JP4294446B2 - motor - Google Patents

Description

The present invention relates to a motor with a built-in capacitor.

  Some motors include a driving capacitor. Some motors have external capacitors, but many motors have built-in capacitors. In a motor with a built-in capacitor, a case type capacitor in which a capacitor element is inserted into a resin case and hardened with a sealing resin, or a dip type capacitor in which the outer periphery of the capacitor element is covered with a thermosetting resin is attached to the terminal block provided in the motor. The capacitor element mounted on the terminal block is fixed to the terminal block with a sealing resin. In addition, there exists a technique disclosed by patent document 1 as this kind of prior art.

Japanese Patent Laid-Open No. 2001-61258

  In a motor with a built-in capacitor, since the capacitor is built in a limited space in the motor, it is necessary to make the capacitor thinner or smaller. In order to make a capacitor thinner or smaller, a method of reducing the size of the capacitor exterior as much as possible is often employed. When the exterior of case type capacitors and dip type capacitors conventionally used is thinned or miniaturized, various problems such as a decrease in moisture resistance, deterioration of formability of the exterior, and insulation failure occur.

  When a capacitor is built in a motor that is expected to be used in a bad environment such as high temperature and high humidity, the problem is that the life of the motor itself is shortened due to deterioration of the capacitor. For this reason, it is a common practice to increase the size of the exterior resin in order to make the capacitor resistant to the environment. However, when the dimensions of the exterior resin are increased, the overall dimensions of the capacitor are also increased, and a new space for incorporating the capacitor is required. When trying to make a capacitor that is environmentally friendly without increasing the external dimensions of the capacitor, it may be possible to reduce the size of the capacitor element and turn the reduced size to the size of the exterior resin. It will decrease.

In order to solve the above-described problems, the present invention focuses on a laminate material having a high barrier property against moisture and the like, and the object is to incorporate a small capacitor having high moisture resistance and insulation. the is to obtain a motor, is to obtain a motor with a built-in embedded cormorants Turkey capacitor in a narrow space, is to obtain a motor with a built-in capacitor life.

The present invention in order to solve the above problems, wraps capacitor in laminate-material, between the motor driving capacitor was sealed while Teishutsu the terminal portion to the outside, the motor shell and the stator coil outer periphery Use the built- in means.

By adopting the above-mentioned means, it is possible to obtain a small and long-life motor that is environmentally friendly .

The capacitor built in the motor of the present invention is a capacitor in which a capacitor substrate or a capacitor element itself is wrapped with a laminate material made by laminating a resin material or a metal material, and the terminal portion is sealed to the outside. . The capacitor element referred to here is in a bare state in which an exterior such as a thermosetting resin is not applied. The capacitor element is made by winding two polypropylene films deposited with aluminum metal having a margin which is an undeposited portion. The wound element is sandwiched between two heated arc-shaped molds and formed into a circular arc shape by pressing, and zinc alloy metallicons are respectively applied to electrodes at both ends thereof. Capacitor terminals are attached to the metallicons of both electrodes of the element formed in the arc shape to form a capacitor element. The capacitor element is provided with an exterior that follows an arc shape by a thermosetting resin or the like to form a capacitor base.

  This capacitor is a thin laminate material obtained by laminating the above-described capacitor element or capacitor substrate with a resin material or a metal material, and the capacitor terminal portion is enclosed and sealed in a state where the capacitor terminal portion is exposed to the outside. A seal portion on the outer periphery of the laminate material is sandwiched between arc bases together with the base portion of the capacitor terminal, and is pressed while being heated and sealed by heat fusion.

  This arc-shaped capacitor is mounted in an empty space between the motor outer shell and the outer periphery of the coil to constitute a motor with a built-in capacitor. Capacitors are wrapped in a circular arc shape with a thin and high barrier laminate material, and the capacitor base or capacitor element is sealed and formed into a circular arc shape. Therefore, high moisture resistance and insulation can be achieved without reducing the capacitor capacity. It becomes a small capacitor with long life and long life. Then, by incorporating it in a narrow space such as a circular arc space between the motor outer shell and the outer periphery of the coil, a motor with a built-in capacitor having a small size and a long service life is obtained.

