升降貨梯http://www.jntr168.com/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,但是普通市內電源,都是三相交流的。如果要用直流馬達,必須裝有直流設備,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.
一般工廠內的升降貨梯,所用的馬達多數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,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.