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Why does generator run and does not produce electricity?

Generator does not produce electricity

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You need to determine if it is a Brushed or Brushless generator and follow the tests on the link below. (You will locate the brushes on the end of the alternator in a 12o'clock position if they are fitted).

http://www.generatorguru.com/help-me-fix-my-generator-repair-advice/

Then contact Generator Guru with the results and they will let you know what needs replacing. This is a free service.
http://www.generatorguru.com/help-me-fix-my-generator-repair-advice

Posted on Sep 25, 2015

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Posted on Jan 02, 2017

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  • 36 Answers

SOURCE: generator runs producing no power

Hi, remove the electric control panel & check the wiring as sometimes we have seen the wires coming off the voltage change over switches.
Also some of these units you can check the connections in the rear of the alternator & if it has brushes that they are not stuck.
Another problem we have had is the trip switches have went faulty but still switch operates ok, they need to be checked with a probe type tester for conductivety.

Posted on Nov 29, 2008

  • 2 Answers

SOURCE: electric generator not producing electricity

Check the following:
AVR
doids windings
stator windings
rotor windings
exciting windings
AND
Exiting windings could have losts its 12volt exiting load. In that case it must be exited by 12 volt external battery
Another common problem is burned off wire or loose connection

Posted on Feb 11, 2009

  • 108 Answers

SOURCE: I have an older b&s generator, and yesterday

It possibly could be the Brushes in the generator just wore out and need to be replaced. 
bigc

Posted on Jul 01, 2009

  • 909 Answers

SOURCE: Porter Cable Generator does not produce electricity

Here are a a few possibilities to look at:

1) Bad connection at the outlets themselves (loose wire) regarding neutral, hot wires.

2) Bad Excitation Capacitor. The Exc. Cap. is responsible for energizing the field wiring of the alternator. If the field is not energized, there will not be a magnetic field developed, therefore, no electrical output.

3) Open Field / Stator winding. If Field winding is open, no magnetic field will be developed. If Stator winding is open, no voltage will be induced.

4) Generator speed is too slow. If the RPMs of the engine are too slow, the output of the alternator will fail as well. Note that from normal speed, voltage output will occur but at reducing frequency until ouput ceases altogether, usually at about 47Hz. If your alternator is a 2 pole, engine speed should be 3600 rpm nominal. If alternator is a 4 pole (most aren't), engine speed would need to be about 1800 rpm nominal.

5) Generator speed too fast. If RPMs are too fast, output may fail as well. See above.

6) Excitation Fuse has blown. There is sometimes a fuse in the excitation circuit. To check this, you will likely need to pull the end housing off the alternator. Pay attention to bearings / bushings.

Posted on Nov 27, 2009

  • 342 Answers

SOURCE: Wolf 800 generator. Engine will run but very electrical power is

is the engine running at the correct speed
3000 rpm to produce 50hz
3600 rpm to produce 60hz

Posted on Apr 04, 2010

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Craftsman 5600 watt generator AVR Location? It does not appear to be inside the cover of alternator.


The most common cause of portable generators failing to produce electricity is from the loss of residual magnetism.

Generators work by moving electrical conductors through a magnetic field. Your generator does not have magnets. The magnetic field is created by taking some of the generator output voltage and converting it to DC and feeding it to a coil to make an electromagnet.

When there is a small amount of magnetism left over from the last time the generator was running, it is called residual magnetism. The little bit of magnetism is enough to produce a small amount of electricity. This small amount of electricity is needed to create an even stronger electric magnet. As the engine turns this magnet moving its electric field, through the stator windings, your generator produces even more power.

When the residual magnetism is lost, the generator will produce no power at start-up. This residual magnetism can be lost naturally from not being used or from the load on your generator being connected when the generator is shut off. It can also happen from running a generator with no load for too long.

Generators need to work and it helps maintain that residual magnetism. When they are running, a load should be connected to it. It helps create an even stronger magnetic field. Before you shut it off, turn off the switch or breaker to disconnect the load. If you shut off a generator with the load connected, it can essentially drain or demagnetize the electromagnet. Try and avoid running out of fuel.

