以下为句子列表：
英文: Abstract: In this paper, by numerical simulation, studied is the determination of eddy-current for the purpose of exciting magnetism of eddy-current coupling drive in the starting process of pump.
中文: 文摘:根据电磁调速电动机驱动的水泵机组起动过程中的力矩平衡方程，得到水泵转速的变化率与水泵转速和励磁电流的函数关系式，据此进行数值模拟。
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英文: Each of them consists of a three-phase asynchronous motor,an eddy-current coupling and a tachogenerator.
中文: 是一种控制简单、具有测速负反馈系统的交流恒转矩无级调速电动机，能在较宽的转速范围内进行平滑的无级调速。
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