Learning Forum

[andrein13]

Hello,nI want to simulate the behavior of a contactor whose coil is operated in direct current. What function should I use to set the coil supply with a pulse of 10 ms and a maximum current density of 100A / mm2?Can you please give me an example with the formula to be used?nThanks in advance for your supportn

[Navya C]

nWhat behavior of a contractor do you want to study?nWhich tool are you using for your simulation?nPlease provide some screenshots of your model and setup. It will help us understand the problem better.nnRegards,nNavyan

[andrein13]

nThank you for your support.I made a parallel with the simulation of the coil of a contactor, but in fact what I want to do are the following: ( The program is Ansoft Maxwell 14.0)n1) To supply the coil with a pulse current of 10 ms, with a current density that can reach 100A / mm2n2) To see the value of magnetic induction in the moving rod and the route of the field linesn3)To see when moving the coil the movement of the rod, possibly what force appears, graphically with heat.nI put below a picture with the section of a solenoid.Basically, when I supply the coil, I want the movable rod to move to the left 5mm and close a contact.nn

[Navya C]

nMaxwell 14 is a pretty old version so there may be some changes in the rare case in the procedure that we may not exactly point to. But you can try the following.n1) you can define the winding excitation as external and define an external circuit that generates the square pulses to the winding. OR You can define it as a data set.nCurrent density depends on the amount of current the coil takes and its cross section.nRefer Maxwell help section on Defining the external circuit and exporting circuit netlist to maxwell. OR on defining a data set for excitationnn2) After simulation you can plot the required fields and see the field magnitude and flux lines.n3) You can get the force acting on the mobile rod (at different distances) by assigning the force parameter to it. For getting any thermal-related data you need to perform a workbench simulation.nnRegardsnNavya

[andrein13]

nThank you for your support.nHow can I define that the mobile rod should have a mass of 150 grams and the displacement force of the movable rod is for example 5 kN?Can I see the energy developed in this way?The assigning the force parameter is for rod or for the coil?I try to assign for the rod but without success( do not let me to chose Lorentz or Virtual type).nThank you.n

[Navya C]

nYou can select the rod right mouse click and assign - parameter- force.nIrrespective of the weight of the rod Maxwell will output the amount of force acting on the rod due to Magnetic field interaction.nYou can see the force acting on the rod in results.nThe solenoid model you have is symmetric - you can perform a 2D analysis instead of 3D to save more time.nPlease refer to the getting started guides in maxwell to understand more about setting up your simulation.nnRegardsnNavyan