Winding cooling structure of shaft motor

Patent metadata

Field	Value
Publication number	US-9680354-B2
Application number	US-201414540998-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Nov 13, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A winding cooling structure of shaft motor includes a chamber in which multiple annular windings are received. A cooling fluid is filled up in the chamber to possibly contact the surfaces of every part of the respective windings. Therefore, heat generated by the windings can be quickly transferred to the cooling fluid around the windings and dissipated. Accordingly, in operation, the heat dissipation efficiency of the shaft motor can be enhanced to prolong lifetime of the motor and ensure the performance of the motor.

First claim

What is claimed is:

1. A winding cooling structure of shaft motor, comprising:
a mover seat being a tubular body section and having a closed annular chamber being coaxially formed in the mover seat;
multiple annular windings serially connected with each other and coaxially received in the chamber; and
a predetermined volume of cooling fluid contained in the chamber and around the windings and filling the chamber;
wherein the mover seat further includes an inner tube, a tubular housing coaxially fitted around the inner tube and two end pieces respectively disposed at two axial ends of the housing in abutment against two axial ends of the inner tube, an inner circumference of the housing and an outer circumference of the inner tube are spaced apart, the chamber being sealed by the end pieces;
wherein the mover seat further includes two first sealing rings respectively clamped between two ends of the housing and the end pieces and two second sealing rings respectively clamped between two ends of the inner tube and the end pieces.

2. The winding cooling structure of shaft motor as claimed in claim 1 , wherein inner diameter of the housing is larger than outer diameter of the windings.

3. The winding cooling structure of shaft motor as claimed in claim 1 , wherein outer diameter of the inner tube is smaller than inner diameter of the windings.

4. The winding cooling structure of shaft motor as claimed in claim 1 , wherein the mover seat further includes two annular insertion grooves respectively coaxially formed on the end pieces, two axial ends of the inner tube being respectively inserted in the insertion grooves.

5. The winding cooling structure of shaft motor as claimed in claim 1 , wherein cooling fluid is air or a coolant.

6. The winding cooling structure of shaft motor as claimed in claim 1 , wherein the mover seat further includes an inlet passage and an outlet passage, the inlet passage and the outlet passage being spaced from each other and respectively disposed in the mover seat in communication with the chamber, whereby the cooling fluid can flow into the chamber from outer side through the inlet passage and then flow out of the chamber from the outlet passage.

7. The winding cooling structure of shaft motor as claimed in claim 6 , wherein the inlet passage and the outlet passage are respectively positioned on one side of the mover seat in adjacency to two axial ends thereof.

Assignees

• Hiwin Mikrosystem Corp

Inventors

• Chang Yu-Jung
• Fan Chih-Kai
• Huang Sheng-Shiun

Classifications

• H02K3/24

  with channels or ducts for cooling medium between the conductors · CPC title

• H02K41/031

  of the permanent magnet type · CPC title

• H02K33/12

  with armatures moving in alternate directions by alternate energisation of two coil systems · CPC title

• H02K9/197 Primary

  in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator · CPC title