50 Hz vs 60 Hz and frequency changer

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Discussion Overview

The discussion centers around the differences between 50 Hz and 60 Hz electrical systems, particularly in relation to the functionality of electronic devices and appliances designed for these frequencies. Participants explore the implications for devices when used across different frequency grids, including the performance of motors and power supplies.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • Some participants note that electronic devices in the US typically operate at 60 Hz, while those in Europe operate at 50 Hz, raising questions about compatibility.
  • It is suggested that appliances like electric motors or pumps designed for 60 Hz will run slower when connected to a 50 Hz grid, but this may vary based on the type of appliance.
  • One participant mentions that the AC mains voltage differences (120Vrms @ 60Hz in the US vs. 220Vrms @ 50Hz in Europe) are a significant factor affecting device compatibility.
  • Concerns are raised about motors running directly from the line versus those using converters, with the performance potentially varying based on the quality of the converter.
  • Some devices, such as modern electronics and switched-mode power supplies, may be designed to operate across both frequency and voltage ranges without issues.
  • A participant shares a specific scenario regarding a Wii power supply rated for 240V and 50Hz, questioning its performance when used in a 240V and 60Hz network.
  • Another participant confirms that switched-mode power supplies generally do not depend on frequency, suggesting compatibility in this case.
  • There is a mention of the Philippines as a country that operates on a 240V and 60Hz network, indicating that such configurations do exist.

Areas of Agreement / Disagreement

Participants express varying views on the implications of using devices across different frequency grids, with some agreeing on the general behavior of motors while others highlight exceptions based on device design. The discussion remains unresolved regarding the broader implications for compatibility across different regions.

Contextual Notes

Limitations include assumptions about device design, the quality of converters, and the specific operational characteristics of different appliances. The discussion does not resolve the complexities involved in device compatibility across frequency and voltage differences.

TSN79
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Is it not correct that electronic devices in the US are typically 60 Hz, and 50 in Europe? Is so, I wonder about one thing; when talking about "normal" electronic appliances that you would have in your house, I always believed that something made for 60 Hz wouldn't work at all if you were on a 50 Hz grid. My company often installs pumps with frequency changers built in. These pumps apparently have their speed regulated by this frequency changer. Would it also then be true that an appliance or whatever made for 60 Hz would just run "slower" if it was to be connected to a 50 Hz grid??
 
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It depends on what type of "appliance" you are using.
If it is just an electric motor or pump it will simply run slower with more torque, but if there is an ac/ac drive you have to control if your converter is suitable for both frequency. Anyway, if you look at the data sheets you'll find the answwer
 
Also, the AC mains voltage is generally different between the US and Europe, and that is the more important reason that US (120Vrms @ 60Hz) and European (220Vrms @ 50Hz) devices may not work in the other location. It is possible to make universal switching power supplies that work across both frequency and input voltage ranges, however, and that is becoming more common for small appliances and devices (like laptop computer supplies).
 
Last edited:
berkeman said:
(22Vrms @ 50Hz)
220Vrms @ 50Hz
 
kishtik said:
220Vrms @ 50Hz

Oops, thanks for the typo fix!
 
If the motor made for 60Hz and used in 50Hz line, there might have some issues:
1. Assume the motor runs directly from line and has no converter. It takes 0.02sec to complete one cycle (one spin) for 50Hz line, and about 0.0166sec for 60Hz line. This means about 0.0034sec slower per spin.
2. If the motor has a converter or uses lower voltage than line (220vac or 115vac), it will denpend on how good the converter is. It will be OK if the converter has a good enough regulator. Otherwise, the motor will be slower tha expected.
 
The company I used to work for made instruments for sale in both the US and Europe. We built, and rated, everything for 115/230 VAC, 50/60Hz. Modern electronics can be built that way without any difficulty at all. Devices such as transformers or motors may not be built for multi-voltage, multi-frequency use.
 
Some transformers have multiple-tap inputs, to accommodate different input voltages (120Vrms and 230Vrms, for example).
 
I have a wii prower supply with the following specifications: 240V and 50hz and I will move to a country that has a network of: 240V and 60hz. I would like to know what are the consequences if I connect directy this power supply in the power network.
Thank you.
 
  • #10
jou_josmar said:
I have a wii prower supply with the following specifications: 240V and 50hz and I will move to a country that has a network of: 240V and 60hz.
It will work perfectly well, simple switched mode power supplies don't care about frequency.
Just out of interest are there any countries that use 240V/60Hz?
 
  • #11
Phillipines is a country with a network 240V/60Hz

by the way, thank you
 
  • #12
mgb_phys said:
just out of interest are there any countries that use 240v/60hz?
usa...?
 
  • #13
Phillipines is a country with a network 240V/60Hz
 

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