Efficient rectifying device

Abstract

The utility model relates to the field of automobile parts, and discloses an efficient rectifying device. Comprising a housing, the housing is arranged on a generator shell, a generator rotating shaft and a stator assembly are arranged in the generator shell, and the housing is communicated with an air inlet pipe; a rectifier body is mounted in the housing, a carbon brush box is arranged on the rectifier body, and the carbon brush box is rotationally and electrically connected with a rotating shaft of the generator; a plurality of heat dissipation through holes are formed in the rectifier body and correspond to the air inlet pipes; a heat dissipation assembly is arranged on the rectifier body; a bridge bracket is pressed on the rectifier body, and an insert is arranged on the bridge bracket; the rectifier body is provided with a power assembly, and the power assembly is electrically connected with the stator assembly, the insert and the rectifier body. According to the utility model, the heat dissipation assembly and the power assembly are arranged, the heat dissipation assembly can efficiently dissipate heat, the power assembly is the Mosfet, and the Mosfet is low in power consumption, low in heat productivity and high in rectification power, so that the temperature in the housing is not too high, and the rectification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile accessories, and specifically discloses a high-efficiency rectifying device. Background Art

[0002] A high-frequency rectifier is a rectifying device, which is simply a high-frequency switching power supply device that converts alternating current (AC) into direct current (DC). It has two main functions: first, it converts alternating current (AC) into direct current (DC) and supplies it to the load or inverter after filtering; second, it provides charging voltage to the battery. Therefore, it also acts as a charger.

[0003] Searching the prior art, the patent application with publication number CN204205973U discloses an automobile rectifier, which includes a bridge bracket, a positive rectifier diode, a positive plate, an alumina plate, a negative rectifier diode and a negative plate. The positive rectifier diode is pressed onto the positive plate, the negative rectifier diode is pressed onto the negative plate, the positive plate and the negative plate are interference fit with the ribs on the bridge bracket, the alumina plate is arranged on the positive plate, and an insulating component is arranged between the alumina plate and the positive plate; the insulating component includes an insulating film attached to the positive plate, an insulating pad attached to the alumina plate, and an insulating resin bonding the insulating film and the insulating pad.

[0004] The technical solution has the following problems: when the rectifier is working, the thermal effect of the current and the mechanical friction loss will generate a large amount of heat. In the prior art, only holes are provided on the rectifier for ventilation and heat dissipation, and all the heat generated by the rectifier is dissipated through the rectifier itself. The heat dissipation is slow, the heat dissipation efficiency is low, and the heat dissipation effect is poor. Since the performance of electrical components such as diodes on the rectifier is reduced when working under high temperature conditions, the rectification efficiency is reduced, affecting the rectifier performance. Utility Model Content

[0005] The utility model aims to solve the problems mentioned in the above background technology and invents a high-efficiency rectifying device.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-efficiency rectifier device comprises a cover shell, which is fixedly arranged at the rear part of a generator housing, in which a generator shaft is rotatably arranged and a stator assembly is fixedly arranged, and an air inlet duct is fixedly connected to the cover shell; a rectifier body is installed in the cover shell, and a carbon brush box is fixedly arranged on the rectifier body, and the carbon brush box is both rotatably connected to the generator shaft and electrically connected; a plurality of heat dissipation holes are provided on the rectifier body, and the heat dissipation holes correspond to the air inlet duct; a heat dissipation assembly is fixedly arranged on the rectifier body; the heat dissipation assembly is arranged at the connection between the carbon brush box and the generator shaft, and corresponds to the heat dissipation holes on the rectifier body; a press-fit bridge bracket is fixedly arranged on the rectifier body, and an insert is fixedly arranged on the bridge bracket; a power component is installed on the rectifier body, and the power component is electrically connected to the stator assembly, the insert and the rectifier body respectively.

