TW202107800A - Coreless motor and power generator - Google Patents

Abstract

Provided is a coreless motor which has a simple structure and with which overheating of a coil during motor operation can be suppressed, and excess current can be supplied to the coil to cause an electric motor to output at high rotation. The coreless motor comprises: a rotation center shaft that extends in the axial direction at the center of a sealed housing; a cylindrical coil that is disposed concentrically with respect to the rotation center shaft in the housing, an end surface on one side of the cylindrical coil being supported by a stator and extending in the direction in which the rotation center shaft extends; a rotor that is disposed concentrically with respect to the rotation center shaft in the housing, and that rotates in the circumferential direction of the rotation center shaft; and a liquid refrigerant that is accommodated in the housing, that flows inside the housing due to the rotation of the rotor, and that contacts the cylindrical coil.

Description

Coreless motors and generators

For an electric motor, the use limit that is guaranteed relative to the temperature rise of the coils, magnets, etc. constituting the electric motor during normal operation, is usually rated and indicated by the manufacturer. Rated (rating) is an individual standard guaranteed by the manufacturer when the electric motor is operated at the rated torque or rated output at a specific voltage. Generally speaking, it is recorded in the product catalog or specification sheet. For example, while the electric motor exhibits good characteristics at a specific voltage, the maximum output generated is expressed as the rated output, and the rotation speed when operating at the rated output is expressed as the rated rotation speed. The torque at this time It is expressed as the rated torque, and the current at this time is expressed as the rated current. As an electric motor provided to the market by the applicant in this case, there is an electric motor having the following structure, which includes a cylindrical coil arranged in a concentric circle with respect to the rotation center axis in a housing, and one end surface is supported by a stator , And extend in the "extending direction of the central axis of rotation"; and the rotor is arranged concentrically in the housing relative to the central axis of rotation, and rotates in the circumferential direction of the central axis of rotation. The coreless motor is rated on the condition that the temperature of the cylindrical coil does not exceed the allowable upper limit temperature of 130°C. The rated torque T ₀ =0.28Nm, the rated current I ₀ =9.7Arms, and the rated rotation speed n ₀ =6537rpm , Rated output P ₀ =191.67W. When using this coreless motor and driving it under conditions exceeding the rating and reviewing it, it exceeded the allowable upper limit temperature of the cylindrical coil of 130°C in just tens of seconds after the start of the drive. The worst situation that can be easily imagined based on this situation is that once it is driven under conditions exceeding the rating, the cylindrical coil will burn and be destroyed. In addition, even if the extent of damage is not achieved, from a performance point of view, it is impossible to expect the ironless motor to operate normally for a long time. In this way, even if the electric motor instantaneously exceeds the rated current when starting, etc., it is usually not assumed to be "continuously running at an exceeding rated state". Once the electric motor is continuously operated in an overloaded state, that is, above the rated state, the coil of the electric motor will generate more than expected heat due to the current. In view of this, the inventor of this case proposes a method: by equipping the cooling mechanism in the "coreless motor with cylindrical coil", the performance of the electric motor is prevented from degrading due to the heating of the cylindrical coil and the heating of the magnet. , A technology that can operate with a load exceeding the rated load (Patent Documents 1 and 2). In addition, traditionally, various proposals have been proposed for adding a cooling function to the electric motor (for example, Patent Documents 3, 4, 5, and 6). [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent No. 5943333 [Patent Document 2] Japanese Patent No. 6399721 [Patent Document 3] Japanese Patent Laid-Open No. 4-359653 [Patent Document 4] Japan Japanese Patent Application Publication No. 2018-157645 [Patent Document 5] Japanese Patent Application Publication No. 2014-90553 [Patent Document 6] US Patent Publication No. 2014/0175917

