motor

Abstract

In a motor in which the sensor unit is located at a position that coincides with the central axis of the motor when viewed in the axial direction, the present invention provides a configuration that allows for easy replacement of the power supply line and the sensor unit. [Solution] The motor comprises a rotor that rotates about a central axis, a cylindrical stator having stator coils and extending axially about the central axis radially outward from the rotor, a power supply line electrically connected to the stator coils to supply power to the stator coils, and a sensor unit for detecting the rotation of the rotor. The sensor unit is located at one axial position relative to the rotor and the stator, and is positioned to coincide with the central axis when the motor is viewed in the axial direction. The power supply line is located at one axial position, radially outward from the sensor unit when the motor is viewed in the axial direction.

Description

Technical Field

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[0001] The present invention relates to a motor.

Background Art

[0002] There is known a motor in which a power supply line for supplying power to a stator coil is located axially on one side with respect to a rotor and a stator. For example, Patent Document 1 discloses a motor having a support member that fixes a phase cable connected to an end of a coil to an attachment surface of a housing. The housing includes an opening through which the phase cable passes. In the configuration disclosed in FIG. 3A of Patent Document 1, when the motor is viewed axially, a portion of the phase cable located between the opening and the support member overlaps the central axis of the motor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, generally, in an inner rotor type motor in which a rotor is located radially inward of a stator, in order to detect the rotation angle etc. of the rotor, a sensor for detecting the rotation of the rotor may be arranged around the central axis when the motor is viewed axially.

[0005] On the other hand, when damage or failure occurs in the sensor and the power supply line, the sensor and the power supply line may need to be replaced. [[ID=...]]

[0006] Here, as in Patent Document 1, if the power supply line (the phase cable) that supplies power to the coil is aligned with the central axis of the motor in the axial direction when viewed in the axial direction, then if the sensor is positioned in a location that axially overlaps with the central axis of the motor as described above, there is a possibility that the sensor and the power supply line will interfere with each other when replacing the sensor and the power supply line. Therefore, in such a motor, a configuration that allows for easy replacement of the power supply line and the sensor is desired.

[0007] The objective of the present invention is to realize a configuration in which the power supply line and the sensor unit can be easily replaced in a motor in which the sensor unit is located at a position that coincides with the central axis of the motor when viewed in the axial direction. [Means for solving the problem]

[0008] A motor according to one embodiment of the present invention includes a rotor that rotates about a central axis, a cylindrical stator having stator coils and extending axially about the central axis radially outward from the rotor, a power supply line electrically connected to the stator coils and supplying power to the stator coils, and a sensor unit for detecting the rotation of the rotor. The sensor unit is located at one axial position relative to the rotor and the stator, and is positioned to coincide with the central axis when the motor is viewed in the axial direction. The power supply line is located at one axial position, radially outward from the sensor unit when the motor is viewed in the axial direction. [Effects of the Invention]

[0009] According to one exemplary embodiment of the present invention, in a motor in which the sensor unit is located at a position that coincides with the central axis of the motor when viewed in the axial direction, a configuration can be realized in which the power supply line and the sensor unit can be easily replaced. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a perspective view of the motor, showing the casing cover separated from the case body, in order to illustrate the schematic configuration of the motor according to Embodiment 1. [Figure 2] Figure 2 is a plan view showing the motor with the cover removed. [Figure 3] Figure 3 is a plan view in which the rotor and stator are shown with solid lines, and the multiple power supply lines, partition plate section, and case body section are shown with dashed lines. [Figure 4] Figure 4 is a partially enlarged cross-sectional view of a motor with the cover attached, cut along the line IV-IV shown in Figure 2. [Figure 5] Figure 5 is a partially enlarged view of the VV line cross-section shown in Figure 2. [Figure 6] Figure 6 is a perspective view of the motor according to Embodiment 2, showing the casing cover separated from the case body. [Figure 7] Figure 7 is a plan view of the motor according to Embodiment 2. [Figure 8] Figure 8 is a partially enlarged view of the section along line VIII-VIII shown in Figure 7. [Modes for carrying out the invention]

[0011] The embodiments of the present invention will be described in detail below with reference to the drawings. Note that identical or corresponding parts in the drawings are denoted by the same reference numerals, and their descriptions will not be repeated. Furthermore, the dimensions of the components in each drawing do not necessarily accurately represent the actual dimensions of the components or their dimensional ratios.

[0012] In the following explanation, the direction parallel to the central axis P of the motor 10 will be referred to as the axial direction, the direction perpendicular to the central axis P will be referred to as the radial direction, and the direction along the arc centered on the central axis P will be referred to as the circumferential direction. In each figure, the axial direction is indicated by A and the circumferential direction by C.

[0013] Furthermore, in the following explanation, expressions such as “fixed,” “connected,” and “attached” include not only cases where components are directly fixed to each other, but also cases where they are fixed to each other via other components. In other words, in the following explanation, expressions such as “fixed” include both direct and indirect fixing of components to each other.

[0014] [Embodiment 1] (Motor) Referring to FIGS. 1 to 5, the motor 10 according to exemplary Embodiment 1 of the present invention will be described. FIG. 1 is a perspective view of the motor 10 showing the cover portion 92 of the casing 90 separated from the case main body portion 91 in order to show the schematic configuration of the motor 10. FIG. 2 is a plan view showing the state where the cover portion 92 is removed from the motor 10. FIG. 3 is a plan view showing the rotor 11 and the stator 16 by solid lines and showing a plurality of power supply lines 20, the partition plate portion 50 and the case main body portion 91 by broken lines. In FIG. 3, the illustration of the sensor unit 30 in FIG. 2 is omitted. FIG. 4 is a partially enlarged cross-sectional view when the motor 10 with the cover portion 92 attached is cut along the line IV-IV shown in FIG. 2. FIG. 5 is a partially enlarged view of the cross-section taken along the line V-V shown in FIG. 2. In FIGS. 3 and 5, the illustration of the cover portion 92 is omitted.

[0015] As shown in FIGS. 1 to 4, the motor 10 includes a rotor 11, a stator 16, a plurality of power supply lines 20, a sensor unit 30, a partition plate portion 50, and a casing 90.

[0016] As shown in FIG. 3, the rotor 11 and the stator 16 can adopt the same configuration as a known inner-rotor type rotor and stator. The rotor 11 rotates about the central axis P. The stator 16 is located radially outward with respect to the rotor 11 and is cylindrical, extending in the axial direction A about the central axis P.

[0017] The stator 16 has a plurality of phase stator coils 18 which are conductors wound around a stator core 17 made of a ferromagnetic material and arranged in the circumferential direction C. In the present embodiment, the stator 16 includes three-phase stator coils (U-phase coil, V-phase coil, and W-phase coil).

[0018] As shown in FIG. 1, the stator coil end portions 18a in the plurality of phase stator coils 18 project in one axial direction A+ of the motor 10. As shown in FIG. 3, the stator coil end portions 18a include a U-phase coil end portion 181 and a V-phase coil end portion 182 located close to each other, and a W-phase coil end portion 183 located away from the U-phase coil end portion 181 and the V-phase coil end portion 182 in the circumferential direction C. In the following description, when it is not necessary to particularly distinguish and describe the U-phase coil end portion 181, the V-phase coil end portion 182, and the W-phase coil end portion 183, they will be described as the stator coil end portion 18a.

[0019] As shown in FIGS. 1 and 2, the plurality of power supply lines 20 respectively supply power to the plurality of phase stator coils 18. In the present embodiment, the plurality of power supply lines 20 include a U-phase power supply line 21, a V-phase power supply line 22, and a W-phase power supply line 23. These three power supply lines extend inward from outside the casing 90. As shown in FIGS. 1 to 3, the plurality of power supply lines 20 are located in one axial direction A+ with respect to the stator 16 and the rotor 11.

