Effects of using 50 Hz power on a 60 Hz device.

Hankmars2

Sep 14, 2023
1
What can be the expected results if I power my chest freezer compressor with a 50 Hz power supply instead of 60 Hz sine wave?

Alec_t

Jul 7, 2015
3,584
Welcome to maker.pro!
Assuming the compressor is rated for 60Hz the most obvious result would be a speed reduction. Depending on the motor, its windings might overheat because of a reduction in their impedance.
Is the voltage the same for the two supplies?

Last edited:

Delta Prime

Jul 29, 2020
1,810
What can be the expected results if I power my chest freezer compressor with a 50 Hz power supply instead of 60 Hz sine wave?
If you're 50 HZ power supply is a sine wave and the voltages are the same.Speed (RPM) and power output rating will be 6/5 times the 50 Hz values, and core and windage losses will be a little bit higher.
That only leads to a whole bunch of other questions.

Last edited:

HANKMARS

Jul 28, 2019
498
Welcome to maker.pro!
Assuming the compressor is rated for 60Hz the most obvious result would be a speed reduction. Depending on the motor, its windings might overheat because of a reduction in their impedance.
Is the voltage the same for the two supplies?
Yes, ~= 110 VAC.

HANKMARS

Jul 28, 2019
498
If you're 50 HZ power supply is a sine wave and the voltages are the same.Speed (RPM) and power output rating will be 6/5 times the 50 Hz values, and core and windage losses will be a little bit higher.
That only leads to a whole bunch of other questions.
As I understand it, if there were no losses a typical induction motor would spin at 3600 rpm (or 1800 rpm depending upon how many poles are wound). Due to "slip" motors of this type will be rated at 3550 and 1725 rpm, respectfully. Another person found a statement saying power out would be reduced by 20%. That may correspond to the 6/5 x 50Hz above. At 60 Hz, 110 VAC, this motor draws 134 W. A lower impedance in the windings may demand more power which would perhaps offset a 20% drop in power out resulting in a power draw of 160 W. That may be tolerable.

Delta Prime

Jul 29, 2020
1,810
As I understand it, if there were no losses a typical induction motor would spin at 3600 rpm (or 1800 rpm depending upon how many poles are wound). Due to "slip" motors of this type will be rated at 3550 and 1725 rpm, respectfully. Another person found a statement saying power out would be reduced by 20%. That may correspond to the 6/5 x 50Hz above. At 60 Hz, 110 VAC, this motor draws 134 W. A lower impedance in the windings may demand more power which would perhaps offset a 20% drop in power out resulting in a power draw of 160 W. That may be tolerable.
That was the long-winded version of what I have posted.
Off topic:
I got a question for you?
How do you go from this;

To this?;

I only asked cuz I would like to get @Alec_t to welcome me in writing.It'll be like signing my autograph book. I say that in the best possible way.

Last edited:

HANKMARS

Jul 28, 2019
498
That was the long-winded version of what I have posted.
Off topic:
I got a question for you?
How do you go from this;
View attachment 60750

To this?;

View attachment 60751

Delta Prime

Jul 29, 2020
1,810
I misspoke.
That was the long-winded version of what I have posted.
Thank you for the correction.

It is I who is at fault.... Believe me.

Martaine2005

May 12, 2015
4,905
I misspoke.

Thank you for the correction.

It is I who is at fault.... Believe me.
I believe you!

Martin

Alec_t

Jul 7, 2015
3,584
I only asked cuz I would like to get @Alec_t to welcome me in writing.It'll be like signing my autograph book. I say that in the best possible way.
You probably got a welcome 1168 posts ago as a newbie to the site. If not, then welcome to maker.pro!

Martaine2005

May 12, 2015
4,905
1167 of them being illegible.
Nah, just kidding!.

Jul 29, 2020
1,810

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