Author Topic: amplifiers on generators are they safe? (Read 4922 times)

Hammerheart · « **on:** Jul 20, 2014 at 09:24 PM »

Just worrying, safe ba gears natin if powered by a generator? Me voltage regulator naman di naman direct sa outlet. Kinakabahan lang ako. Our place was struck by typhoon glenda, baka months pa bago maibalik electricity, grabe damage kasi sa place namin.

dodie · « **Reply #1 on:** Jul 20, 2014 at 10:08 PM »

ako boss mas kampante ako pag genset gmit namin kesa sa supplier ng kuryente namin. minsan over voltage sila umaabot ng 245v. yung genset na gmit namin steady sa 220v. pero yung mga china made generator na 3kva below, minsan di maganda bumigay ng kuryente specially yung mga portable genset nila.

Hammerheart · « **Reply #2 on:** Jul 20, 2014 at 10:16 PM »

Thanks sir.
I think they'll be safe.

Honda/elemax na 2.9KVA gamit ko.

darkangel69 · « **Reply #3 on:** Jul 20, 2014 at 10:18 PM »

Sir Denton wala akong nakikitang problema sa paggamit mo ng genertator to power your amps lalo na't you've mentionted that you have a voltage regulator. As far as my understanding with regards to generators ang output electricity nila is modified sine wave unless specified that it can produce pure sine wave. Ang pure sine wave ay yung galing mismo sa mga distribution utilities like MERALCO which is by far much cleaner than those coming from generators. Since purely resistive loads naman ang paggagamitan walang dahilan para di ito gamitin for audio listening purposes. Maybe those more knowledgable people here at pdvd may elaborate on this matter further.

dodie · « **Reply #4 on:** Jul 20, 2014 at 10:37 PM »

Quote from: Denton on Jul 20, 2014 at 10:16 PM

Thanks sir.
I think they'll be safe.
Honda/elemax na 2.9KVA gamit ko.

your in good hands with honda bossing!

;Dkme sir gamit namin 45kva na denyo. lagi kse brownout dito sa amen kya parte na ng buhay ang mag maintain ng genset

Hammerheart · « **Reply #5 on:** Jul 20, 2014 at 11:44 PM »

Salamat mga kapatid. Tuloy audio session sa napakadilim na kabikolan.

banesto · « **Reply #6 on:** Jul 21, 2014 at 02:40 PM »

Quote from: Denton on Jul 20, 2014 at 09:24 PM

Just worrying, safe ba gears natin if powered by a generator? Me voltage regulator naman di naman direct sa outlet. Kinakabahan lang ako. Our place was struck by typhoon glenda, baka months pa bago maibalik electricity, grabe damage kasi sa place namin.

Sana hindi nko nagtext sau para di ka kabahan hehehe....

banesto · « **Reply #7 on:** Jul 21, 2014 at 02:44 PM »

Quote from: Denton on Jul 20, 2014 at 11:44 PM

Salamat mga kapatid. Tuloy audio session sa napakadilim na kabikolan.

No problem pala joey.....

Hammerheart · « **Reply #8 on:** Jul 24, 2014 at 12:30 AM »

Quote from: banesto on Jul 21, 2014 at 02:40 PM

Sana hindi nko nagtext sau para di ka kabahan hehehe....

Oo nga ka ernie. Ikaw ata presidente ng club alpha 907 hehe.

banesto · « **Reply #9 on:** Jul 24, 2014 at 05:05 PM »

Quote from: Denton on Jul 24, 2014 at 12:30 AM

Oo nga ka ernie. Ikaw ata presidente ng club alpha 907 hehe.

Malapit na joey hehehe.

Hammerheart · « **Reply #10 on:** Jul 24, 2014 at 10:06 PM »

Quote from: banesto on Jul 24, 2014 at 05:05 PM

Malapit na joey hehehe.

Ikaw talaga at wala ng iba. Ikaw lang ng-iisang me 3 alpha 907 hehe
Ako isa lang hehe

Stagea · « **Reply #11 on:** Jul 24, 2014 at 10:15 PM »

Quote from: darkangel69 on Jul 20, 2014 at 10:18 PM

Sir Denton wala akong nakikitang problema sa paggamit mo ng genertator to power your amps lalo na't you've mentionted that you have a voltage regulator. As far as my understanding with regards to generators ang output electricity nila is modified sine wave unless specified that it can produce pure sine wave. Ang pure sine wave ay yung galing mismo sa mga distribution utilities like MERALCO which is by far much cleaner than those coming from generators. Since purely resistive loads naman ang paggagamitan walang dahilan para di ito gamitin for audio listening purposes. Maybe those more knowledgable people here at pdvd may elaborate on this matter further.

Sine wave ang output ng conventional generators sir. Yung cheaper inverter gensets saka mga UPS lang ang merong modified square wave output (though nicer ones are sine wave as well).

darkangel69 · « **Reply #12 on:** Jul 25, 2014 at 05:56 AM »

Quote from: Stagea on Jul 24, 2014 at 10:15 PM

Sine wave ang output ng conventional generators sir. Yung cheaper inverter gensets saka mga UPS lang ang merong modified square wave output (though nicer ones are sine wave as well).

