an alarm. AC fans are generally divided into 220V and 380V, so do not mistake the voltage level when replacing them.
2. Filter capacitor
Intermediate DC circuit filter capacitor: wanda kuma aka sani da electrolytic capacitor, babban aikinsa shi ne tausasa wutar lantarki ta DC da kuma shayar da ƙananan mitoci a cikin DC. Zafin da ake samu ta hanyar ci gaba da gudanar da aikinsa, haɗe da zafin da na'ura mai canzawa da kanta ke haifarwa, zai hanzarta bushewar electrolyte ɗinsa, kai tsaye yana shafar ƙarfinsa. A karkashin yanayi na al'ada, rayuwar sabis na capacitors kusan shekaru 5 ne. Ana bada shawara don bincika capacitance akai-akai sau ɗaya a shekara. Gabaɗaya, idan capacitance ya ragu da fiye da 20%, ya kamata a maye gurbin sabon capacitor na tacewa.