JPWO2020040278A1 - Inverter unit, motor unit - Google Patents

Abstract

An inverter unit including a power unit including an inverter circuit, a capacitor connected to the power unit, a cooling unit for cooling the power unit, and an inverter housing for accommodating the power unit, the capacitor, and the cooling unit. The inverter housing has a bottom wall, a tubular side wall extending upward from the peripheral edge of the bottom wall, and a motor connection portion for fixing the lower surface of the bottom wall toward the motor. The cooling unit and the condenser are arranged on the bottom wall side by side along the upper surface of the bottom wall. The power unit is located above the cooling unit, the lower surface of the capacitor is located below the lower surface of the cooling unit, and the upper surface of the power unit and the upper surface of the capacitor are arranged along the same plane. [Selection diagram] Fig. 3

Description

The present invention relates to an inverter unit and a motor unit.

Conventionally, an inverter unit including an inverter and a case for accommodating the inverter for controlling a motor is known. Japanese Publication No. 2003-199363 discloses an electric drive unit (inverter unit) that is stacked and fixed in the order of the size of each component in consideration of compactness, assemblability, manufacturability, earthquake resistance, and the like. NS.

Japan Publication No. 2003-199363

In a motor unit in which an inverter unit and a motor case are connected, vibration during motor drive is transmitted to the inverter unit, so that an inverter unit that is not easily affected by vibration has been required.

According to one aspect of the present invention, it is an inverter unit that can be attached to a motor, and includes a power unit including an inverter circuit, a capacitor connected to the power unit, a cooling unit that cools the power unit, and the power. The inverter housing includes a portion, a capacitor, and an inverter housing for accommodating the cooling portion. The inverter housing includes a bottom wall, a tubular side wall extending upward from the peripheral edge of the bottom wall, and a lower surface of the bottom wall. The cooling unit and the capacitor are arranged on the bottom wall in a direction along the upper surface of the bottom wall, and the power unit is the power unit. An inverter unit located above the cooling unit, the lower surface of the capacitor is located below the lower surface of the cooling unit, and the upper surface of the power unit and the upper surface of the capacitor are arranged along the same plane. Is provided.

The present invention provides, for example, an inverter unit that is not easily affected by vibration from a motor, and a motor unit including the inverter unit.

FIG. 1 is a perspective view of the inverter unit of the present embodiment as viewed from above. FIG. 2 is a perspective view of the inverter unit of the present embodiment as viewed from below. FIG. 3 is a cross-sectional view of the inverter unit of the present embodiment. FIG. 4 is a plan view showing the internal structure of the inverter unit of the present embodiment. FIG. 5 is an exploded perspective view showing the structure of the power supply connection portion. FIG. 6 is a partial cross-sectional view showing the structure of the circuit connection portion. FIG. 7 is a perspective view showing the second terminal support base.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following description, the direction of gravity will be defined based on the positional relationship when the inverter unit 1 is mounted on a vehicle located on a horizontal road surface. Further, in the drawings, the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate. In the XYZ coordinate system, the Z-axis direction indicates the vertical direction (that is, the vertical direction), the + Z direction is the upper side (opposite the gravity direction), and the −Z direction is the lower side (gravity direction). Further, the X-axis direction is a direction orthogonal to the Z-axis direction, and in the present embodiment, a direction along the short side of the inverter unit 1 is shown. The Y-axis direction is a direction orthogonal to both the X-axis direction and the Z-axis direction, and in the present embodiment, indicates a direction along the long side of the inverter unit 1.

As shown in FIG. 3, the inverter unit 1 is provided in the motor unit 3. The motor unit 3 includes an inverter unit 1 and a motor 2. The inverter unit 1 is installed on the upper surface of the motor 2. Therefore, the lower surface of the inverter unit 1 is the motor connection portion 10A connected to the motor 2. The motor connection portion 10A is a portion that mechanically connects the inverter unit 1 and the motor 2. Bolt fastening can be used as the connection structure between the inverter unit 1 and the motor 2. If it is not necessary to attach / detach the inverter unit 1 and the motor 2, rivet fastening or welding may be used. A bracket may be attached to the motor connection portion 10A, and the inverter unit 1 and the motor 2 may be connected via the bracket.
The motor 2 is supplied with an alternating current from the inverter unit 1. The motor 2 is controlled by the inverter unit 1. The inverter unit 1 is connected to the coil wire of the stator of the motor 2.

