Chii chinonzi inverter?
Iyo inverter inoshandura DC simba (bhatiri, bhatiri rekuchengetedza) kuita AC simba (kazhinji 220V, 50Hz sine wave). Iyo ine inverter bhiriji, control logic uye filter circuit.
Zvichitaurwa zviri nyore, inverter chinhu chemagetsi chinoshandura low voltage (12 kana 24 volts kana 48 volts) yakananga ikozvino mu 220 volts alternating current. Nekuti isu tinowanzo shandisa iyo 220-volt inoshandura ikozvino rectifier kuti iite yakananga ikozvino, uye inverter inoita zvakapesana, saka zita.
Chii chinonzi asine wave inverter
Mainverters anogona kuverengerwa zvichienderana nezvaakabuda ma waveforms, a. yakakamurwa kuita square wave inverters, b. yakagadziridzwa wave inverters uye c. sine wave inverters.
Naizvozvo, tsananguro ye sine wave inverter inverter iyo inobuda waveform iri sine wave.
Chakanakira ndechekuti yakabuda waveform yakanaka, iko kukanganisa kwakadzikira, uye kubuda kwayo waveform inowirirana neAC waveform yegridi mains. Muchokwadi, kunaka kweiyo AC simba rinopihwa neakanakisasine wave inverteryakakwirira kupfuura iyo yegridi. Iyo sine wave inverter ine zvishoma zvinokanganisa redhiyo, midziyo yekutaurirana uye chaiyo midziyo, yakaderera ruzha, yakasimba mitoro inochinjika, inogona kusangana nekushandiswa kwese AC mitoro, uye muchina wese une hunyanzvi hwepamusoro; kuipa kwayo ndeyekuti mutsara uye hukama hwekugadzirisa wave inversion Iyo inverter yakaoma, ine zvinodiwa zvakanyanya zvekudzora machipisi uye tekinoroji yekuchengetedza, uye inodhura.
Inoshanda sei?
Usati wasuma mutemo wekushanda wesine wave inverter, tanga kuunza nheyo yekushanda ye inverter.
Iyo inverter ndeye DC kune AC shanduri, inova chaizvo maitiro emagetsi inversion neinoshandura. Iyo inoshandura inoshandura iyo AC voltage yegridi yemagetsi kuita yakagadzikana 12V DC inobuda, nepo inverter ichishandura iyo 12V DC voltage inobuda neAdapter kuita yakakwirira-frequency yakakwira-voltage AC; ese ari maviri anoshandisawo anowanzo shandiswa pulse wide modulation (PWM) maitiro. Chikamu chayo chepakati iPWM yakasanganiswa controller, iyo Adapter inoshandisa UC3842, uye inverter inoshandisa TL5001 chip. Iyo yekushanda voltage renji yeTL5001 ndeye 3.6 ~ 40V, uye yakashongedzerwa ine kukanganisa amplifier, regulator, oscillator, PWM jenareta ine akafa zone control, yakaderera voltage yekudzivirira uye pfupi yedunhu redziviriro redunhu.
Input interface chikamu: Kune masaini matatu muchikamu chekuisa, 12V DC yekuisa VIN, basa rinogonesa voltage ENB uye Panel ikozvino yekudzora chiratidzo DIM. VIN inopiwa neAdapter, ENB voltage inopiwa neMCU pabhodhi reamai, kukosha kwayo 0 kana 3V, apo ENB = 0, inverter isingashande, uye kana ENB = 3V, inverter iri mumamiriro ekushanda; nepo DIM voltage Inopihwa nebhodhi hombe, mutsauko wayo uri pakati pe0 ne5V. Hunhu hwakasiyana hweDIM hunodzoserwa kune iyo mhinduro terminal yePWM controller, uye ikozvino yakapihwa neinverter kumutoro ichave yakasiyana. Iyo diki iyo DIM kukosha, idiki iyo inobuda ikozvino yeiyo inverter. chikuru.
Voltage yekutanga seketi: Kana ENB iri padanho repamusoro, inoburitsa yakakwira voltage kuti ivheneke iyo Panel's backlight chubhu.
PWM controller: Iyo ine anotevera mabasa: yemukati referensi voltage, kukanganisa amplifier, oscillator uye PWM, overvoltage dziviriro, undervoltage dziviriro, pfupi dunhu kuchengetedza, uye inobuda transistor.
Shanduko yeDC: Iyo voltage shanduko yedunhu inoumbwa neMOS switching chubhu uye simba rekuchengetedza inductor. Iyo yekupinza pulse inokwidziridzwa nepush-pull amplifier uye yobva yatyaira iyo MOS chubhu kuita switching chiito, kuitira kuti DC voltage ichaja uye inoburitsa inductor, kuitira kuti imwe magumo einductor iwane AC Voltage.
LC oscillation uye inobuda dunhu: ita shuwa kuti 1600V voltage inodiwa kuti mwenje utange, uye kuderedza voltage kusvika 800V mushure mekunge rambi ratanga.
Output voltage mhinduro: Kana mutoro uchishanda, sampling voltage inodzoserwa kudzikamisa kubuda kwevoltage yeI inverter.
(Complex sine wave circuit diagram)
Musiyano uripo pakati pe sine wave inverter neyakajairwa inverter ndewekuti kubuda kwayo waveform ndeye sine wave ine yakaderera yekukanganisa mwero, saka hapana kupindira kune redhiyo nemidziyo yekutaurirana, ruzha zvakare rwakadzikira, basa rekudzivirira rakakwana. , uye kushanda kwese kwakakwirira.
Chikonzero neisine wave inverterinogona kuburitsa sine wave yakakwana imhaka yekuti inoshandisa tekinoroji yeSPWM iyo yakakwira kupfuura PWM tekinoroji.
Nheyo yeSPWM yakavakirwa pamusimboti wakaenzana wekuti mapurusi anobata panguva yezvishandiso zvenguva: kana mapurusi akashanda panguva yezvishandiso zvenguva, chigadzirwa chepamusoro kukosha uye nguva yekuita zvakaenzana, uye mapurusi aya anogona kufananidzwa kuti aenzane.
SPWM inoenzanisa mutsara wetriangular wave neyakagadziriswa frequency uye yakatarwa peak kukosha (senge switching frequency 10k) nereferensi sine wave (yakakosha wave) yeinosiyana frequency uye voltage, kuitira kupuruzira iyo DC voltage (pulse nekuchinja basa kutenderera) kuti isvike. iyo referensi sine wave pane mudziyo. Iyo amplitude uye frequency yereferensi sine wave inogadziriswa kuti igadzire DC voltage pulse wide modulation mafungu akaenzana nereferensi sine wave ine akasiyana amplitudes uye ma frequency.
Nguva yekutumira: Feb-05-2024
