Ko te rerekētanga matua i waenga i te pūhiko hiko whakawhiti auau ā-mōta me te pūhiko hiko ngaru sine auau ā-mōta, i tētahi taha, ka mahi i roto i te whānuitanga auau whānui mai i te auau iti ki te auau teitei, ā, i tētahi taha, kāore te āhua o te ngaru hiko he sinusoidal. Mā te tātari raupapa Fourier o te āhua o te ngaru hiko, kei roto i te āhua o te ngaru hiko neke atu i te 2N ngā haungarau hei tāpiri atu ki te wāhanga ngaru taketake (ngaru whakahaere) (ko te maha o ngā ngaru whakarerekētanga kei roto i ia haurua o te ngaru whakahaere ko N). Ina whakaputa te kaitahuri AC SPWM i te hiko ka whakamahia ki te pūhiko, ka puta te āhua o te ngaru o te iahiko i runga i te pūhiko hei ngaru sine me ngā haungarau kua tāpirihia. Ka whakaputahia e te iahiko haungarau he wāhanga rerenga aukume pupuhi i roto i te ara iahiko aukume o te pūhiko kore-tukutahi, ā, ka tāpirihia te wāhanga rerenga aukume pupuhi ki runga i te rerenga aukume matua, kia mau ai te rerenga aukume matua i te wāhanga rerenga aukume pupuhi. Ka meinga hoki e te wāhanga rerenga aukume pupuhi te ara iahiko kia mākū, ā, ko ēnei ngā pānga ki te mahi a te pūhiko:
1. Ka whakaputahia te rerenga aukume e pupuhi ana
Ka piki ake ngā mate, ka heke te whai huatanga. Nā te mea he nui ngā haunga teitei kei roto i te putanga o te pūhiko hiko auau rerekē, ka puta i ēnei haunga te paunga parahi me te rino e rite ana, ka whakaiti i te whai huatanga whakahaere. Ahakoa te hangarau whānui pāorooro sinusoidal SPWM, e whakamahia whānuitia ana i tēnei wā, ka aukati noa i ngā haunga iti, ka whakaiti i te taipana pāorooro o te motuka, ka whakaroa i te whānuitanga mahi pumau o te motuka i te tere iti. Ā, kāore i te heke noa ngā haunga teitei, engari i piki ake. I te nuinga o te wā, ki te whakataurite ki te pūhiko hiko sine auau mana, ka heke te whai huatanga mā te 1% ki te 3%, ā, ka heke te tauwehenga mana mā te 4% ki te 10%, nō reira he raruraru nui te ngaronga haunga o te motuka i raro i te pūhiko hiko huringa auau.
b) Whakaputa i te wiri me te haruru hikohiko. Nā te noho o tētahi raupapa o ngā harmonika teitei, ka puta hoki te wiri me te haruru hikohiko. Ko te whakaiti i te wiri me te haruru he raruraru kē mō ngā motuka e whakahaerehia ana e te ngaru sine. Mō te motuka e whakahaerehia ana e te inverter, ka uaua haere te raruraru nā te āhua kore-sinusoidal o te pūtake hiko.
c) Ka puta te taipana pāorooro auau iti i te tere iti. Mā te kaha aukume haumākū me te ia haumākū hurihuri e hangai ai te taipana hiko haumākū tonu me te taipana hiko haumākū tauutuutu, ka meinga te taipana hiko haumākū tauutuutu kia pāorooro te motuka, ā, ka pā ki te mahi pumau o te tere iti. Ahakoa te whakamahi i te aratau whakarerekētanga SPWM, ki te whakatauritea ki te pūhiko hiko sine auau mana, ka noho tonu he taumata o ngā haumākū iti-ōrite, ka puta he taipana pāorooro i te tere iti, ā, ka pā ki te mahi pumau o te motuka i te tere iti.
2.Whakaputahia te ngaohiko hiko me te ngaohiko tuaka (iahiko) ki te whakamarumaru
a) Ka puta te ngaohiko ngaru. I te wā e oma ana te motuka, ka honoa te ngaohiko e whakamahia ana ki te ngaohiko ngaru i hangaia ina hurihia ngā wāhanga o te taputapu hurihanga auau, ā, i ētahi wā ka teitei te ngaohiko ngaru, ka hua ake he ru hiko tonu ki te koiri me te kino ki te whakamarumaru.
b) Te whakaputa i te ngaohiko tuaka me te ia o te tuaka. Ko te whakaputanga o te ngaohiko poutū te take matua o te noho o te kore taurite o te ara iahiko aukume me te āhuatanga whakaawe hiko, kāore i te kino i roto i ngā motuka noa, engari he nui ake te kitea i roto i ngā motuka e whakahaerehia ana e te tuku hiko auau rerekē. Mena he teitei rawa te ngaohiko poutū, ka pakaru te āhua whakahinuhinu o te kiriata hinu i waenga i te poutū me te peera, ā, ka poto te roa o te mahi a te peera.
c) Ka pā te werawera ki te pānga o te werawera ina rere ana i te tere iti. Nā te whānuitanga o te tere o te motuka auau rerekē, ka rere pinepine i te tere iti i te auau iti. I tēnei wā, nā te tino iti o te tere, kāore i te rawaka te hau whakamatao e tukuna ana e te tikanga whakamatao hau-whaiaro e whakamahia ana e te motuka noa, ā, ka whakaitihia te pānga o te werawera, ā, me whakamahi te whakamatao hau-motuhake.
He ngāwari te pānga o te miihini ki te haruru, i te nuinga o te wā, ka puta he āhuatanga haruru i roto i tētahi taputapu miihini. Heoi, me karo te motuka e rere ana i te auau me te tere pūmau i te haruru ki te auau tūturu miihini o te urupare auau hiko o te 50Hz. Ina whakahaerehia te motuka me te huringa auau, he whānui te whānuitanga o te auau whakahaere, ā, he auau tūturu anō tō ia wāhanga, e ngāwari ai te haruru i tētahi auau kua whakaritea.
Te wā tuku: 25-Pepuere-2025