【摘要】 <正> 一、前言近年来,在印染工业中由于加工织物的品种有了很大变化,棉、毛、丝、化纤等各种厚薄织物风格不同,因此在加工过程中产生的伸长、收缩及张力等的变化也不同。为了保证加工的质量,对多单元联合机的同步运行,提出了各种要求,发展成了各种拖动形式,其中有共电源的调磁调速、分电源的调更多还原

【Abstract】 In this paper, some problems are discussed about the variable speed regulation by varying the magnetizing flux of the direct current motor. A transfer function between the motor speed and the voltage applied to its field coil is derived from the block digram. It is pointed out that such a variable speed regulation system is more economical for its initial cost but less effective for fluctuating loads.更多还原