about motors energy

[jasto]

what is the maximum volts can a 5v motor generate when rotated?

 

[misterT]

The voltage is limited by the mechanical strength of the motor. The faster you can rotate the motor, the higher the generated voltage will be.

 

[mbarazeen]

if what you consider is a DC permanent magnet motor, if you turn it on rated RPM you will get 5V, if you increase the RPM further it will go up & saturate at a certain value..this is due to magnetic characteristic.

when you go for more voltage out, then the current you can consume is limitted lower than rated value.

 

[DerStrom8]

Are you still trying to design that perpetual motion device?

 

[Vizier87]

A big DC permanent magnet motor needs more power, so it also generates more power when it behaves as a generator, and it is so for a small motor. Also counting in the factor of speed, friction, etc.

I'd say let him build the thing anyway. It'll be a learning experience playing with stuff like that.

 

[DerStrom8]

A big DC permanent magnet motor needs more power, so it also generates more power when it behaves as a generator, and it is so for a small motor. Also counting in the factor of speed, friction, etc.

I'd say let him build the thing anyway. It'll be a learning experience playing with stuff like that.

Good point, Vizier. Let him learn the way everybody else learned. Just thought I'd try to save him the trouble.