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公开(公告)号：US20210095661A1
公开(公告)日：2021-04-01
申请号：US17022104
申请日：2020-09-16
Applicant: NIDEC TOSOK CORPORATION
Inventor： Yasuhiro SHIRAI , Koji HIGUCHI
Abstract: A control device is provided for controlling a rotation speed of an electric oil pump, including a motor and a pump mechanism connected to the motor, based on a command value input from a host device. The control device includes: a first calculator calculating a first duty value of current to be output to the motor based on a deviation between the command value and a rotation speed of the motor; a second calculator calculating a second duty value of current to be output to the motor based on a deviation between a current limit value of the motor and a current value of the motor; and a drive current determiner comparing the first duty value calculated by the first calculator and the second duty value calculated by the second calculator, and selecting the lower duty value as a duty value of current that drives the motor.
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公开(公告)号：US20190383291A1
公开(公告)日：2019-12-19
申请号：US16484970
申请日：2018-02-23
Applicant: Nidec Tosok Corporation
Inventor： Yoshiyuki KOBAYASHI , Kazuhiro HOMMA , Koji HIGUCHI , Yosuke ITO
IPC: F04C29/04
Abstract: A pump apparatus includes a motor including a shaft rotatable around a central axis, and a pump that is positioned on one side in an axial direction thereof, is driven via the shaft, and discharges an oil. The motor includes a rotor, a stator, a housing accommodating the rotor and the stator, a wall partitioning the stator and the rotor, and a motor side discharge port to discharge an oil. The pump includes a pump rotor, a pump case accommodating the pump rotor, a pump side suction port to suction an oil, and a pump side delivery port to deliver an oil to the inside of the motor. A pump apparatus includes a first flow channel to cause an oil to flow into the pump through a pump side suction port, a second flow channel to cause an oil to flow to a stator region through the pump side delivery port, and a third flow channel to cause an oil to flow into the stator.
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公开(公告)号：US20200309118A1
公开(公告)日：2020-10-01
申请号：US16822038
申请日：2020-03-18
Applicant: NIDEC TOSOK CORPORATION
Inventor： Hitoshi SAKAMOTO , Koji HIGUCHI , Kunihiro KAJITA , Tomokazu IKEDA
Abstract: Provided is an electric pump device which includes a motor having a shaft extending along a first central axis, a pump portion driven by the motor, and a housing for housing the motor and the pump portion. The housing includes: a housing body portion which has a bottomed tube shape and extends in an axial direction, a flange portion which expands radially outward from an outer peripheral surface of the housing body portion, a seal portion which has a ring shape extending in a circumferential direction and is arranged at a corner portion in which the outer peripheral surface of the housing body portion and an end surface facing one axial side of the flange portion are connected, and a projection portion extending from a bottom portion of the housing body portion toward one axial side. A second central axis of the projection portion is arranged at a position shifted in a radial direction from the first central axis. The flange portion has positioning portions on the end surface facing the one axial side of the flange portion. The positioning portions have a convex shape projected from the end surface facing the one axial side of the flange portion toward the one axial side or a hole shape recessed from the end surface toward the other axial side.
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公开(公告)号：US20220034315A1
公开(公告)日：2022-02-03
申请号：US17290305
申请日：2019-09-20
Applicant: NIDEC TOSOK CORPORATION , KYB CORPORATION
Inventor： Koji HIGUCHI , Yutaka HASHIMOTO , Yoshiyuki MAKI , Kohei KUBO
Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.
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公开(公告)号：US20210348620A1
公开(公告)日：2021-11-11
申请号：US17268926
申请日：2019-10-29
Applicant: KYB Corporation , NIDEC TOSOK CORPORATION
Inventor： Kohei KUBO , Tomoyuki FUJITA , Koichiro AKATSUKA , Yoshiyuki MAKI , Koji HIGUCHI , Yutaka HASHIMOTO
IPC: F04D29/043 , F04D13/06
Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.
