Energy storage and transmission system

An energy storage and transmission system comprising:

• a flywheel energy storage device including
• a first electric machine including a first flywheel and a first motor, said first motor including a first stator, a first rotor that is coupled to said first flywheel, and a number (P) of first coils that are wound around said first stator, where P≥3, said first coils cooperatively forming a first star configuration that has a central terminal and a number (P) of end terminals, with each of said first coils coupled between a respective one of said end terminals of said first star configuration and said central terminal of said first star configuration;
• a driver device for driving said flywheel energy storage device, and including
• a number (P) of legs each including a first switch and a second switch which are coupled to each other, and a common node of which is coupled to a respective one of said end terminals of said first star configuration, said first switches of said legs being coupled to each other, and a common node thereof being used to be coupled to a positive terminal of a direct current (DC) power source, said second switches of said legs being coupled to each other, and a common node thereof being used to be coupled to a negative terminal of the DC power source,
• a number (P) of first diodes each coupled to said first switch of a respective one of said legs in parallel, with its anode coupled to said common node of said first and second switches of said respective one of said legs,
• a number (P) of second diodes each coupled to said second switch of a respective one of said legs in parallel, with its cathode coupled to said common node of said first and second switches of said respective one of said legs,
• at least one first capacitor each coupled between said common node of said first switches and said common node of said second switches,
• a second capacitor coupled between said common node of said first switches and said central terminal of said first star configuration, and
• a third capacitor coupled between said central terminal of said first star configuration and said common node of said second switches;
• and
• a transmission device driven by said flywheel energy storage device, and including
• a cylinder including a housing, a piston, a first connecting rod and a second connecting rod, said housing defining a first space, a second space, and a channel that is in spatial communication with the first and second spaces, said piston being disposed in the channel, and being capable of reciprocal movement in the channel, said first connecting rod being disposed in the first space and the channel, and having a first terminal that is pivotally coupled to said piston in the channel, and a second terminal that is disposed in the first space, said second connecting rod being disposed in the second space and the channel, and having a first terminal that is pivotally coupled to said piston in the channel, and a second terminal that is disposed in the second space,
• a first crankshaft including a first shaft journal that is coupled to said first rotor, and a first crank arm that extends radially from said first shaft journal, that is disposed in the first space, and that is pivotally coupled to said second terminal of said first connecting rod, and
• a second crankshaft including a second shaft journal, and a second crank arm that extends radially from said second shaft journal, that is disposed in the second space, and that is pivotally coupled to said second terminal of said second connecting rod.