Embodiment 1 FIG.
1 is a cross-sectional view showing a motor with a built-in capacitor according to the present embodiment, FIG. 2 is a plan view showing the inside from the same axial view, and FIG. 3 is an enlarged cross-sectional view showing the configuration of the capacitor. 4 is a perspective view showing the capacitor, and FIG. 5 is a perspective view showing the capacitor terminal alone. This motor with a built-in capacitor is a single-phase induction motor, and an annular terminal on which an electric element is mounted, with a terminal wire of a coil 2 wound around a tooth 1 of a stator core arranged in a radial pattern being wound around a pin terminal 3 The base 4 is provided through the pin terminal 3, and has a stator structure in which the lead wire or power supply lead wire of the electric element and the pin terminal 3 are connected on the terminal base 4. At the center of the stator core that forms a plurality of slots in the circumferential direction, the rotating shaft 5 is supported at both ends by two bearings attached to the motor outer shell 6 to accommodate the rotor 7. The motor outer shell 6 is configured by a frame 8 and a bracket 9 being flange-coupled, and a stator is fixed and the stator and the rotor 7 are included. Two driving capacitors 10 are built in an arc space that is an empty space between the bracket 9 of the motor outer shell 6 and the outer periphery of the coil 2, and the capacitor terminal 11 and the pin terminal 3 are soldered on the terminal block 4 by soldering. It is connected.

  The capacitor 10 is one in which a capacitor base 13 or capacitor element 14 itself is wrapped with a laminate material 12 made by laminating a resin material or a metal material, and the capacitor terminal 11 portion is sealed and exposed to the outside. Here, the capacitor element 14 is in a bare state with no exterior such as a thermosetting resin. The capacitor element 14 is a film capacitor formed by winding two polypropylene films deposited with aluminum metal having a margin which is an undeposited portion. The wound element is sandwiched between two arc-shaped molds heated to about 100 ° C., formed into an arc shape by pressing, and a metal alloy 15 of zinc alloy is applied to the electrodes at both ends thereof. (See FIG. 3). Capacitor terminals 11 are attached to the metallicons 15 of both electrodes of the arc-shaped element by resistance welding to form capacitor elements 14. The capacitor element 14 is provided with an exterior that follows a circular arc shape made of a thermosetting resin or the like to form a capacitor base 13.

  This capacitor 10 wraps the capacitor element 14 or the capacitor substrate 13 described above with a thin laminate material 12 made by laminating a resin material or a metal material in a state where the capacitor terminal 11 portion is exposed to the outside, and the inside. The seal part 16 is pressurized while applying a heat of about 200 ° C. while being evacuated and sealed by heat fusion. Further, by evacuating the inside, a deaerated package form is obtained, expansion / contraction due to thermal shock is reduced, and the reliability of the seal portion 16 is increased.

  The laminate material 12 has a thickness of about 500 μm formed into a circular arc shape as a metal material on a polyethylene terephthalate film 17 and a polypropylene film 18 having a thickness of about 50 μm as a resin material in order to enhance the moldability such as moisture barrier property and arc shape. Aluminum 19 is laminated, and a polypropylene film 18 is further laminated thereon. Further, in order to ensure the airtightness of the heat-sealed seal portion 16, the capacitor terminal 11 at the portion to be heat-sealed as shown in FIG. 5 is formed into a plate shape having a thickness of about 0.3 mm. .

  An attempt was made to mount a case-type capacitor in which a conventional film capacitor element was formed into a flat shape, housed in a resin case and sealed with epoxy resin, between the bracket 9 of the motor outer shell 6 and the outer periphery of the coil 2. In this case, the resin case has a thin and deep structure, which not only makes it difficult to mold, but also makes the sealing resin that barriers moisture very thin and difficult to use in adverse environments. Even if the moldable dimensions can be secured in the resin case, the dimensions allowed for the capacitor element 14 are greatly reduced, and the target capacitor capacity cannot be secured. In the capacitor 10 according to the present embodiment using the laminate 12 having a higher moisture barrier property and higher insulation than the sealing resin for the exterior, the exterior dimensions are significantly reduced, and the capacitor is contained in a limited space. be able to. And since the dimension of the capacitor | condenser element 14 can be taken large, it can ensure a target capacitor | condenser capacity | capacitance, without enlarging a motor, it can be used in a bad environment, and a motor lifetime is also extended. As shown in FIG. 1 and FIG. 2, when a plurality of capacitors 10 are mounted and connected in parallel, the capacitor capacity can be increased, and when they are connected in series, the withstand voltage of the capacitor 10 is increased. Can do.

Embodiment 2. FIG.
6 is a cross-sectional view showing a motor with a built-in capacitor according to the present embodiment, FIG. 7 is a plan view showing the inside from the same axial view, and FIG. 8 is an enlarged cross-sectional view showing the configuration of the capacitor. 9 is a perspective view showing the capacitor, and FIG. 10 is an enlarged cross-sectional view showing the configuration of another capacitor. This embodiment is also basically the same as the first embodiment. Therefore, the same reference numerals as those in the first embodiment are used for the same parts as those in the first embodiment, and description thereof will be omitted.

  In the motor with a built-in capacitor according to the present embodiment, a capacitor 10 is mounted on an annular terminal block 4. The capacitor 10 is one in which a capacitor base 13 or capacitor element 14 itself is wrapped with a laminate material 12 made by laminating a resin material or a metal material, and the capacitor terminal 11 portion is sealed and exposed to the outside. Here, the capacitor element 14 is in a bare state with no exterior such as a thermosetting resin. The capacitor element 14 is a film capacitor formed by winding two polypropylene films deposited with aluminum metal having a margin which is an undeposited portion. The wound element is sandwiched between two arc-shaped molds heated to about 100 ° C., formed into a flat shape by pressing, and zinc alloy metallicon 15 is applied to the electrodes at both ends. . Capacitor terminals 11 are attached to the metallicons 15 of both electrodes of the flat element by resistance welding, respectively, and an epoxy resin 20 such as liquid or powder is applied to the outer periphery of the capacitor element 14 and thermoset at about 100 ° C. Thus, the capacitor base 13 is configured. Such a capacitor is called a dip capacitor.

  In this capacitor 10, a capacitor base 13 is wrapped with a thin laminate material 12 made by laminating a resin material or a metal material, and the sealing terminal 16 is evacuated while the capacitor terminal 11 is exposed to the outside. It is pressurized while applying heat of about 200 ° C. and sealed by heat fusion. The laminate material 12 is formed by laminating a polyethylene terephthalate film 17 having a thickness of about 50 μm as a resin material and an aluminum 19 having a thickness of about 12 μm as a metal material on the polypropylene film 18 in order to improve moisture barrier properties. It has a multilayer structure in which 18 are laminated.

  When a conventional dip type capacitor is mounted on a motor, the dip type capacitor generally has a low barrier property against moisture and a long life of the motor cannot be expected. However, in the capacitor 10 of this embodiment in which the dip type capacitor is wrapped with a laminate material 12, It has a high barrier property against moisture and can achieve a long life even in adverse environments. Further, the capacitor 10 in which the dip type capacitor is wrapped with the laminate material 12 has a higher moisture barrier property than that in which the capacitor element 14 is wrapped with the laminate material 12, and the size of the seal portion 16 that greatly affects the moisture barrier property is reduced. And further miniaturization can be achieved.

  As in the first embodiment, when a plurality of capacitors 10 are mounted and connected in parallel, the capacitor capacity can be increased, and when they are connected in series, the withstand voltage of the capacitor 10 is increased. However, as shown in FIG. 10, the same effect can be obtained by wrapping a plurality of capacitor bases 13 or capacitor elements 14 together with a laminate 12 and connecting them together.

  This motor with a built-in capacitor can be widely used as a drive motor for a ventilation fan for a bathroom with a lot of moisture and a limited installation space, and a ventilation fan used for ventilation in a barn or a poultry house.

It is sectional drawing of a motor with a built-in capacitor. (Embodiment 1) It is the top view which showed the inside from the axial view of the motor with a built-in capacitor. (Embodiment 1) It is an expanded sectional view showing the composition of a capacitor. (Embodiment 1) It is a perspective view showing a capacitor similarly. (Embodiment 1) It is the perspective view which showed the capacitor terminal. (Embodiment 1) It is sectional drawing of a motor with a built-in capacitor. (Embodiment 2) It is the top view which showed the inside from the axial view of the motor with a built-in capacitor. (Embodiment 2) It is an expanded sectional view showing the composition of a capacitor. (Embodiment 2) It is a perspective view showing a capacitor similarly. (Embodiment 2) It is the expanded sectional view showing the capacitor of other forms. (Embodiment 2)

Explanation of symbols

  2 coil, 4 terminal block, 6 motor outer shell, 10 capacitor, 12 laminate material, 13 capacitor base, 16 seal part.

Claims (3)

Wraps capacitor in laminate-member, a motor, wherein a motor driving capacitor was sealed while Teishutsu the terminal portion to the outside, with built between the motor shell and the stator coil periphery. 2. The motor according to claim 1, wherein the capacitor is formed in an arc shape as a whole . Motor, characterized in that claim 1 or a motor according to claim 2, and sealed in the wrapped-inclusive collectively a plurality of capacitors in the laminate material.

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