Hfl generator problem - help

[John100156]

After a run down the coat earlier in the week, I was down in the engine room today to trace-out the HFL gennie wiring, still no joy locating a wiring diagram from anybody, and HFL have not responded at all to any requests, which is most disappointing.

Capacitor is a 35uF which I shall replace, there is a 100VA 240/24 transformer (two 12vac secondary windings in parallel) which is then bridge rectified to 24VDC. Which I expect is the control circuit.

The stator/rotor windings are as yet untested, there are 9 cables plus two capacitor cables running out of the main generator casing, all marked numerically as follows:

5 = capacitor
8 = capacitor

7/60/9 = all connected together, so assume that's some form of star point
1 = 240VAC Genny Output (also feeds into primary coil of transformer Live)
6 = 240VAC Genny Output (also feeds into primary coil of transformer Neutral)
3 = copper bar linked to 4
4 = copper bar linked to 3
2 = Nothing appears to be connected to this - end of winding?
? = Nothing appears to be connected to this - end of winding?

Any generator guru's out there that can tell from above the winding configuration, I can then split them and megga them out....!

 

[superheat6k]

After a run down the coat earlier in the week, I was down in the engine room today to trace-out the HFL gennie wiring, still no joy locating a wiring diagram from anybody, and HFL have not responded at all to any requests, which is most disappointing.

Capacitor is a 35uF which I shall replace, there is a 100VA 240/24 transformer (two 12vac secondary windings in parallel) which is then bridge rectified to 24VDC. Which I expect is the control circuit.

The stator/rotor windings are as yet untested, there are 9 cables plus two capacitor cables running out of the main generator casing, all marked numerically as follows:

5 = capacitor
8 = capacitor

7/60/9 = all connected together, so assume that's some form of star point
1 = 240VAC Genny Output (also feeds into primary coil of transformer Live)
6 = 240VAC Genny Output (also feeds into primary coil of transformer Neutral)
3 = copper bar linked to 4
4 = copper bar linked to 3
2 = Nothing appears to be connected to this - end of winding?
? = Nothing appears to be connected to this - end of winding?

Any generator guru's out there that can tell from above the winding configuration, I can then split them and megga them out....!

You say two 12v taps connected in parallel - this would produce 12vac. For 24vac these need to be in series.

I suspect your internal coils are 1 and either 3 or 4 and 6 and 4 or 3.
Two x 120vac in series to produce 240vac. This allows the genny to be used in the US with the coils connected in parallel.

The Kohler generator I recently acquire has a similar set up.

To confirm the main windings disconnect the linker 3 & 4 and buzz out to 1 & 6.

Without a wiring diagram not sure what the three linked are doing.

I would disconnect all and buzz all out ideally with a megger that will read to two places of decimal when on ohms, Also check if there is an earth link from the neutral on 6 to chassis.

Then PM the answers and I will see if I can work out the connection for you.

Does the genny have brushes - if so are these clean. The Kohler I have has brushes which had bee=come contaminated and need replacing, which I haven't yet got around to doing.

 

[John100156]

Yes of course, they are in P not S hence two 12VAC windings from a 100VA tranny that connects to a bridge rectifier for the control cct.

The genie is brushless self-exiting, I have a mega on board and want to buzz the windings, would be great to get hold of a manual though, as the stator and rotor cables are all numbered, but hey-ho. Will probably just change the Cap anyway.

I suspected there would be two 120V windings as you suggest, I may just pull the unit out and strip it down at home, as it's tight working in the engine room. I feel a winter job looming.

Thanks for your input - much appreciated.

 

[John100156]

At long last and after much chasing and searching HFL-Germany came up trumps with the workshop manual for my 2001 HFL generator which excellent and provides all the information I need to trace-out, identify and rectify the fault!

It could be as simple as flashing the field core, it is a brushless self-exciting generator which uses a charged capacitor to excite the field, the capacitor can discharge which prevents the generation of magnetic flux to start the generation - it does have two 120V stator windings which I can now identify. Also gives winding resistances, etc.

Thanks to all those that have taken the time to respond and/or PM'd me in this regard - hopefully next report will be a more positive one, no pun intended......

 

[kashurst]

Be careful using the mega on the rotor as it has some diodes in it that really won´t like it. A regular multimeter should check that out OK. Good luck.

 

[John100156]

Yes - the manual is actually very informative and states that the diodes must be disconnected. I shall resistance test each winding in both directions first to get a feel for continuity, then fit a new capacitor anyway and flash it whilst connected under no-load with 12VDC for a few seconds and hope to see the output rise.... I understand the theory and hope that does the trick. Otherwise, I will pull the whole unit out and bench test at home. Long trip planned for next year so need her working well....!

 

[lexakor11]

Hello John. I'm from Russia. I am involved in boat repairs. My friend bought a Fireline 37 boat and it has an H2W6MIC diesel generator. The generator is not working. Do you have any information on such a generator? I would be very grateful for your help.