How to define a motor with constant power kW output in solidworks motion
How to define a motor with constant power kW output in solidworks motion
It doesn't matter what you do. Motors just don't work right in SW Sim.
Hi Roland,
Can you upload your model and maybe I can have a look?
Regards,
Shrikant
Models no longer available. Sorry.
At my last job I did dozens of motion sims on lifting mechanisms, most involving linear actuators, though some with rotation. Constant speed motors and constant power motors just never worked. I even made test simulations to check agains hand calcs. Very poor results from SW Sim.
Ok, try this. Here's a simple fourbar mechanism that uses a constant power motor. Hopefully this will give you some tips about how to implement such motors. The Excel spreadsheet shows that the output power is constant.
Regards,
Shrikant
Thanks Shrikant
Kindly upload files compatable with sw2010
Hi Vishal,
Ok, here's the SW2010-SP05 version of the model.
Regards,
Shrikant
Dear Shrikant
I have used the same logic in my assembly for compressing a spring using a gear train driven by a motor. But the input power and power calculated from reaction moment and angular velocity of input shaft is different. I have captured these things in excel file for an elaborate discussion.
Regards
Vishal
Try putting parentheses around {Angular Velocity4} in your expression.
Regards,
Shrikant
Dear Shrikant
I have tried with the four bar example this is working.
Now I am trying with my mechanism.
I will let you know the result of the same.
Thanks for quick reply and kind support.
Regards
Vishal
Hi Vishal,
If you want to define a rotary motor with constant power, first define a result that measures the angular velocity of the driven part. Then, you need to apply torque to the driven part and set its expression to be (P0)/(omega), where P0 is the constant power of the motor and omega is the angular speed of the driven part (you will have to use the function builder to define this - select the "Expression" button). You need to take care in making sure that omega never goes to zero. You have to apply non-zero initial angular speed to the driven part.
Similarly you can also define a linear motor.
Hope this helps,
Regards,
Shrikant