Well OK, we know hot nuclear fusion works, The Sun, H-bombs, etc ... so where is the tiniest evidence that cold nuclear fusion is possible. The initial nuclei are all positively charged. What possible table-top process (that doesn't violate conservation of energy) can overcome that Coulomb barrier to provide a fusion energy gain factor =>1 ( Q => 5 is needed for a real reactor)? ITER is designed to reach Q = 10, producing 500 MW of fusion power from 50 MW of injected thermal power.

Continued cold fusion experiments are fine because we just might eventually find the right mixture of Unicorn tears and Pixie dust to make it happen. True believers never give up.

Douglas R.O. Morrison, who was a physicist at CERN for 38 years, is a longtime observer of cold fusion research; he has also attended the International Cold Fusion Conferences. Here is his assessment:

They do not appreciate, however, that the likely return is about 10^40 which means that even investing one penny to earn possible billions would be a bad bet.

Hot fusion then

 

Thanks for the input.
What if the proposed circuit design i have was capable of producing - say 400 A from 24 volt ......

400 amps from a 24 volt battery is reasonable. At least for several seconds. Unfortunately any circuit that can carry that many amps will not be on a printed circuit board.
So a very good question is why change the voltage? What advantage is anticipated from using some other battery voltage? OR is the motor voltage already selected and a specific motor on hand for the project? A motor running from a DC supply must either be a brush-type with a commutator, or a multi-phase type powered from some sort of multi-phase inverter. Those motors can be more efficient but also more expensive.
So there are a few questions to answer before you can get anything better than guesses.

 

Actually there is a way to achieve the apparent goal, It was designed by a set of scholarly politicians, with no engineering or other technical folks allowed to get in the way. The solution would include an inverter circuit with an input of 10 amps from the 24 volts battery pack and it would output 480 volts three-phase at 10 amps to drive a 12 HP three phase brushless motor. Due to the very high efficiency of the power inverter no cooling system would be required. Unfortunately this system will only work in the Sovereign Kingdom of Utopia.

The really bad, terrible, and most unfortunate news is that the borders of Utopia are closed presently. And while the King is a nice enough person he has taken an extended holiday in that State of Euphoria, where the majority of the governing class live. The State of Euphoria, quite a few miles in the opposite direction from the "Realm of Rationality", and hence one is not likely to obtain the needed entry papers.

 

400 amps from a 24 volt battery is reasonable. At least for several seconds. Unfortunately any circuit that can carry that many amps will not be on a printed circuit board.
So a very good question is why change the voltage? What advantage is anticipated from using some other battery voltage? OR is the motor voltage already selected and a specific motor on hand for the project? A motor running from a DC supply must either be a brush-type with a commutator, or a multi-phase type powered from some sort of multi-phase inverter. Those motors can be more efficient but also more expensive.
So there are a few questions to answer before you can get anything better than guesses.

Hi. Many thanks for your reply.
First - my lack of knowledge - is a IC better in this case than a PCB ?
- 2 things i can say for certain is the layout i have shows beginning with 24 volt battery and finishing with 400A.
- If you want to drive a powerful motor then we need around the 400 A. So the end power of around 400A would be matched up with a motor - to be selected.
Can you tell me what part of the world you are located Mister Bill2 ?

 

Hi. Many thanks for your reply.
First - my lack of knowledge - is a IC better in this case than a PCB ?
- 2 things i can say for certain is the layout i have shows beginning with 24 volt battery and finishing with 400A.
- If you want to drive a powerful motor then we need around the 400 A. So the end power of around 400A would be matched up with a motor - to be selected.
Can you tell me what part of the world you are located Mister Bill2 ?

First, the term "IC" is an abbreviation for Integrated Circuit, and the term "PCB", in this context is short for "Printed Circuit Board", and neither of these would be able to handle currents of 400 Amps. A much different motor control interface is needed for a motor of anywhere near that power level. I suggest that investigating the drive technology used in electric vehicles is what you need to do before going any farther with your project, whatever it is.
I am located in the state of Michigan, USA.
The kingdom of Utopia is a mythical place where neither the rules of reason nor the laws of physics apply. I use it as a point of reference to suggest that just wanting something to be real and true does not make it so. You should be able to find a number of references to Utopia in literature, since it is by no means a new concept.

