JP2020191718A - Manufacturing method of electric motor control device - Google Patents

Abstract

To reduce a work time required for electrically connecting a first connection terminal of an electric motor and a second connection terminal of a control board.SOLUTION: An electric motor has motor connection terminals 31a1, 31a2, 31a3. A control board 41b has through-holes 41b1, 41b2, 41b3 corresponding to the motor connection terminals. A metal connecting portion 50 for electrically connecting the electric motor and the control board 41b has a joint portion 51 joined to the motor connection terminals and a coupled portion 52 in which one end is coupled to the joint portion 51 and the other end is joined to the through-holes. Provided is a method for manufacturing an electric motor control device including a first joining step of joining the motor connection terminals and the joint portion 51 and a second joining step of joining the through-holes and the coupled portion 52 in a state where the coupled portion 52 is hotter than the external space by heat transferred from the joint portion 51 heated by the first joining step.SELECTED DRAWING: Figure 11

Description

The present invention relates to a method for manufacturing an electric motor control device.

Conventionally, an electric compressor including a motor, a compression mechanism rotated by the output of the motor, a housing for accommodating them, and a circuit unit for driving and controlling the motor is known (see, for example, Patent Document 1). Patent Document 1 discloses that a lead pin of a motor terminal connected to a motor terminal in a housing is connected to a terminal portion of a power board.

Japanese Unexamined Patent Publication No. 2014-101823

In the electric compressor of Patent Document 1, the lead pin of the motor terminal is directly connected to the terminal portion of the power board. Therefore, when the vibration of the motor and the compression mechanism housed in the housing is transmitted to the lead pin, an excessive stress may be applied to the lead pin and the terminal portion of the power board. Therefore, instead of connecting the lead pin directly to the terminal portion of the power board, it is conceivable to electrically connect the lead pin and the terminal portion of the power board via another member that allows vibration.

However, when the lead pin and the terminal portion of the power board are electrically connected via another member, the lead pin and the other member are joined by soldering or welding, and the terminal portion of the power board and the other member are soldered or joined. It is necessary to join by welding. That is, as compared with the case where the lead pin is directly connected to the terminal portion of the power board, the number of places to be joined by soldering or welding increases, and the working time required for manufacturing increases.

The present invention has been made in view of such circumstances, and the working time of the work required for electrically connecting the first connection terminal of the electric motor and the second connection terminal of the control board. It is an object of the present invention to provide a method for manufacturing an electric motor control device capable of shortening.

In order to solve the above problems, the method for manufacturing the electric motor control device of the present invention employs the following means.
In the method for manufacturing an electric motor control device according to one aspect of the present invention, the electric motor control device electrically connects an electric motor, a control board for controlling the electric motor, and the electric motor and the control board. The electric motor has a first connection terminal, the control board has a second connection terminal corresponding to the first connection terminal, and the connection part has a first connection terminal. It has a joint portion that is joined to the first connection terminal by soldering or welding, and a connecting portion that has one end connected to the joint portion and the other end connected to the second connection terminal by soldering or welding. , The first joining step of joining the first connection terminal and the joining portion by soldering or welding, and the heat transferred from the joining portion heated by the first joining step causes the connecting portion to be larger than the surrounding space. It includes a second joining step of joining the second connection terminal and the connecting portion by soldering or welding at a high temperature.

According to the method for manufacturing an electric motor control device according to one aspect of the present invention, in the first joining step, the first connection terminal of the electric motor and the plate-shaped joint are joined by soldering or welding, and are joined from a tool. The heat applied to the joint is stored in the joint and transferred to the joint. Then, in the second joining step, the connecting portion is joined to the second connecting terminal of the control board by soldering or welding at a temperature higher than the surrounding space by the heat transferred from the joining portion. Since the connecting portion is joined at a temperature higher than that of the surrounding space, the working time required for soldering or welding can be shortened as compared with the case where the connecting portion has the same temperature as the surrounding space.

In the method for manufacturing an electric motor control device according to one aspect of the present invention, the electric motor has a plurality of the first connection terminals, and the control board has a plurality of the said ones corresponding to the plurality of the first connection terminals. The first joining step is a step of continuously joining a plurality of the first connecting terminals arranged adjacent to each other and the plurality of the joining portions, and the second joining step. Is a step of continuously joining the plurality of the second connection terminals arranged adjacent to each other and the plurality of the connecting portions after the first joining step is executed.

According to the manufacturing method of the electric motor control device having this configuration, a plurality of second connection terminals arranged adjacent to each other after the plurality of first connection terminals arranged adjacent to each other and the joint portion are continuously joined. And the connecting part are continuously joined. Therefore, the work time required for soldering or welding can be shortened as compared with the case where the first connection terminal and the joint portion are joined and the second connection terminal and the connecting portion are joined alternately.

