Motor Control Device

Abstract

The motor control device (100) is housed in a control panel (200) that has an opening / closing door on the front side and an opening on the rear side. The motor control device (100) includes a housing (1) that forms an outer shell, and a fan (4) that is housed in the housing (1) and cools a semiconductor module (2). A rear opening (11a) is formed in the housing (1) at a position corresponding to the opening formed on the rear side of the control panel (200). The fan (4) can be removed through the rear opening (11a) with at least a portion of the housing (1) housed in the control panel (200).

Description

[Technical field]

[0001] The present disclosure relates to a motor control device that controls the driving of a motor. [Background technology]

[0002] Conventionally, motor control devices that control the drive of a motor are known. The motor control device may be housed inside a control panel together with peripheral devices and wiring. The motor control device has a semiconductor module, a control board, a heat sink, a fan, and the like mounted inside a housing that forms the outer shell. As the fan is a part with a finite lifespan, it is removed from the housing by a maintenance worker and regular maintenance is performed on it.

[0003] For example, Patent Document 1 discloses an inverter unit in which a fan and the like are mounted inside a housing having a substantially rectangular parallelepiped shape. The fan of the inverter unit can be removed by removing the front panel of the housing. An opening for removing the fan is formed in a side panel of the housing adjacent to the front panel. This allows the fan of the inverter unit to be removed from the opening of the side panel as well, without removing the front panel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-114971 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the inverter unit disclosed in Patent Document 1 is stored in a control panel, the front panel of the housing cannot be removed to remove the fan without opening the door of the control panel, and the fan cannot be removed from the opening of the side panel. In order to open the door of the control panel, the power supply may be cut off and the system may be temporarily stopped. Therefore, every time maintenance of the fan is performed, it is necessary to check the operating status of the system in the control panel, which is inconvenient. In addition, it is difficult to secure a working space when removing the fan from the opening of the side panel.

[0006] The present disclosure has been made in consideration of the above, and aims to obtain a motor control device that allows a maintenance worker to easily perform fan maintenance without stopping the control panel system, even when the motor control device is stored in a control panel. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the object, the motor control device according to the present disclosure is housed in a control panel having an opening and closing door on the front side and an opening on the rear side. The motor control device includes a housing forming an outer shell, a fan housed in the housing for cooling a semiconductor module, a fan support member that supports the fan inside the housing; The housing has a rear opening formed at a position corresponding to the opening formed on the rear side of the control panel. The fan support member has a first detachable member attached to the fan, a second detachable member removably attached to the first detachable member, and a third detachable member that is detachably attached to the second detachable member and also detachably attached to a support member provided inside the housing. The fan is housed at least partially in the control panel. The second detachable member is attached to the third detachable member. In this state, By removing the first detachable member from the second detachable member, It can be removed through the rear opening. Effect of the Invention

[0008] According to the motor control device disclosed herein, even when the motor control device is stored in a control panel, it is possible for a maintenance worker to easily perform maintenance on the fan without stopping the system of the control panel. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a control panel in which a motor control device according to an embodiment is housed; [Diagram 2] FIG. 2 is a rear view showing a control panel in which the motor control device according to the embodiment is housed; [Diagram 3] FIG. 1 is a perspective view showing an example of a housing of a motor control device according to an embodiment; [Figure 4] FIG. 1 is a perspective view showing an example of a semiconductor module, a heat sink, and a fan mounted in a motor control device according to an embodiment; [Diagram 5] FIG. 1 is a cross-sectional view showing a schematic diagram of a control panel in which a motor control device according to an embodiment is housed; [Figure 6] FIG. 2 is an explanatory diagram showing a direction of air flow in the motor control device according to the embodiment; [Figure 7] FIG. 1 is a perspective view showing a state in which a fan support member is attached to a fan included in a motor control device according to an embodiment; [Figure 8] FIG. 1 is an exploded perspective view of a fan and a fan support member of a motor control device according to an embodiment; [Figure 9] FIG. 2 is a cross-sectional view showing a state in which a fan and a fan support member of the motor control device according to the embodiment are mounted inside a housing, as viewed from the side; [Figure 10] FIG. 1 is an explanatory diagram illustrating a state in which a first detachable member of a fan support member included in a motor control device according to an embodiment is detached from a second detachable member; [Figure 11] FIG. 1 is an explanatory diagram illustrating a state in which a second detachable member of a fan support member included in a motor control device according to an embodiment is detached from a third detachable member; [Figure 12] FIG. 10 is an explanatory diagram illustrating a state in which a third detachable member of the fan support member of the motor control device according to the embodiment is detached from a support member provided inside the housing; [Figure 13] FIG. 1 is an explanatory diagram showing a state in which a fan included in a motor control device according to an embodiment is removed from the rear side of a housing, as viewed from the rear side of the housing; [Figure 14]FIG. 1 is an explanatory diagram showing a state in which a fan included in a motor control device according to an embodiment is removed from a rear side of a housing, as viewed from a side of the housing; [Figure 15] FIG. 1 is an explanatory diagram showing a modified example of a housing of a motor control device according to an embodiment; [Figure 16] FIG. 1 is an explanatory diagram showing a state in which a fan included in a motor control device according to an embodiment is removed from a front side of a housing; [Figure 17] FIG. 1 is an explanatory diagram showing a state in which a fan included in a motor control device according to an embodiment is removed from a side surface of a housing; [Figure 18] FIG. 1 is an explanatory diagram showing a state in which a fan included in a motor control device according to an embodiment is removed from a bottom surface side of a housing; [Figure 19] FIG. 13 is a cross-sectional view showing a modified example of a control panel in which the motor control device according to the embodiment is housed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a motor control device according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0011] Embodiment Fig. 1 is a perspective view showing a control panel 200 housing a motor control device 100 according to an embodiment. As shown in Fig. 1, the motor control device 100 according to the embodiment controls the driving of a motor (not shown), and is housed inside the control panel 200 together with peripheral devices 300 and wiring 400.

