Masu samar da na'urar birki suna tunatar da ku cewa tare da saurin haɓaka fasahar wutar lantarki, fasahar kwamfuta, da fasahar sarrafa atomatik, fasahar watsa wutar lantarki na fuskantar sabon juyin juya hali. A fagen watsa wutar lantarki, tsarin sarrafa saurin mitoci masu canzawa sun zama na yau da kullun saboda babban inganci da kyakkyawan aiki. Fa'ida daga dabaru kamar adana makamashi, rage hayaki, da kare muhalli kore, a matsayin muhimmin kayan aiki don daidaita saurin mitar mitoci, masana'antar tuƙi mai canzawa ta zama ɗaya daga cikin masana'antu waɗanda ke da babbar kasuwa a cikin shekaru masu zuwa. Tare da shi yana zuwa bincike da aikace-aikacen ayyukan tuƙi mai canzawa. A ƙasa akwai wasu shawarwarin aikace-aikace don madaidaitan tuƙi.
1. Ya kamata a yi amfani da wayoyi masu kariya don sigina da layin sarrafawa don hana tsangwama. Lokacin da layin ya yi tsayi, kamar tsalle mai nisa na 100m, ya kamata a kara girman sashin giciye na waya. Kada a sanya sigina da layukan sarrafawa a cikin maɓalli ɗaya ko gada kamar layukan wutar lantarki don gujewa tsoma bakin juna. Zai fi kyau a sanya su a cikin magudanar ruwa don dacewa mafi dacewa.
2. The transmission signal mainly uses current signals, as current signals are not easily attenuated or interfered with. In practical applications, the signal output by sensors is a voltage signal, which can be converted into a current signal through a converter.
3. The closed-loop control of frequency converters is generally positive, meaning that when the input signal is large, the output is also large. But there is also a reverse effect, that is, when the input signal is large, the output quantity decreases.
4. When using pressure signals in closed-loop control, do not use flow signals. This is because pressure signal sensors have low prices, easy installation, low workload, and convenient debugging. But if there are flow ratio requirements in the process and precision is required, a flow controller must be selected, and a suitable flow meter must be selected based on actual pressure, flow rate, temperature, medium, speed, etc.
5. The built-in PLC and PID functions of the frequency converter are suitable for systems with small and stable signal fluctuations. However, due to the built-in PLC and PID functions only adjusting the time constant during operation, it is difficult to obtain satisfactory transition process requirements, and debugging is time-consuming.
6. Signal converters are also frequently used in the peripheral circuits of frequency converters, typically consisting of Hall elements and electronic circuits. According to signal transformation and processing methods, it can be divided into various converters such as voltage to current, current to voltage, DC to AC, AC to DC, voltage to frequency, current to frequency, one in multiple out, multiple in one out, signal superposition, signal splitting, etc.
7. When using a frequency converter, it is often necessary to equip it with peripheral circuits, which can be done in the following ways:
(1) A logic functional circuit composed of self-made relays and other control components;
(2) Buy ready-made unit external circuits;
(3) Choose a simple programmable controller;
(4) When using different functions of the frequency converter, function cards can be selected;
(5) Select small and medium-sized programmable controllers.
8. Reducing the base frequency is the most effective way to increase the starting torque. The principle analysis is as follows.
Due to the significant increase in starting torque, some difficult to start equipment such as extruders, cleaning machines, spin dryers, mixers, coating machines, mixers, large fans, water pumps, Roots blowers, etc. can all be started smoothly. This is more effective than usually increasing the starting frequency for starting. By using this method and combining it with the measures of changing from heavy load to light load, the current protection can be increased to the maximum value, and almost all equipment can be started. Therefore, reducing the base frequency to increase the starting torque is the most effective and convenient method.
(1) Lokacin amfani da wannan yanayin, mitar tushe ba dole ba ne ta ragu zuwa 30Hz. Ana iya rage shi a hankali kowane 5Hz, muddin mitar da aka samu ta raguwa na iya fara tsarin.
(2) Ƙananan iyakar mitar tushe bai kamata ya zama ƙasa da 30Hz ba. Daga ra'ayi na karfin juyi, ƙananan ƙananan iyaka, mafi girma da karfin juyi. Duk da haka, ya kamata kuma a yi la'akari da cewa IGBT na iya lalacewa lokacin da ƙarfin lantarki ya tashi da sauri kuma du/dt mai ƙarfi ya yi girma sosai. Haƙiƙanin sakamakon amfani shine cewa ana iya amfani da wannan ma'aunin haɓaka ƙarfin ƙarfi cikin aminci da ƙarfin gwiwa lokacin da mitar ta ragu daga 50Hz zuwa 30Hz.
(3) Wasu mutane suna damuwa cewa, misali, lokacin da aka saukar da mitar tushe zuwa 30Hz, ƙarfin lantarki ya riga ya kai 380V. Don haka, lokacin da aiki na yau da kullun na iya buƙatar kaiwa 50Hz, shin ƙarfin wutar lantarki ya kamata yayi tsalle zuwa 380V don motar ba zata iya jurewa ba? Amsar ita ce irin wannan lamari ba zai faru ba.
(4) Wasu mutane suna damuwa cewa idan mitar tushe ta ragu zuwa 30Hz, ƙarfin lantarki ya riga ya kai 380V. Don haka, aiki na yau da kullun na iya buƙatar mitar fitarwa na 50Hz don isa mitar ƙididdiga ta 50Hz. Amsar ita ce, yawan fitarwa zai iya kaiwa 50Hz.