How to fix it:

There are a few methods of restoring a generator residual magnetism

12 Volt Generator Battery Method

Locate the voltage regulator for your generator.
Unplug the two wires that connect to the generator brushes. Normally one is red and the other is black or white.
Connect the black or white to the generator ground battery terminal.
Plug in a light, turn on the generator breaker or switch and start the motor.
Connect the battery +12 volts (red cable) to the red wire on the terminals you removed for three seconds.
Remove your wires and replace the plug. The generator should now be producing power again.

Jul 27, 2018 | Electrical Supplies

1 Answer

Why don't my generator fg7000ma generate power or only half power


Why a generator won't produce electricity?
After the unit is running, the generator rotational speed reaches the rated speed, the AC exciter stator excitation circuit switch is closed, the voltage regulator is raised to the maximum direction, at this time, the generator has no output voltage or the voltage is very low. That's why a generator fails to produce electricity.

May 31, 2015 | Electrical Supplies

1 Answer

I have a PowerBack generator. It runs but does not produce electricity. How can I test it?


by plugging in a AC lamp if it lights up it is producing electricity. Suggest looking for circuit breaker on generator as possible cause of problem.

May 25, 2015 | Electrical Supplies

1 Answer

Generator was running fine and then the electrical output quit while the engine was running.


Sounds like you did overload the capacity of the generator. What has happened is that the generator was happily running away producing the electricity required for approximately an hour and then an appliance such as an air conditioner, furnace, refrigerator, water heater, or similar large amperage draw fixture decided it was time to kick on for its cycle, or perhaps two or three of them kicked on at the same time, thereby raising the amperage requirement beyond the capability of the generator. All heavy duty appliances run at a given amperage but when they kick on for a cycle they draw almost 50 percent or more amps. Generators rated at 6000 amps or less will not power an entire home or business. When using this size of generator, disable some of your electrical items in the home by unplugging or switching off, and only connect the most important items needed for emergency use. A 3500 watt generator will only run a few lights and a television, plus only one appliance. This means that you could plug in the refrigerator and run it until it has gotten cold enough, then unplug it & connect the furnace or air conditioner or water heater so that they can do there job. Eventually you will be able to rotate through each appliance in turn, and hope the power will return soon. Your generator will likely have blown a capacitor, resistor or some similar repairable item. Some good quality generators will have an overload breaker installed, that trips before doing any damage and all that is needed is to find it and reset it, in order to continue using the generator.

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1 Answer

Wolf 800 generator. Engine will run but very electrical power is


is the engine running at the correct speed
3000 rpm to produce 50hz
3600 rpm to produce 60hz

Mar 06, 2010 | Electrical Supplies

2 Answers

My generator is not producing power runs fine does not make power


Could be several problems on the gen set itself. Check to see if there is a surge protection breaker or fuse, depending on age. Make sure all connecting wires are secure and switches are not set to 240v instead of 120v if you are trying to use outlets.

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1 Answer

Generator stopped producing electricity


if the generator has been sitting for a while you might have to excite the magnets to start producing power. plug in a reversible drill and with the generator running turn the drill in the reverse direction by hand while holding the trigger in the forward position.

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1 Answer

Engine runs but won't generate any electricity


Sometimes the generator loses the magnetic field that allows it to produce power. Do a Google search on "flashing a generator field". There are many ways to do it, but I would recommend doing some reading before trying it. Your "dead" generator could produce hazardous voltage once it comes back to life.

Also, before trying any of this, make sure the circuit breakers on the generator (if equipped) are not tripped.

Good luck and be careful!

Jan 19, 2009 | Coleman 10' X 10' Sundome Tent 9160K101

3 Answers

Electric generator not producing electricity


Check the following:
AVR
doids windings
stator windings
rotor windings
exciting windings
AND
Exiting windings could have losts its 12volt exiting load. In that case it must be exited by 12 volt external battery
Another common problem is burned off wire or loose connection

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