Running a 140W Single-Phase 60Hz Motor on 50Hz Power or 50Hz Motor on 60Hz Network

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#31 7451293 29 Dec 2009 09:50

marchello marchello

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Post #31
7451293 29 Dec 2009 09:50

And will it work when connected in a star? Because with this configuration, it starts up and only heats up a little. This 15A current applies to one phase or something. If the current in the star is not above the permissible limit, it probably shouldn`t burn out
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#32 7451525 29 Dec 2009 10:47

czesiu czesiu

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Post #32
7451525 29 Dec 2009 10:47

It should work, but the current should not be higher than 8.6A. Set the thermal limiter to this value and do not overload the engine.
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#33 7451554 29 Dec 2009 10:53

zbychu80 zbychu80

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Post #33
7451554 29 Dec 2009 10:53

marchello wrote:
And will it work when connected in a star? Because with this configuration, it starts and only heats up a little. This 15A current applies to one phase or something. If the current in the star is not above the permissible limit, it probably shouldn`t burn out

15A applies to the connection in Δ.
In a star, due to the higher voltage (400V instead of 220V), the current will naturally be lower, probably the same as Czesiu writes.
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#34 7453451 29 Dec 2009 17:28

marchello marchello

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Post #34
7453451 29 Dec 2009 17:28

zbychu80 wrote:

15A applies to the connection in Δ.

but this is the current of one phase or "total"
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#35 7454024 29 Dec 2009 18:56

zbychu80 zbychu80

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Post #35
7454024 29 Dec 2009 18:56

15A to the current of one phase when the windings are connected in Δ, voltage 220V and shaft load of 4kW.
#36 7581092 23 Jan 2010 21:59

marchello marchello

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Post #36
7581092 23 Jan 2010 21:59

The motor was sent for rewinding, after rewinding it works properly with a delta connection. I have not checked the star connection.
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Topic summary

Connecting a 60Hz motor to a 50Hz network results in a reduction of revolutions per minute (RPM), typically by 1/6, without immediate damage to the motor. However, the motor may experience increased heating. Conversely, a 50Hz motor connected to a 60Hz network may operate at higher speeds, potentially leading to mechanical stress. The construction differences between 50Hz and 60Hz motors often relate to the number of turns in the windings and the design of the centrifugal switch. Users noted that while many motors can tolerate frequency changes, specific configurations, such as capacitor induction motors, may require adjustments to prevent overheating and ensure proper operation. The discussion highlighted the importance of matching supply voltages and understanding the implications of frequency changes on motor performance.
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