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通过建立带阻尼绕组的大功率交-交变频凸极同步电动机的多回路数学模型,研究了在负载突然变化,不同阻尼绕组构、导条根数、阻尼节距时,电动机的功能振荡、阻尼绕组瞬态电流、损耗等情况。结果表明:大功率交-交变频凸极同步电动机应设置成全阻尼绕组,且在极面上阻尼条靠近d轴布置比阻尼条均匀布置要好,电机实际运行情况验证了结论的正确性。 相似文献
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本文研究了由变频器非线性引起的交-交变频器供电的大功率同步电动机系统的谐波问题。重点对稳态运行条件下由定子谐波电压产生的磁势引起的阻尼绕组谐波电流、谐波损耗及脉动转矩进行了计算分析,并以一台5000kW交-交变频大功率同步电动机为例做了实例计算。 相似文献
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用数值积分方法求出了无换向器电机交-交系统稳态运行时同步电动机定子绕组、励磁绕组和阻尼绕组电流波形,并对其谐波问题进行了研究。并作了实例计算。 相似文献
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金炫 《上海电机厂科技情报》2000,(3):19-23
本文简略介绍了由交-直-交负载换相逆变器(LCI)供电的交流调速同步电动机设计的特点,着重叙述谐波的抑制、电磁负荷的选取、阻尼绕组及电抗参数的确定等内容。 相似文献
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阻尼绕组结构形式及结构参数对同步电机交-交变频调速系统特性的影响 总被引:1,自引:0,他引:1
文中,作者首先比较了交-交变频调速同步电机在具有不同结构的阻尼绕组时的特性差异,接着分析了阻尼绕组电气参数对同步电机交-交变领调速系统性能的影响,最后揭示了阻尼绕组电气参数与结构参数的关系,为这类系统中阻尼绕组的设计提供依据。 相似文献
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Junya Matsuki Hisao Taoka Yasuhiro Hayashi Shigeru Iwamoto Akihiro Daikoku 《Electrical Engineering in Japan》2012,180(2):33-42
This paper describes the results of an experimental investigation on the effects of the damper winding of a four‐pole synchronous generator at a synchronous generator transient. It is known from simulations that the damper winding acts effectively under synchronous generator transient conditions. However, experimental proof has not been obtained yet. Thus, experiments on damper effects were conducted using a laboratory‐scale power system. The damper winding of the tested generator consisted of five damper bars for each pole; the number of working damper bars could be changed manually. The damper currents at each bar were measured by a Rogowski coil. FFT analysis was applied to both the damper currents and armature currents under different operating conditions. The relationships between damper currents in the rotor and armature currents in the stator were made clearer than before. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 180(2): 33–42, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21278 相似文献
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若将他励直流电动机输出功率的机理等效为一个与电动机电枢绕组并联网的可变电阻,可以得到他励直流电动机可变电阻型等效电路图。此等效电路图适用于电动机转速的任意变化范围,特别是起动与制动过程中各种特性参数的分析与计算。 相似文献
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The use of AC adjustable-speed drives for rolling mill applications is addressed. AC motor characteristics and how they relate to adjustable-speed mill drives are described. A review of AC motor theory highlighting distinctions between induction and synchronous machines along with comparisons to DC motor performance is included. Constant power speed range performance and limitations, damper winding requirements, and the selection of motor variables such as terminal voltage and frequency are discussed 相似文献
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交交变频同步电动机矢量控制系统已广泛应用于轧钢机主传动,对其控制原理的研究具有重要的意义.依据隐极同步电动机dq轴系和气隙磁链定向的数学模型,对转矩的解偶性和可控性进行了分析,还对阻尼绕组的影响进行了分析,认为阻尼绕组有助于减少动态速降并可稳定动态过渡过程,无阻尼绕组传动系统的转矩解偶、控制方便,但动态时可能发生震荡. 相似文献
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A. I. Korshunov 《Russian Electrical Engineering》2013,84(4):228-235
Sufficient conditions for static stability of a salient-pole synchronous motor are found by two methods. The equivalence of these methods is proved. The synchronous motor is demonstrated to be statically unstable under superconductivity conditions, even if it is equipped with a damper winding. 相似文献
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Improvement of Three‐Phase Unbalance Due to Connection of Dispersed Generator by Damper Windings of Synchronous Generator
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Junya Matsuki Hisao Taoka Yasuhiro Hayashi Shigeru Iwamoto Akihiro Daikoku 《Electrical Engineering in Japan》2014,186(1):43-50
It is well known in the numerical simulations of a synchronous generator that the damper winding contributes to suppressing three‐phase circuit unbalance in power systems. However, an experimental study has not been performed yet. In this paper, we verify experimentally the suppression of three‐phase unbalance by the damper windings. In order to simulate the three‐phase unbalance, a 470‐W dispersed generator of single‐phase two‐line type was connected to a three‐phase laboratory‐scale power system that included a 6‐kVA synchronous generator. We measured and analyzed line voltages and currents as well as damper bar currents both with and without the dispersed generator. The influence of damper windings on the unbalance of the three‐phase circuit was also investigated. The results show that the damper winding contributes to improving the three‐phase unbalance. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 186(1): 43–50, 2014; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22305 相似文献
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根据某地煤矿用同步电动机定子绕组的烧损情况,分析出原因有三:一是电机的绝缘老化,二是绕组的绝缘创伤,三是绕组的积尘受潮.同时介绍了烧损绕组的局部修复处理方法.对重型机械厂同步电动机转子断条的情况进行了分析,其原因是主回路断路器故障.并介绍了转子断条的原地维修方法.另外,还介绍了用毫伏表检测转子励磁绕组接地点的简便方法. 相似文献