Mechanically and electrically integrated electric motor

Abstract

An object of the present invention is to provide a mechanically and electrically integrated electric motor that can be made compact while having a cooling means.SOLUTION: A mechanically and electrically integrated motor 100 includes a motor body 2 covered with a cylindrical casing 3, an inverter device 5 disposed on a side surface of the casing 3 and supplying a driving voltage to the motor body 2, and a spiral flow path 4 provided in the casing 3, formed along a spiral surrounding the inside of the casing 3, and allowing a refrigerant to flow therethrough. The motor body 2 and the inverter device 5 are configured to be cooled by the refrigerant flowing through the spiral flow path 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electromechanical integrated motor. [Background technology]

[0002] There is known an electromechanically integrated motor (hereinafter sometimes simply referred to as "motor") in which the motor body and an inverter device (hereinafter sometimes simply referred to as "inverter") that drives the motor body are integrated. For example, Patent Document 1 describes an electric motor that includes a cylindrical motor body and an inverter for driving the motor body. The inverter is attached to the axial end of the motor body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-101917 Summary of the Invention [Problem to be solved by the invention]

[0004] By cooling the motor body and the inverter, it is possible to suppress temperature increases and improve reliability. However, in the motor described in Patent Document 1, if separate cooling means are provided for the motor body and the inverter, the entire motor including the cooling means becomes larger, which is disadvantageous from the perspective of compactness.

[0005] In other words, Patent Document 1 does not provide sufficient disclosure from the viewpoint of making the mechanically and electrically integrated motor having a cooling means compact.

[0006] SUMMARY OF THE INVENTION The object of the present invention is to provide a mechanically and electrically integrated electric motor that can be made compact while still having a cooling means. [Means for solving the problem]

[0007] In order to solve the above problems, one aspect of the present invention provides an electrically integrated motor including a motor body enclosed in a cylindrical casing, an inverter device disposed on a side of the casing and supplying a drive voltage to the motor body, and a spiral flow path provided within the casing and formed along a spiral surrounding the interior of the casing for circulating a refrigerant, wherein the refrigerant flows through the spiral flow path to cool the motor body and the inverter device.

[0008] Any combination of the above components, or mutual substitution of the components or expressions of the present invention between methods, systems, etc., are also valid aspects of the present invention. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a mechanically and electrically integrated electric motor that can be made compact while having a cooling means. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a side view showing a mechanically and electrically integrated electric motor according to a first embodiment. [Figure 2] FIG. 2 is a diagram schematically illustrating a spiral flow path of the electric motor of FIG. [Figure 3] FIG. 2 is a block diagram showing a schematic electrical configuration of the electric motor shown in FIG. [Figure 4] FIG. 10 is a side view showing a mechanically and electrically integrated electric motor according to a second embodiment. [Figure 5] FIG. 5 is a perspective view schematically showing a bus bar of the electromechanical integrated motor of FIG. [Figure 6] FIG. 10 is a side view showing a mechanically and electrically integrated electric motor according to a third embodiment. [Figure 7] FIG. 10 is a side view showing a mechanically and electrically integrated electric motor according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modified examples, identical or equivalent components and members are given the same reference numerals, and redundant explanations will be omitted where appropriate. When identical or equivalent components and members are to be distinguished, a capital letter such as A, B, or C is added to the end of the reference numeral; when no distinction is made, this letter is not added. Furthermore, the dimensions of the components in each drawing are enlarged or reduced as appropriate for ease of understanding. Furthermore, in each drawing, some components that are not important for explaining the embodiments are omitted.

[0012] Furthermore, terms including ordinal numbers such as first and second are used to describe various components, but these terms are used only to distinguish one component from another and do not limit the components.

[0013] [First embodiment] The configuration of a mechanically and electrically integrated electric motor 100 (hereinafter sometimes referred to as "electric motor 100") according to a first embodiment will be described with reference to the drawings. As an example, the electric motor 100 is suitable for use in driving on-board equipment of a vehicle adapted to travel on unpaved terrain, particularly on-board equipment that is subject to large vibrations and shocks. Examples of such vehicles include what are known as off-highway vehicles.

