Dear All,
I am modeling a test setup that is used to measure the torque of a rather unconventional electrical machine called the lateral stator machine. You can see this machine in the attached file.
The torque setup is used to measure the standstill torque of the machine as follows. The stator (which comprises the lateral stator, the windings and the shielding iron, all shown in the attachment) is fixed on a piezoelectric torque sensor. The rotor of the machine is positioned in the stator bore without any connections to the stator (no bearings). The rotor is locked, i.e., it cannot move. When currents flow in the windings around the lateral stator legs, a torque is produced.
Since the stator parts cannot be mounted on a torque sensor directly, they are first put in a plastic chamber, which is also shown in detail in the attached file. The plastic chamber is surrounded by an aluminum housing, which is mounted on the torque sensor. The torque sensor has two rings, and measures the torque applied between them.
With this setup, I have been measuring around 20% less torque than expected. Along with other things, one reason could be that the plastic (the weakest link in there) deforms under torque, hence there is some “lost torque” between the stator and the torque sensor. I want to model this test setup to see if this is really the case.
I believe I will need a 3D model of the stator parts as well as the plastic and the aluminum housings, solved by the Structural mechanics->solid-> stationary solver. Then, I think I can apply the torque on the stator parts as a body load (how do I do that exactly?). But the main question is, how do I define/simulate “what the torque sensor sees”? How can I calculate the torque that is transferred to the torque sensor?
Any inputs will be very much appreciated!
Best regards,
Arda
I am modeling a test setup that is used to measure the torque of a rather unconventional electrical machine called the lateral stator machine. You can see this machine in the attached file.
The torque setup is used to measure the standstill torque of the machine as follows. The stator (which comprises the lateral stator, the windings and the shielding iron, all shown in the attachment) is fixed on a piezoelectric torque sensor. The rotor of the machine is positioned in the stator bore without any connections to the stator (no bearings). The rotor is locked, i.e., it cannot move. When currents flow in the windings around the lateral stator legs, a torque is produced.
Since the stator parts cannot be mounted on a torque sensor directly, they are first put in a plastic chamber, which is also shown in detail in the attached file. The plastic chamber is surrounded by an aluminum housing, which is mounted on the torque sensor. The torque sensor has two rings, and measures the torque applied between them.
With this setup, I have been measuring around 20% less torque than expected. Along with other things, one reason could be that the plastic (the weakest link in there) deforms under torque, hence there is some “lost torque” between the stator and the torque sensor. I want to model this test setup to see if this is really the case.
I believe I will need a 3D model of the stator parts as well as the plastic and the aluminum housings, solved by the Structural mechanics->solid-> stationary solver. Then, I think I can apply the torque on the stator parts as a body load (how do I do that exactly?). But the main question is, how do I define/simulate “what the torque sensor sees”? How can I calculate the torque that is transferred to the torque sensor?
Any inputs will be very much appreciated!
Best regards,
Arda