[0008] Preferably, the heat dissipation assembly includes heat dissipation teeth and heat dissipation ducts; the heat dissipation teeth are composed of multiple heat dissipation fins, and the multiple heat dissipation fins are fixedly connected to the rectifier body, and the multiple heat dissipation fins are evenly distributed along the circumference of the generator shaft at the connection between the carbon brush box and the generator housing shaft; the heat dissipation duct is fixedly arranged on the rectifier body, and the heat dissipation duct corresponds to the heat dissipation through holes on the rectifier body; the heat dissipation duct is formed by connecting a number of heat dissipation fins end to end.

[0009] Preferably, the heat sink is a sheet structure made of aluminum alloy or brass.

[0010] Preferably, the power component includes a transistor, and the transistor is a Mosfet; the transistor is electrically connected to the stator component, the insert, and the rectifier body respectively.

[0011] Preferably, the insert is made of conductive metal, and includes a plate body, a U-shaped joint fixedly connected to the plate body, and an electrical connection plate offset on both sides of the plate body; the U-shaped joint is electrically connected to the stator assembly, and the electrical connection plate is electrically connected to the transistor.

[0012] Preferably, an air inlet is provided at an end of the generator housing close to the cover shell, and the generator housing is connected to the cover shell through the air inlet.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] First, the utility model is provided with a heat dissipation component and a power component, wherein the heat dissipation component can dissipate heat efficiently, and the power component is a Mosfet, which has a low on-resistance characteristic, consumes little power, generates little heat, and has a high rectification power, so that the temperature inside the housing will not be too high, thereby improving the rectification efficiency.

[0015] Second, the two electrical connection plates in the insert of the utility model are staggered, so that the transistors connected to the electrical connection plates are staggered on the rectifier body, thereby reducing the installation area of ​​the transistors on the rectifier body, improving the space utilization of the rectifier body, and reducing the distance between two adjacent transistors, thereby reducing resistance and reducing heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is an overall schematic diagram of the rectifier of the utility model;

[0018] Figure 3 This is a schematic diagram of the rectifier decomposition of the utility model;

[0019] Figure 4 It is a schematic diagram of the insert of the utility model;

[0020] Figure 5 It is a partial structural schematic diagram of the utility model.

[0021] In the figure: 1. generator housing; 2. cover; 3. air inlet pipe; 4. rectifier body; 5. bridge bracket; 6. heat dissipation teeth; 7. insert; 8. carbon brush box; 9. regulator; 10. transistor; 11. mounting hole; 12. positioning groove; 13. positioning hole; 14. heat dissipation through hole; 15. positioning column; 16. heat dissipation air duct. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5 The utility model provides an embodiment: a high-efficiency rectifier device, including a cover 2, the cover 2 is bolted and fixedly connected to the generator housing 1, and the cover 2 is coaxially covered at the tail of the generator housing 1. An air inlet pipe 3 is fixedly welded on the cover 2, and the air inlet pipe 3 can be connected to an exhaust fan or other air ducts. A rectifier body 4 is arranged in the cover 2, and the rectifier body 4 is fan-shaped and coaxial with the generator housing 1. The cover 2 is used to protect the rectifier body 4.

[0024] A positioning column 15 and three bolts are welded to the tail of the generator housing 1. Three positioning grooves 12 and one positioning hole 13 are drilled on the rectifier body 4, and the three positioning grooves 12 and one positioning hole 13 are evenly distributed along the circumference of the rectifier body 4. The positioning column 15 passes through the positioning hole 13, and the three bolts correspond to the three positioning grooves 12 one by one, and each bolt passes through the corresponding positioning groove 12. It is used to position and fix the rectifier body 4 at the tail of the generator housing 1.

[0025] The bridge bracket 5 matching the rectifier body 4 is fixed and pressed on the end surface away from the generator housing 1 by three sets of matching bolts and nuts. The positioning column 15 passes through the bridge bracket 5 and the bridge bracket 5 is initially positioned and fixed by the nut connected by thread. The bridge bracket 5 is a plastic plate, which is used to protect the rectifier body 4 and also to fix and install three inserts 7. The three inserts 7 are all conductive metal plates. One end of each insert 7 is a U-shaped connection terminal for electrically connecting the coil joints in the three-phase winding on the stator assembly. The other end of each insert 7 is an electrical connection plate arranged on both sides of the plate body in a staggered manner.

