... additional condenser 附加电容器 additional resistor 附加电阻器 additional roller table 延长辊道 ...
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additional l resistor 附加电阻器
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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.
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。
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