带能量回馈功能的永磁机构驱动控制器

发布时间：2019-04-23 23:23

【摘要】：提出了一种带有能量回馈功能的永磁机构驱动器。首先,针对双线圈单稳态永磁机构断路器分闸时,驱动器的IGBT通电时间短、线圈电感变化小的特点,进行了电路简化,列出电路充放电微分方程,求得解析式;提出了气隙线性变化模型,推导了合闸过程中电感剧烈变化情况下的二阶变系数微分方程,并通过龙格-库塔法和Matlab数学软件,得到了方程的数值解,从而得到电流、电压曲线和能量回收率。然后对重合闸情况下的电容充电时间进行计算,由于能量回馈功能的引入,使得重合闸情况下电容快速充电至分闸允许电压,提高了重合闸可靠性,达到了节约能量和减小充电器功率的目的。同时通过检测分合闸电容电压来控制IGBT导通时间,维持稳定的机械特性。最后结合实验验证了本文设计方法的有效性和适用性。
[Abstract]:A permanent magnet actuator with energy feedback function is proposed. Firstly, the circuit is simplified, the differential equation of charge and discharge of the circuit is listed and the analytical formula is obtained according to the characteristics of short IGBT power-up time and small inductance change of the actuator when the circuit breaker is opened by a single steady-state permanent magnet actuator with a two-wire coil. The linear change model of air gap is put forward, and the second order differential equation with variable coefficient under the condition of drastic change of inductance in the process of closing is derived. By means of Runge-Kutta method and Matlab mathematical software, the numerical solution of the equation is obtained and the current is obtained. Voltage curve and energy recovery. Then the charge time of capacitor in reclosing condition is calculated. Due to the introduction of energy feedback function, the capacitor charging rapidly to the allowable voltage in reclosing condition is made, and the reliability of reclosing is improved, and the reliability of reclosing is improved because of the introduction of energy feedback function. The purpose of saving energy and reducing charger power is achieved. At the same time, the on-off time of IGBT is controlled by detecting the switching capacitor voltage to maintain the stable mechanical characteristics. Finally, the validity and applicability of the design method are verified by experiments.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;
【基金】：国家自然科学基金资助项目(51177004)
【分类号】：TM561

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