[Problem to be solved by invention] The object of the present invention is to provide a coreless motor and generator capable of high output by suppressing overheating of the coil during operation with a simple structure. The object of the present invention is to suppress the overheating of the coil during operation and provide a coreless motor and generator with high output. In particular, the structure of the coreless motor and generator is provided with: a central axis of rotation; and a cylindrical coil, as opposed to The rotation center axis is arranged concentrically and extends in the direction of extension of the rotation center axis; and the rotor is arranged concentrically with respect to the rotation center axis, and the cylindrical coil is sandwiched in the radial direction. A cylindrical inner yoke and an outer yoke are formed between each other, and a magnet is provided on the outer side of the inner yoke or the inner side of the outer yoke, and is located on the circumference of the rotation center axis Direction rotation. [Means to Solve the Problem] The coreless motor and generator of the present invention have a structure including: a central axis of rotation extending in the axial direction at the center of a closed casing; and a cylindrical coil arranged concentrically with respect to the central axis of rotation in the casing A circular shape, one end surface of which is supported by the stator and extends toward the extension direction of the rotation center axis; and the rotor, in the housing, is arranged in a concentric circle with respect to the rotation center axis, and is divided in the radial direction. The cylindrical coil is formed by a cylindrical inner flange and a cylindrical outer flange sandwiched between each other, and a magnet is provided on the outer surface of the inner flange or the inner surface of the outer flange, and the center of rotation The shaft rotates in the circumferential direction. The housing contains a liquid refrigerant and has a structure in which, in a static state, the liquid surface of the liquid refrigerant extending in the axial direction contacts the outer peripheral surface of the outer collar. Then, by the rotation of the rotor, the liquid refrigerant flows in the housing and contacts the cylindrical coil. The rotation of the rotor causes the liquid refrigerant to flow into the doughnut-shaped space formed between the inner flange and the outer flange sandwiching the cylindrical coil in the radial direction, and The liquid refrigerant is brought into contact with the cylindrical coil that generates heat, and the heat is taken away from the cylindrical coil. The liquid refrigerant flowing in the shell transfers the carried heat to the shell. The surface area is larger than that of the cylindrical coil. The entire outer peripheral surface of the housing dissipates heat. Thereby, the cylindrical coil that generates heat due to the operation of rotating the rotor is cooled by the liquid refrigerant, and the heat taken away from the heated cylindrical coil flows through the housing by the liquid refrigerant Inside, and conduct heat to the aforementioned housing, and dissipate heat from the entire outer surface of the housing. Thereby, it is possible to suppress the overheating of the coil during the operation of the coreless motor, and to supply excess current to the coil, so that the coreless motor has a high rotational output. In addition, the rotor that rotates at a high speed in the housing allows the liquid refrigerant to flow at a high speed in the housing, thereby making the liquid refrigerant finer and finer. According to this, the liquid refrigerant in a sprayed state flows in the housing at a high speed. In addition, a part of the flowing liquid refrigerant is vaporized by contacting the heating coil. According to the above description, the environment inside the casing is formed into a gas-liquid mixed state. As the environment inside the housing becomes a gas-liquid mixed state where "there is a liquid refrigerant in a sprayed state", the heat conduction from the "coil that generates heat due to energization" to the housing is improved. As a result, the temperature of the housing is efficiently raised to a temperature "the same level as that of the heating coil", and a structure in which heat is dissipated from the entire outer surface of the housing is formed. Thereby, it is possible to suppress the overheating of the coil during the operation of the coreless motor, and to supply excess current to the coil, so that the coreless motor has a high rotational output. [1] A coreless motor with: The central axis of rotation, which extends in the direction of the axis in the center of the closed housing; and Cylindrical coils, in the housing, are arranged concentrically with respect to the central axis of rotation, one end surface of which is supported by the stator and extends in the direction of extension of the central axis of rotation; and The rotor, in the housing, is arranged concentrically with respect to the central axis of rotation, rotates in the circumferential direction of the central axis of rotation, and is surrounded by cylinders that sandwich the cylindrical coils in the radial direction. A shaped inner flange and a cylindrical outer flange are formed, and a magnet is provided on the outer surface of the inner flange or the inner surface of the outer flange; and The liquid refrigerant is contained in the housing, and in a static state, the liquid surface extending in the axial direction contacts the outer peripheral surface of the outer flange, Due to the rotation of the rotor, the liquid refrigerant flows in the housing and contacts the cylindrical coil. [2] The coreless motor described in [1], wherein the outer flange is provided with a hole that penetrates the outer flange in a radial direction. [3] A coreless motor with: The central axis of rotation, which extends in the direction of the axis in the center of the closed casing; and Cylindrical coils, in the housing, are arranged concentrically with respect to the central axis of rotation, one end surface of which is supported by the stator and extends in the direction of extension of the central axis of rotation; and The rotor, in the housing, is arranged concentrically with respect to the central axis of rotation, rotates in the circumferential direction of the central axis of rotation, and is surrounded by cylinders that sandwich the cylindrical coils in the radial direction. A shaped inner flange and a cylindrical outer flange are formed, and a magnet is provided on the outer surface of the inner flange or the inner surface of the outer flange; and The reducer is equipped in the housing and is formed by a planetary gear mechanism that transmits the rotational movement of the rotor with the rotational center axis as the center into the rotational movement of the rotational movement output part; and The liquid refrigerant is contained in the housing, and in a static state, the liquid surface extending in the axial direction contacts the outer peripheral surface of the outer flange, Due to the rotation of the rotor, the liquid refrigerant flows in the housing and contacts the cylindrical coil. [4] The coreless motor described in [3], wherein the reduction gear is housed in a "cylindrical gear box extending in the extending direction of the rotation center axis", and the gear box is provided with a gear box penetrating in the radial direction Of the hole. [5] The coreless motor described in [3] or [4], wherein the liquid surface of the liquid refrigerant extending in the axial direction in the stationary state contacts the outermost periphery in the radial direction of the planetary gear mechanism. [6] A generator provided with the structure of the coreless motor described in any one of [1] to [5] above. [Effects of the invention] According to the present invention, it is possible to provide a coreless motor capable of suppressing overheating of the coil during motor operation and supplying excess current to the coil with a simple structure to enable high rotational output of the electric motor. In addition, a generator of this configuration can be provided.

