Electric motor

Patent metadata

Field	Value
Publication number	US-10965190-B2
Application number	US-201615284772-A
Country	US
Kind code	B2
Filing date	Oct 4, 2016
Priority date	Oct 5, 2015
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

Electric motor comprising a rotor and a stator ( 2 ), the stator comprising a body ( 3 ) forming a frame and a windings assembly ( 4, 5 ) housed in slots of the body. The electric motor comprises at least one rod ( 16, 23 ) used to connect, to one another, at least two fixed assembled parts of the electric motor, the rod extending into a housing ( 9 ) formed in the body over the entire length thereof in order to emerge on each side of the body.

First claim

The invention claimed is:

1. An electric motor comprising a rotor and a stator ( 2 ; 31 ), the stator comprising a body ( 3 ; 30 ) forming a frame and a windings assembly ( 4 , 5 ; 43 , 37 ) housed in slots ( 8 ) of the body;
the electric motor comprising at least one rod ( 16 , 23 ) to fix, to one another, at least two fixed assembled parts of the electric motor,
the length of each rod being greater than that of the body of the stator,
the rod extending into a housing ( 9 ) formed in the body over the entire length thereof in order to emerge on each side of the body,
wherein the rod is distinct from the assembled parts,
wherein the assembled parts comprise the body and an electric board ( 11 , 13 ; 38 , 39 ) positioned on a superior or inferior face of the body and comprising electrical components,
wherein a first end of each at least one rod emerges from the housing in which it is positioned and extends from the relevant face of the body of the stator as far as the electric board, running alongside winding overhangs, the electric board being fixed to each at least one rod, and
wherein the electric components comprise sensors intended to measure a position of the rotor.

2. The electric motor according to claim 1 comprising two separate coil assemblies housed in the slots of the body, the assembled parts comprising the body and two electric boards each one positioned on a different face of the body.

3. The electric motor according to claim 1 , in which an electric lead electrically connected to the electric board is routed along inside the rod.

4. The electric motor according to claim 1 , in which the assembled parts comprise distinct radial segments ( 32 ) constituting the body and defining the slots.

5. The electric motor according to claim 4 , in which two annular rings ( 41 ) each one positioned against a different face of the body and through which the rod extends are also used to join the radial segments together.

6. The electric motor according to claim 1 , in which the assembled parts comprise laminations stacked in an axial direction (X) to form the body.

7. The electric motor according to claim 1 , in which the assembled parts comprise the body and a casing of the electric motor, and in which the rod allows the attachment to the body of a rotation-proofing lug ( 25 ) intended to secure the body and the casing in terms of rotation.

8. The electric motor according to claim 1 , in which the housing ( 9 ) is situated at the periphery of the body.

9. An electromagnetic actuator comprising an actuating member and an electric motor according to claim 1 , used to drive the actuating member.

10. An electric motor comprising a rotor and a stator ( 2 ; 31 ), the stator comprising a body ( 3 ; 30 ) forming a frame and a windings assembly ( 4 , 5 ; 43 , 37 ) housed in slots ( 8 ) of the body;
the electric motor comprising at least one rod ( 16 , 23 ) to fix, to one another, at least two fixed assembled parts of the electric motor,
the rod extending into a housing ( 9 ) formed in the body over the entire length thereof in order to emerge on each side of the body,
wherein the rod is distinct from the assembled parts,
wherein the assembled parts comprise the body and an electric board ( 11 , 13 ; 38 , 39 ) positioned on a superior or inferior face of the body and comprising electrical components, and
wherein the electric components comprise sensors intended to measure a position of the rotor.

11. The electric motor as claimed in claim 10 ,
wherein the housing ( 9 ) is situated at the periphery of the body.

Assignees

• Safran Landing Systems

Inventors

• Evenor Eric
• Leynaert Francois-Noel
• Pierra Raphael

Classifications

• H02K1/148 Primary

  Sectional cores (H02K1/141 takes precedence) · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02K2213/06

  Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements · CPC title

• H02K3/18

  Windings for salient poles · CPC title