Misalai DOL Starter?

Zai ya wani DOL Starter?

DOL Na nufin inisiyator

DOL Starter (Direct On Line Starter) yana daya daga cikin hanyoyi na bazuwa na motorin induction na tasiri uku. A cikin DOL starter, an kula motorin induction zai zama da kyau zuwa takardun 3-phase power supply, kuma DOL starter yana bayar da duk voltage na line zuwa terminalon motor. Motorin yana da inganci kamar da yake aiki kafin an kula shi zuwa power supply. DOL motor starters suna da inganci da, a wasu models, condition monitoring. Wannan shine diagram na wiring na DOL starter:

Mechanism na bazuwa

Diagram na wiring na DOL stater ana bayyana a nan. DOL starter na biyu buttons, button na green don bazuwa da button na red don kammala motor. DOL starters suna da MCCB ko circuit breakers, contactors, da overload relays don inganci. Biyar wannan buttons, na green da red ko start da stop buttons suka kontrola contacts.

Don bazuwa motor, laka button na green don kammala contact, kuma har za'a bayar da duk voltage na line zuwa motor. Contactors zai iya haɗa 3 ko 4 poles; Figure na nan ana bayyana 4-pole contactor.

Tana da uku NO (normally open) contacts don kula motor zuwa power cord, kuma contact na nauci shine "hold contact" (auxiliary contact) don energize contactor coil baƙin sakamakon start button.

Idan akwai abin da ba ta gamsu, auxiliary coil zai yi amfani, saboda haka starter zai kammala motor daga power supply.

Principle na aiki

Principle na aiki na DOL starter tana faru ne a kansu kan three-phase main power supply zuwa motor. Control circuit ana kula zuwa biyu phases kuma ana amfani shi kawai daga su.

Idan muna laka button na start, current tana ɗaya zuwa contactor coil (magnetizing coil) da control circuit.

Current tana energize contactor coil kuma tana faɗa contacts zuwa kammalawa, kuma motor zai iya amfani three-phase power supply. Control circuit na DOL Starter shine hakan.

Fadada DOL Starter

• Starter na musamman da kuma mai karfi.

• Design, operation da control masu kalmomi da kuma mai karfi.

• Yana bayar da yawanci starting torque a lokacin bazuwa.

• Yana da ma'ana da kuma troubleshoot.

• DOL starter tana kula power supply zuwa triangular winding na motor

Mafi girma na DOL Starter

• High starting current (5-8 times full load current).

• DOL Starter tana faɗa drop na voltage kuma yana da ma'anar da yake zama daidai da motors mai hagu.

• DOL Starter zai ƙasa tsarin aiki na machine.

• High mechanical strength.

• Unnecessarily high starting torque

Application na DOL starter

Applications na DOL starters suna da muhimmanci motors inda high inrush current ba tana faɗa drop na voltage a power supply circuit (ko idan wannan drop na voltage yana da ma'anar da yake zama daidai).

DOL starters suna amfani da su don bazuwa small pumps, conveyor belts, fans, da compressors. A cikin asynchronous motors (kamar three-phase squirrel-cage motors), motor tana samun high starting current har zuwa lokacin da yake aiki zuwa full speed.