根據該試驗結果，可確認得知：將液狀冷媒收容於密閉的無鐵心馬達的外殼內，利用轉子的轉動使液狀冷媒流動於外殼內，使液狀冷媒接觸發熱的圓筒狀線圈，促使部分的液狀冷媒氣化，而使外殼內形成氣液混合狀態，藉此，提升外殼內的熱傳導效率，外殼的溫度隨著圓筒狀線圈的溫度上升而上升，藉此達成有效率地散熱。 (發電機的實施形態) 以上，雖然說明了無鐵心馬達的實施形態，但本發明並不侷限於上述的實施形態。馬達的構造，基本上與發電機的構造相同。在無鐵心馬達的上述結構、構造中，利用轉子所輸入的轉動力而轉動，並據以執行發電的裝置，為發電機。因此，在本發明中，可以形成具有上述結構、構造之發電機的實施形態。 以上雖然說明了本發明的實施形態，但是本發明並不侷限於上述的實施形態，在不脫離申請專利範圍所記載之範圍的前提下，可以有各種的設計變更。(Embodiment 1) The coreless motor 1 shown in FIG. 1 is provided with: a sealed casing 4; and a rotation center shaft 5 extending in the axial direction (left-right direction in FIG. 1) at the center of the casing 4. In the embodiment shown in FIG. 1, the rotation center shaft 5 is rotatably supported by the housing 4, and the rotation center shaft 5 serves as the rotation output part of the coreless motor 1. In the illustrated embodiment, the sealed casing 4 is composed of a cylindrical casing 2 and a disk-shaped cover 3 that closes the cylindrical casing 2 at the right end side opening in FIG. 1. The cylindrical case 2 includes a disc-shaped portion 2b and a cylindrical portion 2a. The right end in FIG. 1 of the cylindrical portion 2a constituting the cylindrical casing 2 is pressure-contacted by the disc-shaped lid portion 3 via packings 7a and 7b. The rotation center shaft 5 is rotatably supported by the housing 4 through bearings 6a, 6b, 6c, and 6d with seals on the inner side of the cover 3 in the radial direction. The bearing 6a having a seal, etc., for example, a bearing having an oil seal may be used. Hereinafter, in the specification of this case, "bearings 6a, 6b, 6c, 6d with seals" may be referred to simply as "bearings 6a, 6b, 6c, 6d". In the illustrated embodiment, the sealing of the housing 4 is achieved by the presence of the gaskets 7a, 7b; the bearings 6a, 6b, 6c, and 6d. The coreless motor 1 includes a cylindrical coil 8 and a rotor 12 inside a housing 4. The cylindrical coil 8 is arranged concentrically with respect to the rotation center axis 5, and one end surface (in the embodiment of FIG. 1, the right end surface) is supported by the "stator supported by the housing 4" and faces The extension direction of the rotation center shaft 5 extends. The cylindrical coil 8 is a coreless coil that can be energized. In the embodiment shown in the figure, the cylindrical shape is formed by a laminate structure of conductive metal flakes, and the laminate structure of the conductive metal flakes overlaps the insulating layer with a plurality of separated linear parts. It is formed in the "extending direction of the central axis of rotation 5" in FIG. 1, that is, the longitudinal direction. The thickness in the radial direction is, for example, 5 mm or less, and has specific rigidity. Such a cylindrical coil is manufactured, for example, according to the manufacturing method described in Japanese Patent No. 3704044. The rotor 12 is arranged concentrically with respect to the rotation center shaft 5 and is supported by the rotation center shaft 5 on the center side in the radial direction. In the embodiment shown in FIG. 1, the rotor 12 is composed of an inner collar 9 and an outer collar 10 sandwiching a cylindrical coil 8 in the radial direction. The outer flange 10 is provided with a magnet 11 on the inner surface in the radial direction facing the inner flange 9. According to this, between the outer flange 10 and the inner flange 9 of the "radial inner side covered by the magnet 11" sandwiching the cylindrical coil 8 between each other, a magnetic field with a ring-shaped cross section is formed, and it is formed Magnetic circuit. Although in the embodiment shown in FIG. 1, the magnet 11 is provided on the inner surface of the outer flange 10 in the radial direction, it may be replaced by a configuration in which the "magnet 11 is provided on the outer surface of the inner flange 9 in the radial direction". In the sealed casing 4, a liquid refrigerant 20 is housed. In the embodiment shown in FIG. 1, the disc-shaped cover 3 of the housing 4 has an opening 14 sealed by a plug 15. After the plug 15 is removed from the opening 14 and a specified amount of liquid refrigerant 20 is injected into the casing 4, the opening 14 is closed again with the plug 15 to maintain the sealed state of the casing 4. As the liquid refrigerant 20, oil used for lubrication of mechanical action parts, antifreeze solution, water, etc. can be used. In the coreless motor 1 shown in FIG. 1, in a state where "a magnetic field with a toroidal cross section is formed between the inner flange 9 and the outer flange 10", by supplying a specific current to the cylindrical coil 8, the rotor 12 rotates in the circumferential direction of the rotation center shaft 5. The radially inner side of the inner collar 9 constituting the rotor 12 is supported by the rotation center shaft 5, and accordingly, the rotation center shaft 5 also rotates in the circumferential direction indicated by the arrow 21 in FIG. 1. As shown in Figs. 1 and 11(a), the liquid refrigerant 20 contained in the housing 4 has a structure in which the liquid surface extending in the axial direction contacts the outer peripheral surface of the outer flange 10 in a static state. Once the rotor 12 rotates in the circumferential direction of the rotation center shaft 5, the liquid refrigerant 20 contacting the outer peripheral surface of the outer flange 10 will be drawn by the outer peripheral surface of the outer flange 10 and flow in the "circumferential direction of the outer flange 10". The outer flange 10 rises in the circumferential direction on the outer peripheral surface. After that, the liquid refrigerant 4 "in the housing 4, which has risen in the circumferential direction on the outer peripheral surface of the outer flange 10", by its own weight, falls along the outer peripheral surface of the outer flange 10 to "Figure 1 The bottom side of the housing 4 in the horizontal state shown in the figure". During the repetitive flow of the liquid refrigerant 20 by the rotational movement of the rotor 12, part of the liquid refrigerant 20 flows from the left and right ends in FIG. 1 to form a "in the radial direction, the cylindrical coil 8 is a ring-shaped cross-sectional space between the inner collar 9 and the outer collar 10" sandwiched between each other. The liquid refrigerant 20 that has flowed in touches the "cylindrical coil 8 whose temperature starts to rise due to operation". In this way, when a part of the liquid refrigerant 20 contacts the cylindrical coil 8 that generates heat, the cylindrical coil 8 is cooled. In addition, the liquid refrigerant 20 that takes away heat from the heated cylindrical coil 8 flows in the housing 4 and transmits the heat to the housing 4 through the liquid refrigerant 20, so that the temperature of the housing 4 rises, and the housing 4 Perform heat dissipation on the entire outer surface of the device. Thereby, it is possible to suppress overheating of the coil during the operation of the coreless motor, supply excess current to the coil, and enable high rotational output of the coreless motor 1. Its structure is provided with a central axis of rotation 5 that "extends in the axial direction at the center of the closed housing 4", and a central axis of rotation 5 "in the housing 4, which is fixedly arranged in a concentric circle with respect to the central axis of rotation 5, and faces the central axis of rotation 5. A cylindrical coil 8 extending in the extending direction; and a cylindrical coil 9 arranged concentrically with respect to the central axis of rotation 5 and sandwiched between the cylindrical coil 8 in the radial direction. The coreless motor of the rotor 12 is formed with the outer flange 10, and the outer surface of the inner flange 9 or the inner surface of the outer flange 10 is equipped with a magnet 11 and rotates in the circumferential direction of the rotation center shaft 5. The coreless motor has the following structure , While suppressing the overheating of the coil when the motor is operating: the housing 4 contains the liquid refrigerant 20. In the static state shown in FIG. 1, the liquid surface of the liquid refrigerant 20 extending in the axial direction contacts the outer flange 10 With the rotation of the rotor 12 on the outer peripheral surface, the liquid refrigerant 20 flows in the housing 4 and contacts the cylindrical coil 8. Among the conventional cooling mechanisms for electric motors proposed in Patent Documents 3 to 6, the above-mentioned mechanism is not proposed, that is, the rotation of the rotor 12 causes the liquid refrigerant to flow in and form "in the radial direction, The cylindrical coil 8 is sandwiched between the inner flange 9 and the outer flange 10" in the ring-shaped cross-sectional space, and the liquid refrigerant is brought into contact with the cylindrical coil 8 that generates heat, and the cylindrical coil 8 The coil 8 takes away heat. In addition, in this embodiment, the liquid refrigerant 20 contained in the sealed casing 4, as described above, is reduced by the rotor 12 in the circumferential direction of the rotation center shaft 5 at a high speed, so as to be miniaturized and micronized. , And then become a spray state, and flow in the housing 4 at high speed. The liquid refrigerant 20 in the spray state flowing at high speed in the housing 4 enters: the gap of the ring-shaped cross section formed between the inner side of the magnet 11 in the radial direction and the outer side of the cylindrical coil 8 in the radial direction; and the gap formed in the inner flange 9 The gap of the ring-shaped cross-section between the outer side in the radial direction and the inner side in the radial direction of the cylindrical coil 8. The cylindrical coil 8 supplied with electric current generates heat, and a part of the liquid refrigerant 20 in the sprayed state that has contacted the inner and outer surfaces of the cylindrical coil 8 in the radial direction is generated by the high-temperature cylindrical coil 8 The formation of gasification. As a result, the internal space of the housing 4 is in a gas-liquid mixed state in which the "liquid refrigerant that is refined and particulated by the high-speed rotating rotor 12, and then becomes a spray state" exists. In the closed environment of this gas-liquid mixed state, the rotor 12 rotates at a high speed. With the high-speed rotating rotor 12, the gas-liquid mixture in the spray state flows in the airtight housing 4, thereby, compared with the case when the housing 4 is only in a gaseous state, it can be improved from the "cylindrical shape that generates heat due to energization" The heat conduction of the coil 8" toward the housing 4. According to this, the energization of the cylindrical coil 8 is started, and the rotor 12 starts to rotate. Once the temperature of the cylindrical coil 8 starts to rise, the temperature of the disc-shaped portion 2b and the cylindrical portion 2a constituting the housing 4 also starts as described above. , The temperature of the disc-shaped portion 2b and the cylindrical portion 2a will gradually approach the temperature of the cylindrical coil 8. In this way, heat dissipation is performed by a large heat dissipation area called "the outer surface of the disc-shaped portion 2b and the cylindrical portion 2a". As a result, it is possible to suppress the overheating of the cylindrical coil 8 during the operation of the ironless motor 1 and to supply excess current to the cylindrical coil 8, thereby enabling the ironless motor 1 to have a high rotational output. In the embodiment illustrated in FIG. 1, the liquid refrigerant 20 contained in the sealed casing 4 is contained in the casing 4 in a state in which it contacts a part of the rotor 12. Therefore, once the rotor 12 rotates, it will be directly formed: the liquid refrigerant 20 starts to flow in the housing 4. Although not shown in the drawing, the liquid refrigerant 20 contained in the housing 4 may be in a form that does not contact a part of the rotor 12. Even in this case, as the rotor 12 rotates at a high speed in the housing 4, a high-speed airflow is generated in the housing 4 in the direction of rotation of the rotor 12, and this airflow causes the liquid refrigerant 20 to start flowing in the housing 4. In the embodiment illustrated in FIG. 1, the outer collar 8 is provided with holes 13a, 13b, 13c, and 13d that penetrate the outer collar 8 in the radial direction. Once the rotor 12 rotates, the liquid refrigerant 20 can pass through the holes 13 a, 13 b, 13 c, and 13 d to flow toward the inner side of the outer flange 10 in the radial direction. Therefore, it is possible to efficiently contact the cylindrical coil 8 located on the inner side of the outer flange 