The LC resonant tank includes a coarse tuning capacitor bank and a fine tuning capacitor bank.

The coarse tuning capacitor bank contains a plurality of digitally controlled coarse tuning capacitor elements, each providing a first capacitance value when active.

The fine tuning capacitor bank contains a plurality of digitally controlled fine tuning capacitor elements, each providing a second capacitance value when active.

A switched capacitor bank operable in multiple switching combinations in an alternating current power supply is described.

The capacity of the capacitor bank required for multiple phase motors operating from a DC power source is therefore decreased.

A heat sink being used for interconnecting several condensers to form a condenser bank can be produced in a particularly flexible manner by means of the inventive arrangement of heat sink modules.

Some of the capacitors or part of the bank of capacitors are/is charged and discharged simultaneously.

The present invention allows the use of electrical energy via capacitors or a bank of capacitors.

Division of the electrical pulses during charging, alternating amongst the capacitors or some of the capacitors of the bank of capacitors, optimizes the use of electrical energy.

Electrical charging takes place in the capacitors or bank of capacitors disconnected from the electrical-energy-consumption source.

Discharge of accumulated electrical energy is triggered when some of the capacitors or part of the bank of capacitors are/is disconnected from the electrical-energy-generating source.