Static rectifier bridge structure of generator

Abstract

The utility model discloses a static rectifier bridge structure of a generator, and belongs to the technical field of rectification structure design of an oil-cooled generator. Lubricating oil is adopted for cooling, and the lubricating oil enters from an inlet of the rectifier bridge box, flows through the six diodes, flows out from an outlet of the rectifier bridge box and is used for heat dissipation of a stator in the motor. In order to increase the heat dissipation area of the diode, the diode is installed in the groove of the cooling fin after being pressed with the lug, and the fin design of the cooling fin can effectively increase the heat dissipation area and reduce the flow loss. And finally, the lug plate extending out of each diode is respectively connected to the outgoing lines A, B and C and the output positive and negative according to a schematic diagram. The rectifier bridge is high in universality and convenient to maintain, mount and dismount, the temperature on the rectifier bridge can be quickly dissipated through the heat dissipation structure of the rectifier bridge, and it is guaranteed that the rectifier bridge stably works after large current passes through the rectifier bridge.

Description

Technical Field

[0001] This utility model discloses a static rectifier bridge structure for a generator, belonging to the technical field of rectifier structure design for oil-cooled generators. Background Technology

[0002] For generators, a rectifier bridge is generally needed to achieve AC-DC conversion. For high-power generators, the output power is large. When the output voltage is fixed, the current passing through the diodes on the rectifier bridge will also be large. If the current on the diode is large, the temperature of the entire diode will be high. Since diodes generally have a low temperature resistance rating, quickly and effectively dissipating the temperature on the diode body has become an urgent problem to be solved in motor design. Summary of the Invention

[0003] The purpose of this utility model is:

[0004] The purpose of this utility model is to provide a highly versatile, easy-to-maintain, convenient-to-install and disassemble rectifier bridge with a heat dissipation structure that can quickly dissipate the temperature on the rectifier bridge, ensuring stable operation of the rectifier bridge after passing a large current.

[0005] The technical solution of this utility model is: a generator static rectifier bridge structure, including: diode 1, heat sink 3, three-phase terminals 4, output terminals 5, and crimping plate 6; the diode 1 is fixed in the heat sink 3 by the crimping plate 6, and the diode 1 includes diodes V1-V6; after the A-phase wire of the three-phase terminal 4 is led out, it is connected to the anode of diode V1 through the crimping plate 6 and soldered; the anode lead of diode V1 is connected to the cathode of diode V2 through the crimping plate 6; the cathode of diode V2 is connected to the anode of diode V4; the cathode of diode V4 is connected to the anode of diode V3; the cathode of diode V3 is connected to the cathode of diode V5; the anode of diode V5 is connected to the cathode of diode V6; the cathode of diode V6 is connected to the C-phase of the three-phase terminal 4; and the cathode of diode V4 is connected to the B-phase of the three-phase terminal 4; and the cathodes of diodes V1 and V3 and the anodes of diodes V4 and V6 are connected by wires; finally, the cathodes of diode V1 and the anode of diode V2 are respectively connected to the output terminals 5.

[0006] The contact between diode 1 and heat sink 3 is a planar contact.

[0007] The heat sink 3 is fixed in a groove of the same size as the heat sink 3 on the generator housing and the fuel tank end cover, and is secured by screws on the fuel tank end cover.

[0008] The heat sinks 3 shown are arranged sequentially along the flow direction.

[0009] The heat sink 3 has a planar groove, and the diode 1 is completely enclosed in the groove.

[0010] The diode 1 is a high-temperature fast-moving planar diode.

[0011] The generator housing is provided with an oil inlet 7 and an oil outlet 2.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides a highly versatile, easy-to-maintain, convenient-to-install and disassemble rectifier bridge with a heat dissipation structure that can quickly dissipate the temperature on the rectifier bridge, ensuring stable operation of the rectifier bridge after passing a large current. Attached Figure Description

[0014] Figure 1 Front view of the stationary rectifier bridge;

[0015] Figure 2 3D view of a stationary rectifier bridge;

[0016] Figure 3 Schematic diagram of diode composition;

[0017] Figure 4 Schematic diagram of the crimping plate structure;

[0018] Figure 5 Schematic diagram of heat sink structure;

[0019] Figure 6 Schematic diagram.

