Patent ID: 8189741

Claim:
An electrical power supply for an X-ray tube, the electrical power supply comprising: a high voltage generation device (D G ) configured to transmit a high voltage to the X-ray tube, the high voltage generation device (D G comprising: a primary capacitor (C 1 ); and at least one voltage source (S) configured to supply the primary capacitor (C 1 ); an energy storage device (D S ) comprising: an auxiliary capacitor (C 2 ) configured to receive from the primary capacitor (C 1 ) a quantity of energy and to return said energy to the primary capacitor (C 1 ); and a control device (D C ) arranged between the high voltage generation device (D G ) and the energy storage device (D S ), the high voltage generation device (D G ), the energy storage device (D S ) and the control device (D C ) being connected in series, the control device (D C ) configured to connect or isolate the energy storage device (D S ) from the high voltage generation device (D G ) such that the X-ray tube is powered by a variable high voltage between a first high voltage (kV 30 ) and a second high voltage (kV 31 ).