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Suzuki SE1800AD Generator Issues


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  #1  
Old 04-19-2018, 03:08:46 PM
doctle odd doctle odd is offline
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Default Suzuki Se1800AD Generator Issues

I recently got a little generator a Suzuki SE1800AD. I cleaned the carburettor and fuel system and changed the oil, it started immediately. It also produces power just a little too much power. The engine is running at 3040 RPM 50 HZ and the voltage is perfectly stable at 254/255 just running a 200w bulb. I had a look under the rear cover nd there appears to be a voltage regulator plus a mini capacitor. There is no adjustment on the regulator. Does anyone know anything about these generators? Is the little capacitor a voltage booster? Could I install a modern adjustable AVR? It runs so sweet I really want to keep it but Ireland has nominally 230v and it will damage stuff. Apologies for the long question.
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Old 04-19-2018, 05:48:22 PM
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Default Re: Suzuki SE1800AD

Its not uncommon to see 130-140V AC 60Hz here on a Honda generator with no load thats for 120V AC volts we use here as household current. I would put that unit under at least 50% capacity load and see where volts and hertz are. Thats an oldie and Im sure finding parts a problem anyway. Its really not designed to run sensitive electrical stuff also.
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Old 04-19-2018, 06:54:33 PM
doctle odd doctle odd is offline
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Default Re: Suzuki SE1800AD

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Originally Posted by Motormowers View Post
Its not uncommon to see 130-140V AC 60Hz here on a Honda generator with no load thats for 120V AC volts we use here as household current. I would put that unit under at least 50% capacity load and see where volts and hertz are. Thats an oldie and Im sure finding parts a problem anyway. Its really not designed to run sensitive electrical stuff also.
Thank you for the fast reply. I guess its over 30 years old so maybe it will be difficult to get parts I'll try a bigger load tomorrow
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Old 04-19-2018, 10:29:20 PM
Fred M. Fred M. is offline
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Default Re: Suzuki SE1800AD

Voltage should be within 10 percent. Your 255 volts is just over that.

Adjust motor speed for 50 Hz under load, and see what the voltage is.

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Old 04-21-2018, 05:42:02 AM
doctle odd doctle odd is offline
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Default Re: Suzuki SE1800AD Generator Issues

Voltage stays just over 250 volts until 1200 watts is added then it drops to 235 ish. here is a photo of the regulator
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Old 04-21-2018, 02:30:36 PM
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Default Re: Suzuki SE1800AD Generator Issues

Well your RPMS are too low, they should be at 3600 no load. Thats what most of those generators run speed wise. Bring them up to spec and take readings from there. Im thinking voltage regulator. Its a common problem because lots of people shut them down without flipping off the breaker or disconnecting all loads.
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Old 04-21-2018, 02:49:25 PM
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Default Re: Suzuki SE1800AD Generator Issues

Motor, he's in Britain. 50hZ therefore 3000 revs.
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Old 04-22-2018, 01:42:25 AM
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Default Re: Suzuki SE1800AD Generator Issues

Wow I would have thought rpms would be standard and they just wound the stator and rotor different for the 50hz. I wonder how they handle the load because 3600 is peak torque
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Old 04-22-2018, 03:18:22 AM
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Exclamation Re: Suzuki SE1800AD Generator Issues

I have ordered an AVR from the UK. I love in Ireland where traditionally we used 220 vots and the UK used 240 volts. Nominally everyone in Europe uses 230 volts . The AVR has some adjustment of voltage and if it doesn't work or blows up the alternator it's not a great loss and I will have a spare small engine.
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Old 04-22-2018, 05:01:23 AM
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Default Re: Suzuki SE1800AD Generator Issues

Likely it is a harmonically excited generator, meaning your output voltage is set with the capacitor. That is if your rotor doesn't have any brushes. If you have brushes, then output voltage is set by AVR. I've never seen a circuit that has both AC capacitor and AVR, but I guess it is possible.
Look up the Wiki page for harmonic excited generator.
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