[0014] FIG. 1 is a side view that schematically shows an example of an electric motor 100. FIG. 2 is a diagram that schematically shows a spiral flow path of the electric motor 100. FIG. 3 is a block diagram that schematically shows the electrical configuration of the electric motor 100. The electric motor 100 includes an electric motor main body 2, an inverter device 5, a bus bar 6, and a spiral flow path 4. The bus bar 6 is, for example, a copper wiring that electrically connects the inverter device 5 and the electric motor main body 2. The bus bar 6 supplies driving power from the inverter device 5 to the electric motor main body 2.

[0015] The electric motor 100 outputs rotational motion from a spindle shaft 25 extending in a direction along the rotation axis La (hereinafter referred to as the "axial direction"). Hereinafter, the direction parallel to the rotation axis La will be referred to as the axial direction (left-right direction in the drawing), the direction perpendicular to the rotation axis La in a plane perpendicular to the rotation axis La will be referred to as the radial direction, and the circumferential direction of a circle centered on the rotation axis La will be referred to as the "circumferential direction." For convenience, the left side in FIG. 1 may be referred to as the "front" and the opposite side as the "rear." These notations of directions do not limit the orientation in which the electric motor 100 is used, and the electric motor 100 can be used in any orientation.

[0016] There are no particular limitations on the motor body 2 as long as it can rotate in response to a supplied current, but in this example it is an interior permanent magnet synchronous motor. Interior permanent magnet synchronous motors are well known, so a detailed explanation will be omitted and only an outline will be provided.

[0017] The electric motor body 2 in this example includes a casing 3, a stator 22, a rotor 24, a spindle shaft 25, two bearings 26, a front cover 27, a rear cover 28, and an overcover 29. The electric motor body 2 is an inner rotor type in which the rotor 24 is surrounded by the stator 22.

[0018] The casing 3 is a tubular member that surrounds the internal mechanism of the motor body 2, and in this example has a generally cylindrical shape. The casing 3 can be made of a metal such as an aluminum alloy, and can be formed by a casting process such as die casting.

[0019] The stator 22 can be constructed by providing a predetermined number of windings 224 on a stator core 222 made by laminating a predetermined number of disc-shaped electromagnetic steel plates. The rotor 24 includes a cylindrical rotor yoke 242 and a magnet 244 provided on the rotor yoke 242. The magnet 244 is provided with magnetic poles that generate a magnetic field. The characteristics and shape of the magnet 244 can be set by experiment or simulation to match the desired magnetic performance. The magnet 244 in this example is a so-called neodymium magnet, whose main components are neodymium, iron, and boron.

[0020] The spindle shaft 25 is a cylindrical stainless steel rod-like body with its longitudinal direction in the axial direction, and is fixed to the center of the rotor yoke 242. Two bearings 26 are disposed axially on the front and rear sides of the rotor yoke 242, and support the spindle shaft 25 rotatably relative to the casing 3. The bearings 26 in this example are ball bearings.

[0021] The front cover 27 is a disc-shaped member that covers the front end of the casing 3 and has a recess in its radial center that houses the bearing 26. The rear cover 28 is a disc-shaped member that covers the rear end of the casing 3 and has a recess in its radial center that houses the bearing 26.

[0022] The over-cover 29 is a cup-shaped member provided on the rear side of the rear cover 28, and is fixed to the rear cover 28. An axial space 292 is formed between the rear cover 28 and the over-cover 29.

[0023] The bus bar 6 is, for example, a copper wiring that electrically connects the inverter device 5 and the electric motor body 2. The bus bar 6 supplies driving power from the inverter device 5 to the windings 224 of the electric motor body 2. The cross-sectional area and shape of the bus bar 6 can be set by experiment or simulation according to the desired characteristics. As shown in FIG. 1 , the bus bar 6 is wired from the inverter device 5 to the windings 224 through radial holes 294 provided on the outer periphery of the over-cover 29, through the axial space 292 between the rear cover 28 and the over-cover 29, and through axial holes 284 provided in the rear cover 28.

