When changing diaphragms in most drivers the new diaphragm may not be 100% concentric to the old one, and the only way to align it in the magnetic gap is by removing the iron pole from the driver and loosening the screws holding the center pole piece, then and only then the diaphragm can be aligned with the center pole piece and rubbing or touching of the voice coil with the pole pieces in the gap is avoided, this may happen at certain frequencies only, producing a very harsh sound, even passing a static or a dc diaphragm test, therefore the claim that the diaphragms are replaceable in the field is not in many cases true, only when the driver has adjustable screw and dowel locating pin the alignment is possible without getting inside the driver and when alignment of the diaphragm is needed, the plate holding the pole pieces and assembly needs removal, by doing so the pole piece may be well set and aligned but the magnetic field will weaken significantly by such a procedure and solving one problem leads to another one, in this case the driver needs to be re magnetized in order to perform well.
当改变隔膜在大多数司机的新膜片不得100 ％同心旧的，只有这样，才能使其在磁场的差距是通过消除铁柱从司机和松动的螺丝中心柱举行一块，然后才是膈肌可配合中心极片和摩擦或触摸的音圈与极片的差距是可以避免的，可能会遇到这种情况只有在特定的频率，产生了非常严厉的声音，甚至通过一个静态或直流隔膜测试，因此声称隔膜的更换在外地不是在许多情况下，真实的，只有当该名司机已可调螺丝和销子定位销调整是有可能没有得到内部的驱动器和调整时，膈肌是必要的，举行的板极件和大会需要搬迁，这样做极可能是一块很好设置和调整，但磁场将削弱显着这样的程序和解决的一个问题导致另一次，在这种情况下，司机必须重新磁化，以表现良好。
By changing the connection of stator windings to change the pole number, the Mixed pole-changing simplex winding multispeed asynchronous motor can obtain two kinds or above rotational speeds with one set of winding.
混相变极的单绕组多速异步电动机是利用改变定子绕组的接法，以改变电机的极数，从而使电机用一套绕组获得两种或两种以上转速的异步电动机。
For the purpose of making use of slot phase diagram s in the analysis of a pole-changing winding, the phase diagram s are divided into two types according to whether or not the negative slot numbers are included in the phase diagram s.
在研究采用槽号相位图分析变极绕组时，将相位图按是否含负槽号分为两类，并分别指定了变前极基准方案。
The solution and algorithm of reverse current pole changing on the symmetrical block diagram and GA optimizing model are developed.
基于变极绕组设计的对称块图法和遗传优化算法反向法变极的数学模型，提出了具体的求解方法及算法，给出了详细的计算流程图，研制了相应的计算机软件，实现了变极绕组设计的计算机自动化，实例证明了理论及方法的实用性及先进性。
Through the analysis of salt-affected soil and effect of dispersion after changing the content of salt-affected thing, we conclude that using the soil block test, pin pole test is effective for assessing the dispersion because of affecting by high sodium ion.
通过研究分析盐渍土及改变盐渍含量对分散性试验的影响，认为土块试验、针孔试验对受高钠离子影响的盐渍土分散性评价是较为有效的方法。
Based on condition of AC contactor no adding attachment, no using assistant contact, no changing work route, application range, dimension, maintaining method and reciprocation, it was validated that gap was reduced, pole surface was enlarged, bump, noise and contact bounce were avoided by changing pole surface shape, with electric energy saving and improving product level.
在交流接触器不增加附加装置，不占用辅助触头，不改变工作行程、使用范围、安装尺寸、维护方法和互换性等先决条件下，论证了通过铁心极面形状的变更使工作气隙缩小，极面增大，消除撞击、噪音和触头弹跳，从而实现电耗与静态吸力、闭合速度与振动、温升与体积、寿命与材质、可靠性与成本统一。
On the basis of the operating characteristics of specific pole changing adjustable speed induction motor for tower crane, the relevant problems about energy saving design are discussed, and design measure of improving energy saving effect is presented.
根据塔机专用变极调速感应电动机的运行特点，对其节能设计的有关问题进行探讨，并提出了提高节能设计的设计措施。
This paper uses 72 slots 4/32 poles as an example to propose a two_ layer winding design of pole_changing alternating curren machine with far pole ratio.
以72槽4/32极绕组为例提出了利用双层绕组设计远极比变极交流电机的方法。
On the basis of a comparative analysis of various pole-changing and speed-adjusting schemes for marine AC three-speed winch motors, the paper presents a new design adopting a patent method which changes pole by changing the unit ampere conductor.
本文在分析比较船用交流三速起货机电动机变极调速方案的基础上，提出采用专利安导元变极法改进设计，从而在原机座基础上使电动机输出功率提高、运行性能改善。
The Similarities and Differences of High voltage Heat Changing Resistance Type Starter and Liquid Resistance Starter of Moving Pole Plate for Changing Resistance
高压热变阻式与动极变阻式液体电阻起动器的异同
Using Two Pole - pair Slot - number Phase Graph to Design Two-layer Pole - changing Windings with Far Pole Ratio
用双极对槽号相位图设计双层远极比变极绕组
Results show that the highest place of flux density is superposition of armature and guide sleeve end of pole piece, and the changing for pole piece inside diameter unilateral gap settle on the thrust characteristic.
通过可视化模拟和分析得知，磁通密度最高的地方是衔铁与极靴导套端重叠部分，极靴内径单侧间隙的变化对吸力起决定作用。
Usage and Maintenance of Piston Pump for Hydraulic Positive Pole Changing Device
全液压更换阳极装置柱塞泵的使用与维修
The non-uniform condition of the branch current in the armature winding and the matching with magnetic potential in the commutating pole are improved by means of changing the connection of commutating pole winding.
通过改变直流电机换向极绕组接线方式，改善了电枢绕组支路电流的不均衡状态及其与换向极磁势的匹配关系。
This paper introduces the PLC that applied to the automatic pole electromagnetic slipping clutch speed regulating system. And designed the PLC hardware system and control program of automatic pole changing electromotor.
本文介绍了PLC对自动换极的电磁转差离合器调速系统的控制，设计了电动机自动换极调速的PLC硬件系统和控制程序。
The new machine has a p/qpole wound-rotor changing-pole winding which is repeatedly used in p or q pole-pair numbers, therefore it has higher rotor conductor availability ratio and low harmonic content.
这种新型绕组利用其中两种不同极对数p和q对应感应电势在理论上可以有不同电回路的特点，对转子导体进行重复利用，从而具有较高的利用率和低的谐波含量。
Then the speed regulating pole change motor is designed based on the pole-changing principle.
根据变极原理设计了螺杆泵用变极调速电动机。
A new algorithm has developed which is based on GA and twin pole pairs slot number phase diagram Symmetrical block diagram method, and given the description of its mathematical model for reverse current pole changing winding.
基于变极绕组设计的双极对数槽号相位图和对称块图法，讨论了变极绕组设计的数学模型。
By using it the variable-pole motor's winding is equivalent to full-pitch-winding, whether the motor's pole changing or not.
用此原理设计的变极绕组，无论变极前后都等效于整距绕组。
A Study of the Wave Form Coefficients and the Pole Arc Flux Coefficients of Pole-changing Salient Pole Synchronous Machines (ⅱ)
变极凸极同步电机波形系数和极弧磁通系数的研究（Ⅱ）