Newbie question, please...

[Dan Beck]

Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor? No, I am not in college any
more *sniff, 25 years past that*, looking for homework assistance

Thank you in advance for any and all responses!
Dan

 

[Tom Biasi]

"Dan Beck" <biscuitbecks@*NOSPAM*cableone.net> wrote in message
news:i07ldg$5n0$1@news.eternal-september.org...

Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the
frequency of the AC from 50 Hz to 60 Hz, what would be the resulting
performance change (if any) of the above theoretical motor? No, I am not
in college any more *sniff, 25 years past that*, looking for homework
assistance

Thank you in advance for any and all responses!
Dan



It depends on what kind of motor it is.

 

[Jamie]

Dan Beck wrote:

Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor? No, I am not in college any
more *sniff, 25 years past that*, looking for homework assistance

Thank you in advance for any and all responses!
Dan



it you increase operating frequency, it'll spin faster..

 

[Michael A. Terrell]

Jamie wrote:

Dan Beck wrote:
Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor? No, I am not in college any
more *sniff, 25 years past that*, looking for homework assistance

Thank you in advance for any and all responses!
Dan



it you increase operating frequency, it'll spin faster..

You need to adjust the voltage. Look at the data on VFD drives for
ideas.


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

 

[John Larkin]

On Sun, 27 Jun 2010 06:58:06 -0700, "Dan Beck"
<biscuitbecks@*NOSPAM*cableone.net> wrote:

Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor? No, I am not in college any
more *sniff, 25 years past that*, looking for homework assistance

Thank you in advance for any and all responses!
Dan

An induction or shaded-pole motor's speed will be pretty much
proportional to frequency. 60 Hz motors might be a little weaker and
run a bit warmer on 50 Hz.

A synchronous motor's speed will be exactly proportional to frequency.

Brush-type motors won't care much about the frequency.

John

 

[Jasen Betts]

On 2010-06-27, Dan Beck <biscuitbecks@*NOSPAM*cableone.net> wrote:

Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor?

Depends on the motor design. Univversal, induction, or synchronous ?


--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

[Cydrome Leader]

Jasen Betts <jasen@xnet.co.nz> wrote:

On 2010-06-27, Dan Beck <biscuitbecks@*NOSPAM*cableone.net> wrote:
Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when supplied
with a 110 VAC, 60 Hz electricity source. If you could change the frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor?

Depends on the motor design. Univversal, induction, or synchronous ?


--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

At 100RPM, it's probably not a universal motor.

 

[Tom Biasi]

"Cydrome Leader" <presence@MUNGEpanix.com> wrote in message
news:i0dedl$1jk$1@reader1.panix.com...

Jasen Betts <jasen@xnet.co.nz> wrote:
On 2010-06-27, Dan Beck <biscuitbecks@*NOSPAM*cableone.net> wrote:
Hello all,

a related issue came up in the pinball newsgroup I read regularly...

Suppose you have an AC electric motor that spins at 100 rpm when
supplied
with a 110 VAC, 60 Hz electricity source. If you could change the
frequency
of the AC from 50 Hz to 60 Hz, what would be the resulting performance
change (if any) of the above theoretical motor?

Depends on the motor design. Univversal, induction, or synchronous ?


--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

At 100RPM, it's probably not a universal motor.
In real life it would most likely have a gear box.

Since the OP "imagined" the motor it was assumed he was concerned about the
frequency.

Tom