Structure of a high-power brushless cooling fan power module

Abstract

The present invention relates to the technical field of cooling fan controller assemblies, and in particular to a structure of a high-power brushless cooling fan power module. The structure of the power module for a high-power brushless cooling fan with reverse connection prevention includes a conductive sheet group and a pin group. The conductive sheet group includes a first conductive sheet, a second conductive sheet, a third conductive sheet, a fourth conductive sheet, a fifth conductive sheet, a sixth conductive sheet, and a seventh conductive sheet. The pin group includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, and a sixth pin provided on the first conductive sheet. It effectively improves the current-carrying capacity of the system, saves a certain amount of space, has a power supply reverse connection prevention function, improves the heat dissipation efficiency, improves the safety performance of the motor, is applicable to various motors in the automotive industry, and has a clever combination of electronic and mechanical structures, is easy to implement, and has good prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling fan controller assemblies, and particularly to a structure of a high-power brushless cooling fan power module. Background Art

[0002] At present, with the increase in the number of vehicle parts, vehicle manufacturers have put forward certain requirements for the space of products, and the required technical requirements are achieved with less occupied space. At the same time, for motor products in the automotive industry, especially engine cooling fan products, because the temperature in the engine compartment is relatively high, under certain driving conditions, especially in a relatively humid and hot environment, the cooling fan operates at a high speed. At this time, the static pressure received by the cooling fan is relatively large, and the current of the corresponding cooling fan system is relatively large. When the electronic protection of the controller fails, it will cause the controller to have too high a temperature and pose a potential fire hazard. At the same time, during the process of wire harness production or the welding of the wire harness and the cooling fan controller by the cooling fan manufacturer, if there are operation errors, resulting in the reverse welding of the positive and negative poles of the wire harness, the entire controller will be burned out during testing. To ensure the heat dissipation performance of the automotive engine system and improve the safety of the cooling fan is an issue that needs to be solved currently. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing cooling fan has low performance and there are potential safety hazards.

[0004] A structure of a high-power brushless cooling fan power module, characterized in that it includes:

[0005] A conductive sheet group

[0006] The conductive sheet group includes a first conductive sheet, a second conductive sheet, a third conductive sheet, a fourth conductive sheet, a fifth conductive sheet, a sixth conductive sheet and a seventh conductive sheet.

[0007] A pin group

[0008] The pin group includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin and a sixth pin provided on the first conductive sheet. Among them, the first pin is used for welding the negative pole of a provided thin film capacitor, the second pin, the third pin and the fourth pin are used for welding the negative pole pins of a provided electrolytic capacitor, the fifth pin is used for collecting the current at the end of a provided sampling resistor, and the sixth pin is used for welding to the ground terminal of a provided printed circuit board.

[0009] Further, a seventh pin, an eighth pin, and a ninth pin are provided on the second conductive sheet. The seventh pin is used to connect to an inductor provided, and the eighth pin is used to connect to the positive pin of a thin-film capacitor provided; a tenth pin, an eleventh pin, a twelfth pin, and a thirteenth pin are provided on the fifth conductive sheet. The tenth pin, the eleventh pin, and the twelfth pin are used to weld to an inductor provided.

[0010] Further, a fourteenth pin and a fifteenth pin are provided on the sixth conductive sheet. The fourteenth pin is used to connect to the positive electrode of the printed circuit board, and the fifteenth pin is used to weld to the inductor.

[0011] Further, an eighth conductive sheet, a ninth conductive sheet, and a tenth conductive sheet are also provided. A sixteenth pin is provided on the eighth conductive sheet. The sixteenth pin is used to connect to the U-phase acquisition circuit of the printed circuit board. A seventeenth pin is provided on the ninth conductive sheet. The seventeenth pin is used to connect to the V-phase acquisition circuit on the printed circuit board. An eighteenth pin is provided on the tenth conductive sheet. The eighteenth pin is used to connect to the W-phase acquisition circuit of the printed circuit board.

[0012] Further, an eleventh conductive sheet is also provided. A nineteenth pin and a first screw hole are provided on the eleventh conductive sheet. The nineteenth pin is used to connect to the electromagnetic circuit part of the printed circuit board. The first screw hole is connected to the metal bracket of a motor provided by a screw; a twentieth pin is provided on the seventh conductive sheet. The twentieth pin is used to connect to the current acquisition circuit of the printed circuit board.

[0013] Further, a twelfth conductive sheet, a thirteenth conductive sheet, a fourteenth conductive sheet, a fifteenth conductive sheet, a sixteenth conductive sheet, a seventeenth conductive sheet, an eighteenth conductive sheet, a nineteenth conductive sheet, a twentieth conductive sheet, and a twenty-first conductive sheet are also provided. The twelfth conductive sheet is used to connect to the PWM / Lin signal circuit part of the printed circuit board. The thirteenth conductive sheet is used to connect to the ignition signal circuit part of the printed circuit board. The fourteenth conductive sheet is used to connect to the gate of an anti-reverse-connection high-power field effect transistor and the anti-reverse-connection field effect transistor circuit part of the printed circuit board. The fifteenth conductive sheet, the sixteenth conductive sheet, the seventeenth conductive sheet, the eighteenth conductive sheet, the nineteenth conductive sheet, the twentieth conductive sheet, and the twenty-first conductive sheet are respectively used to connect to the gate of a high-power field effect transistor and the high-power field effect transistor drive circuit part of the printed circuit board.

[0014] Further, the conductive sheet group adopts a plastic coating process.

[0015] Further, it includes a power module, an electronic stator metal bracket, an electronic control module, and a metal sealing cover. The power module is connected to the electronic stator metal bracket through a heat-conducting adhesive.

[0016] Further, the electronic control module is welded to the power module.

[0017] Further, the metal sealing cover is pasted to the electronic stator metal bracket.

[0018] The beneficial effects of the present invention are as follows: The structure of the power module of the anti-reverse connection high-power brushless cooling fan of the present invention effectively improves the current-carrying capacity of the system, saves a certain amount of space, has a power anti-reverse connection function, improves the heat dissipation efficiency, improves the safety performance of the motor, is applicable to various motors in the automotive industry, and has a clever cooperation between the electronic and mechanical structures, is easy to implement, and has good prospects. Description of the Drawings

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the internal copper sheet of the mechanical structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall mechanical structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the electronic structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the overall electronic and mechanical structure of the present invention.

[0024] In the figure, 3 is the first conductive sheet, 4 is the second conductive sheet, 5 is the third conductive sheet, 11 is the fourth conductive sheet, 30 is the fifth conductive sheet, 35 is the sixth conductive sheet, 36 is the seventh conductive sheet, 6 is the first pin, 24 is the second pin, 26 is the third pin, 28 is the fourth pin, 21 is the fifth pin, 34 is the sixth pin, 5 is the seventh pin, 7 is the eighth pin, 9 is the ninth pin, 30 is the fifth conductive sheet, 25 is the tenth pin, 27 is the eleventh pin, 29 is the twelfth pin, 23 is the thirteenth pin, 35 is the sixth conductive sheet, 10 is the fourteenth pin, 11 is the fifteenth pin, 12 is the eighth conductive sheet, 17 is the ninth conductive sheet, 37 is the tenth conductive sheet, 32 is the sixteenth pin, 18 is the seventeenth pin, 20 is the eighteenth pin, 38 is the eleventh conductive sheet, 13 is the nineteenth pin, 39 is the first screw hole, 36 is the seventh conductive sheet, 19 is the twentieth pin, 1 is the twelfth conductive sheet, 2 is the thirteenth conductive sheet, 8 is the fourteenth conductive sheet, 13 is the fifteenth conductive sheet, 14 is the sixteenth conductive sheet, 15 is the seventeenth conductive sheet, 16 is the eighteenth conductive sheet, 22 is the nineteenth conductive sheet, 33 is the twentieth conductive sheet, 31 is the twenty - first conductive sheet, 115 is the power module, 116 is the electronic stator metal bracket, 112 is the electronic control module, 111 is the metal sealing cover, 114 is the electrolytic capacitor, 119 is the thin - film capacitor, 118 is the inductor, 113 is the anti - reverse - connection field - effect transistor, 117 is the three - phase bridge drive field - effect transistor, 103 is the sampling resistor, 109 is the conductive sheet. Detailed implementation mode

