Chinyorwa naChris Kinsfather |Kurume 20, 2017 |AC Drives |
Iyo mota inodzora nyika inogona kuvhiringa chokwadi.Nekuchinjana kwemazwi, chirevo chechokwadi cheVFD (Variable Frequency Drive) dzimwe nguva chinogona kuvhiringika neizwi rokuti INVERTER.Kuti tinzwisise zviri nani kuti sei kutenga VFD kungave kana kusave mhinduro yakakunakira iwe tinoda kutanga netsananguro pfupi uye iri nyore kunzwisisa yekuti VFD chii chaizvo.
VFD ndeyemagetsi neyemagetsi yakavakirwa frequency manipulation mudziyo une chinangwa cheku:
● Kutora AC simba padivi rekupa
● Kushandura simba iroro kumagetsi eDC
● Kuchengeta magetsi iwayo muVFD
● Kushandisa tekinoroji yemukati meiyo superfast switching tekinoroji inodaidzwa kuti IGBT'S iyo inozogadzira 'sine wave-like' fomu inogona kushandiswa ne "kuchinja iyo yakajairwa 60 HZ frequency" kune imwezve kukosha, zvichibva zvachinja kumhanya kwe3 phase inductive kana dzimwe nguva PM mhando mota.
Inonzwika nyore here?Anenge matatu ekutanga mabara mapoinzi akaita… asi apa ndipo panogona kuita hunyengeri.Kunyange chiri chokwadi kuti VFD inoita "Invert" AC mutsara wazvino, izvo zvinogadzirwa neVFD HAZVISI yakachena AC sine wave.Ndinorevei neizvi?Apa ndipo patinowanzosangana nekuvhiringika.Idzidziso yakajairika kuti VFD inogadzira yakachena AC sine wave senge ROTARY PHASE CONVERTER (RPC), izvo zvisiri izvo.
Izvo zvinopihwa neVFD ndeye simulated sine wave kuburikidza (PWM) pulse wide modulation.Iyo PWM inobuda ingori inongoshandiswa wave yeDC kubuda.Mune iyi fomati yakavanzika, chimwe chinhu senge AC INDUCTION mota haigone kusiyanisa pakati pe AC neDC mafungu.
Chinangwa chese kuseri kwechishandiso hachisi chinhu kunze kwekufananidza kumhanya kunodiwa kunodiwa kune process application.Izvi zvinogona kusiyana kubva pakufambisa sisitimu, feni/kuvhuvhuta masisitimu ekumanikidza kana kuyerera zvinodiwa, kumhanya kunodiwa kune maspindles panzvimbo dzemachining uye mamwe marudzi mazhinji ekugadzirisa application anoshandiswa mumhando dzese dzeindasitiri.
Nekudaro, ichi zvakare chikonzero nei VFD isingakwanise kushandiswa se "GENERAL POWER SUPPLY" kudzora muchina, ndeye MOTOR SPEED CONTROLLER.Chero kusashandiswa kwechinangwa ichi kunogona kutungamira kumichina uye kana VFD kukundikana.
Ndeapi maapplication ayo VFD HAIZVO kushandiswa pairi?
● Mitoro inodzivirira (Welders, Ovens, Heaters, nezvimwewo)
● Traditional 1 Phase motors ane caps
● Zvishandiso zvine main control panel uye (kugovera mukati) kuedza kushandisa VFD semagetsi.
● Kuisa VFD kumuchina une maswichi akabatana zvakananga kumota (VFD inoda kubatanidzwa zvakananga kumota) Maseketi akavhurika anogadzira moto semuenzaniso.
Muchidimbu, munhu anofanirwa kushandisa RPC kudzora muchina wese kana ichida 3-chikamu simba uye kushandisa VFD kana munhu achinyatsoda mota kumhanya kudzora uye yakanangana neiyo AC induction mota inokwanisa kubata wave wave sekupihwa ne VFD controller.Mukushandisa iyi pfungwa yakapusa, munhu haazove nekutadza kwemidziyo zvakare.
Chris Kinsfather
Nguva yekutumira: Oct-19-2022