公开(公告)号：US20250119047A1

公开(公告)日：2025-04-10

申请号：US18983205

申请日：2024-12-16

Applicant: DENSO CORPORATION

Inventor： Takafumi MATSUMOTO ,  Hiroto INOUE ,  Takuro SAHARA ,  Shinji HASHIMOTO ,  Satoshi MIYANO ,  Riku OUCHI ,  Shigeji OISHI ,  Hiroyuki KAWASHIMA ,  Tokuhisa TAKEUCHI

IPC: H02K49/10

Abstract: A power transmission device includes a magnetic gear with an input shaft magnet that receives rotational driving force, a magnetic modulator to modulate magnetic flux, a multi-pole magnet with more poles than the input shaft magnet, and an output shaft rotating with either the magnetic modulator or the multi-pole magnet. The device also features a magnetic circuit where the magnetic flux flows in parallel from the input shaft magnet. Between the input shaft magnet and the magnetic modulator is a flux-forming member with higher magnetic permeability than a vacuum, forming a short-circuiting flux path. The magnetic circuit creates two paths: a torque generation path, where magnetic flux flows through the magnetic modulator and multi-pole magnet, and a short-circuit flux path, where it bypasses the magnetic modulator. The flux-forming member's magnetic permeability is within ±20% of the value that maximizes torque.

公开(公告)号：US20250116347A1

公开(公告)日：2025-04-10

申请号：US18983052

申请日：2024-12-16

Applicant: DENSO CORPORATION

Inventor： Takafumi MATSUMOTO ,  Hiroto INOUE ,  Takuro SAHARA ,  Shinji HASHIMOTO ,  Satoshi MIYANO ,  Riku OUCHI ,  Hiroyuki KAWASHIMA ,  Shigeji OISHI

IPC: F16K31/04 ,  H02P29/40

Abstract: A motor-operated valve includes a motor, valve seat, valve body, magnetic gear, and controller. The motor generates rotational force when powered, allowing the valve body to open and close the valve port, which permits fluid passage. The magnetic gear transmits this force from the motor to the valve body. The controller regulates the electric current supplied to the motor. During fully-closed operation, the controller limits the current to less than a fully-closed current limit value, ensuring the valve port is completely closed. This limit value is higher than the adjusting current value, which is the current supplied during valve opening adjustments.

公开(公告)号：US20230344304A1

公开(公告)日：2023-10-26

申请号：US18333399

申请日：2023-06-12

Applicant: DENSO CORPORATION

Inventor： Takafumi MATSUMOTO ,  Hiroto INOUE ,  Takuro SAHARA ,  Shinji HASHIMOTO ,  Ryu FUKUSHIMA ,  Ryotaro SUZUKI ,  Riku OUCHI ,  Shinji KAWADA ,  Toshihisa NAKAJIMA ,  Seiichiro WASHINO

IPC: H02K7/10 ,  H02K49/00 ,  F04D25/02 ,  B60H1/32

CPC classification number: H02K7/10 ,  H02K49/00 ,  F04D25/026 ,  B60H1/3204 ,  B60H2001/3286

Abstract: A power transmission device includes: a pole piece configured to rotate by modulating a magnetic flux between a drive-side magnet and a stationary magnet; and a sealing member that partitions an inside of a housing into a driving side space where the drive-side magnet is disposed and a driven side space where the stationary magnet and the pole piece are disposed, so as to seal fluid between the driving side space and the driven side space. The pole piece and the stationary magnet have a cylindrical shape and are disposed coaxially with and radially outer side of the drive-side magnet. The sealing member includes: a sealing cylinder portion positioned radially outer side of the drive-side magnet; and a sealing bottom surface portion covering the sealing cylinder portion from the driving side space.