10 in the radial direction, to efficiently remove heat from the heated cylindrical coil 8, and flow to contact the inner wall surface of the housing 4. The heat is conducted to the housing 4 efficiently. In addition, as the rotor 12 rotates at a high speed in the circumferential direction of the rotation center shaft 5, the flow state of the liquid refrigerant 20 in the casing 4 is more activated, and the gas-liquid mixing state in the internal space of the casing 4 can be more efficiently generated. As described above, regardless of whether the liquid refrigerant 20 contained in the sealed housing 4 contacts a part of the rotor 12 or does not make contact, the high-speed rotation of the rotor 12 can make the internal space of the housing 4 into a gas-liquid mixed state. By providing the rotor 12 with the "hole 13a penetrating in the radial direction" as described above, the gas-gas mixture state can be more efficiently generated, and the heat transfer from the cylindrical coil 8 that generates heat to the housing 4 can be performed more efficiently. Although in the embodiment shown in FIG. 1, the cylindrical outer rotor 10 has a plurality of holes 13a, 13b, 13c, and 13d formed at certain intervals in the circumferential direction on the left end side in FIG. 1, the number of holes is The location of the, and the holes is not limited to the aspect illustrated in FIG. 1. In addition, in this embodiment, it is also possible to adopt the form of "the valve body 36 used in the embodiment of FIG. 4 described later" instead of the closed structure formed by the opening 14 and the plug 15. When the pressure in the housing 4 When the specific pressure is exceeded, gas is ejected from the inside of the housing 4 to the outside. Once the pressure in the housing 4 is lower than the aforementioned specific pressure, the housing 4 is sealed again to form a sealed form. In this way, the sealing and airtight structure of the housing 4 can be achieved as long as the following description can be achieved, that is, the rotation of the rotor 12 causes the liquid refrigerant 20 contained in the housing 4 to flow into the housing 4 and contact the circle. The cylindrical coil 8 takes away heat and conducts heat to the housing 4. (Embodiment 2) Fig. 2 is used to explain an example of an embodiment in which the liquid refrigerant 20 contained in the sealed casing 4 flows more efficiently in the casing 4 by the rotation of the rotor 12 Figure. The rotor 12 includes stirring blades 16 and 16 extending toward the inner peripheral surface side of the cylindrical portion 2 a of the casing 4. Since the other structure is the same as that of the embodiment illustrated in FIG. 1, the common members are given the same reference numerals and their descriptions are omitted. The rotor 12 is provided with stirring blades 16, 16 extending toward the inner peripheral surface side of the cylindrical portion 2a of the casing 4, and the formation of the "inside the casing 4" produced by the rotation of the rotor 12 in the circumferential direction of the rotation center axis 5 The flow of the liquid refrigerant 20" can be performed more reliably and powerfully. In the embodiment shown in FIG. 2, the stirring blades 16, 16 are from the "radial outer side of the rotor 12, and the right end surface in FIG. 2" toward the "housing 4 facing the inner peripheral surface of the cylindrical portion 2a. The outer side in the radial direction of the housing 4 extends on the inner surface side of the disc-shaped portion 2b of the housing 4. Therefore, when the coreless motor 1 accommodates the liquid refrigerant 20 as shown in FIGS. 1 and 2 according to the arrangement shown in FIGS. 1 and 2, or, although not shown, when there is no The core motor 1 has a configuration in which the disc-shaped portion 2b of the housing 4 forms the lower side, and the front end of the rotation center shaft 5 extending toward the outside of the housing 4 faces the upper side. The liquid refrigerant contained in the housing 4 is placed in 20 positions. In the case of the disc-shaped portion 2b, the "flow of the liquid refrigerant 20 in the housing 4" generated by the rotation of the rotor 12 in the circumferential direction of the rotation center axis 5 can be performed more reliably and powerfully. (Embodiment 3) Fig. 3 is another example of the embodiment in which the rotation of the rotor 12 allows the liquid refrigerant 20 contained in the sealed casing 4 to flow in the casing 4 more efficiently. Concept illustration. The cylindrical coil 8 is provided with a protrusion 17 for stirring extending toward the outside in the radial direction. Once the rotor 12 rotates, as shown in FIG. 3, the liquid refrigerant 20 will be pushed to a portion "facing the radially outer surface of the cylindrical coil 8 "due to the centrifugal force generated by the rotation of the rotor 12. In FIG. 3, a magnet 11 is provided on the inner surface of the outer flange 10 in the radial direction, and the liquid refrigerant 20 enters the periphery of the magnet 11 to form a liquid accumulation. Since the stirring protrusion 17 extending from the cylindrical coil 8 toward the radially outer side extends into the liquid accumulation place, once the rotor 12 rotates, the liquid accumulation is destroyed, and the liquid refrigerant 20 is efficiently stored in the housing 4内流。 Within the flow. (Embodiment 4) In the embodiment shown in FIGS. 1 and 2, the center of rotation extending in the axial direction at the center of the sealed housing 4 and rotatably supported by the housing 4 is shown in FIG. 4 In the illustrated embodiment, it is composed of a first rotation center axis 5a, a second rotation center axis 5b, and a third rotation center axis 5c extending in the axial direction (the left-right direction in FIG. 4). In addition, in the embodiment shown in FIG. 4, a disk-shaped cover 3 is formed, through bearings 6a, 6b, and is rotatably attached to the "cylindrical portion 2a constituting the cylindrical housing 2 as shown in FIG. 4. The right end of the middle is open", and the third rotation center axis 5c is fixed to the disc-shaped cover 3 and rotates together with the disc-shaped cover 3. In the embodiments of FIGS. 1 and 2, the rotor 12 is supported by the rotation center shaft 5 on the radial inner side thereof, and the rotation center shaft 5 directly rotates due to the rotation of the rotor 12. In the embodiment shown in FIG. 4, the housing 4 is equipped with a reducer, the reducer is formed by a planetary gear mechanism, the planetary gear mechanism, the rotation movement of the rotor 12 centered on the rotation center axis, Conducted into: the rotation movement output part, that is, the rotation movement of the third rotation center shaft 5c. In the embodiment shown in FIGS. 1 and 2, the rotation center shaft 5 becomes the rotation output part of the coreless motor 1. According to the above-mentioned structure, in the embodiment shown in FIG. 4, the third rotation center shaft 5c, becomes the rotational motion output part of the coreless motor 1. In the embodiment shown in FIGS. 1 and 2, the disc-shaped cover 3 of the housing 4 has an opening 14 sealed by a plug 15. The plug 15 is removed from the opening 14, and a specified amount After the liquid refrigerant 20 is injected into the housing 4, the opening 14 is closed again with the plug 15 to maintain the airtight state of the housing 4. In contrast, in the embodiment illustrated in FIG. 4, the sealed housing 4 includes a valve body 36. In FIG. 4, the cylindrical part 2a of the housing 4 is equipped with the valve body 36. As shown in FIG. The valve body 36 is freely attachable to and detachable from the cylindrical portion 2a. The valve body 36 is removed from the cylindrical portion 2a, and the liquid refrigerant 20 is injected into the housing 4, again as shown in FIG. 4, the valve body 36 is attached to the cylindrical portion 2a to form a structure that seals the housing 4. The valve body 36 has a function of preventing liquid from leaking from the inside of the housing 4 to the outside. In addition, it has a structure in which when the pressure in the housing 4 exceeds a specific pressure, gas is ejected from the inside of the housing 4 to the outside, and once the pressure in the housing 4 is lower than the aforementioned specific pressure, the housing 4 is sealed again. The other structures are the same as those of Embodiments 1 and 2 described with reference to Figs. 1 and 2. Therefore, for members common to the embodiment illustrated in FIGS. 1 and 2, the common figure numbers are indicated in FIG. 4 and the description thereof will be omitted. On the front end side (the left side of FIG. 4) of the first rotation center shaft 5a that "supports the radial inner side of the rotor 12, and in FIG. 4, the right end is rotatably supported by the disc-shaped portion 2b of the housing 4", The first sun gear 30 constituting the "reducer formed by the planetary gear mechanism" is fixed. Once the first rotation center shaft 5a and the first sun gear 30 rotate corresponding to the rotation of the rotor 12, the rotation will be transmitted from the first sun gear 30 through the first planet gear 31 and the first carrier 32 to the second The rotation center axis 5b, the second rotation center axis 5b and the first rotation center axis 5a rotate in the same circumferential direction. On the front end side (the left side of FIG. 4) of the second rotation center shaft 5b, a second sun gear 33 constituting a "reducer formed by a planetary gear mechanism" is fixed. Once the second sun gear 33 rotates due to the rotation of the second rotation center shaft 5b, the rotation will be transmitted from the second sun gear 33 through the second planet gear 34 and the second carrier 35 to the third rotation center. The shaft 5c is supported by a fixed disk-shaped cover 3", and the third rotation center shaft 5c and the second rotation center shaft 5b rotate in the same circumferential direction (for example, the direction indicated by the arrow 21). Even in this embodiment, in a state where "a magnetic field with a ring-shaped cross section is formed between the inner flange 9 and the outer flange 10", by supplying a specific current to the cylindrical coil 8, the rotor 12 rotates in the first rotation. The central shaft 5a rotates in the circumferential direction. The radially inner side of the inner flange 9 constituting the rotor 12 is supported by the first rotation center shaft 5a, and accordingly, the first rotation center shaft 5a also rotates in the circumferential direction. The rotation of the first rotation center shaft 5a is transmitted to and output from the third rotation center shaft 5c through the speed reducer formed by the planetary gear mechanism described above. In the embodiment illustrated in FIG. 4, the above-mentioned two-stage reduction mechanism is used, and the torque generated by the rotation of the rotor 12 is increased, and the torque is output from the third rotation center shaft 5c. The reducer formed according to the above-mentioned structure is housed in a cylindrical gear extending in the direction in which the first rotation center shaft 5a, the second rotation center shaft 5b, and the third rotation center shaft 5c as the rotation center shaft extend. Box 18. Even in the coreless motor 1 of the embodiment shown in FIG. 4, the liquid refrigerant 20 contained in the sealed casing 4 is rotated by the rotor 12 in the circumferential direction of the first rotation center axis 5a as described above. , While flowing in the shell 4. In the embodiment shown in FIG. 4, the liquid refrigerant 20 contained in the housing 4 has a structure in which the liquid surface extending in the axial direction contacts the outer peripheral surface of the outer flange 10 in a stationary state. Therefore, as in the description using the embodiment of FIG. 1, once the rotor 12 rotates in the circumferential direction of the rotation center shaft 5, the liquid refrigerant 20 contacting the outer peripheral surface of the outer flange 10 will be pulled by the outer peripheral surface of the outer flange 10 , And flow in the "circumferential direction in which the outer flange 10 rotates", and it rises in the circumferential direction on the outer peripheral surface of the outer flange 10. After that, the liquid refrigerant 4 "in the housing 4, which has risen in the circumferential direction on the outer peripheral surface of the outer flange 10", by its own weight, falls along the outer peripheral surface of the outer flange 10 to "Figure 1 The bottom side of the housing 4 in the horizontal state shown in the figure". During the repetitive flow