JP2019193360A - Connection structure between stator temperature sensor and external terminal - Google Patents

Abstract

To provide a connection structure between a stator temperature sensor and an external terminal in which a manual work involved when a harness wire is arranged is reduced during a stator assembling step.SOLUTION: The connection structure is between a temperature sensor for a stator of a rotary electric machine and an external terminal. The stator includes a stator main body including a stator core and three-phase coils wound around the stator core, and a neutral wire bus bar which is connected to each of the three-phase coils at the positions of coil ends projected axially outward from the stator core. The temperature sensor is disposed and fixed to the neutral wire bus bar. A temperature sensor connector is disposed on the surface of the neutral wire bus bar. A harness wire is attached to the external terminal. A harness connector is attached to an end, of the harness wire, opposite to the external terminal. The harness connector is configured to be fitted to the temperature sensor connector.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connection structure between a temperature sensor of a stator and an external terminal.

  As one structure of a stator that is a stator of a rotating electrical machine, one having a stator core and a segment coil composed of a plurality of segments is known. Patent Document 1 discloses a configuration in which a temperature sensor for detecting the temperature of a stator coil (segment coil) constituting a stator is provided in a rotating electrical machine.

Japanese Patent Laid-Open No. 2006-063630

  As in Patent Document 1, in a rotating electrical machine having a stator temperature sensor, it is necessary to connect the stator temperature sensor and an external terminal. When the harness wire extends from the temperature sensor to the outside of the stator, the harness wire needs to be routed in the stator assembly process.

  FIGS. 6 to 8 are schematic diagrams for explaining the handling of the harness wire 552 in the assembly process of the stator 501 in the rotating electric machine under development. As shown in FIGS. 6 to 8, the stator 501 includes a stator core 21, a segment coil 22, and a neutral wire bus bar 42. A temperature sensor 44 is molded on the neutral wire bus bar 42, and a harness wire 552 extends from the temperature sensor 44 to the outside of the stator 501.

  In the assembly process of the stator 501, in the welding process of the coil end 13, as shown in FIG. 6, it is necessary to manually hook the harness wire 552 to a hook 562 provided on a welding jig or the like. Further, in the welding inspection process of the coil end 13, the powder / varnish dipping process (insulation process process), and the pre-conveyance inspection process, it is necessary to prevent the harness wire 552 from drooping when the stator 501 is reversed. There is. For this reason, as shown in FIG. 7, the harness wire 552 is fixed to the yoke 23 using the clip 563 and the string 564 by manual work. Further, as shown in FIG. 8, the harness wire 552 and the connector 553 are manually pushed into the gap between the coil ends 13 so that the harness wire 552 is not caught by something as shown in FIG. . As described above, in the assembly process of the stator 501 in the rotating electric machine under development, useless manual work has occurred for the handling of the harness wire 52.

  The present invention has been made in view of the above background, and provides a connection structure between a temperature sensor of a stator and an external terminal, which can reduce manual work associated with wiring of a harness wire in an assembly process of the stator. For the purpose.

  The present invention relates to a connection structure between a temperature sensor of a stator of a rotating electrical machine and an external terminal, and the stator includes a stator body including a stator core, a three-phase coil wound around the stator core, and a shaft formed from the stator core. A neutral wire bus bar connected to each of the three-phase coils at a position of a coil end projecting outward in the direction, the temperature sensor being fixedly disposed on the neutral wire bus bar, and the neutral wire bus bar A temperature sensor connector is disposed on the surface of the wire, a harness wire is attached to the external terminal, a harness connector is attached to an end of the harness wire opposite to the external terminal, and the harness connector is connected to the temperature connector. It is comprised so that it may fit with a sensor connector.

  As described above, the harness wire is connected to the external terminal side. The temperature sensor and the external terminal are connected by connecting the harness connector attached to the harness wire and the temperature sensor connector. For this reason, the harness wire is not connected to the stator until the stator is assembled and the temperature sensor and the external terminal are connected. Therefore, in the stator assembly process, it is possible to eliminate the manual work associated with the handling of the harness wire.

  According to the present invention, it is possible to reduce manual work associated with the handling of the harness wire in the stator assembly process.

