Charging Mechanism hpa nga ai kun?
Charging Mechanism hpe Charging galaw ai
Ndai daw gaw, charger ni a charge galaw ai lam hpe madi madun ai hku nna, langai sha re ai hte lahkawng lang na charger circuits ni a topological structures ni a ga shadawn ni hpe garan nna madun dan ai.
Mungkan ting na Charging Topology
charger gaw AC hte DC lapran na power electronic jak ni hku nna galai shai wa ai hpe chye na ai. N mai koi gam ai sha, power electronic jak ni gaw reactive power hpe shapraw ya ai, grai n-gun grai ja ai n-gun gaw power grid voltage galai shai ai lam, power jaw ai atsam hpe shayawm ya lu ai, line sum ai lam ni law wa shangun ai. Circuit langai hta active power hte dan dawng ai n-gun atsam a ratio hpe power factor ngu nna lachyum shaleng da ai. Hpang jahtum-user kaw nna power grid hpe grai law hkra n-gun jaw ai n-gun hpe pat shingdang na matu, wan n-gun hpe grai pat shingdang ai lam ni hpe nta hte hpaga lam hta wan n-gun jai lang ai lam lahkawng yan a matu n-gun ja ai hku pat shingdang da ai, law malawng gaw 0.8~0.9 hta n yawm ai. Laksan hku nna jai lang ai ladat langai gaw PFC (Power Factor Correction) hpaji masa rai nna, dai gaw power electronic jak ni kaw na harmonic n san seng ai lam hpe yeng seng kau ya lu nna, shang wa ai atsam hpe grau kaja hkra galaw ya lu ai.
Ndai single-stage hpring ai-bridge PFC hpaji masa gaw, asan sha re ai hkrang masa, n-gun ja ai, n-gun kaba ai, n-gun kaba ai galai shai ai lam zawn re ai akyu ni hpe jaw ya ai, dai gaw, n-gun kaba ai{4}}}} n-gun n-gun jat ai lam ni a matu htuk manu hkra galaw ya ai. Hpye ai-bridge PFC converter langai hpe tup hkrak tup 11-21 hta madun da ai. Mungdaw lahkawng hta bungli galaw ai:ntsa hte lawu lata hte galaw aiHteshingdu maga de. Ntsa hte npu na arm conduction galaw ai shaloi, input inductor kata na current rawt jat wa ai. N bung ai arm conduction galaw ai aten hta, input inductor kata na current gaw hkrat sum mat ai. Control system gaw, input inductor kata na current a galu kaba ai lam hpe gram lajang na matu, input inductor a charge hte discharging cycle a ntsa hte lawu daw a n-gun (duty cycle) hpe gram lajang ya ai, input current hpe input voltage hte phase in phase phase byin shangun ai. Ndai lam gaw hpang jahtum e, n-gun kaba ai{4}}}order ni hpe yeng seng kau ya nna, power factor hpe sharai la lu ai.
N-gun atsam lwi ai lam hpe sawk sagawn yu yang, ntsa hte lawu lata n-gun hpe n-gun dat ai aten hta, n-gun n-gun n-gun gaw 0 rai nna, pru wa ai filter capacitor gaw lit hpe n-gun jaw ya ai hpe mu lu ai; n bung ai lata galaw ai aten hta, n-gun kaba ai{2}} a n-gun law ai galai shai ai lam gaw, shang wa ai inductor hta bang da ai n-gun hpe htawt sit ya nna, dai hpe jaw ya ai
Input cable kaw na n-gun hpe transformer a lahkawng ngu na maga de htawt sit ya ai. Hkrak ai- hpe lawan ai hku bai gram lajang ai hte filtering galaw ngut ai hpang, lit hpe n-gun jaw ya ai. System a lit magam hpe hkang ai hku nna, pru wa ai voltage hpe galai shai mai ai, pru ai voltage hpe rated value hta tawn da mai ai. Operation cycle langai hta, input inductor gaw charge hte discharge cycle lahkawng hpe ngut kre hkra galaw ya ai, n-gun kaba ai{4}}}terquency transformer gaw lahkawng lang myit rawt wa ai, dai gaw n-gun rawng ai lam lahkawng hpe n bung ai hku galaw nga ai. Ndai gaw magnetic core hpe push{6}}pull hku jai lang nna, transformer a magnetic core jai lang ai lam hpe grau kaja hkra galaw ya ai.
Bidictional Charging Topology
Hkrang 11-22 hta, lahkawng maga na charger hpe charge galaw na matu hte garan kau na matu, madung circuit a topological structure hpe madun da ai, dai hta, 3{3}}}pridge voltage-source PWM hpe gram lajang ai hte, lahkawng maga na DC/DC converter hpe lawm ai.
Masum{0}}}pse AC n-gun npawt nhpang ni hpe bungli galaw ai shara tsaw ai- ra ai hta law malawng lang nna, n-gun kaba ai- n-gun n-gun hpe jai lang ai. Bidirectional ngu ai gaw, n-gun lwi ai lam gaw grid maga kaw nna mawdaw battery du hkra, shing nrai, battery maga kaw nna grid maga de du hkra mai byin ai ngu ai lachyum re. Ndai sumla hta lawm ai PWM hpe gram lajang ai PWM rectifier langai mi gaw, lahkawng maga na n-gun atsam lwi ai lam hpe lu la ai, lawan ai hku n-gun rawng ai mahtai, hte n-gun n-gun hpe n-gun jaw ai lam ni nga ai, n-gun rawng ai PWM rectifier amyu langai mi rai nga ai. Dai hta nga ai shaloi .gram lajang ai masa, n-gun gaw grid maga kaw nna lwi pru wa ai, current gaw sinusoidal, shi a daw gaw grid voltage hte maren sha rai nga ai; dai hta bungli galaw ai shaloi .active inversion mungdaw, wan jak battery hta bang da ai n-gun hpe power grid de bai jaw sha ai, grid-side ya na waveform lahkawng yan gaw sinusoidal lahkawng yan rai nna, 180℃shai ai.
DC/DC galai shai ai lam hta lawan ai hku hkam la lu ai, n-gun galai shai ai atsam grai law ai, n-gun n law ai zawn re ai akyu ni nga ai. Hkrang 11-22 hta madun da ai hte maren, charger gaw wan jak mawdaw battery hpe charge galaw ai shaloi, switch .S1gaw galaw nga ai, galai shai ai lamS2galoi mung off nga ai. Dai majaw, lahkawng maga na PWM hpe gram lajang ai wa gaw, gram lajang ai masa hta bungli galaw nga ai, lahkawng maga na DC/DC converter gaw step-down buck masa hta nga ai, grid maga kaw nna battery maga de n-gun atsam lwi nga ai; battery n-gun yawm wa ai shaloi, switch .S2n-gun n rawng ai, galai shai aiS11990 ning hta, DC/DC galai shai ai lam gaw, lahkam-up n-gun jat ai lam hta nga ai, lahkawng lang na PWM hpe hkap la ai wa gaw, shamu shamawt ai inversion state hta bungli galaw nga ai, battery hta bang da ai n-gun hpe, rectifier hku nna, power grid de bai jaw ya ai.
