摘要
频敏变阻器为我国特有的系列产品,但其设计是以实验曲线或经验公式为基础进行的,加之各种不同的电机参数,负荷回异,因而使用中不易获得较佳效果。本文根据电磁场理论导出了管式频敏变阻器的阻抗方程,应用该阻抗方程设计、制造的管式频敏变阻器可获得良好的起动性能。
Being designed on the basis of experimental curves or empirical formulas in addition to different parameters and load of motors, the frequency-sensitive rheostat can hardly result in satisfactory efficiency in operation. According to the electromagnetic field theory, this paper derives an impedance equation for the tubular frequencysensitive rheostat. Application of the equation to the design and manufacture of such rheostats shows satisfatory starting performance.
关键词
频敏变阻器
阻抗方程
管式
frequency-sensitive rheostat
eddy current
Kelvin effect
core impedance
air-gap impedance
