JP3204916B2 - Inverter integrated motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter-integrated motor in which an inverter device is provided integrally with a motor body.

[0002]

FIG. 19 shows a conventional configuration of this type of inverter-integrated motor. The inverter-integrated motor 1 includes a motor main body 2 and an inverter device 3 provided integrally in the axial direction. The inverter device 3 houses a wiring board 5 on which a control circuit (not shown) is mounted, a main circuit board 7 on which a smoothing capacitor 6 is mounted, and a power module 8 containing a plurality of switching elements and diodes in a case 4. It is configured. On the left side of the case 4 in FIG. 19, a plurality of radiating fins 9 for projecting the heat generated by the power module 8 and the like to the outside are projected to the left.

However, in the above-described conventional configuration, since the inverter device 3 is disposed on one end surface of the motor body 2 in the axial direction, the case 4 of the inverter device 3 is not provided.
However, the area of the side surface that comes into contact with one end surface of the motor main body 2 is reduced, and the dimension in the axial direction is increased in order to secure the volume. At the same time, in order to release the heat generated by the power module 8 and the like, a considerably large radiating fin 9 is provided on the left side of the case 4 so that the axial length of the inverter device 3 becomes longer. As a result, there is a problem that the axial length of the entire inverter-integrated motor 1 is considerably long.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inverter-integrated type in which the axial length can be reduced and the inverter device can be cooled well. It is to provide a motor.

[0005]

According to the present invention, there is provided an inverter-integrated motor in which an inverter device is provided integrally with a motor main body, wherein a motor mounting base for mounting the motor main body on an upper surface thereof is provided. The present invention is characterized in that the inverter device is housed inside the motor mount (claim 1).

According to the inverter-integrated motor having the above structure, the inverter device is housed inside the motor mount for mounting and fixing the motor body, so that the overall axial length can be reduced. it can. Further, the heat generated by the inverter device is radiated from the entire motor mounting base having a relatively large shape, so that the cooling can be performed well without the need for the conventional radiating fins.

[0007] The inverter-integrated motor may be provided with an upright portion which is provided upright at one axial end of the motor mount and abuts against one end surface of the motor body. (Claim 2).

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. Inverter integrated motor 1
1 is a motor main body 12, a motor mount 13 on which the motor main body 12 is placed and mounted, and a motor mount 13
And an inverter device 14 housed in the inside. The motor mounting base 13 is made of, for example, an aluminum material, and the lower surface portion 13b is formed to have a larger area than the upper surface portion 13a for mounting and fixing the motor main body 12. Further, a storage chamber for storing the inverter device 14 is formed inside the motor mount 13. An opening is formed in the upper part of the storage room, and the inverter device 14 can be stored in the storage room through the opening.

The inverter device 14 includes a wiring board 15 on which a control circuit 16 and a smoothing capacitor 17 are mounted, and a power module 1 provided below the wiring board 15.
And 8. In the power module 18, a plurality of diodes for rectifying AC and a plurality of switching elements for generating AC from DC are provided. These diodes and switching elements are components that generate heat as the motor operates.

The inverter-integrated motor 11 constructed as described above is mounted and fixed on a base 19, which is an installation site. In this case, the lower surface portion 13b of the motor mount 13 is brought into contact with the upper surface of the base 19, and the projecting leg portions 13c projecting from the lower sides of the motor mount 13 are provided on the base 19. Screwed on.

A rail receiving portion is formed at the opening edge of the storage chamber on the upper surface portion 13a of the motor mounting base 13. At the same time, on both lower side portions of the motor body 12, a rail portion which is slidably fitted with the rail receiving portion is formed. Thereby, the motor main body 12 is slid from the direction of the arrow A in FIG. 1 and the rail portion is slidably fitted to the rail receiving portion of the motor mounting base 13 so that the motor main body 12 is placed on the motor mounting base 13. ing. The motor body 12 and the motor mount 13 are fixed by screws or the like.

