Abahlinzeki bemishini esekela i-frequency converter bakukhumbuza ukuthi izinjini zikagesi ziwumthombo oyinhloko wamandla wemishini yokukhiqiza yezimboni yesimanje. Isikhathi eside, izinkinga ezifana nokusetshenziswa okuphezulu kwamandla, ukulawulwa kwesivinini esikhulu, kanye nokungaqini kahle kokulawulwa kwezimboni zamamotho kagesi kube nomthelela omkhulu ekukhiqizweni kwezimboni. Ukusetshenziswa kwama-frequency converters kuzixazulule ngempumelelo lezi zinkinga zobuchwepheshe zamamotho kagesi. Iziguquli zemvamisa zisebenzisa ubuchwepheshe be-microelectronics kanye nobuchwepheshe bokuguqula imvamisa ukuze kulungiswe imvamisa kanye ne-voltage yokuphakelwa kwamandla okuphumayo ngokusekelwe ezidingweni zangempela zenjini ye-voltage yokuphakelwa kwamandla ngesikhathi sokusebenza, kuncike ekunqanyulweni kwama-IGBT angaphakathi ukuze kuzuzwe ukulawulwa kwesivinini nokonga amandla.
1. Isigaba somthwalo we-air conditioning
Izakhiwo zamahhovisi, izinxanxathela zezitolo, nezinye izitolo ezinkulu nezimboni zonke zine-air conditioning emaphakathi, edla ugesi omningi ngesikhathi sokusetshenziswa kukagesi okuphezulu kakhulu ehlobo. Esimweni sezulu esishisayo, ukusetshenziswa kukagesi kwesiphephetha-moya e-Beijing, e-Shanghai, nase-Shenzhen kubala ngaphezu kuka-40% kagesi ophakeme. Ngakho-ke, ukusebenzisa isiguquli semvamisa ukushayela iphampu yesiqandisi, iphampu yamanzi abandayo, kanye nefeni yesistimu yesimo somoya kuwubuchwepheshe obuhle kakhulu bokonga amandla. Njengamanje, kunezinkampani eziningi ezisebenza ngokukhethekile kwezomoya okonga amandla ezweni lonke, ubuchwepheshe obuyinhloko wukulawulwa kwesivinini esishintshashintshayo sama-converter amafrikhwensi ukonga amandla.
2. Umthwalo wohlobo lwe-crusher
There are many crushers and ball mills used in metallurgical mines and building materials, and the effect of using frequency conversion for such loads is significant.
3. Large kiln and calcination furnace loads
Previously, large industrial rotary kilns (converters) in metallurgy, building materials, caustic soda, etc. mostly used DC, rectifier motors, slip motors, cascade speed regulation, or intermediate frequency unit speed regulation. Due to the use of slip rings or low efficiency in these speed control methods, many units have adopted variable frequency control in recent years, which has achieved excellent results.
4. Compressor type load
Compressors also belong to the widely used load category. Low pressure compressors are widely used in various industrial sectors, while high-pressure large capacity compressors are widely used in steel (such as oxygen concentrators), mining, fertilizers, and ethylene. Adopting variable frequency speed regulation brings advantages such as low starting current, energy saving, and optimized equipment service life.
5. Rolling mill load
In the metallurgical industry, in the past, large rolling mills often used AC-DC-AC frequency converters. In recent years, AC-DC-AC frequency converters have been adopted, and AC conversion of rolling mills has become a trend, especially in light load rolling mills. For example, the multi stand aluminum rolling mill unit of Ningxia Ethnic Aluminum Products Factory uses a universal frequency converter to meet low-frequency load starting, synchronous operation between stands, constant tension control, and simple and reliable operation.
6. Hoist type load
The winch type load adopts variable frequency speed regulation, which is stable and reliable. The blast furnace hoisting equipment in the iron plant is the main equipment for transporting ironmaking raw materials. It requires smooth starting and braking, uniform acceleration and deceleration, and high reliability. The original method often used cascade, DC, or rotor series resistance speed regulation, which had low efficiency and poor reliability. Replacing the above speed regulation method with an AC frequency converter can achieve ideal results.
7. Converter type load
Converter type loads, using AC frequency conversion instead of DC units is simple, reliable, and operates stably.
8. Roller type load
Roller type loads are mostly used in the steel and metallurgical industry, and AC motor frequency conversion control is adopted to improve equipment reliability and stability.
9. Pump loads
Pump loads have a large quantity and wide range, including water pumps, oil pumps, chemical pumps, mud pumps, sand pumps, etc. There are low-pressure small and medium capacity pumps, as well as high-pressure large capacity pumps.
Many water companies use variable frequency speed regulation for their water pumps, chemical pumps in the chemical and fertilizer industries, reciprocating pumps, and mud pumps in industries such as non-ferrous metals, all of which produce very good results.
10. Crane and dump truck loads
Cranes, dump trucks, and other loads require high torque and stability, frequent forward and backward movements, and reliability. Variable frequency devices can control cranes and dump trucks to meet these requirements.
11. Wire drawing machine type load
The wire drawing machine for producing steel wire requires high-speed and continuous production. The steel wire strength is 200Kg/mm2, and the speed control system requires high precision, high stability, and synchronization.
12. Transport vehicle loads
The use of frequency conversion technology in coal mine raw coal loading vehicles or steel mill water transport vehicles is very effective. Fast start stop, strong overload capacity, flexible forward and reverse rotation, achieving smooth coal surface and correct weight (no excessive or insufficient loading), basically without manual operation, improving raw coal production efficiency and saving electricity.
13. Elevators, elevated tourist vehicles, and other types of loads
Due to the fact that elevators are manned vehicles, it is required that the drag system be highly reliable, and frequent acceleration, deceleration, and forward/reverse rotation are required. The improvement of elevator dynamic characteristics and reliability not only enhances the sense of safety, comfort, and efficiency of elevator ride, but also increases the overall safety, comfort, and efficiency of elevator passengers. In the past, elevator speed regulation was mostly DC, but in recent years, it has gradually shifted to AC motor variable frequency speed regulation, whether in Japan or Germany. Many elevator factories in our country are competing to equip elevators with variable frequency speed regulation. Shanghai Mitsubishi, Guangzhou Hitachi, Qingdao Fuji, Tianjin Otis, and others all use AC variable frequency speed regulation. Many previously produced elevators have also undergone frequency conversion renovations.
14. Feeder type load
Ezimbonini ezifana ne-metallurgy, amandla, amalahle, nobunjiniyela bamakhemikhali, kuneziphakeli eziningi. Noma ngabe i-disc feeder noma isiphakeli esidlidlizayo, ukusetshenziswa kokulawulwa kwesivinini esishintshashintshayo kunomphumela obalulekile. Isiphakeli sediski somugqa wokukhiqiza we-sulfuric acid efekthri kadayi ye-Jihua Company ekuqaleni sasidizayinelwe ukulawula isivinini sokushelela, ngetorque yefrikhwensi ephansi, ukungasebenzi kahle, kanye nokuma njalo. Ngemuva kokwamukela ukulawulwa kwesivinini sokuguqulwa kwemvamisa, ngenxa yokuba umshini ongavumelanisiwe, unokwethenjelwa okuphezulu, ukonga amandla, futhi okubaluleke kakhulu, ivaliwe-loop ngesidlulisi sokushisa ukuze kuqinisekiswe ukunemba kwezinto zokuhamba, ukuze zingabangeli izingozi ngenxa yokushisisa ngokweqile kokuhamba kwe-oxidant, iqinisekisa ukuhleleka kokukhiqiza.