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21st February 2019, 11:49 | #101 | ||||
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Still not proving your theory of high voltage spikes from a battery on connection/disconnection. Stating the formula, and saying how clever you are, doesn't make what you state as fact true. Where are the calculations to predict the size of the spike? (without which you don't even have a theory let alone proof). Where's the empirical evidence? (i.e. measurements of voltage spikes in the scenario being discussed). Quote:
I expect they follow the same manufacturing pattern as many (as in fact the company I work for does). The design and some samples will be tested at the HQ/Design/quality office/lab. But quality control for the majority will be at the production line in China. 'Very Different' is subjective I think. Brian will be able to tell you how different as he's actually disassembled one of the aldi chargers and compared. Quote:
I hardly think that's a relevant comparison, to compare these engines with electronics. Quote:
Pull the other one. You seem much more concerned with trying to baffle with alphabet soup and sound like you know what you are talking about than demonstrate that you actually do by experiment or calculation. Maybe you do, maybe I'm wrong: but I've only read abstract theories so far based on some quite broad assumptions and one formula. Go and do the predictive calculations (or go one better and find if they've already been done in a similar enough situation) and I might accept that you have a valid theory. If this is going down the scientific path it's down to you to prove it or at least show that the theory has legs.
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21st February 2019, 12:25 | #102 | |
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If you read back, you will note that I stated where I would/would not use one of these cheap chargers based on personal experience and views. I also highlighted a failure in my current Lidl charger. You by comparison stated " I have one of the Aldi CTEK copies which are amazing for the price". There is no evidence whatsoever that these chargers are copies of CTEK devices. This is pure misinformation which one presumes is intended to imply a level of sophistication and quality by association. I have actually done a strip down of my CTEK, Optimate and the Lidl chargers and there is no commonality between the Lidl chargers and the others whatsoever. You had stated that our cars do not have any large inductors other than other than the alternator. This of course is absolute rubbish as I listed a whole host of inductive components in the car. With the formula, what I showed was that you do not actually need large inductors as the rate of change of current also determines the amplitude of the induced transient. You, with your claimed knowledge, should be able to comprehend this. FYI - I generally try not to respond to your posts because of the aforementioned characteristic and will be trying even harder henceforth. Not worthy of my time or effort. Last edited by MSS; 21st February 2019 at 12:49.. |
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21st February 2019, 15:03 | #103 | |
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And all I did was accept that I'm open to being proven wrong if you could substantiate your assertion on voltage spikes with a bit more than a quoting a formula, Apparently not. I never claimed to fail to understand your theory (OK, once, in jest). Just that I fail to come to the same conclusion from what you've presented. As for getting personal: I can only comment on what I read (what you write) and call out any apparent contradictions as I see them. My comprehension or otherwise of your theory does nothing to substantiate it or prove that it's correct (or false). I don't comment to bait or flame, but rather to encourage you to express and prove (substantiate) your theory in a way that the wider readership could understand. If you don't want to do that, that's your right: in which case though my previous comment still stands: that you prefer to baffle with alphabet soup and sound like you know what you are talking about than demonstrate that you actually do by experiment or calculation. Remember that a theory is proven by.... proof, not lack of negation....
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21st February 2019, 18:30 | #104 | |
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If you believe that what I say is incorrect, you need to state why and if you feel so inclined, back it up with science/theory. The fact that the formula I wrote applies to transient generation from inductive loads would be understood by any AS-level physics student with any understanding of basic electromagnetic principles. The fact that you equated the formula to "spinning magnetic field" told me all that I needed to know of your understanding of the field. What you had stated was that other than the alternator, there were no large inductors (meaning capable of generating transients) in our cars. I listed a whole host that are present in all cars. You may care to study the following application note from Harris Semiconductor - people who design and manufacture transient suppressors for automotive applications - and note item 4 in the table on page 2, i.e. < 320μs Inductive-load Switching transient <1J -300v to +8-V often http://www.industrologic.com/autotransients.pdf What formula do you think applies when these are generated? If you wish, please state why you believe that the formula I stated does not apply as I stated, which was that it shows the amplitude of the generated transient is dependent on the rate of change of current (the dI/dt term) and the inductance does not have to be very large to to generate a large transient voltage. Even better, why don't you suggest a formula yourself? This should be easy for you given your extensive knowledge. I will leave it there, so that you can have the last post. I will say that when you don't understand something, a little less of the idiotic arrogance will go a long way! Last edited by MSS; 22nd February 2019 at 06:40.. |
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21st February 2019, 20:03 | #105 | |
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21st February 2019, 20:38 | #106 | ||
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Post No. 1 - Question
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21st February 2019, 20:44 | #107 | |
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Some may even call you an aero engine snob! Likewise, I am OS, Saito and Laser man. IMHO all three are masterpieces of engineering. My post was in relation to petrol engines before OS and Saito brought out their petrol ranges a few years ago. Hence the mention of Zenoah. Last edited by MSS; 22nd February 2019 at 06:43.. |
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21st February 2019, 20:50 | #108 |
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21st February 2019, 20:56 | #109 | |
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I've a cheap charger, and it works for me, and even if it didn't, I'm more than able to rectify any unforeseen problems. Having said that, I've no problem in recommending the use of the one I own, as it has been trouble free, including for the purpose of charging AGM batteries. Brian |
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21st February 2019, 20:56 | #110 | |
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Sorry to the OP for this pointless post. i'll shut up now. |
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