It is a schematic diagram which shows an example of schematic structure of the stator in the rotary electric machine to which the connection structure of the temperature sensor and external terminal of the stator concerning this Embodiment was applied. It is a schematic diagram explaining the connection structure which electrically connects a temperature sensor and a case terminal block. It is a schematic diagram explaining the connection of the temperature sensor connector provided with the protective cap, and a harness connector. It is a schematic diagram explaining the connection of the temperature sensor connector provided with the protective cap, and a harness connector. It is a schematic diagram explaining the connection of the temperature sensor connector provided with the protective cap, and a harness connector. It is a schematic diagram explaining the handling of the harness wire in the assembly process of the stator in the rotating electrical machine under development. It is a schematic diagram explaining the handling of the harness wire in the assembly process of the stator in the rotating electrical machine under development. It is a schematic diagram explaining the handling of the harness wire in the assembly process of the stator in the rotating electrical machine under development.

  Embodiments of the present invention will be described below with reference to the drawings. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted as necessary.

  First, a schematic configuration of a stator in a rotating electrical machine to which a connection structure between a temperature sensor of a stator (stator) and an external terminal according to the present embodiment is applied will be described with reference to FIG. FIG. 1 is a schematic diagram illustrating an example of a schematic configuration of a stator 1 in a rotating electrical machine to which a connection structure between a stator temperature sensor and an external terminal according to the present embodiment is applied. As shown in FIG. 1, the stator 1 includes a stator core 21, a segment coil 22 wound around the stator core 21, and a neutral wire bus bar 42.

  The segment coil 22 includes three-phase segment coils 22U, 22V, and 22W. The stator core 21 is formed by laminating substantially cylindrical electromagnetic steel plates in the axial direction of the stator 1 (Z-axis direction in FIG. 1), an annular yoke 23 extending along the stator circumferential direction, and a stator diameter from the inner peripheral surface of the yoke 23. And a plurality of teeth 24 projecting inward in the direction. The plurality of teeth 24 are spaced apart from each other in the circumferential direction, and slots are formed between the teeth 24 adjacent in the circumferential direction of the stator.

  Three-phase segment coils 22U, 22V, and 22W are attached to each tooth 24 through slots between the teeth 24. The three-phase segment coils 22U, 22V, and 22W are coil ends 13 that project from the stator core 21 (the teeth 24 and the yoke 23) to one side in the stator axial direction (axially outside) through slots having different stator circumferential positions. Are bent and joined in the circumferential direction of the stator.

  The three-phase segment coils 22U, 22V, and 22W have coil end ends 32U, 32V, and 32W, respectively. The coil end ends 32U, 32V, 32W are arranged at intervals in the circumferential direction of the stator at the position of the coil end 13 projecting from the stator core 21 to one side in the stator axial direction, and extend along the stator axial direction. A neutral wire bus bar 42 is electrically connected to the coil end ends 32U, 32V, 32W.

  The neutral wire bus bar 42 is electrically connected to the position of each coil end 13 of the three-phase segment coils 22U, 22V, 22W. The neutral wire bus bar 42 is provided with coil end ends 42U, 42V, 42W. The coil end end portion 42U of the neutral wire bus bar 42 is joined to the coil end end portion 32U of the segment coil 22U by welding. Similarly, the coil end end 42V of the neutral wire bus bar 42 is joined to the coil end end 32V of the segment coil 22V by welding, and the coil end end 42W of the neutral wire bus bar 42 is joined to the coil end of the segment coil 22W. The end 32W is joined by welding. Thereby, the three-phase segment coils 22U, 22V, and 22W are star-connected.

  The neutral wire bus bar 42 is formed of, for example, a rectangular conductive wire in which a metal conductor such as a copper wire is covered with an insulating member made of enamel resin or the like. The neutral wire bus bar 42 is in a state in which the metal conductor is exposed by removing the insulating member at the coil end ends 42U, 42V, 42W.

  The neutral wire bus bar 42 is provided with a temperature sensor 44 for detecting the temperature of the segment coil 22. As the temperature sensor 44, for example, a thermistor or a thermocouple can be used. The temperature sensor 44 is fixedly disposed on the neutral wire bus bar 42 while being molded with a molding material such as resin. A temperature sensor connector 50 electrically connected to the temperature sensor 44 is disposed on the surface of the neutral wire bus bar 42.

  Next, a connection structure for electrically connecting the temperature sensor 44 and a case terminal block as an external terminal will be described. In the rotating electrical machine according to the present embodiment, the stator 1 described above is covered with a motor case having a case terminal block. Electric power is supplied to the stator 1 and the temperature sensor 44 via a case terminal block.

