CAJ | 학술논문

在航空变频电源供电下，航空异步电动机在额定状态时或低频供电时存在磁路饱和的现象，一定程度的饱和有利于提高电磁转矩，但是过度饱和将导致电机定子电流出现畸变及谐波，异步电机生成的谐波电流将对飞机供电系统的电能质量产生不利影响。采用一台在115 V/600 Hz电源供电下的鼠笼式异步电机模型进行有限元仿真，分别计算齿部、轭部以及气隙磁密增大情况所产生的电流饱和谐波，分析饱和时的气隙磁密、齿部及轭部磁密，采用傅里叶变换计算饱和电流谐波，从而建立电流谐波分量与不同饱和情况的关系，通过比较三种饱和情况生成的电流谐波分量，提出抑制高次电流谐波的设计思路。
재항공변빈전원공전하，항공이보전동궤재액정상태시혹저빈공전시존재자로포화적현상，일정정도적포화유리우제고전자전구，단시과도포화장도치전궤정자전류출현기변급해파，이보전궤생성적해파전류장대비궤공전계통적전능질양산생불리영향。채용일태재115 V/600 Hz전원공전하적서롱식이보전궤모형진행유한원방진，분별계산치부、액부이급기극자밀증대정황소산생적전류포화해파，분석포화시적기극자밀、치부급액부자밀，채용부리협변환계산포화전류해파，종이건립전류해파분량여불동포화정황적관계，통과비교삼충포화정황생성적전류해파분량，제출억제고차전류해파적설계사로。
Aero induction machines are magnetically saturated when working with aero variable-frequency power.The magnetic saturation of induction machines provide useful magnetic torque while over saturation will result in stator current distortion and accordingly harmonic components.The harmonic current from ma-chines makes negative effect on aircraft distribution power system.A induction machine model , supplied with 115 V/600 Hz, was used for FEA approach to calculate three different saturation current due to saturat-ed teeth, yoke and air gap respectively.By analyzing the flux density of air gap , teeth and yoke, calculating current harmonics with Fourier decomposition , the relation between current harmonic and saturation was built.The current harmonics were compared among three saturation situations.The conclusion suggested the design way to limit high-order current harmonic components.