Current compensation control strategy for restraining thrust fluctuation of pmlsm 抑制永磁直线电机推力波动的电流补偿控制策略
This paper mainly deals with the design of apf based on harmonic current compensating approaches 本论文重点研究了基于不同谐波电流补偿方法的滤波器的设计。
The coordination control between the angle error and the ratio error was realized through analyzing the common characteristics between the similar magnetizing current compensation and the anti - turn compensation 通过分析相似电流补偿和反匝数补偿的特点,对电流互感器的比差和角差进行了协调控制,补偿效果明显。
A current compensation method is presented and realized , which improve the pull - out performance at half - step mode in wider high frequency range for two phase hybrid stepping motors , and the usable horsepower of the system is also increased 给出一种电流补偿的方法,使得半步方式运行的二相混合式步进电动机和牵出特性在高频运行的一定频段内得以提高,增大了该电动机系统的可用功率。
From the perspective of minimum transmission losses , an instantaneous reactive power theory for systems with any number of phases and with or without neutral line is developed . under the new definition , each quantity has its own physical meaning , and the zero sequence current can be decomposed into active and reactive components . furthermore , a generalized compensation method for zero sequence current is developed 从输电损耗最小的角度出发,提出了任意相无中性线或有中性线系统的瞬时无功功率理论,在新的理论下,每个量都有清晰的物理意义,且能分解出零序电流的有功分量和无功分量,并给出了通用的零序电流补偿方法,揭示了瞬时无功功率理论与传统平均意义下的无功功率理论的联系及本质区别,从而为研究hvdc - vsc及各种facts装置的无功功率控制奠定了理论基础。
The criteria used for adaptive feedforward compensation is introduced , two unbalance compensation ways of permanent magnet biased magnetic bearing based on bearing current minimization are studied , the recursive adaptive algorithm and the unbalance compensation on estimation of synchronous rotate speed are studied , the simulation results are given 在基于零电流补偿原则的基础上,提出基于递归运算的不平衡补偿方案,进行了理论分析和仿真研究;对基于同步转速估算的不平衡补偿方法进行了详细的理论分析,并进行了仿真研究。
The validity and superiority of all these are proved by use the parallel converter of novel upfc to implement reactive current compensation , zero sequence and negative sequence currents compensation , harmonic currents compensation and the mixed compensation of them . this thesis also studies that use novel upfc to implement two phases operating in high - voltage transmission lines by theory analyze and simulation testify 提出了基于多电平变换器的广义大功率有害电流补偿的概念,提出了适合于它的多环定时滞环控制方案,通过用新型upfc的并联变换器实现无功补偿、零序和负序补偿、谐波补偿及它们的综合补偿来验证了其有效性和优越性。