JP2016072468A - Motor control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor control unit, which is simple and inexpensive, capable of effectively utilizing a space of the inside and the outside of a control board to which the motor control unit is attached.SOLUTION: A motor control unit 1 includes: a base plate part 2; a left side plate part 3 and a right side plate part 4 which are connected substantially vertically to a surface of the base plate part 2 on left and right sides of the base plate part 2; a top plate part 5 which is connected substantially vertically to the surface of the base plate part 2 on an upper side of the base plate part 2; and a bottom plate part 6 which is connected substantially vertically to the surface of the base plate part 2 on a lower side of the base plate part 2. A housing in a rectangular parallelepiped shape is formed from the base plate part 2, the left side plate part 3, the right side plate part 4, the top plate part 5, and the bottom plate part 6. The housing includes an opening part of which one surface is opened. The housing is disposed on the control board which is sized so as to include the housing. In the housing, a semiconductor device for supplying power to a control object device and heat radiation parts (a cooling fin 13 and a fan 14) for radiating heat generated by the semiconductor device are disposed. The heat radiation parts are disposed at a plate side of the control board while being fitted to the control board.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the structure of a motor control unit.

A motor control unit that controls a motor or the like is composed of a casing including a main circuit board and a control circuit board.
On this main circuit board, large-sized parts with a large calorific value such as semiconductor elements and electrolytic capacitors constituting converters and inverters are mounted.
In addition, circuit components for controlling the inverter such as a CPU and an IC are mounted on the control circuit board.

The housing of the motor control unit is composed of a main circuit board and a sheet metal that supports the control circuit board.
In addition, the motor control unit usually includes a cooling fin and a cooling fan. The cooling fin and the cooling fan cool circuit components such as a semiconductor element constituting a converter mounted on the substrate and a semiconductor element constituting an inverter mounted on the substrate.

Such a motor control unit is attached to a control panel constituting a machine such as a processing apparatus.
The control panel has a rectangular parallelepiped shape.
The motor control unit is attached inside or outside on the back side of the control panel. For example, when the heat generation inside the motor control unit is large, as shown in Patent Document 1, the heat radiation fins of the motor control unit are arranged outside the control panel. Thereby, cooling outside the panel is performed.

In Patent Document 2, an inverter device having a unit structure including a cooling device for heat dissipation is configured by a sheet metal frame, a case, a side plate, and a bottom plate.
Further, Patent Document 3 describes a control panel capable of good natural cooling.

JP-A-5-38144 JP-A-5-260763 JP-A-6-284522

However, in patent document 1, it arrange | positions so that a part of heat plate may go out inside a unit and the remaining part of a heat plate may go outside. Further, in Patent Document 1, the unit case has a flat and substantially rectangular parallelepiped shape.
As a result, the center of gravity is not fixed, and the mounting balance to the control panel is poor.
Moreover, it is extended in the perpendicular direction with respect to the mounting surface of the control panel. For this reason, space is used both inside and outside the control panel, and it is difficult to effectively use the space.
Furthermore, since the heat plate itself is expensive, the cost is increased.

Moreover, in patent document 2, since several sheet metal is used, sheet metal cost becomes high.
Furthermore, in patent document 3, the structure of the control panel for performing natural cooling satisfactorily becomes complicated. In addition, since the motor control device attached to the back of the control panel uses a large space on the back of the control panel, it is difficult to effectively use the space in the control panel.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a simple and low-cost motor control unit that can effectively use the space inside and outside the control panel to which the motor control unit is attached. It is.

  The motor control unit according to the present invention includes a base plate portion, a left side plate portion and a right side plate portion that are connected substantially perpendicularly to the surface of the base plate portion on the left and right sides of the base plate portion, and an upper side of the base plate portion The top plate portion connected substantially perpendicularly to the surface of the base plate portion, and the bottom plate portion connected substantially perpendicularly to the surface of the base plate portion on the lower side of the base plate portion, The plate part, the left side plate part, the right side plate part, the top plate part, and the bottom plate part form a rectangular parallelepiped casing, and the casing has an open part that is open on one side, and the casing can contain the casing. Arranged on the control panel of the size, the housing is equipped with a semiconductor element that supplies power to the controlled device and a heat dissipation part that dissipates the heat generated by the semiconductor element, and the heat dissipation part is attached to the control panel It is arranged on the control panel board side.

