公开(公告)号：US20230287775A1

公开(公告)日：2023-09-14

申请号：US17654515

申请日：2022-03-11

Applicant: Caterpillar Inc.

Inventor： Andy PUBLES ,  Mark Francis GRIMES ,  Riadh BENGUEDDA ,  Yuesheng HE ,  Mark C. PAUL ,  Todd Ryan KABRICH

IPC: E21B43/26 ,  F04B49/02 ,  F04B49/06 ,  F04B49/20

CPC classification number: E21B43/2607 ,  F04B49/02 ,  F04B49/065 ,  F04B49/20 ,  F04B17/03

Abstract: A controller that is associated with a pump system causes a power ramp rate of a motor of the pump system to have an initial power ramp rate. The controller monitors, after causing the power ramp rate of the motor to have the initial power ramp rate, a frequency of a power bus. One or more power sources provide power to the pump system via the power bus. The controller causes, based on monitoring the frequency of the power bus, the power ramp rate of the motor to be modified.

公开(公告)号：US20230243348A1

公开(公告)日：2023-08-03

申请号：US17649531

申请日：2022-01-31

Applicant: Caterpillar Inc.

Inventor： Andy PUBLES ,  Mark C. PAUL ,  Mark Francis GRIMES ,  Todd Ryan KABRICH ,  Riadh BENGUEDDA

IPC: F04B49/06 ,  F04B51/00 ,  E21B43/26

CPC classification number: F04B49/06 ,  F04B51/00 ,  E21B43/2607

Abstract: In some implementations, a controller may obtain a setting for a target discharge pressure associated with a fluid pump driven by a motor that is controlled by a variable frequency drive (VFD). The target discharge pressure may be for use in a pressure test of a system that includes the fluid pump. The controller may determine a target torque for the motor that achieves the target discharge pressure. The controller may cause, via the VFD and in connection with the pressure test, adjustment to a speed of the motor to achieve the target torque for the motor.