Isi ihe dị iche n'etiti moto nke ọkụ eletrik mgbanwe ugboro na moto nke ọkụ eletrik na-akwado bụ na n'otu aka, ọ na-arụ ọrụ n'ọtụtụ ugboro site na obere ugboro ruo ugboro dị elu, na n'aka nke ọzọ, ọkụ eletrik na-anaghị abanye na sinusoidal. Site na nyocha usoro Fourier nke voltaji ebili mmiri, ọkụ eletrik na-enye nwere ihe karịrị harmonics 2N na mgbakwunye na akụkụ ebili mmiri bụ isi (ebili mmiri njikwa) (ọnụọgụ nke ebili mmiri modulation dị na ọkara nke ọ bụla nke ebili mmiri njikwa bụ N). Mgbe SPWM AC converter wepụtara ike ma tinye ya na moto ahụ, ọkụ eletrik dị ugbu a na moto ahụ ga-apụta dị ka ebili mmiri sine nwere harmonics dị n'elu. Ọwa eletriki ahụ ga-emepụta ihe na-akpali akpali na sekit magnet nke moto asynchronous, a na-etinyekwa akụkụ magnetic ebili mmiri na flux magnet isi, nke mere na flux magnet isi nwere ihe na-akpali akpali. Akụkụ flux magnet na-akpali akpali na-emekwa ka sekit magnet na-ejupụta, nke nwere mmetụta ndị a na ọrụ moto ahụ:
1. A na-emepụta mmụba magnetik na-akpali akpali
Mfu na-abawanye ma arụmọrụ na-ebelata. N'ihi na mmepụta nke ike ugboro ugboro mgbanwe nwere ọtụtụ harmonics dị elu, harmonics ndị a ga-emepụta oriri ọla kọpa na ígwè kwekọrọ, na-ebelata arụmọrụ ọrụ. Ọbụna teknụzụ SPWM sinusoidal pulse obosara, nke a na-ejikarị eme ihe ugbu a, na-egbochi naanị harmonics dị ala ma na-ebelata ike mkpali nke moto ahụ, si otú a na-agbatị oke ọrụ kwụsiri ike nke moto ahụ na obere ọsọ. Harmonics dị elu abụghị naanị na ọ belatara, kama ọ mụbara. N'ozuzu, ma e jiri ya tụnyere ike ugboro ugboro sine ike, arụmọrụ ahụ na-ebelata site na 1% ruo 3%, a na-ebelatakwa ike ihe ahụ site na 4% ruo 10%, yabụ mfu harmonic nke moto n'okpuru ike mgbanwe ugboro ugboro bụ nnukwu nsogbu.
b) Mepụta mkpọtụ na mkpọtụ elektrọnik. N'ihi na e nwere usoro harmonics dị elu, a ga-emepụtakwa mkpọtụ elektrọnik. Otu esi ebelata mkpọtụ na mkpọtụ abụrụla nsogbu maka moto ndị na-eji sine ebili mmiri arụ ọrụ. Maka moto nke inverter na-eji, nsogbu ahụ na-esikwu ike n'ihi na ọ bụghị sinusoidal nke ike ọkọnọ ahụ.
c) Ọgba ọsọ dị ala na-eme na obere ọsọ. Ike magnetomotive Harmonic na njikọ harmonic current rotor, nke na-ebute torque electromagnetic harmonic na torque electromagnetic harmonic na-agbanwe agbanwe, torque electromagnetic harmonic na-agbanwe agbanwe ga-eme ka pulsation moto ahụ dị elu, si otú a na-emetụta ọrụ dị ala na-adịgide adịgide. Ọ bụrụgodị na ejiri ụdị modulation SPWM mee ihe, ma e jiri ya tụnyere ike sine frequency supply, a ka ga-enwe ụfọdụ harmonics dị ala, nke ga-emepụta pulsating torque na obere ọsọ ma na-emetụta ọrụ kwụsiri ike nke moto ahụ na obere ọsọ.
2.Mee ka voltaji mkpali na voltaji axial (ugbu a) ruo na mkpuchi
a) Voltaji elu na-eme. Mgbe moto ahụ na-arụ ọrụ, a na-ejikarị voltaji etinyere na voltaji elu na-eme mgbe ihe ndị dị na ngwaọrụ mgbanwe ugboro ugboro na-agbanwe, mgbe ụfọdụ voltaji elu na-adị elu, na-ebute mkpọtụ eletriki ugboro ugboro na coil na mmebi na mkpuchi.
b) Mepụta voltaji axial na ọkụ eletrik axial. Mmepụta voltaji shaft bụ isi n'ihi enweghị nhazi sekit magnetik na ihe na-akpali electrostatic, nke na-adịghị njọ na moto nkịtị, mana ọ na-apụta ìhè karịa na moto ndị nwere ike ugboro ugboro na-agbanwe agbanwe. Ọ bụrụ na voltaji shaft dị oke elu, ọnọdụ mmanụ nke ihe nkiri mmanụ dị n'etiti ogwe na ihe na-akpali ga-emebi, ndụ ọrụ nke ihe na-akpali ga-ebelatakwa.
c) Mkpọsa okpomọkụ na-emetụta mmetụta mkpọsa okpomọkụ mgbe ọ na-agba ọsọ n'ọsọ dị ala. N'ihi oke nhazi ọsọ nke moto ugboro ugboro dị iche iche, ọ na-agbakarị ọsọ dị ala na ugboro dị ala. N'oge a, n'ihi na ọsọ ahụ dị obere nke ukwuu, ikuku oyi nke usoro oyi onwe onye nke moto nkịtị na-enye ezughị oke, mmetụta mkpọsa okpomọkụ na-ebelatakwa, a ga-ejikwa mkpọsa fan nke onwe ya.
Mmetụta igwe na-adịkarị mfe inwe resonance, n'ozuzu, ngwaọrụ igwe ọ bụla ga-emepụta ihe na-akpali resonance. Agbanyeghị, moto ahụ na-agba ọsọ na ugboro ike na ọsọ mgbe niile kwesịrị izere resonance na ugboro eke nke mechanical nke nzaghachi ugboro eletriki nke 50Hz. Mgbe a na-arụ ọrụ moto ahụ na mgbanwe ugboro ugboro, ugboro ọrụ nwere oke dị iche iche, akụkụ ọ bụla nwekwara ugboro eke nke ya, nke dị mfe ime ka ọ na-ada ụda na ugboro ole a kapịrị ọnụ.
Oge ozi: Febụwarị-25-2025