JP3248253B2 - Inverter device - 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 device comprising a converter section and an inverter section, and more particularly, to a large-sized inverter apparatus (inverter panel) which is realized in the form of a unit housed in a panel. It is related to the structural improvement of.

[0002]

2. Description of the Related Art FIG .
No. 4) Conventional inverter device (inverter panel)
(A) is a side view, and (b) is a front view (a view of (a) viewed from the right side).

In these figures, reference numeral 104 denotes a transistor unit (a three-phase bridge circuit having a transistor configuration, that is, a unit comprising an upper arm and a lower arm constituting one phase of an inverter unit), and 105 denotes a converter unit. 106, an inverter device (inverter panel), 107, an induction fan mounted on the ceiling, 108, a unit fan mounted for each unit, 109, a DC intermediate (+) short-circuit bar, and 110, a DC intermediate (-). Short-circuit bar, 111 is an output bar, 112 is a unit handle provided in each unit, 113 is a rack as a frame, and + is a screw tightening point.

The transistor unit 104 is composed of a box formed of a thin sheet metal and a unit fan 108 together with a one-phase transistor and a smoothing capacitor of the inverter unit.
When 08 operates, a flow of wind occurs as shown by an arrow, and the transistor, the smoothing capacitor, and the like are cooled (heat dissipation).

[0005] The transistor unit 104 comprises U1, V
1, W1, U2, V2, and W2, there are a total of six, and D, which is a diode unit 105, is added to the unit, and seven units are stacked in the rack 113 and pulled out in a stepwise manner as viewed from the front and forward. It is arranged freely. The output bar 111 is where the user (customer) connects a terminal to take out the output from the inverter device 106.

FIG . 9 is a circuit diagram showing a circuit configuration of a conventional inverter device (inverter panel) according to the above-mentioned proposal. In the figure, 101 is a transistor element, 102
Is a smoothing capacitor, 103 is a diode element, 104 is a transistor unit, 105 is a diode unit,
Reference numeral 106 denotes an inverter device (inverter panel).

Each transistor unit 104 includes a transistor for each phase and a smoothing capacitor of a three-phase bridge circuit constituting an inverter unit, and U1, V1, W
1, U2, V2, and W2, and the number of diode units 105 constituting the converter unit is one D.

[0008] Referring back to FIG. 8, DC shown in FIG. 8 intermediate (+)
The short-circuit bar 109 is a bar that connects between the collectors of the transistors in the upper arm of the inverter unit in FIG. 9 to short-circuit, and the DC intermediate (-) short-circuit bar 110 is between the emitter of each transistor in the lower arm of the inverter unit. Is a bar that connects to short-circuit. Output bar 11
Reference numeral 1 denotes a bar connecting and short-circuiting the emitter of the upper-arm transistor and the collector of the lower-arm transistor.

FIG . 10 is a plan view of the transistor unit 104, and FIG. 11 is a side view of the same. In these figures, 101 is a transistor element, 102 is a smoothing capacitor, 108 is a unit fan, 110 is a DC intermediate (-) short-circuit bar, 111 is an output bar, 112 is a handle, 1
15 is a front plate, 116 is a radiation fin, 117 is a collector short-circuit bar, 118 is an emitter short-circuit bar, 119 is a collector-emitter short-circuit bar, 133 is a sheet metal frame (middle plate), 134 is a bent sheet metal (seat), and 135 is A windhole.

Referring to FIG . 10 and FIG . This configuration is 6
The parallel transistor elements 101 form one block in three parallels to form two blocks, a gap SL is formed between the two blocks, and an air hole 135 is opened in a part of the sheet metal frame (middle plate) 133. is there. As a result, the wind from the unit fan 108 causes the smoothing capacitors 102 and 1
After passing through the space 02, the air flows through the air holes 135 and the gap SL, and the cooling efficiency of the transistor unit 104 can be increased.

[0011]

The conventional inverter device according to the present invention as described above has the advantage of being small in size and occupying a small installation space despite its large capacity . As can be seen from the above, since the component arrangement in the transistor unit 104 is arranged in series with the fan 108, the smoothing capacitor 102, and the radiation fin 116,
A certain absolute dimension is required as the depth dimension of the inverter device.

