CN203574551U

CN203574551U - Inverter

Info

Publication number: CN203574551U
Application number: CN201320573477.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: SMA Solar Technology AG
Current assignee: SMA Solar Technology AG
Priority date: 2013-09-16
Filing date: 2013-09-16
Publication date: 2014-04-30
Anticipated expiration: 2023-09-16

Abstract

The utility model discloses an inverter (10) used in a PV device. The inverter comprises a shell (11), the shell (11) includes a first chamber (12) and a second chamber (13). A first cover part (12a) is constructed as the enclosed first chamber (12), a second cover part (13a) is constructed as the enclosed second chamber (13). An invasion protection (IP) level of the first chamber (12) is higher that an IP level of the second chamber (13). Power electric components (14) are disposed in the first chamber (12). The first cover part (12a) and the second cover part (13a) are arranged in such a way that: the first cover part (12a) can be removed only when the second cover part (13a) is removed. A wall part (15) isolates the first chamber (12) and the second chamber (13). An electric interconnection part (16) goes through the wall part (15) between the first chamber (12) and the second chamber (13) and stretches, and an IP level of the electronic interaction part (16) is higher than or equal to the IP level of the first chamber (12).

Description

Inverter

Technical field

The utility model relates to the inverter for renewable energy system, especially for the inverter of photovoltaic (PV) equipment.

Background technology

In order to utilize the regenerative resources such as such as photovoltaic (PV) generator, conventionally use the direct current (DC) that inverter is supplied renewable energy power generation machine to convert the alternating current (AC) that will be transported in power network to.This inverter comprises housing, and housing holds the power electronic device such as such as semiconductor switch, high-voltage capacitor or choking-winding.Must prevent that these power electronic device are subject to the impact of the impact of environment, particularly dust and moisture.In addition, this inverter comprises: multiple electrical interfaces, such as connector, thread terminal etc., its renewable energy power generation machine for described inverter being connected to the power network of AC side and being connected to DC side; And communication interface, it is for being connected to inverter in other device such as such as display or remote control unit etc.

Conventionally electrician is at the scene by inverter setting be installed in PV equipment.For DC cable and AC cable are connected to corresponding DC electrical interface and AC electrical interface in well-known inverter, electrician is opened the housing of inverter, to access corresponding connector or thread terminal.

If inverter is arranged on outdoor, for holding the inverter case of power electronic device, must there is higher IPS (IP) grade, for example IP44 level, IP54 level or IP65 level, to guarantee that power electronic device is not subject to the impact of the impact of environment, particularly dust and moisture.If open the housing of inverter to install, to arrange or to keep in repair, the power electronic device in housing is at least temporarily exposed in environment.In addition, there is following risk: between installation or routine maintenance operational period, the device in inverter or the sealing of inverter case damage owing to being subject to mechanical shock.

Therefore, the demand of existence to following inverter: this inverter comprises housing, housing has high IPS grade to the power electronic device being contained in housing, allows easily and safely to access for the object of installing and keep in repair the electrical interface of inverter simultaneously.

Utility model content

For an inverter for PV equipment, this inverter comprises housing, and housing comprises the first chamber and the second chamber.The first cap is configured to seal the first chamber, and the second cap is configured to seal the second chamber.IPS (IP) grade of the first chamber is higher than the IP grade of the second chamber.The first cap and the second cap are arranged to: before removing the first cap, must remove the second cap.Power electronic device is arranged in the first chamber.Wall portion separates the first chamber and the second chamber.The wall portion of electrical interconnection portion through the first chamber and the second chamber extends, and the IP grade of electrical interconnection portion is greater than or equal to the IP grade of the first chamber.

Therefore, the housing of inverter comprises two chambers that separated by wall portion, can utilize independently cap to seal each chamber, and must remove described cap before opening housing.The power electronic device of inverter is arranged in the first chamber, and separates with the DC joint and the AC joint that are arranged on the inverter in the second chamber.For DC cable or AC cable are connected to DC joint or AC joint, needn't open the cap of the first chamber, the first chamber housing power electronic device.Therefore, between these two chambers, at least one electrical interconnection portion is set, and at least one electrical interconnection cage structure becomes to make to be arranged on DC joint and AC joint and the power electronic device interconnection being arranged in the first chamber in the second chamber.In order to ensure the first chamber that comprises power electronic device, have suitable IPS (IP) grade, the IP grade of described electrical interconnection portion is at least corresponding with the IP grade of described the first chamber that comprises power electronic device.