[0025] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic way, so they only show the components related to the present invention.

[0026] Embodiment

[0027] A structure of a high - power brushless cooling fan power module, characterized in that it includes:

[0028] A group of conductive sheets

[0029] The group of conductive sheets includes the first conductive sheet 3, the second conductive sheet 4, the third conductive sheet 5, the fourth conductive sheet 11, the fifth conductive sheet 30, the sixth conductive sheet 35 and the seventh conductive sheet 36.

[0030] A group of pins

[0031] The pin group includes a first pin 6, a second pin 24, a third pin 26, a fourth pin 28, a fifth pin 21, and a sixth pin 34 provided on the first conductive sheet 3. Among them, the first pin 6 is used to weld the negative electrode of the provided thin-film capacitor, the second pin 24, the third pin 26, and the fourth pin 28 are used to weld the negative electrode pins of the provided electrolytic capacitor, the fifth pin 21 is used to collect the current at the sampling resistor terminal, the sixth pin 34 is used to weld to the ground terminal of the provided printed circuit board. The second conductive sheet 4 is provided with a seventh pin 5, an eighth pin 7, and a ninth pin 9. The seventh pin 5 is used to connect to the provided inductor, and the eighth pin 7 is used to connect to the positive electrode pin of the provided thin-film capacitor; the fifth conductive sheet 30 is provided with a tenth pin 25, an eleventh pin 27, a twelfth pin 29, and a thirteenth pin 23. The tenth pin 25, the eleventh pin 27, and the twelfth pin 29 are used to weld to the provided inductor. The sixth conductive sheet 35 is provided with a fourteenth pin 10 and a fifteenth pin 11. The fourteenth pin 10 is used to connect to the positive electrode of the printed circuit board, and the fifteenth pin 11 is used to weld to the inductor. There are also an eighth conductive sheet 12, a ninth conductive sheet 17, and a tenth conductive sheet 37. The eighth conductive sheet 12 is provided with a sixteenth pin 32, and the sixteenth pin 32 is used to connect to the U-phase acquisition circuit of the printed circuit board. The ninth conductive sheet 17 is provided with a seventeenth pin 18, and the seventeenth pin 18 is used to connect to the V-phase acquisition circuit on the printed circuit board. The tenth conductive sheet 37 is provided with an eighteenth pin 20, and the eighteenth pin 20 is used to connect to the W-phase acquisition circuit of the printed circuit board. There is also an eleventh conductive sheet 38, and the eleventh conductive sheet 38 is provided with a nineteenth pin 13 and a first screw hole 39. The nineteenth pin 13 is used to connect to the electromagnetic circuit part of the printed circuit board, and the first screw hole 39 is connected to the metal bracket of the provided motor using a screw; the seventh conductive sheet 36 is provided with a twentieth pin 19, and the twentieth pin 19 is used to connect to the current acquisition circuit of the printed circuit board. There are also a twelfth conductive sheet 1, a thirteenth conductive sheet 2, a fourteenth conductive sheet 8, a fifteenth conductive sheet 13, a sixteenth conductive sheet 14, a seventeenth conductive sheet 15, an eighteenth conductive sheet 16, a nineteenth conductive sheet 22, a twentieth conductive sheet 33, and a twenty-first conductive sheet 31. The twelfth conductive sheet 1 is used to connect the PWM / Lin signal circuit part of the printed circuit board, the thirteenth conductive sheet 2 is used to connect the ignition signal circuit part of the printed circuit board, the fourteenth conductive sheet 8 is used to connect the gate of the reverse-connection prevention high-power field effect transistor and the reverse-connection prevention field effect transistor circuit part of the printed circuit board. The fifteenth conductive sheet 13, the sixteenth conductive sheet 14, the seventeenth conductive sheet 15, the eighteenth conductive sheet 16, the nineteenth conductive sheet 22, the twentieth conductive sheet 33, and the twenty-first conductive sheet 31 are respectively used to connect the gate of the high-power field effect transistor and the high-power field effect transistor drive circuit part of the printed circuit board.

