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| Daisy chain power supply design |
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| Garn3:
Hello everyone, I need your help on design a « power supply ». Context : We are working on a product that we might sell one day : a grow light. We want to be able to daisy chain them and in order to reduce the weight and the cost, I want to « put out » the heavy and costly stuff. Basically put the transformer outside the devices. The transformer circuit will deliver 48V AC and up to 20A. One main grow light will be connected on it. And another power supply circuit in this grow light will make that 48V AC into 48V DC regulated and be able to deliver up to 2A. And another grow light can be connected on that one (but it will take the power directly from the main source) etc etc. But I dont know if what I am trying to do is possible and really cheaper and practical. Please look at the attachements for more information. And please let me know what you think about it. If you have any question, please feel free to ask. Thank you for your help. Niels (Sorry for my english) |
| Cliff Matthews:
Welcome, FWIW this would have been better posted in the beginners section. 1200VA Transformers are NOT cheap commodity items. They are costly, heavy, and kind of prehistoric for this application. Also, doing chaining this way forces you into using 20+ ampere (thick, costly no so flexible) cable and chaining connectors. Since environment specified can be prone to humidity, try using sealed fan-less units such as the Mean Well HEP-100 or HEP-150 |
| ejeffrey:
I agree that using a 230 V to 48 VDC/2A power supply on each module likely the best option. There is no reason to use 48 VAC distribution here that I can see. If you really needed to keep the power supply away from the grow lamps use a huge 48 VDC power supply. You will still be stuck with thick expensive cables and connectors, but then there will really be almost no electronics inside the modules. |
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