Thread Number: 81813
/ Tag: Refrigerators
Two-Phase motors for fridge condenser fans.... |
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Post# 1058267 , Reply# 1   1/21/2020 at 06:50 (1,555 days old) by retro-man (- boston,ma)   |   | |
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Thanks for the info. You have a wealth of knowledge and I appreciate that you are sharing this with us. I always look forward to your videos and explanations that we can all understand. This is like the adult version of show and tell. Keep them coming my friend. Jon |
Post# 1058271 , Reply# 2   1/21/2020 at 08:53 (1,555 days old) by turbokinetic (Northport, Alabama USA)   |   | |
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Thanks Jon, I appreciate it and will keep making videos as time allows! |
Post# 1058491 , Reply# 3   1/23/2020 at 07:38 (1,553 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Great video David, Some may wonder why GE, Westinghouse went to the trouble of using 2 phase fan motors when few other makers did so on their refrigerators ?
It took better engineering and companies that built more of the overall appliance to do this first of all because the operation of the fan motor was designed to operate with the compressor.
Why Brother, These 2 phase fan motor had several important advantages.
1 Higher starting torque, less chance of not running, better reliability.
2 Lower power consumption once started and running.
3 Cooler running = longer motor and bearing life.
The lower power consumption was probably the most important reason. There was a lot of competition among refrigerator builders to build refrigerators that were economical to run, we have all seen refrigerator advertising that talks about how reasonable their refrigerator is to run.
Frigidaire always talked about their Meter-Miser for example and FD did not use condenser fan motors on their home refs till the mid 60s at all to keep down power consumption.
GE & WH went for the higher performance that having a condenser fan motor allowed when designing a refrigerator and went to the extra trouble to design it to operate economically.
How much power do these little motor actually draw anyway. I typical 2 wire condenser fan motor from a 60-70s refrigerator would draw around 45 watts, these 2 phase CFMs would shave off around 15 watts and draw around 30 watts.
Today a new refrigerator with an ECM CFM only draws about 5 watts, these new motors don't even get warm to the tough and will probably outlast the refrigerator easily.
John L. This post was last edited 01/23/2020 at 09:19 |
Post# 1058752 , Reply# 4   1/25/2020 at 03:53 (1,551 days old) by statomatic (France)   |   | |
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