Deep Cycle Battery Charging From Alternator
Hello, May I ask for advice regarding charging deep cycle batteries from the alternator? I have read older threads, and understand opinions vary. The previous two 100Ah deep cycle AGM coach bat...
Forum Discussion
RVs and Vessels have something cars don't -- more than one starter motor.
The mission is to allow component lifespan to be the same whether inductive reactance is there or not there.
Take in consideration 12vdc electronic components in an RV. Do they have the same lifespan in an RV as they do in a house? Electronic less than AC line voltage.
I made a serious amount of money in the 1960's and 70's clamping voltage in Jeeps with Winches and Motorola 8AL charging systems. The issue was so intense, a Mallory Ignition "condenser" was part of the package. OEM would fail some days after a "jeep trip" where the engine would fail to start. The Mallory cap was a lot larger (higher voltage rated). The cure was permanent.
Getting to avalanche rectifiers
The gentleman that demonstrated max observed voltage as never reaching 30 volts. Well guess what, power avalanche rectifiers are rated 28-32 volts. And no way in hell is an automobile rotor coil as large an inductor as a five pound starter motor armature.
A DC voltage spike is full negative and positive oriented. It's a partial sine wave (think about the role of ignition points and "condenser". How the system renders the coil as a voltage amplifier)
Transient peaks above rated voltage of discrete and integrated voltage ratings wear down P/N junctions. This is not an area with definitive limits. But eliminate transients and stuff lasts longer or doesn't fail at all.
Just adding control devices to a circuit is a loser. TVs and MOVs do wear out and fail. If incorporated within an accessories circuit the circuit itself fails.
Discrete TVs clamping is the answer. If the clamping circuit fails it does not risk the circuit it is protecting.
I worked with Oropeza a lot when it came to voltage regulator protection. Sometimes it took s small capacitor to eliminate 2nd and 3rd harmonics from affecting Q1. This is where PWM changed the game. That and Q2 saturation. MOSFET time. But that has to do with heating failures not related to TV suppression.
All the science fiction authors went nuts about an artificial nuclear detonation high in the ionosphere turning the world into a stone age. I happened to jab at one of the authors about how a circuit recloser eliminates much of the energy of a million volt lightning strike.
Or how many Teslas would be present in an EMP event, and compare it to the Teslas generated by a full body MRI scan. Why did my plastic buck fifty pocket digital watch survive my 20 minute duration MRI exam? It was placed outside the GE emitter. Behind a plastic wastecan labeled NO METALS!
Too many subjects end up flooded with hogwash. My battery studies revealed scores of fraudulent nonsense. So did the pulse charging myths. What was it,three years ago, the pulse desulfation rage ran it's course,now it seems a minor advertising blurb.
But presenting an electronic device with energy far in excess of what it is rated for is a sure way to enjoy a shortened lifespan.
And I am dead serious about not conducting the starter motor touch test if you are the bearer of a pacemaker (especially a dual electrode AV pacemaker) or have other heart rhythm issues. Find a volunteer.
The mission is to allow component lifespan to be the same whether inductive reactance is there or not there.
Take in consideration 12vdc electronic components in an RV. Do they have the same lifespan in an RV as they do in a house? Electronic less than AC line voltage.
I made a serious amount of money in the 1960's and 70's clamping voltage in Jeeps with Winches and Motorola 8AL charging systems. The issue was so intense, a Mallory Ignition "condenser" was part of the package. OEM would fail some days after a "jeep trip" where the engine would fail to start. The Mallory cap was a lot larger (higher voltage rated). The cure was permanent.
Getting to avalanche rectifiers
The gentleman that demonstrated max observed voltage as never reaching 30 volts. Well guess what, power avalanche rectifiers are rated 28-32 volts. And no way in hell is an automobile rotor coil as large an inductor as a five pound starter motor armature.
A DC voltage spike is full negative and positive oriented. It's a partial sine wave (think about the role of ignition points and "condenser". How the system renders the coil as a voltage amplifier)
Transient peaks above rated voltage of discrete and integrated voltage ratings wear down P/N junctions. This is not an area with definitive limits. But eliminate transients and stuff lasts longer or doesn't fail at all.
Just adding control devices to a circuit is a loser. TVs and MOVs do wear out and fail. If incorporated within an accessories circuit the circuit itself fails.
Discrete TVs clamping is the answer. If the clamping circuit fails it does not risk the circuit it is protecting.
I worked with Oropeza a lot when it came to voltage regulator protection. Sometimes it took s small capacitor to eliminate 2nd and 3rd harmonics from affecting Q1. This is where PWM changed the game. That and Q2 saturation. MOSFET time. But that has to do with heating failures not related to TV suppression.
All the science fiction authors went nuts about an artificial nuclear detonation high in the ionosphere turning the world into a stone age. I happened to jab at one of the authors about how a circuit recloser eliminates much of the energy of a million volt lightning strike.
Or how many Teslas would be present in an EMP event, and compare it to the Teslas generated by a full body MRI scan. Why did my plastic buck fifty pocket digital watch survive my 20 minute duration MRI exam? It was placed outside the GE emitter. Behind a plastic wastecan labeled NO METALS!
Too many subjects end up flooded with hogwash. My battery studies revealed scores of fraudulent nonsense. So did the pulse charging myths. What was it,three years ago, the pulse desulfation rage ran it's course,now it seems a minor advertising blurb.
But presenting an electronic device with energy far in excess of what it is rated for is a sure way to enjoy a shortened lifespan.
And I am dead serious about not conducting the starter motor touch test if you are the bearer of a pacemaker (especially a dual electrode AV pacemaker) or have other heart rhythm issues. Find a volunteer.
