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Connection structure for coil and bus bar, and motor having same

A technology of bus bars and coils, applied in the field of motors, can solve problems such as poor connection, variable complexity, etc., and achieve the effect of stable connection

Inactive Publication Date: 2019-08-23
PANASONIC INTPROP MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in the middle of the coils wound into one, there is a part that does not come into contact with the bus bar, etc., and the contact objects and contact shapes are different depending on the location, and it is easy to become complicated.
It is possible that this could cause a bad connection between the two
[0008] On the other hand, if the coil is formed by winding a wire having a rectangular cross-section as disclosed in Patent Document 1, there is a possibility that the above-mentioned problems can be avoided.
However, there is also the potential for several problems to occur in this case
For example, when the space density of the joint between the coil and the bus bar becomes high due to the relationship between the size of the motor and the number of slots, it is difficult to move the melting nozzle for pressurization and heating to the joint

Method used

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  • Connection structure for coil and bus bar, and motor having same
  • Connection structure for coil and bus bar, and motor having same
  • Connection structure for coil and bus bar, and motor having same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] (motor structure)

[0041] Figure 1A It is a plan view of the motor of Embodiment 1. Figure 1B It is a side view of the motor of Embodiment 1. Figure 1C yes Figure 1B Sectional view at line 1C-1C'. In addition, in Figure 1C In , only the cross section of the main part is shown with hatching. The motor 1 includes a rotor 3 , a shaft 2 , a stator 4 , coils U11 to U41 , V12 to V42 , W11 to W41 , and bus bars 51 to 54 inside a casing (not shown).

[0042] In the following description, as Figure 1A As shown, the longitudinal direction of the axis 2 (direction perpendicular to the paper surface) is referred to as the Z-axis direction. Such as Figure 1A As shown, the directions perpendicular to the longitudinal direction of the axis 2 (directions parallel to the paper surface) are referred to as the X-axis direction and the Y-axis direction. The X-axis direction and the Y-axis direction are perpendicular to each other.

[0043] "Integration" or "integration" n...

Deformed example 1

[0089] Figure 8A is a schematic cross-sectional view showing the connection structure between the coil and the bus bar of the motor according to Modification 1. Figure 8B It is a schematic cross-sectional view showing another example of the connection structure between the coil and the bus bar of the motor according to Modification 1. Figure 8C It is a cross-sectional schematic diagram showing still another example of the connection structure between the coil and the bus bar of the motor according to Modification 1. Such as Figure 8A As shown, a convex portion 120 is provided at the tip of the lead-out portion V12a. A concave portion 130 is provided at the tip of the lead-out portion 52a. In a state where the above-mentioned members are fitted, the side surface of the convex portion 120 is joined to the inner surface of the concave portion 130 . Accordingly, the above-described effects can also be obtained. In this case, since there are multiple bonding surfaces 90, c...

Deformed example 2

[0099] Figure 9A , 9B It is a schematic cross-sectional view showing the connection structure between the coil and the bus bar of the motor according to Modification 2. These figures are views of the same connecting portion viewed from different directions.

[0100] So far, the case where the longitudinal direction of the lead-out portion V12a of the coil V12 and the longitudinal direction of the lead-out portion 52a of the bus bar 52 are the same (in the Z-axis direction) has been described.

[0101] However, depending on the design of the motor 1, the connection between the coil V12 and the bus bar 52 may be performed in a state where the above-mentioned lead portions intersect, for example, two lead portions V12a, 52a are perpendicular to each other.

[0102] Also in this case, if Figure 9A , 9B As shown, by providing the stepped portions 100 and 110 at the tips of the lead-out portions, the same effect as that of the structure shown in Embodiment 1 can be obtained. ...

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PUM

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Abstract

The connection structure is for a bus bar and a coil to be mounted to a stator of a motor, wherein the coil and the bus bar each have a drawer part. Provided to the leading end of least one of the drawer parts is a stepped part having a side surface that extends substantially parallel to the longitudinal direction of the drawer part, by cutting a corner of the leading end into a stepped shape. Thecoil and the bus bar are connected in a state where the side surface of the stepped part of one of the drawer parts abuts against the other drawer part.

Description

technical field [0001] The technology disclosed herein relates to a connection structure between a coil and a bus bar mounted on a stator of a motor and a motor having the connection structure. Background technique [0002] In recent years, the demand for motors has increased in industrial and automotive applications. Among them, improvement in efficiency and cost reduction of motors are desired. [0003] As one of methods for improving the efficiency of a motor, it is known to increase the slot fill factor of coils arranged in slots of a stator. By increasing the slot fill factor of the coil, it is possible to suppress loss due to current flowing through the coil when the motor is driven. [0004] As a method of increasing the slot fill ratio of the coil, a configuration in which a cast coil made of copper is disposed in the slot has been proposed (for example, refer to Patent Document 1). [0005] Generally, in order to supply current to a coil of a motor, current is of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/52H02K3/18
CPCH02K3/18H02K2203/09H02K3/522Y02T10/64H02K3/02H02K21/16H02K2203/06
Inventor 菱田光起山内弘和吉川祐一额田庆一郎
Owner PANASONIC INTPROP MANAGEMENT CO LTD
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