JP2020036507A - Dynamo-electric machine - Google Patents

Abstract

To provide a dynamo-electric machine in which the life of a holding sleeve can be determined easily.SOLUTION: A motor 100 including an annular holding sleeve 114c made of FRP and being fitted to a rotor core 114a so as to hold a permanent magnet 114b, stuck to the outer peripheral surface of the rotor core 114a of a rotor 114, on the outer peripheral surface of the rotor core 114a includes a sensing material 115 provided on the outer peripheral surface of a revolving shaft 113 located on the outside of a stator 112 and made of the same material as a resin composing the FRP material of the holding sleeve 114c, a distance sensor 121 for measuring the distance L from the sensing material 115, an arithmetic unit 120 for determining the life of the holding sleeve 114c on the basis of information from the distance sensor 121, and a display device 123 for displaying information from the arithmetic unit 120.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electric machine such as a motor or a generator.

  An outer peripheral surface of a rotor core provided on an outer peripheral surface of a rotating shaft opposed to an inner peripheral surface of the stator core, with a rotating shaft disposed rotatably inside the stator core so as to penetrate a cylindrical stator having a coil provided on the stator core. In a rotating electric machine such as a motor or a generator equipped with a rotor in which a plurality of tile-shaped permanent magnets are arranged and attached in the circumferential and axial directions, the permanent magnets of the rotor are separated by centrifugal force as the rotating shaft rotates. Therefore, an annular holding sleeve made of fiber reinforced resin (FRP) containing fibers such as carbon and glass is fitted to the outer periphery of the rotor core so as to be positioned on the surface of the permanent magnet. Thereby, the permanent magnet is pressed and held on the outer peripheral surface of the rotor core (for example, see Patent Document 1 below).

JP-A-2017-050925 JP-A-04-193047 JP 2015-075428 A

  In a rotating electric machine in which a permanent magnet is held on the outer peripheral surface of a rotor core by a holding sleeve as described above, when the rotating sleeve is operated, the holding sleeve is gradually deteriorated by heat, oxygen in the air, and the like, and a force for holding the permanent magnet is increased. It gradually decreases. For this reason, in the rotating electric machine, it is necessary to take out the rotor from the inside of the stator at the time of maintenance or the like and check the state of the holding sleeve to judge the life of the holding sleeve, which is extremely troublesome. I was

  Therefore, an object of the present invention is to provide a rotating electric machine that can easily determine the life of a holding sleeve.

  In order to solve the above-described problem, a rotating electric machine according to the present invention includes a cylindrical stator having a stator core provided with a coil, and a rotating shaft rotatably disposed inside the stator core so as to penetrate the stator. A rotor core provided on an outer peripheral surface of the rotating shaft facing an inner peripheral surface of the stator core of the stator; a permanent magnet attached to an outer peripheral surface of the rotor core; and a permanent magnet attached to the outer peripheral surface of the rotor core. An annular holding sleeve made of a fiber-reinforced resin material fitted to the rotor core so as to be held at the rotor core. The holding sleeve provided on an outer peripheral surface of the rotating shaft located outside the stator. A distance meter for measuring a distance L between a sensing material made of the same resin material as the resin constituting the fiber-reinforced resin material and the sensing material And means, based on information from the distance measuring means, characterized in that it comprises a determining operation means the life of the retaining sleeve, and a display means for displaying information from said calculation means.

  Further, a rotating electric machine according to the present invention is characterized in that, in the rotating electric machine described above, the sensing material is filled in a filling recess formed on an outer peripheral surface of the rotating shaft.

  Further, in the rotating electric machine according to the present invention, in the above-described rotating electric machine, in the above-described rotating electric machine, the calculation unit may determine a change amount ΔL of a distance L between the distance measurement unit and the sensing material based on information from the distance measurement unit. , And the life of the holding sleeve is determined from a map of the state area of the holding sleeve corresponding to the change amount ΔL, which is set in advance.

  The rotating electrical machine according to the present invention is characterized in that, in the rotating electrical machine described above, the sensing material fits in an annular shape on the outer peripheral surface of the rotating shaft.

  In addition, the rotating electric machine according to the present invention, in the rotating electric machine described above, further includes a rotation phase detection unit that detects a rotation phase of the sensing material, wherein the calculation unit includes information from the distance measurement unit and the rotation phase detection unit. A profile P of the outer periphery of the sensing material is obtained based on the above, and the life of the holding sleeve is determined from a map of a state area of the holding sleeve corresponding to the profile P set in advance. And

  ADVANTAGE OF THE INVENTION According to the rotary electric machine which concerns on this invention, the distance between the resin which is provided in the outer peripheral surface of the rotating shaft located outside a stator and which comprises the fiber reinforced resin material of a holding sleeve, and the same resin material sensing material. L is measured by the distance measuring means, the calculating means determines the life of the holding sleeve based on the information from the distance measuring means, and the display means displays the information from the calculating means. Therefore, the life of the holding sleeve can be easily determined because the state of the holding sleeve can always be grasped during operation without having to pull out the rotor from the motor.

