Re: A simple question I think?
- From: "YouGoFirst" <yougofirst@xxxxxxxxxxx>
- Date: Wed, 18 Jan 2006 15:22:54 GMT
"rich" <rich.fy@xxxxxxxxxxxxx> wrote in message
news:1137536112.618066.121550@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hi,
> I haven't done any mechanical calulations for a few years now and
> having problems thinking this problem out, can anyone put my mind at
> rest?
>
> Scenario: 2 conveyor belts running at 3m/s conveyor1 feeds conveyor2.
>
> If conveyor2 increases to 4m/s would the load on the motor driving it
> increase or decrease?
>
> I realise if they both were to increase to 4m/s the load would
> obviously increase, but if only conveyor 2 increases surely it would
> have less material on it and therefore less load on the motor. Am I
> thinking correctly? How can I prove or not prove this mathematically?
>
One way that I thought of that you can prove it mathematically is to look at
the motor. Electric motors have a power curve. The power curve describes
its output toque as a function of its RPM's. Depending on the type of motor
(I assume that its speed is a function of voltage input) the power or energy
required to achieve a desired RPM can be a function of voltage or current.
If you look at the motor and the friction on the conveyor as a function of
both load and speed, you should be able to easily show an increase in power
consumption.
However, everything that I have just said could be moot if to increase the
conveyor's speed you have only changed out the gearbox and the motor running
the system had more than enough torque available to handle the system. In
that case, the energy would remain the same, or else not increase
significantly.
.
- References:
- A simple question I think?
- From: rich
- A simple question I think?
- Prev by Date: Question on "air bearings"
- Next by Date: Re: Questions regarding thread diameter and pitch for special design case wtih limited thread length
- Previous by thread: Re: A simple question I think?
- Next by thread: Questions regarding thread diameter and pitch for special design case wtih limited thread length
- Index(es):
Relevant Pages
|