[0012] The control panel 200 is, for example, a box having a rectangular parallelepiped shape. An opening / closing door (not shown) is provided on the front side of the control panel 200. The control panel 200 shown in FIG. 1 is in a state where the opening / closing door is opened and the peripheral devices 300, the wiring 400, and the motor control device 100 stored inside are exposed from the front side. By opening the opening / closing door of the control panel 200, maintenance of the peripheral devices 300, the wiring 400, and the motor control device 100 can be performed. Of the two motor control devices 100 arranged on the left and right, one is an inverter that converts DC power to desired AC power, and the other is a converter that converts AC power to DC power. In this way, the control panel 200 is generally configured to store and use the motor control device 100 together with the peripheral devices 300 and the wiring 400. The control panel 200 is not limited to the configuration shown in the figure, and may be configured to store one motor control device 100 or three or more motor control devices 100. Furthermore, the control panel 200 may house the peripheral devices 300, the wiring 400, and the motor control device 100, as well as other components.

[0013] FIG. 2 is a rear view showing a control panel 200 in which a motor control device 100 according to an embodiment is housed. Note that FIG. 2 omits the inside of the control panel 200 visible through the opening 200a. As shown in FIG. 2, the control panel 200 has an opening 200a formed on the rear side. The opening 200a is provided, for example, to expose a part of the motor control device 100 to the outside of the control panel 200. Note that the opening 200a is not limited to the position, shape, and size shown in the figure. When there are multiple motor control devices 100, an opening 200a may be provided for each motor control device 100.

[0014] Fig. 3 is a perspective view that typically shows an example of a housing 1 of the motor control device 100 according to the embodiment. Fig. 4 is a perspective view that typically shows an example of a semiconductor module 2, a heat sink 3, and a fan 4 that are mounted inside the motor control device 100 according to the embodiment. As shown in Figs. 3 and 4, the motor control device 100 includes a housing 1 that forms an outer shell, a plurality of semiconductor modules 2, a heat sink 3, and a fan 4.

[0015] As shown in FIG. 3, the housing 1 has a substantially rectangular parallelepiped shape. The housing 1 has an internal air section 10 that forms a space on the front side, a cooling section 11 that forms a space on the rear side, and a partition plate 12 that separates the internal air section 10 and the cooling section 11. The front side of the housing 1 is disposed inside the control panel 200, facing an opening and closing door. The internal air section 10 of the housing 1 is equipped with a semiconductor module 2 and a control board (not shown), etc. The cooling section 11 of the housing 1 is equipped with a heat sink 3, a fan 4, etc. The partition plate 12 is formed with a plurality of openings 12a that communicate the internal air section 10 and the cooling section 11. The upper and lower edges of the partition plate 12 are formed to protrude from the internal air section 10 and the cooling section 11.

[0016] FIG. 5 is a cross-sectional view showing a control panel 200 in which the motor control device 100 according to the embodiment is housed. In FIG. 5, components arranged inside the control panel 200 and components arranged inside the motor control device 100 are omitted. Also, the dashed line shown in FIG. 5 indicates the opening 200a of the control panel 200. As described above, the control panel 200 is configured to house the peripheral devices 300, the wiring 400, and the motor control device 100 inside. The motor control device 100 becomes hot when a current flows through the semiconductor module 2 to drive the motor. Therefore, the control panel 200 needs to be designed in consideration of the exhaust heat of the motor control device 100. Therefore, as shown in FIG. 5, the motor control device 100 is configured such that the internal air unit 10 is arranged inside the control panel 200 and the cooling unit 11 is arranged outside through the opening 200a formed on the back side of the control panel 200. That is, the opening 200a formed on the back side of the control panel 200 is formed with a shape and size that allows the cooling unit 11 of the motor control device 100 to pass through. After the cooling unit 11 of the housing 1 is arranged outside the control panel 200 through the opening 200a, the motor control device 100 is fixed to the control panel 200 by fixing the upper and lower ends of the partition plate 12 to the back side of the control panel 200 with connecting members 18 such as screws or bolts. In this way, by arranging the cooling unit 11 of the motor control device 100 outside the control panel 200, most of the exhaust heat of the motor control device 100 can be exhausted outside the control panel 200, and the volume of the control panel 200 can be made compact.

[0017] The semiconductor module 2 is a type of electronic component, and controls the power supplied to the motor.

[0018] The heat sink 3 dissipates heat generated in the semiconductor module 2. As shown in Fig. 4, the heat sink 3 has a flat heat sink base 30 and a plurality of flat fins 31 provided in parallel at intervals on one surface of the heat sink base 30. The heat sink 3 has the heat sink base 30 fixed to the partition plate 12 and the plurality of fins 31 arranged in the cooling section 11.

[0019] The heat sink base 30 is formed of a metal material with relatively high thermal conductivity so that heat generated by the multiple semiconductor modules 2 provided on the other surface can be efficiently transferred to the fins 31. As an example, the heat sink base 30 is formed of a metal material that is resistant to corrosion, such as aluminum or an aluminum alloy.

[0020] The fins 31 are heat dissipation components made of rectangular thin plates. The fins 31 are made of a metal material with relatively high thermal conductivity so as to dissipate heat generated by the semiconductor module 2. As an example, the fins 31 are made of a metal material that is resistant to corrosion, such as aluminum or an aluminum alloy.

[0021] FIG. 6 is an explanatory diagram showing the direction of travel of the air flow A in the motor control device 100 according to the embodiment. The white arrow in FIG. 6 indicates the direction of travel of the air flow A generated by the fan 4. As shown in FIG. 6, the fan 4 generates the air flow A that flows from below to above the cooling unit 11. That is, the direction of travel of the air flow A is from the lower surface side to the upper surface side of the housing 1. The inside of the cooling unit 11 becomes an air passage through which the air flow A generated by the fan 4 flows. By passing the air flow A generated by the fan 4 through a plurality of fins 31, it is possible to suppress a temperature rise of the semiconductor module 2. The fan 4 is mounted on the lower part of the housing 1 in order to make it less susceptible to the influence of the exhaust heat of the motor control device 100.

[0022] FIG. 7 is a perspective view showing a state where a fan support member 5 is attached to the fan 4 of the motor control device 100 according to the embodiment. FIG. 8 is a perspective view showing a state where the fan 4 and the fan support member 5 of the motor control device 100 according to the embodiment are disassembled. FIG. 9 is a cross-sectional view showing a state where the fan 4 and the fan support member 5 of the motor control device 100 according to the embodiment are mounted inside the housing 1, as viewed from the side. The dashed and dotted lines shown in FIG. 9 indicate the opening 200a of the control panel 200 and the opening 12a of the partition plate 12, respectively. As shown in FIGS. 7 to 9, the fan 4 is supported by the fan support member 5, and is mounted on the lower part of the cooling unit 11 while being supported by the fan support member 5.

[0023] As an example, the fan 4 has blades 41 provided inside a rectangular frame 40. The number of fans 4 is not limited to two as shown in the figure, and may be one or three or more. The fan support member 5 includes a first detachable member 50 detachably attached to the fan 4, a second detachable member 51 detachably attached to the first detachable member 50, and a third detachable member 52 detachably attached to the second detachable member 51 and detachably attached to a support member 13 provided inside the housing 1. The third detachable member 52 of the fan support member 5 is disposed in the internal air section 10 of the housing 1, and the first detachable member 50 and the second detachable member 51 are disposed in the cooling section 11 of the housing 1.

[0024] As shown in FIG. 8 and FIG. 9, the first detachable member 50 is formed by bending a metal plate into an L-shape, for example. In the first detachable member 50, one end of the L-shape is a first fixing portion 50a, and the other end of the L-shape is a second fixing portion 50b. The first fixing portion 50a is detachably attached to the frame body 40 of the fan 4 by a first fixing member 53 such as a screw. The second fixing portion 50b is detachably attached to the second detachable member 51 by a second fixing member 54 such as a screw. As shown in FIG. 7 and FIG. 8, the first fixing portion 50a has an opening for passing the air flow A from the fan 4. The first detachable member 50 is attached to each fan 4, for example. Note that the first detachable member 50 is not limited to the configuration shown in the figures, and may be in another form as long as it is detachably attached to the frame body 40 of the fan 4 and to the second detachable member 51. For example, the first detachable member 50 is not limited to being attached to each fan 4, but may be attached to a plurality of fans 4 collectively.

