dynamo?
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GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
cheaper and simpler to make..less parts = more profit !
A 'dynamo'( to me anyway) has spinning magnets so no brushes ( same as riding lawn mowers). Overall, they're more reliable..nothing to wear out and very simple(cheap) to change power to charge batteries, etc.
A 'dynamo'( to me anyway) has spinning magnets so no brushes ( same as riding lawn mowers). Overall, they're more reliable..nothing to wear out and very simple(cheap) to change power to charge batteries, etc.
A dynamo produces direct current while an alternator produces alternating current. A dynamo has a commutator while an alternator doesn't. A dynamo is less reliable than an alternator. A dynamo based system is less efficient than an alternator based system.
85Hokie
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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
In the true sense of the word - dynamo ..... that is a DC voltage producing device, a true dynamo has a commutator that produces DC.....
What you have is a really an Alternator - though many call it a dynamo - there is no commutator inside the device - a magnet is spun around a large set of windings to produce an AC voltage. And your voltage reg handles the rest - controlling the output and converting it to DC.
as Jay say - cheap and easy to produce. These devices are almost bullet proof - the only thing that goes bad in these devices are the set of bearings ..... BTDT!
Here is the inside of a "dynamo" that the bearings decided to exit stage left!
Notice the filings and bearings and how they are "stuck" to the magnet.
EDIT - In Utopia beat me to it!!!
Last edited:
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
yuck ! I had a B&S that wouldn't turn over.... tore it apart, fearing a broken rod...nope, several of the magnets inside the flywheel had broken off !! well at least one, it took out the next one, then that took out the next one......
Easy fix, replaced flywheel.
Easy fix, replaced flywheel.
ken erickson
Well-known member
Equipment
B7100 hst, 2650 front mount snowblower, L2501 hst qa loader
And can be a challenge to remove on a B7100 HST, especially that one #$%@ nut and washer.
You can upgrade to a standard alternator, pending you find (or fab) the necessary bracketry. Here is a pic of my setup:
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GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
Kind of a 'war of words', depending on what part of the world you live in...
to me, in Canada,eh...
dynamo, is a device with a rotating magnet and a fixed coil that produces power
generator, a device with a powered field coil, brushed making DC power
alternator, a device with a powered field coil,brushes making AC power
in the 'grand scheme of things' ,dynamos are simple cheap and fewest problems. Aside from bearings( common to all) , not much can fail. electrically only one component the 'coil'.
to me, in Canada,eh...
dynamo, is a device with a rotating magnet and a fixed coil that produces power
generator, a device with a powered field coil, brushed making DC power
alternator, a device with a powered field coil,brushes making AC power
in the 'grand scheme of things' ,dynamos are simple cheap and fewest problems. Aside from bearings( common to all) , not much can fail. electrically only one component the 'coil'.
Had a dynamo on the old MF135 and, while the dynamo itself only failed once, the voltage regulator and solenoid used to pack in every 2 years or so.
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
kubota calls it a dynamo. Y'all remember when I referred to Kubota's terminology as "Jinglish"? Thats one of many examples....it's not really a dynamo, it's technically an alternator but whatever.
They rarely fail when they do it's usually bearings. The majority of the time the bearings seize and the magnet/pulley assembly just stops turning and burns the belt up. Sometimes the owner recognizes the stench and sometimes they keep going and burn the belt OFF, then it overheats and destroys the engine in some cases. Most of the time it just seizes or loses power and then they shut it down. By then the engine has been so hot that the head is cracked and gasket blown. Very common.
those dynamo's typically run for thousands of hours with no problems. A lot of times I'll get customers that bring aged equipment in for FULL servicing (including valves) and I'll pull the fan belt off and spin the dynamo, if there is ANY bearing noise, replace the bearings or the dynamo whichever is cheaper. Usually bearings. As long as they ain't seized/destroyed the bearings come out pretty easy but once they are gone the outer race is all that is left and it can be a bear to get out of the housing it's resting in.
I too hated the B7100's......glad I don't work on them anymore!!
They rarely fail when they do it's usually bearings. The majority of the time the bearings seize and the magnet/pulley assembly just stops turning and burns the belt up. Sometimes the owner recognizes the stench and sometimes they keep going and burn the belt OFF, then it overheats and destroys the engine in some cases. Most of the time it just seizes or loses power and then they shut it down. By then the engine has been so hot that the head is cracked and gasket blown. Very common.
those dynamo's typically run for thousands of hours with no problems. A lot of times I'll get customers that bring aged equipment in for FULL servicing (including valves) and I'll pull the fan belt off and spin the dynamo, if there is ANY bearing noise, replace the bearings or the dynamo whichever is cheaper. Usually bearings. As long as they ain't seized/destroyed the bearings come out pretty easy but once they are gone the outer race is all that is left and it can be a bear to get out of the housing it's resting in.
I too hated the B7100's......glad I don't work on them anymore!!
torch
Well-known member
Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
The original definition of 'dynamo' did not specify AC or DC. It simply meant a means of converting mechanical energy to electrical energy. Same with 'generator'. 'Dynamo' has come to mean a DC generator in general use, but the Japanese were not wrong in applying the term to the brushless alternator.
Similarly, in the automotive world, 'generator' has come to refer to a DC device. However walk into a Home Depot and ask for a generator and you will be directed to a wall of AC producing equipment. (Some of which may actually produce high-frequency AC, then convert that to DC, then invert that into 60hz AC at the outlet. )
'Alternator' is the only term that definitively specifies AC vs DC.
Similarly, in the automotive world, 'generator' has come to refer to a DC device. However walk into a Home Depot and ask for a generator and you will be directed to a wall of AC producing equipment. (Some of which may actually produce high-frequency AC, then convert that to DC, then invert that into 60hz AC at the outlet. )
'Alternator' is the only term that definitively specifies AC vs DC.
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
even more cornfusing, is that 'car alternators' actually have the diodes ( used to convert AC into DC) built INSIDE,so as a 'black box'.. it converts rotary motion into 3 phase DC......
When the alt. in my L175 died I replaced it with what some people call a hotrod alt.
They are small, come with a pulley and are one wire.
Mine puts out 14.7 volts at idle.
Something like this is what I'm talking about.
They are small, come with a pulley and are one wire.
Mine puts out 14.7 volts at idle.
Something like this is what I'm talking about.
Amazon.com: DB Electrical AND0525 Alternator Compatible With/Replacement For Toyota 5FD-10 1986-1989, 5FD-14 1986-1989, 5FD-15 1986-1989, 5FD-18 1986-1989, 5FD-20 1986-1989, 5FD-23 1986-1989 28162, 12180SEN: Automotive
Buy DB Electrical AND0525 Alternator Compatible With/Replacement For Toyota 5FD-10 1986-1989, 5FD-14 1986-1989, 5FD-15 1986-1989, 5FD-18 1986-1989, 5FD-20 1986-1989, 5FD-23 1986-1989 28162, 12180SEN: Alternators - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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3 phase DC? LOL
While it does not really make any difference in practical terms, the diodes do rectify the AC to DC, which has a ripple on it that relates back to the frequency being rectified. This frequency will vary according to engine RPM. But the output is DC none the less.
What 40 Amp Alternator kit is used for the B2320. I found 2 on Colemans - B7311 and B7324 They look the same
Which one is the spec for the B 2320
Thanks
Glenn]
Which one is the spec for the B 2320
Thanks
Glenn]