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公开(公告)号：US20240305214A1
公开(公告)日：2024-09-12
申请号：US18594094
申请日：2024-03-04
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Kazuhiro SHIRAISHI , Keiji YASHIRO , Yuzuki ANDO
Abstract: A discharge device includes a capacitor, first and second discharge circuits each connected in parallel to the capacitor, and a comparator. The first discharge circuit includes a first discharge resistor. The second discharge circuit includes: a second discharge resistor smaller in resistance value than the first discharge resistor; and a switch connected in series to the second discharge resistor. The comparator turns off the switch when a voltage (VH) between power lines is equal to or higher than a prescribed voltage, and turns on the switch when the voltage becomes lower than the prescribed voltage. The comparator is configured to turn off the switch after an elapse of a prescribed time period since turning on of the switch.
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公开(公告)号：US12021429B2
公开(公告)日：2024-06-25
申请号：US17619078
申请日：2020-06-10
Applicant: FUJITSU GENERAL LIMITED
Inventor： Tomoki Nishio , Takashi Suzuki
IPC: H02K3/52 , F25B31/02 , H02K15/095 , H02K21/16
CPC classification number: H02K3/522 , F25B31/02 , H02K15/095 , H02K21/16 , H02K2203/12
Abstract: In insulators of a motor, in an external wall portion, the outer diameter sides of winding drum portions represent winding-drum-portion-side external wall portions, and the outer diameter sides of the opening portions represent opening-portion-side external wall portions; and the winding-drum-portion-side external wall portions have such a thickness in a radial direction that, in the axial direction of a stator, the leading end sides far from the stator are smaller than the base end sides close to the stator, and the thickness of the base end sides of the winding-drum-portion-side external wall portions is greater than the thickness of the opening-portion-side external wall portions.
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公开(公告)号：US11962191B2
公开(公告)日：2024-04-16
申请号：US17613779
申请日：2019-06-26
Applicant: Mitsubishi Electric Corporation
Inventor： Tomoki Masuko , Atsushi Matsuoka
CPC classification number: H02K1/2766 , F25B31/02 , H02K21/14 , F24F5/00 , H02K2213/03
Abstract: A rotor includes a rotor core, a first permanent magnet that is W1 mm long in a longitudinal direction, and a second permanent magnet that is W1 mm long in a longitudinal direction. The rotor core includes a first magnet insertion hole, a second magnet insertion hole, and a center lib. The first magnet insertion hole includes a first outside opening part having a radius of curvature of R1 mm, and a first inside opening part having a radius of curvature of R2 mm. The second magnet insertion hole includes a second outside opening part having a radius of curvature of R1 mm, and a second inside opening part having a radius of curvature of R2 mm. The rotor satisfies R1>R2 and 0
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公开(公告)号：US11959679B2
公开(公告)日：2024-04-16
申请号：US17069072
申请日：2020-10-13
Applicant: REGAL BELOIT AMERICA, INC.
Inventor： Paul S. Mullin , Daniel E. Thompson , Ludovic Andre Chretien
CPC classification number: F25B49/022 , F04D27/004 , F25B31/02 , H02P27/06 , F25B2600/111 , F25B2600/112 , F25B2700/151
Abstract: A fan drive circuit for a variable speed fan motor in a cooling system, includes an inverter configured to supply a current signal to stator windings of the variable speed fan motor, a frequency detection circuit coupled to an output stage of an inverter of a compressor motor of the cooling system and configured to detect a first frequency of a compressor current signal at the output stage of a variable speed compressor drive circuit and generate a frequency signal, and a digital signal processor (DSP) coupled to the inverter and the frequency detection circuit. The DSP is configured to receive the frequency signal corresponding to the first frequency from the frequency detection circuit, select a second frequency corresponding to the first frequency at which to operate the variable speed fan motor, and transmit control signals to the inverter to supply current to the stator windings at the second frequency.
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公开(公告)号：US20240035711A1
公开(公告)日：2024-02-01
申请号：US17815474
申请日：2022-07-27
Applicant: TRANE INTERNATIONAL INC.
Inventor： Matthew Cambio
Abstract: A compressor driven by a variable-frequency drive (VFD) is provided to supplement operation of another compressor of a heating, ventilation, air conditioning, and refrigeration (HVACR) system, such as heat pump operations at low ambient temperatures. The VFD is controlled to provide efficient pressure ratios for each compressor of the HVACR system when the compressor driven by the VFD is used to supplement the other compressor. The compressor driven by the VFD can be included as a built-in compressor of the HVACR system or added subsequently as part of a booster package.