The motor unit 3 of the present embodiment is mounted on a vehicle powered by a motor, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and an electric vehicle (EV), and is used as the power source thereof. The motor unit 3 may include a speed reducer (not shown) for decelerating the rotation of the motor 2.

The inverter unit 1 converts a direct current into an alternating current and supplies it to the motor 2. As shown in FIGS. 1 to 4, the inverter unit 1 includes an inverter housing 10, a control board 20, a power unit 30 including an inverter circuit, a capacitor 40, and a plurality of externally connected bus bars 50.

The inverter housing 10 has a lower case 11 and a cover member 12 attached to the opening of the lower case 11. The lower case 11 has a bottom wall 11a and a tubular side wall 11b extending upward from the peripheral edge of the bottom wall 11a. The cover member 12 has a top wall 12a and a tubular side wall 12b extending downward from the peripheral edge of the top wall 12a. The lower case 11 and the cover member 12 are bolted together with the upper end surface 11c of the side wall 11b and the lower end surface 12c of the side wall 12b facing each other.

The lower case 11 has a storage chamber 13 surrounded by a bottom wall 11a and a side wall 11b. The control board 20, the power unit 30, the capacitor 40, and the external connection bus bar 50 are arranged inside the accommodation chamber 13 when viewed from above.
The containment chamber 13 includes a first containment chamber 13A and a second containment chamber 13B which are horizontally partitioned. That is, the inverter housing 10 has a first storage chamber 13A and a second storage chamber 13B. The first accommodation chamber 13A and the second accommodation chamber 13B are arranged along the long side direction (Y-axis direction) of the inverter housing 10. The power unit 30 and the external connection bus bar 50 are arranged in the first accommodation chamber 13A. The control board 20 and the capacitor 40 are arranged in the second accommodating chamber 13B.

As shown in FIG. 4, the first storage chamber 13A has a substantially rectangular shape in a plan view. As shown in FIGS. 2 and 3, a cooling unit 60 is provided at the bottom of the first storage chamber 13A. That is, the inverter unit 1 includes a cooling unit 60. The cooling unit 60 has a refrigerant flow path 11d. The refrigerant flow path 11d is a recess that opens on the upper surface side of the bottom wall 11a. The refrigerant flow path 11d has a substantially rectangular shape in a plan view. The refrigerant flow path 11d is connected to the pipe connection terminals 14 and 15 on the side surface of the lower case 11 via a tubular flow path penetrating the bottom wall 11a. The pipe connection terminals 14 and 15 are connected to an external refrigerant pipe. The power unit 30 is fixed on the refrigerant flow path 11d.

The power unit 30 includes a power board 31 and a semiconductor module 32 located below the power board 31. In the case of this embodiment, the power substrate 31 and the semiconductor module 32 are both flat plates.

The semiconductor module 32 incorporates a three-phase inverter having six IGBTs (insulated gate bipolar transistors) in a case. As shown in FIG. 3, the semiconductor module 32 has a heat sink 32a composed of a plurality of columnar bodies extending downward from the lower surface of the semiconductor module 32. The semiconductor module 32 is fixed to the bottom wall 11a with the refrigerant flow path 11d covered from above. The heat sink 32a is arranged in the refrigerant flow path 11d. A ring-shaped sealing member 33 is arranged around the refrigerant flow path 11d. The refrigerant flow path 11d is sealed by a sealing member 33 sandwiched between the upper surface of the bottom wall 11a and the semiconductor module 32.