Further, as shown in FIG. 8 , since the cooling air from a total of seven units including the diode unit 105 is discharged to the upper part on the rear side of the apparatus, a duct space for that is necessary. Therefore, there has been a problem that the depth dimension of the apparatus is increased, and the apparatus does not meet the needs of a market that prefers a thin panel.

There is also a problem that the apparatus itself does not meet the market needs of a finished product as a single unit. In the event of an accident, a spare unit is provided to reduce the downtime of the system. However, as an emergency measure, if one inverter is equipped as a complete unit as described above, and if it is portable, it will become a spare unit. There was a problem that it did not meet the market needs of connecting, temporarily starting up the system, investigating, repairing, and switching. These are caused by the fact that the apparatus is large and large, and is therefore heavy.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to save space, which is an advantage of the prior art.
An object of the present invention is to provide an inverter device capable of maintaining easy maintenance and low cost.

[0015]

In order to achieve the above object, according to the present invention, in an inverter device including a converter section and an inverter section, one phase of a three-phase bridge circuit having a semiconductor element configuration as an inverter section is formed. Each unit is composed of an upper arm and a lower arm, and a three-phase output block having a three-unit configuration is provided for the entire inverter unit, and a converter unit corresponding to the inverter unit is provided as a single unit block, for a total of four units. in the inverter apparatus configured at least comprise one of the device block structure formed by stacking vertically, arranged in a vertical direction the
A plurality of shelves for storing one unit freely,
All the shelves run vertically along the sides and are flush with the opening of the shelves.
A box having a space having an opening on the same surface, and the converter unit is provided on each of the shelves of the box;
Each inverter unit for one phase without a capacitor
And smoothing capacitors for three phases of the inverter section.
The sensors were collectively arranged in the space.

Further, according to the present invention, in the inverter device, the semiconductor elements belonging to the two-phase output blocks among the three-phase output blocks constituting the inverter section are mounted on the front and back of the same heat radiation cooling body. A second heat radiation block is constructed by attaching a semiconductor element belonging to an output block for the remaining one phase and the one block constituting the converter section to the front and back of another heat radiation cooling body. Blocks are stacked up and down to form one device, and the direction of the cooling air is blown vertically from the lower block to the upper block.

Further, according to the present invention, in the inverter device, the block constituting the lowermost portion of the block configuration is keyed.
Was installed.

[0018]

The above structure, that is, the inverter unit and the condenser
Sensor units in the vertical direction
Block configuration reduces the depth dimension of the device.
Required and the exhaust is up to 4 units.
Duct space can be reduced. To get large capacity
Is a row board in which a plurality of boards (inverter devices) are arranged.

[0019] In the inverter device, arranged vertically.
A plurality of shelves having a plurality of shelves, wherein each of the shelves of the
And the above four units can be pulled out one unit at a time
And each inverter unit for one phase
Does not have the required smoothing capacitor,
Empty through all the shelves of the box in a vertical direction.
Reduce the depth of the device by placing it between
Yakuritsu one to.

Further, the first heat radiating block is constituted by attaching the semiconductor elements belonging to the output block for the two phases to the front and back of the same heat radiating and cooling unit, and the output block and the converter constituting the converter section for the remaining one phase are attached. The second heat dissipation block is formed by attaching the semiconductor element belonging to the block to the front and back of another heat dissipation cooling body, and the heat dissipation block is stacked up and down to constitute one device, thereby eliminating the need for duct space. And downsizing (small depth dimension) can be achieved.

The maintenance is performed by pulling out all the blocks from the board. Block that constitutes the bottom of all block configuration
It is easy to carry the device out of the board by attaching the casters to the panel.

[0022]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external view when an inverter device as one embodiment of the present invention is installed, (a) is a side view, (b) is a front view ((a) is a right side view of (a)). ). (B) is a front view of the case where two rows are arranged.

In these figures, 6 is an inverter board (row board) equipped with two three-phase outputs , 7 is an inverter board equipped with one three-phase output, 8 is a two-phase output transistor unit, and 9 is a one-phase output transistor. Phase input diode unit, 12
Is a unit fan, 15 is an output bar, 16 is an input bar,
17 is a radiation fin, 22 is a caster.

FIG. 2 is a circuit diagram showing a circuit configuration of an inverter apparatus which is an embodiment shown in FIG. In FIG.
1 is a transistor element, 2 is a smoothing capacitor, 3 is a diode element, 6 is an inverter board (row board) equipped with two three-phase outputs, 7 is an inverter board equipped with one three-phase output, 9 is a one-phase output transistor, three-phase Input diode unit.