According to the present invention, the electric motor control device capable of shortening the work time required for electrically connecting the first connection terminal of the electric motor and the second connection terminal of the control board. A manufacturing method can be provided.

It is a side view which shows the inverter integrated electric compressor which concerns on one Embodiment of this invention. It is a perspective view which shows the inverter device incorporated in the inverter integrated electric compressor shown in FIG. It is a partially enlarged view in the vicinity of the connection part shown in FIG. It is a figure which looked at the vicinity of the connection part shown in FIG. 3 along the Y axis. It is a top view of the vicinity of the connection part shown in FIG. It is a figure which looked at the vicinity of the connection part shown in FIG. 3 along the X axis. It is a flowchart which shows the manufacturing method of the inverter device which concerns on one Embodiment of this invention. It is a partially enlarged view which looked at the vicinity of the connection part shown in FIG. 3 along the Y axis, and is the figure which shows the joining process of a motor connection terminal and a joint part. It is a partially enlarged view which looked at the vicinity of the connection part shown in FIG. 3 along the Y axis, and is the figure which shows the joining process of a motor connection terminal and a joint part. It is a partially enlarged view which looked at the vicinity of the connection part shown in FIG. 3 along the Y axis, and is the figure which shows the joining process of a motor connection terminal and a joint part. It is a partially enlarged view which looked at the vicinity of the connection part shown in FIG. 3 along the Y axis, and is the figure which shows the joining process of a through hole and a connection part. It is a top view of the vicinity of the connection part shown in FIG. 3, and is the figure which shows the position of a tool.

Hereinafter, the inverter-integrated electric compressor (electric motor control device) 100 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an inverter-integrated electric compressor 100 according to the present embodiment. FIG. 2 is a perspective view showing an inverter device 40 incorporated in the inverter-integrated electric compressor shown in FIG.

As shown in FIG. 1, the inverter-integrated electric compressor 100 includes a housing (housing) 10 forming a closed internal space, a compressor (compressor) 20 housed in the internal space of the housing 10, and the compressor (compressor) 20. An electric motor 30 housed in the internal space of the housing 10, an inverter device 40 having a control board 41b for controlling the electric motor 30, and a connecting portion 50 for electrically connecting the electric motor 30 and the inverter device 40. Be prepared. The inverter-integrated electric compressor 100 of the present embodiment is a compressor used in an air conditioner for vehicles, and is a device for driving the compressor 20 by an electric motor 30 whose drive rotation speed is controlled by an inverter device 40. is there.

The housing 10 includes a compressor housing 11 that houses the compressor 20 and a motor housing 12 that houses the electric motor 30. The housing 10 forms a closed internal space by connecting the compressor housing 11 and the motor housing 12 with bolts 13. The housing 10 is made of, for example, an aluminum alloy.

A refrigerant suction port 14 for sucking low-pressure refrigerant gas is provided on the rear end side (right end side in FIG. 1) of the motor housing 12. A refrigerant discharge port 15 for discharging the compressed refrigerant gas to the outside is provided on the front end side (left end side in FIG. 1) of the compressor housing 11.

An inverter accommodating portion 16 for integrally incorporating the inverter device 40 is provided on the outer peripheral portion of the motor housing 12. The inverter accommodating portion 16 is composed of an inverter box 17 integrally formed with the motor housing 12 and a junction box 18 integrally coupled to the inverter box 17 via screws or the like. The junction box 18 also serves as a cover that closes the upper surface of the inverter box 17.

The inverter box 17 has a substantially rectangular shape in a plan view and has a rising wall that is raised upward around the inverter box 17. A flange surface 17A for fixing the junction box 18 is formed on the upper surface of the inverter box 17. The bottom surface on the inner side of the inverter box 17 is a flat surface on which the inverter module 41 constituting the inverter device 40 is installed. This flat surface is composed of an outer peripheral wall of the motor housing 12.

The junction box 18 is a box body for accommodating the inverter device 40, and is made of, for example, an aluminum alloy. The junction box 18 has the same rectangular shape as the inverter box 17 in a plan view, and a flange surface 18A for integrally coupling with the inverter box 17 is formed on the lower surface of the peripheral wall.

The compressor 20 is a device that compresses the low-pressure refrigerant gas sucked from the refrigerant suction port 14 and discharges it to the refrigerant discharge port 15. The compressor 20 is, for example, a scroll compressor having a swivel scroll (not shown) connected to a drive shaft rotated by an electric motor 30 and a fixed scroll (not shown) fixed to the compressor housing 11.

The electric motor 30 is a drive that connects a stator (not shown) that generates an alternating magnetic field by an alternating current supplied from the inverter device 40, a rotor (not shown) that rotates by a magnetic force received from the alternating magnetic field, and the rotor and the compressor 20. A shaft (not shown) is provided. The electric motor 30 drives the compressor 20 by rotating the drive shaft.

