JPH0456540B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rotating electrical machine with a cooling fan that generates noise in a housing, and a cooling device for the rotating electrical machine in which a control device for the rotating electrical machine is housed. be.

[Background of the invention]

In conventional devices, there are few that integrate a rotating electrical machine and a control device for the rotating electrical machine, and they are often installed separately. FIG. 1 shows an example of a device that integrates a conventional rotating electrical machine and a control device for the rotating electrical machine. In Fig. 1, 1 is a housing, 2 is a rotating electric machine,
3 is a control device. In FIG. 1, the front doors 7 and 8 of the housing 1 are shown in an open state. Cooling air is sucked in by the cooling fan 11 of the rotating electrical machine 2 from the intake port a of the housing, advances as shown by the arrow, and reaches the exhaust port b of the housing.
The rotating electric machine 2 is cooled down. Such devices have the following problems.

(1) The noise from the rotating electric machine, which is the source of the noise, is particularly large in the direction of the cooling air intake and outlet. Since it is close to the cooling air intake and outlet, we can only expect a noise reduction of a few dB.

(2) Since the ventilation direction of the rotating electric machine and the outside are the same, the temperature becomes higher toward the exit side, that is, the temperature distribution gradient becomes larger.

(3) If you try to increase the distance between the housing and the rotating electric machine, the housing will become larger.

(4) The temperature of the control device located above the rotating electrical machine increases due to the heat generated by the rotating electrical machine, so its lifespan is significantly shortened and it also has the disadvantage of causing malfunctions.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device for a rotating electric machine that is small and compact, has good cooling performance, has low noise, and integrates a rotating electric machine and a control device.

[Summary of the invention]

A cooling device for a rotating electrical machine according to the present invention includes a rotating electrical machine configured to have a cooling fan, a ventilation inlet, and a ventilation outlet in a housing so that cooling air flows through the interior, and a rotating electrical machine located above the rotating electrical machine. In the housing, the housing includes a first air intake and a second exhaust port above the first air intake, and inside the housing, the housing includes: a first exhaust that partitions the rotating electrical machine and the control device, partitions the first air intake port and the ventilation intake port, is provided to surround the rotating electrical machine, and communicates with the ventilation outlet; a partition wall having an outlet, an intake port provided on a ventilation exit side of the rotating electrical machine, and a first exhaust port that communicates the control device side with the rotating electrical machine side, and a first exhaust port provided on the ventilation exit side of the rotating electrical machine; The partition wall includes a first ventilation path extending from the first air intake port to the air intake port between the partition wall and the inner surface of the housing, and a first ventilation path extending along the outer surface of the rotating electrical machine between the partition wall and the outer surface of the rotating electrical machine. A second ventilation path from the air intake port to the ventilation intake port, a third ventilation path from the first exhaust port to the second exhaust port between the inner surface of the housing and the first airflow path. A fourth ventilation path is formed from the intake port to the first exhaust port passing around the control device, and the second ventilation path is connected to the second ventilation path from the first ventilation path and the fourth ventilation path. When passing the cooling air taken in from the first air intake into the rotating electric machine through the passage, the direction of the airflow flowing through the second ventilation passage and the direction of the airflow flowing inside the rotating electric machine are opposite to each other. It is characterized by the following.

In another preferred embodiment of the device according to the invention, the ventilation passage is equipped with a sound absorbing material.

In still another preferred embodiment of the apparatus according to the present invention, the control device is surrounded by a partition wall, a cooling air intake port is provided in the partition wall, and the cooling fan of the rotating electric machine is located at a portion of the partition wall where cooling air can be sucked. A cooling air outlet is provided.

The most significant feature of the device according to the present invention is that the rotating electric machine that generates noise is double surrounded by a housing and a partition wall, and a sound deadening material is installed on the partition wall to prevent the spread of noise. This is most commonly done by making the ventilation passages long and curved so that the noise collides with the walls of the ventilation passages and disappears. In addition, sound deadening material will be attached to the ventilation duct walls as necessary. Of course, the effect of noise prevention can be achieved by enlarging the casing that houses the rotating electric machine and the control device and taking noise-reducing measures, but the structure of the device of the present invention allows even in a small casing, the inside of the casing can be The space between the surface and the rotating electrical machine can be effectively utilized as a ventilation path and a noise muffling device.