  Suitably, in the said structure, it arrange | positions so that the board side of a control panel may cover an open part.

  Preferably, in the above configuration, the base plate portion, the left plate portion, the right plate portion, the top plate portion, and the bottom plate portion are formed from a single plate.

  Preferably, in the above configuration, the air for cooling the heat radiating portion is formed so that the wind flows in the vertical direction in a state where the air is disposed inside the control panel.

  Preferably, in the above-described configuration, the main circuit board is arranged in parallel along the base plate part, and the control circuit board is arranged on the board side of the control board in a state of being attached to the control board. A connecting portion for connecting the two.

  According to the motor control unit of the present invention, it is possible to effectively use the space inside and outside the control panel, and to provide a simple and low-cost motor control unit.

It is a partial perspective view of the motor control unit according to the embodiment of the present invention. It is a perspective view in the state where the case of the motor control unit concerning an embodiment of the present invention was opened. It is a top view of the housing | casing which opened the housing | casing of the motor control unit which concerns on embodiment of this invention. It is a partially transparent perspective view of the control board which attached the motor control unit which concerns on embodiment of this invention. It is an upper surface sectional view of the control panel which attached the motor control unit concerning the embodiment of the present invention.

FIG. 1 is a partially transparent perspective view of a motor control unit 1 according to an embodiment of the present invention.
FIG. 2 is a perspective view of the motor control unit 1 according to the embodiment of the present invention with the housing opened.
In the drawing, the X axis indicates the vertical direction of the motor control unit 1, the Y axis indicates the depth / thickness direction of the motor control unit 1, and the Z axis indicates the width direction of the motor control unit 1.

  The motor control unit 1 includes a base plate 2, a left side plate 3 and a right side plate 4 connected substantially perpendicularly to the surface of the base plate 2 on the left and right sides of the base plate 2, and a base plate On the upper side of the part 2, the top plate part 5 is connected substantially perpendicularly to the surface of the base plate part 2, and on the lower side of the base plate part 2 is connected substantially perpendicularly to the surface of the base plate part 2. It is comprised by the housing | casing formed from the baseplate part 6. FIG. The casing is arranged on a control panel having a size capable of containing the casing.

  The casing has a rectangular parallelepiped shape with one surface opened by the base plate portion 2, the left plate portion 3, the right plate portion 4, the top plate portion 5 and the bottom plate portion 6. That is, the housing has an open portion 16 whose one surface is open. Therefore, it arrange | positions so that the board side of a control panel may cover the open part 16. FIG. The motor control unit 1 is arranged on the one surface side where the housing is opened so as to be in contact with the inner surface of the control panel. In addition, since the board side of the control panel only needs to be arranged so as to cover the one surface side (opening part 16) where the casing is opened, the board side on the outer side of the control board may be arranged so as to cover the opening part 16. Good.

The housing includes a semiconductor element that supplies power to the device to be controlled and a heat radiating section such as a cooling fin 13 and a fan 14 that radiates heat generated by the semiconductor element.
And the housing | casing is equipped with the order of the semiconductor element and the thermal radiation part toward the inner side of the housing | casing from the base plate part 2 (Y-axis direction).
The cooling fin 13 and the fan 14 are fixed to the housing sheet metal.
As the semiconductor (power transistor), for example, a power MOSFET, an insulated gate bipolar transistor (IGBT), or the like is used.

The housing includes a main circuit board 10, a control circuit board 11, and a connection board 12.
The main circuit board 10 is mounted with an electrolytic capacitor, a switching power supply, a semiconductor element constituting a converter or an inverter.
The main circuit board 10 is provided in parallel to the flat base plate portion 2. For example, the main circuit board 10 is fixed to the base plate 2 and fixed to the metal plate of the housing by the stud 15 (鋲).