FIG. 3 is a block diagram showing a 2-phase output transistor unit 8 in FIG. 1, (a) is a side view of FIG. 3, (b) is a A-A arrow view of a side view (b) is there. FIG.
, 1 is a transistor element, 2 is a smoothing capacitor, 12 is a unit fan, 13 is a DC intermediate (+) short-circuit bar, 14 is a DC intermediate (-) short-circuit bar, 15 is an output bar, 17 is a radiation fin, and 18 is a collector. Short bar, 19
Is an emitter shorting bar, and 20 is a collector-emitter shorting bar.

[0026] FIG. 4 is a constitutional view showing one phase output transistor 3-phase input diode unit 9 in FIG. 1, FIG.
4 (a) is a side view thereof, (b) is a side view of (a) A-
FIG. In FIG. 4 , 1 is a transistor element, 2 is a smoothing capacitor, 3 is a diode element, 12 is a unit fan, 13 is a DC intermediate (+) shorting bar, 14
Is a DC intermediate (-) shorting bar, 16 is an input bar, 17 is a radiating fin, 18 is a collector shorting bar, 19 is an emitter shorting bar, and 20 is a collector-emitter shorting bar.

As described above, in the embodiment shown in FIGS. 1 to 4 , among the three-phase output blocks constituting the inverter section, the semiconductor elements belonging to the two-phase output blocks (two-phase output transistor unit 8) have the same heat radiation. A first radiating block is configured by being attached to the front and back of the cooling body 17 (b in FIG. 3 ), and the semiconductor elements belonging to the output block for the remaining one phase and one block forming the converter section are connected to another radiating cooling body. 7 to form a second heat radiation block (b in FIG. 4 ), and stack both heat radiation blocks up and down to form one device ( FIG. 1 ) . It will be appreciated that there has been disclosed an inverter device 7 or 6 adapted to be vertically blown from the upper block to the upper block.

FIGS. 5A and 5B are external views when an inverter device as another embodiment of the present invention is installed, wherein FIG. 5A is a side view, and FIG. 5B is a front view (FIG. ). (B) is a front view of the case where two rows are arranged.

In these figures, 1 is a transistor element, 2 is a smoothing capacitor, 3 is a diode element, 4 is 1
Phase output transistor unit, 5 is a 3-phase input diode unit, 6 is an inverter board (row board) equipped with two 3-phase outputs, 7 is an inverter board equipped with one 3-phase output, 10 is a smoothing capacitor unit, and 11 is an induction fan , 12 is a unit fan, 15 is an output bar, 16 is an input bar, 17 is a radiation fin, 21 is a rack, 22 is a caster, 23 is a rack unit, and 24 is a handle.

FIG. 6 is a circuit diagram showing a circuit configuration of an inverter apparatus which is an embodiment shown in FIG. In FIG.
1 is a transistor element, 2 is a smoothing capacitor, 3 is a diode element, 5 is a three-phase input diode unit, 6 is 3
Inverter board (row board) with 2 phase outputs, 7 has 3 phase output 1
Inverter panel equipped with 10, smoothing capacitor unit,
It is.

FIG . 7 is a structural view showing the one-phase output transistor unit 4 in FIG. 5. FIG. 7 (A) is a side view thereof, and FIG. 7 (B) is a side view of FIG. is there. FIG.
, 1 is a transistor element, 2 is a smoothing capacitor, 4 is a one-phase output transistor unit, 10 is a smoothing capacitor unit, 12 is a unit fan, 13 is a DC intermediate (+) short-circuit bar, and 14 is a DC intermediate (-) short-circuit bar. ,
15 is an output bar, 17 is a radiation fin, 18 is a collector short-circuit bar, 19 is an emitter short-circuit bar, 20 is a collector-emitter short-circuit bar, 23 is a rack unit, 24 is a handle,
It is.

As described above, the embodiment shown in FIGS. 5 to 7 has a box body (rack unit 23) having a plurality of shelves (rack 21) arranged in the vertical direction. In each of the shelves (rack 21), the one-phase output transistor unit 4 is housed one unit at a time so as to be able to be pulled out, and each inverter unit for one phase is not equipped with a required smoothing capacitor. 2 collectively as a smoothing capacitor unit 10,
Inverter device 7 in which all shelves are arranged in a space that communicates vertically
Or 6 has been disclosed.