[Embodiments of the invention]

Hereinafter, the apparatus of the present invention will be explained based on examples. The second is a perspective view of an embodiment of the device of the invention, the third
The figure is a vertical sectional view passing through the - line in Figure 2;
FIG. 4 is a horizontal sectional view taken along the - line in FIG. 2.

This device includes a rotating electrical machine 2 having a cooling fan 11 and a control device 3 for the rotating electrical machine 2 housed in a housing 1. A cooling air intake (intake port) a as a first air intake is provided on the left side wall of the housing 1.
A cooling air exhaust port (exhaust port) b serving as a second exhaust port is provided on the right side of the top plate. FIG. 2 shows the front doors 7 and 8 of the housing 1 in an open state, and FIG. 4 shows them in a closed state. The rotating electrical machine 2 is further surrounded by a partition wall that is spaced apart from the wall of the housing 1 .
The partition wall on the side of the intake port a is called a second partition wall 4, the partition wall on the front and rear sides is called a fourth partition wall 5, and the partition wall on the side of the exhaust port b is called a third partition wall 6. A pedestal 10 as a first partition is provided above the rotating electric machine 2, and the pedestal 10 has its left end on the left side wall 1b of the casing 1, its back side on the back wall 1d of the casing 1, and its right end on the partition 6. are connected to each other. An opening serving as an exhaust port m serving as a first exhaust port is provided on the right side of the pedestal 10. A partition wall 4 and a partition wall 5 are provided on the lower surface of the frame 10 so as to form ventilation passages k and l as first ventilation passages between them and the housing 1, respectively. In this embodiment, the front side of the pedestal 10 is bent downward on the same plane as the partition wall 5, and this bent portion falls to the height of the upper end of the air intake port f and is connected to the upper side of the partition wall 5. The control device 3 is placed on the pedestal 10 . Since the noise is less diffused than the lower side of the rotating electric machine 2, no partition wall is provided. The partition wall 6 on the side of the exhaust port b is provided at a predetermined distance from the front wall of the housing 1 (the front door 8 in this embodiment), and is located at a predetermined distance from the rear wall 1 of the housing 1.
d and the top plate 1c (the partition wall at the extending portion is indicated by reference numeral 9), thereby forming ventilation passages g (lower part) and h (upper part) on the right side of the housing 1 that communicate with the exhaust port b. be done. It goes without saying that the front doors 7 and 8 may be an integral wall.

In this embodiment, the control device 3 includes a frame 10 as a first partition, a partition 9 as a fifth partition,
The side plate 1b (second side plate) on the side where the first air intake ports (intake ports) a and c are provided
(in the figure, the left side plate), the back plate 1d of the housing 1, and the ceiling plate 1c of the housing 1. This control device 3
A fourth ventilation path is formed in the space in which the controller 3 is housed, from the first air intake port c, passing around the control device 3 to the exhaust port m. In this embodiment, the first air intake port is divided into portions a and c, which are provided at the top and bottom of the pedestal 10, respectively, but the first air intake port may be formed as one and provided so as to span the top and bottom of the pedestal 10. Also,
The first air intake port may be located at either position a or c. The partition wall 9 is the second side plate 1 of the housing 1
a (right side plate in FIG. 2), extends continuously from the partition wall 6 as the third partition wall, and is connected to the back surface 1d of the casing 1 on the back side, and connected to the back surface 1d of the casing 1 on the top side. It is connected to the ceiling surface 1c.
The front sides of the partition wall 9 and the partition wall 6 are bent toward the side plate 1a so as to be flush with the front surface of the pedestal 10 and the partition wall 5, and the side plate 1a, the partition wall 6, and the partition wall 9 are bent toward the side plate 1a.
A ventilation passage g and a ventilation passage h as a third ventilation passage are respectively formed in a duct shape. The partition wall 4 provided on the side of the ventilation inlet d of the rotating electric machine 2 is provided at a predetermined distance from the side plate 1d of the housing 1, and its back side is connected to the back side 1d of the housing 1. Thereby, a ventilation path k is formed between the side plate 1b and the partition wall 4, through which air sucked from the intake port a flows. Between the partition wall 6 provided on the ventilation outlet 2e side of the rotating electric machine 2 and the partition wall 4, a partition wall 5 having an intake port f near the partition wall 6 is provided. A ventilation path 1 that communicates with the ventilation path k in between and guides the air sucked from the intake port a to the intake port f.
is formed. In the space between the inner surfaces of the partition walls 4 and 5 and the rotating electric machine 2, a second ventilation path is formed from the intake port f to the ventilation intake port d.