[0032] In a specific embodiment, the conductive sheet group adopts a plastic coating process.

[0033] In another specific embodiment, it includes a power module 115, an electronic stator metal bracket 116, an electronic control module 112, and a metal sealing cover 111. The power module 115 is connected to the electronic stator metal bracket 116 through a thermal conductive adhesive. The electronic control module 112 is welded on the power module 115, and the metal sealing cover 111 is pasted to the electronic stator metal bracket 116.

[0034] Figure 1 The layout structure of the copper sheets inside the power module is illustrated. Figure 2 It is the structure after the copper sheets inside the power module are plastic-coated. The reason for using plastic coating is that a certain insulation level needs to be achieved between the copper sheets. Figure 2 V1, V2, V3, V4, V5, V6, V7 shown in [ID] are reserved positions for Figure 3 the high-power field effect transistors used in the circuit diagram. R01 is the reserved position for Figure 3 the sampling resistor R01 used in the circuit diagram. The field effect transistors V1, V2, V3, V4, V5, V6 are used for the commutation of the three-phase motor, the field effect transistor V7 is used for preventing reverse connection of the power supply of the entire system, and R01 is used for current sampling of the system.

[0035] Figure 4 The motor stator metal bracket 116 for dissipating heat from the power module is illustrated in an exploded view. The electronic stator metal bracket 116 includes a waterproof cap 102, a waterproof breathable membrane 101, and screw holes for fixing the power module 115. The heat generated by the power module 115 is dissipated through the thermal conductive silicone grease between the power module 115 and the electronic stator metal bracket 116.

[0036] Figure 4 The power module 115 is illustrated in an exploded view. The power module 115 includes three electrolytic capacitors 114, a thin film capacitor 119, an inductor 118, an anti-reverse connection field effect transistor 113, three-phase bridge drive field effect transistors 117, a sampling resistor 103, and conductive sheets 109 connected to the three phases of the brushless motor. The three electrolytic capacitors 114, a thin film capacitor 119, and the inductor 118 are used to improve electromagnetic compatibility. The anti-reverse connection field effect transistor 113 is used for the anti-reverse connection function of the power supply. The sampling resistor 103 is used to collect the system current, realize the real-time detection of the current during the operation of the cooling fan, and improve the safety performance of the product. The switching signals of the drive field effect transistors 117 on the three-phase bridge are transmitted to the three-phase brushless motor through the three conductive sheets 109 to drive the operation of the cooling fan.

[0037] Figure 4The electronic control module 112 is illustrated in an exploded view. The electronic control module 112 is soldered to the pins protruding from the power module 115, and this structure saves a certain amount of space. The electronic control module 112 is used to detect the real-time temperature, real-time current, voltage signal, PWM / Lin signal, back electromotive force signal during the operation of the three-phase brushless motor, and the rotational speed of the motor operation, etc. inside the controller.

