JP5929618B2 - Resolver stator - Google Patents

Description

  The present invention relates to a resolver stator, and more particularly to a resolver stator in which wirings connected to terminal pins are fixed with an adhesive.

  In a resolver that detects the rotation angle of a rotating shaft, an end line of a coil winding wound around a magnetic pole of a stator is connected to a terminal pin of a terminal block, and is drawn out as a signal line from the terminal pin. Here, the coil winding is fixed to the terminal block with an adhesive such as varnish so that the coil winding is not disconnected due to external vibration or the like.

  Patent Document 1 describes a holding pin holding portion in a resolver stator structure in which an end line of a winding wound around a magnetic pole of a stator is connected to a terminal pin and is solidified with a varnish. Here, since there is only one varnish reservoir for five terminal pins, the total amount of varnish increases, and it is pointed out that the varnish is insufficient depending on the terminal pins because the varnish also tilts and hardens when tilted from a horizontal state. . Therefore, it is disclosed that a terminal pin wall is provided between the terminal pins of the varnish reservoir.

JP 2009-27841 A

  By fixing the coil winding to the terminal block with an adhesive such as varnish, disconnection due to external vibration can be suppressed. For example, when heat from a rotating body such as a motor is transmitted to the adhesive through a connector portion that holds the terminal pins, the adhesive may be thermally deteriorated to cause cracks. When a crack occurs in the adhesive, the coil winding itself covered with the adhesive may be disconnected.

  An object of the present invention is to provide a resolver stator in which disconnection due to an adhesive is unlikely to occur.

  A resolver stator according to the present invention includes a terminal pin to which an end line of a winding wound around a stator core of a resolver is connected, a connector portion that holds the terminal pin, and at least a terminal pin on a terminal pin holding surface of the connector portion. It is characterized by comprising: an adhesive layer that covers and partially covers and solidifies; and a heat insulating material that is disposed between the terminal pin holding surface of the connector portion and the adhesive layer.

In the resolver stator according to the present invention, the heat insulating material is preferably a heat resistant coating material or a heat resistant resin. In the resolver stator according to the present invention, the adhesive layer is preferably made of varnish.

  With the above configuration, in the resolver stator, since the heat insulating material is disposed between the terminal pin holding surface of the connector portion and the adhesive layer, heat deterioration of the adhesive layer caused by heat from the connector portion being transferred to the adhesive layer. Can be prevented. Thereby, the disconnection resulting from an adhesive material is suppressed.

  In the resolver stator, since the heat insulating material is a heat-resistant coating material or a heat-resistant resin, deterioration of the heat insulating material can be prevented.

In embodiment which concerns on this invention, it is a figure which shows the structure of a resolver stator. It is sectional drawing containing the adhesive material layer in embodiment which concerns on this invention. It is sectional drawing containing the adhesive material layer in a prior art. It is a figure which shows the example of the disconnection which arose in the resolver stator of a prior art.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. The number of magnetic poles of the stator core and the number of terminal pins described below are examples for explanation, and can be appropriately changed according to the specifications of the resolver stator.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted.

  1A and 1B are views showing a resolver stator 10, in which FIG. 1A is a plan view and FIG. 1B is a side view of a connector portion. In FIG. 1, although not a constituent element of the resolver stator 10, a resolver rotor 6 and a rotating shaft 8 attached to the resolver rotor 6 are shown. The resolver stator 10 is used for detecting the rotation angle of the rotary shaft 8 in cooperation with the resolver rotor 6.

  The resolver stator 10 includes a stator core 12, a plurality of salient pole portions 14 provided on the stator core 12, a coil winding 16 wound around each salient pole portion 14, and a connector portion 20 attached to the stator core 12.

  The stator core 12 is an annular magnetic member in which a plurality of salient pole portions 14 are disposed on the inner peripheral side. The stator core 12 is formed by laminating a plurality of electromagnetic steel plates having a predetermined shape.

  The coil winding 16 wound around each of the plurality of salient pole portions 14 includes an excitation coil to which an excitation signal is supplied and a detection coil that detects a signal including information on the rotation angle of the resolver rotor 6 with respect to the resolver stator 10. . The end line 24 is an end portion of the coil winding 16 at the start or end of winding. The coil winding 16 and the end line 24 are composed of a conductor wire 26 and an insulating coating 28 (see FIG. 2).

  The connector portion 20 is an insulating member that holds the plurality of terminal pins 22. The terminal pin 22 is a relay pin that is held by the connector unit 20 and used to connect the coil winding 16 to the external signal line 50. As this connector part 20, what insert-molded the terminal pin 22 with the plastic material which has suitable heat resistance and intensity | strength can be used. An epoxy resin or the like is used as the plastic material. The front side surface of the connector part 20 is a terminal pin holding surface 30.

  The heat insulating material 32 disposed on the terminal pin holding surface 30 of the connector unit 20 forms a heat blocking layer that blocks heat transmitted through the connector unit 20. The heat insulating material 32 is not provided in a portion through which the terminal pin 22 passes in the terminal pin holding surface 30. A heat resistant coating material is used as the heat insulating material. The heat-resistant coating material is a heat-resistant coating material that is also used when applied to stainless steel or the like, and has a high heat resistance temperature of about 650 ° C. As such a heat-resistant coating material, a porous paint containing an inorganic oxide and containing pores as necessary can be used. Further, when the heat resistance requirement is not strict, a heat resistant resin sheet may be used as the heat insulating material. As the heat resistant resin, a polyurethane resin containing pores can be used in addition to a silicone resin. The heat resistant temperature of the heat resistant resin is about 90 ° C to 130 ° C.

  The terminal pin 22 is connected to an end line 24 of the coil winding 16 at one end protruding to the front side of the connector part 20 and connected to an external signal line 50 at the other end protruding to the back side of the connector part 20.

  For the connection between the terminal pin 22 and the end line 24, the insulating coating at the end of the end line 24 is removed, and the exposed conductor wire 26 is wound around the outer periphery of the terminal pin 22 by multiple turns and soldered. You may weld instead of soldering.

  In connection between the terminal pin 22 and the signal line 50, the conductor of the signal line 50 is exposed and soldered to the terminal pin 22. Alternatively, a conductor connecting portion is provided at the tip of the signal line 50 and crimped with the terminal pin 22. Alternatively, a connector terminal is provided on each of the signal line 50 and the terminal pin 22 for connector connection. The plurality of signal lines 50 are bundled by a cable 52.

  The adhesive layer 40 is a layer in which an adhesive is applied and solidified around the terminal pins 22, around the end lines 24, and between the heat insulating material 32 and the end lines 24. Here, the heat insulating material 32 is disposed on the terminal pin holding surface 30 of the connector portion 20, and then the end line 24 is connected to the terminal pin 22, and then the adhesive material is poured. The flowed adhesive covers the terminal pins 22 and the end lines 24, penetrates between the heat insulating material 32 and the end lines 24, and is applied on the heat insulating material 32 including the terminal pins 22 with the adhesive. It becomes a state. Here, the adhesive is solidified to form the adhesive layer 40.

  FIG. 2 is an enlarged view of the terminal pin holding surface 30 and is shown as a partial cross-sectional view. The heat insulating material 32 is arranged on the terminal pin holding surface 30 on the front side of the connector part 20, the end line 24 is arranged thereon, and the adhesive layer 40 is connected to the terminal pin 22 and the end line on the heat insulating material 32. 24 is covered between the end line 24 and the heat insulating material 32. As described with reference to FIG. 1, the adhesive layer 40 is formed between the end line 24 and the heat insulating material 32 after the end line 24 is connected to the terminal pin 22 and then the adhesive is poured and solidified. Layer. As an adhesive constituting the adhesive layer 40, varnish is used.

  Thus, since the heat insulating material 32 is arrange | positioned between the connector part 20 and the adhesive material layer 40, the heat from the connector part 20 is interrupted | blocked by the heat insulating material 32. FIG. In FIG. 2, the heat flow is indicated by white arrows. Since the heat flow is interrupted at the heat insulating material 32, it is possible to prevent heat from being transmitted to the adhesive layer 40 and the adhesive layer 40 from being thermally deteriorated. Thereby, the disconnection resulting from an adhesive material is suppressed.