[0020] As shown in FIGS. 1 and 2, each of the plurality of power supply lines 20 has a connection portion 28 at one end portion located inside the casing 90. The connection portion 28 electrically connects the plurality of power supply lines 20 and the stator coil end portions 18a of each phase. Although details will be described later, connection portions 281, 282, and 283 located at one ends of the respective power supply lines 21, 22, and 23 are respectively connected to the corresponding coil end portions 181, 182, and 183 of each phase.

[0021] Conductive terminal members M are respectively connected to the other end portions of the plurality of power supply lines 20 located outside the casing 90. External wiring (not shown) for supplying power to the stator coil 18 is connected to the terminal members M. Thereby, power is supplied from the external wiring to the stator coil 18 via the plurality of power supply lines 20. The plurality of power supply lines 20 are insulated from each other by being covered with an insulating coating.

[0022] As shown in Figure 2, the multiple power supply lines 20 are positioned at different locations in the circumferential direction C and radial direction relative to the sensor unit 30, with respect to the motor 10 viewed in the axial direction A. Details of the multiple power supply lines 20 will be described later.

[0023] As shown in Figure 4, the partition plate portion 50 is a flat plate-shaped member that extends in the circumferential direction C between the rotor 11 and stator 16 in the axial direction A and the plurality of power supply lines 20. The plurality of power supply lines 20 are arranged on the axial surface A+ of the partition plate portion 50. The partition plate portion 50 supports the plurality of power supply lines 20 so that they do not come into contact with the stator 16, keeping them away from the stator 16 in the axial direction A. As shown in Figures 1 and 2, the partition plate portion 50 has a through hole portion 52, a protruding portion 55, and a notched portion 58.

[0024] As shown in Figure 1, the through-hole 52 penetrates the partition plate 50 in the axial direction A. The stator coil end 18a of each phase's stator coil 18 passes through the through-hole 52 in the axial direction A. As shown in Figures 1, 2, and 4, the protruding portion 55 is a wall that protrudes in the axial direction A between the multiple power supply lines 20 and the sensor portion E of the sensor unit 30 described later, when the motor 10 is viewed in the axial direction A.

[0025] As shown in Figures 1 and 5, the notch 58 is formed by cutting out a portion of the outer edge of the partition plate 50 in the axial direction A. The temperature sensor 35 of the sensor unit 30, which will be described later, passes through the notch 58 in the axial direction A. Details of the through hole 52, the protrusion 55, and the notch 58 will be described later.

[0026] As shown in Figures 1 and 2, the sensor unit 30 detects and outputs information regarding the rotation of the motor 10 and the temperature of the stator coil 18. The sensor unit 30 is installed on one axial side A+ of the partition plate 50. The sensor unit 30 includes a rotation sensor 31, a control board 32, a temperature sensor 35, a signal line 38, and a connector 39.

[0027] The rotation sensor 31 acquires information regarding the rotation angle of the motor 10. The temperature sensor 35 acquires information regarding the temperature of the stator coil 18. The rotation sensor 31 and the temperature sensor 35 can employ configurations similar to those of known rotation sensors and temperature sensors. For example, the rotation sensor may be a Hall sensor or a resolver. For example, the temperature sensor may be a thermistor or a thermocouple. The rotation sensor 31 and the temperature sensor 35 are connected to the control board 32 so as to be able to transmit signals.

[0028] The control board 32 converts the information acquired by the rotation sensor 31 and the temperature sensor 35 into electrical signals. The signal line 38 is connected to the control board 32 and the connector 39 so as to be able to transmit signals. An external device (not shown) is connected to the connector 39. The control board 32 outputs the electrical signals to the external device connected to the connector 39 via the signal line 38.

[0029] The rotation sensor 31 and the control board 32 correspond to the sensor unit E. The positional relationship between the sensor unit E, the temperature sensor 35, and the signal line 38 will be described later.

[0030] The casing 90 is a container that covers the rotor 11, the stator 16, the partition plate portion 50, the sensor unit 30 other than the connector 39, and a portion of the multiple power supply lines 20. The casing 90 has a case body portion 91 and a cover portion 92.

[0031] The case body 91 covers the radially outward sides of the rotor 11 and stator 16, and the other axial side A- of the rotor 11 and stator 16. The case body 91 is a bottomed cylindrical shape that opens in the axial direction A+. The case body 91 houses the rotor 11, the stator 16, the partition plate 50, the sensor unit 30 other than the connector 39, and the multiple power supply lines 20.

[0032] The case body 91 has a first projection 911 and a second projection 912 that protrude radially at different positions in the circumferential direction C when viewed from the motor 10 in the axial direction A. Multiple power supply lines 20 pass radially through the first projection 911. A connector 39 passes radially through the second projection 912.

[0033] The cover portion 92 is a lid that covers one axial direction A+ of the rotor 11 and stator 16. The cover portion 92 is flat. The cover portion 92 is configured to be detachable from the case body portion 91.

[0034] The cover portion 92 is located on one axial side A+ relative to the case body portion 91 and covers the opening of the partition plate portion 50 in the axial direction A. Therefore, the cover portion 92 is positioned to cover at least the portion of the power supply line 20 located on the partition plate portion 50 and the protruding portion 55 in the axial direction A.

[0035] The cover portion 92 has two protrusions 92a and 92b that overlap the first protrusion 911 and the second protrusion 912 of the case body portion 91 in the axial direction A. The two protrusions 92a and 92b cover the first protrusion 911 and the second protrusion 912, respectively, in the axial direction A.

[0036] (Positional relationship between multiple power supply lines, partition plates, and sensor units) Next, with reference to Figures 1, 2, and 5, the detailed configuration of the motor 10, including the multiple power supply lines 20, the partition plate section 50, and the sensor unit 30, and their relative positional relationships will be described. The sensor section E, including the rotation sensor 31 and the control board 32, is positioned to overlap with the central axis P of the motor 10 when viewed in the axial direction A.

[0037] (Multiple power lines) As shown in Figure 2, the multiple power supply lines 20 penetrate the first projection 911 of the case body 91 from outside the casing 90 toward the inside of the casing 90. Furthermore, each of the multiple power supply lines 20 is positioned radially outward from the sensor section E when the motor 10 is viewed in the axial direction A. Specifically, the multiple power supply lines 20 are positioned radially outward on the partition plate 50 located in the axial direction A+ relative to the rotor 11 and stator 16 inside the casing 90, with the sensor section E in between when the motor 10 is viewed in the axial direction A.

[0038] As described above, the multiple power supply lines 20 include a U-phase power supply line 21, a V-phase power supply line 22, and a W-phase power supply line 23. The U-phase power supply line 21 and the V-phase power supply line 22 are power supply lines that are located on one radial side relative to the sensor part E when the motor 10 is viewed in the axial direction A, and extend in one circumferential direction C+. The W-phase power supply line 23 is located on the other radial side relative to the sensor part E when the motor 10 is viewed in the axial direction A, and extends in the other circumferential direction C-. The U-phase power supply line 21 and the V-phase power supply line 22 are arranged radially within the casing 90 when the motor 10 is viewed in the axial direction A.

[0039] The U-phase power supply line 21 is connected to the U-phase coil end 181 via a connector 281. Similarly, the V-phase power supply line 22 is connected to the V-phase coil end 182 via a connector 282. The W-phase power supply line 23 is connected to the W-phase coil end 183 via a connector 283. The connectors 281, 282, and 283 are located radially outward of the sensor section E when the motor 10 is viewed in the axial direction A.

