He mea nui te mahi a te kaitahuri OTIS OVF20 i roto i ngā pūnaha ararewa hou, kia maeneene ai, kia haumaru ai hoki te mahi. Ko tana mahi matua he huri i te mana AC e tukuna ana ki te ararewa hei putanga AC whakahaeretia, auau-rerekē e whakahaeretia ana, e akiaki ana i te motuka me te whai hua.
Ka tīmata te tukanga me te hiko AC e tomo mai ana, 380V, 220V rānei, ka hurihia tuatahitia ki te ngaohiko DC e te pūnaha whakatikatika i roto i te inverter. Kātahi ka whakauhia tēnei ngaohiko DC e ngā pūnga i roto i te ara iahiko DC hei whakarato i tētahi putunga pumau. Kātahi ka whakamahia e te inverter he pūnaha whakarerekētanga whānui-pulse (PWM) hei huri i tēnei DC kua whakatikatikaina ki te ngaohiko AC me te auau whakarerekē, hei whakaoti i te tukanga inverter.
I roto i te OVF20, ko te wāhanga tuatahi e kitea ana i muri i te whakatuwheratanga o te taupoki o mua ko te Poari Whakahaere Nekehanga II (MCBII). E ai ki tōna ingoa, ko tēnei papa te kawenga mō te whakahaere i te pūnaha nekehanga o te ararewa. Koia te atanga mō ngā tohu whakauru me ngā tohu whakaputa katoa o te OVF20, ā, ka tukatukahia ēnei tohu kia tika ai te mahi.
Ka tukuna e te pūnaha whakahaere ararewa—pērā i te LBII, LCBII, ētahi atu papa whakahaere rānei—ngā whakahau tere ki te MCBII. Ka tukatukahia ēnei whakahau e te MCBII me ngā tohu ara hiki atu, tae atu ki ngā ara iahiko haumaru. Kātahi ka tukuna ngā tohu whakahaere ki te Poari Puku Hiko (PDB), e whakahaere ana i ngā transistors mana-teitei i roto i te inverter hei mahi i te huringa AC tuturu. Ko te tikanga, ka whakahaerehia e te PDB te whakawhiti hiko o te inverter i raro i te arataki a te MCBII.
Mō te mahi tika, ka whiwhi urupare hoki te MCBII mai i te pūoko tere PVT. Mā te whakatairite i te tere tuturu o te ararewa ki te tere kua whakahaua, ka whakatikatika te MCBII i te putanga o te motuka kia mau tonu te nekehanga maeneene me te pono. E rua atu ngā aho mai i te inverter e whakarato ana i te urupare iahiko ki te MCBII hei wāhanga o te pūnaha tiaki iahiko ā-roto o te inverter. Mena ka nui ake te iahiko putanga i te uara kua whakatauria, ka whakaoho te inverter i te whakaweto tiaki.
Hei whakamutunga, kei roto i te OVF20 he pūnaha ātete aukati. Ka whakamahia tēnei ātete hei whakaiti haumaru i te tere o te ararewa, hei huri i te kaha nui ki te wera hei whakarite i te tūnga haumaru me te whakahaere.
I te nuinga, ka whakakotahi te kaitahuri OTIS OVF20 i te mana nekehanga tika, te urupare wā-tūturu, me ngā tikanga haumaru hei whakarato i te mahi pono mō ngā ararewa hou.
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