  FIG. 2 is a schematic diagram for explaining a connection structure for electrically connecting the temperature sensor 44 and the case terminal block 53. As shown in FIG. 2, the motor case 54, which is a housing that covers the stator 1, includes a case terminal block 53. In FIG. 2, the motor case 54 is depicted only in the periphery of the case terminal block 53. A temperature sensor connector 50 is disposed on the surface of the neutral wire bus bar 42. One end of a harness wire 52 is connected to the case terminal block 53. A harness connector 51 is attached to an end (other end) of the harness wire 52 opposite to the case terminal block 53.

  The harness connector 51 is configured to fit with the temperature sensor connector 50. That is, for example, when the temperature sensor connector 50 is a female connector, the harness connector 51 is a male connector that fits with the temperature sensor connector 50 that is a female connector.

  As described above, the harness wire 52 is connected to the case terminal block 53 side which is an external terminal. Further, the temperature sensor 44 and the case terminal block 53 are connected by connecting the harness connector 51 attached to the harness wire 52 and the temperature sensor connector 50. For this reason, the harness wire 52 is not connected to the stator 1 until the assembly of the stator 1 is completed and the temperature sensor 44 and the case terminal block 53 are connected. Therefore, in the assembly process of the stator 1, the manual work accompanying the handling of the harness wire 52 can be made unnecessary.

  The temperature sensor connector 50 may include a protective cap. 3 to 5 are schematic diagrams for explaining the connection between the temperature sensor connector 50 including the protective cap 55 and the harness connector 51. FIG. As shown in FIGS. 3 to 5, when the temperature sensor connector 50 is a female connector, the protective cap 55 covers the connector connecting portion of the temperature sensor connector 50. The protective cap 55 is configured to be openable and closable with respect to the connector connecting portion of the temperature sensor connector 50, and has a hinge structure, for example.

  As shown in FIG. 3, the protective cap 55 is closed with respect to the connector connecting portion of the temperature sensor connector 50 until the stator 1 is assembled to the motor case 54. As shown in FIG. 4, when the stator 1 is assembled to the motor case 54, the protective cap 55 is opened with respect to the connector connecting portion of the temperature sensor connector 50, and the harness connector 51 is inserted into the temperature sensor connector 50. Thereby, it can prevent that foreign materials, such as powder and varnish used for the insulation process of the stator 1, adhere to a connector connection part.

  As shown in FIG. 5, a lock mechanism may be provided on the protective cap 55 and the harness connector 51 so that the temperature sensor connector 50 and the harness connector 51 are locked in a connected state. The lock mechanism includes a hole 55 a formed in the protective cap 55 and a protrusion 56 formed in the harness connector 51. The temperature sensor connector 50 and the harness connector 51 can be locked by fitting the projection 56 into the hole 55a. The lock mechanism is configured so that the lock between the temperature sensor connector 50 and the harness connector 51 can be locked only when the connection between the temperature sensor connector 50 and the harness connector 51 is complete. By configuring the lock mechanism in this way, the connection between the connectors can be strengthened and the connection failure of the connectors can be reliably prevented. Further, it is possible to prevent the protective cap 55 from falling off during the operation of the rotating electrical machine.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Stator 13 Coil end 20 Stator main body 21 Stator core 22 (22U, 22V, 22W) Segment coil 23 Yoke 24 Teeth 32U, 32V, 32W Coil end end 42 Neutral wire bus bar 42U, 42V, 42W Coil end end 44 Temperature sensor 50 Temperature Sensor Connector 51 Harness Connector 52 Harness Wire 53 Case Terminal Block 54 Motor Case 55 Protective Cap 55a Hole 56 Projection

Claims (1)

A connection structure between a temperature sensor of a stator of a rotating electrical machine and an external terminal,
The stator is connected to each of the three-phase coils at a position of a stator body including a stator core, a three-phase coil wound around the stator core, and a coil end projecting axially outward from the stator core. And a sex line bus bar,
The temperature sensor is fixedly disposed on the neutral wire bus bar, and a temperature sensor connector is disposed on the surface of the neutral wire bus bar,
A harness wire is attached to the external terminal, a harness connector is attached to an end of the harness wire opposite to the external terminal, and the harness connector is configured to be fitted with the temperature sensor connector. , Connection structure of stator temperature sensor and external terminal.

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