I have a small but urgent electromagnet project in process however the actuator I need doesn't seem to be readily available although although it's not anything new, except for the custom size I need. Attached is a reference sketch.
I ordered and received these 12mm OD buzzers 12mm WST-1212S Soberton Inc | 433-1050-ND| DigiKey and Digikey just confirmed that there are also permanent magnets (PM) inside, which makes sense since they are something like an audio speaker and they also include mini electromagnets.
No. 1 in the sketch sheet illustrates what I need to make with the electromagnets (EMs) that are inside the buzzers. These parts will all fit inside a tube. When the EM is intermittently powered, it will push away a permanent magnet (PM) with the same polarity facing the EM. The PM's opposite side rests against a pin which rests against a spring. The purpose of it is to replace a push solenoid's function with it, because the mini push solenoids I've found are still both too big and too expensive.
Exactly what the needed pushing force is I don't know but it's not a whole lot. I would very generally estimate that the minimum would be equivalent to say, if the described EM were on a surface, oriented so the push was upwards, and the end of a pencil rested on it and the other end of the pencil was on the same surface, if it would instantly lift the end of the pencil resting on it upwards. That should be the minimum for it to work out. Of course, the more pushing force the better. It also needs to work off a small battery (about an inch long) up to say up to 12v, preferred. So that doesn't give much in Amps to work with.
Besides hand tools, I also have a power source which is rated up to 30VDC and 5Amps and I also have a digital Gauss meter which I haven't used yet, to help figure this out.
No2. in the sketch sheet is my attempt to bring clarity to contradicting information I've found regarding the correct magnetic wire winding method to get the most magnetic flux. The question arises regarding the added layers. Is it best to wind as shown in method A or method B or something else? It would be good to know this to see how the little EMs in the buzzers are wound and how to best do the winding if I need to make custom EMs, in case the ones in the buzzers won't do the job.
Please let me know what the general specs of the EM should be along with the power and Gauss that would be needed to achieve at least the minimum push force required. Also about the best winding method for maximum Gauss. Thanks very much for your help.
Bretina
FL, USA
I ordered and received these 12mm OD buzzers 12mm WST-1212S Soberton Inc | 433-1050-ND| DigiKey and Digikey just confirmed that there are also permanent magnets (PM) inside, which makes sense since they are something like an audio speaker and they also include mini electromagnets.
No. 1 in the sketch sheet illustrates what I need to make with the electromagnets (EMs) that are inside the buzzers. These parts will all fit inside a tube. When the EM is intermittently powered, it will push away a permanent magnet (PM) with the same polarity facing the EM. The PM's opposite side rests against a pin which rests against a spring. The purpose of it is to replace a push solenoid's function with it, because the mini push solenoids I've found are still both too big and too expensive.
Exactly what the needed pushing force is I don't know but it's not a whole lot. I would very generally estimate that the minimum would be equivalent to say, if the described EM were on a surface, oriented so the push was upwards, and the end of a pencil rested on it and the other end of the pencil was on the same surface, if it would instantly lift the end of the pencil resting on it upwards. That should be the minimum for it to work out. Of course, the more pushing force the better. It also needs to work off a small battery (about an inch long) up to say up to 12v, preferred. So that doesn't give much in Amps to work with.
Besides hand tools, I also have a power source which is rated up to 30VDC and 5Amps and I also have a digital Gauss meter which I haven't used yet, to help figure this out.
No2. in the sketch sheet is my attempt to bring clarity to contradicting information I've found regarding the correct magnetic wire winding method to get the most magnetic flux. The question arises regarding the added layers. Is it best to wind as shown in method A or method B or something else? It would be good to know this to see how the little EMs in the buzzers are wound and how to best do the winding if I need to make custom EMs, in case the ones in the buzzers won't do the job.
Please let me know what the general specs of the EM should be along with the power and Gauss that would be needed to achieve at least the minimum push force required. Also about the best winding method for maximum Gauss. Thanks very much for your help.
Bretina
FL, USA