【摘要】 可调节式脱扣器是断路器系列化产品的重要组成部分,调节特性是评价断路器调节能力的主要依据,也是设计可调节式脱扣器的关键因素。为此以高速直流断路器用磁脱扣器为例,首先计算脱扣器的静态特性和动态特性,获得脱扣器的调节特性曲线,并引入Pearson相关系数定量计算调节特性曲线的线性度。最后从脱扣器的调节范围、调节线性度、调节分度值、易操作性和调节方法复杂度,多个角度评估脱扣器的调节特性,为选择和优化脱扣器的调节方案提供基础依据。结果表明:预设铁核位移(dc),继而连续调节弹簧预压缩量(L0)的调节方案具有方法简单、调节范围大、线性度高的特点,适用于大范围调节脱扣电流的场合;预设L0,继而连续调节dc的方案具有调节分度值低、调节反力小的特点,通过搭配非线性刻度,减小调节误差,可用于微型电机自动调节或调节精度要求较高的场合。更多还原

【Abstract】 Adjustable release is a main component of serialized circuit breakers. The adjustment characteristics of current setting values are very important to evaluate the adjustability of circuit breakers, and have guiding significance to designing and optimizing adjustable releases. To analyze the adjustment characteristics of high speed direct current circuit breakers comprehensively, and to do some base work for choosing and optimizing the adjustment scheme,firstly, we calculated the static and dynamic characteristics of the release with numerical methods. Then, we obtained the adjustment characteristics curves, and adopted the Pearson correlation coefficient to calculate its linearity. Finally, we analyzed the adjustment characteristics in the aspects of adjustment range, linearity, division value, operability, and complexity. The results indicate that the adjustment scheme, which presets the core displacement(dc) then finely regulates the preload length of disc spring group(L0), is simple, and has a large adjustment range and good linearity. It is suitable for applications requiring large adjustment range. As for the other scheme which presets L0 then finely regulates dc, the division value and the counter force are small. Cooperated with nonlinear scale, the adjustment scheme can be improved. It can be used in micro-motor automatic adjustment or applications requiring higher precision.更多还原