In the above configuration, when the inverter device 14 is driven to drive the inverter-integrated motor 11, the plurality of switching elements and diodes of the inverter device 14 generate heat. The generated heat is radiated through the entire motor mount 13 and
The heat is transmitted to the base 19 through the lower surface 13b and is radiated. Thereby, the inverter device 14 is cooled well.

According to the first embodiment having such a configuration, since the inverter device 14 is housed inside the motor mount 13, the heat generated in the inverter device 14 is radiated through the entire motor mount 13 and , Its lower surface 13
b, the heat is transmitted to the base 19 and is radiated. This makes it possible to reduce the size of the inverter device 14 without the need for a conventional radiating fin, and to cool the inverter device 14 satisfactorily.

Further, since an opening is formed in the upper part of the storage chamber in the motor mounting base 13, the inverter device 14 can be easily stored in the storage room of the motor mounting base 13. In this case, workability can be improved as compared with a configuration in which the components of the inverter device 14 are sequentially mounted on the motor main body 12 and then the motor main body 12 is mounted on the motor mount 13.

Further, since a rail receiving portion is formed on the motor mounting base 13 side and a rail portion which is slidably fitted on the rail receiving portion is formed on the motor main body 12 side, the motor main body 12 is moved in the direction of arrow A in FIG. By sliding from the opening, the opening of the motor mount 13 can be closed,
The motor main body 12 can be mounted on the motor mounting base 13, so that workability can be improved in assembling.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different portions will be described.

In the inverter-integrated motor 21 shown in the second embodiment, a box-shaped upright portion 22 is integrally provided on one end (left end in FIG. 2) of the motor mount 13 in the axial direction. ing. The right side surface portion of the upright portion 22 in FIG. 2 is configured to substantially abut on one (left side in FIG. 2) end surface portion 12a of the motor body 12. A storage room is formed inside the upright portion 22, and the right side surface of the storage room is open. In the case of this configuration, the inverter device 14
It is stored separately in the storage room of the motor mount 13 and the storage room of the standing portion 22. Specifically, the power module 18 of the inverter device 14 is disposed in a storage room of the motor mount 13, and has a control board 25 on which the wiring board 23 on which the smoothing capacitor 17 is mounted and the control circuit 25 (see FIG. 4) are mounted. The circuit board 24 is provided in the storage room of the upright portion 22.

On the end face 12a of the motor body 12, a rotation speed sensor 26 for detecting the rotation speed of the motor, a temperature sensor 27 for detecting the temperature of the motor, a vibration sensor 28 for detecting the vibration of the motor, a motor winding And a leakage current sensor 30 for detecting a leakage current of the motor . Their to each sensor 26 to 30 is connected to the conductor pattern of the control circuit board 24 via the respective wires 26A～30a. Accordingly, the detection signal is adapted to be supplied to the control circuit 25 to be output from the respective sensors 26 to 30.

As shown in FIG. 3, a control panel 3 is provided on the rear surface 21a of the inverter-integrated motor 21.
1 is attached. The control panel 31 includes an operation start / stop switch 32, a power (POWER) indicator lamp 33, an operation (RUN) indicator lamp 34, and an emergency (EM)
G) An indicator lamp 35 and a frequency setting volume 36 are provided. In this case, the user sets the operating frequency of the motor to, for example,
It can be adjusted to z. Further, the control panel 31 is opened and closed by a hinge portion 37, and in the open state, the smoothing capacitor 17 and the wiring board 23 are exposed.

Further, on the rear surface 21a of the inverter-integrated motor 21, outside the control panel 31, a connection terminal 38 to which an external device is connected and a radio signal (for example, infrared light) output from the external device are received. A receiving sensor 39 is provided. That is, the user
By connecting an external device to the inverter-integrated motor 21 via a connection terminal 38 or by giving a wireless signal from the external device to the inverter-integrated motor 21 via a reception sensor 39, the operating conditions of the inverter-integrated motor 21 are controlled. And so on can be set from outside.