Most traditional or conventional generators do not produce "pure sine wave" AC current especially the ones made in China or the cheaper ones, I can prove that to you sir. Try feeding the output AC current to a motor and you'll see what I mean. I've had a job in a manufacturing plant before (Sanyo) where we run motors (stepper, NEMA) and the genset we used were sourced from Japan (mostly Honda's) and produces "pure sine wave" AC current so sensitive loads (motors) can run efficiently. Newer quality gensets especially the inverter types are the ones which can produce "pure sine wave" AC current. Right now I work for an electric utility company which supplies electricity to industrial customers such as feed mills and water pump stations which obviously have motors.

tony · « **Reply #13 on:** Jul 25, 2014 at 06:48 AM »

yung ingay ng generator ang issue, nakakailang makinig na may naririnig kang huni ng generators...

banesto · « **Reply #14 on:** Jul 25, 2014 at 08:31 AM »

Tiis tiis na lang hanggat wala pang power dyan hehe.

Hammerheart · « **Reply #15 on:** Jul 25, 2014 at 09:44 AM »

Quote from: tony on Jul 25, 2014 at 06:48 AM

yung ingay ng generator ang issue, nakakailang makinig na may naririnig kang huni ng generators...

Sa likod ng bahay genset master tony. Separated by 2 doors kaya di na masyado madinig ingay hehe.

Stagea · « **Reply #16 on:** Jul 25, 2014 at 10:05 AM »

Quote from: darkangel69 on Jul 25, 2014 at 05:56 AM

Most traditional or conventional generators do not produce "pure sine wave" AC current especially the ones made in China or the cheaper ones, I can prove that to you sir. Try feeding the output AC current to a motor and you'll see what I mean. I've had a job in a manufacturing plant before (Sanyo) where we run motors (stepper, NEMA) and the genset we used were sourced from Japan (mostly Honda's) and produces "pure sine wave" AC current so sensitive loads (motors) can run efficiently. Newer quality gensets especially the inverter types are the ones which can produce "pure sine wave" AC current. Right now I work for an electric utility company which supplies electricity to industrial customers such as feed mills and water pump stations which obviously have motors.

They might produce output that deviates from a clean sine wave, but I don't see them producing a "modified sine wave" like how a modified sine wave inverter would (with defined steps). The deviation is mostly from the lack of consistent spin rate for the alternator (due to lack of rotating mass, bad tolerances, poor transient compensation, etc.), and sometimes because of the characteristic of the load.

Good inverters can provide a very clean output that is very close to a perfect sine wave. Low cost inverters can provide a very dirty output (square wave or stepped square wave... aka modified sine wave).

Conventional generators use an alternator that should always output something approximating a sine wave. They do not have the capability to produce a square waveform.

Modified sinewave from a cheap inverter (not possible with a conventional alternator):

Dirty output from a low quality conventional generator:

Clean output from a high-end inverter:

Clean output from a good conventional generator:

A good inverter generator and a good conventional generator can both provide good power. A modified sine wave inverter will likely do worse than even a cheap conventional generator, as long as the conventional generator is working properly. This is the reason why a modified sine wave inverter is very rarely used on generators (since they can just make a conventional generator in this case).

markcrenz · « **Reply #17 on:** Jul 25, 2014 at 10:16 AM »

Quote from: Stagea on Jul 25, 2014 at 10:05 AM

Conventional generators use an alternator that should always output something approximating a sine wave. They do not have the capability to produce a square waveform.

Baka pwede pag square yung rotor and stator

tony · « **Reply #18 on:** Jul 25, 2014 at 10:24 AM »

Quote from: markcrenz on Jul 25, 2014 at 10:16 AM

Baka pwede pag square yung rotor and stator

weh....

darkangel69 · « **Reply #19 on:** Jul 25, 2014 at 12:16 PM »

Quote from: markcrenz on Jul 25, 2014 at 10:16 AM

Baka pwede pag square yung rotor and stator

Mahirap yata maghanap ng ganyan bro ah, hahaha

tony · « **Reply #20 on:** Jul 25, 2014 at 12:41 PM »

in reality, we all get out power from generators...there is no other way afaik....

majoe · « **Reply #21 on:** Jul 25, 2014 at 02:06 PM »

Quote from: markcrenz on Jul 25, 2014 at 10:16 AM

Baka pwede pag square yung rotor and stator

pwede

up and down ang stroke, hehe.

jeff29jeff2002 · « **Reply #22 on:** Aug 08, 2014 at 06:58 PM »

Quote from: Stagea on Jul 25, 2014 at 10:05 AM

They might produce output that deviates from a clean sine wave, but I don't see them producing a "modified sine wave" like how a modified sine wave inverter would (with defined steps). The deviation is mostly from the lack of consistent spin rate for the alternator (due to lack of rotating mass, bad tolerances, poor transient compensation, etc.), and sometimes because of the characteristic of the load.

Good inverters can provide a very clean output that is very close to a perfect sine wave. Low cost inverters can provide a very dirty output (square wave or stepped square wave... aka modified sine wave).

Conventional generators use an alternator that should always output something approximating a sine wave. They do not have the capability to produce a square waveform.

Modified sinewave from a cheap inverter (not possible with a conventional alternator):

Dirty output from a low quality conventional generator:

Clean output from a high-end inverter:

Clean output from a good conventional generator:

A good inverter generator and a good conventional generator can both provide good power. A modified sine wave inverter will likely do worse than even a cheap conventional generator, as long as the conventional generator is working properly. This is the reason why a modified sine wave inverter is very rarely used on generators (since they can just make a conventional generator in this case).

Power generators(alternators) do create sine wave. Power Inverters (from DC source) creates modified sine wave.

Back to the topic, Amplifiers and all AC loads are safe with generators as long as the voltage and frequency requirements are met.