[0040] Each of the power supply lines 21, 22, and 23 will be described in more detail. The U-phase power supply line 21 has a U-phase power supply line main body 21a and a U-phase radial extension 21b. The V-phase power supply line 22 has a V-phase power supply line main body 22a and a V-phase radial extension 22b. The W-phase power supply line 23 has a W-phase power supply line main body 23a and a W-phase radial extension 23b.

[0041] The U-phase power supply line body 21a and the V-phase power supply line body 22a extend radially outward from the sensor section E and in the circumferential direction C when the motor 10 is viewed in the axial direction A. The U-phase power supply line body 21a and the V-phase power supply line body 22a are aligned radially.

[0042] The V-phase power supply line body 22a is located radially inward relative to the U-phase power supply line body 21a. In other words, of the U-phase power supply line body 21a and V-phase power supply line body 22a, which are aligned radially, the V-phase power supply line body 22a is located furthest radially inward.

[0043] The W-phase power supply line body 23a is located radially outward from the sensor section E when the motor 10 is viewed in the axial direction A, and extends in the circumferential direction C at a different position from the U-phase power supply line body 21a and the V-phase power supply line body 22a in the circumferential direction C. In other words, the W-phase power supply line body 23a, the U-phase power supply line body 21a and the V-phase power supply line body 22a are located radially between the sensor section E when the motor 10 is viewed in the axial direction A.

[0044] The aforementioned connection portion 281 is formed at one end of the U-phase power supply line main body 21a. The aforementioned connection portion 282 is formed at one end of the V-phase power supply line main body 22a. The U-phase radial extension portion 21b extends radially outward from the other end of the U-phase power supply line main body 21a. The V-phase radial extension portion 22b extends radially outward from the other end of the V-phase power supply line main body 22a.

[0045] The aforementioned connection portion 283 is formed at one end of the W-phase power supply line main body portion 23a. The W-phase radial extension portion 23b extends radially outward from the other end of the W-phase power supply line main body portion 23a.

[0046] The U-phase radially extended portion 21b, the V-phase radially extended portion 22b, and the W-phase radially extended portion 23b each extend in one radial direction and are aligned in the circumferential direction C. As shown in Figures 1 and 2, the first projection 911 of the case body portion 91 has three first projection through holes H that penetrate the first projection 911 radially and are aligned in the circumferential direction C. As shown in Figure 2, the U-phase radially extended portion 21b, the V-phase radially extended portion 22b, and the W-phase radially extended portion 23b each penetrate the first projection through holes H. As a result, the U-phase radially extended portion 21b, the V-phase radially extended portion 22b, and the W-phase radially extended portion 23b are arranged aligned in the circumferential direction C.

[0047] Conductive terminal members M are connected to the ends of the U-phase radial extension portion 21b, the V-phase radial extension portion 22b, and the W-phase radial extension portion 23b. In this embodiment, the terminal members M are arranged in the circumferential direction C. This makes it easy to connect external wiring for supplying power to the stator coil 18 to the terminal members M.

[0048] Here, the U-phase power supply line 21, including the U-phase power supply line main body 21a, and the V-phase power supply line 22, including the V-phase power supply line main body 22a, correspond to the first power supply line. The W-phase power supply line 23, including the W-phase power supply line main body 23a, corresponds to the second power supply line. The U-phase power supply line main body 21a and the V-phase power supply line main body 22a correspond to the first power supply line main body. The W-phase power supply line main body 23a corresponds to the second power supply line main body. The U-phase radial extension section 21b and the V-phase radial extension section 22b correspond to the first radial extension section. The W-phase radial extension section 23b corresponds to the second radial extension section.

[0049] (Partition plate section) The partition plate portion 50 covers a part of the stator 16 when the motor 10 is viewed in the axial direction A. As previously described, the partition plate portion 50 has a through hole portion 52, a protruding portion 55, and a notched portion 58.

[0050] The notch 58 of the partition plate 50 is located in a position where it overlaps with the U-phase radial extension 21b, the V-phase radial extension 22b, and the W-phase radial extension 23b when the motor 10 is viewed in the axial direction A. The stator coil 18 is also exposed in the notch 58. When the motor 10 is viewed in the axial direction A, the notch 58 is located where the multiple power supply lines 20 and the stator coil 18 overlap.

[0051] The through-hole portion 52 has a first through-hole portion 521 and a second through-hole portion 522. The first through-hole portion 521 and the second through-hole portion 522 are each located radially outward from the sensor portion E when viewed from the motor 10 in the axial direction A. The first through-hole portion 521 and the second through-hole portion 522 are located at different positions in the circumferential direction C when viewed from the motor 10 in the axial direction A.

[0052] The first through-hole 521 is through which the U-phase coil end 181 connected to the U-phase power supply line 21 and the V-phase coil end 182 connected to the V-phase power supply line 22 pass. The second through-hole 522 is through which the W-phase coil end 183 connected to the W-phase power supply line 23 passes.

[0053] Thus, the first through-hole 521 through which the U-phase coil end 181 and the V-phase coil end 182 pass, and the second through-hole 522 through which the W-phase coil end 183 passes, are located radially outward of the sensor section E when the motor 10 is viewed in the axial direction A, and are positioned at different locations in the circumferential direction C relative to each other. This allows multiple power supply lines 20 to be arranged without overlapping the sensor section E when the motor 10 is viewed in the axial direction A.

[0054] The protruding portion 55 of the partition plate portion 50 has a first protruding portion 551 and a second protruding portion 552. The first protruding portion 551 is located between the U-phase power supply line main portion 21a and the V-phase power supply line main portion 22a and the sensor portion E when the motor 10 is viewed in the axial direction A. The second protruding portion 552 is located between the W-phase power supply line main portion 23a and the sensor portion E when the motor 10 is viewed in the axial direction A.

[0055] As a result, the first protrusion 551 prevents the U-phase power supply line body 21a and the V-phase power supply line body 22a from moving radially toward the sensor section E. In addition, the second protrusion 552 prevents the W-phase power supply line body 23a from moving radially toward the sensor section E.

[0056] Furthermore, the portions of the multiple power supply lines 20 located on the partition plate portion 50 and the protruding portions 55 are covered in the axial direction A by the cover portion 92 of the casing 90. That is, the cover portion 92 is positioned to overlap with at least the U-phase power supply line main portions 21a, V-phase power supply line main portions 22a and W-phase power supply line main portions 23a, as well as the first protruding portion 551 and the second protruding portion 552, which are located on the partition plate portion 50 of the multiple power supply lines 20, when viewed in the axial direction A. Thus, it is possible to restrict each power supply line main portion 21a, 22a, and 23a from moving in one axial direction A+.

[0057] Furthermore, as shown in Figure 4, the shortest distance G1 in the axial direction A between the protruding tip 55a of the protruding portion 55 and the cover portion 92 is smaller than the shortest distance G2 in the axial direction A between the surface 50a of the partition plate portion 50 where each power supply line body portion 21a, 22a, 23a is located and the cover portion 92. This prevents the power supply line 20 from moving radially inward through the space between the protruding portion 55 and the cover portion 92 in the axial direction A.

[0058] The first protrusion 551 and the second protrusion 552 are located at different positions in the circumferential direction C when viewed from the motor 10 in the axial direction A. A signal line 38 extends radially between the other circumferential C- end of the first protrusion 551 and the one circumferential C+ end of the second protrusion 552. A temperature sensor 35 extends radially between the one circumferential C+ end of the first protrusion 551 and the other circumferential C- end of the second protrusion 552.

[0059] (Sensor unit) The sensor unit E is installed on the partition plate 50 and is positioned so as to coincide with the central axis P of the motor 10 when viewed in the axial direction A. The sensor unit E is positioned radially at different positions relative to the stator coil ends 18a of each phase's stator coil 18 and the multiple power supply lines 20.

