Can we use the 50 Hz Electrical Motor with 60 Hz?

Use a variable speed drive, with the top speed set to 50Hz.

http://cr4.globalspec.com/thread/10625/Electronic-frequency-conversion-50Hz-to-60Hz

La velocidad sincronica esta expresada por la frecuencia y el número de polos, n=f*120/#polos. de lo anterior se tiene que cuando tu conectas un motor de 50Hz y una tensión determinada a una frecuencia de 60Hz, los parametros de velocidad y tensión se ven alterados en un 20%. Ejemplo: un motor de 50Hz, 4 polos, 380V y una velocidad de sincronismo de 1500rpm, si lo conectas en 60Hz, la red debe tener una tensión de 460V y su velocidad quedará aumentada en 20% ó 1800rpm.

Hay que tener en cuenta que la expresión arroja la velocidad de sincronismo, la velocidad a plena carga se vera afectada en eun 3 a 4% menos de la velocidad de sincronismo. Para unirlo con el ejemplo la velocidad quedará en 1.740rpm.

Guest posts in english - respond in english. Sheesh!

The losses in the motor is proportional to the square of the frequency. If you use 60Hz with the same rated voltage then the motor will not last very long. In SA we use 220V 50Hz which produces about the same amout of losses as 120V 60Hz in the USA. So you decide...

The Motor can be used at 60 HZ power supply. But the ratio of Voltage to Frequency is to be constant.Maintain this ratio for proper functioning of motor and speed is variable by changing the FZ in direct proportion.

Yes motor will be more noisy.if u use as it is.One thing will be u will have little less torque but normally lot of margin is there during motor selection.So this can be taken care.

Good quality industrial electric motors are rated 50 or 60 Hz. If your supply is 60, the motor speed (RPM) will be increased by 20%, so you need to allow for this in the drive output.

First reply I've seen that doesn't predict doom!

Yes, 50 Hz motors can be used at 60 Hz, if the voltages are compatible. A lot of European motors are some wierd (here in the US) voltage such as 375 VAC, so it wouldn't be a good idea to connect it to a 440V or 480V service: It may run good -- for a minute . . .

I have transferred equipment to Ireland from the U.S. and then more equipment, including many pieces of European manufacture, from Ireland to Tijuana, with intermediate stops in the U.S. for reconditioning. The primary thing to watch for is a speed change if it is critical. An 1800 rpm 60Hz motor runs at 1500 rpm on 50 Hz. 460 volts, 60 Hz. is equivalent to 383 volts 50 Hz. The calandar rolls shipped from the U.S. ran a little slow in Ireland, but were at propper speed in Tijuana.

I even took several 50 and 75 HP European motors with secondary windings for starting and converted them to across the line, full voltage starting. Everything worked fine.

you can use it with 60 Hz supply insted of 50 Hz you have to take care that should use with 380 v / or with VFD drive losts of motor ( machine ) having 60Hz/50Hz selection they are just changing voltage and VFD setting.

nayanelectronics@yahoo.co.in

Friend--

Within the various posts is good information. Crabtree in #1 gives you one good option, a VFD set for a 50Hz output. G.Swaninathan in #4 notes correctly that the ratio of voltage and frequency should remain constant.

Guest, writing in Spanish in #2, added a lot of detail--I don't have a good knowledge of Spanish, but can understand most of the engineering terms. I believe he said that the synchronous speed is given by the formula: speed = frequency * 120 / (number of poles), and that changing the frequency to 60Hz is a 20% increase in frequency which would require a 20% increase in voltage. For example, a 4-pole 50Hz motor at 380V would have a synchronous speed of 1500 rpm, but at 60Hz would need 460V and have a synchronous speed of 1800 rpm. Since the actual speed is typically 3-4% less than the synchronous speed, the motor in this example would run at about 1,740 rpm.

Let me add a couple cautions. First, at the 20% higher voltage, desired for the higher frequency, you have an increased risk of insulation failure in the motor windings. Second, although the shaft speed of the motor would be higher, the horsepower capacity of the motor is not increased. Many loads are centrifugal, such as fans and pumps. Speed changes for centrifugal loads change the horsepower by the cube of the speed ratio. In your case, 60/50 = 1.2, so a centrifugal load requires 1.73 times more power (in kW or Hp).

The second half of your post has had no answers. Transformers should work fine on 60Hz. Similarly for relays or similar parts. In all of these, I believe that the voltage would need to be the same at 60Hz as at 50Hz.

Take care--JMM

Having read the prior ten response, I add one caution.......extra heat will be generated.......be certain proper ventalation is not impared............