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Post by John on May 6, 2016 15:48:24 GMT -5
Just a bit of fun!!
Solar Powered shearer.
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Post by dazbt on May 7, 2016 5:20:58 GMT -5
Just a bit of fun!!
Solar Powered shearer. Ah but ................ solar power (photovoltaic cells) have been used on shearer applications !! |
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Clive
Shotfirer.
Posts: 168
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Post by Clive on May 7, 2016 7:51:28 GMT -5
Recruitment officer
Long term career adviser
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Post by John on May 7, 2016 8:04:59 GMT -5
Recruitment officer Long term career adviser |
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Post by John on May 7, 2016 8:05:46 GMT -5
Just a bit of fun!!
Solar Powered shearer. Ah but ................ solar power (photovoltaic cells) have been used on shearer applications !!  |
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Post by dazbt on May 7, 2016 9:20:30 GMT -5
Ah but ................ solar power (photovoltaic cells) have been used on shearer applications !! Used to power a working on-board components, so, yes to power them in part at least. |
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Post by John on May 9, 2016 10:31:58 GMT -5
But not to power them though.. Used to power a working on-board components, so, yes to power them in part at least.
I'm not trying to be clever, but are you getting mixed up with opto isolation devices, where a semi conductor encapsulated device incorporates an led with lense to a photo sensitive device to isolated one circuit from another?? Used where a low voltage circuit controls a higher voltage circuit, as one example of it's use. We can even get chips with these devices, can be used in power electric circuits to radio frequency circuits, and also for what we call in radio as "chopping" circuits, I won't go into detail on those, but basically an electronic tuning knob on a radio.
Then there are photo sensitive resistors, not used much these days, but found in street lighting to switch them on and off, were also used in lightmeters in photography. And pre opto solid state devices in circuit isolation.
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Post by dazbt on May 9, 2016 11:06:03 GMT -5
Used to power a working on-board components, so, yes to power them in part at least.
I'm not trying to be clever, but are you getting mixed up with opto isolation devices, where a semi conductor encapsulated device incorporates an led with lense to a photo sensitive device to isolated one circuit from another?? Used where a low voltage circuit controls a higher voltage circuit, as one example of it's use. We can even get chips with these devices, can be used in power electric circuits to radio frequency circuits, and also for what we call in radio as "chopping" circuits, I won't go into detail on those, but basically an electronic tuning knob on a radio.
Then there are photo sensitive resistors, not used much these days, but found in street lighting to switch them on and off, were also used in lightmeters in photography. And pre opto solid state devices in circuit isolation.
It was used to generate power (an electrical current) that was then used to operate a device on-board the shearer, whilst the shearer was either running or stood un-powered. |
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Post by John on May 9, 2016 11:33:05 GMT -5
This still puzzles me Daz, in all my years as an electrician, and also involved pretty heavily in electronics, both as a hobby and in my work, I have never come across photo voltaic devices other than in power generation.
I'm not trying to be clever, but are you getting mixed up with opto isolation devices, where a semi conductor encapsulated device incorporates an led with lense to a photo sensitive device to isolated one circuit from another?? Used where a low voltage circuit controls a higher voltage circuit, as one example of it's use. We can even get chips with these devices, can be used in power electric circuits to radio frequency circuits, and also for what we call in radio as "chopping" circuits, I won't go into detail on those, but basically an electronic tuning knob on a radio.
Then there are photo sensitive resistors, not used much these days, but found in street lighting to switch them on and off, were also used in lightmeters in photography. And pre opto solid state devices in circuit isolation.
It was used to generate power (an electrical current) that was then used to operate a device on-board the shearer, whilst the shearer was either running or stood un-powered.
Have you or can you point me to some literature on it?? Might enlighten me somewhat, like I say, I'm not trying to be clever, I've probably missed something, due to never having seen voltaic cell's used in anything other than power generation, ie from the sun.
I once tried to design a blocked chute probe using a light sensitive resistor and a light beam, but back then I had only basic electronics knowledge and I came up against a problem I just didn't have the time to overcome. Today I could design and build one, but, there's no use for one nowadays. |
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Post by dazbt on May 9, 2016 12:33:13 GMT -5
I could point you in the direction of a patent that highlights the basic concept but the actual application I refer to was a further extension of that principle, keep thinking John, but, then again I could be pulling your leg or, even totally wrong  |
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Post by John on May 9, 2016 13:02:57 GMT -5
I could point you in the direction of a patent that highlights the basic concept but the actual application I refer to was a further extension of that principle, keep thinking John, but, then again I could be pulling your leg or, even totally wrong
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Post by John on May 11, 2016 8:44:49 GMT -5
OK I'm going to stick my neck out here, as I cannot find any info as regards to voltaic cells being used in mining equipment.
The AM500 had operator stations each end for the drivers to increase or decrease haulage speed at the press of a button, a signal was received from the push button by the haulage speed control module, that controlled the swashplate pump, with a loop feedback circuit.
