cupoftea
Advanced Member level 6
Hi,
Whilst designing a simple inverter for low power camping useage, I discovered what I think may be a breakthrough in
National grid power distribution networks...
Imagine you have a grid phase where there is much harmonics distortions etc. And also where the voltage is unfortunately going up and down suddenly.
So then you put in a 1:1 50Hz transformer, and in addition to that , you add an inverter to its input, so that you literally
control the output of that transformer to be a sinusoidal current.
You basically put field sensors in the core of the transformer, and you switch the inverter transistors such that the
field in the core has a sinusoidal profile....then the output of this transformer will be a sinusoidal
current. Thus you have solved the problem of having too many harmonics in the mains supply system.
(by having lots of these super_transformers in the grid phases.)
What do you think?
I think this is sorely needed in todays world where electric car chargers are being suddenly turned on and off in their thousands at a time...and solar inverters are
suddenly shoving power onto the grid in their thousands at a time....this sudden switching ON/OFF of these devices puts hideous harmonic distortion in the mains supply system, even though the inverters are putting out sinusoidal current when in their steady state....and the car chargers are drawing sinusoidal current in their steady state....its the constant switching ON/OFF of huge numbers of these things in the mains which causes massive mains harmonic distortion....this is why my "super transformer" is needed.
Do you believe i am onto something here?
In fact, one version of this device will not suffer from mains transients because the semiconductors will not be in the mains supply system...they will be on separate coils which are wound onto the transformer, and effect the field in the transformer in that way....making its output current sinusoidal in spite of all disturbances.
What actually will end up happening is that the output current of this "super transformer" will be sinusoidal but its voltage will not be a true sinusoid during those times where it is "correcting" mains harmonic current distortions. The one problem where people go wrong is that they expect a mains transformer to give a pure sinusoidal voltage output...whereas its the current that really needs to be sinusoidal..
..so my invention will correct the mains current...making it sinusoidal, or "more sinusoidal than it was"....but the voltage may end up with some harmonics in it....but that is less of a concern....as long as the dv/dt is not too high at any given time. Basically we are sensing the flux in the core, and then pulsing extra coils on the core to add the "anti-flux" so as to cancel the mains harmonics....or rather, reduce them.....its kind of like those aeroplane noise cancellation devices...but doing it with core flux instead of sound waves. The device will simply work as a normal 1:1 mains transformer when the "harmonics correction electronics" are switched off.
Do you know of agencies that may be willing to assist with funding a prototype?
Whilst designing a simple inverter for low power camping useage, I discovered what I think may be a breakthrough in
National grid power distribution networks...
Imagine you have a grid phase where there is much harmonics distortions etc. And also where the voltage is unfortunately going up and down suddenly.
So then you put in a 1:1 50Hz transformer, and in addition to that , you add an inverter to its input, so that you literally
control the output of that transformer to be a sinusoidal current.
You basically put field sensors in the core of the transformer, and you switch the inverter transistors such that the
field in the core has a sinusoidal profile....then the output of this transformer will be a sinusoidal
current. Thus you have solved the problem of having too many harmonics in the mains supply system.
(by having lots of these super_transformers in the grid phases.)
What do you think?
I think this is sorely needed in todays world where electric car chargers are being suddenly turned on and off in their thousands at a time...and solar inverters are
suddenly shoving power onto the grid in their thousands at a time....this sudden switching ON/OFF of these devices puts hideous harmonic distortion in the mains supply system, even though the inverters are putting out sinusoidal current when in their steady state....and the car chargers are drawing sinusoidal current in their steady state....its the constant switching ON/OFF of huge numbers of these things in the mains which causes massive mains harmonic distortion....this is why my "super transformer" is needed.
Do you believe i am onto something here?
In fact, one version of this device will not suffer from mains transients because the semiconductors will not be in the mains supply system...they will be on separate coils which are wound onto the transformer, and effect the field in the transformer in that way....making its output current sinusoidal in spite of all disturbances.
What actually will end up happening is that the output current of this "super transformer" will be sinusoidal but its voltage will not be a true sinusoid during those times where it is "correcting" mains harmonic current distortions. The one problem where people go wrong is that they expect a mains transformer to give a pure sinusoidal voltage output...whereas its the current that really needs to be sinusoidal..
..so my invention will correct the mains current...making it sinusoidal, or "more sinusoidal than it was"....but the voltage may end up with some harmonics in it....but that is less of a concern....as long as the dv/dt is not too high at any given time. Basically we are sensing the flux in the core, and then pulsing extra coils on the core to add the "anti-flux" so as to cancel the mains harmonics....or rather, reduce them.....its kind of like those aeroplane noise cancellation devices...but doing it with core flux instead of sound waves. The device will simply work as a normal 1:1 mains transformer when the "harmonics correction electronics" are switched off.
Do you know of agencies that may be willing to assist with funding a prototype?
Last edited: