JP2008178162A - Stator structure - Google Patents

Abstract

An object of the present invention is to provide a stator structure capable of improving the heat dissipation effect.
In the stator structure according to the present invention, a heat radiating plate 25 is disposed outside a first end 2a of a stator coil 2 on a side to which a lead wire 4 is connected, and in the axial direction 22 of a ring-shaped iron core 1. The resin mold material 3 is filled on the outer ends 1a and 1b along the side, and the heat of the stator coil 2 transferred to the resin mold material 3 is transferred to the outer cylinder 20 through the heat radiating plate 25. .
[Selection] Figure 1

Description

  The present invention relates to a stator structure, and in particular, a heat radiating plate is disposed outside a first end portion of a stator coil, and a resin mold material is filled on an outer end side along the axial direction of a ring-shaped iron core. The present invention relates to a novel improvement that improves the heat dissipation effect by transferring the heat of the stator coil that has been transferred to the material to the outer cylinder through the heat dissipation plate.

  As this type of stator structure conventionally used, for example, the structure of a motor disclosed in Patent Documents 1 and 2 can be cited. That is, the conventional stator structure is configured such that heat generated in the stator coil is radiated from the cylindrical motor case through the ring-shaped iron core and is radiated from the cylindrical motor case through the air.

  As another conventional structure, the structure of Patent Document 3 shown in FIG. 2 can be given. That is, what is denoted by reference numeral 1 in FIG. 2 is a ring-shaped iron core, and a stator coil 2 is provided in each slot (not shown) of the ring-shaped iron core 1. An outer cylinder 20 made of a material having good thermal conductivity such as the above is provided.

  In a state where a columnar or hollow jig 21 is inserted in the center of the ring-shaped iron core 1, a resin mold material 3 made of a resin material having good thermal conductivity is filled between the jig 21 and the outer cylinder 20. The one end surface 3 a of the resin molding material 3 is formed on the same surface as the one end 20 a of the outer cylinder 20.

  The other end 20 b of the outer cylinder 20 is formed with a bent portion 23 that is bent and extended toward the axial direction 22 of the annular iron core 1, and the bent portion 23 is formed on the end 2 a of the stator coil 2. It joins and contacts and is formed along the other end surface 3 b of the resin mold material 3.

  When the jig 21 is removed while the resin molding material 3 is solidified, and the completed annular stator 10 is inserted into the cylindrical motor case 11, the outer periphery of the outer cylinder 20 is engaged with the inner surface 11 a of the cylindrical motor case 11. And a motor (not shown) can be completed.

  In the above-described state, the stator coil 2 is mechanically connected to the cylindrical motor case 11 via the resin molding material 3 and the outer cylinder 20, and the heat generated in the stator coil 2 is generated by the resin molding material 3 and the outer cylinder. Heat is transferred to the cylindrical motor case 11 via 20 and radiated to the outside.

US Pat. No. 5,856,714 JP 62-278408 A JP 2005-223987 A

The conventional stator structure as described above has the following problems because it is configured as described above.
That is, in the configurations of Patent Documents 1 and 2 described above, the heat generated in the stator coil is radiated from the cylindrical motor case via the annular iron core, and is radiated from the cylindrical motor case via the stator coil and air. For this reason, the efficiency of heat dissipation is poor, and sufficient power cannot be supplied to the motor, making it difficult to obtain a motor output exceeding the conventional rating.

  Further, in the configuration of the above-mentioned Patent Document 3, the resin mold material is provided outside the stator coil. However, the heat of the stator coil can be radiated from the outer cylinder directly or via the resin mold material. However, it was difficult to obtain a rated motor output as in the above-described structure.

A stator structure according to the present invention includes a ring-shaped iron core having a stator coil, an outer cylinder provided on an outer periphery of the ring-shaped core, and first and second ends of the stator coil positioned along the axial direction of the ring-shaped core. A lead wire connected to the stator coil on the first end side, a heat dissipating plate disposed outside the first end portion, and an outer end side of the annular iron core along the axial direction The heat generated in the stator coil is transferred to the outer cylinder through the resin mold material and the heat radiating plate.
Further, the heat radiating plate is formed of a ring-shaped plate having an L-shaped cross section and is joined to the inner surface of the outer cylinder.
A substrate having an electronic circuit is attached to the heat radiating plate, and the heat radiating plate and the substrate are disposed so as to cover the stator coil.