The inverter device 40 includes an inverter module 41 housed in the inverter box 17 and a noise removing filter circuit (not shown) housed in the junction box 18. As shown in FIG. 2, the inverter module 41 is a device in which a metal base plate (base) 41a and a control board 41b are integrally modularized via a plurality of spacers 41c. The metal base plate 41a is made of a rectangular aluminum alloy plate material, and is fixed by screws so as to be in close contact with the flat outer peripheral wall of the motor housing 12 which is the bottom surface of the inverter box 17.

The control board 41b is connected to the vehicle side control device (ECU) via a communication line, and is equipped with a control circuit that transmits and receives control signals to and from the ECU and controls AC power applied to the electric motor 30 based on the control signals. It is a rectangular substrate. An intelligent power module (not shown) having a UVW output terminal that outputs a three-phase alternating current to the electric motor 30 is mounted on the control board 41b. The control board 41b is integrated with the metal base plate 41a via a plurality of spacers 41c.

FIG. 3 is a partially enlarged view of the vicinity of the connection portion 50 shown in FIG. As shown in FIG. 3, the control board 41b has through holes (second connection terminals) 41b1, 41b2, 41b3 which are three connection terminals electrically connected to the UVW output terminal of the intelligent power module.

The three through holes 41b1, 41b2, 41b3 are electrically connected to the motor connection terminals (first connection terminals) 31a1, 31a2, 31a3 of the insulation terminal portion 31 of the electric motor 30 by the connection portion 50, respectively. The through holes 41b1, 41b2, 41b3 are arranged at equal intervals along the first straight line L1 parallel to the X axis shown in FIG. Similarly, the motor connection terminals 31a1, 31a2, 31a3 are arranged at equal intervals along the second straight line L2 parallel to the X axis shown in FIG. 3, respectively.

FIG. 4 is a view of the vicinity of the connection portion 50 shown in FIG. 3 along the Y axis. FIG. 5 is a plan view of the vicinity of the connecting portion 50 shown in FIG. 3 as viewed from above. As shown in FIGS. 4 and 5, the insulated terminal portion 31 is attached to the opening 12A provided in the motor housing 12 by the fastening bolt 32. The insulated terminal portion 31 seals the opening 12A so that the internal space IS of the motor housing 12 and the external space (surrounding space) OS of the motor housing 12 do not communicate with each other.

As shown in FIG. 5, in the control board 41b viewed in a plan view, the three through holes 41b1, 41b2, 41b3 are arranged along the first straight line L1. That is, the three through holes 41b1, 41b2, 41b3 are arranged on the same straight line. Further, the three motor connection terminals 31a1, 31a2, 31a3 are arranged along the second straight line L2. That is, the three motor connection terminals 31a1, 31a2, 31a3 are arranged on the same straight line. Since the first straight line L1 and the second straight line L2 are parallel to the X axis, the first straight line L1 is a straight line parallel to the second straight line L2.

As shown in FIG. 4, the control substrate 41b is arranged with a gap from the metal base plate 41a via a plurality of spacers 41c. Further, the control board 41b is fixed to the metal base plate 41a by a plurality of fastening bolts (fasteners) 41d. As shown in FIGS. 4 and 5, the three through holes 41b1, 41b2, 41b3 are the first fastening position P1 and the second fastening position P2 on the first straight line L1 connecting the pair of fastening bolts 41d in the control board 41b. It is placed in the area sandwiched between.

As shown in FIG. 5, the end portion 41b4 of the control board 41b is arranged in a straight line extending in parallel with the first straight line L1 and the second straight line L2. Then, when the control board 41b is viewed in a plan view, the end portion 41b4 of the control board 41b is arranged at a position sandwiched between the first straight line L1 and the second straight line L2. That is, when the control board 41b is viewed in a plan view, the three through holes 41b1, 41b2, 41b3 and the three motor connection terminals 31a1, 31a2, 31a3 are arranged so as to be visible.

As shown in FIGS. 3 and 4, the insulated terminal portion 31 is attached to the motor housing 12 by the motor connecting terminals 31a1, 31a2, 31a3 that electrically connect the electric motor 30 and the connecting portion 50, and the fastening bolt 32. It has a metal plate 31b and an insulator 31c arranged so as to surround the motor connection terminals 31a1, 31a2, 31a3.

The three motor connection terminals 31a1, 31a2, 31a3 shown in FIGS. 3 and 4 are electrically connected to each of the U terminal, V terminal, and W terminal of the electric motor 30. The motor connection terminals 31a1, 31a2, 31a3 are formed in a shaft shape protruding from the internal space IS of the motor housing 12 to the external space OS. The motor connection terminals 31a1, 31a2, 31a3 are integrally formed with a vitrified body (not shown), and the vitrified body insulates the metal plate 31b.