[0025] As shown in FIG. 8 and FIG. 9, the second detachable member 51 is formed by bending a metal plate into a concave shape, for example. The second detachable member 51 has a bottom surface portion 51a, a first side surface portion 51b arranged on the front side of the housing 1, a second side surface portion 51c arranged on the rear side of the housing 1, and a pair of third side surface portions 51d connecting the first side surface portion 51b and the second side surface portion 51c. The second detachable member 51 has a fan 4 to which the first detachable member 50 is attached arranged in a concave interior surrounded by the bottom surface portion 51a, the first side surface portion 51b, the second side surface portion 51c, and the pair of third side surface portions 51d. As shown in FIG. 8, an opening is formed in the bottom surface portion 51a to pass the air flow A from the fan 4. As shown in FIG. 9, the first side surface portion 51b is detachably attached to the third detachable member 52 by a third fixing member 55 such as a screw. The second side surface portion 51c is attached to the second fixing portion 50b of the first detachable member 50 by a second fixing member 54 such as a screw.

[0026] 10 is an explanatory diagram that illustrates a state in which the first detachable member 50 of the fan support member 5 of the motor control device 100 according to the embodiment is detached from the second detachable member 51. The first detachable member 50 is detached from the second detachable member 51 by removing the second fixing member 54. The fan 4 can be removed together with the first detachable member 50 by removing the first detachable member 50 from the second detachable member 51. Note that the second detachable member 51 is not limited to the configuration illustrated in the figure, and may have another configuration as long as the fan 4 to which the first detachable member 50 is attached can be disposed and the second detachable member 51 is detachably attached to the first detachable member 50.

[0027] As shown in FIG. 8 and FIG. 9, the third detachable member 52 is formed by bending a metal plate into an L-shape, for example. The third detachable member 52 has one end of the L-shape as a fixed surface portion 52a, and the other end of the L-shape as a protruding piece 52b protruding from the upper end edge of the fixed surface portion 52a toward the front side. The fixed surface portion 52a faces the first side surface portion 51b of the second detachable member 51, and is detachably attached to the first side surface portion 51b by a third fixing member 55 such as a screw, and is detachably attached to the support member 13 provided inside the housing 1 by a fourth fixing member 56 such as a screw. The protruding piece 52b functions as a handle when the fan support member 5 is removed from inside the housing 1. As shown in FIG. 9, the support member 13 is fixed to the front side of the partition plate 12 by a connecting member 13a such as a screw or a bolt, for example. As a result, the fan support member 5 has the third detachable member 52 disposed in the internal air section 10, and the first detachable member 50 and the second detachable member 51 disposed in the cooling section 11 through the opening 12a of the partition plate 12. Note that the support member 13 is not limited to being fixed to the partition plate 12, and may be fixed to other components.

[0028] 11 is an explanatory diagram that illustrates a state in which the second detachable member 51 of the fan support member 5 of the motor control device 100 according to the embodiment is detached from the third detachable member 52. The second detachable member 51 is detached from the third detachable member 52 by removing the third fixing member 55. By removing the second detachable member 51 from the third detachable member 52, the fan 4 can be removed together with the first detachable member 50 and the second detachable member 51.

[0029] 12 is an explanatory diagram illustrating a state in which the third detachable member 52 of the fan support member 5 of the motor control device 100 according to the embodiment is removed from the support member 13 provided inside the housing 1. The third detachable member 52 is removed from the support member 13 provided inside the housing 1 by removing the fourth fixed member 56. The fan 4 becomes removable together with the fan support member 5 by removing the third detachable member 52 from the support member 13. Note that the third detachable member 52 is not limited to the configuration shown in the figure, and may be in another form as long as it is configured to be detachably attached to the second detachable member 51 and to be detachably attached to the support member 13 provided inside the housing 1.

[0030] Incidentally, the fan 4 is a part with a limited life span and is therefore periodically replaced by a maintenance worker. However, in the past, in a motor control device housed in a control panel, it was sometimes impossible to remove the fan from inside the housing without opening the door of the control panel. In order to open the door of the control panel, the power supply may need to be cut off and the system temporarily stopped. Therefore, every time maintenance of the fan is performed, it is necessary to check the operating status of the system in the control panel, which is inconvenient.

