Me kuke so kuɗi Electrical Drive Systems?

Takaitaccen

Sistem na gajarta motori mai shirye-shirye yana nufin yanayi da ke kula tsari, hakkin gajarta, da kuma hali na motori mai shirye-shirye. Idan cikin har zuwa daga cikin sistemai na gajarta, akwai muhimmanci masu siffofin baka, amma suna da kayan abubuwa da suka sa.

Sistemai Na Gajarta Motori Mai Shirye-shirye

Rikitar tana bayyana tsarin daidai na gajarta motori mai shirye-shirye a kan zamani. A cikin wannan tsari, an samu mafi girman gajarta mai shirye-shirye (AC) daga Center ta Gajarta Motori (MCC). MCC yana aiki a matsayin kokar gajarta, wanda ke maimaita gajarta zuwa kungiyoyi da ke kan kasa.

A cikin zangon kasuwanci, akwai kungiyoyi da ke kan MCC. Waɗannan MCC, ba tare, sun samu mafi girman gajarta daga Center ta Gajarta Noma (PCC). Duka MCC da PCC suna yi amfani da air circuit breakers a matsayin abubuwan da suke kula gajarta. Waɗannan abubuwan da suke kula gajarta suna da takaitaccen da suke kula gajarta da kafin ya kai 800 volts da 6400 amperes, wanda ke inganta hankalin da kuma karkashin gajarta a cikin sistemai na gajarta da kuma jamiyar kasuwanci.

An bayyana GTO inverter controlled induction motor drive a cikin rikitar:

Muhimman Abubuwan Sistemai Na Gajarta Motori Mai Shirye-shirye

Duk da cewa waɗannan ne su ne muhimman abubuwan cikin wasu sistemai na gajarta:

• Switch mai girman AC

• Kungiyoyi na power converter da inverter

• Switchgear mai girman DC da AC

• Logikin gajarta

• Motori da kafin da shi

Muhimman abubuwan sistemai na gajarta shirye-shirye ana bayyana a cikin wannan.

Switchgear Mai Girman AC

Switchgear mai girman AC yana da switch-fuse unit da AC power contactor. Waɗannan abubuwan suna da takaitaccen da suke kula gajarta da kafin ya kai 660V da 800A. Amma, a halin yawan gajarta, ana iya amfani da bar-mounted contactor, kuma air circuit breaker yana aiki a matsayin switch mai girman. Bar-mounted contactor yana haɗa takaitaccen da suke kula gajarta da kafin ya kai 1000V da 1200A.

Waɗannan switchgear suna da High Rupturing Capacity (HRC) fuse da takaitaccen da suke kula gajarta da kafin ya kai 660V da 800A. Da kuma wadannan, akwai mekanismi na protection na thermal overload don kula shiga. A wasu lokutan, za a iya kawo contactor da switchgear da moulded case circuit breaker don inganta performance da kuma protection.

Kungiyoyi Na Power Converter/Inverter

Wannan kungiyoyi yana da kungiyoyi biyu: electronics na power da electronics na control. Kungiyoyi na power yana da semiconductor devices, heat sinks, semiconductor fuses, surge suppressors, da kuma cooling fans. Waɗannan abubuwan sun yi aiki a cikin conversion tasks na power.

Kungiyoyi na control yana da triggering circuit, regulated power supply, da driving and isolation circuit. Driving and isolation circuit yana aiki a matsayin wanda ke kula flow na power zuwa motori.

Idan drive yana aiki a cikin configuration na closed-loop, akwai controller da current da speed feedback loops. Control system yana da three-port isolation, wanda ke kula cikin power supply, inputs, da outputs da insulation levels da suke inganta safety da reliability.

Line Surge Suppressors

Line surge suppressors suna da muhimmiyar aiki a kula voltage spikes na semiconductor converter. Wannan spikes suna faru a cikin line na power saboda switching on da off da loads da suka sama da line. Line surge suppressor, da inductance, yana kula da suppress voltage spikes.

Idan incoming circuit breaker yana aiki da kula supply na current, line surge suppressor yana absorba energy da aka trap. Amma, idan power modulator bai semiconductor device ba, ba zan iya buƙata line surge suppressor ba.

Control Logic

Control logic yana aiki a interlocking da sequencing cikin ayyukan drive system a cikin normal, fault, da emergency conditions. Interlocking yana aiki a kula abnormal da unsafe operations, wanda ke inganta integrity na system. Sequencing, daga baya, yana aiki a kula ayyukan drive kamar starting, braking, reversing, da jogging a cikin sequence da aka sanya. Don interlocking da sequencing masu yawa, ana iya amfani da programmable logic controller (PLC) don inganta flexible da reliable control.