What is difference between series and parallel

I have a unit giving for example 100-150 volts. I want to reach upto 1 kv. A step up transformer will do the work, but my feeling as a noob is that, if i step up voltage, the amps will go down, if i want amps also up, i need to attach another unit to the existing power unit.

My question as a noob is that whether i should attach another power unit in series or parallel or how ? will it benefit in my scenario target of 1kva ? how to attach in series or parallel etc ?

Kindly help this noob.

 PhysOrg.com engineering news on PhysOrg.com >> Researchers use light projector and single-pixel detectors to create 3-D images>> GPS solution provides 3-minute tsunami alerts>> Single-pixel power: Scientists make 3-D images without a camera
 Recognitions: Science Advisor For the same power, more voltage means less current. That is because Power = Voltage * current. So to keep the power the same, if the voltage goes up by 10 times then the current only needs to be 1/10th as great. If you had a source of 100 volts AC that could give 10 amps, and you drove a 1:10 stepup transformer with it, you could get 1 amp out at 1000 volts if there were no losses, and assuming the stepup transformer could handle this much power. If you put another 100 volts AC in series with the first (and in phase with it) the result would be 200 volts. If you ran this into the same transformer, the output would be 2000 volts. If you put another 100 volts AC in parallel with the first (and in phase with it), the transformer would still generate 1000 volts and with the same load, you would still take 1 amp. With a different load, you might be able to get 2 amps at 1000 volts if the transformer was capable of it.
 Recognitions: Gold Member Science Advisor You can't get anything for nothing. It all depends on what you actually want to do. A load (heater, motor, TV) will take a certain amount of current for a certain input volts. They are usually designed for a particular operating voltage - they have a certain resistance, which defines the current. A 110V, 1kW device, operating, via a transformer, from a 220V supply, will still consume 1kW (ignoring any inefficiency and assuming a perfect transformer). The supply would not be able to tell the difference between that and a regular 220V, 1kW device. I'm not sure exactly what you want. It depends what current your 1kV device needs but, as you say, you will need nearly ten times the current supplied from the 110V mains. Putting high power supplies in parallel is not to be recommended because their voltages may not be precisely in step and you could be making a smoke making machine. If you really need 10kVA then you have to buy something appropriate - unless you really know what you're doing! Good luck.

What is difference between series and parallel

my question is very simple for you. I have a homemade generator which generates 100 volts and about 8 amps. How many generators I have to make to meet my below power requirement to run a machine which require power at below requirement. Also comment if i need a step up transformer and whether to connect in series or parallel, if you have any schematic, please put it here.

110 VAC (+5% / -10%), 50-60 Hz, 15A 765W 1HP Power.

Hope this helps.

 Recognitions: Science Advisor If you could synchronise your generators so that the outputs were the same in voltage, frequency and phase, you could put two generators like that in parallel without any transformer. This would give you 16 amps at 120 volts. However as Sophi has said, putting generators in parallel is very dangerous unless you know exactly what you are doing. The problem is that one generator can feed all its power into the other one and they could destroy each other. It would be far better to buy a commercial 20 amp 120 volt generator and use that on its own.
 Hello, I am not putting in parallel, I am asking whether it should be put in series or parallel ! I am a noob yeah. and what about watts and hp, will the 2 connected together will give the watts. Please do not ask me "unless I know what I am doing" because I think I have already revealed what I am doing. I am asking for help. You have not commented on watts requirement it is over 750 watts and 1hp as specified above. will the 2 connected together will satisfy my watts and hp requirement.
 Recognitions: Gold Member Science Advisor The short answer is "no chance". Small generators will not have the possibility of synchronising together reliably. If they are not synchronised they will trip off or blow up. I don't think this is negociable. You will just need a bigger generator. The only possible way to get round this would be if you can divide your load between the generators. Sorry.
 Hello, Thank you for the prompt answer, Well let us assume one small unit (let us not mention this unit as generator for the time being) generates 100V and 8 amps. My target was to achieve a particular voltage, amps, hp as per given above by putting the units together as much as possible to achieve the target voltage, amps, roughly. Now let us put aside whether the unit is small or big. By your answer, do you mean to say by doing anything like putting the desired units together in series or parallel, it is not possible to achieve this voltage ? WE want to inflate the generators to meet the requirement, you said that you need to divide :( , could not digest it, as I want only one machine to run with above specification, how can i divide the input voltage required by that machine through my generator ? what things are essential to synchronize it. please elaborate. I am going for this because I do not have funds for new generator. So buying one readymade is definetely not even an option for me. Please specify.
 Recognitions: Science Advisor The machine you want to power needs 15 amps and your generator can only supply 8 amps, so no transformer is going to get you more current from the one generator, at the same voltage. If there were two 120 volt 8 amp generators on the same shaft, they could be put in series to give 240 volts at 8 amps which you could then step down to 120 volts at 16 amps in a step-down transformer. Putting them on the same shaft would synchronise their frequency and phase and the voltages would not have to be identical if they were in series. It would be far better to buy a commercial 20 amp 120 volt generator and use that on its own.
 Thanks vkpro, one more thing if i attach a 3rd unit (on the same shaft) and by using a step down transformer, it will reduce voltage and increase amps, now suppose the amps of generator are exceeding now if you compare it to the machinery input requirement. Will it work ?
 Recognitions: Science Advisor As long as you only draw 8 amps from the series generators, each generator will also only supply 8 amps. However, don't forget that the engine driving all this (ie making the generators turn) will have to work harder and use more fuel to maintain the same speed of rotation. Also the generators would have to be mounted on the shaft so that their outputs were synchronized, ie they produce their maximum output at the same point in the rotation.
 thanks vk6pro once again. I know and understand what you want to say. but I will take care that all the units put together will function at fullest possible extent and they really work hard, they will definetely maintain the speed of rotation is my assurance to you. they will be mounted in series as you say and perfectly synchronized, here let us assume that the units of 110v and 8 amps are performing more or less slightly fine, now as you say it should be connected in series is ok. My last question is that if the power goes above i.e if the generator gives more amps and more volts like if 16 amp is requirement and we are getting 20 amps and if 110 v is desired and we are getting 240 volts, then whether it will suit the machine which we are going to drive on this power ?
 Recognitions: Science Advisor My last question is that if the power goes above i.e if the generator gives more amps and more volts like if 16 amp is requirement and we are getting 20 amps and if 110 v is desired and we are getting 240 volts, then whether it will suit the machine which we are going to drive on this power ? You understand that the two generators would give 240 volts at up to 8 amps depending on the load. This must then be stepped down to 120 volts again to avoid damage to the 120 volt 15 amp machine, using a suitable 240 volt to 120 volt transformer.