The insulator 31c is a member formed in a substantially cylindrical shape using a material having an insulating property, and motor connection terminals 31a1, 31a2, 31a3 are arranged so as to pass through the inside. The insulator 31c secures an insulation distance between the connecting portion 50 and the metal plate 31b.

The connection portion 50 is a metal member that electrically connects the motor connection terminal 31a1 and the through hole 41b1, the motor connection terminal 31a2 and the through hole 41b2, and the motor connection terminal 31a3 and the through hole 41b3, respectively. The connecting portion 50 is formed, for example, by punching a sheet metal.

The connection portion 50 is provided corresponding to each of the three motor connection terminals 31a1, 31a2, 31a3. The connection portion 50 includes a plate-shaped joint portion 51 joined to the motor connection terminals 31a1, 31a2, 31a3, and a shaft having one end connected to the joint portion 51 and the other end connected to the through holes 41b1, 41b2, 41b3. It has a shape-like connecting portion 52 and.

Since the joint portion 51 is formed in a plate shape, the connecting portion 50 has a larger weight and heat capacity than in the case where the joint portion 51 is formed in a rod shape. Further, since the connecting portion 52 has a plurality of bent portions as described later, the total length and the heat capacity are larger than those in the case where the connecting portion 52 does not have the bent portion. Since the heat capacity of the connecting portion 50 is large, the heat transferred from the tool that melts the solder when joining to the motor connection terminals 31a1, 31a2, 31a3 is sufficiently stored in the joining portion 51, and the heat is transferred to the connecting portion 52. can do.

FIG. 6 is a view of the vicinity of the connection portion 50 shown in FIG. 3 along the X axis. As shown in FIG. 6, the joint portion 51 has a width W2 wider than the width W1 in the Y-axis direction of the motor connection terminal 31a3. As shown in FIG. 5, the surface of the joint portion 51 on the motor connection terminal 31a3 side is a joint surface 51a joined to the motor connection terminal 31a3. The motor connection terminal 31a3 and the joint surface 51a are joined by, for example, solder SO, which is an alloy of tin and lead. The motor connection terminal 31a3 and the joint surface 51a may be joined by, for example, arc welding.

Although FIG. 6 shows a connection portion 50 that connects the motor connection terminal 31a3 and the through hole 41b3, the connection portion 50 that connects the motor connection terminal 31a1 and the through hole 41b1 and the motor connection terminal 31a2 and the through portion 50 are shown. Since the structure of the connecting portion 50 connecting the holes 41b2 is the same, the description thereof will be omitted.

The connecting portion 52 is an axial member formed so that the cross-sectional shapes at each position are substantially the same, and is orthogonal to the first arm portion 52a extending along the first axis A1 and the first axis A1. It has a second arm portion 52b extending along the second axis A2 and a third arm portion 52c extending along the third axis A3 orthogonal to the first axis A1. Since the first axis A1 and the second axis A2 are orthogonal to each other, the angle θ1 formed by the first axis A1 and the second axis A2 is 90 °. Further, since the first axis A1 and the third axis A3 are orthogonal to each other, the angle θ2 formed by the first axis A1 and the third axis A3 is 90 °.

The angle θ1 formed by the first axis A1 and the second axis A2 is set to another angle different from 90 ° and does not include 0 ° so that the first axis A1 and the second axis A2 intersect. May be good. Similarly, the angle θ2 formed by the first axis A1 and the third axis A3 is set to another angle different from 90 ° and does not include 0 ° so that the first axis A1 and the third axis A3 intersect. You may.

The first arm portion 52a is a shaft-shaped member having one end connected to the second arm portion 52b and the other end connected to the third arm portion 52c. As shown in FIG. 6, the first arm portion 52a extends along a direction orthogonal to a direction parallel to the Z axis on which the motor connection terminal 31a3 extends. Further, the first arm portion 52a is arranged at a position sandwiched between the joint portion 51 and the control board 41b in the direction along the Z axis.

Since the first arm portion 52a is arranged at a position sandwiched between the joint portion 51 and the control board 41b, a part of the first arm portion 52a (the portion corresponding to the width W2 in FIG. 6) is the joint portion 51 and Y. Overlapping in the axial direction. Therefore, the length of the connecting portion 52 in the Y-axis direction can be reduced as compared with the case where these are not overlapped.

A first gap 53a having a predetermined distance or more in the Z-axis direction is formed between the first arm portion 52a and the joint portion 51. The first gap 53a is a gap that prevents the first arm portion 52a from coming into contact with the joint portion 51 when the connecting portion 52 is elastically deformed due to vibration and the elastic deformation is less than a desired amount of deformation. Is.