[0060] The signal line 38 extends radially outward from the sensor unit E at a position different from the multiple power supply lines 20, the U-phase coil end 181, the V-phase coil end 182, and the W-phase coil end 183, when the motor 10 is viewed in the axial direction A. Specifically, the signal line 38 extends radially between one circumferential C+ end of the V-phase coil end 182 and the other circumferential C- end of the W-phase coil end 183, when the motor 10 is viewed in the axial direction A.

[0061] With the above configuration, when replacing the signal line 38, interference between the signal line 38 and the U-phase coil end 181, the V-phase coil end 182, the W-phase coil end 183, and the multiple power supply lines 20 can be prevented. Furthermore, when replacing at least one of the multiple power supply lines 20, interference between the at least one power supply line and the signal line 38 can be prevented.

[0062] The temperature sensor 35 has a temperature measuring unit 36 ​​and a temperature sensor signal line 37. The temperature measuring unit 36 ​​is located at the end of the temperature sensor signal line 37 and measures the temperature of the stator coil 18. The temperature sensor signal line 37 is connected to the control board 32 of the sensor unit E and the temperature measuring unit 36 ​​so as to be able to transmit signals.

[0063] The temperature sensor signal line 37 extends radially from the control board 32 of the sensor unit E toward the space between the V-phase radial extension 22b and the W-phase radial extension 23b. As shown in Figure 5, the temperature sensor signal line 37 passes through the notch 58 at a position between the V-phase radial extension 22b and the W-phase radial extension 23b when the motor 10 is viewed in the axial direction A. The temperature measuring unit 36 ​​is attached to the outer surface of the stator coil 18, which is located between the V-phase radial extension 22b and the W-phase radial extension 23b when the motor 10 is viewed in the axial direction A. This allows the temperature of the stator coil 18 at a position where multiple power supply lines 20 and the stator coil 18 overlap when the motor 10 is viewed in the axial direction A to be measured by the temperature measuring unit 36 ​​of the temperature sensor 35.

[0064] The temperature sensor signal line 37 is positioned so as not to overlap with the signal line 38 when the motor 10 is viewed in axial direction A. Therefore, when replacing the signal line 38, interference between the signal line 38 and the temperature sensor signal line 37 can be prevented. Similarly, when replacing the temperature sensor 35, interference between the temperature sensor signal line 37 and the signal line 38 can be prevented.

[0065] The motor 10 according to this embodiment includes a rotor 11 that rotates about a central axis P, a cylindrical stator 16 having a stator coil 18 and extending in the axial direction A about the central axis P radially outward from the rotor 11, a power supply line 20 electrically connected to the stator coil 18 and supplying power to the stator coil 18, and a sensor unit E that detects the rotation of the rotor 11. The sensor unit E is located at a position A+ in the axial direction relative to the rotor 11 and stator 16, and is positioned to coincide with the central axis P when the motor 10 is viewed in the axial direction A. The power supply line 20 is located at a position A+ in the axial direction, and is radially outward from the sensor unit E when the motor 10 is viewed in the axial direction A.

[0066] According to the above configuration, with the motor 10 viewed in the axial direction A, the power supply line 20 that supplies power to the stator coil 18 is located radially outward from the sensor unit E that detects the rotation of the rotor 11. This allows the sensor unit E and the power supply line 20 to be easily attached to and detached from the motor 10 without interfering with each other. Therefore, the workability when replacing at least one of the sensor unit E and the power supply line 20 can be improved. Thus, a configuration can be realized in which at least one of the power supply line 20 and the sensor unit E can be easily replaced.

[0067] The motor 10 according to this embodiment 1 further has a plate-shaped partition plate portion 50 that covers a part of the stator 16 and is located between the power supply line 20 and the stator 16 when the motor 10 is viewed in the axial direction A. The partition plate portion 50 has a protruding portion 55 that protrudes in the axial direction A between the power supply line 20 and the sensor portion E when the motor 10 is viewed in the axial direction A.

[0068] According to the above configuration, even if vibrations occur in the motor 10, the protrusion 55 of the partition plate 50 can restrict the radial movement of the power supply line 20 toward the sensor unit E. Therefore, it is possible to prevent the power supply line 20 and the sensor unit E from overlapping in the axial direction A. Consequently, even in motors 10 used in environments where the power supply line 20 may move due to vibrations, at least one of the sensor unit E and the power supply line 20 can be easily replaced.

[0069] In the motor 10 according to this embodiment 1, the partition plate portion 50 has a through-hole portion 52 through which the stator coil end 18a of the stator coil 18, which is electrically connected to the power supply line 20, passes. The through-hole portion 52 is located radially outward of the sensor portion E when the motor 10 is viewed in the axial direction A.

[0070] According to the above configuration, the stator coil end 18a of the stator coil 18, which is electrically connected to the power supply line 20, passes through the through-hole 52 of the partition plate 50 located radially outward from the sensor unit E. This allows the power supply line 20 to be positioned more reliably radially outward from the sensor unit E when viewed in the axial direction A of the motor 10. Therefore, it is possible to more reliably prevent the power supply line 20 from overlapping with the sensor unit E in the axial direction A.

[0071] In the motor 10 according to this embodiment 1, the power supply line 20 has a connection portion 28 at one end that is electrically connected to the stator coil end 18a of the stator coil 18. The connection portion 28 is located radially outward of the sensor portion E when the motor 10 is viewed in the axial direction A.

[0072] With the above configuration, the connection portion 28 is located radially outward from the sensor portion E, which facilitates the connection and disconnection of the power supply line 20 and the stator coil 18. Therefore, a motor 10 is provided that allows for easier replacement of the power supply line 20.

[0073] The motor 10 according to this embodiment 1 further has a signal line 38 for outputting a signal from the sensor unit E. The signal line 38 extends radially outward from the sensor unit E at a different position from the power supply line 20 when the motor 10 is viewed in the axial direction A.

[0074] According to the above configuration, the signal line 38 extends radially outward from the sensor unit E at a different position from the power supply line 20 when the motor 10 is viewed in the axial direction A. Therefore, since the signal line 38 and the power supply line 20 are located in positions where they do not intersect with each other, the work of replacing the signal line 38, the sensor unit E, and the power supply line 20 can be easily performed.

[0075] In the motor 10 according to this embodiment 1, the stator 16 has stator coils 18 of multiple phases. The motor 10 has multiple power supply lines 20, each having one end connected to one of the stator coils 18 of the multiple phases, and located radially outward from the sensor section E when the motor 10 is viewed in the axial direction A. The multiple power supply lines 20 include U-phase power supply lines 21 and V-phase power supply lines 22, which extend in the circumferential direction C around the central axis P and include U-phase power supply line main sections 21a and V-phase power supply line main sections 22a, and W-phase power supply lines 23, which extend in the circumferential direction C and are located at different positions in the circumferential direction C and radial direction relative to the U-phase power supply line main sections 21a and V-phase power supply line main sections 22a.

[0076] According to the above configuration, the main bodies 21a and 22a of the U-phase power supply line 21 and V-phase power supply line 22, and the main body 23a of the W-phase power supply line 23 can be arranged at positions different from the sensor unit E when the motor 10 is viewed in the axial direction A, and separated from each other in the circumferential direction C. Therefore, by utilizing the space radially outward of the sensor unit E, the multiple power supply lines 20 can be wired more easily so that they do not overlap the sensor unit E in the axial direction A. Thus, the replacement work of the multiple power supply lines 20 and the sensor unit E can be made easier.

