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Messages - Adscnc

Pages: 1 [2] 3
16
Generators / Re: Lister HA and Brush RS1B generator
« on: August 24, 2021, 12:56:47 PM »
I have continuity between all of the slip rings and brushes. So metering between ring 1 and 2 gives continuity, 1 and 3 and 1 and 4. Is this right?

17
Generators / Re: Lister HA and Brush RS1B generator
« on: August 24, 2021, 12:51:19 PM »
To recap slightly. I have zero dc voltage coming from the stator.
What are the likely causes for this?

18
Generators / Re: Lister HA and Brush RS1B generator
« on: August 24, 2021, 12:47:26 PM »
Hi Bob
I had previously cleaned the  brushes but have done the brushes again this morning with 400 grit paper. It has not made any difference.

The rings I have rubbed with some 3m scotch brite.

19
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 09:01:34 PM »
hi Bob

with the engine running:

1. with the field wires connected to the rectifier, check the voltage at x and xx, and note the voltage.

4.5mv dc

2. remove the two field wires from x and xx and apply 24 volts, and then check the 3 phases to see what power output you get, and note the voltage

15.7 v ac on 3 phases

3. with the two wires removed, and with them connected to 24 volts, check the output on the two x and xx posts of the rectifier, note the voltage.

177 v dc

4. with the two wires removed from x and xx, and connected to 24volt, check the voltage on each of the input posts of the rectifier, note the voltage.

287.7 v ac across 3 phases.

Hopefully some good data there?
Al

20
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 07:28:51 PM »
Bob you are fantastic, many thanks for taking the time to help me, it is truly appreciated.
By the way I am near Birmingham in the midlands in the UK.
I will respond later this evening.
Al.

21
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 06:44:55 PM »
When I disconnect the field wires from the rectifier, x and xx, run the engine I get 0 vdc from them

22
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 06:39:26 PM »
When I disconnect the field wires from the rectifier and apply 24 Vdc  from the battery directly to the rectifier I get 15 volts across each of the 3 phases and 9 volts from the neutral. The engine is running during this test.

23
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 05:50:46 PM »
can you check the voltage on the field wires while the generator is running, check to make sure you have voltage there and let me know what it shows..???

The field wires? Is this between x and xx  and should they still be connected to the rectifier or disconnected?

24
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 05:46:51 PM »
When applying 24dc to x and xx should they still be connected to the rectifier?

25
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 05:27:46 PM »
Hi Bob
When flashing x and xx should they be disconnected from the rectifier?

26
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 05:23:47 PM »
Hi Bob

I had a small flash when the 24v dc was removed from neg leg.

With one leg removed I have 28 ohms and continuity between x and xx

No voltage adjust transformer is fitted, so fig2 is correct.

Only fuses and meters up in the control panel, so not affecting output.

27
Generators / Re: Lister HA and Brush RS1B generator
« on: August 23, 2021, 10:27:26 AM »
Hi Bob
Have tidied up the wiring and fitted bridge rectifier.
When run i only get 16.35 volts on all 3 phases at the head.
I have flashed the stator field with 24 dc. Done this twice now in accordance with manual.
Engine running at a constant 1570 rpm.
Any pointers as to where the problem may be?

28
Generators / Re: Lister HA and Brush RS1B generator
« on: August 17, 2021, 06:40:05 PM »
Hi Bob
Any thoughts on fig3 page 5, using a variable ratio transformer to adjust the voltage?
Al

29
Generators / Re: Lister HA and Brush RS1B generator
« on: August 17, 2021, 06:24:46 PM »
Thanks Bob
Will digest this and hopefully make some progress.
Iíll update the post as I progress.

Al

30
Generators / Re: Lister HA and Brush RS1B generator
« on: August 17, 2021, 04:18:21 PM »

When adding the bridge rectifier how do work out which wires from the stator are + and - ?

Al

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