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CN-224204414-U - Non-insulating three-phase bridge

CN224204414UCN 224204414 UCN224204414 UCN 224204414UCN-224204414-U

Abstract

The utility model belongs to the technical field of three-phase bridges, and particularly relates to a non-insulating three-phase bridge, which comprises a conductive bottom plate, an insulating shell, four external terminals, three bridge structures, a second spacer and three second jumping sheets. According to the utility model, the non-insulating design is adopted, the conductive bottom plate can be directly used as the negative electrode to be connected with the vehicle shell, an additional wire harness is not needed to connect the negative electrode with the vehicle shell, the installation and maintenance processes are greatly simplified, the assembly complexity and the fault risk of the connection point are reduced, the heat dissipation effect is good, the conductive bottom plate, the molybdenum sheet and other parts have good heat dissipation performance, heat generated during the chip working can be timely dissipated, the performance stability is effectively improved, the service life is prolonged, and the fault risk caused by overheating is reduced.

Inventors

  • GUAN HAIZHOU

Assignees

  • 昆山道铭晨伊半导体有限公司

Dates

Publication Date
20260505
Application Date
20250526

Claims (6)

  1. 1. A non-insulated three-phase bridge, comprising: a conductive base plate; The insulating shell is arranged on the top surface of the conductive bottom plate; The four external terminals are arranged on the top surface of the insulating shell at intervals side by side and comprise a direct current output end and three alternating current input ends; Three bridge structures are arranged in the insulating shell and are located below the alternating current input end in a one-to-one correspondence mode, and each bridge structure comprises: The first molybdenum sheet is arranged on the top surface of the conductive bottom plate, The first chip, the anode face is upward arranged and is arranged on the top surface of the first molybdenum sheet, The second molybdenum sheet is arranged on the top surface of the first chip and is connected with the corresponding alternating current input end, A first spacer positioned beside the first chip and on the top surface of the conductive bottom plate, A first jumping piece, the left end of which is arranged on the top surface of the first separation piece, the right end of which is arranged on the top surface of the second molybdenum piece, A third molybdenum sheet arranged on the top surface of the left end of the first jumping sheet, The second chip, the anode face is downward arranged and is arranged on the top surface of the third molybdenum sheet, The fourth molybdenum sheet is arranged on the top surface of the second chip; The second spacer is arranged on the top surface of the conductive bottom plate and positioned below the direct current output end, and the top surface is connected with the direct current output end; and the three second jumping sheets are sequentially overlapped between the second separation sheets and the top surfaces of the three fourth molybdenum sheets.
  2. 2. The uninsulated three phase bridge according to claim 1, wherein said external connection terminal comprises: the fixed nut is embedded in the top surface of the insulating shell; the locking bolt is in threaded sleeve joint with the locking bolt; The support gasket is sleeved outside the locking bolt; And one end of the connecting guide piece is sleeved on the locking bolt and arranged between the supporting gasket and the fixing nut, and the other end of the connecting guide piece penetrates into the insulating shell.
  3. 3. The uninsulated three-phase bridge according to claim 2, wherein the top surface of the insulated shell is formed with a receiving groove adapted to the fixing nut and provided with a bar-shaped through hole for the connecting tab to pass through.
  4. 4. The non-insulated three-phase bridge according to claim 1, wherein two sides of the insulating housing have flat areas, the top surfaces of the flat areas are provided with accommodating through holes, two sides of the conductive bottom plate are provided with mounting through holes, and the accommodating through holes correspond to the mounting through holes.
  5. 5. The uninsulated three phase bridge according to claim 4, wherein said flattened area is removably attached to said conductive mat by means of attachment bolts.
  6. 6. The non-insulated three-phase bridge according to claim 2, wherein the connection tabs included in the ac input terminal and the dc output terminal are symmetrically arranged with respect to a central axis of the conductive base plate in a longitudinal direction of the conductive base plate when projected.

Description

Non-insulating three-phase bridge Technical Field The utility model belongs to the technical field of three-phase bridges, and particularly relates to a non-insulated three-phase bridge. Background In the design of automotive circuits, single-wire designs are currently commonly used. Specifically, the three-phase bridge in the automobile circuit plays a role of converting alternating current output by the generator into direct current, after the alternating current-direct current conversion is completed, the positive electrode of the direct current output by the three-phase bridge is connected with the positive electrode of each electric equipment through a wire harness, the negative electrode of the electric equipment is directly connected with the automobile shell, and meanwhile, the automobile shell is connected with the negative electrode of the three-phase bridge, so that a complete closed loop is formed. The design mode enables the vehicle shell to be a common negative electrode loop of all electric appliances, so that the use of a negative electrode wire harness can be greatly reduced, the length and the overall complexity of the wire harness are effectively reduced, and the production cost is reduced, and meanwhile, the fault rate caused by the wire harness problem is also reduced. The current three-phase bridge generally adopts a full-insulation packaging process, namely, a rectifying circuit is sealed in an insulation box body, and external connection is realized only through three alternating current terminals and two direct current terminals. However, when the insulating three-phase bridge is applied to an automobile circuit, a special wire harness is additionally arranged to connect a direct current negative electrode of the three-phase bridge with an automobile shell, so that the assembly complexity and the fault risk of a connecting point are increased, in addition, the low heat conduction characteristic of the insulating box body restricts the heat dissipation efficiency of the three-phase bridge, the overheat of components is easily caused under the continuous high-load working condition, and the working stability and the service life are directly influenced. Disclosure of utility model The utility model aims to provide a non-insulated three-phase bridge, which solves the technical problems of high assembly complexity and connection point fault risk and poor heat dissipation effect of the insulated three-phase bridge in the prior art. The utility model discloses a non-insulated three-phase bridge, comprising: a conductive base plate; The insulating shell is arranged on the top surface of the conductive bottom plate; The four external terminals are arranged on the top surface of the insulating shell at intervals side by side and comprise a direct current output end and three alternating current input ends; Three bridge structures are arranged in the insulating shell and are located below the alternating current input end in a one-to-one correspondence mode, and each bridge structure comprises: The first molybdenum sheet is arranged on the top surface of the conductive bottom plate, The first chip, the anode face is upward arranged and is arranged on the top surface of the first molybdenum sheet, The second molybdenum sheet is arranged on the top surface of the first chip and is connected with the corresponding alternating current input end, A first spacer positioned beside the first chip and on the top surface of the conductive bottom plate, A first jumping piece, the left end of which is arranged on the top surface of the first separation piece, the right end of which is arranged on the top surface of the second molybdenum piece, A third molybdenum sheet arranged on the top surface of the left end of the first jumping sheet, The second chip, the anode face is downward arranged and is arranged on the top surface of the third molybdenum sheet, The fourth molybdenum sheet is arranged on the top surface of the second chip; The second spacer is arranged on the top surface of the conductive bottom plate and positioned below the direct current output end, and the top surface is connected with the direct current output end; and the three second jumping sheets are sequentially overlapped between the second separation sheets and the top surfaces of the three fourth molybdenum sheets. According to the application, the non-insulating design is adopted, the conductive bottom plate can be directly used as the negative electrode to be connected with the vehicle shell, an additional wire harness is not needed to connect the negative electrode with the vehicle shell, the installation and maintenance processes are greatly simplified, the assembly complexity and the fault risk of the connection point are reduced, the heat dissipation effect is good, the conductive bottom plate, the molybdenum sheet and other parts have good heat dissipation performance, heat generated during the chip working can be timely dis