公开(公告)号：US20200080551A1

公开(公告)日：2020-03-12

申请号：US16565002

申请日：2019-09-09

Applicant: ARTEMIS INTELLIGENT POWER LIMITED

Inventor： Niall James CALDWELL ,  Matthew GREEN ,  Jill MACPHERSON

IPC: F04B49/22 ,  E02F9/22

Abstract: A prime mover and a plurality of hydraulic actuators, a hydraulic machine having a rotatable shaft in driven engagement with the prime mover and comprising working chambers, a hydraulic circuit between working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure and high-pressure valves regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine being configured to actively control the low-pressure valves of the working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the working chambers, responsive to a demand signal, wherein the apparatus further comprises a controller configured to calculate the demand signal in response to a measured property of the hydraulic circuit or actuators.

公开(公告)号：US20230118844A1

公开(公告)日：2023-04-20

申请号：US17911110

申请日：2021-03-09

Applicant: ARTEMIS INTELLIGENT POWER LIMITED

Inventor： Niall James CALDWELL ,  Daniil DUMNOV ,  Matthew GREEN ,  Stephen LAIRD ,  Jill MACPHERSON

IPC: F04B1/06 ,  F04B49/035 ,  F04B49/06 ,  F04B49/24

Abstract: A hydraulic apparatus including an electronically commutated machine having a plurality of working chambers which are controlled on each cycle of working chamber volume to carry out active or inactive cycles of working chamber volume allows only a plurality of defined fractions of cycles to be active cycles to avoid generating frequencies of active cycles which cause low frequency resonances. The demand signal may be quantised into fractions m/n where n is an integer below a threshold selected to avoid repeating patterns of active cycles of more than a cut-off length.

公开(公告)号：US20220356678A1

公开(公告)日：2022-11-10

申请号：US17864379

申请日：2022-07-13

Applicant: ARTEMIS INTELLIGENT POWER LIMITED

Inventor： Niall James CALDWELL ,  Jill MACPHERSON ,  Matthew GREEN

IPC: E02F9/22 ,  F15B11/16 ,  F15B11/17 ,  F04B7/00

Abstract: A prime mover and hydraulic actuators, a hydraulic machine having a rotatable shaft engaged with the prime mover and having a plurality of working chambers, a hydraulic circuit extending between a group of working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine having a low-pressure and a high-pressure valve regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine controlling the low-pressure valves of the group of working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the group of working chambers, responsive to a demand signal, the apparatus further having a controller calculating the demand signal responsive to a measured property of the hydraulic circuit or an actuator.