Patent ID: 9680082
Date: 2017-06-13
CPC Classifications: F02D,H01L,H02H,H02N

Claim:
1. A device for charging and discharging a capacitive actuator, the device comprising: an output connection to be connected to the capacitive actuator; an input connection; a reference potential connection; a first capacitor disposed between said input connection and said reference potential connection; a first series connection containing a first power switching element, a second power switching element and a center tap, said first series connection connected in parallel with said first capacitor; a third power switching element; a fourth power switching element; a first coil having a first connection connected to said center tap of said first series connection and a second connection coupled to said reference potential connection via said third power switching element and to said output connection via said fourth power switching element; said first through fourth power switching elements having diodes connected in parallel therewith such that said diodes are reverse-biased from said input connection or said output connection to said reference potential connection; a forward-biased overvoltage protection diode; and said fourth power switching element having a connection, which is not connected to said first coil, connected to said input connection via said forward-biased overvoltage protection diode.