Talk:Permanent magnet synchronous generator
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[edit]I added some discussion on rotor and stator roles. In addition I thought it was important to discuss how to achieve synchronization between the rotor rotation rate and stator induced voltage frequency. I included that three-phase generators allow for a steady synchronous response of the three-phase winding magnetic field.
In addition, the previous explanation of the conversion between number of magnetic poles in the rotor and rpm to frequency was short and I believe had errors. Previously, it was implicitly stated that frequency of induced voltage in the "rotor" is proportional to the rotations per minute of the "rotor." The former should have been "stator." Also, previously it was stated that induced voltage frequency is directly proportional to the number of permanent magnet stator poles. While this is correct, ephasis should be more on the proportionality between the frequency and rotational speed since number of poles is relatively constant until there is actual change in the generator structure. Therefore, I found the proportionality constant given should be "P/120" rather than "RPM/120."
- phillipkcho on Wednesday 11/27/2013
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[edit]"Wind turbines of any significant scale use asynchronous generators exclusively" - is this still the case? PMG's are increasingly used in large wind turbines - surely these are synchronous? (and the control electronics just live with the variable rotor speed?) Gilgamesh4 (talk) 11:45, 15 August 2016 (UTC)
(Looks like this has been edited now to include wind turbines) Gilgamesh4 (talk) 15:37, 19 August 2016 (UTC)
- My understanding is that Wind generators generally use permanent magnet asynchronous generators together with electronic inverters to deliver the correct frequency AC with high power factor.Lkingscott (talk) 17:21, 9 December 2024 (UTC)
Permanent magnet asynchronous generators
[edit]With the rise of rare earth magnets, increasing numbers of permanent magnet generators are being made and they are increasingly rarely synchronous, using electronics to convert whatever they output to whatever power is needed, AC or DC.
There is no Wiki article on Permanent magnet asynchronous generators. Would this article not be better to be renamed 'Permanent magnet generators' and give information on the different types?Lkingscott (talk) 17:21, 9 December 2024 (UTC)