of the liquid refrigerant 20 by the rotational movement of the rotor 12, it flows from the left and right ends in FIG. 4 into the space formed between the inner side of the outer flange 10 and the outer side of the cylindrical coil 8. The liquid refrigerant 20 in a part of the "space part" is operated to contact the cylindrical coil 8 whose temperature starts to rise. In this way, when a part of the liquid refrigerant 20 contacts the cylindrical coil 8 that generates heat, the cylindrical coil 8 is cooled. In addition, the liquid refrigerant 20 that takes away heat from the heated cylindrical coil 8 flows in the housing 4, and the heat is transferred from the liquid refrigerant 20 to the housing 4, so that the temperature of the housing 4 rises, and the housing 4 The entire outer surface of 4 performs heat dissipation. Thereby, it is possible to suppress overheating of the coil during the operation of the coreless motor, supply excess current to the coil, and enable high rotational output of the coreless motor 1. In addition, the liquid refrigerant 20 causes a part of the liquid refrigerant 20 to flow into the cylindrical gear box 18 by such a flow. Therefore, if the "oil used for the lubrication of mechanical action parts" is used as the liquid refrigerant 20, the lubrication of the gear parts in the "reducer formed by the planetary gear mechanism described above" can be achieved. In addition, as the rotor 12 rotates at a high speed in the circumferential direction of the rotation center shaft 5, as described above, the internal space of the housing 4 becomes a gas-liquid mixed state, which can efficiently perform "from a cylinder that generates heat due to energization." The heat conduction of the core-shaped coil 8 to the housing 4”, and “the overheating of the cylindrical coil 8 during the operation of the coreless motor 1 can be suppressed, and excess current can be supplied to the cylindrical coil 8 to enable high rotational output of the coreless motor 1” This point is the same as the content explained in the first and second embodiments. In this embodiment, the housing 4 is equipped with a valve body 36 having the above-mentioned function. Therefore, for example, the high-output operation of the coreless motor 1 can be performed for a long time. When the pressure in the housing 4 exceeds a certain pressure, gas is ejected from the inside of the housing 4 to the outside. According to this, the high-output operation of the coreless motor 1 can be performed for a long time. When the pressure in the housing 4 becomes higher than the allowable internal pressure, by performing the above-mentioned discharge (exhaust) of the valve body 36, it is possible to prevent The pressure is above the allowable internal pressure. In this embodiment, the rotational movement of the rotor 12 with the central axis of rotation as the center is transmitted to the "rotational movement output part, that is, the rotational movement of the third rotational central axis 5c", which is the aforementioned deceleration formed by the planetary gear mechanism. The machine is equipped in the shell 4. If the "oil used for the lubrication of mechanical action parts" is used as the liquid refrigerant 20, the lubrication of the gear parts in the "reducer formed by the planetary gear mechanism described above" can be achieved. As a result, in the embodiment illustrated in FIG. 4, the speed reducer formed by the planetary gear mechanism is provided in the housing 4, which can suppress the occurrence of "a plurality of gears meshing with each other in rotational motion". The sound can form a coreless motor that can be driven quietly. With proper viscosity of oil, the rotating part formed by the plural gears constituting the reducer can be maintained stable. By forming the reducer with a plurality of gears, metal powder is generated due to metal wear caused by the rotation of the gears. The metal powder is mixed with the above-mentioned oil used as the liquid refrigerant 20, and there is a concern that the oil may be contaminated. However, since the rotor 12 is equipped with the magnet 11 as described above, the metal powder is adsorbed by the magnet 11, and oil contamination can be prevented. The gears that make up the "reducer formed by the planetary gear mechanism" can be made of synthetic resin or stainless steel. In this way, even if water is used as the refrigerant, the generation of rust can be prevented. If the refrigerant is oil, it can prevent the generation of rust. Even if the gear is made of iron, in order to prevent the generation of rust due to the use of water as the refrigerant, it is not limited to the gear side. Water). Here, once the structure that "the speed reducer formed by the planetary gear mechanism is made of synthetic resin" is formed, the problem of "metal powder generated by metal abrasion due to gear rotation" does not exist. Although the motor usually uses grease, the highly viscous substance like grease undergoes centrifugal force as it rotates, and then separates from the painted part. In contrast to this, in the present invention, grease is not required because oil is used. Originally, the grease used for the gear part of the gear mechanism for lubrication is usually liquefied at around 80°C, so that the "effect of using grease" cannot be obtained. Therefore, when grease is used for the lubrication of the gear part, it is generally avoided to reach a temperature of about 80°C. In the coreless motor of the present embodiment, the temperature of the cylindrical coil part that generates heat due to energization usually exceeds 100°C. Based on this, grease is not suitable. Furthermore, instead of the structure using the valve body 36, the closed structure using the opening 14 and the stopper 15 described in the first embodiment may be adopted. (Embodiment 5) FIGS. 5 to 7 are diagrams for explaining other embodiments of Embodiment 4 (FIG. 4). In Embodiment 4 (FIG. 4), as described above, the speed reducer is housed in the extending direction of the first rotation center axis 5a, the second rotation center axis 5b, and the third rotation center axis 5c as the rotation center axis. "Extended cylindrical gear box 18. In the fifth embodiment illustrated in FIGS. 5 to 7, the gear box 18 includes a hole 19 that penetrates the gear box 18 in the radial direction. As described above, as the rotor 12 rotates in the circumferential direction of the first rotation output shaft 5 a, the liquid refrigerant 20 contained in the sealed casing 4 flows into the casing 4. A part of the liquid refrigerant 20 flowing in the housing 4 contacts the heating cylindrical coil and vaporizes. Thereby, the internal space of the housing 4 becomes a gas-liquid mixed state, and the "heating due to energization" can be efficiently executed. The heat conduction of the cylindrical coil 8″ to the housing 4. At the same time, the liquid refrigerant 20 flowing in the housing 4 can be used to achieve lubrication of the gears in the "reducer formed by the planetary gear mechanism". In the embodiment illustrated in FIGS. 5 to 7, the cylindrical gear box 18 that houses the reducer inside has a hole 19 penetrating the gear box 18 in the radial direction, whereby the liquid refrigerant 20 can be removed. Efficiently supply to the reducer. Therefore, the lubrication of the gear parts by the liquid refrigerant 20 can be performed more effectively. As shown in FIG. 12, a state may be formed in which the liquid surface of the liquid refrigerant 20 extending in the axial direction contacts the outermost peripheral edge in the radial direction of the planetary gear mechanism 40 in the stationary state. As described above, once the rotor 12 starts to rotate, the liquid refrigerant 20 is directly supplied to the speed reducer, and the liquid refrigerant 20 lubricates each gear part more effectively. In the embodiment illustrated in FIGS. 5 to 7, a specific interval is maintained in the circumferential direction of the cylindrical gear box 18, or a specific interval is maintained in the longitudinal direction of the cylindrical gear box 18, respectively. Multiple holes19. The number of holes 19 and the positions where they are formed can be set in various ways. (Embodiment 6) Figs. 8 to 10 are diagrams for explaining other embodiments of the fourth embodiment. In FIGS. 8 to 10, the "sealing structure of the housing 4 using the opening 14 and the plug 15" and "the sealing structure of the housing 4 using the valve body 36" described in the first and fourth embodiments are omitted. "Icon. In Embodiment 4 (FIG. 4 ), the rotation center axis constituted by the first rotation center axis 5 a, the second rotation center axis 5 b, and the third rotation center axis 5 c forms a fixed axis 5 d penetrating the housing 4. The housing 4 is rotatably supported by the fixed shaft 5d through an oil seal in a state where the inside is sealed. The cylindrical portion 2a constituting the housing 4 serves as a rotational movement output portion. In the embodiment of FIGS. 8 to 10, the radial center side of the inner flange constituting the rotor 12 is rotatably supported by the fixed shaft 5d. Then, the outer periphery 9a of the radial center side portion of the inner flange rotatably supported by the fixed shaft 5d constitutes the first sun gear in the fourth embodiment (FIG. 4). In the fourth embodiment (Figure 4), the rotation of the first sun gear that rotates with the first rotation center shaft is transmitted through the first planetary gear, the first carrier, the second sun gear, the second planetary gear, and the third carrier. , And transmitted to the rotation output part, that is, the third rotation output shaft. In the embodiment illustrated in FIGS. 8 to 10, the rotational movement of the first sun gear formed by "the outer periphery 9a of the radially central portion of the inner flange rotatably supported by the fixed shaft 5d" is transmitted through The first planetary gear, the first carrier, the second sun gear, the second planetary gear, and the third carrier rotatably supported by the fixed shaft 5d are transmitted as: "rotational motion output part, which constitutes the housing 4 The fixed shaft 5d of the cylindrical portion 2a″ rotates in the circumferential direction as the center. The other basic structure and mechanism are the same as those described in Embodiment 4 (Figure 4). Even in this embodiment, the liquid refrigerant 20 contained in the sealed casing 4 flows into the casing 4 by the rotation of the rotor 12 in the circumferential direction of the fixed shaft 5d. As a result, the internal space of the housing 4 becomes a gas-liquid mixed state, and "heat conduction from the cylindrical coil 8 that generates heat due to energization to the housing 4" can be efficiently performed, and "the operation of the coreless motor 1 can be suppressed. The point that the overheating of the cylindrical coil 8 supplies excess current to the cylindrical coil 8 and enables the coreless motor 1 to have a high rotational output" is the same as the content described in the first and second embodiments. In addition, by using the "oil used for the lubrication of mechanical action parts" as the liquid refrigerant 20, it is possible to achieve "the lubrication of the gear parts in the reducer formed by the planetary gear mechanism" and the effect of the planetary gear mechanism The reducer is equipped in the housing 4 to suppress the sound generated by the existence of "a plurality of gears meshing with each other in rotational motion", and can form a coreless motor that can be driven quietly. (Test Example) The test was conducted using the ironless motor (CPH80F) sold by the applicant in this case. The coreless motor is structured with: a cylindrical coil arranged in a housing in a concentric circle with respect to the central axis of rotation, one end surface of which is supported by the stator and extends in the "extending direction of the central axis of rotation"; The rotor and the rotor are arranged concentrically with respect to the central axis of rotation in the housing, and rotate in the circumferential direction of the central axis of rotation. The two coreless motors (CPH80F) used in the test are all sealed in a closed structure. One of them is filled with water as a liquid refrigerant, while the other is operated in a normal state without water. In the operation test, both of the two sets adopt the conditions of 24Vdc input, torque: 1Nm, output: 380W, and they are carried out simultaneously in the same room. The results are shown in Table 1 (Example (with liquid refrigerant (water)) and Table 2 (Comparative Example (without liquid refrigerant (water))) below.

