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Message-ID: <003b01c8a9c5$884d06e0$6400a8c0@george>
From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2876255@logan.com>
Subject: Re: [FlyRotary] Re: the Kubota dynamo
Date: Tue, 29 Apr 2008 16:52:03 +1000
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Ed,
I am thinking on your kind offer, I would be interested to know what you 
need to recover on the items?
George (down under) lendich@optusnet.com.a

> Dear George
>         I have a  brand new  Kubota Alt. and regulator that I bought to 
> put on a gyro that never was done. Let me know if anyone interested.
> 
> Regards
> 
> Ed Klepeis
> ----- Original Message ----- 
> From: "George Lendich" <lendich@optusnet.com.au>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Monday, April 28, 2008 8:26 PM
> Subject: [FlyRotary] Re: the Kubota dynamo
>
>
>> Scott,
>> So that's what a regulator does, I though it regulated current flow to 
>> the battery, maintaining 12 to 14 volts.
>>
>> Our 'Ship Chief' must be into electronics, now let me get this straight- 
>> you must have a switching regulator, which consists of a regulator with a 
>> solid state circuit, which switches current on and off - off when the 
>> current exceeds a certain limit ( voltage?) and back on at other times.
>>
>> I will get used to this electronics stuff eventually - just tell me if I 
>> interpreted this incorrectly! At lest I will know what to ask for.
>>
>> On a similar matter I'm seriously looking at a motorbike style generator/ 
>> alternator. The one on my Suzuki would be up to the task as it put out 
>> sufficient power for an 1800 cc, fuel injected Twin cylinder - just have 
>> to work out how to attach it to the motor.
>> George ( down under)
>>
>>> SHIPCHIEF@aol.com wrote:
>>>> George (down under);
>>>> Could do that, we were just refering to how the regulator handles 
>>>> excess power with a PM alternator, that is, it can't reduce the alt 
>>>> output, it can only sink excess power to ground and let the excess heat 
>>>> go somewhere.
>>>> That's a strong motivator to size the alternator output to be no 
>>>> greater than the desired load.
>>>> Scott E
>>>>
>>> That is one method for regulation.  Take in everything and dump what 
>>> isn't necessary into ground.  The problem is that an over-rev will pump 
>>> too many electrons through the stator wires and burn them up.
>>>
>>> A more modern method is to put a solid-state switch in the circuit.  If 
>>> the generator puts too much voltage out, cut the circuit then bring it 
>>> back online when the regulator output drops.  The regulator switches 
>>> (hence the name "switching regulator") at a rate high enough that the 
>>> regulator appears to be stabilized around the set voltage.
>>>
>>> The heat sink method is good enough when the engine rpm and loads are 
>>> characterized well enough for the more sophisticated electronics to not 
>>> be needed.
>>>
>>>
>>>
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>>
>>
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>
>
>
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