[0026] The two staggered electrical connection plates on each insert 7 are electrically connected to a transistor 10. The transistor 10 is a Mosfet. Mosfet has low on-resistance characteristics, low power consumption, low heat generation, and high rectification power, and is used to improve rectification efficiency. The two transistors 10 electrically connected to the same insert 7 are also staggered, one is located on the inner circumference of the rectifier body 4, and the other is located on the outer circumference of the rectifier body 4. The two are located on different radial lines of the rectifier body 4, thereby reducing the installation area of ​​the transistor 10 on the rectifier body 4.

[0027] Six mounting holes 11 are drilled on the rectifier body 4 , and a transistor 10 is mounted in each mounting hole 11 .

[0028] The three transistors 10 located on the outer circumference of the rectifier body 4 are fixedly pressed on the generator housing 1, and the three transistors 10 located on the inner circumference of the rectifier body 4 are fixedly pressed on the rectifier body 4. The rectifier body 4 is connected to the positive terminal as a positive plate, and the generator housing 1 is connected to the negative terminal as a negative plate.

[0029] The carbon brush box 8 and the regulator 9 are fixed by screws on the rectifier body 4, wherein the carbon brush box 8 is electrically connected to the regulator 9. The carbon brush box 8 is rotatably sleeved on the generator shaft and is electrically connected to the generator shaft to provide current for the excitation winding of the generator. The generator shaft is coaxially installed in the generator housing 1 and is rotatably connected to the generator housing 1.

[0030] A heat dissipation component is fixedly mounted on the rectifier body 4, and the heat dissipation component is used for efficient heat dissipation. The heat dissipation component includes heat dissipation teeth 6 and heat dissipation air ducts 16. The heat dissipation teeth 6 are composed of multiple heat dissipation fins, and the heat dissipation fins are sheet structures made of aluminum alloy or brass. The multiple heat dissipation fins are evenly distributed along the circumference of the inner circumference of the rectifier body 4 close to the generator shaft, and the multiple heat dissipation fins surround the connection between the carbon brush box 8 and the generator shaft, which are used for heat dissipation of the rectifier body 4 itself, and for heat dissipation of the carbon brush box 8 and the generator shaft.

[0031] A plurality of heat dissipation holes 14 are drilled on the rectifier body 4, and each heat dissipation hole 14 corresponds to a heat dissipation duct 16, and the heat dissipation duct 16 is fixedly connected to the rectifier body 4. The heat dissipation duct 16 is an air flow channel made by connecting a plurality of heat dissipation fins end to end, and the heat dissipation duct 16 is located at the opening of the heat dissipation hole 14, and the heat dissipation duct 16 is connected to the heat dissipation hole 14, and is used to accelerate the heat dissipation of the rectifier body 4, and is also used to quickly contact the cold air flowing through the heat dissipation hole 14 to achieve cooling.

[0032] An air inlet is provided at the rear of the generator housing 1 , and the generator housing 1 is connected to the cover 2 through the air inlet, so that a gas flow passage is formed in the cover 2 .

[0033] Working principle:

[0034] During the power generation process, the rectifier body 4, the carbon brush box 8 and the regulator 9 start to work. During the operation, a large amount of heat will be generated due to the thermal effect of the current. A small part of the heat generated by the rectifier body 4 is dissipated into the air by itself, and most of the rest is transferred and concentrated on the heat dissipation teeth 6 and the heat dissipation duct 16. The heat is quickly dissipated into the air through the heat dissipation teeth 6 and the heat dissipation duct 16. The heat dissipation of the rectifier body 4 is accelerated. At the same time, the friction between the carbon brush box 8 and the generator shaft will also generate a large amount of heat, which is dissipated into the air through the carbon brush box 8 and the generator shaft.

[0035] The hot air generated by the heat dissipation in the casing 2 is dissipated through the air inlet of the generator housing 1 .