According to the test results, it can be confirmed that the liquid refrigerant is contained in the sealed coreless motor housing, the rotation of the rotor causes the liquid refrigerant to flow in the housing, and the liquid refrigerant is brought into contact with the cylindrical coil that generates heat. Promote the vaporization of part of the liquid refrigerant to form a gas-liquid mixed state in the housing, thereby improving the heat transfer efficiency in the housing. The temperature of the housing rises as the temperature of the cylindrical coil rises, thereby achieving an efficient Heat dissipation. (Embodiment of Generator) Although the embodiment of the coreless motor has been described above, the present invention is not limited to the above-mentioned embodiment. The structure of the motor is basically the same as that of the generator. In the above-mentioned structure and structure of the coreless motor, the device that rotates by using the rotational force input by the rotor and performs power generation according to it is a generator. Therefore, in the present invention, an embodiment of a generator having the above-mentioned structure and structure can be formed. Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various design changes are possible without departing from the scope described in the scope of the patent application.

1: Ironless motor 2: Cylindrical shell 2a: Cylindrical part 2b: Disc-shaped part 3: cover part 4: shell 5: Rotate the central axis 5a: The first rotation center axis 5b: The second central axis of rotation 5c: Third rotation center axis 5d: fixed shaft 6a~6d: Bearing 7a, 7b: liner 8: Cylindrical coil 9: Inside 9a: outer circumference 10: Outer 锷 11: Magnet 12: Rotor 13a~13d: hole 14: Opening 15: bolt 16: mixing blade 17: protrusion 18: Gear box 19: Hole 20: Liquid refrigerant 21: circumferential direction 30: The first sun gear 31: The first planetary gear 32: The first bracket 33: second sun gear 34: second planetary gear 35: second bracket 36: valve body

