nhau

PakatiPFC inoshandura magetsi emagetsi, iyo switching power supply yakagadziriswa magetsi chikamu chakakosha zvikuru.Iyo yekuchinjisa magetsi ekupa basa muPFC haina kunyanya kusiyana kubva kune yakajairwa switching simba rekupa, asi pane musiyano mukupihwa kwemagetsi.Zvakajairika kushandura magetsi kunoda 220V rectifier magetsi, ukuwo PFC magetsi inofambiswa neB+PFC.

Mushure mekugadzirisa, hapana sefa capacitor inowedzerwa, uye iyo isina kusefa pulsating yakanaka hafu-kutenderera voltage inoshandiswa sesimba rekupa chopper.Sezvo iyo yakanaka voltage yechopper "yakachekwa" kuita waveform yazvino, maitiro eiyo waveform ndeaya:
1. Ikozvino waveform inorega, uye envelopu yayo yakafanana neiyo voltage waveform, uye chikamu chehamvuropu uye voltage waveform zvakafanana.
2. Pamusana pekuita kwekucheka, hafu-pulsating DC simba inova yakakwirira-frequency (inosarudzwa nekucheka frequency, inenge 100khz) "AC" simba.Iri repamusoro-frequency "AC" simba rinofanirwa kugadziriswa zvakare risati ragona kudzorwa neinotevera PWM switch Power kushandiswa.
3. Kubva pakuona kwehuwandu hwemagetsi ekunze, simba remagetsi rinowana kuti AC voltage uye AC ikozvino iri muchikamu uye magetsi uye ikozvino waveforms inopindirana ne sinusoidal waveform, iyo isingagadzirisi chete dambudziko rekugadzirisa simba rekugadzirisa, asi zvakare inogadzirisa matambudziko e electromagnetic kuenderana uye electromagnetic kupindira.

Iyo yakakwira-frequency "alternating current" simba inogadziriswa neiyo rectifier diode uye inosefa mune yakananga ikozvino voltage uye yozopihwa kune inotevera PWM switching magetsi.Iyi DC voltage inodaidzwa zvakare kuti B+PFC.Iyo B+PFC voltage inobuda nechopper inowanzokwira kupfuura +300V mushure meiyo yekutanga 220 AC kugadzirisa uye kusefa.Chikonzero ndechokuti mutsara we-high-voltage wakasarudzwa, mutsara wemutsara we inductor idiki, uye mutsara wemagetsi unodonha zvishoma.Kugona kwesefa capacitor idiki, uye kusefa kwacho kwakanaka, uye kune akawanda mabhenefiti akadai seakaderera zvinodiwa kune yakadzika PWM switch chubhu.

Parizvino, muPFC inoshandura magetsi emagetsi chikamu, chopper chubhu inoshanda senge switch ine maviri ekushanda modes:
1. Continuous conduction mode (CCM): Kushanda kwekushanda kwechubhu yekushandura kunogara kuripo, uye basa rekutenderera rekufambisa rinoshanduka neamplitude yemagetsi ekucheka.
2. Discontinuous conduction mode (DCM): Nguva yekushanda ye chopper switch chubhu inoshanduka nehukuru hwemagetsi ekucheka.

ThePFC inoshandura magetsichikamu uye chikamu chekusimudzira chePWM chinoshandura simba rekupa chikamu musimba rekugadzirisa kushandura kushandura magetsi zvese zvinopedzwa nedunhu rakasanganiswa, uye IC imwe chete inogona kupedzisa dhizaini.