[0024] The spindle shaft 25 protrudes forward from the front cover 27 and protrudes rearward from the rear cover 28. The rear end of the spindle shaft 25 is located forward from the over-cover 29.

[0025] The spiral flow path 4 is provided within the casing 3 and, as shown in FIG. 2, is formed along a spiral surrounding the interior of the casing 3, and is a flow path through which the refrigerant F flows. The cross section of the spiral flow path 4 may be circular or elliptical, but in this example is rectangular. An inlet 42 of the spiral flow path 4 is provided at one end, and an outlet 43 of the flow path is provided at the other end. The refrigerant F circulates through a circulation path 48 that includes the spiral flow path 4. In the circulation path 48, the refrigerant F is supplied to the inlet 42 by an external pump 45, flows through the spiral flow path 4, and enters the radiator 46 from the outlet 43. The radiator 46 is air-cooled by a fan (not shown) before returning to the external pump 45.

[0026] In this way, the refrigerant F circulates through the circulation path 48 including the spiral flow path 4, and the refrigerant F flows through the spiral flow path 4, whereby the thermal energy of the electric motor body 2 and the inverter device 5 is recovered by the refrigerant F and discharged from the radiator 46. As a result, the electric motor body 2 and the inverter device 5 are cooled. Therefore, the casing 3 functions as a water jacket for the electric motor body 2 and the inverter device 5. There are no particular limitations on the refrigerant F as long as it produces the desired cooling effect. In this example, the refrigerant F is a coolant known as LLC (long life coolant), which has anti-freeze and anti-rust effects.

[0027] The inverter device 5 is disposed on the side surface 32 of the casing 3 and supplies a driving voltage to the electric motor main body 2. There are no particular limitations on the inverter device 5 as long as it is capable of outputting an AC voltage in which the magnitude and frequency of the voltage are arbitrarily changed from input electrical energy, and any known inverter device can be used. In this example, the inverter device 5 has a hollow case 58 as an outer shell that covers the inside of the device. The case 58 is connected to the side surface 32 of the casing 3. The case 58 is a hollow box in the shape of a rectangular parallelepiped, and the surface facing the side surface 32 of the casing 3 is open.

[0028] The inverter device 5 shown in Fig. 3 includes a smoothing capacitor 52 that smooths a supply voltage V1 from a power supply device 51, and a three-phase bridge circuit 54 that generates and outputs a three-phase AC voltage V3 from the supply voltage V1 smoothed by the smoothing capacitor 52. The capacitance of the smoothing capacitor 52 can be set based on the desired smoothing performance. The power supply device 51 can be configured to include a primary power source such as a storage battery (e.g., a lithium-ion battery) or an external power supply, and a step-up / step-down converter that boosts the voltage of the primary power source to the supply voltage V1. For example, the supply voltage V1 may be boosted to 200V to 800V.

[0029] The three-phase bridge circuit 54 has six switching elements Q that switch the supply voltage V1 supplied to the three-phase bridge circuit 54. The switching elements Q switch the supply voltage V1 to generate and output a driving PWM voltage. The switching elements Q are not particularly limited as long as they are capable of switching a DC voltage to generate a PWM voltage, and may be Si semiconductor devices or SiC semiconductor devices. Examples of such semiconductor devices include IGBTs and MOSFETs. In the example of FIG. 3, the switching elements Q are IGBTs.

[0030] The smoothing capacitor 52, the switching element Q, and other electrical components are fixed by soldering or the like to a wiring circuit board 53. The circuit board 53 is a printed circuit board that functions as wiring for the electronic circuits of the inverter device 5. The circuit board 53 is fixed to the side surface 32 of the casing 3 via one or more spacers 55.