Not having been privy to seeing the schematics of the modules, as Anderson Strathclyde wouldn't release these. Not that it mattered to the electrical engineering staffs, as it was fairly obvious when a module went faulty by the machine doing some peculiar things, so the module was swapped out on a maintenance shift. Luckily the design engineer allowed for manual over ride.
Some of the components within these modules would have to have been "opto-isolators" essentially an LED and a "phototransistor" essentially a complicated solar module in miniature in one tiny chip.
The idea is to isolate a low voltage circuit from a higher voltage circuit by using a light source and a light sensitive "pick up".
Very similar to a electro mechanical relay, but far more reliable and infinitely smaller.
Is this what you mean Daz???
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Post by dazbt on May 11, 2016 9:51:54 GMT -5
I could point you in the direction of a patent that highlights the basic concept but the actual application I refer to was a further extension of that principle, keep thinking John, but, then again I could be pulling your leg or, even totally wrong
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Post by dazbt on May 11, 2016 9:54:17 GMT -5
OK I'm going to stick my neck out here, as I cannot find any info as regards to voltaic cells being used in mining equipment.
The AM500 had operator stations each end for the drivers to increase or decrease haulage speed at the press of a button, a signal was received from the push button by the haulage speed control module, that controlled the swashplate pump, with a loop feedback circuit.
Not having been privy to seeing the schematics of the modules, as Anderson Strathclyde wouldn't release these. Not that it mattered to the electrical engineering staffs, as it was fairly obvious when a module went faulty by the machine doing some peculiar things, so the module was swapped out on a maintenance shift. Luckily the design engineer allowed for manual over ride.
Some of the components within these modules would have to have been "opto-isolators" essentially an LED and a "phototransistor" essentially a complicated solar module in miniature in one tiny chip.
The idea is to isolate a low voltage circuit from a higher voltage circuit by using a light source and a light sensitive "pick up".
Very similar to a electro mechanical relay, but far more reliable and infinitely smaller.
Is this what you mean Daz??? Errr, no, now't like that J. |
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Post by dazbt on May 29, 2016 15:49:20 GMT -5
No further thoughts on photovoltaic onboard shearer applications then John? Let me know when you have your new cap lamp up and running and I'll attempt to illuminate the way in which it could play a part in providing a power source to operate a shearer onboard functioning system ................. keyword clues; fibre optics, FLP / IS, oil, thin seam access |
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Post by John on May 30, 2016 7:29:52 GMT -5
No further thoughts on photovoltaic onboard shearer applications then John? Let me know when you have your new cap lamp up and running and I'll attempt to illuminate the way in which it could play a part in providing a power source to operate a shearer onboard functioning system ................. keyword clues; fibre optics, FLP / IS, oil, thin seam access
Until you post the info on the Anderson Strathclyde system, I can't make a comment any more than I already have.
Fibre optics use led sources which are modulated via an amplifier, it can be audio, but more usually digital, at very high frequencies, the signal is transmitted via fibres of glass, terminated at some point via a "receiver" which is an opto electric device, call it a two legged transistor for want of a better pair of words, the light is focused on the devices junction, using a lens, this in turn makes the junction, witch "switches" on or off, that in turn operates an amplifier.
I don't know, but I feel this is what you're on about?? |
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Post by ncbnik on May 30, 2016 10:01:21 GMT -5
Not wanting to 'brown nose' but I'm generally in agreement with John on this one; PHOTO-VOLTAIC as opposed to photo-conductive or photo-resistive has few applications other than generation/power supply. What most folk regard as photo-cells are really devices which vary their conductivity dependant on picked up light (photo-transistors etc) - they are part of an external circuit. I did hear tell of a small photovoltaic cell used in the optical soundtrack reproducer in film projectors but never actually checked it and it may well have really been a phototransistor and the person telling me mis-understood the term.
And all this started off as a joke! - I'm off now to get a SKY HOOK and a LONG STAND...
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Post by dazbt on May 31, 2016 5:14:18 GMT -5
Not wanting to 'brown nose' but I'm generally in agreement with John on this one; PHOTO-VOLTAIC as opposed to photo-conductive or photo-resistive has few applications other than generation/power supply. What most folk regard as photo-cells are really devices which vary their conductivity dependant on picked up light (photo-transistors etc) - they are part of an external circuit. I did hear tell of a small photovoltaic cell used in the optical soundtrack reproducer in film projectors but never actually checked it and it may well have really been a phototransistor and the person telling me mis-understood the term. And all this started off as a joke! - I'm off now to get a SKY HOOK and a LONG STAND... Oh ye of little faith and foresight ....................  |
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Post by smshogun on Oct 10, 2016 20:15:05 GMT -5
They did experiment with kinetic energy power generation for powering cadmium cells years ago, AS did fit them to some machines with the roof follower arms which followed the roof and ranged the drums up and down to cut in straight lines, never knew what happened to them though.
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