The second arm portion 52b is a shaft-shaped member whose one end is connected to the first arm portion 52a and the other end is joined to the through hole 41b3. The ends of the second arm 52b on the control board 41b side are joined by solder SO in a state of being inserted into the through holes 41b3. The second arm portion 52b is joined to the through hole 41b3 by the solder SO, so that the second arm portion 52b is electrically connected to the through hole 41b3.

The third arm portion 52c is a shaft-shaped member having one end connected to the joint portion 51 and the other end connected to the first arm portion 52a. The third arm portion 52c is connected to the joint portion 51 at a position farthest from the control board 41b in the Z-axis direction. Therefore, the length of the third arm portion 52c is longer than that in the case of connecting to the joint portion 51 at a position close to the control board 41b in the Z-axis direction.

A second gap 53b having a predetermined distance or more in the Y-axis direction is formed between the third arm portion 52c and the joint portion 51. The second gap 53b is a gap that prevents the third arm portion 52c from coming into contact with the joint portion 51 when the connecting portion 52 is elastically deformed due to vibration and the elastic deformation is less than a desired amount of deformation. Is.

As shown in FIG. 6, one end of the connecting portion 52 of the present embodiment is joined to the joining portion 51, and the other end is joined to the through hole 41b3 of the control board 41b. Therefore, when the relative position of the control board 41b with respect to the motor housing 12 in the XYZ space changes due to the vibration of the compressor 20 and the electric motor 30, the connecting portion 52 becomes a through hole 41b3 of the second arm portion 52b with respect to the joint portion 51. The position of the joint part of is changed.

Then, the connecting portion 52 of the present embodiment can change the direction in which the arm portion extends in order to follow the change in the position of the joint portion of the second arm portion 52b with the through hole 41b3 with respect to the joint portion 51. It has three bends. The first bent portion B1 is formed at a connection position between the first arm portion 52a and the second arm portion 52b. The second bent portion B2 is formed at a connection position between the first arm portion 52a and the third arm portion 52c. The third bent portion B3 is formed at a connection position between the third arm portion 52c and the joint portion 51.

When the position of the joint portion of the second arm portion 52b with the through hole 41b3 of the second arm portion 52b changes so as to be close to the joint portion 51, the angle θ1 of the first bent portion B1 and the angle of the second bent portion B2 of the connecting portion 52 θ2 is reduced, and the third arm portion 52c is displaced so that the third bending portion B3 widens the second gap 53b. As a result, the axially formed connecting portion 52 is in a contracted state. As the connecting portion 52 contracts, it follows a change in the position of the through hole 41b3 with respect to the joining portion 51. Therefore, the stress applied to the joint portion between the connecting portion 52 and the motor connection terminal 31a3 and the joint portion between the connecting portion 52 and the through hole 41b3 is reduced.

Further, when the position of the joint portion of the second arm portion 52b with respect to the through hole 41b3 of the second arm portion 52b changes so as to be separated from the joint portion 51, the angle θ1 of the first bent portion B1 and the second bent portion B2 The angle θ2 is increased, and the third arm portion 52c is displaced so that the third bending portion B3 narrows the second gap 53b. As a result, the axially formed connecting portion 52 is in an extended state. The extension of the connecting portion 52 follows a change in the position of the through hole 41b3 with respect to the joining portion 51. Therefore, the stress applied to the joint portion between the connecting portion 52 and the motor connection terminal 31a3 and the joint portion between the connecting portion 52 and the through hole 41b3 is reduced.

In the above, the contraction and expansion of the connecting portion 52 following the vibration has been described with reference to the YZ plane shown in FIG. 6, but the same applies to the XY plane and the XZ plane. That is, since the connecting portion 52 has a mechanism of contracting and expanding in accordance with vibration, the connecting portion 52 and the connecting portion 52 of the motor connecting terminal 31a3 and the connecting portion 52 are subjected to displacement in an arbitrary direction in the XYZ space. It is displaced so as to reduce the stress applied to the joint portion with the through hole 41b3.

Next, a method of manufacturing the inverter device 40 according to the present embodiment will be described with reference to FIG. 7. In the following description, only a part of the steps in the method of manufacturing the inverter device 40 will be described, and the description of the other steps will be omitted. Specifically, only the joining step of the motor connection terminals 31a1, 31a2, 31a3 and the through holes 41b1, 41b2, 41b3 will be described, and the description of other steps will be omitted.

In step S101, the worker who manufactures the inverter device 40 arranges the insulating terminal portion 31 in the opening 12A of the motor housing 12, and fastens the fastening bolt 32 through the through hole formed in the metal plate 31b. As a result, the insulated terminal portion 31 is installed in the opening portion 12A of the motor housing 12.