[0031] Devices such as the switching element Q and smoothing capacitor 52 generate heat and their temperatures rise when the inverter device 5 is operating. Using these devices above their rated temperatures can shorten their lifespan and, in the worst case, can even cause damage. Therefore, in the example of FIG. 1, in order to actively dissipate heat from these devices, the switching element Q is arranged so that it dissipates heat directly into the casing 3, and the smoothing capacitor 52 is arranged so that it dissipates heat directly into the casing 3. Here, dissipating heat directly from the device into the casing means that the device is in close contact with the casing directly or via a thin sheet. Silicone grease or the like may be interposed between them.

[0032] Furthermore, to improve the cooling efficiency of these devices, it is desirable to arrange these devices near the spiral flow path 4. In the example of FIG. 1, the axial width W1 of the spiral flow path 4A arranged closest to the switching element Q is larger than the axial width W2 of the spiral flow paths 4B before and after it. According to the inventor's investigations, the axial width W1 is preferably at least twice the axial width W2, more preferably at least three times, and even more preferably at least four times. In this embodiment, the axial width W1 is four times the axial width W2. In this case, the larger the axial width W1, the greater the flow rate of the refrigerant F in the flow path, which is expected to improve the cooling performance of the switching element Q.

[0033] The busbar 6 will now be described. The busbar 6 is a rod-shaped conductor that transmits a large current and has a larger cross-sectional area than a conductor wire. The busbar 6 has an axial conductor portion 62, a radial conductor portion 63, a forward conductor portion 66, and a connection portion 68, which are connected in this order. The axial conductor portion 62 has a portion that extends from the front to the rear in the axial direction within the inverter device 5. The radial conductor portion 63 extends radially inward from the extending end of the axial conductor portion 62. The forward conductor portion 66 extends forward in the axial direction from the extending end of the radial conductor portion 63. The connection portion 68 is a portion that connects the extending end of the forward conductor portion 66 to the winding 224.

[0034] The radial conductor portions 63 pass through radial holes 294 formed in the side surface of the overcover 29 and enter the axial space 292. The forward conductor portions 66 pass through axial holes 284 formed in the rear cover 28 and enter the front side of the rear cover 28. As an example, the radial conductor portions 63 are fixed to the upper surface of the circuit board 53 via one or more spacers 57. Note that each conductor portion of the busbar 6 does not necessarily need to extend in only one direction, and may have an inclined portion, a bent portion, a branched portion, a junction portion, etc.

[0035] The busbar 6 may or may not be covered with an insulating coating. If it is covered with an insulating coating, it is easier to avoid contact with other components due to vibration or impact than if it is not covered. If it is not covered with an insulating coating, it has higher heat dissipation than if it is covered. Whether or not to have an insulating coating can be selected depending on the desired characteristics. In the example of Figure 1, the busbar 6 is not covered with an insulating coating.

[0036] The operation of the electric motor 100 of the first embodiment configured as described above will now be described. When a drive command for the electric motor 100 is input to the inverter device 5, a three-phase AC voltage V3 is supplied from the inverter device 5 to the windings 224 of the stator 22 via the bus bar 6. In response to this three-phase AC voltage V3, the stator 22 generates a rotating magnetic field. The generated rotating magnetic field interacts with the magnetic field generated by the magnetic poles of the magnet 244, generating a rotational torque in the rotor 24. This rotational torque rotates the spindle shaft 25 fixed to the rotor 24, which then rotates and drives a driven body (not shown).

[0037] When the electric motor 100 operates, the electric motor body 2 and the inverter device 5 generate thermal energy and their temperatures rise. At this time, by circulating the refrigerant F through the circulation path 48 including the spiral flow path 4, the refrigerant F flows through the spiral flow path 4, recovers the thermal energy of the electric motor body 2 and the inverter device 5, and is discharged from the radiator 46. As a result, the electric motor body 2 and the inverter device 5 are cooled.