[0031] Therefore, in the motor control device 100 according to the embodiment, the fan 4 mounted on the lower part of the motor control device 100 is configured to be removable from the rear side of the housing 1 for maintenance. FIG. 13 is an explanatory diagram showing the state where the fan 4 of the motor control device 100 according to the embodiment is removed from the rear side of the housing 1 from the rear side of the housing 1, as viewed from the rear side of the housing 1. FIG. 14 is an explanatory diagram showing the state where the fan 4 of the motor control device 100 according to the embodiment is removed from the rear side of the housing 1, as viewed from the side of the housing 1. As shown in FIGS. 13 and 14, in the motor control device 100 according to the embodiment, a rear opening 11a is formed on the rear side of the housing 1. As an example, the rear opening 11a is formed to have a size that allows the fan 4 to be removed from the outside of the housing 1. The rear opening 11a is closed by a rear cover 14 formed of sheet metal. The rear cover 14 is fixed to the rear side of the housing 1 by a fixing member 14a such as a screw.

[0032] As shown in FIGS. 13 and 14, when removing the fan 4 mounted inside the housing 1 from the rear side of the housing 1, first, a maintenance worker removes the fixing member 14a and removes the rear cover 14 from the housing 1. This opens the rear opening 11a, and the maintenance worker can access the inside of the housing 1 from the rear side of the housing 1. Next, as shown in FIG. 10, the maintenance worker removes the second fixing member 54, removes the first detachable member 50 from the second detachable member 51, and pulls out the fan 4 together with the first detachable member 50 toward the rear side of the housing 1. This allows the maintenance worker to remove the fan 4 and perform maintenance on the fan 4.

[0033] When mounting the fan 4 inside the housing 1 from the rear side of the housing 1, the maintenance worker places the fan 4 with the first detachable member 50 attached inside the recess of the second detachable member 51, and attaches the first detachable member 50 to the second detachable member 51 with the second fixing member 54, as shown in Fig. 9. Then, the rear opening 11a of the housing 1 is closed with the rear cover 14, and the rear cover 14 is attached to the rear of the housing 1 with the fixing member 14a.

[0034] FIG. 15 is an explanatory diagram showing a modified example of the housing 1 of the motor control device 100 according to the embodiment. The rear opening 11a of the housing 1 shown in FIG. 15 is formed to a size that allows the fan 4 to be removed from the outside of the housing 1 and allows maintenance of other components arranged inside the housing 1. The rear cover 14 is formed to match the size of the rear opening 11a. One example of the other components arranged inside the housing 1 is a heat sink 3. This makes it possible to prevent malfunctions in the operation of the motor control device 100 by maintaining the components inside the housing 1, for example by cleaning clogging of the fins 31 of the heat sink 3.

[0035] As described above, the motor control device 100 according to the embodiment includes the housing 1 forming an outer shell, and the fan 4 housed in the housing 1 to cool the semiconductor module 2. The housing 1 has a rear opening 11a formed at a position corresponding to an opening formed on the rear side of the control panel 200. The fan 4 is removable through the rear opening 11a when at least a part of the housing 1 is housed in the control panel 200. Therefore, in the motor control device 100 according to the embodiment, the fan 4 can be removed through the rear opening 11a of the housing 1 without opening the door provided on the front side of the control panel 200. Therefore, even when the motor control device 100 is housed in the control panel 200, a maintenance worker can easily perform maintenance on the fan 4 without stopping the system of the control panel 200.

[0036] The housing 1 also has an internal air section 10 disposed inside the control panel 200, and a cooling section 11 disposed outside the control panel 200 through an opening formed on the rear side of the control panel 200. A semiconductor module 2 is mounted in the internal air section 10. A heat sink 3 and a fan 4 are mounted in the cooling section 11. Thus, the motor control device 100 according to the embodiment can dissipate most of the exhaust heat of the motor control device 100 outside the control panel 200, and can make the volume of the control panel 200 compact.

[0037] The motor control device 100 according to the embodiment also includes a fan support member 5 that supports the fan 4 inside the housing 1. The fan support member 5 includes a first detachable member 50 attached to the fan 4, a second detachable member 51 detachably attached to the first detachable member 50, and a third detachable member 52 detachably attached to the second detachable member 51 and detachably attached to a support member 13 provided inside the housing 1. The fan 4 can be removed together with the first detachable member 50 through the rear opening 11a by removing the first detachable member 50 from the second detachable member 51. Therefore, the motor control device 100 according to the embodiment can remove the fan 4 from the rear side of the housing 1 with a simple operation of simply removing the first detachable member 50 from the second detachable member 51, thereby reducing the workload of the maintenance worker.

