Patent ID: 9735336
Date: 2017-08-15
CPC Classifications: H01L

Claim:
1. A method for switching an electrical load having at least one capacitive component and at least one inductive component in a bridge branch of a bridge circuit, the method comprising: charging the bridge branch to a first voltage in a forward switching phase; discharging, in a first open switching phase, energy stored in the capacitive component of the electrical load using energy from the at least one inductive component of the electrical load, wherein the discharging is effected by an internal current flow forced within the bridge branch, and wherein one terminal of the bridge branch is open during the first open switching phase such; charging the bridge branch to a second voltage in a reverse switching phase, with the second voltage being polarized inversely to the first voltage; and negative charging, in a second open switching phase, energy of the capacitive component of the electrical load using energy from the at least one inductive component of the electrical load, wherein the negative charging is effected by the internal current flow forced within the bridge branch, wherein one terminal of the bridge branch is open during the second open switching phase, and wherein the electrical load in the bridge branch has a series resonant circuit with a capacitor connected in parallel which represent an equivalent circuit of a piezo actuator, the series resonant circuit representing mechanical properties of the piezo actuator, and the capacitor representing electrical properties of the piezo actuator.