In step S102, the worker who manufactures the inverter device 40 installs the control board 41b on the motor housing 12. Specifically, the operator fixes the metal base plate 41a with screws (not shown) so as to be in close contact with the flat outer peripheral wall of the motor housing 12. Further, the operator arranges the control board 41b with a gap from the metal base plate 41a via the plurality of spacers 41c, and fixes the control board 41b to the metal base plate 41a with the fastening bolts 41d. As a result, the control board 41b is fixed to the motor housing 12 via the metal base plate 41a.

In step S103, the operator who manufactures the inverter device 40 joins each of the motor connection terminals 31a1, 31a2, 31a3 and the joint portion 51 of the connection portion 50 by soldering or welding. Here, an example of joining each of the motor connection terminals 31a1, 31a2, 31a3 and the joint portion 51 with solder will be described with reference to FIGS. 8 to 10. 8 to 10 are partially enlarged views of the vicinity of the connection portion 50 shown in FIG. 3 along the Y axis.

In FIGS. 8 to 10, reference numeral T indicates a tool for melting the solder. The tool T is, for example, a soldering robot that can move to an arbitrary position in the XYZ space and automatically supply solder. The operator sets the position for joining the motor connection terminals 31a1, 31a2, 31a3 and the joint portion 51 in advance with respect to the control device (not shown) for controlling the tool T, so that the motor connection terminals 31a1, The tool T can be made to solder the 31a2 and 31a3 and the joint portion 51.

In step S103 (first joining step), the worker who manufactures the inverter device 40 temporarily attaches the three connecting portions 50 to the motor connecting terminals 31a1, 31a2, 31a3 with an adhesive or the like before soldering with the tool T. Stop it. At that time, the operator assumes that the end portion of the second arm portion 52b is inserted into each of the through holes 41b1, 41b2, 41b3.

After that, the worker who manufactures the inverter device 40 operates a control device (not shown) that controls the tool T. The control device solders the motor connection terminal 31a1 and the joint 51, then solders the motor connection terminal 31a2 and the joint 51, and finally solders the motor connection terminal 31a3 and the joint 51. Is preset to.

First, the tool T moves to the position of the motor connection terminal 31a2. Then, the tool T melts the solder while moving the motor connection terminal 31a1 and the joint portion 51 from above to below along the Z axis, for example, and joins the motor connection terminal 31a1 and the joint portion 51 with solder (FIG. 6). 8). As shown in FIG. 9, the motor connection terminal 31a1 and the joint portion 51 are in a state of being joined by the solidified solder SO.

Second, the tool T moves to the position of the motor connection terminal 31a2. Then, the tool T melts the solder while moving the motor connection terminal 31a2 and the joint portion 51 from above to below along the Z axis, for example, and joins the motor connection terminal 31a2 and the joint portion 51 with solder (FIG. 6). 9). As shown in FIG. 10, the motor connection terminal 31a2 and the joint portion 51 are in a state of being joined by the solidified solder SO.

Third, the tool T moves to the position of the motor connection terminal 31a3. Then, the tool T melts the solder while moving the motor connection terminal 31a3 and the joint portion 51 from above to below along the Z axis, for example, and joins the motor connection terminal 31a3 and the joint portion 51 with solder (FIG. 10). As shown in FIG. 11, the motor connection terminal 31a3 and the joint portion 51 are in a state of being joined by the solidified solder SO. As described above, step S103 is a step of continuously joining the plurality of joint portions 51 temporarily fixed to the plurality of motor connection terminals 31a1, 31a2, 31a3 arranged adjacent to each other.

In step S104 (second joining step), the worker who manufactures the inverter device 40 joins the through holes 41b1, 41b2, 41b3 and the connecting portion 52 by soldering or welding. Here, an example of joining each of the through holes 41b1, 41b2, 41b3 and the connecting portion 52 with solder will be described with reference to FIGS. 11 and 12. FIG. 11 is a partially enlarged view of the vicinity of the connecting portion 50 shown in FIG. 3 along the Y axis. FIG. 12 is a plan view of the vicinity of the connection portion 50 shown in FIG. 3 as viewed from above, and is a diagram showing the position of the tool T.

In addition, the operator sets the position where the through holes 41b1, 41b2, 41b3 and the connecting portion 52 are joined in advance with respect to the control device (not shown) for controlling the tool T, so that the through holes 41b1, The tool T can be made to solder the 41b2, 41b3 and the connecting portion 52.

In step S104, the operator who manufactures the inverter device 40 operates a control device (not shown) that controls the tool T. The control device is preset so that the through hole 41b1 and the connecting portion 52 are soldered, then the through hole 41b2 and the connecting portion 52 are soldered, and finally the through hole 41b3 and the connecting portion 52 are soldered. Has been done.

In step S104, the tool T moves to the position of the through hole 41b1, melts the solder in the through hole 41b1, and joins the through hole 41b1 and the end portion of the second arm portion 52b. After that, the tool T moves to the position of the through hole 41b2, melts the solder in the through hole 41b2, and joins the through hole 41b2 and the end portion of the second arm portion 52b.