[Fig. 1]: Used to explain the internal structure of the coreless motor of one embodiment of the present invention, and a part of the enlarged cross-sectional view is omitted. [Fig. 2]: Used to explain the internal structure of another embodiment of the coreless motor of the embodiment shown in Fig. 1, and a part of the enlarged cross-sectional view is omitted. [Fig. 3]: A conceptual diagram for explaining another embodiment of the liquid refrigerant stirring means in another embodiment of the coreless motor of the embodiment shown in Fig. 1. [Fig. 4]: Used to explain the internal structure of the coreless motor of another embodiment of the present invention, and a part of the enlarged cross-sectional view is omitted. [Fig. 5]: Used to explain the internal structure of another embodiment of the coreless motor of the embodiment shown in Fig. 4, and a part of the enlarged cross-sectional view is omitted. [Fig. 6]: A side view of the cylindrical gear case used in the embodiment shown in Fig. 5. [Fig. [Fig. 7]: A perspective view of the cylindrical gear box used in the embodiment shown in Fig. 5. [Fig. [Fig. 8]: A perspective view of another embodiment of the coreless motor of the embodiment shown in Fig. 4. [Fig. [Fig. 9]: Used to illustrate the internal structure of the coreless motor shown in Fig. 8, with a partial cut-out and a partly omitted perspective view. [Fig. 10]: Used to explain the internal structure of the coreless motor shown in Fig. 8, and a part of the cross-sectional view is omitted. [Figure 11]: (a) is used to illustrate the height position of the liquid surface in the static state of the liquid refrigerant contained in the housing in the embodiment shown in Figures 1 and 2, and a part of the cross-sectional view is omitted. (b) is used to explain the height position of the liquid surface in the static state of the liquid refrigerant, which is higher than the case of Fig. 11(a), and a part of the cross-sectional view is omitted. [Fig. 12]: is an example of the height position of the liquid surface in the static state of the liquid refrigerant contained in the housing in the embodiment shown in Fig. 4, and a part of the cross-sectional view is omitted.