[0038] In the motor control device 100 according to the embodiment, the fan 4 mounted on the lower part of the housing 1 can be removed from the front side, side side or bottom side of the housing 1 for maintenance.

[0039] Fig. 16 is an explanatory diagram showing a state in which the fan 4 of the motor control device 100 according to the embodiment is removed from the front side of the housing 1. As shown in Fig. 16, a front opening 10a is formed in the front of the housing 1 at a position opposite the fan 4 mounted inside the housing 1. The front opening 10a is closed by a front cover 15 formed of sheet metal. The front cover 15 is fixed to the front of the housing 1 with a fixing member such as a screw (not shown).

[0040] 17 is an explanatory diagram showing a state in which the fan 4 of the motor control device 100 according to the embodiment is removed from the side surface of the housing 1. As shown in FIG. 17, a side surface of the housing 1 that connects the front side and the back side of the housing 1 and extends along the air flow A of the fan 4 has a side opening 11b formed at a position facing the fan 4. The side opening 11b is closed by a side cover 16 formed of sheet metal. The side cover 16 is fixed to the side surface of the housing 1 by a fixing member such as a screw (not shown). The side opening 11b may be formed only on one side surface of the housing 1, or may be formed on both the left and right side surfaces.

[0041] FIG. 18 is an explanatory diagram showing a state in which the fan 4 of the motor control device 100 according to the embodiment is removed from the bottom side of the housing 1. As shown in FIG. 18, a bottom opening 11c is formed on the bottom of the housing 1 at a position facing the fan 4. The bottom opening 11c functions as an inlet for the air flow A generated by the fan 4. A cutout portion 17 for holding the fan support member 5 is formed on the opening edge forming the bottom opening 11c. Meanwhile, the second detachable member 51 is provided with a hook portion 57 that is hooked on the cutout portion 17. That is, when the first detachable member 50 and the second detachable member 51 are attached, the hook portion 57 is hooked on the cutout portion 17, so that the fan 4 is held so as not to fall out of the bottom opening 11c. Note that, as a means for holding the fan support member 5, for example, the second detachable member 51 may be fixed to the internal structure of the housing 1 by a fixing means such as a screw.

[0042] First, a case where the fan 4 mounted on the lower part of the housing 1 is removed from the front side of the housing 1 to perform maintenance will be described. When removing the fan 4 mounted inside the housing 1 from the front side of the housing 1, first, a maintenance worker shuts off the power supply to the control panel 200 to stop the system. Then, as shown in FIG. 1, the door of the control panel 200 is opened to make the inside of the control panel 200 accessible from the front side of the control panel 200. At this time, the maintenance worker accesses the inside of the control panel 200 from the front side of the control panel 200 and removes the wiring 400 from the motor control device 100. Next, as shown in FIG. 16, the maintenance worker removes the front cover 15 from the housing 1. This opens the front opening 10a, making it possible to access the inside of the housing 1 from the front side of the housing 1. 12, the maintenance worker removes the fourth fixing member 56 to remove the third detachable member 52 from the support member 13, and also removes the hook portion 57 of the second detachable member 51 from the cutout portion 17, and pulls out the fan 4 together with the fan support member 5 from inside the housing 1 toward the front side. This allows the maintenance worker to remove the fan 4 and perform maintenance on the fan 4. Note that since the door of the control panel 200 is open, the fan 4 can be taken out of the housing 1 and therefore taken out of the control panel 200.

[0043] In this way, the motor control device 100 of the embodiment enables the fan 4 to be removed from the front side of the housing 1 by the simple task of simply removing the third detachable member 52 from the support member 13, thereby reducing the workload of the maintenance worker.

[0044] When mounting the fan 4 inside the housing 1 from the front side of the housing 1, first, the maintenance worker places the fan 4 with the fan support member 5 attached at an installation location inside the housing 1, and hooks the hook portion 57 of the second detachable member 51 into the notch portion 17. Next, as shown in FIG. 9, the maintenance worker attaches the fixing surface portion 52a of the third detachable member 52 to the support member 13 with the fourth fixing member 56. Next, the front opening 10a of the housing 1 is closed with the front cover 15, and the front cover 15 is attached to the front of the housing 1 with a fixing member not shown. Finally, the door of the control panel 200 is closed, and the power supply of the control panel 200 is energized to operate the system.

