Mushure mekucheka magetsi, mota ichiri kuda kutenderera kwenguva yakati rebei isati yamira nekuda kweiyo inertia.Mumamiriro ezvinhu chaiwo ekushanda, mamwe mitoro inoda kuti mota imire nekukurumidza, izvo zvinoda kudzora mabhureki emota.Iyo inonzi braking ndeyekupa mota torque yakatarisana negwara rekutenderera kuti iite kumira nekukurumidza.Panowanzove nemhando mbiri dzemabhureki nzira: mechanical braking uye magetsi braking.
Mechanical braking inoshandisa mechanical chimiro kupedzisa braking.Mazhinji acho anoshandisa mabhureki emagetsi, ayo anoshandisa dzvinyiriro inogadzirwa nezvitubu kudzvanya mabhureki pads (bhutsu dzemabhureki) kuita mabhureki mabhureki nemavhiri emabhureki.Mechanical braking ine yakakwirira kuvimbika, asi inoburitsa vibration kana braking, uye braking torque idiki.Inowanzoshandiswa mumamiriro ezvinhu ane inertia diki uye torque.
Mabhureki emagetsi anoburitsa torque yemagetsi yakatarisana neinotungamira panguva yekumisa mota, iyo inoita sesimba rekubhureki kumisa mota.Mabhureki emagetsi anosanganisira reverse braking, dynamic braking, uye regenerative braking.Pakati pavo, reverse connection braking inowanzo shandiswa pakukurumidzira braking ye low-voltage uye diki-power motors;regenerative braking ine zvakakosha zvinodiwa kune frequency converters.Kazhinji, madiki uye epakati-magetsi emagetsi anoshandiswa kune emergency braking.Iyo braking performance yakanaka, asi mutengo wakanyanya, uye gidhi remagetsi rinofanira kukwanisa kuzvigamuchira.Mhinduro yemagetsi inoita kuti zvisakwanise kubhureka ma-high-power motors.
Zvinoenderana nechinzvimbo cheiyo braking resistor, simba rinopedza braking rinogona kukamurwa kuita DC simba rinopedza braking uye AC simba rinopedza braking.Iyo DC simba-inopedza braking resistor inoda kubatanidzwa kune iyo DC divi reiyo inverter uye inongoshanda kune inverters neyakajairwa DC bhazi.Muchiitiko ichi, iyo AC simba-inopedza braking resistor yakabatana zvakananga kune mota kudivi re AC, iyo ine yakakura application renji.
Iyo braking resistor inogadziriswa padivi pemota kuti ishandise simba remota kuti iwane kukurumidza kumira kwemota.Iyo yakakwira-voltage vacuum circuit breaker inogadziriswa pakati peiyo braking resistor uye mota.Mumamiriro ezvinhu akajairwa, iyo vacuum circuit breaker iri munzvimbo yakavhurika uye mota yakajairika.Speed regulation kana simba frequency operation, mune emergency, vacuum circuit breaker pakati pemota ne frequency converter kana gidhi remagetsi rinovhurwa, uye vacuum circuit breaker pakati pemota nebraking resistor inovharwa, uye mashandisirwo esimba. mabhureki emota anoonekwa kuburikidza neiyo braking resistor., nokudaro kuwana mhedzisiro yekukurumidza kupaka.Iyo system single line dhizaini yakaita seiyi:
Emergency Brake One Line Diagram
Mune emergency braking modhi, uye zvinoenderana neinodedera nguva zvinodiwa, iyo yekuwedzeredza ikozvino inogadziriswa kugadzirisa iyo stator yazvino uye braking torque yeiyo synchronous mota, nekudaro kuwana nekukurumidza uye kudzoreka kudzikisira kutonga kwemota.
Muchirongwa chemubhedha wekuyedza, sezvo fekitori yemagetsi grid isingabvumire mhinduro yemagetsi, kuitira kuti ive nechokwadi chekuti simba remagetsi rinogona kumira zvakachengeteka mukati menguva yakatarwa (isingasviki 300 masekonzi) mune emergency, emergency stop system yakavakirwa pane resistor simba. kushandiswa braking kwakagadziriswa.
Iyo yemagetsi drive system inosanganisira yakakwira-voltage inverter, yakakwira-simba-inotenderera yakakwira-voltage mota, mudziyo wekusimudzira, 2 seti dzebraking resistors, uye 4-high-voltage circuit breaker makabati.Iyo yakakwira-voltage inverter inoshandiswa kuona inosiyana frequency kutanga uye nekumhanyisa kudzora kweiyo yakakwira-voltage mota.Kudzora uye maturusi ekushandisa anoshandiswa kupa mafambiro ezvino kumota, uye mana akakwira-voltage wedunhu breaker makabati anoshandiswa kuona kuchinjika kwefrequency conversion yekumhanyisa mutemo uye braking yemota.
Munguva yekukurumidzira braking, high-voltage makabati AH15 uye AH25 anovhurwa, high-voltage makabati AH13 uye AH23 akavharwa, uye braking resistor inotanga kushanda.Iyo schematic diagraph ye braking system ndeiyi inotevera:
Braking system schematic diagram
Iwo tekinoroji maparamita ega rega rega resistor (R1A, R1B, R1C, R2A, R2B, R2C,) ndeaya anotevera:
- Braking simba (yakawanda): 25MJ;
- Kupikisa kutonhora: 290Ω±5%;
- Rated voltage: 6.374kV;
- Rated simba: 140kW;
- Kuwanda kwehuwandu: 150%, 60S;
- Maximum voltage: 8kV;
- Kutonhora nzira: kutonhora kwepanyama;
- Nguva yekushanda: 300S.
Iyi tekinoroji inoshandisa mabhureki emagetsi kuona mabhureki emagetsi ane simba guru.Inoshandisa iyo armature reaction ye synchronous motors uye musimboti wekushandisa simba braking kubhuroka mota.
Munguva yese yekubhureki process, iyo braking torque inogona kudzorwa nekudzora iyo excitation ikozvino.Electric braking ine zvinotevera maitiro:
- Inogona kupa iyo yakakura braking torque inodiwa kukurumidza braking yeyuniti uye kuwana yakakwirira-inoshanda braking maitiro;
- The downtime ipfupi uye braking inogona kuitwa mukati mekuita;
- Munguva yekugadzira mabhureki, hapana maitiro akadai semabhureki ebhureki uye mabhureki mhete izvo zvinoita kuti mechanical braking system ikwisane kune mumwe nemumwe, zvichikonzera kuvimbika kwepamusoro;
- Iyo emergency braking system inogona kushanda yega seyakazvimirira sisitimu, kana inogona kubatanidzwa mune mamwe masisitimu ekutonga se subsystem, ine inoshanduka system yekubatanidza.
Nguva yekutumira: Mar-14-2024