ebeowulf17
- Joined Aug 12, 2014
- 3,307
Not if 240vdc coils are available.Although, it opens up a BIG can of worms. In order to replace those coils, you'd have to come up with a 24VDC source, then wire something up so that the 230V coil signals from the machine can control the 24V outputs (relays? AC input SSRs?) If you're designing your own system, it makes sense to spec the parts the way you want them, but adapting your coil preferences into an existing espresso machine that has all the wrong voltages and none of the right ones, plus no room under the hood for extra parts, would be difficult. And all that inside a machine where they're concerned about voiding the warranty...
What then, rectify the AC? Still pulsing... then filter it? But now it's 340VDC. I must be missing something. I don't see how this is a simple swap, nor what benefit it provides in this context.Not if 240vdc coils are available.
Max.
Ok, that answers the benefit. I forgot about that aspect. Thanks!No filter, the SS400 will detect the DC.
The current does not collapse to zero.
Max.
Won't that just make full wave rectified pulses... still generating pulses, not a continuous signal, on the Hall sensor?Just a small bridge.
Max.
I gotcha. Sorry I was a little slow piecing the puzzle together. Thanks for the explanations!They are switched with a magnetic field, in this case it does not normally collapse to zero at 120Hz.
Max.
SS495a are linear output version, I would have though you needed one of the digital (on/off) version?Honeywell ss495a Hall effect sensors. There’s some wait but I expect they’ll arrive beginning of next week.
Melvin
Thank you for pointing that out Max. I’ve ordered stuff before looking into it well because I’m impatient. Also, it’s difficult to get such electronic components over here in The Netherlands without paying stupidly high shipping prices, so I kinda ordered whatever I could find for a “reasonable” price (paid about 10usd for 2 of them, so still kinda expensive). I’m just eager to play around with the sensors and microcontroller. Will look into it more and order a digital version as well.SS495a are linear output version, I would have though you needed one of the digital (on/off) version?
Max.
Simulation shows that simply applying 230VAC through a bridge to a 230VAC rated solenoid results in much greater power being dissipated in the solenoid. It certainly wouldn't like that . The warranty would be voided.Just a small bridge
It included the idea of changing out the coil to 240vdc!Simulation shows that simply applying 230VAC through a bridge to a 230VAC rated solenoid results in much greater power being dissipated in the solenoid. It certainly wouldn't like that . The warranty would be voided.
There is a bi-polar, uni-polar and latch-unlatch by polarity reversal types.. I’m just eager to play around with the sensors and microcontroller. Will look into it more and order a digital version as well.
From what I read there is also omnipolar, such as the Honeywell ss451a, and from what I understand, that would be perfect for my application.There is a bi-polar, uni-polar and latch-unlatch by polarity reversal types.
Max.
Although, if the microcontroller they're paired with has a decent ADC, this might actually be better!SS495a are linear output version, I would have though you needed one of the digital (on/off) version?
Max.