9?10解：i1?b0?b1?v?vΩ??b2?v?vΩ??b3?v?vΩ?23i2?b0?b1?v?vΩ??b2?v?vΩ??b3?v?vΩ?233v0??i1?i2?R?R2b1vΩ?4b2vvΩ?6b3v2vΩ?2b3vΩ??3?2b1RVΩcosΩt?3b3RV02VΩcosΩt?1.5b3RVΩcosΩt?2b2RV0VΩcos?ω0?Ω?t?2b2RV0VΩcos?ω0?Ω?t?1.5b3RV02VΩcos?2ω0?Ω?t?1.5b3RV02VΩcos?2ω0?Ω?t3?0.5b3RVΩcos3Ωt
输出端的频率分量：?、3?、?0??、2?0??
?P0??10.125??9?12解：m1?2??1?2??1??0.5??P?9???0T?121P0??P0?m2P0T?10.125??0.42?9?10.845?kW?22
9?13?1?vA?t??v??t??V?cos?tvB?t??v?t??2?若D1D2开路，则vA?t??vB?t??v??t?vAB?0?3?若D1D2短路，则vA?t??v??t??V?cos?tvB?0vAB?t??V?cos?t9?18解：R??R1?3R2ri24700?1000????510??1335R2?ri24700?10003?Rd33?3.14?100????0.57R510?4700Kd?cos??0.87V??KdmaVim?0.87?0.3?0.5?0.132V?0.132P????6.33??W?2R?2?133522VimVimKd0.52?0.87P?????41.7??W?2RidR510?4700AP?P?6.33??0.152P?41.7R??R?R1?R22?R22?ri22350?1000510?2350?R22?ri22350?1000?0.55?R1?R2510?4700?1?中间位置9?19解：?2?最高端R?RR1?R2ri24700?1000510?R2?ri24700?1000?0.26?R1?R2510?4700
?R2的触点在中间位置会产生负峰切割失真，而在最高端不会。9?20解：由R?R1?R2??5~10?k??11?R1??~?R2?510?取R2?6k?R1?1.5k?R2ri26?2R??R1??1.5??3?k??R2?ri26?2R?31ma???R93取ma?0.31-ma21?0.32C???0.0187??F?maR?max0.3?9000?2?3.14?30001Ce????0.26??F??minri22?3.14?300?20003?Rd33?3.14?100????0.5R6000?1500Kd?cos??0.93取C1?C2?0.01?F1取Ce?20?FR9000Rid???5?k??能满足要求2Kd2?0.9
?0C2?3.14?465?103?200?10?129?21解：GP???5.84??S?Q0100f0465QL???23.52?f0.720Q0?100??622GP?p24goe?GP?5.84?0.3?100?5.84??10?QL23.5??p34???0.1532gid4700
i?kmV?1tV0cos??0t???1cos?tcos1?kmVcos???1??0???t????cos???1??0???t???1V0?4?cos???1??0???t????cos???1??0???t????11当?0??1时，vS?kmRLV1V0?cos??t????cos??t?????kmRLV1V0cos?cos?t42无失真，?只影响输出幅度。1当?0??1时，vS?kmRLV1V0cos???1??0?t???cos?t2有失真。?1?v1?mV1cos?tcos?1t9?24解：?2?v1?1mV1cos??1???t21i?kmV1cos??1???tV0cos??0t???21?kmVcos???1??0???t????cos???1??0???t????1V0?41vS?kmRLV1V0cos???1??0???t???4当?0??1时，?只产生相移；当?0??1时，有失真。