[0038] Enlightened by the above ideal embodiments according to the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Structure of a high-power brushless cooling fan power module, characterized in that: including a set of conductive sheets, which includes a first conductive sheet, a second conductive sheet, a third conductive sheet, a fourth conductive sheet, a fifth conductive sheet, a sixth conductive sheet, and a seventh conductive sheet a set of pins, which includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, and a sixth pin provided on the first conductive sheet. Among them, the first pin is used for soldering the negative electrode of a provided thin-film capacitor, the second pin, the third pin, and the fourth pin are used for soldering the negative electrode pins of a provided electrolytic capacitor, the fifth pin is used for collecting the current at the end of a provided sampling resistor, and the sixth pin is used for soldering with the ground terminal of a provided printed circuit board; a seventh pin, an eighth pin, and a ninth pin are provided on the second conductive sheet, the seventh pin is used for connecting with a provided inductor, and the eighth pin is used for connecting with the positive electrode pin of a provided thin-film capacitor; a tenth pin, an eleventh pin, a twelfth pin, and a thirteenth pin are provided on the fifth conductive sheet, and the tenth pin, the eleventh pin, and the twelfth pin are used for soldering with a provided inductor; a fourteenth pin and a fifteenth pin are provided on the sixth conductive sheet, the fourteenth pin is used for connecting with the positive electrode of the printed circuit board, and the fifteenth pin is used for soldering with the inductor; an eighth conductive sheet, a ninth conductive sheet, and a tenth conductive sheet are also provided. A sixteenth pin is provided on the eighth conductive sheet, and the sixteenth pin is used for connecting with the U-phase acquisition circuit of the printed circuit board. A seventeenth pin is provided on the ninth conductive sheet, and the seventeenth pin is used for connecting with the V-phase acquisition circuit on the printed circuit board. An eighteenth pin is provided on the tenth conductive sheet, and the eighteenth pin is used for connecting with the W-phase acquisition circuit of the printed circuit board 2. The structure of a high-power brushless cooling fan power module according to claim 1, characterized in that: An eleventh conductive sheet is also provided. A nineteenth pin and a first screw hole are provided on the eleventh conductive sheet. The nineteenth pin is used for connecting with the electromagnetic circuit part of the printed circuit board, and the first screw hole is connected to the metal bracket of a provided motor using a screw; a twentieth pin is provided on the seventh conductive sheet, and the twentieth pin is used for connecting with the current acquisition circuit of the printed circuit board 3. The structure of a high-power brushless cooling fan power module according to claim 1, characterized in that: Twelfth conductive sheet, thirteenth conductive sheet, fourteenth conductive sheet, fifteenth conductive sheet, sixteenth conductive sheet, seventeenth conductive sheet, eighteenth conductive sheet, nineteenth conductive sheet, twentieth conductive sheet, and twenty-first conductive sheet are also provided. The twelfth conductive sheet is used for connecting the PWM / Lin signal circuit part of the printed circuit board, the thirteenth conductive sheet is used for connecting the ignition signal circuit part of the printed circuit board, the fourteenth conductive sheet is used for connecting the gate of the anti-reverse connection high-power field effect transistor and the anti-reverse connection field effect transistor circuit part of the printed circuit board, and the fifteenth conductive sheet, sixteenth conductive sheet, seventeenth conductive sheet, eighteenth conductive sheet, nineteenth conductive sheet, twentieth conductive sheet, and twenty-first conductive sheet are respectively used for connecting the gate of the high-power field effect transistor and the high-power field effect transistor drive circuit part of the printed circuit board 4. The structure of a high-power brushless cooling fan power module according to claim 1, characterized in that: The set of conductive sheets adopts a plastic coating process 5. The structure of a high-power brushless cooling fan power module according to claim 1, characterized in that: It includes a power module, an electronic stator metal bracket, an electronic control module and a metal sealing cover. The power module is connected to the electronic stator metal bracket through a thermal conductive adhesive.

6. The structure of a high-power brushless cooling fan power module according to claim 5, characterized in that: The electronic control module is welded to the power module.

7. The structure of a high-power brushless cooling fan power module according to claim 6, characterized in that: The metal sealing cover is pasted to the electronic stator metal bracket.

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