中文摘要：

针对串励电动机调速系统存在的轻载转速高,空载时会产生“飞速”的缺陷,提出一种变转速负反馈系数的间接测速的串励电动机轻载降速控制方法.通过对系统的静态和线性化动态分析,给出了确保系统稳定的设计约束条件.应用表明,采用该控制方法能稳定有效地降低系统的轻载转速,而系统正常运行时仍保持具有串励电动机的特性.

英文摘要：

The performance of the series-excited motor speed-control system has some defects, such as overspeedwhen working in light-load or no-load condition. Addressing this problem,a deceleration strategy of the series-excited mo-tor system with variable speed feedback based on indirect speed mesurement was proposed. Through steady-state and line-arized dynamic analysis for the series-excited motor speed-adjusting drive system, the conditions and methods for designingthis deceleration strategy system based on indirect speed mesurement to ensure system oprating stablely was clarified. Tak-ing a series-excited motor speed driving system as an example, the series-excited motor＇s soft mechanical characteristic isretained under normal operation and the speed decreases significantly in light-load condition.