[0045] Next, a case where the fan 4 mounted on the lower part of the housing 1 is removed from the side of the housing 1 to perform maintenance will be described. When removing the fan 4 mounted inside the housing 1 from the side of the housing 1, first, the maintenance worker shuts off the power supply to the control panel 200 to stop the system. Then, as shown in FIG. 1, the door of the control panel 200 is opened to make the inside of the control panel 200 accessible from the front side. At this time, the maintenance worker accesses the inside of the control panel 200 from the front side of the control panel 200 and removes the wiring 400 from the motor control device 100. Next, the maintenance worker removes the front cover 15 from the housing 1. This opens the front opening 10a, making it possible to access the inside of the housing 1 from the front side of the housing 1. Next, as shown in FIG. 11, the maintenance worker removes the third fixing member 55 and removes the second detachable member 51 from the third detachable member 52. 17, the maintenance worker goes around to the rear side of the control panel 200 and removes the side cover 16 from the housing 1. This opens the side opening 11b, making it possible to access the inside of the housing 1 from the side of the housing 1. Next, the maintenance worker removes the hook portion 57 of the second detachable member 51 from the cutout portion 17, and pulls out the fan 4 together with the first detachable member 50 and the second detachable member 51 from the side opening 11b of the housing 1 toward the side. This allows the maintenance worker to remove the fan 4 and perform maintenance on the fan 4.

[0046] In this way, the motor control device 100 of the embodiment enables the fan 4 to be removed from the side of the housing 1 by the simple task of simply detaching the second detachable member 51 from the third detachable member 52, thereby reducing the workload of the maintenance worker.

[0047] When mounting the fan 4 inside the housing 1 from the side of the housing 1, first, the maintenance worker places the fan 4 to which the first detachable member 50 and the second detachable member 51 are attached from the side opening 11b to an installation location inside the housing 1, and hooks the hook portion 57 of the second detachable member 51 to the notch portion 17. Next, the maintenance worker closes the side opening 11b of the housing 1 with the side cover 16, and attaches the side cover 16 to the side of the housing 1 with a fixing member not shown. Next, the maintenance worker goes around to the front side of the control panel 200, and attaches the second detachable member 51 to the third detachable member 52 with the third fixing member 55, as shown in FIG. 9. Next, the front opening 10a of the housing 1 is closed with the front cover 15, and the front cover 15 is attached to the front of the housing 1 with a fixing member not shown. Finally, the door of the control panel 200 is closed, and the power supply of the control panel 200 is energized to operate the system.

[0048] Next, a case where the fan 4 mounted on the lower part of the housing 1 is removed from the lower surface side of the housing 1 to perform maintenance will be described. When removing the fan 4 mounted inside the housing 1 from the lower surface side of the housing 1, first, the maintenance worker shuts off the power supply to the control panel 200 to stop the system. Then, as shown in FIG. 1, the door of the control panel 200 is opened to make the inside of the control panel 200 accessible from the front side. At this time, the maintenance worker accesses the inside of the control panel 200 from the front side of the control panel 200 and removes the wiring 400 from the motor control device 100. Next, the maintenance worker removes the front cover 15 from the housing 1. This opens the front opening 10a, making it possible to access the inside of the housing 1 from the front side of the housing 1. Next, as shown in FIG. 11, the maintenance worker removes the third fixing member 55 and removes the second detachable member 51 from the third detachable member 52. 18, the maintenance worker goes around to the rear side of the control panel 200, removes the hook portion 57 of the second detachable member 51 from the cutout portion 17 through the bottom opening 11c of the housing 1, and pulls out the fan 4 together with the first detachable member 50 and the second detachable member 51 downward from the bottom opening 11c of the housing 1. This enables the maintenance worker to remove the fan 4 and perform maintenance on the fan 4.

[0049] In this way, the motor control device 100 of the embodiment enables the fan 4 to be removed from the underside of the housing 1 by the simple task of simply detaching the second detachable member 51 from the third detachable member 52, thereby reducing the workload of the maintenance worker.

[0050] When mounting the fan 4 inside the housing 1 from the underside of the housing 1, the maintenance worker first places the fan 4 to which the first detachable member 50 and the second detachable member 51 are attached in an installation location inside the housing 1 from the underside opening 11c, and hooks the hook portion 57 of the second detachable member 51 into the notch portion 17. Next, the maintenance worker goes around to the front side of the control panel 200, and attaches the second detachable member 51 to the third detachable member 52 with the third fixing member 55, as shown in FIG. 9. Next, the front opening 10a of the housing 1 is closed with the front cover 15, and the front cover 15 is attached to the front of the housing 1 with a fixing member not shown. Finally, the door of the control panel 200 is closed, and the power supply of the control panel 200 is energized to operate the system.

[0051] Fig. 19 is a cross-sectional view showing a schematic diagram of a modified example of the control panel 200 in which the motor control device 100 according to the embodiment is housed. Note that Fig. 19 omits components arranged inside the control panel 200 and components arranged inside the motor control device 100. The motor control device 100 according to the embodiment has been described as having a configuration in which the internal air section 10 of the housing 1 is arranged inside the control panel 200 and the cooling section 11 of the housing 1 is arranged outside through the opening 200a formed on the back side of the control panel 200, but is not limited to this configuration.