FIG. 4 shows an electric block configuration of the inverter-integrated motor 21 described above. Control circuit 25
Is mainly composed of a microcomputer. The control circuit 25 normally operates based on the operating conditions set by the user.
A control signal is output to 0 to control the operation of the motor.

Further, as described above, the control circuit 25
By being connected to each of the sensors 26 to 30, it is determined whether the operation of the motor is normal or abnormal based on the detection signal given from each of the sensors 26 to 30, and appropriate processing is performed accordingly. Is configured to do so. Specifically, when a detection signal is given from each of the sensors 26 to 30, the control circuit 25 determines whether the operation of the motor is normal or abnormal based on the detection signal, and determines that the motor is abnormal. At this time, a control signal is output to the inverter circuit 40 so that the operation of the motor becomes normal, and the motor is controlled.

Next, the processing of the control circuit 25 will be described with reference to FIGS. As an example, a process of reading the temperature of the motor during operation by the temperature sensor 27 and determining whether to continue or stop the operation based on the read temperature will be described with reference to a flowchart shown in FIG.

First, the control circuit 25 reads the motor temperature detected by the temperature sensor 27 at a predetermined sampling cycle (in this case, a cycle longer than a set time T1s described later) as the actually measured temperature TH (step A1). A preset temperature THs is read (step A
2). Then, the control circuit 25 compares the read actual measured temperature TH with the set temperature THs (step A).
3) When the measured temperature TH is higher than the set temperature THs, the time T1 during which the measured temperature TH is higher than the set temperature THs is integrated (step A4). Then
The control circuit 25 has a preset time T1s
Is read (step A5).

Subsequently, the control circuit 25 compares the time T1 integrated in step A4 with the set time T1s (step A6). If the time T1 is longer than the set time T1s, the operation of the motor is abnormal. And the operation is stopped (step A7).

On the other hand, the measured temperature TH is equal to the set temperature T.
When Hs is smaller than Hs, or even when the measured temperature TH becomes higher than the set temperature THs, when the time T1 is smaller than the set time T1s, it is determined that the motor is operating normally and the operation is continued. (Return to step A1). In this way, the control circuit 25 determines whether to continue or stop the operation of the motor based on the temperature read by the temperature sensor 27.

As another example, a vibration value read by the vibration sensor 28 is compared with a vibration value calculated by the rotation speed read by the rotation speed sensor 26, and the operation is performed based on the comparison result. The process of determining whether to continue or stop will be described with reference to the flowchart shown in FIG.

The control circuit 25 reads the vibration value of the motor detected by the vibration sensor 28 at a predetermined sampling period (in this case, a period longer than a set time T2s described later) as an actually measured vibration value V (step B1). Next, the control circuit 2
5 reads the rotational speed of the motor detected by the rotational speed sensor 26 as the actually measured rotational speed R (step B2) and, based on the measured rotational speed R, sets the allowable vibration value of the motor corresponding to the rotational speed R to the set vibration value. It is calculated as Vs (step B3).

The control circuit 25 compares the measured vibration value V with the set vibration value Vs (step B4). If the measured vibration value V is larger than the set vibration value Vs, the control circuit 25 compares the measured vibration value V with the set vibration value Vs. Time T2 that is greater than Vs
Are integrated (step B5). Next, the control circuit 25
Reads a preset time T2s (step B6).

Then, the control circuit 25 compares the time T2 integrated in step B5 with the set time T2s (step B7). If the time T2 is longer than the set time T2s, it is determined that the operation of the motor is abnormal. The operation is stopped upon determination (step B8).

On the other hand, when the actually measured vibration value V is smaller than the set vibration value Vs, or even when the measured vibration value V becomes larger than the set vibration value Vs, the time T2 is shorter than the set time T2s. At this time, it is determined that the operation of the motor is in a normal state, and the operation is continued (return to step B1). In this way, the control circuit 25 determines whether to continue or stop the operation of the motor based on the vibration value read by the vibration sensor 28 and the rotation speed read by the rotation speed sensor 26.

