Motors lifespan

[Mauri59]

Is there any official/unofficial document, about the predicted life (hours) of Mavic Pro electric motors?

 

[mpa]

no need to worry, they will outlast the electronics with absolute certainty.

 

[Mauri59]

no need to worry, they will outlast the electronics with absolute certainty.

Doubt it! A well designed electronics, kept in the proper environment, lasts longer than any mechanical part in movement.
A scheduled maintenance, is a well known money saver practice (unless they steal your money, with absurd prices with spare parts).
Moreover with flying machines it's a must, since you can't park on the side of the road, when the engine failure happens
The "fly safe" reccomandation, should include scheduled maintenance, in my opinion.
Last but not least, a brushless DC motor, has electronics inside.

 

[mpa]

A scheduled maintenance, is a well known money saver practice (unless they steal your money, with absurd prices with spare parts).
Moreover with flying machines it's a must, since you can't park on the side of the road, when the engine failure happens

im curious now what maintenance are you referring to?

Last but not least, a brushless DC motor, has electronics inside.

really? so what does the electronics inside the brush-less do?

im am very intrigued by your comments

 

[Top Hat]

im curious now what maintenance are you referring to?



really? so what does the electronics inside the brush-less do?

im am very intrigued by your comments

I'm also intrigued by this electronics in the motor.

 

[Mauri59]

To rotate, an electric motor needs a rotating magnetic field, then an AC current
Using DC, there are only two ways to obtain the above.
Simplifying...
1) With brushes, changing sequentially the supply to windings, in which the DC current is applyed (mechanical switching).
2) Without brushes, an AC synchronuos motor, where the AC is produced by an electronic inverter circuit (or electronic switching)

[QUOTE="mpa, post: 244313, member: 14929"

really? so what does the electronics inside the brush-less do?

im am very intrigued by your comments[/QUOTE]

 

[mpa]

To rotate, an electric motor needs a rotating magnetic field, then an AC current
Using DC, there are only two ways to obtain the above.
Simplifying...
1) With brushes, changing sequentially the supply to windings, in which the DC current is applyed (mechanical switching).
2) Without brushes, an AC synchronuos motor, where the AC is produced by an electronic inverter circuit (or electronic switching)

[QUOTE="mpa, post: 244313, member: 14929"

really? so what does the electronics inside the brush-less do?

im am very intrigued by your comments

ill give you my mavic if you could find an inverter in the mavic motors

 

[mpa]

no need to worry, they will outlast the electronics with absolute certainty.

i was exaggerating a little but brushless motors with minimal load, and being in a clean, and cool environment like it is on the mavic is certainly as ideal as it gets for a brushles motor. there is only 2 moving bits, and they are the bearings, the rest is essentially copper wire with no movement! when was the last time copper failed?

 

[Mauri59]

If it's not exactly inside the motor, then it's inside the drone case, probably integrated with the pwm controller.
A brusheless DC motor, alone, simply, can't exist.

ill give you my mavic if you could find an inverter in the mavic motors

 

[Mauri59]

Each time the enamelled copper wire rises themperature and an "aged" (or stressed) insulating paint gets, step by step, "cooked".
When the insulation is lost, windings short to each other, causing an avalanche effect.

when was the last time copper failed?

 

[Mauri59]

Typical bearings lifespan, as per SKF, goes from 300 to 100.000 hours, depending by speed and load.

there is only 2 moving bits, and they are the bearings