Why Planetary Gear set is really amazing?

This is a planetary gear set, or you can call it an epicyclic gear.
It is used in reduction gear box and automatic transmission.
In a single stage planetary gear set, there is sun gear in centre , sun gear is powered by input shaft, multiple planet gears are installed on the carrier.
besides rotating itself ,these planet gears can orbit around the sun gear when ring gear is locked. Thus carrier rotates and transmits power to the output shaft.
The biggest advantage of planetary gear set is that input and output shaft remains in coaxial form by its design and both shaft rotates at same direction. but output shaft rotates at much slower speed while delivering huge torque output .
Lets find the gear ratio of different gear set.
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[IO-zzxy]

Gear mechanics is increadably facinating to me. The different types of gear boxes and infinate number of combinations is mind boggling and awesome. A mechanical science on it's own.
Regards from South Africa

[Jacopski]

All the videos I watched on this subject either assumed the carrier or ring gear to be stationary and don't explain how either or could be the case and how it can be reduced further, great vid

[johnpenner]

quite amazing — and nicely explained. i come from an electronics background, and dont know much about gears and mechanics. in electronics — you have a transformer — which takes a certain voltage (120volts) and reduces it to another voltage (5volts) — it entails a power reduction — but how is this done mechanically!? when one thing is turning faster than another!? how do you make the faster thing turn the speed of the slower thing (imparting greater power and torque)!? 🍃 the ingenious PLANETARY GEAR is really amazing — a mechanical transformer! thank you for your excellent explication! the animation is superbe, the explanation itself is clear, and the voice is clear, and one of the more pleasant sounding english robot voices ive heard (you can tell where it lacks plural inflections).

[vincentrobinette]

Assuming both planetary sets have the same ratio, (3.33:1) You MULTIPLY the reduction of both gear sets. The answer is A. (~11.1:1 final ratio)

[jesseoterrell]

Looks perfect for starting a Axial Flux generator and motor combo...

[riderzero]

awesome explanation. final gear ratio = option A.

[onerarda]

I understand that as the 30 teeth sun gear rotates, planet gear transfers this 30 teeth among the 70 teeth of ring gear causing 154.285 degrees rotation of the carrier. But why this turn causes additonal turn at sun gear? (video time 4:18) Is it because of the linear motion transfered to the sun gear by the carrier? Can you please explain?

[fernandohood]

What happens if the ring gear is not fixed and the planetary gear is not fixed and an input is given to the sun gear?

[omi-gear]

Is torque double at the center of planet gear or circle of gear, or center of driven shaft... How we calculate.?

[ramonhamm]

What software is used for the awesome 3D models and animation?

[eyyayy]

Can you give me an example of application where the sun gear is fixed ring is output

[RealMesaMike]

Why can't we have real people reading the narration?
The computer generated voice sounds really stilted.

[nemichandkumbhkar]

Isme 7, 8, 9 speed gear kase kam karte hai

[johnpro]

I find music during instructional films distracting ...otherwise good thanks.

[Jane-esez]

a planetary has a ring that has an inner and outer diameter and the outer diameter is always bigger then the inner and the torque is the same so if you put a gear of equal size as the center on the outer diameter the gear will move more times with the torque of the ring
and if you put a planetary of the gear that is on the outer ring the next planetary will have more torque then the first and can move the same speed making a 1 to 1 ratio increase torque, i am having only arguments with designers, maybe you can do the design to explain therei is a inner diameter and outer diameter on the ring gear and the outer will always be bigger and have the same torque as the inner

[khazzxplore]

Jee jee preshar yakee iko ngapi kuzungur shaft

[JoshScotty]

What would these be used in? Can you make a video with examples?

[khazzxplore]

Ring gear inarote marangapi kwa sakol kishaa inazungukomragapi kupiagear nyegine ilkuwalizmzunguko kwa kila gear

[lfzcegi]

D = 4.45 and make Cycloid gear please.

[donerickson]

Invented and found on alien spacecraft