[0077] In the motor 10 according to this embodiment 1, the U-phase power supply line 21 includes a U-phase radial extension portion 21b that extends radially from the end of the U-phase power supply line main body portion 21a, with the motor 10 viewed in the axial direction A. The V-phase power supply line 22 includes a V-phase radial extension portion 22b that extends radially from the end of the V-phase power supply line main body portion 22a, with the motor 10 viewed in the axial direction A. The W-phase power supply line 23 includes a W-phase radial extension portion 23b that extends radially from the end of the W-phase power supply line main body portion 23a, with the motor 10 viewed in the axial direction A. The U-phase radial extension portion 21b, the V-phase radial extension portion 22b, and the W-phase radial extension portion 23b are aligned with each other in the circumferential direction C.

[0078] According to the above configuration, the U-phase radial extensions 21b and V-phase radial extensions 22b and the W-phase radial extension 23b extend radially outward from each end of the U-phase power supply line main body 21a and the V-phase power supply line main body 22a and the end of the W-phase power supply line main body 23a, respectively, and are arranged in the circumferential direction C.

[0079] This allows the U-phase power supply line main body 21a, V-phase power supply line main body 22a, and W-phase power supply line main body 23a to be arranged so as not to interfere with the sensor unit E, while the U-phase radial extension section 21b, V-phase radial extension section 22b, and W-phase radial extension section 23b can be arranged compactly. Thus, the U-phase power supply line 21, V-phase power supply line 22, and W-phase power supply line 23 can be arranged compactly while preventing interference with the sensor unit E.

[0080] The motor 10 according to this embodiment 1 includes a temperature sensor signal line 37 and further has a temperature sensor 35 for measuring the temperature of the stator coil 18. The temperature sensor signal line 37 extends radially from the sensor part E toward the space between the V-phase radial extension part 22b and the W-phase radial extension part 23b when the motor 10 is viewed in the axial direction A.

[0081] According to the above configuration, the signal line 37 for the temperature sensor extends radially from the sensor unit E towards the area between the V-phase radial extension section 22b and the W-phase radial extension section 23b, which are locations where multiple power supply lines 20 and the stator coil 18 converge.

[0082] This allows the temperature of the high-temperature parts of the stator coil 18 during motor 10 operation to be measured by the temperature sensor 35. Furthermore, since the temperature sensor signal line 37 and the V-phase power supply line 22 and W-phase power supply line 23 are located in positions where they do not intersect with each other, the temperature sensor 35, V-phase power supply line 22, and W-phase power supply line 23 can be easily attached to and detached from the motor 10. Thus, a motor 10 can be provided that can accurately detect the temperature of the stator coil 18 of the motor 10, and that makes it easy to replace the temperature sensor 35 and the multiple power supply lines 20.

[0083] The motor 10 according to this embodiment 1 has a casing 90 which includes a bottomed cylindrical case body 91 that houses the rotor 11, stator 16 and partition plate portion 50 and opens in one axial direction A+, and a cover portion 92 that covers the opening of the case body 91. The cover portion 92 is positioned so as to overlap with at least the portion of the power supply line 20 located on the partition plate portion 50 and the protruding portion 55 when viewed in the axial direction A.

[0084] According to the above configuration, the cover portion 92 that covers the opening of the case body portion 91 can restrict the movement of the power supply line 20, which is located on the partition plate portion 50 housed inside the case body portion 91, in the axial direction A+. Furthermore, the cover portion 92 can restrict the radial movement of the power supply line 20 by passing between the protruding tip portion 55a of the protruding portion 55 of the partition plate portion 50 and the cover portion 92. This prevents the power supply line 20 from overlapping with the sensor portion E, which is located radially inward from the protruding portion 55, in the axial direction A.

[0085] [Embodiment 2] A motor 110 according to an exemplary embodiment 2 of the present invention will be described with reference to Figures 6 to 8. Figure 6 is a perspective view of the motor 110 according to embodiment 2, showing the cover portion 192 of the casing 190 separated from the case body portion 91. Figure 7 is a plan view of the motor 110. Figure 8 is a partially enlarged view of the cross section along line VIII-VIII shown in Figure 7. As shown in Figures 6 and 7, in this embodiment, the cover portion 192 of the casing 190 has a cover projection 193 in the radially central portion. In the following, components identical to those in embodiment 1 are denoted by the same reference numerals and their descriptions are omitted, while components different from those in embodiment 1 are described. Also, in the following, the configuration of the first projection 551 for the U-phase power supply line 21 and the V-phase power supply line 22, and the configuration of the second projection 552 for the W-phase power supply line 23 are the same. Therefore, unless particularly necessary, these components will not be described separately. In other words, the U-phase power supply line 21, the V-phase power supply line 22, and the W-phase power supply line 23 are simply described as multiple power supply lines 20, and the first protrusion 551 and the second protrusion 552 are simply described as protrusion 55.

[0086] As shown in Figures 6 to 8, the casing 190 has a case body portion 91 and a cover portion 192.

[0087] The cover portion 192 is a circular, flat plate. As shown in Figure 8, the outer edge portion 192a of the cover portion 192 is in contact with one axial end A+ of the case body portion 91 in the axial direction A. As a result, the position of the cover portion 192 in the axial direction A is positioned at a predetermined position relative to the case body portion 91.

[0088] Furthermore, the outer peripheral end of the cover portion 192 protrudes in the other axial direction A- along the overall outer shape of the case body portion 91, including the two protrusions 92a and 92b. This allows the radial and circumferential position of the cover portion 192 relative to the case body portion 91 while the cover portion 192 covers the opening of the case body portion 91.

[0089] The radially central portion of the cover portion 192 protrudes in the other axial direction A-. That is, the cover portion 192 has a cover projection 193 and a cover flat portion 194. The cover flat portion 194 is plate-shaped and surrounds the cover projection 193, and is located radially outward of the cover portion 192 relative to the cover projection 193.

[0090] The cover projection 193 is located in the radial center of the cover portion 192, at a position that coincides with the central axis P when viewed in the axial direction A, and protrudes in the other axial direction A- relative to the cover flat portion 194. One axial side of the cover projection 193 is recessed. The cover projection 193 is circular when viewed in the axial direction A. The cover projection 193 covers the radial inner portion 50c and the annular stepped portion 50d of the partition plate portion 50, which will be described later, in the axial direction A.

[0091] As described above, the cover projection 193 protrudes in the other axial direction A- relative to the cover flat surface 194, thereby increasing the rigidity of the cover portion 192. Therefore, the rigidity of the cover portion 192 can be increased by having the cover projection 193 with the above configuration.

[0092] Here, as shown in Figures 6 to 8, the partition plate portion 50 has a radially outer portion 50b, a circular radially inner portion 50c located radially inward from the radially outer portion 50b and recessed in the other axial direction A- relative to the radially outer portion 50b, a stepped portion 50d, and a protruding portion 55. Multiple power supply lines 20 are arranged on the radially outer portion 50b of the partition plate portion 50. A sensor portion E is arranged on the radially inner portion 50c of the partition plate portion 50. The stepped portion 50d is located between the radially outer portion 50b and the radially inner portion 50c and is annular when viewed in the axial direction A. The protruding portion 55 protrudes in the axial direction A+ from a part of the circumferential direction of the stepped portion 50d. The protruding portion 55 extends along the stepped portion 50d in an arc shape centered on the central axis P.

[0093] Therefore, the cover projection 193 covers the sensor portion E, which is located radially inward from the protruding portion 55, in the axial direction A. The cover flat portion 194 covers the radially outer portion 50b of the partition plate portion 50 and the first projection 911 and the second projection 912 of the case body portion 91, in the axial direction A. Therefore, the cover flat portion 194 covers the multiple power supply lines 20 located on the radially outer portion 50b of the partition plate portion 50 in the axial direction A.

