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根据异步电动机的机械特性简述其技术问题
According to the mechanical characteristics of asynchronous motor is briefly the technical issues
异步电动机具有布局简略、运转牢靠、价钱低、维护便利等一系列的长处,因
而,异步电动机被广泛应用在电力拖动体系中。尤其是跟着电力电子技能的开
展和沟通调速技能的日益老练,使得异步电动机在调速功用方面大大提高。当
前,异步电动机的电力拖动已被广泛地应用在各个工业电气自动化领域中。就
三相异步电动机的机械特性动身,首要简述电动机的发动,制动、调速等技能
问题。
Asynchronous motor has the layout is brief, reliable operation, low price,
convenient maintenance and so on a series of advantages, therefore, the asynchronous
motor is widely used in electric drive system. Especially with the development of
power electronics skills and communication speed skills has become increasingly
sophisticated, made in asynchronous motor speed control function field is greatly
improved. Currently, the electric power drag of asynchronous motor has been widely
used in various industries in the field of electrical automation. Mechanical
characteristics of three-phase asynchronous motor start, first briefly describes the
launch of the motor, brake, speed skills such as problem.
1 三相异步电动机的机械特性
1 Three-phase asynchronous motor's mechanical properties
三相异步电动机的机械特性是指电动机的转速 n 与电磁转矩 Tem 之间的联
系。因为转速 n 与转差率 S 有必定的对应联系,所以机械特性也常用 Tem=
f(s)的办法表明。三相异步电动机的电磁转矩表达式有三种办法,即物理表
达式、参数表达式和有用表达式。物理表达式反映了异步电动机电磁转矩发生
的物理实质,说明晰电磁转矩是由主磁通和转子有功电流相互作用而发生的。
参数表达式反映了电磁转矩与电源参数及电动机参数之间的联系,使用该式
能够便利地剖析参数改动对电磁转矩的影响和对各种人为特性的影响。有用表
达式简略、便于回忆,是工程核算中常选用的办法。