{
  "$type": "site.standard.document",
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  "description": "A differential piezoelectric actuator-system (10) includes an inductor (L) and driver-circuit (11, 12) having switches (S1-S6) for transferring energy between first and second actuators (PZT1, PZT2) and the inductor, and between a voltage-supply node (Vbatt) and the inductor. Control circuitry (21)…",
  "path": "/patents/1393912",
  "publishedAt": "2025-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J7/865",
    "ST MICROELECTRONICS SRL [IT]"
  ],
  "textContent": "A differential piezoelectric actuator-system (10) includes an inductor (L) and driver-circuit (11, 12) having switches (S1-S6) for transferring energy between first and second actuators (PZT1, PZT2) and the inductor, and between a voltage-supply node (Vbatt) and the inductor. Control circuitry (21) determines whether a next phase in which to operate the driver-circuit is a first charging-phase or a first recovery-phase. The first charging-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the voltage supply node to the inductor; and a third sub-phase to transfer energy from the inductor to the second actuator. The first recovery-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the inductor to the voltage supply node; and a third sub-phase to transfer energy from the inductor to the second actuator.",
  "title": "ENERGY RECOVERY DRIVER FOR PZT ACTUATORS"
}