FIG. 2 is a schematic configuration diagram of a main part of a first embodiment of a rotating electric machine according to the present invention. 2 is a map of a state area of a holding sleeve corresponding to a change amount ΔL, which is input in advance to the arithmetic device of FIG. 1. It is a principal part schematic block diagram of the 2nd embodiment of the rotary electric machine concerning this invention. 4 is a map of a state area of a holding sleeve corresponding to a profile P, which is input in advance to the arithmetic device in FIG. 3.

  An embodiment of a rotating electrical machine according to the present invention will be described with reference to the drawings, but the present invention is not limited to only the following embodiments described with reference to the drawings.

<First embodiment>
A first embodiment in which a rotating electric machine according to the present invention is applied to a motor will be described with reference to FIGS.

  As shown in FIG. 1, a cylindrical stator 112 in which a coil 112b is mounted on a stator core 112a is coaxially mounted inside a cylindrical housing 111. A rotating shaft 113 passes through the inside of the stator 112 coaxially. The rotating shaft 113 is rotatably supported by the housing 111 at both ends via bearings 111a.

  On the outer peripheral surface of the rotating shaft 113, a rotor core 114 a of the rotor 114 is provided coaxially with the rotating shaft 113 so as to face the inner peripheral surface of the stator 112. A plurality of tile-shaped permanent magnets 114b are attached on the outer peripheral surface of the rotor core 114a so as to be arranged in a plurality along the circumferential direction and the axial direction of the rotor core 114a. On the surface of the permanent magnet 114b, an annular holding sleeve 114c made of fiber reinforced resin (FRP) containing fibers such as glass or carbon is positioned so as to be coaxial with the rotor core 114a. The permanent magnet 114b is fitted to the outer periphery of the rotor core 114a so as to be pressed and held against the outer peripheral surface of the rotor core 114a.

  Note that the rotating shaft 113 and the rotor core 114a of the rotor 114 can be applied either separately or integrally.

  At one end (near the left end in FIG. 1) of the rotating shaft 113 located outside the stator 112 in the housing 111, there is distance measuring means for measuring a distance L between the rotating shaft 113 and the outer peripheral surface. An optical distance sensor 121 is provided. On a part of the outer peripheral surface of the rotary shaft 113 facing the distance sensor 121, a concave filling recess 113a is formed. Inside the filling recess 113a, a sensing material made of the same resin material (for example, made of an epoxy resin material or the same FRP as the holding sleeve 114c) is used as a resin (for example, an epoxy resin) constituting the FRP of the holding sleeve 114c. 115 is filled so as to be flush with the outer peripheral surface of the rotating shaft 113.

  That is, the sensing member 115 is provided on the outer peripheral surface near one end (near the left end in FIG. 1) of the rotating shaft 113 located outside the stator 112, and the distance sensor 121 detects the distance L from the sensing member 115. Can be measured.

  The distance sensor 121 is connected to an input unit of a computing device 120 which is a computing means provided outside the housing 111. The output unit of the arithmetic device 120 is connected to a display device 123 that is a display unit that displays information from the arithmetic device 120 so that the information can be visually or audibly grasped. Based on the information from 121, the life of the holding sleeve 114c can be determined and displayed on the display device 123 (details will be described later).

  In the motor 100 according to the present embodiment, when electricity flows through the coil 112b of the stator 112, the rotating shaft 113 rotates via the rotor 114, and a driving force is output. At the same time, the distance sensor 121 measures a distance L between the rotating shaft 113 and the outer peripheral surface facing the rotating shaft 113.

  When the motor 100 is operated in this manner, the holding sleeve 114c of the rotor 114 is gradually deteriorated by heat, oxygen in the air, and the like, and the sensing material 115 is also gradually deteriorated, and the surface is missing. become.

  The arithmetic device 120 calculates a change amount ΔL of the distance L (that is, a missing amount of the sensing material 115) based on information from the distance sensor 121, and corresponds to the preset change amount ΔL. The life of the holding sleeve 114c is determined from the map of the state area of the holding sleeve 114c (see FIG. 2).

  That is, when the change amount ΔL is smaller than the first reference value ΔL1 (ΔL <ΔL1), the arithmetic unit 120 determines that the safety range S is satisfied based on the map, and outputs information indicating that the vehicle is safe. Is displayed on the display device 123. If the change amount ΔL is equal to or larger than the first reference value ΔL1 but smaller than the second reference value ΔL2 (ΔL1 ≦ ΔL <ΔL2), the attention area is determined based on the map. A is displayed, and information indicating caution is displayed on the display device 123. If the change amount ΔL is equal to or larger than the second reference value ΔL2 (ΔL2 ≦ ΔL), the exchange area is determined based on the map. C is determined to be C, and information indicating the exchange is displayed on the display device 123.

