The supplier of the inverter energy feedback unit reminds you that the centrifuge is a high inertia constant torque device, and it is precisely this mechanical characteristic that makes the braking unit one of the main components of the centrifuge operation control. It is of great significance for the process control and mechanical efficiency improvement of the centrifuge. When the centrifuge slows down, if free parking is used, the actual parking time of the centrifuge will exceed 2 hours, which greatly restricts the use and process control of the centrifuge. Using mechanical braking method not only takes too long for larger capacity centrifuges, but also poses significant risks to control and safety; So we can only use frequency conversion speed regulation braking method. When using frequency conversion speed regulation braking, the set braking time of the frequency converter is relatively short. Due to the large moment of inertia of the centrifuge, the rotating drum of the centrifuge drives the motor to rotate. At this time, the speed of the motor is higher than the synchronous speed of the output of the frequency converter. The motor is in a generating state, causing the DC bus voltage of the frequency converter to rise. If this energy cannot be consumed and the DC bus voltage remains within the normal range, the frequency converter will have a DC overvoltage alarm fault and cannot work normally; In order to consume this regenerative energy, the braking unit and braking resistor cooperate with each other. When the braking unit detects that the DC bus voltage exceeds the normal working range value, the circuit channel between the DC bus and the braking resistor is opened to dissipate the regenerative energy generated by the motor on the braking resistor, thereby limiting the DC bus voltage and allowing the deceleration process to proceed normally.
Due to technological and cost limitations, previous centrifuge equipment manufacturers have adopted the above-mentioned energy consumption braking method. The regenerative electrical energy generated by the motor is directly consumed in the braking resistor, and a large amount of regenerative braking electrical energy cannot be utilized. Moreover, the braking unit and braking resistor are limited by the distribution room environment in terms of power, otherwise a large amount of heat will cause overheating protection of the braking unit and frequency converter, affecting the smooth progress of production. With the continuous development of electronic technology, energy feedback braking units are gradually being developed and utilized. Imported feedback braking units are limited in use due to their high price, long recovery period, high maintenance costs, and high maintenance level requirements. Nowadays, Shenzhen Hexing Energy has developed multiple series of energy feedback products with world leading technology, making the widespread application of feedback products a reality.
Daga cikin raka'o'in birki na gida da na waje da yawa, na'urar amsa makamashin sine wave ta PSG wanda Shenzhen Jianeng ya samar ya fi karɓuwa daga masu amfani. Siffofinsa sune kamar haka:
1. Cikakken adadin ceton makamashi har zuwa 20% ~ 60%
2. Haɗu da ma'aunin fasaha na EN55022 mai ƙarfi
Fitar da igiyar ruwa, THD <5%, ba da amsawar wutar lantarki mai tsabta koyaushe
3. Ɗauki fasahar nuna wariya ta tsarin lokaci ta atomatik
Ta hanyar amfani da fasahar nuna wariya ta jerin lokaci ta atomatik, jerin lokaci na grid ɗin wutar lantarki na matakai uku na iya haɗawa da yardar rai ba tare da buƙatar bambance-bambancen hannu ba.
4. Gina cikin fuse
Kariyar gajeriyar kewayawa tana cikin wurin don tabbatar da amintaccen aiki na mai sauya mitar.
5. Yana iya cire haɗin kai ta atomatik daga kuskure don tabbatar da aiki na yau da kullun na mai sauya mitar
Yana da ƙari tare da tsarin kulawa na asali na mai sauya mitar kuma baya canza yanayin sarrafawa na asali na mai sauya mitar.
6. Yin amfani da fasaha mai mahimmanci da yawa, masu jituwa tare da duk nau'ikan masu canzawa
7. Canjin canjin makamashi yana da girma kamar 97.5%, koyaushe yana jagorantar masana'antar
Muna tabbatar da irin wannan ingantaccen ingantaccen juzu'i ba tare da sadaukar da ingancin makamashi mai sabuntawa da kwanciyar hankali na sauran kayan aiki ba, wanda ya sa ya fi mahimmanci.
8. Gina a cikin reactor da tacewa, toshe da wasa
PSG ta ɗauki haɗe-haɗen ƙira, tare da ginannun reactors da masu tacewa, don haka masu amfani ba sa buƙatar siyayya daban.
9. Cikakken maye gurbin juriya
PSG na iya maye gurbin juriya gaba ɗaya, canza abubuwan da ke cinye makamashi zuwa abubuwan samar da wutar lantarki da adana sama da kashi 60% na sararin shigarwa.
10. Kawar da aminci
Cire manyan masu ƙarfi da ke haifar da zafi, rage yawan zafin jiki na yanayin samarwa, da kawar da haɗarin aminci.
11. Zai iya tsawaita rayuwar wasu na'urori
Rage saka hannun jari a cikin kayan sanyaya da adana farashi; Rage wutar lantarki a tsaye na iya tsawaita rayuwar sauran kayan inji da na lantarki.
12. Zaɓin yana da sauƙi kuma baya buƙatar ƙididdige ƙididdiga na juriya, juriya, da dai sauransu.
13. Mai sauƙin aiki, rage shigarwa da farashin horo
Kafin barin masana'anta, kowane samfurin PSG an riga an saita shi tare da sigogin fasaha waɗanda suka cika sama da 90% na buƙatun, yana sanya shi toshewa da wasa; A lokaci guda, don saduwa da buƙatun yanayin aiki masu rikitarwa, masu amfani kawai suna buƙatar daidaita matakin matakin kawai don tabbatar da amfani 100%. Don haka, ko da ba ƙwararren fasaha ba ne, zaku iya fara aiki da PSG cikin sauri.
14. Mai dacewa ga mitocin grid na duniya, ba tare da hani akan aikace-aikacen ba
Samfurin PSG THD ya dace da ka'idodin jituwa na duniya; EMC/EMI ya sadu da mafi ƙwaƙƙwaran EN55022 Class A; Ana iya samun aiki mai ƙarfi a mitocin grid daga 45Hz zuwa 65Hz.
Sabili da haka, aikace-aikacen samfuran PSG gaba ɗaya masu zaman kansu ne daga ƙuntatawa na yanki.
Binciken ceton makamashi
Sakamakon amfani da na'urar amsawar makamashin sine wave na PSG, ƙarfin aiki mai ƙarfi na drum ɗin centrifuge yana ɗaukar kayan zuwa sabbin makamashin lantarki kuma kai tsaye ana ciyar da shi zuwa grid ɗin wutar lantarki yayin raguwa, don haka ceton wutar lantarki mai yawa da rage yawan kuɗin wutar lantarki. Bugu da kari, bayan amincewa da martanin makamashi na PSG, an adana amfani da na'urar sanyaya iska a cikin dakin rarrabawa, an inganta yanayin aiki na kayan aikin lantarki, kuma an cimma tasirin ceton makamashi a daya bangaren. Don haka, wannan jarin yana da fa'ida sosai ga kamfani.