永磁同步发电机的设计与磁场项目设计方案 下载本文

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图4-1 定子槽型

bs1?0.72cm,bs2?0.86cm,bs0?0.35cm,hs1?0.13cm,hs2?0.8cmD1?Di1b?(hs1?hs2?s2)3222?14.6??(0.13?0.8?0.86)?2.483cm32?Di13.14?14.6t???1.273cmQ36hj?bt?

??Di1?2hs1?Q?bs1?3.14??14.6?2?0.13??0.68?0.616cm36(56)槽满率:

槽面积

bs2?bs1?bs22As?hs2?28 20.86?0.723.14?0.68??0.8??0.813cm228槽绝缘占面积:

?b??Ai?Ci?2hs2?s2?bs2?bs1?2????0.86???0.03?2?0.8??0.86?0.72?2???0.136cm2Cj?槽绝缘厚度,取0.03cm槽有效面积:Aef=As?Ai?0.813?0.136?0.6775cm2槽满率:NS16???????Sf=scu?100%?????????????Aef0.6775

4.5 磁路计算

(57)计算空载磁通:

?E0254 ????13.2?10?3Wb

4.44fNKdpK?4.44?50?96?0.9404?0.96??0(58)计算极弧系数(均匀气隙): ?i??p?4?6??1??p?0.82?4?????6????1?0.82?0.8643

(59)铁心有效长度(定,转子轴向长度相等): lef?L1?2??17?2?0.2?17.4cm (60)气隙磁密:

???013.2?10?34 B???10??0.77T

?i?lef0.8643?11.39?17.4(61)气隙系数: K??t(4.4??0.75bs0)1.273?(4.4?0.2?0.75?0.35)??1.092 22t(4.4??0.75bs0)?bs01.273?(4.4?0.2?0.75?0.35)?0.35(62)气隙磁位差: F??2B????2?0.77?0.2?1.092?10?2??10?2?2677.83A ?7?0????10(63)定子齿磁密: Bt?B?tlefbtKFeL1?0.77?1.273?17.4?1.714T

0.616?0.95?17(64)定子齿磁位差:

Ft?2Htht?2?115.2?1.073?247.22A Ht取115.2A?cm ht取1.073 (65)定子轭磁密:

???013.2?10?3?104 Bj???1.646T

2L1KFehj2?17?0.95??????(66)定子轭磁位差:

Fj?2CjHjlj?2?0.32?42.1?7.66?206.39A Hj-定子轭磁场强度取42.1A?cm

Cj-考虑轭部磁通密度不均匀而引入的轭部磁路长度校正系数,取0.32

lj-定子轭磁路计算长度: lj???D1?hj?4p?0????22?2.483?4?2?7.66cm

(67)极靴平均磁密: Bp????1????02?p?Lp?104??????1??13.2?10?3???104?0.94T 2?0.77?11.39?17 Lp-极靴轴向长度17cm

(68)极靴磁位差:

Fp?2Hplp?2?1.063?4.8?10.205A Hp查表取1.063A??cm lp取4.8cm

(69)磁性衬套平均磁密:对于切向式结构,Bh?0T (70)磁性衬套磁位差: Fh?2Hhlh?0A (71)总磁位差:

?F?F?F?F?tj?Fp?Fh ?2677.83?247.2?206.39?10.205

?3141.625A(72)主磁导:

???013.2?10?3 ?????4.2016?10?6H

?F3141.625????? 主磁导标幺值:

hmp?r?0Am?102

4.2016?10?6?2?4.1566?71.052?4?3.14?10?153(73)漏磁导(利用电磁计算而得到): ???0.389?10?6H 漏磁导标幺值: ?????hmp?r?0Am?102?0.389?10?6?22?10?0.3848 ?71.052?4??10?153(74)外磁路总磁导:

?n???????4.2016?10?6?0.389?10?6?4.5906?10?6H 外磁路总磁导标幺值:

?n???????4.1446?0.3848?4.5294

(75)永磁体空载工作点:

bm0??m0??n4.5294??0.8191?n?14.5294?111??0.18085?n?1???????1

hm0?fm0?

(76)空载漏磁系数: ?0?bm00.8191??1.19285

bmo?hm0??0.8191?0.18085?0.3848(77)空载气隙磁通:

??0??bm0?hm0???BrAm?10?4 ??0.8191?0.18085?0.3848??1.132?153?10?4

?12.981?10?3wb????????13.001?12.981 ?100%???0.154%?1%(通过)

???12.981(78)空载气隙磁密:

??012.981?10?34 B?0??10??104?0.7578T

?i?lef0.8643?11.39?17.4(79)空载定子齿磁密: Bt0?B?0tlefbtKFeL1?0.7578?1.273?17.4?1.603T

0.616?0.95?17(80)空载定子轭磁密:

??0???????10?34 Bjo??10??104?1.62T

2L1hjKFe2?17?2.483?0.9(81)绕组平均半匝长:

Lav?L1?LE?17?15.75?32.75cm LE-线圈端部平均长,取15.75cm

(82)每相绕组电阻:

2?cuLavN2?0.217?10?3?32.75?96 R1???0.415?

aNtAcu1??2?1.326?1?0.636? ????cu????????mm2?cm

(83)槽比漏磁导:

?1?2h1k1h3h5???s??0.31???k2?0.985???4?3?d2?b?b?d1b0?? ??1.478(84)端部比漏磁导:

?E?0.34 ?0.34?q?LE?0.64???L13?8?15.75?0.64?11.39??? 17?9??0.556(85)差漏磁导:

5?5?0.2b ?d??ps0?0.82?0.35?0.322

4?4?0.25?5?bs00.35(86)齿顶比漏磁导:

?tmax???b2???tminb2?1.154?

?t?bs0??1.273?0.35?1.154?tmax??tmin?4?4?0.2?t?(87)总漏磁导系数:

????s??E??d??t?1.478?0.556?0.322?1.154?3.51

(88)每相绕组漏抗:

f?N?L1X1?15.5??10?2???100?100?pq50?96?17?2 ?15.5? ?3.51?10??100?100?2?3?0.7103? 每相绕组漏抗标幺值: X1??X1IN0.7103?12.025??0.037 U??23122(89)每极电枢磁动势: Fa?0.45mNKdppIN?0.45?3?96?0.9404??????????????A 2(90)交轴电枢反应电抗: