Chris Campbell Posted December 16, 2022 Share Posted December 16, 2022 Not much looking on my own. Looking for a source to pick up a step down transformer from 110v to 60v-64v range. Worst case could two 110v to 32v be configured to generate 64v? Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted December 16, 2022 Share Posted December 16, 2022 Are you seeking 60 VDC or AC? Quote Link to comment Share on other sites More sharing options...
Chris Campbell Posted December 16, 2022 Author Share Posted December 16, 2022 2 minutes ago, Russ Huber said: Are you seeking 60 VDC or AC? VDC, but AC could bridge over if needed Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted December 16, 2022 Share Posted December 16, 2022 Go to Amazon and put in "60 volt DC charger". Take your pick for what trips your trigger. Quote Link to comment Share on other sites More sharing options...
John McComas Posted December 16, 2022 Share Posted December 16, 2022 (edited) What size fan? Half wave single rectifier... (maybe add a small capacitor if motor runs too rough.) or: Used control transformer (240 to 120)... feed 120 into the 240 side and get 60 on the 120 side. Good luck Edited December 16, 2022 by John McComas 1 Quote Link to comment Share on other sites More sharing options...
Chris Campbell Posted December 16, 2022 Author Share Posted December 16, 2022 1 minute ago, John McComas said: half wave single rectifier... (maybe add a small capacitor if motor runs too rough.) Used control transformer (240 to 120) feed 120 into the 240 side and get 60 on the 120 side. Good luck Never thought of this. So 240 to 120 reversed will drop into 60? Quote Link to comment Share on other sites More sharing options...
John McComas Posted December 16, 2022 Share Posted December 16, 2022 It's the old turns ratio Transformer thang. 2:1 Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted December 16, 2022 Share Posted December 16, 2022 (edited) In past I had 60 VDC 12" Jandus roundball. I was looking at one of these examples of a 60 VDC electric scooter chargers in the past to run it. I didn't have the fan long enough to get one. Couldn't one of these be made to work to operate the fan if the output coupler was modified to 2 line power? 60 Volt 3.0 Amp 3-Prong Battery Charger (Standard) - Monster Scooter Parts Edited December 16, 2022 by Russ Huber Quote Link to comment Share on other sites More sharing options...
John McComas Posted December 16, 2022 Share Posted December 16, 2022 5 minutes ago, Russ Huber said: In past I had 60 VDC 12" Jandus roundball. I was looking at one of these examples of a 60 VDC electric scooter chargers in the past to run it. I didn't have the fan long enough to get one. Couldn't one of these be made to work to operate the fan if the output coupler was modified to 2 line power? 60 Volt 3.0 Amp 3-Prong Battery Charger (Standard) - Monster Scooter Parts Some of the "smart" or switching type chargers may, or MAY NOT like being wired to a fan... The key phrase that bothers me is "automatic shutoff" That implies charger has some smarts, and may not work if it doesn't see some residual battery voltage. Don't get me wrong, I love the light weight and efficiency of switching supplies and chargers, but they might not work with old motors. Sometimes old "brute force" designs are needed. "May the juice be with you!" Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted December 16, 2022 Share Posted December 16, 2022 2 minutes ago, John McComas said: Some of the "smart" or switching type chargers may, or MAY NOT like being wired to a fan... The key phrase that bothers me is "automatic shutoff" That implies charger has some smarts, and may not work if it doesn't see some residual battery voltage. Don't get me wrong, I love the light weight and efficiency of switching supplies and chargers, but they might not work with old motors. Sometimes old "brute force" designs are needed. "May the juice be with you!" My bet, the higher percentage is on the "may" side of the coin. The fan will never send a message back to the charger it is fully charged. No need for a rectifier either. 🙂 Quote Link to comment Share on other sites More sharing options...
Chris Campbell Posted December 16, 2022 Author Share Posted December 16, 2022 What would be ideal is to find a coil that can build decorative box to conceal. Rather dodge the bulky printer transformers. Thinking a doughnut coil step up wired opposite would work, just now need to find a coil Quote Link to comment Share on other sites More sharing options...
Jim Kovar Posted December 16, 2022 Share Posted December 16, 2022 (edited) I have never had a problemrunning any AC/DC universalmotor on half-wave DC. Easy and cheap!,... ...that's me. Edited December 16, 2022 by Jim Kovar Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted December 16, 2022 Share Posted December 16, 2022 5 minutes ago, Chris Campbell said: What would be ideal is to find a coil that can build decorative box to conceal. Rather dodge the bulky printer transformers. Thinking a doughnut coil step up wired opposite would work, just now need to find a coil You can hide "anything" with a little imagination, Chris. The tag on the transformer was made with my instruction by Donald Coleman. The vented transformer has a new transformer in it hard to see unless you stuck your face up to it. And.........the vented box was not a transformer box to start. I think you get where I'm going. 🙂 Good luck! Quote Link to comment Share on other sites More sharing options...
Jim Kovar Posted December 16, 2022 Share Posted December 16, 2022 Photo credit: Steve Dempsey 120VAC in,... 60VDC out. Quote Link to comment Share on other sites More sharing options...
Russ Huber Posted December 16, 2022 Share Posted December 16, 2022 (edited) 6 hours ago, Jim Kovar said: Photo credit: Steve Dempsey 120VAC in,... 60VDC out. Actually, that is my photo. I tried running/rectifying a 12" DC fan on a half wave diode once, that didn't work to well. I don't know why, but it didn't run worth a $hit. The half wave diodes work great for rectifying/slowing down the little fans. They work great on the little fans for a second slower speed. Edited December 17, 2022 by Russ Huber Quote Link to comment Share on other sites More sharing options...
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