串级调速 [机] cascade speed control ; Cascade adjusting speed ; Cascade control ; Cascade speed regulation
无级调速 step less speed regulating ; stepless speed variation ; stepless timing
分级调速式电动机 change speed motor
无级调速车床 stepless speed regulation lathe
无级调速伺服电动机 stepless servo-motor
有级调速 step speed regulation
变频器闭环无级调速 Closed loop
变频无级调速 frequency stepless governor
无刷串级调速 brushless Scherbius control
串级调速系统 cascade speed regulating system
晶闸管串级调速系统是一种廉价、简易的调速系统，但是传统串调系统存在着诸如功率因数低、谐波污染严重等弊端。
Speed regulation system using cascade control method with thyristor is a low-cost system, but the classic system has some shortages, such as low power factor, serious harmonic pollution and etc.
该方法是通过调节转子回路附加电阻的有级调速，难以实现平滑地调速，而且调节性能差，调速过程中大量的转差功率通过转子回路电阻转化为热能消耗掉了。
This method regulates speed by changing the number of steps of the additional resistor in the rotor circuit, so it's hard to realize smooth speed-regulation, also its performance is poor.
本文论述了可控硅逆变器逆变角影响串级调速装置功率因数的基本原理。
This paper discusses the basic principle which the inverted firing angle of thyristor inverter has the influence on power factor of a cascade connected device.
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