The flat control circuit board 11 is provided on one side of the housing that is open. For example, the control circuit board 11 is attached by a stud 15 extending from the base plate part 2 in the Y-axis direction (thickness direction).
Here, in FIG. 1, the control circuit board 11 is indicated by a two-dot chain line.
The flat connection board 12 is a board for connecting the main circuit board 10 and the control circuit board 11 and is provided in parallel to the cooling fins 13 provided on the right side of the housing. That is, the motor control unit 1 is arranged on the board side of the control board 100 with the main circuit board 10 arranged in parallel along the base plate part 2 and the control circuit board 11 attached to the control board 100. A connector for connecting the board 10 and the control circuit board 11 and a connection portion which is a connection board 12 are provided. In the embodiment, the portion connecting the main circuit board 10 and the control circuit board 11 is the connection board 12, but may be connected by a connector.
In FIG. 2, the control circuit board 11 is not drawn.

On the main circuit board 10, a connection board 12 for connecting to the control circuit board 11 is mounted through a connector.
A stud 15 is mounted on the main circuit board 10, and a control circuit board 11 is mounted through the stud 15.
By adopting such a structure, the heaviest cooling fin 13 is arranged at a position close to the mounting surface of the motor control unit 1.
As a result, the center of gravity is located close to the mounting surface of the motor control unit 1, so that the vibration resistance characteristics are improved. Further, by making the component mounting surface of the main circuit board 10 and the component mounting surface of the control circuit board 11 face each other, the space can be effectively used and the thickness can be reduced.

The cooling fin 13 is provided at a position where the heat generation is efficiently cooled from a large component having a large heat generation amount, such as a semiconductor element or an electrolytic capacitor constituting a converter or an inverter provided on the main circuit board 10.
The fan 14 takes in air from the outside of the motor control unit 1 and is formed so that wind flows in the vertical direction with respect to the cooling fin 13 that is a heat radiating portion. Thereby, in the state arrange | positioned inside the control panel 100, an air for cooling the cooling fin 13 winds up and down.

The top plate part 5 is provided with a plurality of air holes 5S in order to release heat inside the casing.
A fan air hole 5 </ b> F is provided in an air intake portion of the fan 14.
A top plate portion side mounting portion 5 a is extended to the top plate portion 5. A plurality of screw holes 5H are provided in the top plate portion side attaching portion 5a for attaching to the control panel 100 with screws.

The bottom plate portion 6 includes a plurality of air holes 6S in order to release heat inside the housing.
A bottom plate portion side mounting portion 6 a is extended to the bottom plate portion 6.
The bottom plate portion side attaching portion 6a is provided with a plurality of screw holes 6H for attaching to the control panel 100 with screws. In this way, the amount of sheet metal used is reduced by sharing the sheet metal on the side surface of the control panel 100 as a sheet that closes the opened surface of the motor control unit 1.

FIG. 3 is a plan view of the casing in which the casing of the motor control unit 1 according to the embodiment of the present invention is opened.
The base plate portion 2, the left plate portion 3, the right plate portion 4, the top plate portion 5 and the bottom plate portion 6 are formed from a single plate.
Here, the total area of the left side plate portion 3 and the right side plate portion 4 is smaller than the area of the base plate portion 2.
Further, the width 3 A of the left side plate portion 3 and the width 4 A of the right side plate portion 4 are smaller than the width 2 A of the base plate portion 2.
As described above, since the motor control unit 1 is composed of a casing formed of a single plate, it can be manufactured simply and at low cost.
Further, even if the sheet metal is reduced, with the above-described configuration, it is possible to arrange heavy components such as the cooling fins 13 and the fans 14 so as to contact the side surface of the control panel 100. Thereby, the arrangement of the motor control unit 1 is stabilized, and the vibration resistance is not deteriorated. In addition, by sharing the sheet metal on the side surface of the control panel 100 as a plate that closes the opened surface of the motor control unit 1, noise resistance characteristics do not deteriorate even if there is no one surface of the motor control unit 1.