A power substrate 31 for driving the semiconductor module 32 is arranged on the upper surface of the semiconductor module 32. The power substrate 31 and the semiconductor module 32 are electrically connected to each other via a plurality of connection pins 34 extending upward from the semiconductor module 32. In the present embodiment, the semiconductor module 32 is located on the cooling unit 60, and the power substrate 31 is located on the semiconductor module 32. According to this configuration, since the semiconductor module 32, which is more likely to generate heat than the power substrate 31, is arranged directly above the cooling unit 60, the entire power unit 30 can be efficiently cooled. Further, by arranging the power board 31 connected to the control board 20 above the semiconductor module 32, electrical connection between the boards becomes easy.

As shown in FIG. 4, the second storage chamber 13B has a substantially rectangular shape elongated in the X-axis direction with respect to the first storage chamber 13A. The capacitor 40 is fixed to the bottom of the second storage chamber 13B. The control board 20 is fixed to the upper surface of the capacitor 40 via the bracket 25. The bracket 25 insulates the circuit component mounted on the lower surface of the control board 20 from the capacitor 40. The bracket 25 may be fixed to the inverter housing 10. Further, if possible, the control board 20 may be directly fixed to the upper surface 40b of the capacitor 40.

The control board 20 supplies a drive signal to the motor 2 via the power unit 30 to control the motor 2. The control board 20 is electrically connected to an encoder such as a resolver provided in the motor unit 3. The control board 20 feedback-controls the rotation speed of the motor 2 based on the rotation information of the motor 2 output from the encoder.

In the inverter unit 1 of the present embodiment, as shown in FIG. 3, the cooling unit 60 and the condenser 40 are arranged in a direction along the upper surface of the bottom wall 11a of the lower case 11 (Y-axis direction in the present embodiment). Be placed. The power unit 30 is located above the cooling unit 60, and the lower surface 40a of the condenser 40 is located below the lower surface 60a of the cooling unit 60.

In the present embodiment, the lower surface 60a of the cooling unit 60 is the lower surface of the two case projecting portions 61a and 61b protruding downward from the lower surface of the lower case 11 as shown in FIGS. 2 and 3. A tubular flow path for connecting the refrigerant flow path 11d and the pipe connection terminal 14 is provided inside the case protrusion 61a, and the refrigerant flow path 11d and the pipe connection terminal 15 are connected inside the case protrusion 61b. A tubular flow path is provided. Therefore, the lower surface 60a of the cooling unit 60 is the lowermost surface of the portions constituting the flow path of the refrigerant in the lower case 11.

According to the above configuration, the lower surface 40a of the condenser 40 is located on the lowermost side of the power section 30, the condenser 40, and the cooling section 60. Therefore, in the inverter unit 1 of the present embodiment having the motor connection portion 10A on the lower surface, the heavy capacitor 40 is arranged at the position closest to the motor 2. When the inverter unit 1 is shaken by the vibration transmitted from the motor 2, the amplitude becomes larger as the position is farther from the motor 2. By adopting the above configuration, the amplitude of the capacitor 40 arranged near the motor 2 can be made relatively small. By reducing the amplitude of the heaviest capacitor 40, the stress acting on the inverter unit 1 due to vibration can be reduced. Therefore, according to the present embodiment, the inverter unit 1 that is not easily affected by the vibration of the motor 2 is provided.

Further, in the present embodiment, the upper surface 30a of the power unit 30 and the upper surface 40b of the capacitor 40 are arranged along the same plane. That is, the upper surface 30a of the power unit 30 and the upper surface 40b of the capacitor 40 are substantially parallel to each other. The parallelism between the upper surface 30a and the upper surface 40b is within ± 5 °. The parallel angle is preferably within ± 1 °. In the present embodiment, the upper surface 30a of the power unit 30 is the upper surface of the power substrate 31. When the semiconductor module 32 is arranged above the power substrate 31 in the power unit 30, the upper surface 30a of the power unit 30 is the upper surface of the semiconductor module 32.

