zombiess
10 MW
I've been working to develop a high current controller for several years. The journey has involved crazy amount of research to figure out viable solutions for working into the +1kA range in a compact design using multiple paralleled commodity devices. While I have worked on this project on and off over several years, one thing has kept me from making the progress I really need to make, working with a team of others who are also motivated to push the limits.
There are a bunch of challenges involved, many which it appears I've already overcome, but I've come to the conclusion that I'm not able to go at this solo as I have been trying to for so many years. One of the larger challenges is controller development. I really desire to run a custom controller built around TI's Instaspin FOC. Instaspin has a steep learning curve (shaped like a cliff) just to handle simple tasks like getting a throttle setup and having the code execute upon boot, however I've made it past most of these hurdles, and have several dents in the walls shaped like my head in various locations throughout my office from getting stuck. The reason for developing with Instaspin is due to needing some customized control to accommodate some of the ideas I've come up with. Right now I'm working to get a VESC based controller working and have the hardware designed. Making this hardware compatible with Instaspin is fairly straight forward as I made my controller modular. I'm hoping VESC is simple a stop gap on the way to more advanced ideas.
I have built a full scale half bridge using 9 paralleled TO-247 devices and through double pulse testing have verified near equal current sharing among all devices. Since that design several years ago, I've managed to shrink it to a much smaller scale and improve upon it as well as increase the MOSFET count up to 24 TO-220 devices.
If you have a background in any of the following and are a highly self motivated individual:
programming C
motor controller design / algorithms
power electronics
production / manufacturing
business contacts
machining (I need custom aluminum and possibly copper parts made)
if you think you have skills which you could contribute I'd be interested in hearing from you.
I don't exactly know where I'm taking this project, I would like to turn it into a commercial product as there is very little available for high current 3phase controllers. At this time the design is closed source as it needs additional proving, but I'm tempted to open it up after some further development.
If you would like some references about my design, there are a few on this board who know about my work. They should be able to vouch for the validity of the concepts used in my design. I realize extraordinary claims require extraordinary evidence and I can prove my concept is viable through different test apparatuses I have built.
If you don't know who I am, please search my posts, especially those involving controller design to get an idea of my skills and personality. I like to push limits, but without breaking rules (maybe bending them). Feel free to contact me by PM. I'm looking to form a small group to make this happen, and hopefully have a lot of fun geeking out.
Link to one of my recent designs, unrelated to the high current design mentioned here.
https://endless-sphere.com/forums/viewtopic.php?f=30&t=106688
There are a bunch of challenges involved, many which it appears I've already overcome, but I've come to the conclusion that I'm not able to go at this solo as I have been trying to for so many years. One of the larger challenges is controller development. I really desire to run a custom controller built around TI's Instaspin FOC. Instaspin has a steep learning curve (shaped like a cliff) just to handle simple tasks like getting a throttle setup and having the code execute upon boot, however I've made it past most of these hurdles, and have several dents in the walls shaped like my head in various locations throughout my office from getting stuck. The reason for developing with Instaspin is due to needing some customized control to accommodate some of the ideas I've come up with. Right now I'm working to get a VESC based controller working and have the hardware designed. Making this hardware compatible with Instaspin is fairly straight forward as I made my controller modular. I'm hoping VESC is simple a stop gap on the way to more advanced ideas.
I have built a full scale half bridge using 9 paralleled TO-247 devices and through double pulse testing have verified near equal current sharing among all devices. Since that design several years ago, I've managed to shrink it to a much smaller scale and improve upon it as well as increase the MOSFET count up to 24 TO-220 devices.
If you have a background in any of the following and are a highly self motivated individual:
programming C
motor controller design / algorithms
power electronics
production / manufacturing
business contacts
machining (I need custom aluminum and possibly copper parts made)
if you think you have skills which you could contribute I'd be interested in hearing from you.
I don't exactly know where I'm taking this project, I would like to turn it into a commercial product as there is very little available for high current 3phase controllers. At this time the design is closed source as it needs additional proving, but I'm tempted to open it up after some further development.
If you would like some references about my design, there are a few on this board who know about my work. They should be able to vouch for the validity of the concepts used in my design. I realize extraordinary claims require extraordinary evidence and I can prove my concept is viable through different test apparatuses I have built.
If you don't know who I am, please search my posts, especially those involving controller design to get an idea of my skills and personality. I like to push limits, but without breaking rules (maybe bending them). Feel free to contact me by PM. I'm looking to form a small group to make this happen, and hopefully have a lot of fun geeking out.
Link to one of my recent designs, unrelated to the high current design mentioned here.
https://endless-sphere.com/forums/viewtopic.php?f=30&t=106688