外文文獻(xiàn)及翻譯--三相異步電動(dòng)機(jī)的幾種調(diào)速方式-其他專業(yè)-資料下載頁(yè)
2025-01-19 08:58本頁(yè)面
【導(dǎo)讀】從上式可見，改變供電頻率f、電動(dòng)機(jī)的極對(duì)數(shù)p及轉(zhuǎn)差率s均可太到改變轉(zhuǎn)速的目的。速、斬波調(diào)速、串級(jí)調(diào)速以及應(yīng)用電磁轉(zhuǎn)差離合器、液力偶合器、油膜離合器等調(diào)速。耗在液力偶合器的油中。量損耗是很小的。串級(jí)調(diào)速是指繞線式電動(dòng)機(jī)轉(zhuǎn)子回路中串入可調(diào)節(jié)的附加電勢(shì)來改變電動(dòng)機(jī)的轉(zhuǎn)差，為了擴(kuò)大調(diào)速范圍，調(diào)壓調(diào)速應(yīng)采用轉(zhuǎn)子電阻值大的籠型電動(dòng)機(jī)，如專。晶閘管調(diào)壓方式為最佳。直流勵(lì)磁電源功率較小，通常由單相半波或全波晶閘管整流器組成，改變晶閘管的導(dǎo)通。電樞與電動(dòng)機(jī)轉(zhuǎn)子同軸聯(lián)接稱主動(dòng)部分，由電動(dòng)機(jī)帶動(dòng)；磁極用聯(lián)軸節(jié)與負(fù)載
【正文】 ical contact, are free to rotate. Armature motor coaxial connection active part, driven by motors。 docking with the load axis magic pole coupling from the moving parts. When the armature poles are at rest, such as excitation windings for DC, along the circumferential surface will form a number of air gap on the n, s, of alternating polarity poles, the magic flux through the armature. Dang electric armature with drag motor rotating Shi, due to electric armature and pole between relative movement, and makes electric armature induction produced Eddy, this Eddy and magic pass mutual role produced go moments, led has pole of rotor by same direction rotating, but its speed constant below electric armature of speed N1, this is a go difference adjustable speed way, changes go difference clutch device of DC Lai magic current, will can change clutch device of output go moments and speed. Characteristics of electromagic speed regulating motor speed: Appliances, structure and control circuit is simple, reliable operation, easy maintenance。 speed and smooth, stepless speed regulation The power work harmonic effects。 Lost speed, low efficiency. This method applies to medium and small power, requires low speed when the smooth, short 7 run production machinery. 7. Hydraulic Coupler Speed Regulation Method The hydraulic coupler speed regulating hydraulic Coupler is a device for hydraulic drive, is made up of the pump and turbine, they collectively work wheels, placed in a sealed case. Shell filled with a certain amount of working fluid, when pump is impulse driven by rotation, in which liquid propelled by blades which rotate, and under the action of centrifugal force along the outer wheels when entering the turbine pump, to thrust to the turbine blades on the same turn, make it drive production machinery running. Power transfer capacity of the hydraulic coupler and shell filled with fluid volume sizes are consistent. In the course of work, changing the filling rate can change the coupler of turbine speed, stepless speed regulation, characterized by: Power scope, can meet the needs of from a couple of different power 10kilowatt to shuqianqian。 Simple structure, reliable performance, easy to operation and maintenance, and low cost。 Small size, capacity。 Easy to adjust, easy to fulfill automatic control. This method applies to the speed of the fan and water pump.
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