JoshP322
Mechanical
- Nov 22, 2014
- 1
I am developing a design for a DC Electromagnet being used as an electromagnetic brake. Here is a picture of my design that is modeled in FEMM. I would like some advice to see if there were some modifications I could make to increase my flux density between the pole tips. I am using 1018 Steel and both windings are currently designed with 14 AWG at 255 turns and a current of 100A. This will be a pulsed magnet with a very low duty cycle, less than 1/2 seconds. Unless I can find a better quality steel such as 1008 or 12L14 for the same price and stock size, I am stuck with 1018 for now. So far in my design the magnet is 5 inches high, 5 inches wide, and will be 12 inches in length. The pole gap can't be smaller than 1/2in.
We are looking to have a maximum field strength on the order of 1.5T between the pole tips. However with 14 AWG this would require me to use a at least a 170VDC power supply connected to a capacitor bank to provide the high pulsed current, since I would need to pulse nearly 100A through the windings. So far I have experimented with 16AWG and 18AWG. Though I would be using less current, the increased number of windings and increased resistance make things even more prohibitive due to the need for much higher voltages. Is there a way I can alter my design - either the windings or the magnet geometry so that I wouldn't need to use as much current?
Here is a picture of my model on FEMM 4.2
We are looking to have a maximum field strength on the order of 1.5T between the pole tips. However with 14 AWG this would require me to use a at least a 170VDC power supply connected to a capacitor bank to provide the high pulsed current, since I would need to pulse nearly 100A through the windings. So far I have experimented with 16AWG and 18AWG. Though I would be using less current, the increased number of windings and increased resistance make things even more prohibitive due to the need for much higher voltages. Is there a way I can alter my design - either the windings or the magnet geometry so that I wouldn't need to use as much current?
Here is a picture of my model on FEMM 4.2