[0094] The cover projection 193 has a side wall portion 195 and a bottom portion 196. The side wall portion 195 corresponds to the side portion of the present invention.

[0095] The side wall portion 195 is cylindrical and extends from the cover flat portion 194 in the other axial direction A-. The bottom portion 196 is circular when viewed in the axial direction A and closes the other axial end A- of the side wall portion 195. The bottom portion 196 constitutes the tip portion of the cover projection 193.

[0096] As shown in Figure 7, in this embodiment, the cover projection 193 is positioned to overlap with the projection 55 of the partition plate 50 when viewed in the axial direction A. Specifically, a portion of the side wall 195 of the cover projection 193 overlaps with the projection 55 in the axial direction A.

[0097] In other words, the cover projection 193 has a side wall portion 195 extending from the cover flat portion 194 in the other axial direction A-, and a bottom portion 196 connected to the other axial side of the side wall portion 195 and constituting the tip portion of the cover projection 193. At least a part of the side wall portion 195 overlaps with the projection 55 when the motor 110 is viewed in the axial direction A.

[0098] As shown in Figure 8, components such as multiple power supply lines 20 are arranged on the radially outer portion 50b of the partition plate portion 50. In other words, multiple power supply lines 20 are housed in the region radially outward from the protruding portion 55 of the partition plate portion 50. With the above configuration, for example, compared to the case where the side wall portion of the cover projection is arranged to overlap radially outward from the protruding portion of the partition plate portion rather than the protruding portion, it is possible to prevent the cover projection 193 from protruding significantly into the region radially outward from the protruding portion 55. Therefore, space can be secured within the region to house multiple power supply lines 20.

[0099] As shown in Figure 8, the side wall portion 195 of the cover projection 193 has a projection height such that the bottom portion 196 does not come into contact with the projection 55 of the partition plate portion 50. For this reason, the bottom portion 196 of the cover projection 193 is spaced apart from the projection 55 in the axial direction A.

[0100] The shortest distance G101 in the axial direction A between the protruding tip 55a of the protruding portion 55 and the cover flat portion 194 is smaller than the shortest distance G102 in the axial direction A between the surface 50a of the partition plate portion 50 on which the multiple power supply lines 20 are arranged and the cover flat portion 194. This restricts the multiple power supply lines 20 from moving radially inward beyond the protruding portion 55.

[0101] Furthermore, in this embodiment, the shortest distance G103 in the axial direction A between the protruding tip 55a of the protruding portion 55 and the bottom 196 of the cover projection 193 is smaller than the shortest distance G101 in the axial direction A between the protruding tip 55a of the protruding portion 55 and the cover flat portion 194. In this embodiment, the bottom 196 of the cover projection 193 and the protruding tip 55a of the protruding portion 55 are closest to each other in the axial direction A. Therefore, in this embodiment, the shortest distance G103 is the shortest distance between the cover portion 192 and the protruding portion 55.

[0102] The shortest distance refers to the distance between the contact points of the cover and the protruding part when they are in contact. In other words, when the cover and the protruding part are in contact, the shortest distance is zero. When the cover and the protruding part are separated, the shortest distance refers to the distance between the closest points of the cover and the protruding part.

[0103] In this embodiment, the shortest distance G103 between the bottom 196 of the cover projection 193 and the protruding tip 55a of the projection 55 is smaller than the minimum cross-sectional width W of the portion of the multiple power supply lines 20 located on the partition plate portion 50. That is, the shortest distance G103 is smaller than the minimum cross-sectional width W of the main body portions 21a, 22a, and 23a of each phase of the power supply lines.

[0104] Here, the cross-section of the power supply line 20 refers to the cross-section of the power supply line body 21a, 22a, 23a of each phase in a direction perpendicular to the direction in which the power supply line extends. The minimum width W refers to the shortest width in the cross-section. For example, if the cross-section is circular, the minimum width W is the diameter. For example, if the cross-section is elliptical, the minimum width W is the minor axis. The cross-section may have a shape other than a circle. For example, if the cross-section is rectangular, the minimum width W is the short side. In this embodiment, since the cross-section of the power supply line 20 is circular, the minimum width W is the diameter of the power supply line 20. Therefore, the shortest distance G103 is smaller than the diameter of the cross-section of the power supply line body 21a, 22a, 23a of each phase.

[0105] As described above, in the motor 110 according to this second embodiment, the shortest distance G103 between the cover portion 192 and the protruding portion 55 is smaller than the minimum width W of the portion of the power supply line 20 located on the partition plate portion 50. This makes it possible to more reliably prevent the power supply line 20 from passing radially between the protruding portion 55 of the partition plate portion 50 and the cover portion 192. Therefore, it is possible to more reliably prevent the power supply line 20 from overlapping with the sensor portion E in the axial direction A.

[0106] Furthermore, in this embodiment, the cover portion 192 has a plate-shaped cover flat portion 194 and a cover projection 193 that protrudes from the cover flat portion 194 in the other axial direction A-. The cover projection 193 is spaced apart from the projection 55.

[0107] This prevents the power supply line 20 from passing radially beyond the protrusion 55 of the partition plate portion 50 or the cover projection 193 of the cover portion 192, while also preventing the cover projection 193 from contacting the protrusion 55. Therefore, it is possible to prevent the power supply line 20 from overlapping with the sensor portion E in the axial direction A, while also preventing the cover portion 192 from contacting the case body portion 91 and shifting from its predetermined mounting position. Moreover, the cover projection 193 increases the axial rigidity of the cover portion 192 compared to a cover portion without the cover projection 193.

[0108] Furthermore, in this embodiment, at least a portion of the cover projection 193 overlaps with the projection 55 when the motor 110 is viewed in the axial direction A. This more reliably prevents the power supply line 20 from passing radially between the projection 55 and the cover projection 193. Thus, it is more reliably possible to prevent the power supply line 20 from overlapping with the sensor unit E in the axial direction A.

[0109] (Other embodiments) Although embodiments of the present invention have been described above, the embodiments described above are merely examples for carrying out the present invention. Therefore, the invention is not limited to the embodiments described above, and it is possible to carry out the invention by appropriately modifying the embodiments described above without departing from the spirit of the invention.

[0110] In each of the above embodiments, the motors 10 and 110 have three power supply lines 20 connected to the stator coil ends 18a of the three-phase stator coil 18. Specifically, the motors 10 and 110 have a U-phase power supply line 21, a V-phase power supply line 22, and a W-phase power supply line 23. However, the motor may have stator coil ends with two or fewer phases or four or more phases. The motor may have two or fewer power supply lines or four or more connected to the ends of the stator coil.

[0111] In each of the above embodiments, the U-phase radially extended portion 21b, the V-phase radially extended portion 22b, and the W-phase radially extended portion 23b are each aligned in the circumferential direction C. The first projection 911 of the case body portions 91,191 has three first projection through-holes H through which the U-phase radially extended portion 21b, the V-phase radially extended portion 22b, and the W-phase radially extended portion 23b pass, aligned in the circumferential direction C. However, the U-phase radially extended portion, the V-phase radially extended portion, and the W-phase radially extended portion may each extend in different directions in the radial direction.

[0112] In each of the embodiments described above, the terminal members M connected to the ends of the U-phase radial extension portion 21b, the V-phase radial extension portion 22b, and the W-phase radial extension portion 23b are arranged in the circumferential direction C. However, the terminal members do not have to be arranged in the circumferential direction. Also, the lengths of the U-phase radial extension portion, the V-phase radial extension portion, and the W-phase radial extension portion may be different.

