Double-rotor motor

Patent metadata

Field	Value
Publication number	US-9419497-B2
Application number	US-201313873519-A
Country	US
Kind code	B2
Filing date	Apr 30, 2013
Priority date	Nov 9, 2010
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

Provided is a double-rotor type motor including: a stator; a double-rotor that is positioned at a certain gap on an outer surface and an inner surface of the stator; a rotor support on which the double-rotor is integrally formed and a plurality of air passages are radially penetratively formed; and a heat dissipation unit that is integrally formed with the rotor support and that forcibly ventilates outer air into the air passages during rotation of the rotor, to thereby dissipate heat generated from the stator. Thus, outer air may be forcibly ventilated to the stator, to thereby improve the heat dissipation efficiency of the stator.

First claim

What is claimed is:

1. A double-rotor type motor comprising:
a stator;
a double-rotor including an inner rotor and an outer rotor;
a rotor support having an annular groove formed open towards a lower side thereof, the annular groove accommodating the stator and having an inner surface, an outer surface facing the inner surface and an open lower portion, wherein the inner rotor is mounted on the inner surface and the outer rotor is mounted on the outer surface;
a plurality of air passages formed above the annular groove, each of the air passages penetrating the rotor support while forming a support rib in a radial direction between neighboring air passages;
an outer blade formed on an upper surface of the support rib, the outer blade protruding upwards by a predetermined height; and
an inner blade formed on an inner surface opposite to the upper surface of the support rib, the inner blade protruding downwards by a predetermined height,
wherein the plurality of the air passages, the outer blade and the inner blade form a heat dissipation unit forcibly ventilating outer air through the air passages into the annular groove during rotation of the double-rotor, to thereby dissipate heat generated from the stator.

2. The double-rotor type motor according to claim 1 , wherein the inner blade and the outer blade protrude vertically from the inner surface and the upper surface of the support rib.

3. The double-rotor type motor according to claim 1 , further comprising a guide protrusion formed with the outer blade at a radially outer side thereof to guide the outer air to the air passages.

4. The double-rotor type motor according to claim 3 , wherein the guide protrusion is extended in a circumferential direction from both sides of the outer blade and has a same height as that of the outer blade.

5. A double-rotor type motor comprising:
a stator;
a double-rotor including an inner rotor and an outer rotor having a rotational axis;
a rotor support having an annular groove formed open towards a lower side thereof, the annular groove accommodating the stator and having an inner surface, an outer surface facing the inner surface and an open lower portion, wherein the inner rotor is mounted on the inner surface and the outer rotor is mounted on the outer surface;
a plurality of air passages formed above the annular groove, each of the air passages penetrating the rotor support while forming a support rib in a radial direction between neighboring air passages;
a stator support supporting the stator through the open lower portion of the annular groove;
a heat dissipation unit that is integrally formed with the rotor support and that forcibly ventilates outer air into the air passages during rotation of the double-rotor, to thereby dissipate heat generated from the stator; and
a Hall sensor assembly mounted on the stator support,
wherein the Hall sensor assembly comprises: a Hall sensor holder mounted on the stator support, the Hall sensor holder including a vertical accommodator and a horizontal coupler; a Hall sensor substrate inserted into the vertical accommodator in a vertical direction; Hall sensors mounted on the sensor substrate and facing permanent magnets of the outer-rotor, and
wherein the vertical direction is substantially parallel to the rotational axis.

6. The double-rotor type motor according to claim 5 , wherein the Hall sensor assembly comprises pin type terminals for connection to outer terminals.

7. The double-rotor type motor according to claim 5 ,
wherein the horizontal coupler is bent a number of times to increase a surface area thereof and surface-contacted with and fastened to the stator support.

8. The double-rotor type motor according to claim 5 , wherein an upper end portion of the vertical accommodator of the Hall sensor holder contacts a core of the stator.

9. The double-rotor type motor according to claim 5 , wherein the Hall sensors are surface-mount device (SMD) components that are surface-mounted on the Hall sensor substrate, together with other components provided on the Hall sensor substrate.

10. The double-rotor type motor according to claim 5 , wherein the Hall sensor assembly is disposed separately from a power supply that applies power to coils of the stator.

11. The double-rotor type motor according to claim 5 , wherein an assembly frame is mounted on the stator support, the Hall sensor assembly is mounted on an upper surface of the assembly frame, and a power supply is mounted on a lower surface of the assembly frame.

Assignees

• Amotech Co Ltd

Inventors

• Kim Byoung Soo

Classifications

• H02K21/12 Primary

  with stationary armatures and rotating magnets · CPC title

• H02K9/04 Primary

  having means for generating a flow of cooling medium · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K9/02

  by ambient air flowing through the machine · CPC title