升降貨梯http://www.zjfutures.cn/所用的馬達，要能承受極頻繁的啟動、停止和換向作用；能在重載下起動，就是要有較高的起動轉(zhuǎn)矩，以及較小的起動電流。對于這三個要求，直流馬達要比交流馬達來得合適一些，但是普通市內(nèi)電源，都是三相交流的。如果要用直流馬達，必須裝有直流設(shè)備，改變交流為直流。
Cargo lifter motor used to be able to withstand extremely frequent starting, stopping and reversing the role; can start under heavy load, is to have a high starting torque, as well as smaller starting current. For these three requirements, the DC motor AC motor is more appropriate than some, but ordinary city power, are three-phase AC. If you use DC motors, DC equipment must be installed to change the AC to DC.
一般工廠內(nèi)的升降貨梯，所用的馬達多數(shù)是交流三相感應型的，無論是鼠籠型或者滑圈型的都可。為了要有較高的起動轉(zhuǎn)矩，馬達的馬力，常比實際需要的馬力，約大三分之一左右，鼠籠型馬達，多用于低速，而滑圈型馬達，則用于速度較高的升降貨梯。 又有一種變速的交流感應馬達，是在同一定子槽內(nèi)，埋放二套線圈這樣可以得到二種速率。在起動時，用高速線圈；需要減速時，可趁高速線圈仍接于電源時，將低速線圈亦接于電源，然后關(guān)斷高速線圈，將低速線圈的電阻，加以短接。這種變速的手續(xù)，亦可由定時繼電器來完成。
General cargo lifter within the plant, most of the motor used is a three-phase AC induction type, either squirrel cage or slip ring type available. In order to have a high starting torque, motor horsepower, horsepower often than actually needed, about one-third larger, squirrel cage motor, used for low-speed, and slip ring type motor is used for higher speed the cargo lifter. Harboring a variable speed AC induction motor, the stator is in the same slot, put the two sets of coils buried so obtained two kinds of rates. When starting with a high-speed coil; when the need to slow down, you can still take advantage of high-speed coil connected to the power supply when the coil is also connected to the low-power, high speed and then turn off the coil, the coil resistance at low speed, to be shorted. This shift procedure, can also be done by a timing relay.
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