Evening, I have just got a nice Dayton 2hp industrial motor for $25 bucks. This motor has never been connected to a supply and none of the holes are punched out. I have done a little research and it turns out this motor was like $400 bucks brand new. I think I got a deal on it!
I bought this motor for the sole purpose of building a nice induction generator. So I have a few questions on the connection methods.
This is unit is a Tri Voltage motor 200-240-460 volt motor. There is 9 wire leads in the connection box.
I want to bring out the other three wires which would be wires 10,11,12. If I am not mistaken the correct order of connection for these taps would be as follows?
I have 9 leads on the stator, numbered 1-9. If I use a meter to find the circuit from lead #7 to the end of one of the wires from the star point I should be able to label it as lead #10. the next circuit from lead #8 to one of the other star point wires will be #11. the circuit from lead #9 to the last star point wire will be #12.
Now my question? I would like to get the maximum amperage possible at 120 volts only. I have been searching through the connections options drawn up here and I see two possible connection methods.
http://www.anoldman.com/power_system...enerators_work
1.) Low Delta should in theory produce 120 volts only if the prime mover is held at the correct speed which will be about 1800 RPM from a quick calculation. Induction machines having to be driven 50-75 RPM faster than they operated as a motor.
2.) Double Delta but according to the aforementioned site this particular connection method is said to be troublesome. I am not sure I follow on this? Since this is a conversion from a induction motor there is no regulator to worry about.
3.) Low Wye would be another option, but I feel I would not be able to tap the greatest potential of the winding set with this scheme.
4.) The final configuration is called a zig-zag, and is most commonly used when residential 120v/240v is needed from a 3-phase generator.
Zig-Zag would be similar to Double Delta, and would possible offer the advantage I am looking for which is to tap the greatest given potential of the coils.
I ordered a copy of "Motors As Generators for Microhydro Power" By Nigel Smith. This book is very good, but since we have a different power system in North America, I have come to the conclusion that the C-2C connection method is useless for our split phase 120-240 system.
Now I have looked at the information posted here but I am totally in the dark I am afraid. http://www.fieldlines.com/index.php?...8107.msg824177
What I am looking for is basically a step by step guide to connecting up all 12 wires once I bring out the other three wires on this 9 wire machine.
The connection methods of interest are the Low Delta. Double Delta, Zig-Zag connection methods from a 3ph 12 wire generator.
Once the winding connections are sorted, Then I would like someone to explain how to connect up the excitation capacitors since this is a induction generator conversion.
I am under the impression if the motor is connected Wye, The capacitors for excitation are connected delta?
If I connect the motor Delta, Then doesn't the capacitors have to be connected Wye?
I spent $80 bucks locally at a AC shop for 4 50uf 450V AC Run caps.
P.S. I realize all the flaws with this type of generator. This discussion is supposed to be about connections of the 3 phases. I do not want 10 post of rubbish bashing induction generators. That is useless crap to me!
Robert
I bought this motor for the sole purpose of building a nice induction generator. So I have a few questions on the connection methods.
This is unit is a Tri Voltage motor 200-240-460 volt motor. There is 9 wire leads in the connection box.
I want to bring out the other three wires which would be wires 10,11,12. If I am not mistaken the correct order of connection for these taps would be as follows?
I have 9 leads on the stator, numbered 1-9. If I use a meter to find the circuit from lead #7 to the end of one of the wires from the star point I should be able to label it as lead #10. the next circuit from lead #8 to one of the other star point wires will be #11. the circuit from lead #9 to the last star point wire will be #12.
Now my question? I would like to get the maximum amperage possible at 120 volts only. I have been searching through the connections options drawn up here and I see two possible connection methods.
http://www.anoldman.com/power_system...enerators_work
1.) Low Delta should in theory produce 120 volts only if the prime mover is held at the correct speed which will be about 1800 RPM from a quick calculation. Induction machines having to be driven 50-75 RPM faster than they operated as a motor.
2.) Double Delta but according to the aforementioned site this particular connection method is said to be troublesome. I am not sure I follow on this? Since this is a conversion from a induction motor there is no regulator to worry about.
3.) Low Wye would be another option, but I feel I would not be able to tap the greatest potential of the winding set with this scheme.
4.) The final configuration is called a zig-zag, and is most commonly used when residential 120v/240v is needed from a 3-phase generator.
Zig-Zag would be similar to Double Delta, and would possible offer the advantage I am looking for which is to tap the greatest given potential of the coils.
I ordered a copy of "Motors As Generators for Microhydro Power" By Nigel Smith. This book is very good, but since we have a different power system in North America, I have come to the conclusion that the C-2C connection method is useless for our split phase 120-240 system.
Now I have looked at the information posted here but I am totally in the dark I am afraid. http://www.fieldlines.com/index.php?...8107.msg824177
What I am looking for is basically a step by step guide to connecting up all 12 wires once I bring out the other three wires on this 9 wire machine.
The connection methods of interest are the Low Delta. Double Delta, Zig-Zag connection methods from a 3ph 12 wire generator.
Once the winding connections are sorted, Then I would like someone to explain how to connect up the excitation capacitors since this is a induction generator conversion.
I am under the impression if the motor is connected Wye, The capacitors for excitation are connected delta?
If I connect the motor Delta, Then doesn't the capacitors have to be connected Wye?
I spent $80 bucks locally at a AC shop for 4 50uf 450V AC Run caps.
P.S. I realize all the flaws with this type of generator. This discussion is supposed to be about connections of the 3 phases. I do not want 10 post of rubbish bashing induction generators. That is useless crap to me!
Robert