  In the above, since the end line 24 is arranged on the terminal pin holding surface 30 on the front side of the connector unit 20 and the signal line is arranged on the back side of the connector unit 20, the adhesive layer 40 is connected to the terminal pin 22. The end line 24 is fixed to the terminal pin holding surface 30 via a heat insulating material 32. On the contrary, the signal line 50 can be arranged on the terminal pin holding surface 30 of the connector part 20 and the end line 24 can be arranged on the back side of the connector part 20. In this case, the adhesive layer 40 fixes the signal line 50 connected to the terminal pin 22 to the terminal pin holding surface 30 via the heat insulating material 32. Further, the end line 24 and the signal line 50 can be arranged on the terminal pin holding surface 30 of the connector unit 20 and both can be connected to one end of the terminal pin 22. In this case, the adhesive layer 40 fixes the end line 24 and the signal line 50 connected to the terminal pin 22 to the terminal pin holding surface 30 via the heat insulating material 32. As described above, the adhesive layer 40 is formed by being applied and solidified on the terminal pin holding surface 30 of the connector portion 20 including the terminal pins 22, and the end lines 24 and the signal lines 50 connected to the terminal pins 22. At least one of these is fixed to the terminal pin holding surface 30 via a heat insulating material 32.

  3 and 4 are diagrams for explaining the effect of the above configuration in comparison with the prior art. FIG. 3 is a cross-sectional view corresponding to FIG. In the prior art, the heat insulating material 32 is not provided, and the adhesive layer 40 is directly interposed between the front side of the connector portion 20 and the end line 24. FIG. 3 shows the heat flow with white arrows. Thus, since the heat from the connector part 20 is directly transmitted to the adhesive layer 40, the adhesive layer 40 is likely to be thermally deteriorated.

  FIG. 4 is a diagram illustrating an example in which the end line 25 is disconnected when the connector unit 20 of the related art is used. FIG. 4A is a perspective view showing a state in which the end line 25 is connected to the terminal pin 23 in the connector portion 20. In the connector portion 20 of the prior art, a wall is provided on the periphery of the six terminal pins 23, and the inside of the wall serves as an adhesive reservoir.

  FIGS. 4B to 4D are diagrams showing the disconnection portions 62, 64, 66 generated in the end line 25. It is considered that the disconnection portions 62, 64, and 66 are caused by heat from the connector portion 20 being directly transmitted to the adhesive layer 40 and thermal deterioration of the adhesive layer 40. When the adhesive layer 40 is thermally deteriorated, a crack is generated in the adhesive layer 40 due to external vibration and temperature change, and the end line 25 is also disconnected accordingly.

  According to the configuration of FIG. 1, since the heat insulating material 32 is disposed between the connector portion 20 and the adhesive layer 40, thermal deterioration of the adhesive layer 40 is suppressed by the heat from the connector portion 20. Thereby, generation | occurrence | production of the crack by the heat deterioration of the adhesive material layer 40 can be suppressed, and the disconnection resulting from an adhesive material can be suppressed.

  6 Resolver rotor, 8 Rotating shaft, 10 Resolver stator, 12 Stator core, 14 Salient pole part, 16 Coil winding, 20 Connector part, 22, 23 Terminal pin, 24, 25 End wire, 26 Conductor wire, 28 Insulation coating, 30 , 60 Terminal pin holding surface, 32 heat insulating material, 40 adhesive layer, 50 signal line, 52 cable, 62, 64, 66 disconnected part.

Claims (3)

A terminal pin to which an end line of a winding wound around the stator core of the resolver is connected;
A connector section for holding terminal pins;
An adhesive layer coated and solidified on at least a part of the terminal pins on the terminal pin holding surface of the connector part;
A heat insulating material disposed between the terminal pin holding surface of the connector portion and the adhesive layer;
A resolver stator comprising: The resolver stator according to claim 1,
A resolver stator, wherein the heat insulating material is a heat-resistant coating material or a heat-resistant resin. The resolver stator according to claim 1 or 2,
A resolver stator, wherein the adhesive layer is made of varnish.

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