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标题：液压抵消开关磁阻电机径向电磁力的可行性研究 |
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作者：栾茹，邓冉冉，祁新春 |
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| 2017年第11期 访问次数：385次 |
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摘要：开关磁阻电机的振动问题来自于其结构本体及运行原理，在径向电磁力作用下引发振动，而运用麦克斯韦应力法可以建立测量该径向电磁力密度的方法，根据一台2KW 、12/8极SRM的结构尺寸制作了局部模型，模拟在轻载与满载时的运行工况，测量了该模型3个典型位置处的径向电磁力密度，再测量该模型浸泡在蒸发冷却介质中的液体压强，结果表明两者可以相互抵消。在此基础上提出用蒸发冷却液体介质浸泡整个定子，针对一具体SREM参数，分别就常规结构与定子灌入蒸发冷却介质的结构，运用有限元数值计算仿真软件进行瞬态电磁场与瞬态结构场的耦合计算，得到该两种开关磁阻电机结构的振动速度计算结果，经过比较表明液压可以削弱径向电磁力。
Abstract: Vibration in switched reluctance motor arises from its structure and running principle. The stator radial electromagnetic force cause its shell vibrating. So it is important to know the stator radial electromagnetic force. Utilizing Maxwell stress method, established the expression of computing the radial electromagnetic force using tangential component and normal component of magnetic flux density. According to the structure size of a 5 kW,12/8 switched reluctance motor, made an experiment model to survey tangential component and normal component of magnetic flux density, and to ascertain the radial electromagnetic force density. Meanwhile measured the hydraulic pressure on the experiment model when it was marinated into an evaporative cooling medium. The results show that the whole stator core and windings are sealed up forming a tight space and a kind of evaporative cooling medium is poured into the stator sealing space, and the whole stator is soaked by the evaporative cooling medium that can flow. According to the specific switched reluctance motor parameters, calculations of transient electromagnetic field coupling transient structure field by finite element numerical simulation software were finished for conventional structure and evaporative cooling stator structure respectively. Calculation results of the vibration velocity of the two structures were obtained. The results comparison shows that the hydraulic pressure can decrease the value of radial electromagnetic force.
Key words: switched reluctance motor; vibration; stator structure; radial electromagnetic force; evaporative cooling
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