公开(公告)号：US20240178689A1

公开(公告)日：2024-05-30

申请号：US18525666

申请日：2023-11-30

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Mahesh M. Swamy

IPC: H02J7/00 ,  H02J7/02 ,  H02J7/34 ,  H02M7/797 ,  H02M7/81

CPC classification number: H02J7/0063 ,  H02J7/0013 ,  H02J7/0042 ,  H02J7/02 ,  H02J7/34 ,  H02M7/797 ,  H02M7/81

Abstract: A power supply includes a first inverter and a second inverter. The second inverter is connected in series with the first inverter in an open delta configuration. The first inverter is configured to be powered by a first battery and to output a first power signal having a first phase angle. The second inverter is in electrical communication with the first inverter and configured to be powered by a second battery and to output a second power signal having a second phase angle. The power supply also includes a controller configured to control a phase difference between the first phase angle and the second phase angle to control a magnitude of a combined output voltage of the first inverter and the second inverter.

公开(公告)号：US20220200303A1

公开(公告)日：2022-06-23

申请号：US17554315

申请日：2021-12-17

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Mahesh M. Swamy ,  Omid H. Shirazi ,  Matthew R. Polakowski ,  Nathan J. Gustafson ,  Chien-Chih Chao ,  Samantha L. Billetdeaux ,  Michael R. Halverson ,  Benjamin C. Tesch ,  Chun Jian Tang ,  Michael A. Matthews ,  James Dykstra ,  Brian M. Hockers ,  Catherine Kelli Semon ,  Andrew S. Lentz

IPC: H02J7/00

Abstract: A portable power supply including an internal power source, an AC output, a DC output, and an input unit configured to receive power from a first external source. The portable power supply further includes a first power conversion unit configured to convert the power received from the first external source to a first DC power used for charging the internal power source, an AC power conversion unit configured to convert power output by the internal power source to an AC power used for powering a first peripheral device connected to the AC output, and a DC power conversion unit configured to convert power output by the internal power source to a second DC power used for powering a second peripheral device connected to the DC output.

公开(公告)号：US20240178763A1

公开(公告)日：2024-05-30

申请号：US18525677

申请日：2023-11-30

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Mahesh M. Swamy

IPC: H02M7/217 ,  H02M3/155

CPC classification number: H02M7/217 ,  H02M3/155

Abstract: A portable power supply may include an internal power source and a active front-end converter connected to the internal power source. The active front-end converter includes a positive DC connector lead, a negative DC connector lead, a positive source side lead, a negative source side lead, and a plurality of switches. The active front-end converter is configured to operate as a DC-DC converter for DC input signals and an AC-DC inverter for AC input signals. The portable power supply also includes an AC source input, and a DC source input.

公开(公告)号：US20240405592A1

公开(公告)日：2024-12-05

申请号：US18700429

申请日：2022-10-21

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Mahesh M. Swamy

IPC: H02J7/06 ,  H02J7/00 ,  H02M1/42 ,  H02M3/00 ,  H02M3/335

Abstract: Battery pack chargers for charging a battery pack include one or more battery pack receiving portions, a power control module, and a power conversion unit. The one or more battery pack receiving portions receive and interface with the battery pack. The battery pack includes one or more battery cells. The power control module provides power to the one or more battery pack receiving portions using pulse amplitude modulation (PAM). The power conversion unit converts the power received from the first external source to a first DC power used for charging the one or more battery cells.

公开(公告)号：US20230395880A1

公开(公告)日：2023-12-07

申请号：US18326579

申请日：2023-05-31

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Mahesh M. Swamy

IPC: H01M10/42 ,  H02M1/00 ,  H02M7/5387 ,  H02J7/06

CPC classification number: H01M10/4257 ,  H02M1/007 ,  H02M7/53873 ,  H02J7/06

Abstract: A power supply that includes a rectifier, a converter connected to the rectifier, a plurality of battery management system controllers, and a plurality of inverters. The plurality of battery management system controllers are connected to the converter and configured to connect to a plurality of battery packs. Each battery pack is configured to be connected to a dedicated battery management system controller. The plurality of inverters are configured to connect to the plurality of battery packs. Each inverter is configured to connect to one of the plurality of battery packs. A first inverter and a last inverter provide terminals configured to connect to a load. The cascade converter employs a charger that has a high frequency (“hf”) isolation transformer with multiple secondary windings with identical number of turns to cater to the charging requirements of multiple battery packs.