Recent content by Zollie

I realized I made a mistake and the field range is 0- 50 mT and the resolution is 25 uT (=500ppm). Do you think the AD22151 can do this for me? There are some specifications that I don't understand, like the gain and offset errors over temperature range. They are ±1% and ±60 mT, which seems to...

Hi, I would like to use a Hall Sensor (e.g. http://fwbell.com/Category/2.aspx) or a Hall Element IC, like the AD22151 device for magnetic field measurement with a range from 0 to ca. 0,5 mT with a resolution of 250 nT. (500 ppm) The temperature fluctuations are max 1 C. Do you think I can...

Oh, and I have a a laical question: for determining the field distribution from this solenoid, I can use 2 D simulation, right? I mean I don't have to multiply the results by 2*PI or something?

I has got a field line graph but no more options as far as I know. It's a 30 day evaluation version... Yes, I must use PWM for the measurements. That's why I am using the rms.

I'm simulating with MagNet Trial Edition 7.1.3. The field strength at the end of the armature is about 0,5 mT. The field is PWM controlled with 0.85 A rms. I suppose, the gradient is high because the inner diameter of the solenoid is almost as high a the length. But I think there won't be any...

Well, I used a simulation program to simulate the field gradient, then used this data to calculate the errors caused by it with the equations from the above mentioned paper. That should be OK now. On the other hand, wiggling the probe would be a mechanical challenge, I suppose...

You are right, I don't have the 5 μm accuracy, but I don't need it. It seems I wasn't accurate, because, what I have to measure, is the strength of the magnetic field in the "center" (the area is as big as the Hall element) of the solenoid with the given resolution. It's just that I think the...

I have to measure the magnetic field created by a solenoid. My attempt would be using a commercial Axial Hall Probe, or a Hall Sensor with some electronics. It has got an active (sensing) area with a diameter <1 mm. My coil is 12 mm long and has an inner diameter of 9 mm-s. My problem is that...