According to dependent claims, useful feature of the present utility model and specific embodiment thereof will become apparent.

Electrical interconnection portion can comprise the cable feedthrough for ac power cable.In the embodiment of electrical interconnection portion, the electrical interconnection portion of inverter comprises socket, and socket is arranged in the wall portion between the first chamber and the second chamber.Described socket can be configured for receiving connector, connector to be attached to the ac power cable from the second chamber side.In the embodiment of socket, socket comprises Wiring harness terminal, and Wiring harness terminal is configured to receive each the wire harness from the ac power cable of the second cavity side.

The first cap of inverter can comprise for the first cap is fixed on to the device on the first chamber, and wherein, if the second cap covers the second cavity, the second cap stops contact for fixing the described device of the first cap.For the device that the first cap is fixed on the first chamber, can comprise tongue piece, if the second cap covers the second chamber, tongue piece is covered by the second cap.

For the device that the first cap is fixed on the first chamber, can also comprise the through hole for being threaded, if the second cap covers the second chamber, through hole is covered by the second cap.

Below with reference to accompanying drawing and in the mode of example, the utility model is described in more detail.

Accompanying drawing explanation

Fig. 1 illustrates and comprises the first chamber of being separated by wall portion and the inverter case of the second chamber.

Fig. 2 illustrates the enlarged drawing of a part for the wall portion between the first chamber and the second chamber, and wall portion comprises the electrical interconnection portion between the first chamber and the second chamber.

Embodiment

Fig. 1 illustrates the inverter 10 that comprises housing 11.The housing 11 of inverter 10 comprises: the first chamber 12, and it can be covered by the first cap 12a; And second chamber 13, it can be covered by the second cap 13a.Power electronic device 14 is arranged in the first chamber 12.The first chamber 12 and the second chamber 13 are separated by wall portion 15, and wall portion 15 comprises the electrical interconnection portion 16 between the second chamber 13 and the first chamber 12.The second chamber 13 also comprises the DC connector 19a being attached in wall portion 15, to provide from the electrical interconnection between DC cable 19b and the power electronic device 14 of PV assembly (not shown).Main terminal 18 receives AC electric energy, and this AC electric energy is that power electronic device 14 utilizes the DC electric energy of input to produce.

Ac power cable 17 guided and via electrical interconnection portion 16 the wall portion 15 through the second chamber 13 and the first chamber 12.In the specific embodiment shown in Fig. 1, electrical interconnection portion 16 comprises the cable feedthrough (cable feed-through) with high IP grade.Main terminal 18 is arranged in the first chamber 12, and for receiving the wire harness separating of ac power cable 17.In electrical interconnection portion 16 in this case, the IP grade of passing the cable feedthrough of wall portion 15 equals the even IP grade higher than the first chamber 12.For outdoor electrical equipment, the each IP grade of IP44, IP54 or IP65 is common.

In order to provide suitable protection to make it not be subject to the impact of environment during outdoor work for power electronic device 14, for example, for the first chamber 12 that meets the high IP grade of having of above-mentioned outdoor electrical equipment requirement is provided, make the first cap 12a that covers the first chamber 12 comprise seal (not shown).Utilize the overall IPS (overall ingress protection) that the seal at the first chamber 12, the first cap 12a, the first cap 12a place and electrical interconnection portion 16 is provided to the first chamber 12 around the part of getting up of housing 11.Because electrical interconnection portion 16 has the IP grade at least identical with the IP grade of the first chamber 12, so electrical interconnection portion 16 can not make the overall IP grade of the first chamber 12 reduce.