[0036] In this working principle, the air inlet pipe 3 is connected to the exhaust fan as an example for description.

[0037] While the rectifier body 4, the carbon brush box 8 and the regulator 9 are working, the exhaust fan is also working. The exhaust fan draws the cold air outside the housing 2 into the housing 2 through the air inlet pipe 3, and the cold air flows into the generator housing 1 through the air inlet of the generator housing 1 to dissipate the heat of the stator assembly. A part of the cold air in the housing 2 is first blown to the rectifier body 4 and contacts the rectifier body 4 to achieve cooling and heat dissipation, and the other part enters the heat dissipation duct 16 through the heat dissipation through hole 14 on the rectifier body 4. After the cold air contacts the heat sink of the heat dissipation duct 16, the rectifier body 4 is quickly cooled.

[0038] Thereby, the heat dissipation rate of the rectifier body 4 is accelerated again, so that the temperature inside the housing 2 is within the normal working range, thereby achieving efficient rectification.

[0039] At the same time, due to the use of Mosfet for rectification, according to the characteristics of Mosfet with low on-resistance, low power consumption, low heat generation, high rectification power, etc., efficient rectification is achieved.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-efficiency rectifier device, comprising a housing (2), wherein the housing (2) is fixedly arranged at the rear of a generator housing (1), wherein the generator housing (1) is provided with a generator shaft for rotation and a stator assembly for fixed arrangement, and wherein: The cover (2) is fixedly connected to the air inlet pipe (3); a rectifier body (4) is installed in the cover (2), a carbon brush box (8) is fixedly arranged on the rectifier body (4), and the carbon brush box (8) is both rotationally connected and electrically connected to the generator shaft; a plurality of heat dissipation holes (14) are provided on the rectifier body (4), and the heat dissipation holes (14) correspond to the air inlet pipe (3); a heat dissipation component is fixedly arranged on the rectifier body (4); the heat dissipation component is arranged at the connection between the carbon brush box (8) and the generator shaft, and corresponds to the heat dissipation holes (14) on the rectifier body (4); a press-fit bridge bracket (5) is fixedly arranged on the rectifier body (4), and an insert (7) is fixedly arranged on the bridge bracket (5); a power component is installed on the rectifier body (4), and the power component is electrically connected to the stator component, the insert (7), and the rectifier body (4) respectively.

2. The high-efficiency rectifier device according to claim 1, characterized in that: The heat dissipation assembly comprises a heat dissipation tooth (6) and a heat dissipation duct (16); the heat dissipation tooth (6) is composed of a plurality of heat dissipation fins, the plurality of heat dissipation fins are fixedly connected to the rectifier body (4), and the plurality of heat dissipation fins are evenly distributed along the circumference of the generator shaft at the connection between the carbon brush box (8) and the generator housing (1) shaft; the heat dissipation duct (16) is fixedly arranged on the rectifier body (4), and the heat dissipation duct (16) corresponds to the heat dissipation through hole (14) on the rectifier body (4); the heat dissipation duct (16) is formed by connecting a plurality of heat dissipation fins end to end.

3. The high-efficiency rectifier device according to claim 2, characterized in that: The heat sink is a sheet structure made of aluminum alloy or brass.

4. The high-efficiency rectifier device according to claim 1, characterized in that: The power component comprises a transistor (10), and the transistor (10) is a MOSFET; the transistor (10) is electrically connected to the stator component, the insert (7), and the rectifier body (4) respectively.

5. The high-efficiency rectifier device according to claim 4, characterized in that: The insert (7) is made of conductive metal, and comprises a plate body, a U-shaped connection terminal fixedly connected to the plate body, and an electrical connection plate staggeredly arranged on both sides of the plate body; the U-shaped connection terminal is electrically connected to the stator assembly, and the electrical connection plate is electrically connected to the transistor (10).

6. The high-efficiency rectifying device according to claim 1, characterized in that: An air inlet is provided at an end of the generator housing (1) close to the cover (2), and the generator housing (1) is connected to the cover (2) via the air inlet.

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