19 1—19某四极直流电机,电枢槽数Z=36,单迭绕组,每槽导体数为 6,每极磁通2.2×10-2Wb电枢电流Ia=800A,问此时电磁转矩为多 少?如改为单波绕组,保持支路电流不变,其电磁转矩为多少? 解:极对数p=2;单迭绕组时 支路对数a=2,电枢绕组总导体数N=36×6=216 p M 2×216 ×22×102x800=60535(NM) 2×丌×2 单波绕组a=1,支路电流a、l_8002004) 2a2×2 电枢电流=2ai=2×200=4004 电磁转矩M M a 2Ta ·l=60535(N.M1-19 某四极直流电机,电枢槽数Z=36,单迭绕组,每槽导体数为 6, 每极磁通2.2×10-2Wb,电枢电流Ia=800A,问此时电磁转矩为多 少?如改为单波绕组,保持支路电流不变,其电磁转矩为多少? 解: 极对数p=2;单迭绕组时 支路对数a=2,电枢绕组总导体数N=36×6=216 2.2 10 800 605.35( ) 2 2 2 216 2 2 N M I π a pN M C I em M a a = = = = − 单波绕组a=1, 支路电流 200( ) 2 2 800 2 A a Ia ia = = = 电枢电流 2 2 200 400( ) ' I a = a i a = = A 电磁转矩 605.35( ) 2 I N M a pN M C I em M a a = = = 1-19