Symmetrical universal AC-AC power conditioner

An electrical power conditioning apparatus for receiving an unregulated input AC voltage and providing a regulated AC output voltage, said apparatus comprising:

• input terminal means for connecting said apparatus to two power carrying conductors;
• input voltage divider means connected in series between said power carrying conductors for dividing the voltage across said two power carrying conductors and providing a divided voltage, said input voltage divider means being formed of two equal impedances having a common connection point;
• voltage converter means having an input coupled to said input terminal means for receiving and converting the voltage across said two power carrying conductors to a regulated DC voltage across electrical charge storage means connected to the output of said voltage converter means, said DC voltage having a value larger than the peak voltage across said two power carrying conductors, said electrical charge storage means being formed of two electrically equal and serially connected storage elements having a common connection point;
• voltage inverter means having an input coupled to said electrical charge storage means for receiving and inverting said DC voltage to a regulated AC output voltage at an output of said voltage inverter means;
• output voltage divider means connected in series across said output of said voltage inverter means for dividing said regulated AC output voltage, said output voltage divider means being formed of two equal impedances and having a common connection point;
• output terminal means coupled to said output of said voltage inverter means for providing said regulated AC output voltage to a load;
• and
• connection means for connecting together said common connection point of said input voltage divider means, said electrical charge storage means and said output voltage divider means wherein this connection means can be connected to a third power carrying conductor identified as a neutral conductor on input means and output means if this conductor is provided from said electrical service.