With the above configuration, in the inverter unit 1 of the present embodiment, the case of the capacitor 40 and the case of the power unit 30 are less likely to interfere with each other. Therefore, in the inverter unit 1, the capacitor 40 and the power unit 30 can be arranged close to each other in the horizontal direction (Y-axis direction). As a result, the wiring connecting the capacitor 40 and the power unit 30 can be shortened. When the wiring of the DC power supply from the power supply to the IGBT, which is a switching element, is long, the inductive reactance of the wiring becomes large, so that the surge voltage at the time of turn-off becomes high. In the present embodiment, the wiring length of the DC power supply to the IGBT can be shortened, so that the surge voltage can be suppressed. If the surge voltage can be suppressed, the switching time of the IGBT can be shortened, so that the efficiency of the inverter can be improved. In addition, the effect of reducing heat generation can be obtained by improving efficiency.

As shown in FIGS. 1 and 4, the capacitor 40 is connected to the external power supply device 9 via the wiring 9a. The wiring 9a is connected to the capacitor input terminal 41 of the capacitor 40 via the wiring terminal 9b provided at the end of the wiring 9a. The external power supply device 9 is, for example, a secondary battery mounted on a vehicle. The inverter unit 1 converts the direct current supplied from the external power supply device 9 into an alternating current and supplies the direct current to the motor 2 via the externally connected bus bar 50.

In the present embodiment, the two wirings 9a are fixed to the inverter housing 10 by the mounting member 9c that supports the wirings 9a. The mounting member 9c is bolted to the outer surface of the side wall 11b of the lower case 11. The wiring 9a extending from the mounting member 9c to the tip end side extends into the second accommodating chamber 13B through the through hole 11e provided in the side wall 11b.

In the second accommodation chamber 13B, the wiring terminal 9b and the capacitor input terminal 41 are fastened with bolts 84. That is, in the second accommodation chamber 13B of the inverter housing 10, a power supply connection portion 80 for connecting the wiring 9a extending from the external power supply device 9 and the capacitor 40 is arranged. According to this configuration, since the wiring 9a is pulled in and connected to the second storage chamber 13B, which is the area for accommodating the capacitor 40, the capacitor 40 and the external power supply device 9 can be connected to each other in the minimum space without using a bus bar. You can connect. Therefore, according to the present embodiment, the inverter unit 1 can be miniaturized.

FIG. 5 is an exploded perspective view showing the power supply connection unit 80.
The power supply connection portion 80 has a bolt (first fixing member) 84 that connects the capacitor input terminal 41 extending from the capacitor 40 and the wiring terminal 9b located at the end of the wiring 9a, and the capacitor input terminal 41 and the wiring terminal 9b on the lower side. It has a first terminal support base 81 that supports from. The bolt 84, which is the first fixing member, fixes the capacitor input terminal 41 and the wiring terminal 9b to the first terminal support base 81.

As shown in FIG. 5, the first terminal support 81 is a rod-shaped member extending in the Y-axis direction along the side surface of the capacitor 40. The first terminal support 81 has two first terminal fixing portions 81a arranged at intervals along the length direction (Y-axis direction). That is, the first terminal support base 81 has a plurality of first terminal fixing portions 81a arranged in a direction intersecting the vertical direction.

The first terminal support 81 has a first partition wall 81b extending in the vertical direction between adjacent first terminal fixing portions 81a. According to this configuration, the wiring terminals 9b can be insulated from each other by the first partition wall 81b. In the case of the present embodiment, the first partition wall 81b is arranged at three places including both ends of the first terminal support 81, and is arranged so as to sandwich the individual first terminal fixing portions 81a in the horizontal direction. In the present embodiment, the first partition wall 81b also functions as a positioning member for the wiring terminal 9b when connecting the capacitor input terminal 41 and the wiring terminal 9b.

The first terminal support 81 has one flange portion 81c at both ends in the length direction. The flange portion 81c has a through hole that penetrates the flange portion 81c in the vertical direction. The first terminal support 81 is fastened to the bottom wall 11a of the lower case 11 by a bolt that is passed through the through hole of the flange portion 81c.