Finally, the tool T moves to the position of the through hole 41b3, melts the solder in the through hole 41b3, and joins the through hole 41b3 and the end portion of the second arm portion 52b. As shown in FIG. 11, the through holes 41b1, 41b2, 41b3 and the connecting portion 52 are in a state of being joined by the solidified solder SO. As described above, the motor connection terminals 31a1, 31a2, 31a3 and the through holes 41b1, 41b2, 41b3 are electrically joined via the connection portion 50. Step S104 is a step of continuously joining the plurality of connecting portions 52 inserted into the plurality of through holes 41b1, 41b2, 41b3 arranged adjacent to each other.

When joining the end portions of the through hole 41b1 and the second arm portion 52b, the second arm portion 52b inserted into the through hole 41b1 is seconded by the heat transferred from the joining portion 51 heated by step S103. The temperature is higher than that of the external space OS around the arm portion 52b. Similarly, when joining the end portions of the through hole 41b2 and the second arm portion 52b, the second arm portion 52b inserted into the through hole 41b2 is subjected to the heat transferred from the joining portion 51 heated by step S103. , The temperature is higher than that of the external space OS around the second arm portion 52b.

Further, when joining the end portions of the through hole 41b2 and the second arm portion 52b, the second arm portion 52b inserted into the through hole 41b2 is subjected to the heat transferred from the joining portion 51 heated in step S103. The temperature is higher than that of the external space OS around the second arm portion 52b.

As shown in FIG. 12, when the control board 41b is viewed in a plan view, the three motor connection terminals 31a1, 31a2, 31a3 are not hidden in the control board 41b, so that when the tool T for soldering or welding is moved. In addition, a detour operation is not required to avoid contact with the control board 41b. Further, since the three motor connection terminals 31a1, 31a2, 31a3 can be visually recognized when the control board 41b is viewed in a plan view, for example, soldering or welding with the tool T while imaging the motor connection terminals 31a1, 31a2, 31a3 with a camera or the like. It can be performed.

In the above, an example of joining the motor connection terminals 31a1, 31a2, 31a3 and the connection portion 50 and joining the through holes 41b1, 41b2, 41b3 and the connection portion 50 by soldering has been described, but the same applies to welding. is there. For example, the tool T for joining by arc welding melts a part of the motor connection terminals 31a1, 31a2, 31a3 and a welding rod (not shown) instead of melting the solder. Further, the tool T melts a part of the through holes 41b1, 41b2, 41b3 and a welding rod (not shown) instead of melting the solder.

The operation and effect of the inverter-integrated electric compressor 100 of the present embodiment described above will be described.
According to the inverter-integrated electric compressor 100 of the present embodiment, at least three shaft-shaped motor connection terminals 31a1, 31a2, 31a3 of the electric motor 30 and three through holes 41b1, 41b2, 41b3 of the control board 41b. Are electrically connected by a metal connecting portion 50. The connecting portion 50 has a joining portion 51 and a connecting portion 52, the joining portion 51 is joined to the motor connection terminals 31a1, 31a2, 31a3 by soldering or welding, and the connecting portion 52 is joined to the through holes 41b1, 41b2, 41b3 by soldering or welding. Is joined to.

Since the three through holes 41b1, 41b2, 41b3 are arranged on the same straight line on the control board 41b, soldering or welding is performed when the three through holes 41b1, 41b2, 41b3 are joined by soldering or welding. The amount of movement of the tool T is minimized, and it is not necessary to change the movement direction. Therefore, the workability of the work required for electrically connecting the three motor connection terminals 31a1, 31a2, 31a3 of the electric motor 30 and at least three through holes 41b1, 41b2, 41b3 of the control board 41b is improved. Can be made to.

Further, according to the inverter-integrated electric compressor 100 of the present embodiment, the first fastening position P1 and the second fastening position P2 are securely fixed to the metal base plate 41a. Therefore, the through holes 41b1, 41b2, 41b3 arranged in the region sandwiched between the pair of fastening positions on the second straight line L2 connecting the first fastening position P1 and the second fastening position P2 are arranged at other positions. The displacement with respect to the metal base plate 41a is smaller than in the case, and it is less likely to receive stress due to vibration of the compressor 20 and the electric motor 30.

Further, according to the inverter-integrated electric compressor 100 of the present embodiment, since the three motor connection terminals 31a1, 31a2, 31a3 are arranged on the same straight line, the three motor connection terminals 31a1, 31a2, 31a3 are soldered. Alternatively, when joining by welding, the amount of movement of the tool T to be soldered or welded is minimized, and it is not necessary to change the moving direction.