[0052] As shown in FIG. 19, the motor control device 100 according to the embodiment may have a configuration in which the cooling unit 11 is disposed together with the internal air unit 10 of the housing 1 inside the control panel 200. The motor control device 100 is disposed inside the control panel 200 such that the rear opening 11a of the housing 1 overlaps with the opening 200a of the control panel 200. The rear surface of the housing 1 is fixed to the rear surface of the control panel 200 with a connecting member 19 such as a screw or a bolt. The rear surface of the housing 1 is formed to a size that protrudes from the upper and lower surfaces of the housing 1, for example, and the upper and lower parts of the protruding rear surface are fixed to the rear surface of the control panel 200 with the connecting member 19. A maintenance worker accesses the inside of the control panel 200 from the opening 200a formed on the rear surface of the control panel 200, and performs maintenance of the fan 4 from the rear opening 11a of the motor control device 100. Since the fan 4 is mounted inside the cooling unit 11 arranged inside the control panel 200, it can be taken out of the control panel 200 by taking it out of the housing 1. The opening formed on the back surface of the control panel 200 may be closed with, for example, a plate-shaped cover. The means for fixing the motor control device 100 to the control panel 200 is not limited to the form shown in FIG. 19, and other means may be used as long as a maintenance worker can access the inside of the control panel 200 from the opening 200a formed on the back surface of the control panel 200 and perform maintenance on the fan 4 from the back surface opening 11a of the motor control device 100.

[0053] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention. [Explanation of symbols]

[0054] 1 housing, 2 semiconductor module, 3 heat sink, 4 fan, 5 fan support member, 10 internal air section, 10a front opening, 11 cooling section, 11a rear opening, 11b side opening, 11c bottom opening, 12 partition plate, 12a, 200a opening, 13 support member, 13a, 18, 19 connection member, 14 rear cover, 14a fixing member, 15 front cover, 16 side cover, 17 notch portion, 30 heat sink base, 31 fin, 40 frame, 41 blade, 50 first detachable member, 50a first fixing portion, 50b second fixing portion, 51 second detachable member, 51a bottom portion, 51b first side portion, 51c second side portion, 51d third side portion, 52 third detachable member, 52a fixing surface portion, 52b Protrusion piece, 53 first fixing member, 54 second fixing member, 55 third fixing member, 56 fourth fixing member, 57 hook portion, 100 motor control device, 200 control panel, 300 peripheral equipment, 400 wiring.

Claims

1. A motor control device housed in a control panel having an opening / closing door on the front side and an opening formed on the rear side, The outer casing and The aforementioned enclosure houses a fan for cooling the semiconductor module, The enclosure includes a fan support member that supports the fan inside the enclosure, The housing has a rear opening formed at a position corresponding to the opening formed on the rear side of the control panel. The aforementioned fan support member is The first detachable member attached to the aforementioned fan, A second detachable member is detachably attached to the first detachable member, It has a third detachable member which is detachably attached to the second detachable member and which is detachably attached to a support member provided inside the housing, The fan is designed so that at least a portion of the housing is housed in the control panel, and the second detachable member is attached to the third detachable member, and the first detachable member is removed from the second detachable member, thereby allowing the fan to be removed together with the first detachable member through the rear opening. A motor control device characterized by the following features.

2. The housing has an internal air section located inside the control panel and a cooling section located outside the control panel through an opening formed on the rear side of the control panel. The semiconductor module is mounted in the aforementioned internal chamber. The cooling unit is equipped with the fan. The motor control device according to claim 1.

3. A side opening is formed on the side of the housing that connects the front and rear sides of the housing and extends along the airflow of the fan, at a position facing the fan. The fan is removable through the side opening. The motor control device according to claim 2.

4. A bottom opening is formed on the lower surface of the housing at a position opposite to the fan. The fan is removable through the bottom opening. The motor control device according to claim 2 or 3, characterized in that it is a motor control device.

5. The front of the housing has a front opening formed at a position opposite to the fan. The fan is removable through the front opening. A motor control device according to any one of claims 1 to 3.

6. The front of the housing has a front opening formed at a position opposite to the fan, The fan is removable through the front opening. The motor control device according to feature 4.

7. The fan is removable together with the first and second removable members through the side opening by removing the second removable member from the third removable member. The motor control device according to claim 3.

8. The fan is removable together with the first and second removable members through the bottom opening by removing the second removable member from the third removable member. The motor control device according to feature 4.

9. The fan is removable together with the fan support member through the front opening by removing the third detachable member from the support member. The motor control device according to claim 5.

Images