[0038] The features of the electrically and mechanically integrated electric motor 100 of the first embodiment configured as described above will be described below. The electric motor 100 of the first embodiment includes an electric motor main body 2 enclosed in a cylindrical casing 3, an inverter device 5 disposed on the side of the casing 3 and supplying a driving voltage to the electric motor main body 2, and a spiral flow path 4 provided within the casing 3 and formed along a spiral surrounding the inside of the casing 3, through which a refrigerant flows. The electric motor main body 2 and the inverter device 5 are cooled by the refrigerant flowing through the spiral flow path 4.

[0039] According to this configuration, the motor body 2 and the inverter device 5 can be cooled simultaneously by a single circulation path 48 for the refrigerant F. This is advantageous for making the electromechanical integrated motor more compact than when separate cooling means are provided. Furthermore, by providing the inverter device 5 on the side of the motor body 2, the axial dimension of the motor 100 can be made smaller than when it is provided at the end. Furthermore, by providing the circulation path 48 for the refrigerant F in a spiral shape around the circumferential direction of the motor body 2, there is no sudden change in the flow path direction of the circulation path, thereby reducing pressure loss.

[0040] Second to fourth embodiments of the present invention will be described below. In the description of these embodiments, the same or equivalent components and members as those in the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted where appropriate.

[0041] [Second embodiment] The configuration of a mechanically and electrically integrated electric motor 200 (hereinafter sometimes referred to as "electric motor 200") according to a second embodiment of the present invention will be described with reference to Figures 4 and 5. Figure 4 is a side view showing the mechanically and electrically integrated electric motor 200 according to the second embodiment, and corresponds to Figure 1. Figure 5 is a perspective view showing an example of a bus bar according to this embodiment. In this figure, the circuit board 53 and the insulating coating 67 are omitted.

[0042] The electric motor 200 of this embodiment differs from the electric motor 100 of the first embodiment in that the shape of the busbars 6 is different and the busbars 6 are covered with insulating coatings 67, but the other configurations are the same. Therefore, the following description will focus on the differences.

[0043] In this embodiment, within the inverter device 5, the busbar 6 includes an axial conductor portion 62 having a portion extending in the axial direction, an intermediate conductor portion 64 having a portion bending radially inward from the tip side of the axial conductor portion 62, and a continuing conductor portion 65 bending in the axial direction from the tip side of the intermediate conductor portion 64 so as to move away from the axial conductor portion 62. The intermediate conductor portion 64 or the continuing conductor portion 65 is supported by the casing 3 via a terminal block 72.

[0044] The electric motor 200 of the second embodiment configured as described above operates in the same manner as the electric motor 100 of the first embodiment, and provides the same functions and effects as the first embodiment. In addition, the electric motor 200 has an intermediate conductor portion 64 and a continuing conductor portion 65. The intermediate conductor portion 64 or the continuing conductor portion 65 is supported on the casing 3 via the terminal block 72, so that the front-to-rear width of the axial conductor portion 62 is shorter than that of the first embodiment, as shown in FIG. 5 . This improves the strength of the busbar 6 and increases the natural vibration of the busbar 6. As a result, the vibration resistance and impact resistance of the inverter device 5 can be improved.

[0045] The configuration of the terminal block 72 is not particularly limited as long as it can support and fix the intermediate conductor portion 64 or the continuous conductor portion 65 to the casing 3. In this example, the terminal block 72 is a disk-shaped member made of insulating resin. The terminal block 72 can be fixed to the side surface 32 of the casing 3 by adhesive, and the intermediate conductor portion 64 or the continuous conductor portion 65 can be fixed to the terminal block 72 by adhesive.

[0046] The busbar 6 has a portion supported by the terminal block 72 covered with an insulating coating 67. In this example, the axial conductor portion 62, the intermediate conductor portion 64, the continuous conductor portion 65, the radial conductor portion 63, and the forward conductor portion 66 are covered with the insulating coating 67. The insulating coating 67 is not particularly limited as long as it has the desired insulating performance and flame retardancy. As an example, the insulating coating 67 can be made of PPS (polyphenylene sulfide), epoxy resin, or the like. Covering the busbar 6 with the insulating coating 67 increases the natural vibration of the busbar 6, thereby improving the vibration resistance and impact resistance of the inverter device 5.

