Hello -
I am working on a project where we are building an in-running BLDC motor from 12 individual coils. Where each coil - will possess its own driver and will be activated by its own proximity sensor (NJK-5001c or NJK-5002a). For this motor - speed and force are important. So for all intents and purposes I would like to find a driver which can hit the coils as fast and hard as possible. I understand that "fast" and "hard" are relative aspects - and that I am really limited by my power supply and the coils themselves. And that heat is also a trade-off as well. So for now - im just trying to find a good driver which can at least get me moving in the right direction in terms of Speed and Force.
The power supply I currently have on hand is an adjustable DC 30v - 5a.
The coil when measured with a LCR says 3.5ohms and 5.7mh.
The driver I currently have - For the most part just functions with the proximity switch. And produces almost no force at all. I can wave a PM in front of it - and the solenoid activates and that's about it. It consist of an n4007 a 100R a 100uf 35v and a TIP42C. I have read around and seen various designs - and read a thread on this forum called "hit and hold solenoid". However I am not very well versed in electronics nor its practice or theory. So I dont know if im looking in the right place or need to a design a completely different driver specifically for what I am after. Likewise - I have failed to adapt any of the solenoid drivers I have seen - to make use of the proximity sensor on my own. From what I have gathered - I need to use faster switching components - like a mostfet over the BJT - and fast recovery diodes. As well put one diode in reverse/parallel to kill the back emf? The speeds I am after are around 5-25ms. Depending on the force I can generate. I am also hoping their is enough downtime in between activation - to potentially generate more force for my coil? If anyone has any designs they could assist with or can point me in the right direction I would greatly appreciated. I also apologize in advance if I asked for one thing and explained something completely different.
I am working on a project where we are building an in-running BLDC motor from 12 individual coils. Where each coil - will possess its own driver and will be activated by its own proximity sensor (NJK-5001c or NJK-5002a). For this motor - speed and force are important. So for all intents and purposes I would like to find a driver which can hit the coils as fast and hard as possible. I understand that "fast" and "hard" are relative aspects - and that I am really limited by my power supply and the coils themselves. And that heat is also a trade-off as well. So for now - im just trying to find a good driver which can at least get me moving in the right direction in terms of Speed and Force.
The power supply I currently have on hand is an adjustable DC 30v - 5a.
The coil when measured with a LCR says 3.5ohms and 5.7mh.
The driver I currently have - For the most part just functions with the proximity switch. And produces almost no force at all. I can wave a PM in front of it - and the solenoid activates and that's about it. It consist of an n4007 a 100R a 100uf 35v and a TIP42C. I have read around and seen various designs - and read a thread on this forum called "hit and hold solenoid". However I am not very well versed in electronics nor its practice or theory. So I dont know if im looking in the right place or need to a design a completely different driver specifically for what I am after. Likewise - I have failed to adapt any of the solenoid drivers I have seen - to make use of the proximity sensor on my own. From what I have gathered - I need to use faster switching components - like a mostfet over the BJT - and fast recovery diodes. As well put one diode in reverse/parallel to kill the back emf? The speeds I am after are around 5-25ms. Depending on the force I can generate. I am also hoping their is enough downtime in between activation - to potentially generate more force for my coil? If anyone has any designs they could assist with or can point me in the right direction I would greatly appreciated. I also apologize in advance if I asked for one thing and explained something completely different.