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Patent Agency Ranking
公开(公告)号：US11888370B2
公开(公告)日：2024-01-30
申请号：US17273873
申请日：2018-10-30
Applicant: Mitsubishi Electric Corporation
Inventor： Atsushi Matsuoka , Koji Yabe , Toshio Arai
IPC: H02K3/28 , H02K15/02 , F04C18/02 , F04C29/00 , F25B31/02 , H02K1/16 , H02K3/02 , H02K3/34 , H02K3/48 , H02K15/00 , H02K15/06
CPC classification number: H02K3/28 , F04C18/0207 , F04C29/0085 , F25B31/02 , H02K1/165 , H02K3/02 , H02K3/345 , H02K3/48 , H02K15/0081 , H02K15/024 , H02K15/065 , F04C2240/102
Abstract: A stator includes a stator core having a plurality of slots in a circumferential direction about an axis and having an end surface in a direction of the axis, and a first coil and a second coil of different phases which are wound on the stator core in distributed winding. A winding factor is 1. Each of the first coil and the second coil has winding portions, the number of which corresponds to the number of poles. The winding portions include first and second winding portions adjacent to each other in the circumferential direction. The first and second winding portions are inserted into one slot of the plurality of slots and extend from the one slot to both sides in the circumferential direction on the end surface. The first and second coils are annularly disposed in different positions in a radial direction about the axis on the end surface.
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公开(公告)号：US20240007019A1
公开(公告)日：2024-01-04
申请号：US18253996
申请日：2021-01-06
Applicant: Mitsubishi Electric Corporation
Inventor： Haruka MATSUO , Takaaki TAKAHARA , Koichi ARISAWA , Keisuke UEMURA , Yosuke HACHIYA
CPC classification number: H02M7/537 , F25B31/02 , F25B2600/021
Abstract: A power converter includes a converter that rectifies an alternating-current voltage applied from an alternating-current power supply, a capacitor connected to output ends of the converter, an inverter connected both ends of the capacitor, and a controller that controls an operation of the inverter. A voltage output from the converter includes a ripple component due to a voltage fluctuation of the alternating-current voltage. When the controller performs acceleration and deceleration control on the motor, the controller changes a rotational speed command from a command value during the normal control, in a first period in which a rotational speed of the motor is in a first speed range.
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公开(公告)号：US20240007018A1
公开(公告)日：2024-01-04
申请号：US18255157
申请日：2021-03-01
Applicant: Mitsubishi Electric Corporation
Inventor： Hiroyuki NAKAGAMI , Hiroki SUZUKI
CPC classification number: H02M7/219 , H02M5/4585 , H02M1/0009 , H02M1/088 , H02M1/32 , H02P27/06 , F25B31/02 , F25B2600/021
Abstract: An AC/DC converter includes: a charge accumulation unit including first and second capacitors connected in series; a switching unit including a switch unit; a control unit; a switch drive unit; and first current and second current detection units. The switch unit includes first and second switching elements connected in series. The switching unit switches between charging and non-charging of each of the first and second capacitors. The switch drive unit causes the first and second switching elements to perform an ON/OFF operation exclusively to each other. A current detector of the first current detection unit is disposed between a rectifier circuit and the switch unit. The control unit detects a current flowing through the switch unit on the basis of based on a difference value between a detection value of a first current detected by the first current detection unit and a detection value of a second current detected by the second current detection unit.
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公开(公告)号：US20230344299A1
公开(公告)日：2023-10-26
申请号：US18305463
申请日：2023-04-24
Applicant: Hanon Systems
Inventor： Senol Gecgel , Johannes Stausberg , Bodo Schröder
Abstract: An arrangement for guiding electrical connections through an opening of a housing for a device for driving a compressor, having a connection arrangement with at least one holding element and at least one electrically conductive connection element, is based on the object of indicating a solution which enables a simple and secure guiding of electrical connections through a housing, wherein the effort for the production and the assembly and the costs connected thereto are to be minimized and at the same time, the preciseness during assembly and thus the quality are to be improved. This object is achieved in that the holding element has one positioning means each on two opposite sides.
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公开(公告)号：US20230238840A1
公开(公告)日：2023-07-27
申请号：US18126694
申请日：2023-03-27
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Daisuke HIRATSUKA , Hiroshi HIBINO
Abstract: A motor apparatus includes a casing, a stator disposed in the casing, a rotor disposed on an inner circumference of the stator, a shaft disposed on an inner circumference of the rotor, a functional part disposed on an outer circumference of a first member, and a heat-resistant part disposed between the functional part and a second member. The first member is the stator or the shaft. The second member is the casing or the rotor.
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