公开(公告)号：US20240030763A1

公开(公告)日：2024-01-25

申请号：US18366344

申请日：2023-08-07

Applicant: TRANE INTERNATIONAL INC.

Inventor： Fredrik Boxberg ,  Charles J. Peterson ,  Yubo Nian ,  Petri J. Mäki-Ontto ,  Lauri Juhani Salmia ,  Russell T. Abbott ,  Tomas Fajt ,  Seth M. McGill

IPC: H02K1/278 ,  H02K11/01 ,  H02K15/03

CPC classification number: H02K1/278 ,  H02K11/012 ,  H02K15/03

Abstract: Permanent magnet rotors for electric motors, particularly electric motors for use in compressors, improve the electromagnetic efficiency of the motor. The rotors can include retention of surface permanent magnets using one or more of retaining features on the motor and/or pole spacers interfacing with corresponding features on a rotor core, the use of a monolithic magnet in the rotor, and/or use of a carbon fiber sleeve. The rotor can include an eddy current shield, disposed on the rotor core, on a surface of the rotor, or located within a sleeve surrounding the rotor. The rotor can be sized such that an air-gap between the rotor and a stator of a motor using the rotor is a predetermined amount that reduces electromagnetic losses such as eddy current losses.

公开(公告)号：US20230421087A1

公开(公告)日：2023-12-28

申请号：US17849416

申请日：2022-06-24

Applicant: Trane International Inc.

Inventor： Benjamin Sykora ,  Seth M. McGill

IPC: H02P27/08 ,  H02M5/458 ,  H02P23/14

CPC classification number: H02P27/08 ,  H02P23/14 ,  H02M5/458

Abstract: An apparatus and method for reducing motor magnetic losses via reduction of temporal harmonics by control of a direct current (DC) link voltage. In one embodiment, the apparatus includes an inverter for converting DC power into alternating current (AC) power for an electric motor. The apparatus also includes a voltage source, which may take form in a rectifier that is configured to provide the DC output voltage to the inverter via a DC link. The voltage source is configured to adjust a magnitude of the DC output voltage based on a rotational speed of the electric motor. The voltage source may also adjust the magnitude of the DC output voltage based on a power output of the inverter.

公开(公告)号：US20220209598A1

公开(公告)日：2022-06-30

申请号：US17139253

申请日：2020-12-31

Applicant: TRANE INTERNATIONAL INC.

Inventor： Fredrik Boxberg ,  Charles J. Peterson ,  Yubo Nian ,  Petri J. Mäki-Ontto ,  Lauri Juhani Salmia ,  Russell T. Abbott ,  Tomas Fajt ,  Seth M. McGill

IPC: H02K1/27 ,  H02K11/01 ,  H02K15/03

Abstract: Permanent magnet rotors for electric motors, particularly electric motors for use in compressors, improve the electromagnetic efficiency of the motor. The rotors can include retention of surface permanent magnets using one or more of retaining features on the motor and/or pole spacers interfacing with corresponding features on a rotor core, the use of a monolithic magnet in the rotor, and/or use of a carbon fiber sleeve. The rotor can include an eddy current shield, disposed on the rotor core, on a surface of the rotor, or located within a sleeve surrounding the rotor. The rotor can be sized such that an air-gap between the rotor and a stator of a motor using the rotor is a predetermined amount that reduces electromagnetic losses such as eddy current losses.

公开(公告)号：US20210328481A1

公开(公告)日：2021-10-21

申请号：US16853372

申请日：2020-04-20

Applicant: Trane International Inc.

Inventor： Benjamin J. Sykora ,  Seth M. McGill ,  Petri J. Mäki-Ontto

IPC: H02K11/02 ,  H02K9/19 ,  H02K21/14 ,  H03H1/00

Abstract: Architectures or techniques are presented that can improve operation of permanent magnet (PM) motors, which can be part of a compressor or other heating, ventilation, and air conditioning (HVAC) device. Such improvements can be achieved by integration of inductive filtering into the motor assembly. A higher overall inductance can reduce current ripple and can further result in a lower total harmonic distortion, reduced power loss, and reduced heat generated. For example a first architecture can include a ferromagnetic core element in the PM motor that can cause a non-torque-producing reluctance path to the shaft. A second architecture can integrate a signal filter, which is customarily external, into a housing of the PM motor. Such can significant reduce costs and provide other advantages. A third architecture can couple an inductor (e.g., of the signal filter) to the shaft. Rotation of the shaft can thus serve to provide additional cooling for the inductor.