The first cap 12a also has multiple tongue piece 12b.At least one in tongue piece 12b comprises through hole 12c, thereby is configured to: make screw pass through hole 12c and screw in screwed hole 12d, thus the first cap 12a being fixed on the first chamber 12.The second cap 13a covers tongue piece 12b, thereby in order to open the first cap 12a and to contact the first chamber 12, screw must can removed the second cap 13a before screwed hole 12d screws out.This enforceable order has prevented that electrician from opening the first cap 12a during conventional installation or maintenance activity.In other words, contact the inside of the first chamber 12 as long as no necessity, the second cap 13a that covers tongue piece 12b will stop the first cap 12a to open.

It should be noted, can similarly expect fixing the first cap 12a(and may be covered by the second cap 13a and stash or can not contact) option means, for example, suitable fixture, connecting rod, band, protuberance, lug, fish plate etc.Through hole 12c can be a part of the first cap 12a itself, and as long as the second cap 13a covers the second chamber 13, can cover the specific region that comprises through hole 12c in the first cap 12a with the second cap 13a.The through hole 12c not covered by the second cap 13a can also be combined for fixing extra means with above-mentioned.

Fig. 2 illustrates the detail view of the optional embodiment of electrical interconnection portion 16.Socket 20 is installed in wall portion 15, and described socket 20 has the IP grade at least identical with the grade of the first chamber 12.Socket 20 is received the connector 21 of ac power cable 17.According in the embodiment of Fig. 2, each wire harness of ac power cable 17 is connected to the Wiring harness terminal 22 as a part for connector 21.In optional embodiment, socket 20 can comprise Wiring harness terminal 22, thereby each wire harness of ac power cable is directly connected to socket 20.In any one embodiment; electrical interconnection portion 16 between the first chamber 12 and the second chamber 13 all has high IP grade; and can, easily when still protecting well the first chamber 12 not affected by environment, by removing the second cap 13a, access electrical interconnection portion 16.

Claims

1. the inverter for PV equipment (10), comprising:

Housing (11), it comprises the first chamber (12) and the second chamber (13);

The first cap (12a), it is configured to seal described the first chamber (12);

The second cap (13a), it is configured to seal described the second chamber (13),

The IPS grade of described the first chamber (12) is higher than the IPS grade of described the second chamber (13),

Described the first cap (12a) and described the second cap (13a) are arranged to: must remove before described the second cap (13a) can remove described the first cap (12a);

Power electronic device (14), it is arranged in described the first chamber (12);

Wall portion (15), it separates described the first chamber (12) and described the second chamber (13),

It is characterized in that: the described wall portion (15) of electrical interconnection portion (16) through described the first chamber (12) and described the second chamber (13) extends, and the IPS grade of described electrical interconnection portion (16) is greater than or equal to the IPS grade of described the first chamber (12).

2. inverter according to claim 1 (10), is characterized in that:

Described electrical interconnection portion (16) comprises the cable feedthrough for ac power cable (17).

3. inverter according to claim 1 (10), is characterized in that:

Described electrical interconnection portion (16) comprises socket (20), and described socket (20) is arranged in the described wall portion (15) between described the first chamber (12) and described the second chamber (13).

4. inverter according to claim 3 (10), is characterized in that:

Described socket (20) is configured for receiving connector (21), and described connector (21) is attached to the ac power cable (17) from described the second chamber (13) side.

5. inverter according to claim 3 (10), is characterized in that:

Described socket (20) comprises Wiring harness terminal (22), and described Wiring harness terminal (22) is configured to receive each the wire harness from the ac power cable (17) of described the second cavity (13) side.

6. inverter according to claim 1 (10), is characterized in that:

Described the first cap (12a) comprises for described the first cap (12a) is fixed on to the device on described the first chamber (12), if described the second cap (13a) covers described the second cavity (13), described the second cap (13a) stops the described device of contact for fixing described the first cap (12a).

7. inverter according to claim 6 (10), is characterized in that:

For the described device that described the first cap (12a) is fixed on described the first chamber (12), comprise tongue piece (12b), if described the second cap (13a) covers described the second chamber (13), described tongue piece (12b) is covered by described the second cap (13a).

8. inverter according to claim 6 (10), is characterized in that:

For the described device that described the first cap (12a) is fixed on described the first chamber (12), comprise the through hole (12c) for being threaded, if described the second cap (13a) covers described the second chamber (13), described through hole (12c) is covered by described the second cap (13a).