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增安型无刷励磁同步电动机是国家“七五”重大技术装备加氢装置配套的关键设备。本文从主体防爆空腔结构的冷却系统设计出发,着重阐述增安型无刷励磁同步电动机的设计特点以及工业运行验证的情况,为我国大型增安型无刷励磁同步电动机的设计、制造提供参考。 相似文献
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针对大功率增安防爆同步电动机,如何按照增安型无刷励磁同步电动机防爆技术要求,以及TAW系列增安型无刷励磁同步电动机技术条件的规定,对型式试验项目中温升试验的方法,作了比较详细的探讨。 相似文献
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阐述了高低压增安型异步电动机及高压增安型无刷励磁同步电动机设计与制造对绝缘系统的要求,并介绍了它们须承受的防爆检查和试验项目,通过这些措施来确保增安型电机的防爆安全性能。 相似文献
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1.前言 加氢装置用增安型无刷励磁间步电动机以下简称“增安型无刷励磁同步电动机”)是国家“七五”重点科研项目,也是配套七套加氢装置的重大技术装备。1987年3月国务院重大技术装备乙烯专项领导小组在七套加氢装置重大技术装备项目的预备安排会上捉出了我国自主开发研制增安型无刷励磁同步电动机的任务,沈阳电机厂承担了TAQW_b 630—350-201000kW6kV20级增安型无刷励磁同步电动机的设计研制任务,配套茂名石油工业公司炼油厂40万t/年催化加氢柴油精制和40万t/年催化加氢汽油重整两套加氢装置。 相似文献
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以一台为国外压缩机配套的TZYW/TAW7800-18/3250WTHF1正压外壳/增安型无刷励磁同步电动机为例,叙述了正压外壳/增安型无刷励磁同步电动机的防爆优越性,介绍了单支撑同步电机的设计关键点,以及与同类电机相比后该类电机的优势。 相似文献
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分析了逆变器驱动电机系统中的共模电压、高频情况下电机内部的共模耦合通道以及共模电压在这些通道中产生的共模电流。详细分析了系统在不同接地情况下的共模电流的流向及其防护。电机双端轴承绝缘并且电机轴碳刷接地,可构成对轴承电流的最佳防护。 相似文献
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逆变器驱动电机系统中不同接地情况下的共模耦合电流路径 总被引:1,自引:0,他引:1
分析了逆变器驱动电机系统中的共模电压、高频情况下电机内部的共模耦合通道以及共模电压在这些通道中产生的共模电流。详细分析了系统在不同接地情况下的共模电流的流向及其防护。电机双端轴承绝缘并且电机轴碳刷接地,可构成对轴承电流的最佳防护。 相似文献
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Bearing currents and shaft voltages of an induction motor are measured under hard- and soft-switching inverter excitation. The objective is to investigate whether the soft-switching technologies can provide solutions for reducing the bearing currents and shaft voltages. Two of the prevailing soft-switching inverters, the resonant DC-link inverter and the quasi-resonant DC-link inverter, are tested. The results are compared with those obtained using the conventional hard-switching inverter. To ensure objective comparisons between the soft- and hard-switching inverters, all inverters were configured identically and drove the same induction motor under the same operating conditions when the test data were collected. An insightful explanation of the experimental results is also provided to help understand the mechanisms of bearing currents and shaft voltages produced in the inverter drives. Consistency between the bearing current theory and the experimental results has been demonstrated. Conclusions are then drawn regarding the effectiveness of the soft-switching technologies as a solution to the bearing current and shaft voltage problems 相似文献
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变频技术对交流电动机轴电流的影响与预防 总被引:2,自引:0,他引:2
阐述了变频电源中的高频谐波增大了大中型电机的轴电流,分析了高频轴电流的产生机理,提供了轴电流烧损轴承的判断方法.为减少轴电流的危害,提出了转轴绝缘、轴承绝缘和均衡接地电压等防止变频电动机轴电流危害的具体措施. 相似文献
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变频电源中的高频谐波增大了大中型电机的轴电流。分析了高频轴电流的产生机理,提供了轴电流烧损轴承的判断方法。为减少轴电流的危害,提出了转轴绝缘、轴承绝缘和均衡接地电压等防止变频电动机轴电流危害的具体措施。 相似文献
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Naik R. Nondahl T.A. Melfi M.J. Schiferl R. Jian-She Wang 《Industry Applications, IEEE Transactions on》2003,39(5):1294-1299
The development of high-frequency pulsewidth-modulation-based adjustable-speed drives (ASDs) has increased the efficiency, performance, and controllability in induction motor applications. However, the high switching frequencies and the faster switching times of insulated gate bipolar transistors (the device of choice in these ASDs) introduce disadvantages like overvoltages at the motor terminals when long cables are used between the drive and the motor. Another industry-wide concern is the generation of rotor shaft voltage and the resulting bearing current. The grease film in a bearing acts as a capacitor that charges due to the transitions in the common-mode voltage imposed at the motor terminals by the drive. The breakdown of the film causes a spike of current to flow that can damage the bearing and reduce life. A significant amount of effort has been directed at understanding the shaft voltage phenomenon and the associated bearing current. This paper attempts to develop circuit models to predict the level of the shaft voltage. The circuit models can then be used to predict the shaft voltage levels at different installations, using simulation software like PSpice. Circuit models for two specific motors are developed. The predicted shaft voltage is very close to the actual voltage levels seen on the shaft when the motors are operated by ASDs. 相似文献
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阐述了隔爆型振动源三相异步电动机在设计中所关注的一系列问题,重点介绍了隔爆型振动源三相异步电动机的参数、外壳结构、接线盒设计、电磁设计、轴承装配结构、绕组绝缘、激振力的计算和偏心块的确定及振动电机过热保护情况.在保证振动电机隔爆性能的前提下,产生最大的激振力、提高产品的可靠性和安全性. 相似文献
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介绍了TAW8800—20/3250增安型无刷励磁同步电动机的研制过程,重点介绍了为保证电动机防爆性能和电气性能先进、运行安全可靠、维修方便等采取的措施。对该电机的性能指标、创新性及技术经济性进行了分析。 相似文献