[0113] In each of the above embodiments, the multiple power supply lines are located radially outward on the partition plate portion 50, which is located on one axial side A+ relative to the rotor 11 and stator 16 within the casings 90 and 190, with respect to the motors 10 and 110 in the axial direction A, with the sensor portion E in between. However, the multiple power supply lines may be arranged in any way on one axial side of the motor, as long as they are positioned so that the multiple power supply lines and the sensor portion do not overlap when viewed in the axial direction of the motor. For example, all the power supply lines may be arranged radially outward from the sensor portion when viewed in the axial direction of the motor.

[0114] In each of the above embodiments, the stator coil ends 18a of the multi-phase stator coil 18 include U-phase coil ends 181 and V-phase coil ends 182 located close to each other, and W-phase coil ends 183 located at a distance in the circumferential direction C from the U-phase coil ends 181 and V-phase coil ends 182. However, the stator coil ends of the multi-phase stator coil may be arranged in any way as long as they are located at different positions in at least one of the circumferential and radial directions.

[0115] In each of the above embodiments, the stator coil end 18a of the stator coil 18 of each phase passes through the through hole 52 in the axial direction A. However, multiple power supply lines connected to the ends of the stator coils of each phase may also pass through the through hole in the axial direction.

[0116] In each of the above embodiments, the partition plate portion 50 has a through hole portion 52 through which the stator coil end portion 18a of the stator coil 18 of each phase passes. However, the partition plate portion does not need to have a through hole portion as long as it is configured to allow connection between the stator coil end portion and the power supply line. For example, the power supply line may be passed through the gap between the partition plate portion and the case body portion, and the stator coil end portion may be connected to the power supply line.

[0117] In the above embodiment 1, the motor 10 has a partition plate portion 50. The partition plate portion 50 covers a part of the stator 16 when the motor 10 is viewed in the axial direction A. However, the partition plate portion only needs to cover at least a part of the stator when the motor is viewed in the axial direction, as long as the stator coil end and the power supply line can be connected to it. The partition plate may cover the entire stator when the motor is viewed in the axial direction. The motor does not need to have a partition plate portion.

[0118] In each of the above embodiments, the sensor unit 30 detects and outputs information regarding the rotation of the motors 10 and 110 and the temperature of the stator coil 18. The sensor unit 30 includes a rotation sensor 31 and a temperature sensor 35. However, the sensor unit may have other sensors. For example, the sensor unit may further include a current sensor, a vibration sensor, etc. The sensor unit may not have a temperature sensor.

[0119] In each of the above embodiments, the signal line 38 extends radially outward from the sensor unit E at a position different from the multiple power supply lines 20, the U-phase coil end 181, the V-phase coil end 182, and the W-phase coil end 183. The temperature sensor signal line 37 extends radially from the control board 32 of the sensor unit E toward the space between the V-phase radial extension 22b and the W-phase radial extension 23b. However, the signal line and the temperature sensor signal line may be wired anywhere as long as they are located at different positions in the radial and circumferential directions relative to the multiple power supply lines and the stator coil ends of each phase when viewed from the axial direction of the motor.

[0120] In each of the above embodiments, the temperature measuring unit 36 ​​is attached to the outer surface of the stator coil 18 located between the V-phase radial extension portion 22b and the W-phase radial extension portion 23b in the circumferential direction C. However, the temperature measuring unit may be located anywhere as long as it can measure the temperature of the stator coil. For example, it may be attached to the outer surface of the stator coil at a position different from the space between the V-phase radial extension portion and the W-phase radial extension portion when viewing the motor in the axial direction. The temperature measuring unit may be located between the stator coil and a plurality of power supply lines in the axial direction. The temperature measuring unit may be attached to the stator core, partition plate portion, case body portion, or a plurality of power supply lines, etc.

[0121] In the above embodiment 1, the case body portion 91 has a first projection 911 that protrudes radially and through which a plurality of power supply lines 20 pass, and a second projection 912 that protrudes radially and through which a connector 39 passes. However, the case body portion does not have to have projections that protrude radially. Also, at least one of the plurality of power supply lines and the connector does not have to pass through the casing. The motor does not have to have a casing.

[0122] In the above embodiment 2, the cover projection 193 protrudes in the other axial direction A- relative to the cover flat surface 194, and one side of it is recessed in the axial direction. However, the cover projection does not need to be recessed in the axial direction as long as it protrudes in the other axial direction relative to the cover flat surface.

[0123] In the second embodiment described above, a portion of the side wall portion 195 of the cover projection 193 overlaps with the projection 55 in the axial direction A. However, the entire side wall portion may overlap with the projection in the axial direction. Also, if one side of the cover projection in the axial direction is not recessed, at least a portion of the side surface of the cover projection may overlap with the projection in the axial direction. Furthermore, the side wall portion or side surface of the cover projection does not have to overlap with the projection in the axial direction.

[0124] In the second embodiment described above, the bottom 196 of the cover projection 193 is closest to the protruding tip 55a of the projection 55 in the axial direction A. Therefore, the shortest distance G103 in the axial direction A between the protruding tip 55a of the projection 55 and the bottom 196 of the cover projection 193 is the shortest distance between the cover 192 and the projection 55. However, the cover projection may be in contact with the projection. This can more reliably prevent the power supply line from passing radially between the projection and the cover.

[0125] In the second embodiment described above, the shortest distance G103 between the bottom 196 of the cover projection 193 and the protruding tip 55a of the projection 55 is smaller than the minimum cross-sectional width W of the portion of the multiple power supply lines 20 located on the partition plate portion 50. However, the shortest distance between the bottom of the cover projection and the projection may be smaller than the maximum cross-sectional width of the portion of the multiple power supply lines located on the partition plate portion. This prevents the power supply lines from passing between the cover projection and the projection in a position where they have their maximum width. Therefore, compared to a cover without the cover projection, radial movement of the power supply lines can be suppressed.

[0126] Furthermore, this technology can also be configured as follows:

[0127] (1) The motor comprises a rotor that rotates about a central axis, a cylindrical stator having stator coils and extending axially about the central axis radially outward from the rotor, a power supply line electrically connected to the stator coils and supplying power to the stator coils, and a sensor unit that detects the rotation of the rotor. The sensor unit is located at one axial position relative to the rotor and the stator, and is positioned to coincide with the central axis when the motor is viewed in the axial direction. The power supply line is located at one axial position, and is positioned radially outward from the sensor unit when the motor is viewed in the axial direction.

[0128] (2) The motor described in (1) further has a plate-shaped partition plate portion that covers at least a part of the stator and is located between the power supply line and the stator when viewed in the axial direction of the motor. The partition plate portion has a projection that protrudes in the axial direction between the power supply line and the sensor portion when viewed in the axial direction of the motor.

[0129] (3) In the motor described in (2), the partition plate portion has a through hole through which the power supply line or at least one of the ends of the stator coil electrically connected to the power supply line passes. The through hole portion is located radially outward of the sensor portion when the motor is viewed in the axial direction.

[0130] (4) In the motor described in any one of (1) to (3), the power supply line has a connection portion at one end that is electrically connected to the end of the stator coil. The connection portion is located radially outward of the sensor portion when the motor is viewed in the axial direction.

[0131] (5) The motor described in any one of (1) to (4) further has a signal line for outputting a signal from the sensor unit. The signal line extends radially outward from the sensor unit at a position different from the power supply line when the motor is viewed in the axial direction.

[0132] (6) In the motor described in any one of (1) to (5), the stator has stator coils of multiple phases. The motor has a plurality of power supply lines, each having one end connected to the stator coils of the plurality of phases, and located radially outward of the sensor section when the motor is viewed in the axial direction. The plurality of power supply lines include a first power supply line including a first power supply line body that extends circumferentially around the central axis, and a second power supply line including a second power supply line body that extends circumferentially at different positions in the circumferential and radial directions relative to the first power supply line body.

