Ingantaccen rhoti da kabtaccen karkashin mawarwari na motorin induksi

Induction motor da rotor resistance da shi ne da hankali mai kyau da starting torque. Starting torque yana nufin torque wanda ya faru a lokacin da motoci ta shugaba, wanda yake cikin abubuwan da ake amfani don bincike kungiyar motoci. A nan ne bayanai masu inganci game da alaka da ke kan rotor resistance da starting torque:

Equivalent circuit model at startup

Don in fahimta tushen rotor resistance zuwa starting torque, yana da kyau in fahimta equivalent circuit model na induction motor a lokacin shugabannin. A lokacin da motoci ta shugaba, sako shi zero, kuma equivalent circuit zai iya haɗa sabon circuit da ke ciki da stator winding da rotor winding.

Torque expression at startup

A lokacin shugabannin, torque T na induction motor zai iya bayyana da wannan formula:

• Es ita ce stator voltage;

• R 'r ita ce rotor resistance (converted to the stator side);

• Rs ita ce stator resistance;

• Xs ita ce stator reactance;

• X 'r ita ce rotor reactance (converted to the stator side);

• k ita ce constant factor wanda yake cikin gine da tsarin motoci.

Effect of rotor resistance

Starting torque proportional to rotor resistance: Daga cikin wannan formula, starting torque proportional to rotor resistance R 'r. Yana nufin cewa zama rotor resistance zai zama starting torque.

Starting current Is inversely proportional to the rotor resistance: Starting current inversely proportional to the rotor resistance R 'r, yana nufin cewa zama rotor resistance zai kawo starting current.

Concrete impact

• Increase in starting torque: Zama rotor resistance zai zama starting torque, wanda yana da muhimmanci a cikin abubuwan da ke buƙata starting torques masu yawa.

• Reduced starting current: Zama rotor resistance zai kawo starting current, wanda zai taimakawa da grid daga current shocks masu yawa, musamman idan mutane miliyan da suka shugaba a lokacin sama da suka.

•   Efficiency impact:Zama rotor resistance zai zama starting torque, amma a lokacin da motoci ya yi aiki, rotor resistance masu yawa zai ba da energy loss masu yawa, wanda zai kawo efficiency.

Coil rotor induction motor (WRIM)

Wire-wound rotor induction motors (WRIM) suna ba da amincewa don external resistance through slip rings and brushes, wadanda suke haɗa rotor resistance a tunanin zuwa starting torque masu yawa. Ba da shugaban, normal operation efficiency na motoci zai iya duba da kowace da ƙare additional resistance.

Sum up

Yana da alaka proportional da rotor resistance na induction motor da starting torque. Zama rotor resistance zai zama starting torque, amma yana iya haɗa starting current da operating efficiency. Saboda haka, a lokacin da ake gina da kuma zama motoci, zai da kyau in a duba da factors kamar starting torque, starting current, da operating efficiency don samun best performance balance.