Author Topic: Pulsing generator  (Read 2103 times)

Offline TheWizard

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Pulsing generator
« on: June 24, 2018, 10:04:41 AM »
Long time listener of the podcast and hoping the TSP community can help me troubleshoot an issue with a Powerland PD3G8500E.

This was a gift a few years ago. It ran well and I test it every 3 months or so. Today I ran it on natural gas and gasoline, but the power output is pulsing every 3 seconds. Below is a video of a halogen shop light plugged in directly to an onboard outlet. What could be causing this?

Offline IKN

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Re: Pulsing generator
« Reply #1 on: July 17, 2018, 12:03:18 PM »
Could be one of a few different issues. I can here your engine surging in the video instead of a constant noise that's not in sync with the light going on and off.
According to the Owners Manual I found, there's a voltmeter on the generator control panel. Does it show a constant voltage or is it fluctuating ???
Based on what I saw and heard, it could either be the Auto Voltage Regulator (AVR) or the thermal overload for the DC exciter field is tripping and resetting. If the later, it could be a bad thermal overload or a problem in the exciter windings. Might be able to tell if you have a multi-meter that measures DC amps.

Offline Carl

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Re: Pulsing generator
« Reply #2 on: July 18, 2018, 04:59:29 AM »
  I also expect variance in output when the generator is not loaded at least 10%,even the inverter/generators as most will 'pulse' at the low end of output.