ABB UFC760BE1142 3BHE0Q4573R1142

abb ufc760be1142 3bhe0q4573r1142

abb电机，俗称“马达”，是指依据电磁感应定律实现电能的转换或传递的一种电磁装置。电动机也称(俗称马达)，在电路中用字母“m”(旧标准用“d”)表示。它的主要作用是产生驱动转矩，作为用电器或各种机械的动力源，发电机在电路中用字母“g”表示。

变压器是一种静止电机，它应用电磁感应原理，可将一种电压的电能转换为另一种电压的电能(一般是交流电)。从电力的生产、输送、分配到各用电户，采用着各式各样的变压器。首先，从电力系统来讲，变压器就是一种主要设备。我们知道，要将大功率的电能输送到很远的地方去，再用较低的电压即相应的大电流来传输是不可能的。这是由于:一方面大电流将在输电线上引起大的功率损耗另一方面，大电流还将在输电线上引起较大的电压降落，致使电能根本送不出去。为此，需要变压器来将发电机的端电压升高，相应的电流便可减小变压器的简介 变压器的功能主要有: 电压变换，电流变换，阻抗变换;隔离;稳压《磁饱和变压器);自变压器;高压变压器(干式和油漫式)等，变压器常用的铁芯形状一般有e 型和c型铁芯，xed 型，ed 型 cd 型。 变压器按用途可以分为 配电变压器、电力变压器、全密封变压器、组合式变压器、干式变压器、 单相变压器、电炉变压器、整流变压器、电抗器、抗干扰变压器、防雷变压器、箱式变电器 试验变压器转角变压器 大电流变压器励磁变压器。变压器的zui基本型式，包括两组绕有导线之线圈，并且彼此以电感方式称合一起。当一交流电流(具有某一已知频率)流于其中之一组线圈时，于另一组线圈中将感应出具有相同频率之交流电压，而感应的电压大小取决于两线圈耦合及磁交链之程度一般指连接交流电源的线圈称之为[一次线圈](primarycoi1);而跨于此线圈的电压称之为[一次电压.]。在二次线圈的感应电压可能大于或小于一次电压，是由一次线圈与二次线圈间的[匝数比]所决定的。因此，变压器区分为升压与降压变压器两种。大部份的变压器均有固定的铁芯，其上绕有一次与二次的线圈。基于铁材的高导磁性，大部份磁通量局限在铁芯里，因此，两组线圈藉此可以获得相当高程度之磁耦合。在一些变压器中，线圈与铁芯二者间紧密地结合，其一次与二次电压的比值几乎与二者之线圈匝数比相同。因此，变压器之匝数比，一般可作为变压器升压或降压的参考指标。由于此项升压与降压的功能，使得变压器已成为现代化电力系统之一重要附属物，提升输电电压使得长途输送电力更为经济至于降压变压器，它使得电力运用方面更加多元化，可以这样说，没有变压器，现代工业实无法达到目前发展的现况。电子变压器除了体积较小外，在电力变压器与电子变压器二者之间，并没有明确的分界线。一般提供 60hz电力网络之电源均非常庞大，它可能是涵盖有半个洲地区那般大的容量。电子装置的电力限制，通常受限于整流、放大，与系统其它组件的能力，其中有些部份属放大电力者，但如与电力系统发电能力相比较，它仍然归属于小电力之范围。

abb motor, commonly known as "motor", refers to anelectromagnetic device that converts or transmits electrical energybased on the law of electromagnetic induction. electric motors,also known as motors, are represented by the letter "m" (formerlyknown as "d" in the standard) in circuits. its main function is togenerate driving torque, which serves as a power source forelectrical appliances or various machinery. the generator isrepresented by the letter "g" in the circuit.

a transformer is a static motor that applies the principle ofelectromagnetic induction and can convert electrical energy fromone voltage to another voltage (usually ac). from the production,transmission, and distribution of electricity to various consumers,various transformers are used. firstly, from the perspective of thepower system, transformers are a major type of e we knowthat it is impossible to transmit high-power electrical energy todistant places with a lower voltage or corresponding high current.this is because: on the one hand, high current will causesignificant power loss on the transmission line, and on the otherhand, high current will also cause significant voltage drop on thetransmission line, resulting in the inability to deliverelectricity at all. for this reason, a transformer is needed toincrease the terminal voltage of the generator, and thecorresponding current can be reduced. the main functions of atransformer include voltage transformation, current transformation,and impedance transformation; isolation; stabilized voltage(magnetic saturation transformer); self transformer; high-voltagetransformer (dry type and oil diffuse type) the commonly used ironcore shapes for transformers include e-type and c-type iron cores,xed type, and ed type cd type. transformers can be divided intodistribution transformers, power transformers, fully sealedtransformers, combination transformers, dry transformers,single-phase transformers, furnace transformers, rectifiertransformers, reactors, anti-interference transformers, lightningprotection transformers, box type transformer test transformers,corner transformers, high current transformer excitationtransformers according to their usage. the most basic type oftransformer consists of two sets of coils wound with wires, whichare inductively combined with each other. when an ac current (witha certain known frequency) flows into one of the coils, an acvoltage with the same frequency will be induced in the other groupof coils, and the magnitude of the induced voltage depends on thedegree of coupling and magnetic flux linkage between the two coils.generally, the coil connected to the ac power supply is called theprimary coil; the voltage across this coil is called the primaryvoltage. the induced voltage in the secondary coil may be greateror less than the primary voltage, which is determined by the turnratio between the primary coil and the secondary coil. therefore,transformers can be divided into two types: step-up and step-downtransformers. most transformers have fixed iron cores with primaryand secondary coils wound around them. based on the highconductivity of iron material, most of the magnetic flux is limitedto the iron core, therefore, two sets of coils can achieve aconsiderable degree of magnetic coupling through this. in sometransformers, the coil and iron core are tightly bonded, and theratio of the primary to secondary voltage is almost the same as theratio of the turns of the two coils. therefore, the turn ratio of atransformer can generally be used as a reference indicator forboosting or reducing voltage in transformers. due to the functionof boosting and reducing voltage, transformers have become animportant accessory of modern power systems. increasingtransmission voltage makes long-distance power transmission moreeconomical. as for step-down transformers, they make powerapplications more diversified. it can be said that withouttransformers, modern industry cannot achieve the currentdevelopment status. there is no clear boundary between powertransformers and electronic transformers, except for their smallsize. the power supply of a 60hz power network is generally verylarge, and it may cover a capacity as large as half a continent.the power limitation of electronic devices is usually limited bythe ability of rectification, amplification, and other componentsof the system, some of which belong to the power amplificationcategory. however, compared to the power generation capacity of thepower system, it still belongs to the scope of small power.