FIG. 4 is a partially transparent perspective view of the control panel 100 to which the motor control unit 1 according to the embodiment of the present invention is attached.
The opened one surface side of the motor control unit 1 is arranged on the side surface side of the control panel 100 so as to be in contact with the inner surface of the control panel 100. Here, the abutment means that the end portion (side) of the casing is in contact with the inner surface of the control panel even on the open side of the casing, and the end (side) of the casing hits. It shows the state of sticking in the state of being.
As described above, in the case of the motor control unit 1, the total area of the left side plate portion 3 and the right side plate portion 4 is smaller than the area of the base plate portion 2.
Further, the width 3 A of the left side plate portion 3 and the width 4 A of the right side plate portion 4 are smaller than the width 2 A of the base plate portion 2.
For this reason, it can be arranged in a small space inside the control panel 100. Further, since the position of the center of gravity of the motor control unit 1 is located on the side close to the side surface of the control panel 100, the installation balance by installation is good. For this reason, vibration resistance and noise resistance are good.

  In the motor control unit 1 in a state where there is no side sheet metal, there is a concern about a reduction in noise tolerance. However, in the present embodiment, the problem of reduction in noise resistance and the like does not occur by substituting the control panel sheet metal.

FIG. 5 is a top sectional view of the control panel to which the motor control unit 1 according to the embodiment of the present invention is attached.
A U-shaped housing is provided for the sheet metal on the side surface of the control panel 100.
In FIG. 5, the housing includes a base plate portion 2, a left side plate portion 3, and a right side plate portion 4.
A main circuit board 10 and a control circuit board 11 are mounted on the housing through studs 15.
The main circuit board 10 and the control circuit board 11 are electrically connected by a connection board 12.

The semiconductor element 20 that generates a large amount of heat is mounted on a portion of the main circuit board 10 close to the cooling fins 13.
Heat from the semiconductor element 20 is radiated through the cooling fins 13.
Further, since the wind flows in the vertical direction by the fan 14, the heat is radiated more efficiently.
Further, the air that has become warmer due to heat radiation is discharged from the motor control unit 1 through the air hole 5S of the top plate part 5 and the air hole 6S of the bottom plate part 6.

Next, assembly of the motor control unit 1 will be described. Assembling the motor control unit 1 first folds the unfolded sheet metal (the state shown in FIG. 3) into a rectangular parallelepiped shape.
Specifically, the left side plate portion 3 is folded substantially perpendicularly to the surface of the base plate portion 2 on the left side of the base plate portion 2.
Similarly, the right side plate portion 4 is folded substantially perpendicularly to the surface of the base plate portion 2 on the right side of the base plate portion 2.
Next, on the upper side of the base plate portion 2, the top plate portion 5 is folded substantially perpendicularly to the surface of the base plate portion 2.
Further, at the lower side of the base plate portion 2, the bottom plate portion 6 is folded substantially perpendicular to the surface of the base plate portion 2.
Thereby, a rectangular parallelepiped housing is formed. Or you may acquire what was folded by the rectangular parallelepiped shape.

Next, the cooling fins 13 are mounted on the main circuit board 10, and the main circuit board 10 is fixed to the sheet metal of the housing.
Further, the connection board 12 is mounted on the main circuit board 10.
Finally, the control circuit board 11 is mounted.
As described above, the assembly of the motor control unit 1 is very simple.

<Configuration and Effect of Embodiment>
The motor control unit 1 according to the present embodiment includes a base plate 2 and a left plate 3 and a right plate 4 that are connected substantially perpendicularly to the surface of the base plate 2 on the left and right sides of the base plate 2. And the top plate part 5 connected substantially perpendicularly to the surface of the base plate part 2 on the upper side of the base plate part 2, and substantially perpendicular to the surface of the base plate part 2 on the lower side of the base plate part 2. A base plate portion 2, a left side plate portion 3, a right side plate portion 4, a top plate portion 5 and a bottom plate portion 6 to form a rectangular parallelepiped casing. Has an open portion 16 that is open, and the housing is disposed on a control panel that is large enough to contain the housing. The housing includes a semiconductor element 20 that supplies power to the device to be controlled, and a semiconductor element 20. A heat dissipating part (cooling fin 13 and fan 14) that dissipates heat generated by the heat dissipating element is disposed, and the heat dissipating part is attached to the control panel It is arranged on the plate side of the control panel.