[0133] In the motor described in (7)(6), the first power supply line includes a first radial extension extending from the end of the first power supply line body in the radial direction of the stator when the motor is viewed in the axial direction. The second power supply line includes a second radial extension extending from the end of the second power supply line body in the radial direction of the stator when the motor is viewed in the axial direction. The first radial extension and the second radial extension are arranged circumferentially relative to each other.

[0134] The motor described in (8)(7) further includes a temperature sensor, which includes a signal line for a temperature sensor, for measuring the temperature of the stator coil. The signal line for the temperature sensor extends radially from the sensor portion toward the space between the first radial extension portion and the second radial extension portion, when the motor is viewed in the axial direction.

[0135] The motor described in (9)(2) further comprises a casing having a bottomed cylindrical case body that houses the rotor, the stator, and the partition plate portion and has an opening in one axial direction, and a cover portion that covers the opening of the case body portion. The cover portion is positioned such that, when viewed in the axial direction, it overlaps with at least the portion of the power supply line located on the partition plate portion and the protruding portion.

[0136] In the motor described in (10)(9), the shortest distance between the cover portion and the protruding portion is smaller than the minimum width of the portion of the power supply line that is located on the partition plate when viewed in the axial direction.

[0137] In the motor described in (11)(9) or (10), the cover portion has a plate-shaped cover flat portion and a cover projection that protrudes from the cover flat portion in the other axial direction. The cover projection is spaced apart from the projection.

[0138] In the motor described in (12)(11), at least a portion of the cover projection overlaps with the projection when the motor is viewed in the axial direction.

[0139] In the motor described in (13)(12), the cover projection has a side portion extending in the other axial direction from the flat portion of the cover, and a bottom portion connected to the other axial side of the side portion and constituting the tip portion of the cover projection. At least a part of the side portion overlaps with the projection when the motor is viewed in the axial direction.

[0140] In the motor described in any one of (14)(11) to (13), the cover projection protrudes in the other axial direction relative to the cover plane and is recessed on one axial side. [Industrial applicability]

[0141] The present invention is applicable to a motor in which the sensor is located at a position that coincides with the central axis of the motor when viewed in the axial direction. [Explanation of symbols]

[0142] 10, 110 motors 11 rotors 16 staters 17 Stator Core 18 Stator Coil 18a Stator coil end 181 U-phase coil end 182 V-phase coil end 183 W-phase coil end 20 Power line 21 U-phase feeder line (1st feeder line) 21a U-phase feeder main body 21b U phase radial extension part 22 V phase feed line (1st feed line) 22a V-phase feeder main body 22b V phase radial extension part 23 W phase feeder line (second feeder line) 23a W-phase feeder main body 23b W phase radial extension part 28 Connection part 281 Connection point (U-phase power supply line) 282 Connection point (V-phase power supply line) 283 Connection point (W-phase power supply line) 30 Sensor Units 31 Rotation Sensor 32 Control board 35 Temperature Sensor 36 Temperature measurement unit 37 Signal line for temperature sensor 38 signal lines 39 Connectors 50 Partition plate section 50a side 50b Radial outer part 50c radial inner part 50d Step section 52 Through hole 521 1st through hole section 522 2nd through hole section 55 Protrusion 55a Protruding tip 551 1st protrusion 552 Second protrusion 58 Notch 90, 190 casing 91 Case body 911 No. 1 Pier 912 Second Pier 92, 192 Cover section 92a, 92b protrusion 192a Outer edge 193 Cover protrusion 194 Cover flat surface 195 Side wall part (side part) 196 Bottom E Sensor Unit H First projection through hole M terminal component P Central axis

Claims

1. A rotor that rotates around a central axis, A cylindrical stator having a stator coil and extending axially about the central axis radially outward from the rotor, A power supply line electrically connected to the stator coil and supplying power to the stator coil, A sensor unit for detecting the rotation of the rotor, A motor having, The aforementioned sensor unit is At one axial position relative to the rotor and the stator, the motor is positioned such that it coincides with the central axis when viewed in the axial direction, The aforementioned power supply line is At the aforementioned axial position, the motor is located radially outward from the sensor portion when viewed in the axial direction, Motor.

2. In the motor according to claim 1, Viewing the motor in the axial direction, it further has a plate-shaped partition plate portion that covers at least a part of the stator and is located between the power supply line and the stator, The partition plate portion has a protruding portion that extends axially between the power supply line and the sensor portion when the motor is viewed in the axial direction. Motor.

3. In the motor according to claim 2, The partition plate portion has a through hole through which the power supply line or at least one end of the stator coil electrically connected to the power supply line passes. The through-hole is located radially outward of the sensor portion when the motor is viewed in the axial direction. Motor.

4. In the motor according to claim 1, The power supply line has a connection portion at one end that is electrically connected to the end of the stator coil. The aforementioned connection portion is located radially outward of the sensor portion when the motor is viewed in the axial direction. Motor.

5. In the motor according to claim 1, The sensor unit further has a signal line for outputting a signal, The signal line extends radially outward from the sensor unit at a position different from the power supply line when the motor is viewed in the axial direction. Motor.

6. In the motor according to any one of claims 1 to 5, The stator has multiple phase stator coils, The motor has a plurality of power supply lines, each having one end connected to the stator coils of the plurality of phases, and located radially outward from the sensor portion when the motor is viewed in the axial direction. The aforementioned multiple power supply lines are A first power supply line including a first power supply line body that extends in the circumferential direction around the central axis, A second power supply line, including a second power supply line body extending in the circumferential direction, is located at different positions in the circumferential and radial directions relative to the first power supply line body, Having, Motor.

7. In the motor according to claim 6, The first power supply line is, The first power supply line body includes a first radial extension portion that extends from the end of the first power supply line body in the radial direction of the stator when the motor is viewed in the axial direction, The second power supply line is, The second power supply line body includes a second radial extension portion that extends from the end of the main body portion of the second power supply line in the radial direction of the stator when the motor is viewed in the axial direction, The first radially extended portion and the second radially extended portion are arranged circumferentially with respect to each other. Motor.

8. In the motor according to claim 7, The system includes a signal line for a temperature sensor and further comprises a temperature sensor for measuring the temperature of the stator coil, The signal line for the temperature sensor is, Viewing the motor in the axial direction, it extends radially from the sensor portion toward the space between the first radial extension portion and the second radial extension portion, Motor.

9. In the motor according to claim 2, The casing further comprises a bottomed cylindrical case body portion that houses the rotor, the stator, and the partition plate portion and has an opening in one axial direction, and a cover portion that covers the opening of the case body portion. The cover portion is positioned such that, when viewed in the axial direction, it overlaps with at least the portion of the power supply line located on the partition plate portion and the protruding portion. Motor.

10. In the motor according to claim 9, The shortest distance between the cover portion and the protruding portion is smaller than the minimum width of the portion of the power supply line located on the partition plate when viewed in the axial direction. Motor.

11. In the motor according to claim 9 or claim 10, The cover portion has a plate-shaped cover flat portion and a cover projection that protrudes from the cover flat portion in the other axial direction. The cover projection is spaced apart from the protruding portion. Motor.

12. In the motor according to claim 11, At least a portion of the cover projection overlaps with the protrusion when the motor is viewed in the axial direction. Motor.

13. In the motor according to claim 12, The cover projection has a side portion extending in the other axial direction from the cover's flat portion, and a bottom portion connected to the other axial side of the side portion and constituting the tip of the cover projection. At least a portion of the aforementioned side portion overlaps with the aforementioned protruding portion when the motor is viewed in the axial direction. Motor.

14. In the motor according to claim 11, The cover projection protrudes in the other axial direction relative to the cover's flat surface, and one axial side is recessed. Motor.

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