绕组比

The brushless permanent magnet automobile a. c. generator has the advantages of high reliability, long service life, high efficiency, good performance at both low and high speed, low radio interference, simplifying its associated voltage regulator, cutting down materials, technology simplified, as well as high power/weight ratio, etc.,and will be a new product with broad prospects and large market.

无刷永磁汽车交流发电机由于取消了碳刷、滑环及励磁绕组，可大大提高可靠性，延长使用寿命，具有效率高，低、高速性能好、无线电干扰小，与之匹配的电压调节器结构简单、节约原材料、工艺性能好、比功大等优点。

The main circuit of the direct voltage type SVC consists of the autotransformer with average voltage, fixed branch which can compensate the reactive power and filter the harmonic, dynamic branch which can compensate the reactive power and filter the harmonic, capacitive AC thyristor no contact switch and the measuring and controlling system of

自耦均压变压器作为SVC中的主要器件，本文通过变压器的短路试验以及编程进行多项式拟合，建立了其漏抗随电容器组投切级数变化的数学模型，进而做了自耦均压变压器与相同容量相同变比的双绕组变压器有功损耗的比较，分析了36抽头自耦均压变压器在一组电容器全部投运时的空载特性，并对SVC的静态性能进行了全面分析。

The average coupling coefficient was put forward,which is the average of every single secondary coil's coefficient.

重点研究了平均耦合系数与磁芯纵横比、半径比、初级绕组-磁芯长度比、磁芯材料磁导率的相对变化关系。

In the split-phase motor, the startup winding is designed with a higher resistance than the running winding.

在分相式电机里，设计启动绕组的电阻要比运行绕组的电阻大。

To evaluate the severity of damage and identify the damaged winding s, this paper presents a method that uses the comprehensive information, including the value and waveform of the fault current, insulation resistance, oil-dissolved gas analysis, winding resistance, turns ratio, deformation detection, and it is of significance to the fault elimination.

介绍了综合利用短路电流值和波形、绝缘电阻、色谱、直流电阻、变压比、绕组变形等资料和手段判断大型变压器低压侧出口短路事故的严重程度、被损坏绕组的相别，为故障的处理提供参考。

Then detailedly introduces the principle of pole-changing modulating speed and design feature in times pole proportion and non times pole proportion in the Mixed pole-changing simplex winding multispeed asynchronous motor , carry on discuss to the main parts of electrical machinery electromagnetism computation; by using VISUAL BASIC under WINDOWS platform for computer-aided design method for the mixed pole-changing simplex winding multispeed asynchronous machine, carries on profound analysis for the computer-aided design in the following aspect such as rotor and setting flush piece size, groove shape size, the rotor and setting winding connection, and start performance.

本文在介绍了单绕组多速电动机的概况，阐述了目前多速电机的发展现状与前景；利用槽号相位图以及混相原理对变极绕组进行了研究，确定了绕组的混相方案；并详细地介绍了混相变极单绕组多速电机在倍极比与非倍极比时的变极调速原理以及设计特点；对电机电磁计算的主要几个部分进行了讨论；介绍了使用WINDOWS平台下的VISUAL BASIC对混相变极单绕组多速异步电机的计算机辅助设计方法，对混相变极单绕组多速异步电机的定转子冲片尺寸、槽形尺寸、定转子绕组接法、定转子相带、起动性能的几个方面的计算机辅助计算进行了深刻分析；最后，对混相变极单绕组多速异步电机的样机检测试验结果进行了分析。

In this paper, arrangement scheme of a novel multi-star phase shifted pole changing coil was given and the methods to determine coil split ratio were analyzed. According to electromagnetic theory, 2D electromagnetic mathematical model in which stator windings were spitted coil was developed, and magnetic field distribution of the novel motor at starting was solved by finite element method, starting performance of motor was calculated. Based on energy method, rotor slot leakage reactance under different poles and different loads were calculated, and the variation of rotor slot leakage reactance with loads was gotten. Based on time-step finite element method, distribution of branch current in stator windings and operating performance were calculated and analyzed when branch was unbalance, the method to calculate circulating loss in stator windings of novel multi-star phase shifted pole changing motor was given, and the effects of the loads variation and degree of unequilibrium on circulating loss in stator windings were calculated and analyzed.

论文系统的给出了采用分裂线圈法新型多星形移相变极绕组的排列方案，进一步分析线圈分裂比的确定方法；根据电磁场理论，建立了定子为分裂线圈绕组的电机二维电磁场数学模型，并采用场路耦合法求解了新型多星形移相变极电机起动时的磁场分布，计算了电机起动性能和基于能量法计算了不同极数下起动时转子槽漏抗和不同负载时转子槽漏抗，得出转子槽漏抗随负载变化的规律；采用时步有限元法计算分析了定子绕组支路不平衡时支路电流的分布情况及运行性能，给出了新型多星形移相变极电机定子绕组环流损耗的计算方法，分析比较了负载的变化和支路不平衡度大小对定子绕组环流损耗的影响。

The windings in the valve side adopt prolonged delta connection providing the circuit for three-multiple harmonic currents, and implementing 12-pulse converter through fit ratio; this connection between the common winding and prolonged winding can decrease the current impact when phase conversion takes place.

该换流变压器阀侧绕组采用延边三角形接线，为3倍次谐波电流提供通路；通过匝比配合，实现12脉波换流；其延边绕组与公共绕组构成自耦变压器接线，可减少换流器换向时的电流冲击；在公共绕组上连接滤波支路，并调至谐振点，配之以变压器巧妙的零阻抗设计，可以在阀侧实现无功补偿，可实现网侧绕组中无5、7、11、13次特征谐波，即谐波屏蔽。

The deterioration of voltage ratio may result in damage of transformer, which may also lead to the failures of power supply system.

变压比是变压器的重要参数，变压比的变化与变压器绕组的变化有密切的关系。

The deterioration of voltage ratio may result in damage of transformer, which may also lead to the failures of the power supply system.

变压比是变压器的重要参数，变压比的变化与变压器绕组的变化有密切的关系。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。