  Since it has such a structure, the motor control unit 1 attached to the control panel 100 is small, and the space inside and outside the control panel can be used effectively.

The motor control unit 1 is arranged so that the plate side of the control panel 100 covers the opening 16.
Since the heat dissipating part is arranged on the open side of the housing in this way, the heat dissipating part is arranged so that the heavy heat dissipating part comes into contact with the plate side of the control panel, and there is a sense of stability and resistance. Vibration and noise resistance can be improved.

The base plate portion 2, the left side plate portion 3, the right side plate portion 4, the top plate portion 5 and the bottom plate portion 6 are formed from a single plate.
By having such a configuration, it can be manufactured simply and at low cost.

Further, the air for cooling the heat radiating portion (cooling fins 13 and fan 14) is formed so that the wind flows in the vertical direction in a state where the air is disposed inside the control panel 100.
By having such a configuration, the semiconductor element 20 that generates a large amount of heat in the motor control unit 1 can be efficiently cooled.

  In addition, the motor control unit 1 is arranged on the board side of the control board 100 with the main circuit board 10 arranged in parallel along the base plate part 2 and the control circuit board 11 attached to the control board 100. A connecting portion (connecting substrate 12 or connector) for connecting the substrate 10 and the control circuit substrate 11 is provided.

The present invention is not limited to the above embodiment, and may have various structures and configurations. For example, shapes other than a rectangular parallelepiped may be sufficient.
Moreover, although the position of the fan is arranged on the upper side, it may be on the lower side. Furthermore, although the fan is arranged so that the wind flows in the up-down direction, the fan may be arranged so that the wind flows in the left-right direction.

DESCRIPTION OF SYMBOLS 1 Motor control unit 2 Base plate part 2A Width 3 Left side plate part 3A Width 4 Right side plate part 4A Width 5 Top plate part 5a Top plate part side attachment part 5F Fan air hole 5H Screw hole 5S Air hole 6 Bottom plate part 6a Bottom plate part Side mounting part 6H Screw hole 6S Air hole 10 Main circuit board 11 Control circuit board 12 Connection board 13 Cooling fin 14 Fan 15 Stud 16 Opening part 20 Semiconductor element 100 Control panel

Claims (5)

A base plate portion, a left side plate portion and a right side plate portion connected substantially perpendicularly to a surface of the base plate portion on the left and right sides of the base plate portion, and a base plate on the upper side of the base plate portion. A top plate part connected substantially perpendicular to the surface of the part, and a bottom plate part connected substantially perpendicular to the surface of the base plate part on the lower side of the base plate part,
The base plate portion, the left side plate portion, the right side plate portion, the top plate portion, and the bottom plate portion constitute a rectangular parallelepiped housing.
The housing has an open part with one side open,
The casing is disposed on a control panel having a size capable of containing the casing.
In the case,
A semiconductor element for supplying power to the device to be controlled;
A heat dissipating part for dissipating heat generated by the semiconductor element is disposed,
The heat radiating portion is disposed on the plate side of the control panel in a state of being attached to the control panel. The motor control unit according to claim 1, wherein a plate side of the control panel is disposed so as to cover the open portion. The motor control unit according to claim 1, wherein the base plate portion, the left side plate portion, the right side plate portion, the top plate portion, and the bottom plate portion are formed from a single plate. The motor control unit according to any one of claims 1 to 3, wherein the air for cooling the heat radiating portion is formed such that air flows vertically in a state of being arranged inside the control panel. . A main circuit board is disposed in parallel along the base plate portion,
The control circuit board is disposed on the control panel in a state attached to the control panel,
The motor control unit according to claim 1, further comprising a connection portion that connects the main circuit board and the control circuit board.

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