chapter08 交流繞組的感應電勢_2016

1、1第七節(jié)第七節(jié) 正弦磁場下交流繞組的感正弦磁場下交流繞組的感應電動勢應電動勢2交流交流繞組處于旋轉(zhuǎn)磁場中，并切割旋轉(zhuǎn)磁場，產(chǎn)生繞組處于旋轉(zhuǎn)磁場中，并切割旋轉(zhuǎn)磁場，產(chǎn)生感應電勢。感應電勢。3變壓器電勢？運動電勢？變壓器電勢？運動電勢？同步電機同步電機異步電機異步電機4電氣旋轉(zhuǎn)磁場機械旋轉(zhuǎn)磁場5X6789N1S1an =0ea1N0 vBmBx ea1 t018003600S1B10N10vBmBxS1BN2S1 ea1 t018003600111213lvBEmma11 602nPv 60Pnf lfBnPlBEEmmmaa1111260222 14 N S axl=ylBm 12 flBfEm

2、a22. 2)2(211 lfBnPlBEEmmmaa1111260222 15a1aE1aEa16111112()2taaaaaEEEEEE 11144. 42 fEEat1aE1 tEN1S1S2N2aa34 1aENS2aEaa1y flBfEma22. 2)2(211 2aE17線圈線圈有效邊在磁場中節(jié)距有效邊在磁場中節(jié)距為為y1,其感應電勢相位差是其感應電勢相位差是 電角度電角度。N1S1S2N2aa341aE短矩短矩 2aE整矩整矩1aE1 tE2aE2aE 1aENSaa1y1y1801011111802cos22sin904.44aayEyEfk電角度電角度: :01180 y

3、11011290sinatyEEyk 短距系數(shù)：短距系數(shù)：1 tE短矩短矩1aE 2aE2aE112taaEEE0180194.44111 1EW EfN kcc tc yNc2022 R0Ec1Ec1Eq1 q R 23 R0Ec1Ec1Eq1 q R 2sin21 REc 2sin21 RqqEEcq 111sin2sin2qqcqEKqEq221 qsinREq0 241111sin2sin2qqccqEK qEqEq1111114.444.44qcyqcwEfqN K KfqN K；60pnf 111qywKKK 1 111; 1qwyKKK 25111114.4414.44qcyqc

4、wEfqN K KfqN K26a = 1a = 2 N1 S1 N2 S21 2 3 101112 192021AX1114.44qcEfqN Kw111114.444.44ccPqNPEfkwN qfNkwNaa 281111124.444.442cwwcPEfqN kfNkaPqNNa 1114.44qcEfqN Kw301111124.444.44cwwPEfqN kfNka 111114.444.44cPEfkwN qfNkwa 每相每支路串聯(lián)匝數(shù)每相每支路串聯(lián)匝數(shù)31320XBm118003600 /3 NS /5按照電角度理論，按照電角度理論，3603600 0為一對磁極為一對磁

5、極vvPPvv ,v v次諧波旋轉(zhuǎn)速度次諧波旋轉(zhuǎn)速度n nv v= =n n 160vfnPfvvv 601Pnf 為基波頻率為基波頻率4.44PvwvEfvNk1vffv 0XBm118003600 /3 NS /534vkw：v v次諧波繞組系數(shù)；次諧波繞組系數(shù)；v ：每極下每極下v v次諧波次諧波磁通磁通；其中其中：vlBlBmvvmvv 22 yvvvKKpKw 090sin yvKyv 22sinsin vqvqvqK 4.44PvwvEfvNk35 252321EEEEvE 36 252321EEEE22215733lEEEEE 37aatEEE1aaEE112atEE avtvE

6、E2 0 tvE 54 y 76 y vvy1 65 y3839齒諧波齒諧波基波基波e=f(x，t)e40sinsinaemZeEttPwtPZEwtPZEeemema)1sin(2)1sin(21 齒諧波齒諧波基波基波e=f(x，t)e41121 mqPZv)2)12(sin(2)12sin( mqqqmqKqvZp 2 1)2)12(sin(2)12sin(qqvKmqmqqmmqK mpZq2 mmpZZpq 22mq12sinyyvKyvK 42方法：（方法：（1 1）閉口槽）閉口槽 （2 2）q q增大增大 （3 3）斜槽）斜槽 （4 4）采用分數(shù)槽繞組）采用分數(shù)槽繞組bcampZq 2不為整數(shù)不為整數(shù)4344112.222.22*50*2.45272aEfV 182Zp00114sin(90 )sin(90 )0.9418yyk1114.444.44 50 2.45 1 0.945