共查询到16条相似文献,搜索用时 171 毫秒
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通过对两种常用的四相开关磁阻电动机(SR)功率变换器主电路的分析,并结合研制实践,给出了5.5kW四相SR新型功率变换器的设计实例和实验结果。 相似文献
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开关磁阻电机(SRM)以其良好的性能得到广泛地应用。其中功率电路是开关磁阻电机调速系统中的重要组成部分。该文针对给定的8/6极SR电机,通过对几种常用功率变换器的结构进行分析,设计了一种优化的结构。文中给出了功率电路及保护电路的具体方案。实践证明,采用该功率电路电机能可靠稳定地运行。 相似文献
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基于开关磁阻电机原理,对智能控制算法在开关磁阻电机中的应用进行研究和改进,将积分分离引入算法中以提高控制性能,对改进算法控制效果进行仿真,与未改进算法进行仿真比较分析;最后以TMS320LF2407 DSP为核心控制芯片、三相不对称半桥电路为SR电机功率变换器主电路控制SR电机,给出实际运行转速波形,并对实验进行了分析... 相似文献
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提出了一种新型SR电动机功率变换器主电路 ,和传统的不对称半桥电路相比较 ,新型电路所使用的主开关器件个数少 ;实现了主开关器件的零电压关断 ,改善了开关性能 ;续流时 ,绕组承受的反向电压可达正向导通电压的 2 5倍 ,从而使续流时间缩短 ,输出转矩增加 ,效率提高 ;利用LC谐振电路使续流时储存在电容中的能量转移到相邻相 ,提高了调速系统的功率因数。本文用非线性磁参数法 ,以 3相 6 / 4极SR电动机为研究对象 ,分别对传统不对称半桥电路和新型电路驱动时的稳态性能 ,进行了仿真研究。 相似文献
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This paper reports on progress made in the operation of switched reluctance machines with simultaneous excitation of multiple phases using just a single current sensor. This avoids individual current sensors in each motor phase, without compromising the drive performance. A new technique for operation of the classic two-transistor-per-phase power converter with only one current sensor is presented, allowing two phases to be excited simultaneously. The detailed operation and implementation of this technique is shown, together with test results and comparisons with normal operation with one current sensor per phase. The paper concludes that adding a very simple electronic circuit to the existing motor control circuitry allows single-current-sensor operation with uncompromised performance. This is the first time a paper discusses the topic of multiphase switched reluctance motor (SRM) excitation using a minimum number of current sensors 相似文献
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A switched reluctance motor requires a power converter circuit to control the unipolar phase current in its phase windings. A converter circuit for a four-phase reluctance motor that uses only four switches is described. Unlike previous circuits with one switch per phase, the switches are created at the motor voltage. Each switch is connected to two of the four phase windings. The switching signals must be carefully derived so that independent control of the phase currents is maintained despite the common connections. Analysis is given to predict the ideal switching algorithm for the converter circuit. This produces the optimum torque at all speeds and currents. Experimental results are given for the performance of the proposed converter circuit as compared with that of other circuits with one switch per phase. It can be seen that for a given supply voltage and peak phase current, the novel converter circuit produces superior torque output from the motor. The low number of switches in the coinverter together with the performance of the four-phase reluctance motor will result in an ideal low-cost variable-speed drive 相似文献
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本文回顾分析了近年来国外学者对SR电动机逆变器的性能计算和设计,从能量流动角度提出估算逆变器开关元件电流额定值的原理,以2.2kW四项双绕组(8/6)SR电机为例阐述了双绕组SR电机逆变器的设计方法。文中还给出了该逆变器运行的测试结果。 相似文献
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