 

It's been asked several times - you want to turn 24 volts into What Voltage??? AC or DC???
Your end voltage needs to be capable of producing 400 amps. Therefore this begs the question - How many batteries are you going to be using to achieve the final voltage and amperage??? Please answer these three fundamental questions and we will be able to help you with clear direction.

 

It's been asked several times - you want to turn 24 volts into What Voltage??? AC or DC???
Your end voltage needs to be capable of producing 400 amps. Therefore this begs the question - How many batteries are you going to be using to achieve the final voltage and amperage??? Please answer these three fundamental questions and we will be able to help you with clear direction.

Read the response part in post #24 and you will see that the TS does not have that information, nor even understand what you are asking.
Now I wonder about how many understood my comment about Utopia.

 

I understood.

 

The root cause of all the speculation is washo's inability to effectively communicate his/her friend's requirements. His/her introductory statement, 'Hi i am totally without electronics knowledge', confirms that.

My interpretation is that there is a requirement to build a unit (already designed) that could be used to run a standard single or three phase mains-operated AC motor off a 24 V battery (an inverter!).

Regards,

Nandu.

 

- 2 things i can say for certain is the layout i have shows beginning with 24 volt battery and finishing with 400A.
- If you want to drive a powerful motor then we need around the 400 A. So the end power of around 400A would be matched up with a motor - to be selected.

Sorry, seems our members simply are trolling you.
You are absolutely right.
Use current booster.
For example, it may take 10A from 24V battery and give 400A to unipolar motor.

 

Sorry, seems our members simply are trolling you.
You are absolutely right.
Use current booster.
For example, it may take 10A from 24V battery and give 400A to unipolar motor.

There is a rather fundamental reality that you will not get more useful power out than you put in. Ten amps at 24 volts is 240 watts, almost one-third of a horsepower. That is adequate for a motorized chair but not for a passenger car.
And just how much useful advice can one expect when the requirements are not described to any real degree?
What the TS is asking for is the equivalent of what the engineers in the electric car companies have spent a year designing. So it is not a small favor being requested.

 

The root cause of all the speculation is washo's inability to effectively communicate his/her friend's requirements. His/her introductory statement, 'Hi i am totally without electronics knowledge', confirms that.

My interpretation is that there is a requirement to build a unit (already designed) that could be used to run a standard single or three phase mains-operated AC motor off a 24 V battery (an inverter!).

Regards,

Nandu.

Many thanks Nandu. You have read what i posted.
the design is not mine to " show the world". it could be that this dear friend of mine may have a design that can shed new light on the possibility worthy of consideration.
Your interpretation is absolutely correct - i am searching for a participant to work with me.

 

Many thanks Nandu. You have read what i posted.
the design is not mine to " show the world". it could be that this dear friend of mine may have a design that can shed new light on the possibility worthy of consideration.
Your interpretation is absolutely correct - i am searching for a participant to work with me.

OK, I understand about the not being able to give a lot of details. BUT an explanation of how much mechanical power needs to be delivered from a motor is not a lot of information about a concept vehicle. If the power source is already selected as 24 volts from some sized pair of batteries, then the simple solution is a 24 volt brushless DC motor with the required driver circuits. That sort of system is available from a number of companies as a complete package, and all they will need to know is how you want to mount the motor and how you want to pay for it.

 

Many thanks Nandu. You have read what i posted.
the design is not mine to " show the world". it could be that this dear friend of mine may have a design that can shed new light on the possibility worthy of consideration.
Your interpretation is absolutely correct - i am searching for a participant to work with me.

Hi washo,

Here's wishing you and your friend all success in locating the most competent person to develop the prototype.

Regards,

Nandu.