Since the stator structure according to the present invention is configured as described above, the following effects can be obtained.
That is, a heat sink is disposed outside the first end portion, the resin mold material is filled on the outer end side along the axial direction of the ring-shaped iron core, and the stator has transferred heat to the resin mold material. Since the heat of the coil can be transferred to the outer cylinder through the heat sink, it can be efficiently dissipated to the outside, and a large power exceeding the conventional rating can be applied to the motor, and the efficiency of the motor is improved. Can be made.
Further, since the heat radiating plate has an L-shaped cross section, covers the outside of the stator coil and is joined to the inner surface of the outer cylinder, the heat of the stator coil can be more reliably transferred to the outer cylinder. it can.
In addition, a substrate having an electronic circuit is attached to the heat radiating plate, and the heat radiating plate and the substrate are disposed so as to cover the stator coil, so that the heat of the stator coil and the substrate can be more reliably Heat can be transferred to the outer cylinder.

  The present invention provides a resin mold in which a heat radiating plate is provided outside the first terminal along the axial direction of the stator coil provided on the ring-shaped iron core, and the heat radiating plate is embedded on the outer end side along the axial direction of the ring-shaped iron core. An object of the present invention is to provide a stator structure in which heat generated in the stator coil is transferred to the outer cylinder side through the resin mold material and the heat dissipation material to improve the heat dissipation effect by filling the material.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a stator structure according to an embodiment of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part. In FIG. 1, what is indicated by reference numeral 1 is a ring-shaped iron core having a cylindrical shape as a whole, and a cylindrical outer cylinder 20 formed of aluminum or the like is fitted on the outer periphery of the ring-shaped iron core 1. Yes.

  Each slot (not shown) of the ring-shaped iron core 1 is provided with a ring-shaped stator coil 2, and the first and second ends 2 a and 2 b of the stator coil 2 are in the axial direction of the ring-shaped iron core 1. The first and second outer ends 1a and 1b extending along the axial direction 22 protrude outward from the first and second outer ends 1a and 1b. A lead wire 4 is connected to the stator coil 2 on the first end 2a side.

  A heat radiating plate 25 made of aluminum or the like is disposed outside the first end 2a of the stator coil 2, and the heat radiating plate 25 is formed of a ring-shaped plate having an L-shaped cross section. It is joined to the inner surface 20c.

  Since the heat radiating plate 25 has an L-shaped cross section as described above, the heat radiating plate 25 has a tongue piece 25 a extending in a direction orthogonal to the axial direction 22. A substrate 31 having an L-shaped cross section is fixed by a bolt 32. The substrate 31 is provided with an electronic circuit 33, and the heat radiating plate 25 and the substrate 31 form a concave shape in cross-sectional shape as a whole, and a part of the first end 2a of the stator coil 2 is formed. It is configured to cover.

  Next, a cylindrical or cylindrical jig 21 is inserted and provided in the hollow hole 1A of the annular core 1 configured as described above, and the jig 21 is provided in the annular core 1. By filling the first and second outer ends 1a, 1b with a resin made of epoxy resin or the like in the provided state by potting or the like, the gap where the stator coil 2 and the heat radiating plate 25 are located is a resin molding material. Filled with three.

  Accordingly, the end portions 2a and 2b of the stator coil 2 are connected to the outer cylinder 20 via the resin mold material 3 and the heat radiating plate 25, and the heat of the stator coil 2 is applied to the resin mold material 3 and the heat radiating plate 25. The heat is transferred to the outer cylinder 20 through the heat exchanger 20 so that heat can be efficiently radiated. As described above, the outer cylinder 20 is provided as a product on the user side, and the user side uses the outer cylinder 20 as a motor in a state where the outer cylinder 20 is inserted into the cylindrical motor case 11.

It is sectional drawing which shows the stator structure by embodiment of this invention. It is sectional drawing which shows the conventional stator structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Ring-shaped iron core, 1a, 1b 1st and 2nd outer end, 2 Stator coil, 2a, 2b 1st and 2nd end part, 3 Resin molding material, 4 Lead wire, 20 Outer cylinder, 25 Heat sink, 31 Substrate, 33 Electronic circuit.

Claims (3)

An annular iron core (1) having a stator coil (2);
An outer cylinder (20) provided on the outer periphery of the annular iron core (1);
First and second ends (2a, 2b) of the stator coil (2) located along the axial direction (22) of the annular iron core (1);
A lead wire (4) connected to the stator coil (2) on the first end (2a) side;
A heat sink (25) disposed outside the first end (2a);
A resin mold material (3) filled on the outer end (1a, 1b) side along the axial direction (22) of the ring-shaped iron core (1),
The stator structure characterized in that heat generated in the stator coil (2) is transferred to the outer cylinder (20) through the resin mold material (3) and the heat radiating plate (25).   The stator structure according to claim 1, wherein the heat radiating plate (25) is formed of a ring-shaped plate having an L-shaped cross section and joined to an inner surface (20c) of the outer cylinder (20). A substrate (31) having an electronic circuit (33) is attached to the heat sink (25),
The stator structure according to claim 1 or 2, wherein the heat radiating plate (25) and the substrate (31) are disposed so as to cover the stator coil (2).

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