ELECTRICALLY-DRIVEN PUMP DEVICE, AND METHOD FOR CONTROLLING SAME

WIPO Patent Application WO/2023/286557

A1

Provided are: an electrically-driven pump device that is configured to output the actual rotation speed of a motor with respect to a received instructed rotation speed, and is capable of determining a disparity between the instructed rotation speed and the actual rotation speed, and restricting the output of the motor to an appropriate value; and a method for controlling the electrically-driven pump device. An electrically-driven oil pump device (100) comprises: a pump (10) that circulates oil; a motor (20) that drives a pump (10); a control unit (30) that drives the motor (20) on the basis of a received instructed rotation speed; a current detector (40) that detects a motor current flowing through the motor (20); and a rotation sensor (50) that detects the rotation speed of the motor (20). When the current detector (40) has detected a motor current that is higher than or equal to a set value that has been set in advance, on the basis of the relationship between the motor current and the pressure of the oil (oil pressure), the control unit (30) outputs a response rotation speed corresponding to the instructed rotation speed instead of the actual rotation speed detected by the rotation sensor (50).

KITAYAMA NAOTSUGU (JP)
AOSHIMA KAZUHIRO (JP)

PCT/JP2022/025051

January 19, 2023

June 23, 2022

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NTN TOYO BEARING CO LTD (JP)

F04B49/06; F04C15/00

JP2013194654A	2013-09-30
JP2020033871A	2020-03-05
JP2018076847A	2018-05-17
JP2008101531A	2008-05-01

FUKAMI PATENT OFFICE, P.C. (JP)

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