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Patent Agency Ranking
公开(公告)号：US20200153368A1
公开(公告)日：2020-05-14
申请号：US16676406
申请日：2019-11-06
Applicant: NIDEC TOSOK CORPORATION
Inventor： Yoshiyuki KOBAYASHI , Kazuhiro HOMMA , Koji HIGUCHI , Yutaka HASHIMOTO
Abstract: Provided is an electric oil pump that does not degrade assembly operability and does not require a complicated configuration. The electric oil pump includes a motor portion that has a motor shaft disposed along a center axis extending in an axial direction; a pump portion that is disposed on one side of the motor portion in the axial direction, is driven by the motor portion via the motor shaft, and suctions and ejects an oil, and an inverter portion that is disposed on one side of the pump portion in the axial direction and drives the motor portion, the motor shaft penetrates through the pump portion, and the electric oil pump further includes a rotation angle sensor that is disposed at the inverter portion and detects a rotation angle of the motor shaft.
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公开(公告)号：US20200032794A1
公开(公告)日：2020-01-30
申请号：US16491256
申请日：2018-03-12
Applicant: Nidec Tosok Corporation
Inventor： Takamitsu ETO , Yoshiyuki KOBAYASHI , Koji HIGUCHI , Shigehiro KATAOKA
IPC: F04C15/06
Abstract: An oil pump device includes a motor, a pump, a pump cover, and a solenoid. The pump cover includes a discharge port, an intake opening through which oil is suctioned, a first discharge opening and a second discharge opening through which oil is discharged, a first oil passage that is a flow path between the first discharge opening and the discharge port, and a second oil passage that is a flow path between the second discharge opening and the discharge port. A solenoid valve of a solenoid is located on the second oil passage.
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公开(公告)号：US20190032656A1
公开(公告)日：2019-01-31
申请号：US16048376
申请日：2018-07-30
Applicant: NIDEC TOSOK CORPORATION
Inventor： Yoshiyuki KOBAYASHI , Koji HIGUCHI , Yutaka HASHIMOTO , Shigehiro KATAOKA
Abstract: An electric oil pump includes a motor unit having a shaft and a pump unit which is disposed on a front side of the motor unit, is driven by the shaft, and discharges oil. The motor unit includes a rotor, a stator, and a resin housing in which the rotor and the stator are housed. The pump unit includes a pump rotor provided at the shaft and a pump housing having a housing part in which the pump rotor is housed. The pump housing includes the pump body that is supported by the shaft via a sliding bearing and a pump cover that covers a front side of the pump body. A rear side of the shaft is supported by the resin housing via a rolling bearing and a front side of the shaft that protrudes from the motor unit is supported by a pump body via the sliding bearing.
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公开(公告)号：US20180274540A1
公开(公告)日：2018-09-27
申请号：US15921706
申请日：2018-03-15
Applicant: Nidec Tosok Corporation
Inventor： Shigehiro KATAOKA , Yoshiyuki KOBAYASHI , Koji HIGUCHI
CPC classification number: F04C15/0034 , F01C21/10 , F04C2/10 , F04C2/102 , F04C15/008 , F04C15/064 , F04C2240/30 , F04C2240/40 , F04C2240/803 , F04C2240/808
Abstract: An electric oil pump apparatus includes an electric oil pump including a housing main body that accommodates a motor and a pump driven by the motor, a flange portion formed on the housing main body, and a control circuit case for accommodating a control circuit, and a base plate attached to the electric oil pump. The base plate includes an annular main body fixed to the housing main body, and a sealing member located between the annular main body and the housing main body. The annular main body includes a first surface located on one side, a second surface located on the other side, a first through hole for passing the housing main body therethrough, and an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole. The first surface of the base plate is opposed to the flange portion.
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公开(公告)号：US20210207598A1
公开(公告)日：2021-07-08
申请号：US16488688
申请日：2018-03-12
Applicant: Nidec Tosok Corporation
Inventor： Takamitsu ETO , Yoshiyuki KOBAYASHI , Koji HIGUCHI , Yutaka HASHIMOTO
Abstract: The pump device includes a motor portion that includes a shaft rotating about a central axis and a pump portion that is driven by a motor portion via the shaft. The pump portion includes a pump rotor that rotates along with the shaft and a pump housing that includes an accommodation portion that accommodates the pump rotor. The pump housing includes a pump body that includes a first bearing portion that supports the shaft and a pump cover with an accommodation portion disposed between the pump cover and the pump body. The pump cover includes a flow path through which oil is discharged and suctioned, and includes a second bearing portion that rotatably supports the shaft and that communicates with the flow path. An end portion of the shaft on one side in the axial direction is disposed at the second bearing portion or inside the flow path.
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