ʻO nā pono a me nā pōʻino o ka dimming lihi mua a me ka dimming lihi hope

ʻO ka dimming alakaʻi (leading-edge phase-cut dimming) a me ka trailing-edge dimming (trailing-edge phase-cut dimming) ʻelua mau ʻenehana hoʻoheheʻe ʻana i ka mana, hoʻohana nui ʻia i nā kukui LED a me nā ʻōnaehana kukui kuʻuna.ʻālohilohiʻenehana:

1.Kumu Hana

ʻO ka Dimming alakaʻi:

Loaʻa ka ʻoki ʻana i ka voltage i ka hoʻomaka ʻana o kēlā me kēia hawewe hapalua o ka pōʻai AC (phase 0°). Ma ka hoʻopaneʻe ʻana i ka hoʻomaka ʻana o ka manawa hoʻokele o ka thyristors (ʻo ia hoʻi, ka hoʻoponopono ʻana i ka angle conduction), ke hoʻomalu ʻia ka volta maikaʻi ma waena o ka ukana, a laila e hoʻoponopono ai i ka mālamalama. No ka laʻana, ʻoi aku ka nui o ka lohi i ke kihi hoʻomaka, ʻoi aku ka pōkole o ka manawa hoʻokele, a me ka haʻahaʻa o ka ʻōlinolino.

Ka hoʻoemi ʻana i ka ʻaoʻao hope:

Hana ʻia ka ʻoki uila ma kahi kokoke i ka hopena o kēlā me kēia hapalua hawewe o ka pōʻai AC (mahele 180°). Ma ka hoʻopau ʻana i nā MOSFET a i ʻole IGBT i ka manawa hoʻokele mua, ua hoʻokō ʻia ka dimming.e hoemi i ke kukui.

2. Nā ʻāpana kumu

ʻO ka Dimming alakaʻi:

Hoʻohana ʻo ia i nā thyristors (SCR/Triac) ma ke ʻano he mea hoʻololi, ʻo ia nā mea semi-controlled (hiki ke kāohi i ka conduction, ʻaʻole hoʻopau ikaika).

Ka hoʻoemi ʻana i ka ʻaoʻao hope:

Hoʻohana ʻo ia i nā MOSFET a i ʻole IGBT ma ke ʻano he mea hoʻololi, ʻo ia nā mea i hoʻomalu piha ʻia (hiki ke hoʻomalu i ka conduction a me ka huli ʻana).

3. Hoʻohālikelike Hana

4.Summary of Pros and Cons

Nā mea maikaʻi no ka Dimming alakaʻi:

ʻO ke kumu kūʻai haʻahaʻa, ʻenehana oʻo, kūpono me nā ʻōnaehana dimming thyristor e kū nei (e laʻa, ʻo ka incandescent kuʻuna.dimmers).

Nā mea maikaʻi ʻole o ka Dimming mua:

Hiki ke ho'āla ʻia ke kukui uila, hoʻopilikia electromagnetic, a ʻaʻole paha e pio ma lalo o nā haʻahaʻa haʻahaʻa.

ʻO nā mea maikaʻi no ka Dimming Trailing-edge:

ʻO ka hoʻoheheʻe ʻana, ʻaʻohe wiliwī, kākoʻo i nā ukana capacitive (e laʻa, nā mea hoʻokele LED), a hiki ke hoʻopau piha.

ʻO nā mea hōʻemi ʻino ʻana ma hope:

ʻO ke kumukūʻai kiʻekiʻe, ke komo ʻana o ka mākeke haʻahaʻa, hoʻohana nui ʻia no ka dimming kukui hoʻokahi.

5.Application Scenarios

ʻO ka Dimming alakaʻi:

He kūpono no nā papahana hoʻihoʻi kukui kuʻuna (e laʻa, hoʻololi i nā ʻōpuʻu incandescent) a me nā ʻōnaehana kukui kalepa mana kiʻekiʻe (pono e hoʻokō i nā koi haʻahaʻa haʻahaʻa).

Ka hoʻoemi ʻana i ka ʻaoʻao hope:

He kūpono no nā kukui LED haʻahaʻa (e laʻa, nā kukui pākaukau, nā kukui hale hoʻokahi) a me nā hiʻohiʻona e koi ana i ka maikaʻi dimming kiʻekiʻe (e laʻa, nā hale hōʻikeʻike, nā hōkele).

6. Nā ʻano hoʻomohala ʻenehana

Ke hoʻomau nei ka dimming alakaʻi ma ka mākeke ma muli o kāna mau kumu kūʻai, akā ke ulu mālie nei ka dimming trailing-edge i nā noi dimming kiʻekiʻe.

7. Ka hopena

ʻO ka dimming alakaʻi a me ka dimming trailing-edge loaʻa nā pono a me nā pōʻino a kūpono i nā hiʻohiʻona noiʻi like ʻole. ʻO ka dimming alakaʻi he kumu kūʻai kūpono a kūpono hoʻi, no ka hoʻihoʻi ʻana i nā kukui kuʻuna a me nā ʻōnaehana mana kiʻekiʻe. Hāʻawi ka dimming traing-edge i ka dimming maʻemaʻe, flicker-free dimming a kūpono i nā pono haʻahaʻa haʻahaʻa a me ka pololei kiʻekiʻe. I ka holomua ʻana o ka ʻenehana, e piʻi mālie ka hoʻohana ʻana i ka dimming trailing-edge ma nā māla dimming kiʻekiʻe.