Generator problem

Joined
Jun 7, 2012
Threads
1
Messages
13
Have an 8000 watt duropower generator (dp8000e), having problems on the electric head side. No power coming from the windings while running. I have tried flashing with drill and ext cord on battery. I have check continuity on the windings and they are good. I am out of ideas, anyone have anything else to try?
 

reynoldston

Lawn Pro
Joined
May 23, 2011
Threads
92
Messages
5,705
I have a Honda generator and it will stop generating electric. I have found if I clean the armature and carbon brushes it generates electric again. Don't know if this helps or not?
 

EngineMan

Lawn Addict
Joined
Jun 12, 2012
Threads
9
Messages
2,275
They are not the best on the market, the Company ( Dexin International) China made product of poor quality and voltage regulator's do go on them, and I don't think you will find brushes on them. if it is fitted with a CAP check it out.
If someone would come to the workshop with one, I would show them the door, sorry to say..
 
Joined
Jun 8, 2012
Threads
321
Messages
6,749
I hope you find a solution so you can use your generator if needed because the hurricane is coming!
 
Joined
Jun 7, 2012
Threads
1
Messages
13
Engineman, thanks for the reply, I do know that the voltage regulators go out often, but when checking for voltage on the windings the regulator doesn't come into play. It does have brushes but they are in good shape, the only cap is on the regulator. I know it is a garbage generator but when working properly they are decent, it just has substandard parts. Please let me know if you have ideas of what might be wrong. Also the carbon was cleaned on the brushes and armature.
 

EngineMan

Lawn Addict
Joined
Jun 12, 2012
Threads
9
Messages
2,275
How did you do the flashing tell me how you did it.
 
Joined
Jun 7, 2012
Threads
1
Messages
13
Tried doing the drill trick with running it, plugging in a drill, hold trigger and spin chuck in reverse, was set for forward spin. Went both ways for about 5 minutes with no luck. I also used extention cord cord with cutoff female end and plugged black wire to positive and white wire to negative. Pulled spark plug wire and pulled recoil 5-6 times. No luck with that either. If you have another way to try please let me know. I was just figuring that with 0 volts coming from windings that would mean its not magnetized anymore.
 

EngineMan

Lawn Addict
Joined
Jun 12, 2012
Threads
9
Messages
2,275
Tried doing the drill trick with running it, plugging in a drill, hold trigger and spin chuck in reverse, was set for forward spin. Went both ways for about 5 minutes with no luck. I also used extention cord cord with cutoff female end and plugged black wire to positive and white wire to negative. Pulled spark plug wire and pulled recoil 5-6 times. No luck with that either. If you have another way to try please let me know. I was just figuring that with 0 volts coming from windings that would mean its not magnetized anymore.

That is part of the voltage regulator job is to magnetized the windings..!

Field Flashing of Portable Generators

As an alternative to flashing a rotor winding with a battery applied to the brushes, an electric drill may be used. Follow these steps to flash the generator:

Plug the electric drill into the generator receptacle. (Cordless drills do not work) If the drill is reversible, move the direction switch to the forward position. Start the generator

While depressing the trigger on the drill, spin the drill chuck in reverse direction. use a small wooden dowel that will break easily and a batterry drill to spin the electric drill in reverse) This will excite the field and the generator will now produce electricity. If spinning the chuck one direction does not work, try spinning the chuck in the other direction as you may have the reverse switch positioned backwards.

Use caution not to get your hand or other materials caught in the chuck. As soon as the field is excited, the generator will produce power and the drill will turn on.

The reason this works is because the electric motor in the drill will act as a small generator when spun backwards. The magnets in the drill's motor induce a voltage into the motor windings, which is fed back through the trigger, cord and into the generators receptacle. From there it goes into the power winding of the stator. The voltage going through the power winding creates a magnetic field, which is intensified due to the iron core of the stator laminations. The rotor intersects this magnetic field as it is spun past the power winding, thus inducing a voltage in the rotor winding. Once current flow is present in the rotor winding the rotor has been flashed.

If flashing the field does not make the generator work, you may have additional problems, besides a lack of magnetism in the rotor. Further testing will be needed. Hopefully, this will give a simple way to field flash your generator if needed.
 
Top