JP2012016211A - Ventilation structure of stator in main motor for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve miniaturization of a main motor as a whole by bringing a stator iron core in contact with a cooler and diffusing the heat accumulated in the stator iron core to the outside of the motor efficiently.SOLUTION: A groove is formed in the outer periphery of a stator iron core in the axial direction, and an opening is formed at the portion of a stator frame opposite to the groove. A fin installed in a cooler is directed toward the outside of a motor from the opening of the stator frame. The cooler is sandwiched between the stator iron core and the stator frame. Thus the main motor as a whole can be miniaturized and the heat accumulated in the stator iron core can be diffused to the outside of the motor efficiently.

Description

  The present invention relates to a structure of a ventilation structure for a stator of a main motor installed in a vehicle carriage.

  As the main motor continues to operate, the inside of the main motor generates heat, so a cooling path is required.However, in the case of a fully enclosed internal fan system, it is located outside the stator frame to reduce the temperature of the cooling air inside the machine. A cooler is often provided.

  In this case, since the cooler is provided outside the stator frame, the entire main motor has to be large, or cooling fins for directly cooling the stator frame have to be provided in the stator frame. Further, since the stator core and the cooler are installed apart from each other, there is a problem in efficiently dissipating the heat accumulated in the stator core to the outside of the machine.

Japanese Patent Laid-Open No. 9-205758

  SUMMARY OF THE INVENTION An object of the present invention is to provide a main motor that is capable of efficiently dissipating heat accumulated in a stator core to the outside of the machine by changing the arrangement of the cooler, and is downsized.

  According to the first aspect of the present invention, a groove is provided in the axial direction on the outer diameter side of the stator core, an opening is provided in a portion of the stator frame facing the groove, and the opening of the stator frame extends outward from the machine. A cooler having directed fins is provided, the cooler being sandwiched between the stator core and the stator frame.

  The ventilation structure of the present invention has an advantage that the entire main motor can be reduced in size, and heat accumulated in the stator core can be efficiently dissipated outside the machine.

It is explanatory drawing which shows the Example of this invention. Example 1 It is explanatory drawing which shows an example of the past. It is sectional drawing which shows the Example of this invention. Example 1

  Examples and the like will be described with reference to FIGS. 1, 2, and 3.

  FIG. 1 is a cross-sectional view showing an embodiment of the present invention, wherein 1 is a stator frame, 2 is a stator core, 3 is a cooler, 4 is a vent hole, 5 is a stator core restraint, and 6 is a fan. is there.

  FIG. 2 is a cross-sectional view showing an example of the prior art, in which 11 is a stator frame, 12 is a stator core, 13 is a cooler, 14 is a vent hole, 15 is a stator core restraint, 16 is a fan, and 17 is An inlet of the cooler and 18 is an exhaust of the cooler.

  FIG. 3 is a cross-sectional view showing an embodiment of the present invention, and the reference numerals are the same as those in FIG. A part of the cooler 3 is sandwiched between the stator frame 1 and the stator core 2.

  A ventilation hole 4 is configured by a groove provided in the cooler 3 and the stator core 2. One or a plurality of ventilation holes 4 can be provided at any position of the stator core 2. The ventilation hole 4 passes through the stator iron core restraint 5.

  On the side of the ventilation hole of the cooler 3 in FIG. 3, the plane is shown in a plane on the cross section, but this surface is provided with unevenness parallel to the ventilation direction, and the heat accumulated in the stator core during ventilation is efficiently passed through the cooler. It goes without saying that it is cooled.

  The stator core and cooler are brought into contact with each other to efficiently dissipate the heat accumulated in the stator core to the outside of the machine. The main electric motor aiming at the improvement is provided.

DESCRIPTION OF SYMBOLS 1 Stator frame 2 Stator iron core 3 Cooler 4 Ventilation hole 5 Stator iron core restraint 6 Fan 11 Stator frame 12 Stator iron core 13 Cooler 14 Ventilation hole 15 Stator iron core restraint 16 Fan 17 Cooler inlet 18 Cooler exhaust

Claims (1)

  In a stator motor ventilation structure installed in a vehicle carriage, an axial groove is provided on the outer diameter side of the stator core, and an opening is provided in a portion of the stator frame facing the groove. A cooler having fins directed outwardly from the machine is provided at the opening of the stator frame, and the cooler is sandwiched between the stator core and the stator frame. Ventilation structure of the stator of the main motor.

Images