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Axial flux electric machine comprising a radially inner thrust bearing and a radially outer thrust bearing

A technology of thrust bearings and inner bearings, which is applied to synchronous motors with stationary armatures and rotating magnets, synchronous motors for single-phase currents, and the manufacture of motor generators, etc., which can solve the problem of large air gap distances and reduced Actuator acceleration and torque density, large package, etc.

Inactive Publication Date: 2019-02-05
GENESIS ROBOTICS & MOTION TECH CANADA ULC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first approach results in a heavier device and larger package, which reduces actuator acceleration and torque density
The latter method results in a reduction in torque due to the greater air gap distance

Method used

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  • Axial flux electric machine comprising a radially inner thrust bearing and a radially outer thrust bearing
  • Axial flux electric machine comprising a radially inner thrust bearing and a radially outer thrust bearing
  • Axial flux electric machine comprising a radially inner thrust bearing and a radially outer thrust bearing

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Experimental program
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Embodiment Construction

[0080] Several terms used throughout the text will be defined first.

[0081] A carrier as used herein in the context of an electric machine when referring to a rotating machine may include a stator or a rotor.

[0082]A rotor as used herein may be circular. Rotor can also refer to the armature or reaction rail of a linear motor. The stator may be circular. It may also refer to the armature or reaction rail of a linear motor.

[0083] The teeth may be referred to as posts.

[0084] In an electric machine, the stator or rotor may have an array of commutating electromagnets defined by coils wound around a post, while the other may have poles defined by permanent magnets or coils or both coils and permanent magnets . The electric machines can be configured as motors or generators.

[0085] Permanent magnets can be used in conjunction with electromagnets on the rotor and / or stator to add flux to the system.

[0086] PM refers to permanent magnet. EM refers to electromagnet...

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Abstract

The invention provides an electric motor. The electric motor has a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles. The first and second carriers each define an axis. An airgap is formed between the first and second carriers when in an operational position. An inner thrust bearing connects the first and second carriers and is arranged to allow relative rotary motion of the carriers. An outer thrust bearing connects the first and second carriers and is arranged to allow relative rotary motion of the carriers.The electromagnetic elements of each of the first and second carriers are arranged radially inward of the outer thrust bearing and radially outward of the inner thrust bearing. The inner thrust bearing and the outer thrust bearing are arranged to maintain the airgap against a magnetic attraction of the electromagnetic elements of the first and second carriers.

Description

technical field [0001] motor. Background technique [0002] In the design of electric machines, it is known to select structural parameters such as the number of slots according to the intended application and the desired performance characteristics of the machine. However, not all structural parameter values ​​are used in practice. There is room for improvement in motor performance, especially in robotics. [0003] Electric machines typically use turns of conductive wire wound around soft magnetic stator posts (teeth) to generate flux. The manufacturing process for this type of motor configuration can be time consuming and expensive. Also, such motors typically have a torque-to-mass ratio that makes them relatively heavy in moving actuator applications, such as in robotics, where an upstream actuator must support and accelerate the weight of a downstream actuator. [0004] Common permanent magnet direct drive motors can be difficult to assemble due to the high permanent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/08B25J9/12H02K3/00
CPCH02K7/08H02K7/088H02K1/182H02K2205/03H02K9/197H02K1/278H02K1/2795B25J9/108B25J9/126H02K21/24H02K41/031H02K7/086H02K7/14B25J9/0009B25J9/12B25J15/0009B25J15/0233B25J19/0029H02K1/32H02K3/12H02K3/24H02K3/26H02K5/18H02K16/04H02K19/10H02K21/14H02K21/22H02K2201/12H02K2213/03H02K1/02H02K1/20H02K1/276H02K1/28H02K5/04H02K5/16H02K9/02H02K15/04H02K9/00B25J15/08B25J17/00H02K1/06H02K1/08H02K1/14H02K1/16H02K1/24H02K1/27H02K1/274H02K1/2773H02K3/04H02K21/00H02K1/22
Inventor 詹姆斯·B·克拉森达米安·斯帕索夫布兰得利·克里斯多夫·蒲柏
Owner GENESIS ROBOTICS & MOTION TECH CANADA ULC