Inside PFS-Large motor

[Philo]

For the record, I opened the motor with only minor damage by cutting slantwise the 4 latches. It is then easy to open the motor by pulling apart halves, and as easy to reassemble...

[Zerobricks]

The motor reminds me of one in the RC buggy motors?

[Saberwing40k]

Excellent, but is the motor bigger or the same size as the one in the M motor? and how about the planetary gears? Anyway, I salute you for opening such a rare part.

[Philo]

Excellent, but is the motor bigger or the same size as the one in the M motor? and how about the planetary gears? Anyway, I salute you for opening such a rare part.

Yes, it's bigger, but the planetary gears looks very similar. Inside M motor can be seen here: http://www.technicbricks.com/2009/09/tbs-technugets-10-inside-pf-m-motor.html

@zblj: Looks similar indeed (photo), but the 2838 motor was not so different either (photo), with very different characteristics!

[RohanBeckett]

although I'm sure they have advanced a bit... but I'm amazed that the motor looks *exactly* like the ones that I used to find, when I ripped open my toys in the 80's (yes, of course I was one of those kids! :)

We can always trust on you, Philo, to go above and beyond... to sacrifice motors to the benefit of all AFOLkind!

RB

[T_Tank]

The motor looks like its about the size of what is used in the kyosho miniZ cars or Xmod rcs so you could possibly upgrade the motor inside if you REALLY wanted to, only issue i see would be either somehow pulling the pinion off the stock motor or finding one that would mesh into the gear reductions. Really wish lego would make a compact radio control module that be roughly the same size as the pf reciever mayber 2 or 3 studs longer but still had the ability to hook pf motors to it.

[Lipko]

although I'm sure they have advanced a bit... but I'm amazed that the motor looks *exactly* like the ones that I used to find, when I ripped open my toys in the 80's (yes, of course I was one of those kids! :)

Electric motors are surprisingly simple machines. I'm sure we'd find same looking motors in the most expensive cars or in spacecraft too.

[Conchas]

Electric motors are surprisingly simple machines. I'm sure we'd find same looking motors in the most expensive cars or in spacecraft too.

If we nowadays look at the interior of the machines that put the men on the moon, we'd get really scared about the components that were used.

Once I saw the Apollo 10 Command Module at the Science Museum in London and got really terrified...

[DLuders]

In this TechnicBRICKS TechNuggets 13 article, Conchas (Fernandno Correia) also exposed the inside of the new Lego Power Functions L-Motor AND the PF Servo Motor:

[le60head]

Thank you for the images! Now i don't have to do the same in order to find out what's inside :)

Here's an off-topic question (probably):

Would it be possible to replace the internal motor with a brushless one? Would it make a big difference?

[GuiliuG]

Does somebody know why is only the first inner gearwheel in metal ?

Edited August 18, 2012 by GuiliuG

[AndyCW]

Thank you for the images! Now i don't have to do the same in order to find out what's inside :)

Here's an off-topic question (probably):

Would it be possible to replace the internal motor with a brushless one? Would it make a big difference?

The brushless motors that I am familiar with from RC planes are three phase. This means that they have three wires going to them and they require a different kind of speed controller than brushed motors. It seems possible to gut the PF chasis and install all custom pieces inside, but it is not likely to be a simple "sodder on this new motor" kind of swap. IMOH

There may be another kind or style of brushless motor out there that would better facilitate this kind of "shananigans", but I am unaware of any such thing.

[le60head]

Thank you for your reply, Andy!

[Tamas Juhasz]

Thank you for the images! Now i don't have to do the same in order to find out what's inside :)

Here's an off-topic question (probably):

Would it be possible to replace the internal motor with a brushless one? Would it make a big difference?

A BLDC(brushless DC) motor is much more expensive than these, so it doesn't make sense. The BLDC motor's liftime is higher(about 2 or 3 times, BUT only when you operate the motor in high rpm, in low rpm a BLDC motor doesn't has advantage compare to the regulars), but the price isn't 2-3 times more(about ten times, if I know well). And than you have to build the new motor inside, you need new electric(inside) for it. The difference between the regular and the BLDC motor would be mostly in the lifteime.

Edited August 19, 2012 by Mbmc

[Morj]

A BLDC(brushless DC) motor is much more expensive than these, so it doesn't make sense. The BLDC motor's liftime is higher(about 2 or 3 times, BUT only when you operate the motor in high rpm, in low rpm a BLDC motor doesn't has advantage compare to the regulars), but the price isn't 2-3 times more(about ten times, if I know well). And than you have to build the new motor inside, you need new electric(inside) for it. The difference between the regular and the BLDC motor would be mostly in the lifteime.

It's also more efficient.