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电动机和生产机械间的变速装置的传速比,直接影响到电力拖动装置的技术经济指标。正确地选择传速比及相应的电动机额定转速,是设计电力拖动装置的一个重要问题。 在本文中阐述了在几种主要情况下现有的选择最佳传速比的方法。作者对於某些情况提出了一些补充意见。 在四十多年以前就有一些学者开始研究本文中所讨论的问题。L.A.尤曼斯基根据生产机械起动到给定的速度,能保证起动时间最短的条件出发,导出了计算传速比的公式。А.И.采利柯夫也导出了同样的公式,但是他是根据在给定的时间内,使生产机械的工作轴能转过最多转数的条件出发。 H.A.齐申科对于生产机械以一定的速度旋转,忽略负载转矩,保证起动制动时间最短的情况,导出了计算公式。而Р.Л.阿朗诺夫的公式则是考虑负载转矩的影响,而假定起动转矩同制动转矩相等。 本文作者在同样的条件下,既考虑负载转矩,又考虑起动转矩与制动转矩的不等,得出如下的方程式: GD_δ~2MтMпK~4+2GD_δ~2Mм(Mп-Mт)K~3-(GDм~2MтMп+3GD_δ~2Mм~2)K~2- -GDм~2Mм~2=0。上述的公式都可以看成是这个普遍方程式的特例。 这个方程式与А.И.采利柯夫和Н.П.库尼茨基从另外的观点得出的方程式相同。他们的条件是机械移动行程不大,尚未达到稳态速度的未达稳态情况,?
The speed ratio of the transmission between the motor and the production machinery directly affects the technical and economic indicators of the electric drive. Correct choice of transmission ratio and the corresponding motor rated speed is an important issue in the design of electric drives. In this paper, the existing methods for selecting the optimal speed ratio in several major situations are illustrated. The author made some suggestions for some situations. Some forty years ago some scholars began to study the issues discussed in this article. L.A. Youmanski according to the production of machinery to a given speed, can guarantee the shortest starting time starting conditions, derived the formula to calculate the transmission ratio. The same formula was also derived by А.И. Zelikov, but based on the condition that the working shaft of the production machine can be turned over a maximum number of revolutions at a given time. H.A. Qishenke For the production of machinery to a certain speed rotation, ignoring the load torque, to ensure the shortest start braking time, derived the formula. And Р.Л. Alonov’s formula is to consider the impact of load torque, and assumed starting torque equal to the braking torque. Under the same conditions, the author takes into account both the load torque and the starting torque and the braking torque, and obtains the following equation: GD_δ ~ 2M тM пK ~ 4 + 2GD_δ ~ 2M м ~ 3- (GDMN ~ 2MтMп + 3GD_δ ~ 2Mм ~ 2) K ~ 2- -GDм ~ 2Mм ~ 2 = 0. The above formula can be seen as a special case of this universal equation. This equation is the same as that from А.И. Zelikov and Н.П. Kunitsky from another point of view. Their condition is that mechanical movement is not large, has not yet reached steady-state speed is not up to steady state ,?