1: Ironless motor

2: Cylindrical shell

2a: Cylindrical part

2b: Disc-shaped part

3: cover part

4: shell

5: Rotate the central axis

6a~6d: Bearing

7a, 7b: liner

8: Cylindrical coil

9: Inside

10: Outer 锷

11: Magnet

12: Rotor

13a~13d: hole

14: Opening

15: bolt

20: Liquid refrigerant

21: circumferential direction

Claims (5)

A coreless motor with: The central axis of rotation, which extends in the direction of the axis in the center of the closed housing; and Cylindrical coils, in the housing, are arranged concentrically with respect to the central axis of rotation, one end surface of which is supported by the stator and extends in the direction of extension of the central axis of rotation; and The rotor, in the housing, is arranged concentrically with respect to the central axis of rotation, rotates in the circumferential direction of the central axis of rotation, and is surrounded by cylinders that sandwich the cylindrical coils in the radial direction. A shaped inner flange and a cylindrical outer flange are formed, and a magnet is provided on the outer surface of the inner flange or the inner surface of the outer flange; and The liquid refrigerant is contained in the housing, and in a static state, the liquid surface extending in the axial direction contacts the outer peripheral surface of the outer flange, Due to the rotation of the rotor, the liquid refrigerant flows in the housing and contacts the cylindrical coil. The coreless motor described in claim 1, wherein the outer flange is provided with a hole that penetrates the outer flange in a radial direction. A coreless motor with: The central axis of rotation, which extends in the direction of the axis in the center of the closed casing; and Cylindrical coils, in the housing, are arranged concentrically with respect to the central axis of rotation, one end surface of which is supported by the stator and extends in the direction of extension of the central axis of rotation; and The rotor, in the housing, is arranged concentrically with respect to the central axis of rotation, rotates in the circumferential direction of the central axis of rotation, and is surrounded by cylinders that sandwich the cylindrical coils in the radial direction. A shaped inner flange and a cylindrical outer flange are formed, and a magnet is provided on the outer surface of the inner flange or the inner surface of the outer flange; and The reducer is equipped in the housing and is formed by a planetary gear mechanism that transmits the rotational movement of the rotor with the rotational center axis as the center into the rotational movement of the rotational movement output part; and The liquid refrigerant is contained in the housing, and in a static state, the liquid surface extending in the axial direction contacts the outer peripheral surface of the outer flange, Due to the rotation of the rotor, the liquid refrigerant flows in the housing and contacts the cylindrical coil. The coreless motor according to claim 3, wherein the reduction gear is housed in a cylindrical gear box extending in the extending direction of the rotation center axis, and the gear box has a hole penetrating the gear box in a radial direction . The coreless motor according to claim 3 or claim 4, wherein the liquid surface of the liquid refrigerant extending in the axial direction in the stationary state contacts the outermost periphery in the radial direction of the planetary gear mechanism.

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