Difference From 50hz Load to 60hz Supply

If it is free of a load then it will run faster.

However, if it is connected to a load, provided the motor can handle any increase in torque due to the load, then the motor will run faster. If it can't then the motor will stall, tripping on overload if the device has been correctly selected, installed and set. Typical examples of load that could cause this to happen will be fans, centrifugal pumps, etc., where there is a strong relationship between the power absorbed and the shaft speed. Torque and motor current are intimately related.

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hi,

greetings from India.

1. To get RPM use formula speed n = (120*f )/p where f = system frequency

p = no of poles of motor

2. a 60 hz 4 pole motor will run at 1800 RPM synchronous and in practice it will run at something around 1720 - 1780 depends on internal losses.

3. a 50 hz 4 pole motor will run at 1500 and in practice 1420 - 1480

the motor will work with high speeds as like you have connected a VFD

If motor is TEFC type then you will get good results as more cooling will be provided.

you have to confirm the output speed (the application!)at final stage which is acceptable or not,as it will be increased by 1.2 times.

It is just a bit more complicated.

a) V / f has to be maintained constant for motor or as nearly as possible.

b) The 50hz load - I am not sure what is the type, at the 20% extra RPM, the rotating components (eg bearings, seals etc) might lose their life quickly.

c) The performance characteristics of the load at the extra RPM has to be ensured.

You may find this site assists you with the answer to your question:-

http://www.lmphotonics.com/index.php

Very vague question. has been discussed here many times before...

It will turn slower. Slower RPM (1500 vs.1800) means less power delivered. Consequences, for both the motor and the load, depending on the load.

Wangito.

I would have expected the actual RPM of a 50 Hz nameplate motor to spin faster on a 60 Hz supply. (Assuming of course it is not a BLDC or PMSM running off an inverter.)

For induction types of motors, it will spin faster, for universal types, assuming same voltage, it will turn at the same speed, or very close to I believe.....

The question asked in the body of your post lacks sufficient detail to allow a meaningful answer to be provided. At a minimum, additional information about the motor is needed.

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The question asked in the title of your post is easier to answer. The difference from 50Hz to 60Hz is 0.003333334/seconds....or 300Hz.

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I actually passed on responding to this question 3 separate times. In the end I could not resist.