The capacitor input terminal 41 and the wiring terminal 9b of the capacitor 40 are fastened to the first terminal fixing portion 81a of the first terminal support base 81. The capacitor input terminal 41 is arranged on the upper surface of the first terminal fixing portion 81a, and the wiring terminal 9b is arranged so as to overlap the upper surface of the capacitor input terminal 41. The bolt 84 penetrates the capacitor input terminal 41 and the wiring terminal 9b, and is tightened into the screw hole 81d of the first terminal fixing portion 81a. According to this configuration, the capacitor input terminal 41 and the wiring terminal 9b are fixed to the lower case 11 via the first terminal support base 81. Since the wiring 9a and the capacitor 40 are firmly fixed, loosening of the connection due to vibration during use is less likely to occur.

As shown in FIG. 1, the cover member 12 is connected to the upper end of the side wall 11b of the lower case 11 to cover the power portion 30 and the capacitor 40 from above, and the cover main body 12A and the power supply connecting portion 80 provided on the cover main body 12A. It has an access port 12B that opens on the upper side of the access port 12B, and a port cover 12C that is detachably attached to the access port 12B.

As shown in FIG. 4, the port cover 12C is provided at a position that covers the power supply connection portion 80 from above. According to this configuration, the power connection unit 80 can be operated only by removing the port cover 12C from the cover main body 12A. That is, the operator can perform the wiring connection work while covering the cover main body 12A with other parts. As a result, it is possible to suppress the adhesion of dust to the control board 20 and the power unit 30 in the wiring connection work.

In the present embodiment, the bolt 84, which is the first fixing member, extends in the vertical direction and is tightened from the upper side to the lower side. Therefore, the bolt 84 can be operated from above with the port cover 12C or the cover member 12 removed. According to this configuration, the wiring 9a and the capacitor 40 can be easily connected. An inverter unit 1 having excellent assembly workability is provided.

In the inverter unit 1 of the present embodiment, the control board 20 and the power board 31 of the power unit 30 are separate boards, and the control board 20 is arranged above the capacitor 40. In the present embodiment, as shown in FIG. 3, since the bottom surface position of the condenser 40 is lower than that of the cooling unit 60, it is easy to provide a space above the condenser 40. According to this configuration, unevenness on the upper surface of the inverter unit 1 can be alleviated as compared with the configuration in which the control board 20 is arranged on the power unit 30. Therefore, by using the inverter unit 1 in which the control board 20 is arranged on the capacitor 40, the size of the entire motor unit 3 can be reduced.

As shown in FIG. 4, the semiconductor module 32 has six inverter input terminals 35 on the side surface facing the capacitor 40. The inverter input terminal 35 is connected to six capacitor output terminals 42 (see FIG. 6) extending from the capacitor 40 in the circuit connection unit 90 that connects the power unit 30 and the capacitor 40.

FIG. 6 is a cross-sectional view showing the circuit connection portion 90.
The circuit connection unit 90 includes a second terminal support base 91 that supports the inverter input terminal 35 extending from the power unit 30 and the capacitor output terminal 42 extending from the capacitor 40 from below, and the inverter input terminal 35 and the capacitor output terminal 42. It has a bolt (second fixing member) 94 that is connected and fixed to the second terminal support 91.

FIG. 7 is a perspective view of the second terminal support base 91.
The second terminal support 91 is a rod-shaped member extending in the X-axis direction along the side surface of the capacitor 40. The second terminal support 91 has six second terminal fixing portions 91a arranged at intervals along the length direction (X-axis direction). That is, the second terminal support base 91 has a plurality of second terminal fixing portions 91a arranged in a direction intersecting the vertical direction. The second terminal support base 91 and the first terminal support base 81 may be a single member.