According to the second embodiment having such a configuration, the inverter device 14 can be cooled well as in the first embodiment. In addition, since the upright portion 22 is provided on the motor mount 13, the axial length of the inverter-integrated motor 21 is slightly longer.
4 are stored separately in the storage room of the motor mounting base 13 and the storage room of the standing portion 22, so that the dimension of the motor mounting base 13 in the height direction can be reduced accordingly. Become.

Since the control panel 31 is provided on the rear surface 21a of the inverter-integrated motor 21, the operability can be improved when various settings (power on / off and adjustment of the operating frequency) are performed. When the control panel 31 is opened, the smoothing capacitor 17 and the wiring board 23 are exposed, so that the maintenance performance can be improved, for example, the smoothing capacitor 17 can be easily replaced. .

The inverter-integrated motor 21 is provided with sensors 26 to 30 and a control circuit 25. The sensors 26 to 30 detect the operating state of the motor, and the control circuit 25 operates the motor in accordance with the detection result. It is determined whether to continue or stop. Therefore, an external device such as a personal computer is provided separately from the inverter-integrated motor 21 and the operating state of the motor is detected by the external device to detect the operating state of the motor. As a whole, the size can be reduced and the cost can be reduced as compared with the case of determining whether to continue or stop. Further, in this case, wiring for connecting the inverter-integrated motor 21 and an external device can be eliminated, and adverse effects due to noise can be reduced.

The sensors 26 to 30 are connected to the motor body 1
2, the motor end (a change in temperature, vibration value, etc.) can be properly captured, reliability can be improved, and the sensors 26 to 30 and the motor body 12 Can be eliminated, and adverse effects due to noise can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same parts as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different parts will be described.

In the inverter-integrated motor 41 shown in the third embodiment, the sensors 26 to 30 are mounted on the control circuit board 24, and the end surface 12a of the motor body 12 is mounted.
And it was comprised so that each predetermined | prescribed site | part of a winding may be contacted.

According to the third embodiment, the same functions and effects as those of the second embodiment can be obtained. In particular, in the third embodiment, since the wirings 26a to 30a for connecting the sensors 26 to 30 and the control circuit board 24 are not required, the size and cost can be reduced and the noise can be reduced. Adverse effects due to the above can be reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The inverter-integrated motor 51 is composed of a motor body 52, a case 53 attached to the left end of the motor body 52, and an inverter device housed inside the case 53. The case 53 mainly includes a rectangular tube portion 54 as shown in FIG. 9, and a left end opening of the rectangular tube portion 54 has a cover 53.
a, and the right end opening is closed by the left end surface of the motor main body 52.

The rectangular tube portion 54 is formed by connecting four heat radiating plates 55 to 58 made of, for example, aluminum in a square tube shape as shown in FIG. In this case, the heat sink 55
Each of the connecting end portions 55 to 58 has an end surface 55a to 58a, 55b to 58b formed of an inclined surface having an inclination of approximately 45 °,
Each end face 55b and 56a, 56b and 57a, 57b and 58
a and 58b and 55a, respectively,
For example, it is mechanically joined by screwing.

On the outer surface of each of the heat radiating plates 55 to 58, there are provided a plurality of radiating fins
5c to 58c are protruded, and the height of each protruding piece is substantially the same. Further, a radiation fin 59 formed of a protruding piece extending in the left-right direction is also provided on the outer surface of the motor body 52. Then, the radiation fins 59 of the motor main body 52 and the radiation fins 55c to 58c of the respective radiation plates 55 to 58 are formed.
Are arranged on the same straight line (see FIG. 8).

