Question regarding creating a boost circuit, 24 to 200V for a solenoid

[johnvig]

I am building a boost circuit which should boost from 24v to 200v to fire a solenoid to kick a ball. I have found the parts and put together the schematic and want to know of this would work and if there would be any parts that you would recommend to add for safety, like fuses or more capacitors and resistors, etc. I have tested in simulation and it seems to work, I have an image of the schematic here and the name of the components next to each of them. Also would like to mention that I will make a pcb out of it, so any advice on that would also be helpful, I will try to make the paths as thick as possible for the high current and close to reduce any noise and losses.

 

[danadak]

1) How are you going to turn off the SCR ?

https://www.lscollege.ac.in/sites/default/files/e-content/Silicon%20Controlled%20Rectifier%20%28SCR%29%2C%20Lecture%20-%2013%2C%20TDC%20Part%20-%20I%2C%20Paper%20-%20II%2C%20%28Group%20-%20B%29%2C%20Chapter%20-%205%2C%20SCR%20Turning-OFF%20Methods%2C%20PART%20-1%2C%20By%20-%20Dr.%20Niraj%20Kumar_0.pdf

SCR Manual : General Electric : Free Download, Borrow, and Streaming : Internet Archive

General Electric SCR Manual

archive.org

 

[Delta Prime]

Schematically the simulation never worked! this is not the route you want to take you are better off buying off the The shelf.

 

[johnvig]

1) How are you going to turn off the SCR ?

https://www.lscollege.ac.in/sites/default/files/e-content/Silicon%20Controlled%20Rectifier%20%28SCR%29%2C%20Lecture%20-%2013%2C%20TDC%20Part%20-%20I%2C%20Paper%20-%20II%2C%20%28Group%20-%20B%29%2C%20Chapter%20-%205%2C%20SCR%20Turning-OFF%20Methods%2C%20PART%20-1%2C%20By%20-%20Dr.%20Niraj%20Kumar_0.pdf

SCR Manual : General Electric : Free Download, Borrow, and Streaming : Internet Archive

General Electric SCR Manual

archive.org

This is my current schematic, I fixed some issues. Regarding the SRC I realize the current needs to be close to 0 for it to turn off, would you then recomend something like the mosfet and the gate driver again? I want the solenoid to fire once the capacitor is charged for a quick and strong kick on a ball and then return.

 

[johnvig]

Schematically the simulation never worked! this is not the route you want to take you are better off buying off the The shelf.

The simulation was on the main components to realize the switching frequency and such, not with the logic mosfet to turn off or the src, maybe I should try that aswell, but also there are no of the shelf components for my purpose, once some I found in aliexpress, like these https://www.aliexpress.com/p/tesla-...OdgvGvDD7kBsRfK05tBO9Yi4wfVIsrghoCPPUQAvD_BwE I found, which I dont want to buy.

 

[danadak]

What is the current requirements of the solenoid ? 200V is needed for solenoid ?

Given the actuation is effectively a very low frequency event you may be able to
get away with no gate driver. There are several considerations that must be dealt
with, the high C and Miller effects of the MOSFET gate can cause some power
power rail spiking inside the Nano, of course turn on time due to limited Nano
drive current, need for low value gate R to suppress oscillation (20 - 50 ohms),
possible parallel Nano pins to supply more gate drive (must observe its power
rail current limit).....

 

[Sunnysky]

Can you please measure/share the load resistance?

I am also curious. Is this a commercial unit modification?
An exponential Cap decay with an inductive solenoid and a mechanical load, ought to be well damped. The force profile may not mimic ideal performance with max velocity and low jerk.

I imagine if the kick cycle time is reduced, there may be other potential issues like self-heating and kick/return time adequate? Forward Torque, Return torque.

Any spec details would help.

 

[WHONOES]

Can you please describe exactly what you are trying to do with your circuit. A proper circuit description detailing the contribution of each component would be a bonus.
Is your device intended to run continuously or only upon a prompt from its user?

What is the purpose of the inductor in the power supply line?
As you surmised, the SCR will not switch off of its own accord. A Mosfet would be a better alternative.

 

[ivak245]

Can you use a 24 volt solenoid?

 

[Delta Prime]

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