The second terminal support 91 has a second partition wall 91b extending in the vertical direction between adjacent second terminal fixing portions 91a. According to this configuration, the inverter input terminal 35 and the capacitor output terminal 42 can be isolated from each other by the second partition wall 91b. In the case of the present embodiment, the second partition wall 91b is arranged at a plurality of locations including both ends of the second terminal support base 91, and is arranged so as to sandwich the individual second terminal fixing portions 91a in the horizontal direction.

The second terminal support 91 has one flange portion 91c at each end in the length direction (X-axis direction). The flange portion 91c has a through hole that penetrates the flange portion 91c in the vertical direction. The flange portion 91c has a positioning pin 91e that projects downward from the tip portion of the flange portion 91c. The positioning pin 91e is inserted into a positioning hole opened on the upper surface of the bottom wall 11a to position the second terminal support base 91 on the bottom wall 11a. The second terminal support base 91 is fastened to the bottom wall 11a of the lower case 11 by a bolt passed through the through hole of the flange portion 91c.

The capacitor output terminal 42 and the inverter input terminal 35 are fastened to the second terminal fixing portion 91a of the second terminal support base 91. As shown in FIG. 6, the inverter input terminal 35 is arranged on the upper surface of the second terminal fixing portion 91a, and the capacitor output terminal 42 is arranged so as to overlap the upper surface of the inverter input terminal 35. The bolt 94 penetrates the capacitor output terminal 42 and the inverter input terminal 35, and is tightened into the screw hole 91d of the second terminal fixing portion 91a. According to this configuration, the capacitor output terminal 42 and the inverter input terminal 35 are fixed to the lower case 11 via the second terminal support base 91. Since the power unit 30 and the capacitor 40 are firmly fixed, loosening of the connection due to vibration during use is less likely to occur.

The second terminal support base 91 has a columnar portion 91f extending in the vertical direction on the back surface side of each of the second terminal fixing portions 91a. The lower end surface of the columnar portion 91f is abutted against the upper surface of the bottom wall 11a. The columnar portion 91f supports the second terminal fixing portion 91a from below when the bolt 94 is tightened into the screw hole 91d. By providing the columnar portion 91f, the lower part of the second terminal support base 91 can be lightened, and the weight of the second terminal support base 91 can be reduced without impairing the strength.

The semiconductor module 32 has three output terminals 36 on the side surface opposite to the capacitor 40. That is, the power unit 30 has a plurality of output terminals 36. The three output terminals 36 are connected to different relay bus bars 57. The three relay bus bars 57 extend in the horizontal direction from the connection position of the power unit 30 with the output terminal 36.

The three relay bus bars 57 are connected to different externally connected bus bars 50. As shown in FIGS. 2 and 3, the three externally connected bus bars 50 are linear metal plates extending in the vertical direction. The external connection bus bar 50 is connected to the relay bus bar 57 at the upper end. In the case of the present embodiment, the external connection bus bar 50 and the relay bus bar 57 are fastened by using bolts 54. A protective cover 55a is put on the connection portion between the external connection bus bar 50 and the relay bus bar 57.

The external connection bus bar 50 extends downward from the connection position with the relay bus bar 57, penetrates the bottom wall 11a of the lower case 11, and extends to the outside of the lower case 11. The externally connected bus bar 50 protruding from the lower case 11 is electrically connected to the stator of the motor 2.

1 ... Inverter unit, 2 ... Motor, 3 ... Motor unit, 9 ... External power supply, 9a ... Wiring, 9b ... Wiring terminal, 10 ... Inverter housing, 10A ... Motor connection, 11a ... Bottom wall, 11b, 12b ... Side wall, 12 ... cover member, 12A ... cover body, 12B ... access port, 12C ... port cover, 13A ... first accommodation chamber, 13B ... second accommodation chamber, 20 ... control board, 30 ... power unit, 30a, 40b ... Top surface, 31 ... Power board, 32 ... Semiconductor module, 35 ... Inverter input terminal, 36 ... Output terminal, 40 ... Capacitor, 40a, 60a ... Bottom surface, 41 ... Capacitor input terminal, 42 ... Capacitor output terminal, 60 ... Cooling Unit, 80 ... Power supply connection part, 84 ... Bolt (first fixing member), 81 ... First terminal support, 81a ... First terminal fixing part, 81b ... First partition wall, 90 ... Circuit connection part, 91 ... 2 terminal support, 91a ... 2nd terminal fixing part, 91b ... 2nd partition wall, 94 ... Bolt (2nd fixing member)