[0020] Wherein: 1-Diode, 2-Oil outlet, 3-Heat sink, 4-Three-phase terminal, 5-Output terminal, 6-Crimping tab, 7-Oil inlet. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figure 1As shown, a generator static rectifier bridge structure includes: diode 1, heat sink 3, three-phase terminals 4, output terminals 5, and crimping tabs 6. Diode 1 is fixed within the heat sink 3 by the crimping tabs 6, effectively transferring heat from the diode. Diode 1 includes diodes V1-V6. The arrangement of the heat sink 3 saves space. The A-phase wire from the three-phase terminals 4 is led out and connected to the anode of diode V1 via the crimping tabs 6 and soldered. Diode V1 is surrounded by the heat sink 3. The anode lead of diode V1 is connected to the cathode of diode V2 via the crimping tabs 6. The cathode of diode V2 is connected to the anode of diode V4. The cathode of diode V4 is connected to the anode of diode V3. The cathode of diode V3 is connected to the cathode of diode V5. The anode of diode V5 is connected to the cathode of diode V6. The cathode of diode V6 is connected to the C-phase of the three-phase terminals 4, and the cathode of diode V4 is connected to the B-phase of the three-phase terminals 4. Furthermore, the cathodes of diodes V1 and V3, and the anodes of diodes V4 and V6 are connected together by wires. Finally, connect the cathode of diode V1 and the anode of diode V2 to the output terminal 5. This forms a three-phase full-bridge rectifier circuit, which outputs DC voltage to supply power to the grid.

[0023] The contact between the diode 1 and the heat sink 3 is a planar contact, which is beneficial for the pressing of the pressing piece 6.

[0024] The heat sink 3 is fixed in a groove of the same size as the heat sink 3 on the generator housing and the fuel tank end cover, and is secured by screws on the fuel tank end cover.

[0025] The heat sink 3 shown has a heat dissipation fin design; the quality of the heat dissipation fin design directly determines the heat dissipation performance. The fins are arranged sequentially along the flow direction. No resistance is introduced in the flow direction, reducing flow resistance and increasing the heat dissipation area.

[0026] The heat sink 3 is provided with a planar groove, and the diode 1 is completely wrapped in the groove, which not only fixes the diode 1 to a certain extent, but also increases the heat dissipation area of ​​the diode 1, and facilitates soldering and installation.

[0027] Diode 1 is a high-temperature, fast-speed planar diode.

[0028] An oil inlet 7 and an oil outlet 2 are provided on the generator housing.

[0029] The three-phase current output by the motor is rectified from AC to DC by a three-phase full-wave rectifier bridge. Since a large current flows through diode 1, it generates heat. This heat first passes through the heat sink 3, which is in direct contact with the diode. The heat sink 3 increases the heat dissipation area of ​​diode 1, allowing the heat to dissipate quickly. The lubricating oil enters from the oil inlet 1, flows through the six diodes 1 and their heat sinks 3, and then flows out from the oil outlet 2 of the rectifier bridge box for cooling the stator inside the motor.

Claims

1. A generator static rectifier bridge structure, characterized in that, include: Diode (1), heat sink (3), three-phase terminal (4), output terminal (5), crimping plate (6); the diode (1) is fixed in the heat sink (3) by the crimping plate (6), and the diode (1) includes diodes V1-V6; after the A phase line of the three-phase terminal (4) is led out, it is connected to the anode of diode V1 through the crimping plate (6) and soldered. The anode lead of diode V1 is connected to the cathode of diode V2 through the crimping plate (6). The cathode of diode V2 is connected to the anode of diode V4. The cathode of diode V4 is connected to the anode of diode V3. The cathode of diode V3 is connected to the cathode of diode V5. The anode of diode V5 is connected to the cathode of diode V6. The cathode of diode V6 is connected to the C phase of the three-phase terminal (4). The cathode of diode V4 is connected to the B phase of the three-phase terminal (4). And the cathodes of diode V1 and diode V3 and the anodes of diode V4 and diode V6 are connected with wires. Finally, the cathodes of diode V1 and the anode of diode V2 are connected to the output terminal (5) respectively.

2. The generator static rectifier bridge structure according to claim 1, characterized in that, The contact between the diode (1) and the heat sink (3) is a planar contact.

3. The generator static rectifier bridge structure according to claim 1, characterized in that, The heat sink (3) is fixed in a groove of the same size as the heat sink (3) on the generator housing and the oil tank end cover, and is secured by screws on the oil tank end cover.

4. The generator static rectifier bridge structure according to claim 1, characterized in that, The heat sinks (3) shown are arranged sequentially along the flow direction.

5. The generator static rectifier bridge structure according to claim 1, characterized in that, The heat sink (3) has a planar groove, and the diode (1) is completely enclosed in the groove.

6. The generator static rectifier bridge structure according to claim 1, characterized in that, The diode (1) is a high-temperature fast planar diode.

7. The generator static rectifier bridge structure according to claim 3, characterized in that, The generator housing is provided with an oil inlet (7) and an oil outlet (2).

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