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注：表8-3中給出的每小時起動次數(shù)CZ只考慮了電動機轉子轉動慣量，但實際應用時還要計及被拖動機械的慣量，所以實際起動次數(shù)Z應按下式計算：C=(jm+jext)/jm Z=CZ/C式中，jm—電動機轉動慣量；jext—折算到電動機軸上的被拖動機械轉動慣量；CZ—只計及電動機轉子轉動慣量每小時起動次數(shù)(C=1時)。Z—計及傳動系統(tǒng)全部量。
Note: the starting times CZ given in table 8-3 only consider the moment of inertia of the motor rotor. However, in practical application, the inertia of the driven machine also need to be taken into account. Thus, the acutal starting times Z should be calculated as follows: C=(jm+jext)/jm Z=CZ/C, wherein jm-moment of inertia of motor;jext-inertia of the driven machine converted to motor shaft;CZ-starting times per hour(C=1h) only taken into account of the moment of inertia of the motor rotor;Z-inertia of the transmission system.