Motor Torque Calculation for Amusement Ride

In summary, the amusement ride requires a motor that can provide at least 1/50th of the required torque to start up.
  • #1
skella
1
0
Hi

I'm looking for some info and advice. I've looked across the Internet and forums looking at different formulas for working out the torque requirements for a motor but can't find anything that helps me.

I have designed a small amusement ride. Please see pic below.

2657.jpg


The outer ring (yellow) needs to rotate at approx 35rpm.

The mass of the ring and everything inside it is approx 750kg.

The diameter of the ring is 3m

How do I work out the torque required to spin the disc? And does adding in a gear box effect the torque needed at the motor? It's hard for me to select a suitable motor without knowing the power required. But let's say for example the motor is 1800rpm. For me to gear that down to 35rpm how does that effect the torque needed by the motor?

Any help and advice appreciated.
 
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  • #2
Excuse my bluntness but if you don't have the engineering skills to spec a motor how have you managed to do the structural design?

As for motor selection, are you familiar with these?
P=Tω
T=Iα

At constant speed motor torque has to only overcome friction, and will probably be a small fraction of the torque required for a reasonable start up acceleration. In other words, design for start up, not constant speed.
 
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Likes Rx7man
  • #3
I agree with everything billy_joule said...

anyhow, first figure out your reduction ratio.. 1800/35 = ~50:1, so whatever torque you require to spin the ride, the motor needs to provide at least 1/50th of that before reduction.

It seems to be designed so that it's relatively balanced, or should I say the center of mass is close to the rotating axis? You need to find out what the maximum torque is due to the that, and then add in any acceleration over and above that... from there you can choose a motor that will provide that kind of torque..
 
  • #4
+2

Torque = Moment of Inertia * angular acceleration.

If you know how fast it must spin up you can calculate the angular acceleration. Depending on how accurate you need the answer you might approximate the moment of inertia to that of a disc...

https://en.wikipedia.org/wiki/List_of_moments_of_inertia
 

FAQ: Motor Torque Calculation for Amusement Ride

What is motor torque?

Motor torque is the measure of rotational force produced by a motor. It is typically measured in units of Newton-meters (Nm) or pound-feet (lb-ft) and is an important factor in determining the power and performance of a motor.

Why is motor torque important in amusement rides?

In amusement rides, motor torque is important because it determines the amount of force that can be applied to the ride and the speed at which it can move. The higher the motor torque, the more powerful the ride will be and the faster it can move.

How is motor torque calculated?

Motor torque can be calculated by multiplying the motor's speed (in revolutions per minute) by the motor's output power (in horsepower) and dividing by a constant factor. This calculation can be more complex depending on the type of motor and its characteristics, but the basic formula remains the same.

What factors influence motor torque in amusement rides?

There are several factors that can influence motor torque in amusement rides, including the type of motor being used, the voltage and current supplied to the motor, and the load being placed on the motor. Other factors such as friction and mechanical efficiency can also affect motor torque.

How can motor torque be optimized in amusement rides?

To optimize motor torque in amusement rides, it is important to select the right type and size of motor for the specific ride. The voltage and current supplied to the motor should also be carefully calculated to ensure optimal performance. Additionally, regular maintenance and lubrication can help to maintain and improve motor torque over time.

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