  That is, in the motor 100 according to the present embodiment, the sensing material 115 whose correlation with the state of the holding sleeve 114c is obtained in advance is arranged at a position separated from the stator 112 or the permanent magnet 114b, and the sensing material 115 is sensed by the distance sensor 121. The degradation state of the holding member 114c and the sensing material 115 may be different due to a difference in an attachment environment (mainly temperature) between the holding sleeve 114c and the sensing material 115. The correlation between the deterioration state of the holding sleeve 114c and the sensing material 115 is determined in advance, so that the life of the holding sleeve 114c can be determined without directly checking the state of the holding sleeve 114c. It is.

  For this reason, in the motor 100 according to the present embodiment, the state of the holding sleeve 114c of the rotor 114 can be constantly grasped during operation without having to take out the rotor 114 from the inside of the stator core 112a of the stator 112 during maintenance or the like. Can be.

  Therefore, according to the motor 100 according to the present embodiment, the life of the holding sleeve 114c of the rotor 114 can be easily determined.

  Further, since the state of the holding sleeve 114c of the rotor 114 can be constantly grasped even during operation, even if the holding sleeve 114c starts to deteriorate rapidly due to a change in conditions such as an operating environment, the state is displayed in real time. The maintenance can be easily set at an optimal time.

  Further, since the sensing material 115 provided on the outer peripheral surface of the rotating shaft 113 located outside the stator 112, that is, disposed at a position separated from the stator 112 and the permanent magnet 114b, is measured by the distance sensor 121, It is not necessary to process the stator 112 so that the holding sleeve 114c can be measured by a sensor or the like, so that the measurement can be performed very easily and the measurement in a strong magnetic field can be avoided, thereby suppressing a decrease in measurement accuracy. Can be.

<Second embodiment>
A second embodiment in which the rotating electric machine according to the present invention is applied to a motor will be described with reference to FIGS. Note that, for the same parts as those in the above-described embodiment, the same reference numerals as those used in the description of the above-described embodiment will be used, and the description that is the same as that of the above-described embodiment will be omitted.

  As shown in FIG. 3, on the outer peripheral surface near one end (near the left end in FIG. 3) of the rotating shaft 113 located outside the stator 112 in the housing 111, a resin (for example, the FRP) of the holding sleeve 114c is formed. , Epoxy resin) is fitted with an annular sensing material 215 made of the same resin material (for example, made of an epoxy resin material or made of the same FRP as the holding sleeve 114c). At a position facing the outer peripheral surface of the sensing member 215, a distance sensor 121 for measuring a distance L between the sensing member 215 and the sensing member 215 is provided.

  The other end (the right end in FIG. 3) of the rotating shaft 113 is provided with a rotating phase sensor 222 such as a resolver or a rotary encoder which is a rotating phase detecting means for detecting the rotating phase of the rotating shaft 113, that is, the rotating phase of the sensing material 215. Is provided.

  The distance sensor 121 and the rotation phase sensor 222 are connected to an input unit of a computing device 220 that is a computing unit provided outside the housing 111. The output unit of the arithmetic device 220 is connected to the display device 123. The arithmetic device 220 determines the life of the holding sleeve 114c based on information from the distance sensor 121 and the rotation phase sensor 222, It can be displayed on the display device 123 (details will be described later).

  That is, in the motor 200 according to the present embodiment, in place of the sensing material 115 in the filling recess 113a formed on the outer peripheral surface of the rotating shaft 113 of the motor 100 according to the above-described embodiment, the rotation without the filling recess 113a is performed. An annular sensing material 215 fitted to the outer peripheral surface of the shaft 113 is applied, and a rotation sensor 222 for detecting the rotation phase of the rotating shaft 113, that is, the rotation phase of the sensing material 215, is further applied.

  In the motor 200 according to the present embodiment, when electricity flows through the coil 112b of the stator 112, the rotating shaft 113 rotates via the rotor 114 and the driving force is output as in the case of the above-described embodiment. Is done. At the same time, the distance sensor 121 measures the distance L between the sensing member 215 and the outer peripheral surface, and the rotation phase sensor 222 determines the rotation phase of the rotating shaft 113, that is, the rotation phase of the sensing member 215. Is detected.

  When the motor 200 is operated in this manner, as described in the above-described embodiment, the holding sleeve 114c of the rotor 114 gradually deteriorates due to heat, oxygen in the air, and the like, and the sensing material 215 also It gradually deteriorates and the surface becomes chipped.