[0047] [Third embodiment] The configuration of a mechanically and electrically integrated electric motor 300 (hereinafter sometimes referred to as "electric motor 300") according to a third embodiment of the present invention will be described with reference to Fig. 6. Fig. 6 is a side view showing electric motor 300 according to the third embodiment, and corresponds to Fig. 1.

[0048] The electric motor 300 of this embodiment differs from the electric motor 100 of the first embodiment in that resin R is provided to support the busbars 6, but the other configurations are similar. Therefore, the following description will focus on the differences. In the electric motor 300, as shown in FIG. 6 , the circuit board 53 mounted on the inverter device 5, the electrical components including the switching elements Q, and the axial conductors 62 are integrated with resin R and supported by the casing 3. While there are no limitations on the resin R, the resin R in this example is a thermosetting epoxy resin. The assembled circuit board 53, electrical components, and axial conductors 62 are placed in a predetermined mold, and liquid resin R is poured into the mold and heated to harden, forming an integrated resin block. The resin block integrated with resin R can be fixed to the casing 3 by means of fasteners such as bolts or adhesive. Note that the circuit board 53 and electrical components do not all need to be integrated with resin R; some of these components may be excluded from the range of integration with resin R.

[0049] The electric motor 300 of the third embodiment configured in this manner operates in the same manner as the electric motor 100 of the first embodiment, and provides the same functions and effects as those of the first embodiment. In addition, by integrating the bus bar 6, the circuit board 53, the electrical components, and the axial conductor portion 62, the vibration resistance and impact resistance of the inverter device 5 can be improved.

[0050] In this embodiment, the radial conductor portions 63 are supported on the case 58 of the inverter device 5 via the terminal block 74. This prevents the radial conductor portions 63 from coming into contact with other components due to vibration or impact. The form, mounting position, and mounting method of the terminal block 74 can be determined by experiment or simulation so as to satisfy the desired earthquake resistance performance.

[0051] [Fourth embodiment] The configuration of a mechanically and electrically integrated electric motor 400 (hereinafter sometimes referred to as "electric motor 400") according to a fourth embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is a side view showing the electric motor 400 according to the fourth embodiment, and corresponds to FIG. 1. The electric motor 400 of this embodiment differs from the electric motor 100 of the first embodiment in that the spiral passage 4 is provided with protrusions 44 that protrude into the passage to promote cooling, but the other configurations are similar. Therefore, the following description will focus on the differences. The shape of the protrusions 44 can be set by experiment or simulation so that the contact area between the refrigerant F and the spiral passage 4 is a desired area.

[0052] 7, the protrusions 44 are thin fins that protrude from the outer periphery of the spiral flow passage 4 toward the inner periphery, and multiple protrusions 44 are provided. In this example, eight protrusions 44 are arranged at predetermined intervals in the axial direction. The protrusions 44 can be formed integrally with the casing 3 by casting. The protrusions 44 may be provided on the entire spiral flow path 4, or on all or part of the spiral flow path 4. In the example of Fig. 7, the protrusions 44 are provided on the spiral flow path 4A, which is wider than the spiral flow paths 4B before and after it. The spiral flow path 4B is the spiral flow path disposed closest to the switching element Q.

[0053] The electric motor 400 of the fourth embodiment configured as described above operates in the same manner as the electric motor 100 of the first embodiment, and provides the same functions and effects as those of the first embodiment. In addition, the spiral flow path 4 has the projections 44 that protrude into the flow path, which increases the contact area between the refrigerant F and the spiral flow path 4, which is advantageous in terms of cooling efficiency.

