What do you mean?
Makings of a generator
- Thread starter TonyM
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Exactly what I said.
Hint would be, coils need to be wound in a given sequence to operate as a generator.
BaronJ
Grumpy Old Git.
Hi Tony,
Depending upon whether the motor is three phase or single phase the diagram I posted is correct. A single phase motor will only have two ends to a winding whilst a three phase one will have the ends of the three windings common, unless there are six wires coming out in which case you will have to sort out which pairs are the start and finishes of each one.
Depending upon whether the motor is three phase or single phase the diagram I posted is correct. A single phase motor will only have two ends to a winding whilst a three phase one will have the ends of the three windings common, unless there are six wires coming out in which case you will have to sort out which pairs are the start and finishes of each one.
The Alternators in a car generator is this circuit. Which maybe a Item you could use.
Thanks Baron I understand. I am still not sure what Bluejets is getting at.
The motor came off a 240V single phase dishwasher. However it is exactly like the diagram in #18. There are three sets of three coils. The three coils in each set are connected in series. The last coil in each set are joined to each other. The first coil in each set are connected to separate terminals. I assume its three phase or single phase depending upon whether one set of coils is connected or all three. For it's original purpose I would guess that one set could be 110V and two sets 220V I have no idea which terminals were originally used. But I would have thought that is irrelevant.
When used as a generator, will the output not vary depending upon the speed. As I said in my first post actual output is not so important. On a model, it would be nice to be able to use it for charging a battery for ignition / mobile and a few diodes. I have all options open to me and it would be nice to find out the best way ( without reconnecting each individual coil) to connect the three sets of coils to give the highest output at relatively low speed of a model engine.
The motor came off a 240V single phase dishwasher. However it is exactly like the diagram in #18. There are three sets of three coils. The three coils in each set are connected in series. The last coil in each set are joined to each other. The first coil in each set are connected to separate terminals. I assume its three phase or single phase depending upon whether one set of coils is connected or all three. For it's original purpose I would guess that one set could be 110V and two sets 220V I have no idea which terminals were originally used. But I would have thought that is irrelevant.
When used as a generator, will the output not vary depending upon the speed. As I said in my first post actual output is not so important. On a model, it would be nice to be able to use it for charging a battery for ignition / mobile and a few diodes. I have all options open to me and it would be nice to find out the best way ( without reconnecting each individual coil) to connect the three sets of coils to give the highest output at relatively low speed of a model engine.
BaronJ
Grumpy Old Git.
Hi Tony,
When I first looked at the diagram on P18 I thought that it was star connected three phase, it didn't occur to me that you are right it would be 110 volts and 220 volts depending upon which wires you chose.
The highest output would be the 220 volt connection, that would also have the highest resistance. Yes the output will vary with speed of rotation.
As an aside I've just had a quick play with a washing machine pump that I've had laying around for a few years. The rotor flicks round as if it already has magnets in the rotor. I counted five definite steps. If I put an AC volt meter across the coil it jumps up to about 80 volts every time I flick it round. so you need to be aware that the voltage output might be more than you expect.
When I first looked at the diagram on P18 I thought that it was star connected three phase, it didn't occur to me that you are right it would be 110 volts and 220 volts depending upon which wires you chose.
The highest output would be the 220 volt connection, that would also have the highest resistance. Yes the output will vary with speed of rotation.
As an aside I've just had a quick play with a washing machine pump that I've had laying around for a few years. The rotor flicks round as if it already has magnets in the rotor. I counted five definite steps. If I put an AC volt meter across the coil it jumps up to about 80 volts every time I flick it round. so you need to be aware that the voltage output might be more than you expect.
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