Masu samar da kayan aikin mai sauya mitar suna tunatar da ku cewa tare da zuwan zamanin masana'antu, amfani da masu sauya mitar yana ƙara shahara. Muna buƙatar tabbatar da zaɓi da daidaitawa na masu sauya mitar ta hanyar fara zaɓar nau'in daidai bisa yanayin nauyin. Ka'ida ta gaba ɗaya ita ce ta dace da yanayin halayen kaya tare da halayen mai sauya mitar.
Lokacin zabar mai sauya mitar, ya kamata a yi amfani da ainihin ƙimar halin yanzu a matsayin ginshiƙi don zaɓar mai sauya mitar, kuma ƙimar ƙarfin motar ba za a iya amfani da ita azaman tunani kawai ba. Na biyu, ya kamata a yi la'akari da cewa fitarwa na mitar mai canzawa ya ƙunshi babban tsari na jituwa, wanda zai iya haifar da ƙarfin wutar lantarki da ingancin motar.
Matching Voltage: Madaidaicin ƙarfin lantarki na mai sauya mitar ya yi daidai da ƙimar ƙarfin lantarki na injin.
Daidaitawa na yanzu: Don fafuna na centrifugal na yau da kullun, ƙimar halin yanzu na mai sauya mitar yayi daidai da ƙimar halin yanzu na injin. Don kaya na musamman irin su famfo mai zurfi na ruwa, ya zama dole a koma zuwa sigogin aikin motsa jiki don ƙayyade inverter halin yanzu da karfin juyi dangane da matsakaicin halin yanzu. Saitin mai sauya mitar na yanzu bai kamata ya zama ƙasa da sau 1.1 na halin yanzu na injin ba, kuma ana saita matsakaicin na yanzu zuwa sau 1.5 na halin yanzu na injin.
Game da Daya Zuwa Dayawa
One to many refers to a frequency converter with multiple electric motors. The capacity of the frequency converter is the sum of the capacities of multiple motors (based on current), and it is best to amplify it by 10% to 15%. At the same time, it is necessary to ensure that each motor is loaded appropriately, with as much force as possible, neither running empty nor overloaded. Each motor should perform its own duties, cooperate with each other, and coexist peacefully; But if the control is not good, some loads are heavy, some loads are light, some are exhausted, and some are idle. As a result, the motor with heavy loads heats up and burns, and the entire system is paralyzed, which is not worth the loss. Therefore, be careful when delaying for a long time.
So, conversely, can we drag one more frequency converter with one electric motor? Answer: Absolutely prohibited!!!
About cables
If the frequency converter needs to operate with a long cable, measures should be taken to suppress the influence of the long cable on the ground coupling capacitance and avoid insufficient output of the frequency converter. Therefore, in this case, the capacity of the frequency converter should be increased by one level or an output reactor should be installed at the output end of the frequency converter. When a frequency converter is used to control several motors in parallel, it is necessary to consider that the total length of the cables from the frequency converter to the motors is within the allowable range of the frequency converter.
Regarding special application scenarios
1. If the ambient temperature is high, the switching frequency is high, and the altitude is high, it will cause the frequency converter to reduce its capacity, and the frequency converter needs to be amplified by one level for selection.
2. When using a frequency converter to drive a high-speed motor, due to the low reactance of the motor, the increase in high-order harmonics leads to an increase in the output current value. Therefore, the selection of frequency converters for high-speed motors should have a capacity slightly larger than that of ordinary motors.
3. When driving explosion-proof motors, the frequency converter does not have explosion-proof structures and should be placed outside of hazardous areas.
4. When choosing a frequency converter, it is important to pay attention to whether its protection level matches the situation on site.
other
1. When using a frequency converter to drive a wound rotor asynchronous motor, most of the existing motors are utilized. It is easy to cause overcurrent tripping due to ripple current, so a frequency converter with slightly larger capacity than usual should be selected.
2. For loads with large torque fluctuations such as compressors and vibration machines, as well as peak loads such as hydraulic pumps, it is necessary to understand the power frequency operation and choose a frequency converter with a rated output current greater than its maximum current.
3. Lokacin amfani da na'ura mai sauya mitar don sarrafa na'urar busar ta Roots, saboda yawan lokacin da yake farawa, yana da mahimmanci a kula da ko karfin mitar ya isa lokacin zabar ta.
4. Lokacin amfani da mai sauya mitar don fitar da motar rage gear, yawan amfani yana iyakance ta hanyar lubrication na sassan jujjuyawar kayan. Kar a wuce iyakar saurin da aka yarda.
5. Single lokaci Motors ba su dace da mita Converter drive.
Tasiri da ma'auni na nisa tsakanin mai sauya mitar da motar akan tsarin
A cikin wuraren amfani da masana'antu, nisa tsakanin mai sauya mitar da shigarwar motar za'a iya kasu kusan zuwa yanayi uku: nisa mai nisa, matsakaiciyar nisa, da ɗan gajeren nesa. A cikin 20m ana la'akari da kewayon kusa, 20-100m ana ɗaukar matsakaiciya, kuma sama da 100m ana ɗaukar dogon zango.
Idan nisa tsakanin mai sauya mitar da injin yana tsakanin 20m, ana iya haɗa shi kai tsaye zuwa mai sauya mitar;
Don haɗin nisa na matsakaici tsakanin masu sauya mitar da injina daga 20m zuwa 100m, wajibi ne don daidaita mitar mai ɗaukar hoto don rage jituwa da tsangwama; Don haɗin nisa mai nisa sama da 100m tsakanin masu canza mitar mitoci da injina, ba wai kawai ya kamata a rage mitar mai ɗaukar nauyi ba a matsakaici, amma kuma ya kamata a shigar da na'urorin AC masu fitarwa.