  The arithmetic unit 220 obtains a profile P of the outer periphery of the sensing material 215 based on information from the distance sensor 121 and the rotation phase sensor 222, and inputs a profile of the holding sleeve 114c corresponding to the profile P, which is input in advance. The life of the holding sleeve 114c is determined from the state area map (see FIG. 4).

  That is, when the profile P is larger than the first reference profile P1 in all cases (P1 <P), the arithmetic device 220 determines that the profile is in the safety zone S based on the map, and indicates that it is safe. Is displayed on the display device 123, and if at least part of the information is less than or equal to the first reference profile P1, but is larger than all of the second reference profile P2 (P2 <P ≦ P1), based on the map, Then, it is determined that the area is the attention area A, and information indicating that attention is given is displayed on the display device 123. If at least part of the information falls below the second reference profile P2 (P ≦ P2), based on the map, It is determined that the area is the exchange area C, and information indicating the exchange is displayed on the display device 123.

  That is, in the motor 100 according to the above-described embodiment, the state of the holding sleeve 114c is grasped from the missing state of the sensing material 115 provided only at one point in the circumferential direction of the rotating shaft 113. In 200, the state of the holding sleeve 114c is grasped from the missing state of the sensing material 215 provided over the entire length of the rotating shaft 113 in the circumferential direction.

  Therefore, according to the motor 200 according to the present embodiment, it is possible to obtain not only the same effects as those of the motor 100 according to the above-described embodiment, but also to more accurately grasp the state of the holding sleeve 114c. Therefore, the life of the holding sleeve 114c can be more accurately determined.

  Note that the motor 100 according to the above-described embodiment does not require information from the rotation sensor 222 that detects the rotation phase of the sensing material 215, and thus can have a simpler configuration than the motor 200.

<Other embodiments>
By the way, in the above-described embodiment, a case has been described in which the optical distance sensor 121 is applied as the distance measuring means. However, as another embodiment, a distance sensor of another type can be applied. In particular, when there is no influence of a magnetic field, a magnetic distance measuring unit can be applied.

  In the above-described embodiment, the case where the present invention is applied to the motors 100 and 200 has been described. However, the present invention is not limited to this, and a plurality of tile-shaped permanent magnets are arranged on the outer peripheral surface of the rotor core in the circumferential direction and the axial direction. A rotating electric machine such as a generator having a rotor attached thereto can be applied in the same manner as in the above-described embodiment to obtain the same effects as in the above-described embodiment.

  INDUSTRIAL APPLICABILITY The rotating electric machine according to the present invention can easily determine the life of a holding sleeve, and therefore can be used extremely advantageously in industry.

REFERENCE SIGNS LIST 100 motor 111 housing 111a bearing 112 stator 112a stator core 112b coil 113 rotating shaft 113a filling recess 114 rotor 114a rotor core 114b permanent magnet 114c holding sleeve 115 sensing material 120 arithmetic device 121 distance sensor 123 display device 200 motor 215 sensing material 220 arithmetic device 222 Phase sensor

Claims (5)

A cylindrical stator having a coil provided on a stator core,
A rotating shaft rotatably disposed inside the stator core so as to penetrate the stator;
A rotor core provided on the outer peripheral surface of the rotating shaft facing the inner peripheral surface of the stator core of the stator;
A permanent magnet attached to the outer peripheral surface of the rotor core,
A rotating holding sleeve made of a fiber-reinforced resin material fitted to the rotor core so as to hold the permanent magnet on the outer peripheral surface of the rotor core.
A sensing material made of the same resin material as the resin constituting the fiber reinforced resin material of the holding sleeve, provided on an outer peripheral surface of the rotating shaft located outside the stator;
Distance measuring means for measuring a distance L between the sensing material,
A calculating means for determining a life of the holding sleeve based on information from the distance measuring means,
Display means for displaying information from the calculation means. The rotating electric machine according to claim 1,
A rotating electric machine, wherein the sensing material is filled in a filling recess formed on an outer peripheral surface of the rotating shaft. The rotating electric machine according to claim 2,
The calculation means obtains a change amount ΔL of a distance L between the distance measurement means and the sensing material based on information from the distance measurement means, and calculates a change amount ΔL corresponding to a preset change amount ΔL. A rotating electric machine for determining the life of a holding sleeve from a map of a state area of the holding sleeve. The rotating electric machine according to claim 1,
The rotating electric machine, wherein the sensing material is fitted in an annular shape on an outer peripheral surface of the rotating shaft. The rotating electric machine according to claim 4,
A rotation phase detection unit that detects a rotation phase of the sensing material,
The calculating means obtains a profile P of the outer periphery of the sensing material based on information from the distance measuring means and the rotational phase detecting means, and sets a preset state area of the holding sleeve corresponding to the profile P A rotating electric machine characterized by determining the life of the holding sleeve from the map of (1).

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