Energy storage and flow control by means of a 2-port, time-variable coupling network

A new approach to power-flow control between a linear energy-storage device and an arbitrary load is described. Control is achieved by changing the parameters of a lossless time-variable 2-port coupling network. The load can be operated at any required (time-variable) operating point. This type of lossless energy transfer is also applicable in cases in which a charged capacitor is coupled to a noncharged capacitor; the conventional method, on the other hand, involves energy loss when two capacitors charged to different voltages are directly connected.