[0033]

As described above, according to the present invention,
A large-capacity inverter device with a reduced depth dimension can be provided while maintaining space saving, easy maintenance, and low cost, and can be provided in units of three-phase output, and is portable. There is an advantage that the unit can be easily taken in and out of the board.

[Brief description of the drawings]

FIG. 1 is an external view when an inverter device according to an embodiment of the present invention is installed.

FIG. 2 is a circuit diagram showing a circuit configuration of the embodiment shown in FIG.

FIG. 3 is a configuration diagram illustrating a two-phase output transistor unit in FIG. 1;

FIG. 4 is a configuration diagram showing a one-phase output transistor / three-phase input diode unit in FIG. 1;

FIG. 5 is an external view when an inverter device according to another embodiment of the present invention is installed.

6 is a circuit diagram showing a circuit configuration of the embodiment shown in FIG.

FIG. 7 is a configuration diagram showing a one-phase output transistor unit in FIG. 5;

FIG. 8 is an external view when a conventional inverter device (inverter panel) according to the already proposed (Japanese Patent Application No. 3-260534) is installed.

FIG. 9 is a circuit diagram showing a circuit configuration of the conventional inverter device shown in FIG.

FIG. 10 is a plan view of the transistor unit in FIG. 8;

FIG. 11 is a side view of the transistor unit in FIG.

[Description of Signs] 1 ... transistor element, 2 ... smoothing capacitor, 3 ... diode element, 4 ... one-phase output transistor unit, 5 ...
3-phase input diode unit, 6 ... Inverter board (row board) equipped with two 3-phase outputs, 7 ... Inverter board equipped with one 3-phase output, 8 ... 2-phase output transistor unit, 9 ... 1-phase output transistor, 3-phase input Diode unit, 10: smoothing capacitor unit, 11: induction fan, 12: unit fan, 13: DC intermediate (+) shorting bar, 14 ...
DC intermediate (-) shorting bar, 15 ... output bar, 16 ... input bar, 17 radiation fins, 18 ... collector shorting bar, 19
... Emitter short-circuit bar, 20 ... Collector-emitter short-circuit bar, 21 ... Rack, 22 ... Caster, 23 ... Rack unit, 24 ... Handle

Continuation of the front page (56) References JP-A-1-186175 (JP, A) JP-A-63-283470 (JP, A) JP-A-63-3645 (JP, A) JP-A-3-277182 (JP, A) , A) (58) Field surveyed (Int.Cl. ⁷ , DB name) H02M 7/48

Claims (3)

(57) [Claims] 1. A device comprising a converter section and an inverter section,
Each of the upper arm and the lower arm constituting one phase of the three-phase bridge circuit having a semiconductor element configuration, which is the inverter unit, has one unit.
A three-phase output block having a three-unit configuration is constituted by a unit, and a converter unit corresponding to the inverter unit is provided as a single unit block. A total of four units are vertically stacked. In an inverter device including at least one device, the one unit is arranged vertically and the one unit can be pulled out.
Multiple shelves and all shelves running vertically along the sides of the shelves.
And a space having an opening on the same surface as the opening surface of the shelf.
Having a box provided with the converter
Unit and one phase without required smoothing capacitor
And each inverter unit
An inverter device, wherein smoothing capacitors for three phases of the unit are collectively arranged in the space. 2. An inverter device comprising a converter unit and an inverter unit, wherein each unit of an upper arm and a lower arm constituting one phase of a three-phase bridge circuit of a semiconductor element configuration as an inverter unit is constituted, 3 units of 3 units in the whole inverter unit
A phase output block, and a converter unit corresponding to the inverter unit is provided as one unit block, and two of the three-phase output blocks constituting the inverter unit are provided.
Semiconductors belonging to the output block for one phase are attached to the front and back of the same heat radiation cooling body to constitute a first heat radiation block, and the semiconductor belonging to the output block for the remaining one phase and the one block constituting the converter section A second heat radiating block is configured by attaching the element to the front and back of another heat radiating cooling body, and one device is configured including at least a block configuration in which both heat radiating blocks are vertically stacked,
An inverter device wherein the direction of cooling air is blown vertically from the lower block to the upper block. 3. The inverter device according to claim 1, wherein a caster is attached to a block constituting a lowermost portion of the block configuration.