Claims (11)

An inverter unit that can be attached to a motor
A power unit including an inverter circuit, a capacitor connected to the power unit, a cooling unit for cooling the power unit, and an inverter housing for accommodating the power unit, the capacitor, and the cooling unit are provided.
The inverter housing has a bottom wall, a tubular side wall extending upward from the peripheral edge of the bottom wall, and a motor connection portion for fixing the lower surface of the bottom wall toward the motor.
The cooling unit and the condenser are arranged on the bottom wall side by side in a direction along the upper surface of the bottom wall.
The power unit is located above the cooling unit and is located above the cooling unit.
The lower surface of the condenser is located below the lower surface of the cooling unit.
The upper surface of the power unit and the upper surface of the capacitor are arranged along the same plane.
Inverter unit. It has a control board connected to the power unit and has
The control board is located above the capacitor.
The inverter unit according to claim 1. The power unit includes a semiconductor module that converts an electric current and a power substrate that drives the semiconductor module.
The semiconductor module is located on the cooling unit and is located on the cooling unit.
The power substrate is located on the semiconductor module.
The inverter unit according to claim 1 or 2. The inverter housing has a first accommodating chamber for accommodating the power unit and a second accommodating chamber for accommodating the capacitor.
In the second accommodation chamber, a power supply connection portion for connecting the wiring extending from the external power supply device and the capacitor is arranged.
The inverter unit according to any one of claims 1 to 3. The power supply connection portion has a first fixing member that connects a capacitor input terminal extending from the capacitor and a wiring terminal located at the end of the wiring.
The inverter housing has at least a cover member that covers the power supply connection portion from above.
The first fixing member can be operated from above with the cover member removed.
The inverter unit according to claim 4. The cover member is
A cover body that is connected to the upper end of the side wall and covers the power unit and the capacitor from above.
An access port provided on the cover body and opened on the upper side of the power supply connection portion,
A port cover that can be attached and detached to the access port,
Have,
The inverter unit according to claim 5. The power connection is
A first fixing member that connects a capacitor input terminal extending from the capacitor and a wiring terminal located at the end of the wiring.
A first terminal support base that supports the capacitor input terminal and the wiring terminal from below,
Have,
The first fixing member fixes the capacitor input terminal and the wiring terminal to the first terminal support base.
The inverter unit according to claim 5 or 6. The first terminal support base has a plurality of first terminal fixing portions for fixing the capacitor input terminal and the wiring terminal.
The plurality of first terminal fixing portions are arranged side by side in a direction intersecting the vertical direction.
A first partition wall extending in the vertical direction is arranged between the adjacent first terminal fixing portions.
The inverter unit according to claim 7. A circuit connection unit for connecting the power unit and the capacitor is provided in the inverter housing.
The circuit connection is
A second terminal support base that supports the inverter input terminal extending from the power unit and the capacitor output terminal extending from the capacitor from below, and
A second fixing member that connects the inverter input terminal and the capacitor output terminal and fixes them to the second terminal support base.
Have,
The inverter unit according to any one of claims 1 to 8. The second terminal support base has a plurality of second terminal fixing portions for fixing the inverter input terminal and the capacitor output terminal.
The plurality of second terminal fixing portions are arranged side by side in a direction intersecting the vertical direction.
A second partition wall extending in the vertical direction is arranged between the adjacent second terminal fixing portions.
The inverter unit according to claim 9. The inverter unit according to any one of claims 1 to 10 and the inverter unit.
With the motor to which alternating current is supplied from the inverter unit,
A motor unit.

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