On the inner surfaces of the heat radiating plates 57, 56 and 58 located on the upper and both sides in the rectangular tube portion 54, switching elements 60a to 60f as heat generating components in the inverter device are provided in the package. Contained 2
A diode stack 61 as a heat-generating component in which a plurality of diodes are built is housed in a package and arranged on a heat sink 55 located at a lower portion. And these switching elements 60a to 60f
And the diode stack 61 are electrically connected by wire wiring (not shown).

Although not shown, other components (for example, a smoothing capacitor) constituting the inverter device are attached to the cover 53a, for example, so as to be located in the gaps between the switching elements 60a to 60f and the diode stack 61. Is provided via a spacer for use.

According to the above configuration, when the inverter device is driven to drive the inverter-integrated motor 51, the switching elements 60a to 60f and the diode stack 61 generate heat. In this case, the switching elements 60a to 60f and the diode stack 61
Are distributed as described above, and the generated heat is dissipated by the radiation fins 55 of the respective radiation plates 55 to 58.
C to 58c are dispersed and discharged, whereby the inverter device is cooled well.

According to the fourth embodiment having such a structure, the switching elements 60a to 60a which generate heat in accordance with the operation of the motor are provided.
60f and the heat sinks 55-5
8, the heat generated in the inverter device can be dispersed and released from the radiating fins 55c to 58c of the radiating plates 55 to 58. And the inverter device can be satisfactorily cooled. Further, in the case of the fourth embodiment, since the heat radiating plates 55 to 58 are plate members having the same shape, there is an advantage that there is an effect of mass production.

In the fourth embodiment described above, the rectangular tube 5
4 is composed of four heat radiating plates 55 to 58, but is not limited thereto. That is, as in the fifth embodiment shown in FIG. 10, the rectangular tube portion 62 may be configured to connect the six heat radiating plates 63 to 68 so that the cross section becomes a hexagonal cylindrical shape. In the case of this configuration, it is preferable that the switching elements 60a to 60f and the diode stack 61 are dispersedly arranged on the inner surfaces of the heat radiation plates 63 to 68.

Further, as in the sixth and seventh embodiments shown in FIGS. 11 and 12, the rectangular tube portions 69 and 70 are formed by connecting eight heat radiation plates 71 to 78 so that the cross section becomes an octagonal cylindrical shape. May be connected. In the case of this configuration, it is preferable that the switching elements 60a to 60f and the diode stack 61 are dispersedly arranged on the inner surface of each of the heat radiating plates 71 to 78. In FIGS.
The arrangement patterns of Oa to 60f and the diode stack 61 are changed.

In the above-described fourth embodiment, the height of each protruding piece of each of the heat radiation fins 55c to 58c is the same, so that the cross-sectional shape of the rectangular tube portion 54 is entirely rectangular. However, it is not limited to this.
That is, as in the eighth embodiment shown in FIG. 13, the tip of each protruding piece of each of the radiating fins 83a to 86a of each of the heat radiating plates 83 to 86 in each of the rectangular tube portions 79 is formed by changing its tip shape and position. May draw a locus having an arcuate cross section. In such a case, the cross sectional shape of each square tube portion 79 is substantially circular.

Further, the same applies to FIGS. 10 to 12 described above, as in the corresponding ninth to eleventh embodiments shown in FIGS. Of the radiating fins 87a-92a, 93a-100a of the radiating plates 87-92, 93-100, respectively, so that the tip shape and position of the fins draw a locus of an arc-shaped cross-section, and May be substantially circular.

Next, a twelfth embodiment of the present invention will be described with reference to FIGS. The same parts as in the fourth embodiment are denoted by the same reference numerals, and description thereof will be omitted.
The different parts will be described.

In the inverter-integrated motor 101 shown in the twelfth embodiment, the leg portions 104 are formed at both ends of the heat sink 103 located at the lowermost position in the rectangular tube portion 102. According to this configuration, the inverter-integrated motor 101
When mounting on a base as an installation site, the leg 1
04 can be placed and fixed on the base by screwing it. In this case, the heat sink 1
03 is the other heat sink 5 because the leg 104 is formed.
It is formed wider than 6-58.