An intake port f of the rotating electrical machine room is provided at the right end of the partition wall 5 of the rotating electrical machine 2 on the side facing the ventilation path 1, and the partition wall 6
An exhaust port e of the rotating electrical machine is provided on the side facing the ventilation path g. The rotating electrical machine 2 is arranged with its ventilation outlet 2e in close contact with the exhaust port e, and the ventilation intake d is located at the left end of the rotating electrical machine 2.

An intake port c for the control device room is provided on the side plate 1b of the housing 1, and a ventilation path is formed between the intake port c and an exhaust port m provided in the pedestal 10 that communicates the control device room and the rotating electrical equipment room. be done.

A sound absorbing material such as urethane foam is attached to all or part of the walls facing the ventilation passages k, l, g, h, etc.

This device is constructed as described above, and cooling air is sucked into the housing 1 through the intake port a by the cooling fan 11 of the rotating electric machine 2. The cooling air sucked through the intake port a enters the ventilation path l through the ventilation path k, and enters the rotating electrical equipment room through the rotating electrical equipment room intake port f, as shown by the arrow in the drawing. The cooling air further passes along the outside of the rotating electrical machine 2 to the left, cools the rotating electrical machine from the outside, and then enters the rotating electrical machine through the ventilation intake d of the rotating electrical machine 2, and proceeds as indicated by the broken line arrow i. The rotating electrical machine is cooled, and the ventilation outlet 2e and exhaust port e of the rotating electrical machine are
The air enters the ventilation path g, passes through the ventilation path h, and is discharged to the outside of the housing 1 from the exhaust port b.

On the other hand, an intake port c as a first air intake port is provided in a portion of the side plate 1b of the housing 1 facing the control device room, an exhaust port m is provided near the partition wall 9 of the pedestal 10, and the exhaust port m is Since the cooling fan 11 of the rotating electrical machine 2 is provided at a location where cooling air can be sucked, the air sucked through the intake port c passes through the fourth ventilation path formed in the control device room and cools the control device. It enters the rotating electrical machine room through the exhaust port m, passes through the second ventilation path, is combined with most of the cooling air, passes through the rotating electrical machine 2, and is discharged to the outside of the housing 1. Figure 5 shows rotating electric machine 2.
An example of the internal structure of is shown below. In this example, 12 is a motorized section, 13 is a power generation section, and 14 is an excitation section connected to the power generation section. Cooling air that enters from the intake port d due to the rotation of the cooling fan 11 passes through the inside of the outer frame 15 as shown by arrow i, and is exhausted from the exhaust port e of the partition wall 6 to the ventilation path g via the ventilation outlet 2e.

Further, inside the rotating electrical machine 2, the temperature is higher on the exhaust side than on the intake side, but since the rotating electrical machine room intake port f is provided closer to the exhaust side of the rotating electrical machine 2, the temperature rise in the rotating electrical machine can be made uniform. Furthermore, since cooling air passes between the rotating electric machine and the control device, the heat generated by the rotating electric machine is not easily transmitted to the control device, and the temperature rise in the control device can be reduced.

As described above, in the device of this embodiment, the rotating electric machine that generates noise is double surrounded by a housing and a partition wall, and the ventilation path that transmits most of the generated noise is lengthened and bent to reduce the noise. Since the sound is made to collide with the wall of the ventilation passage and disappear, and if necessary, a sound deadening material is attached to the wall of the ventilation passage, the noise can be significantly reduced. Further, since the configuration of the device of this embodiment can be achieved without increasing the size of the housing, the device can be made small and compact. With the device of the present invention, for a single rotating electric machine
It has become possible to reduce noise by 10 to 20 db.