[0054] The above describes in detail exemplary embodiments of the present invention. The above-described embodiments merely illustrate specific examples of implementing the present invention. The content of the embodiments does not limit the technical scope of the present invention, and many design modifications, such as changes, additions, and deletions of components, are possible within the scope of the inventive concept defined in the claims. In the above-described embodiments, content that allows such design modifications is described using notations such as "in the embodiment" or "in the embodiment," but design modifications are also permissible for content not otherwise specified. Furthermore, hatching in the drawings does not limit the material of the hatched object.

[0055] (Variation) The following describes the modified examples. In the drawings and descriptions of the modified examples, the same or equivalent components and members as those in the embodiment are denoted by the same reference numerals. Explanations that overlap with the embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the embodiment.

[0056] 7, an example has been described in which the protrusions 44 are provided on the spiral flow path 4A, which is wider than the spiral flow paths 4B before and after it, but the present invention is not limited to this. For example, the protrusions 44 may be provided on the spiral flow path 4B, or may be provided on both the spiral flow path 4A and the spiral flow path 4B.

[0057] In the above description, an example was given in which the magnet 244 was a neodymium magnet, but the present invention is not limited to this. For example, the magnet may be a rare earth magnet or a ferrite magnet whose main component is a rare earth element other than neodymium, or it may be a plastic magnet.

[0058] Each of these modifications provides the same functions and effects as the embodiment.

[0059] Any combination of the above-described embodiments and modifications is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the combined effects of the combined embodiments and modifications. [Explanation of symbols]

[0060] 2 Motor body, 3 Casing, 4 Spiral flow path, 5 Inverter device, 6 Bus bar, 32 Side, 44 Protrusion, 48 Circulation path, 52 Smoothing capacitor, 58 Case, 62 Axial conductor portion, 63 Radial conductor portion, 64 Intermediate conductor portion, 65 Continuing conductor portion, 66 Forward conductor portion, 67 Insulating coating, 72,74 Terminal block, 100,200,300,400 Integrated electromechanical motor.

Claims

1. an electric motor body covered with a cylindrical casing; an inverter device disposed on a side surface of the casing and supplying a driving voltage to the electric motor body; a spiral flow path provided within the casing, formed along a spiral surrounding the interior of the casing, through which a refrigerant flows; Equipped with The electromechanical integrated motor is configured so that the motor body and the inverter device are cooled by the refrigerant flowing through the spiral flow path.

2. the inverter device has a switching element that switches a supplied voltage to output the driving voltage, 2. The electromechanical integrated motor according to claim 1, wherein the switching element is disposed so as to dissipate heat directly to the casing.

3. the inverter device has a smoothing capacitor that smoothes the voltage supplied to the switching element, 3. The mechanically and electrically integrated motor according to claim 2, wherein the smoothing capacitor is disposed so as to dissipate heat directly to the casing.

4. a bus bar electrically connecting the inverter device and the electric motor body; Within the inverter device, the bus bar includes: an axial conductor portion having a portion extending in an axial direction; an intermediate conductor portion having a portion bent radially inward from a tip end side of the axial conductor portion; and a continuing conductor portion bent from the tip end side of the intermediate conductor portion so as to move away from the axial conductor portion in the axial direction, 2. The electromechanical integrated motor according to claim 1, wherein the intermediate conductor portion or the continuous conductor portion is supported by the casing via a terminal block.

5. The electromechanical integrated motor according to claim 4 , wherein the bus bars are covered with an insulating coating at portions supported by the terminal blocks.

6. a bus bar electrically connecting the inverter device and the electric motor body; the bus bar includes an axial conductor portion having a portion extending in an axial direction within the inverter device and a radial conductor portion having a portion extending radially inward from the axial conductor portion, 2. The mechanically and electrically integrated electric motor according to claim 1, wherein the electronic components mounted on the inverter device and the axial conductor portion are integrated with resin and supported by the casing.

7. The electromechanical integrated motor according to claim 6, wherein the radial conductor portions are supported on a case of the inverter device via a terminal block.

8. The mechanically and electrically integrated motor according to claim 1 , wherein the casing is provided with a protrusion that protrudes into the spiral flow path to promote cooling.

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