公开(公告)号：US12126324B2

公开(公告)日：2024-10-22

申请号：US18558207

申请日：2022-05-06

Applicant: Massachusetts Institute of Technology

Inventor： David J. Perreault ,  Jessica Boles ,  Jeffrey H. Lang ,  Joseph Bonavia

IPC: H03H9/17

CPC classification number: H03H9/17

Abstract: Described are structures and techniques for providing high-efficiency, high-power-density piezoelectric resonators (PRs) for use in power converters. In some embodiments, a power converter can include a PR for energy transfer, where the PR substantially satisfies geometry conditions disclosed herein for achieving high-efficiency and high-power-density. The geometry conditions can be defined in terms of the converter's specified (e.g., rated) voltage and power level.

公开(公告)号：US20240322789A1

公开(公告)日：2024-09-26

申请号：US18558207

申请日：2022-05-06

Applicant: Massachusetts Institute of Technology

Inventor： David J. Perreault ,  Jessica Boles ,  Jeffrey H. Lang ,  Joseph Bonavia

IPC: H03H9/17

CPC classification number: H03H9/17

Abstract: Described are structures and techniques for providing high-efficiency. high-power-density piezoelectric resonators (PRs) for use in power converters. In some embodiments. a power converter can include a PR for energy transfer. where the PR substantially satisfies geometry conditions disclosed herein for achieving high-efficiency and high-power-density. The geometry conditions can be defined in terms of the converter's specified (e.g., rated) voltage and power level.

公开(公告)号：US12009746B2

公开(公告)日：2024-06-11

申请号：US17605255

申请日：2020-06-12

Applicant: Massachusetts Institute of Technology

Inventor： David J. Perreault ,  Jessica Boles ,  Joshua Piel

IPC: H02M3/155

CPC classification number: H02M3/155

Abstract: A dc-dc converter can include a plurality of switches, a piezoelectric resonator (PR) for power stage energy storage, and a means for controlling one or more switching sequences. The switches operate in accordance with the switching sequences to transfer energy from the input to the output via the PR while providing low-loss resonant soft-charging of the PR's capacitance. The switching sequences include: connected stages in which a first and second PR terminals are both connected to one of the input, the output, or the other PR terminal; and open stages in which at least one of the first or second PR terminal is not connected by a closed switch to one of the input, the output, or the other PR terminal.

公开(公告)号：US20240356438A1

公开(公告)日：2024-10-24

申请号：US18652104

申请日：2024-05-01

Applicant: Massachusetts Institute of Technology

Inventor： David J. Perreault ,  Jessica Boles ,  Joshua Piel

IPC: H02M3/155

CPC classification number: H02M3/155

Abstract: A dc-dc converter can include a plurality of switches, a piezoelectric resonator (PR) for power stage energy storage, and a means for controlling one or more switching sequences. The switches operate in accordance with the switching sequences to transfer energy from the input to the output via the PR while providing low-loss resonant soft-charging of the PR's capacitance. The switching sequences include: connected stages in which a first and second PR terminals are both connected to one of the input, the output, or the other PR terminal; and open stages in which at least one of the first or second PR terminal is not connected by a closed switch to one of the input, the output, or the other PR terminal.

公开(公告)号：US20240372470A1

公开(公告)日：2024-11-07

申请号：US18685983

申请日：2022-10-05

Applicant: Massachusetts Institute of Technology

Inventor： Jeffrey H. Lang ,  David J. Perreault ,  Jessica Boles ,  Joseph Bonavia

IPC: H02M3/158 ,  H10N30/50 ,  H10N30/87

Abstract: According to one aspect of the present disclosure, an electrical-to-electrical power converter includes an energy storage component including a transducer material and a second material for mechanical energy storage, the second material attached to the transducer material. In some embodiments, the transducer material and the second material are both configured to store mechanical energy.

公开(公告)号：US20240213883A1

公开(公告)日：2024-06-27

申请号：US18557172

申请日：2022-07-07

Applicant: Massachusetts Institute of Technology

Inventor： Jessica Boles ,  Elaine Ng ,  Jeffrey H. Lang ,  David J. Perreault

IPC: H02M3/335 ,  H02M3/00

CPC classification number: H02M3/33576 ,  H02M3/01 ,  H02M3/33573

Abstract: According to one aspect of the disclosure, a converter having a first port and a second port, the converter comprises: a piezoelectric transformer (PT) having a first port and a second port; one or more first switches configured to operate in accordance with a first switching sub-sequence to transfer energy from the first port of the converter to the first port of the PT, the first switching sub-sequence having at least six (6) stages; and one or more second switches configured to operate in accordance with a second switching sub-sequence to transfer energy from the second port of the PT to the second port of the converter.