AC Mains frequency and microwave oven

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Discussion Overview

The discussion revolves around the impact of AC mains frequency on the performance of microwave ovens, particularly in the context of a user moving from a 50 Hz region (Europe) to a 60 Hz region (Philippines). Participants explore whether the frequency change is responsible for the microwave oven's failure to operate and discuss potential remediation options.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions if the frequency of the mains affects microwave performance and seeks clarification on the oven's specifications, particularly the input power requirements.
  • Another participant warns against running a 60 Hz appliance on a 50 Hz supply due to potential overheating hazards, although this is later clarified as not applicable in this case.
  • There is a discussion about the possibility of microwave ovens being triac controlled and how changing the mains frequency might affect their operation, with some uncertainty expressed regarding the variability between different oven models.
  • A participant notes that the turntable motor in the microwave, which is an induction motor, may behave differently at 60 Hz, potentially affecting its speed or causing it to stall.
  • Participants inquire about the symptoms of the microwave's failure, questioning whether it is completely non-functional or if it operates incorrectly.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the exact impact of frequency change on microwave operation, and multiple competing views regarding the functionality and specifications of the microwave oven remain present.

Contextual Notes

There are limitations regarding the assumptions about the oven's design, the specific electrical requirements, and the operational characteristics of the turntable motor that are not fully resolved in the discussion.

stilbiker
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Does the frequency of the main affect the performance of a microwave oven?
Having moved from Europe 50 Hz to the Philippines 60 Hz I can not operate my microwave oven!
Is that the reason? How to remediate?
Best regards.
 
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stilbiker said:
Does the frequency of the main affect the performance of a microwave oven?
Having moved from Europe 50 Hz to the Philippines 60 Hz I can not operate my microwave oven!
Is that the reason? How to remediate?
Best regards.
Welcome to the PF.

That would depend on the oven. What does it say on the back of the oven? There will be a label there with input power requirements. Europe is 50Hz 230Vrms, right? What is the AC Mains voltage in the Philippines? :smile:
 
BTW, trying to run a 60Hz appliance on 50Hz can present an overheating hazard, so please don't try it again until this is figured out.
 
berkeman said:
BTW, trying to run a 60Hz appliance on 50Hz can present an overheating hazard, so please don't try it again until this is figured out.
He is going the other direction.
 
Averagesupernova said:
He is going the other direction.
Yep, and he says the oven doesn't work at all.
(which I find a bit surprising - unless it caused the mains plug to blow it's fuse maybe)
 
Averagesupernova said:
He is going the other direction.
Oops, good point. Well forget about the overheating issue then... o0)
 
I think microwave ovens are triac controlled and synchronized to the mains, but I don't know how and whether changing the mains frequency will affect operation.
Could vary from oven to oven.
I'm assuming Europe and Philippines are both 230V

Also, the turntable motor is a 50Hz induction motor so it may turn faster or stall.

What are the symptoms? Is it just DOA, or does it do something, but incorrectly?
 

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