Further, since the first straight line L1 in which the three motor connection terminals 31a1, 31a2, 31a3 are arranged and the second straight line L2 in which the three through holes 41b1, 41b2, 41b3 are arranged are parallel, the three motor connection terminals When the tool T is moved to join the three through holes 41b1, 41b2, 41b3 by soldering or welding after joining 31a1, 31a2, 31a3 by soldering or welding, the amount of movement of the tool T can be reduced. ..

Further, according to the inverter-integrated electric compressor 100 of the present embodiment, when the control board 41b is viewed in a plan view, the three motor connection terminals 31a1, 31a2, 31a3 are located at positions separated from the end 41b4 of the control board 41b. It will be arranged. When the control board 41b is viewed in a plan view, the three motor connection terminals 31a1, 31a2, 31a3 are not hidden behind the control board 41b, so that they come into contact with the control board 41b when the tool T for soldering or welding is moved. There is no need for a detour operation to avoid. Further, since the three motor connection terminals 31a1, 31a2, 31a3 can be visually recognized when the control board 41b is viewed in a plan view, for example, soldering or welding with the tool T while imaging the motor connection terminals 31a1, 31a2, 31a3 with a camera or the like. It can be performed.

Further, according to the inverter-integrated electric compressor 100 of the present embodiment, since the plate-shaped joint portion 51 has a larger area and heat capacity than the motor connection terminals 31a1, 31a2, 31a3, the joint portion 51 by soldering or welding or the like is used. And the motor connection terminals 31a1, 31a2, 31a3 can be easily joined, and sufficient joining strength can be obtained.

[Other Embodiments]
In the above description, the joining portions 51 are continuously joined to the plurality of motor connection terminals 31a1, 31a2, 31a3 arranged adjacent to each other in step S103, and then are contacted and arranged in step S104. Although the connecting portion 52 is continuously joined to the plurality of through holes 41b1, 41b2, 41b3, other embodiments may be used.

For example, after joining the motor connection terminal 31a1 and the joining portion 51, the through hole 41b1 and the connecting portion 52 are joined, and after joining the motor connection terminal 31a2 and the joining portion 51, the through hole 41b2 and the connecting portion 52 are joined to connect the motor. After joining the terminal 31a3 and the joining portion 51, the through hole 41b3 and the connecting portion 52 may be joined. In this case, since the connecting portion 52 connected to the joining portion 51 is joined immediately after the joining portion 51 is joined, the joining portion 52 can be joined at a higher temperature.

In the above description, the electric motor 30 has three motor connection terminals 31a1, 31a2, 31a3, and the control board 41b has three through holes 41b1, 41b2, 41b3, but it is another embodiment. May be good. For example, the electric motor 30 may have four or more motor connection terminals, and the control board 41b may have four or more through holes corresponding thereto. That is, the electric motor 30 may have at least three motor connection terminals, and the control board may have at least three through holes.

10 Housing
11 Compressor housing 12 Motor housing 12A Opening 20 Compressor (compressor)
30 Electric motor 31 Insulated terminal 31a1, 31a2, 31a3 Motor connection terminal (first connection terminal)
40 Inverter device 41 Inverter module 41a Metal base plate (base)
41b Control board 41b1, 41b2, 41b3 Through hole (second connection terminal)
41b4 End 41c Spacer 41d Fastening bolt (fastener)
50 Connection part 51 Joint part 51a Joint surface 52 Connection part 100 Inverter integrated electric compressor (electric motor control device)
IS internal space L1 1st straight line L2 2nd straight line OS external space (surrounding space)
P1 1st fastening position P2 2nd fastening position SO Solder T Tool

Claims (2)

It is a manufacturing method of an electric motor control device.
The electric motor control device is
With an electric motor
A control board that controls the electric motor and
A metal connecting portion for electrically connecting the electric motor and the control board is provided.
The electric motor has a first connection terminal and has a first connection terminal.
The control board has a second connection terminal corresponding to the first connection terminal.
The connection part
A joint to be joined to the first connection terminal by soldering or welding,
One end is connected to the joint and the other end is connected to the second connection terminal by soldering or welding.
The first joining step of joining the first connection terminal and the joining portion by soldering or welding,
A second joining terminal and the connecting portion by soldering or welding while the connecting portion is at a higher temperature than the surrounding space due to the heat transferred from the joining portion heated by the first joining step. A method of manufacturing an electric motor control device including a joining process. The electric motor has a plurality of the first connection terminals.
The control board has a plurality of the second connection terminals corresponding to the plurality of the first connection terminals.
The first joining step is a step of continuously joining a plurality of the first connection terminals arranged adjacent to each other and the plurality of the joining portions.
The second joining step is a step of continuously joining a plurality of the second connecting terminals arranged adjacent to each other and the plurality of the connecting portions after the first joining step is executed. The method for manufacturing an electric motor control device according to the description.

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