Probably current sensing for some form of load sensing.
What type of motor do these use?
- Thread starter Chetlaham
- Start date
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Control board is to start motor and keep it running with the least amount of power consumption, and to make it run in the correct direction.
I obtained a good blower for nothing when a TV station replaced their RCA transmitter with a new one. I repaired the old one they scrapped-spent a lot of time on it.So--when it was replaced they let me salvage stuff from it.Got some of the tubes-I collect transmitting tubes.Then I got the blower that cooled the diplexer assembly-this combines the outputs of the sound transmitter with the visual one-this was an analog Tx.The blower is a heavy cast iron fancase-1/3 hp 120/240V motor.The fan is cast aluminum.I have it in my goodies pile with thpoughts of using it as a dust collector fan.Price---FREE!
I wonder and hope this man only runs his homemade fan only when he is in the shop.Yes,don't think that plastic motor will last long with plastic on plastic with no water "lubrication".Oil can soften the plastic or even dissolve it!Same with grease-you could try silicone grease.Oh on that transmitter-the double sided blower-two fans and fancases on one motor-this cooled the visual driver and PA was a 480V 3ph motor at 7Hp.Left it because I couldn't use it.The poor transmitter looked kinda sad on the curb-dumpted like an old washer or dishwasher.Later scrappers took the rest.Was purchased in the 80's.
I wonder and hope this man only runs his homemade fan only when he is in the shop.Yes,don't think that plastic motor will last long with plastic on plastic with no water "lubrication".Oil can soften the plastic or even dissolve it!Same with grease-you could try silicone grease.Oh on that transmitter-the double sided blower-two fans and fancases on one motor-this cooled the visual driver and PA was a 480V 3ph motor at 7Hp.Left it because I couldn't use it.The poor transmitter looked kinda sad on the curb-dumpted like an old washer or dishwasher.Later scrappers took the rest.Was purchased in the 80's.
pond pumps indeed.........
Upon thinking about this more, and watching that video.......
I hope many on here go watch that video a 2nd time, maybe three times.
I can't count how many times people were arguing in threads about when these little "puny pond pumps" were put in dishwashers, and everyone was crowing about cheap and weak they were.
Did you see the video?
That thing was running at full 3400-3600 rpm whether unloaded or very heavily loaded with a WOOD impeller pushing 6in dia.
That's a ton of drag for a little 55w motor.
And in some instances it was overdrawing to maintain speed.
The torque on that thing must be pretty good.
That's how you get your good water pressure from a dinky "pond pump."
Upon thinking about this more, and watching that video.......
I hope many on here go watch that video a 2nd time, maybe three times.
I can't count how many times people were arguing in threads about when these little "puny pond pumps" were put in dishwashers, and everyone was crowing about cheap and weak they were.
Did you see the video?
That thing was running at full 3400-3600 rpm whether unloaded or very heavily loaded with a WOOD impeller pushing 6in dia.
That's a ton of drag for a little 55w motor.
And in some instances it was overdrawing to maintain speed.
The torque on that thing must be pretty good.
That's how you get your good water pressure from a dinky "pond pump."
The "pond Pump" is now delivering air suction and pressure now.Would like to see some CFM and air pressure readings on that repurposed dishwasher motor now a blower motor.Yes,guess for 55W its doing pretty good.Just wait until the motor gets full of sanding dust and sawdust!
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