According to the twelfth embodiment, the same function and effect as those of the fourth embodiment can be obtained. In particular, in the twelfth embodiment, since the shape of the lowermost radiator plate 103 is larger than those of the other radiator plates 56 to 58, components having the largest heat generation are arranged on the lower radiator plate 103. With this configuration, there is an advantage that the heat dissipation can be improved.

The present invention is not limited to the above embodiment, but can be modified or expanded as follows. In the fourth embodiment, the heat radiating plates 55 to 58 may be joined by engagement, bonding with an adhesive, or fixing with a molding material without being limited to screwing.

The switching elements 60a to 60f and the diode stack 61 are not limited to wire wiring, and an insulating layer and a conductor pattern may be formed on the heat radiating plates 55 to 58, and they may be electrically connected by the conductor pattern.

[0060]

As is apparent from the above description, according to the inverter-integrated motor according to the first aspect, the inverter device is housed inside the motor mount for mounting and fixing the motor body. Therefore, the overall length in the axial direction can be reduced, and the heat generated by the inverter device is radiated from the entire motor mounting base having a relatively large shape. Good cooling can be achieved while eliminating the need for fins.

According to the inverter-integrated motor of the second aspect, the same effect as that of the first aspect can be obtained, and the height dimension of the motor mount can be reduced. Become.

[0062]

[0063]

[0064]

[0065]

[0066]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a view showing a second embodiment of the present invention corresponding to FIG. 1;

FIG. 3 is a perspective view seen from a rear side.

FIG. 4 is an electrical block diagram.

FIG. 5 is a flowchart illustrating processing of a control circuit (part 1);

FIG. 6 is a flowchart illustrating processing of a control circuit (part 2);

FIG. 7 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 8 is a side view showing a fourth embodiment of the present invention.

FIG. 9 is a sectional view of a case.

FIG. 10 is a view corresponding to FIG. 9 showing a fifth embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 9, showing a sixth embodiment of the present invention;

FIG. 12 is a view corresponding to FIG. 9 showing a seventh embodiment of the present invention.

FIG. 13 is a view corresponding to FIG. 9 showing an eighth embodiment of the present invention.

FIG. 14 is a view corresponding to FIG. 9 showing a ninth embodiment of the present invention.

FIG. 15 is a view corresponding to FIG. 9 showing a tenth embodiment of the present invention.

FIG. 16 is a view corresponding to FIG. 9 showing an eleventh embodiment of the present invention.

FIG. 17 is a view corresponding to FIG. 8, showing a twelfth embodiment of the present invention;

FIG. 18 is a diagram corresponding to FIG. 9;

FIG. 19 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

In the drawing, 11 is an inverter-integrated motor, 12 is a motor body, 12a is an end face, 13 is a motor mount, 13a is a top face, 13c is one end, 14 is an inverter device, 21
Is an inverter-integrated motor, 22 is a standing part, 41 , 51
Is an inverter-integrated motor, 52 is a motor body , 101
Is an inverter-integrated motor.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Bunsaku Takeuchi 2121 Asahi-cho, Mie-gun, Mie Prefecture, 2121 Nagoya, Toshiba Mie Plant (72) Inventor Satoshi Ashi 2121, Nagoya, Asahi-machi, Mie-gun, Mie Prefecture (56) References JP-A-3-222649 (JP, A) JP-A-7-115778 (JP, A) JP-A-59-165941 (JP, A) JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02K 5/22 H02K 11/00

Claims (2)

(57) [Claims] 1. An inverter-integrated motor in which an inverter device is provided integrally with a motor main body, comprising: a motor mounting base for mounting the motor main body on an upper surface thereof, wherein the inverter device is mounted inside the motor mounting base. Inverter-integrated motor characterized by being housed in a housing. 2. The inverter-integrated type according to claim 1, further comprising an upright portion provided upright at one axial end of the motor mount and abutting against one end surface of the motor body. motor.