〔Effect of the invention〕

According to the present invention, the cooling air of the rotating electric machine is ventilated in opposite directions inside and outside, so that the temperature gradient is reduced and the temperature rise is kept low.
This not only helps in downsizing rotating electrical machines, but also reduces the amount of heat transferred to the control device.
The temperature rise of the control device can be suppressed, and reliability can be improved by extending the life of control parts. Furthermore, since cooling air is provided between the rotating electrical machine and the control device, the temperature rise in the control device is smaller, and the life of the control components can be significantly extended.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of a device that integrates a conventional rotating electrical machine and a control device for the rotating electrical machine, FIG. 2 is a perspective view of an embodiment of a cooling device for a rotating electrical machine according to the present invention, and FIG. 2 is a vertical sectional view taken along the - line in FIG. 2, and FIG. 4 is a horizontal sectional view taken through the - line in FIG. FIG. 5 is a front view of the upper half of the rotating electrical machine. 1... Housing, 2... Rotating electric machine, 3... Control device, 4,
5, 6... Partition wall surrounding the rotating electric machine, 9... Other partition wall,
a, c, f, d...cooling air intake (intake port), b,
e, m...Cooling air outlet (exhaust port), g, h, k,
l...Ventilation duct, 11...Cooling fan.

Claims (1)

[Scope of Claims] 1. A rotating electrical machine configured to have a cooling fan, a ventilation inlet, and a ventilation outlet in a housing so that cooling air flows through the interior, and a control device for the rotating electrical machine above the rotating electrical machine. The casing includes a first air intake port and a second exhaust port above the first air intake port, and the rotating electrical machine is disposed inside the casing. and the control device, a partition between the first air intake port and the ventilation intake port, a first exhaust port provided so as to surround the rotating electric machine, and communicating with the ventilation outlet; a partition wall having an intake port provided on a ventilation outlet side of the electric machine, and a first exhaust port provided on a ventilation exit side of the rotating electric machine that communicates the control device side with the rotating electric machine side; a first ventilation path from the first air intake port to the air intake port between the inner surface of the casing, and a first ventilation path from the air intake port along the outer surface of the rotating electrical machine between the outer surface of the rotating electrical machine and the outer surface of the rotating electrical machine. a second ventilation passage leading to the ventilation intake; a third ventilation passage between the inner surface of the casing and the first exhaust opening to the second exhaust opening; and a third ventilation passage leading to the first air intake. and a fourth ventilation path passing around the control device and reaching the first exhaust port, and connecting the second ventilation path from the first ventilation path and the fourth ventilation path. When passing the cooling air taken in from the first air intake port into the rotating electrical machine through the cooling air passage, the direction of the airflow flowing through the second ventilation path and the direction of the airflow flowing inside the rotating electrical machine are set to be opposite directions. A cooling device for a rotating electric machine characterized by the following. 2 The partition wall includes a first partition wall that partitions the rotating electric machine and the control device, and a partition wall that partitions the ventilation intake port and the first partition wall.
a second partition wall separating the air intake port from the air intake port;
a third partition wall that is spaced apart from the partition wall by a predetermined distance and has a first discharge port that communicates with the ventilation outlet and is provided so as to partition a portion on the ventilation exit side; a fourth partition wall provided between the third partition wall and having an intake port near the third partition wall; and a fifth partition wall that is connected to the third partition wall and extends upward beyond the first partition wall. a partition wall, and the first ventilation passage is provided between the second partition wall and the fourth partition wall and the inner surface of the housing,
The second ventilation passage is provided between the first and fourth partition walls and the rotating electric machine, and the third ventilation passage is provided between the inner surface of the housing and the third partition wall and the fifth partition wall. Claim 1, wherein the fourth ventilation passage is provided between the upper surface of the first partition wall, the fifth partition wall, and the inner surface of the casing. Cooling device for rotating electric machines.