Electronic power steering controller and electronic power steering system
By using a double-layer PCB design and pin header connection method, the problems of difficult installation and high cost of electronic power steering controllers are solved, achieving a compact structure, automated assembly and efficient heat dissipation.
Patent Information
- Application Number
- CN202520479733.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing electronic power steering controllers are large in size, which makes installation difficult and results in a low degree of automation. They also have many parts, complex structures, and high manufacturing costs.
It adopts a double-layer PCB design, which is connected by a fixing bracket, power header and signal header, and combined with a thermal grease layer to improve heat dissipation performance and realize modular assembly.
The simplified structure facilitates automated assembly, reduces manufacturing costs, and improves heat dissipation and ease of assembly.
Smart Images
Figure CN223934792U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive steering system technology, and in particular to an electronic power steering controller and an electronic power steering system. Background Technology
[0002] Electronic power steering (ESP) is a common steering assist system in modern automobiles. It is based on the traditional mechanical steering system but adds components such as a torque sensor, vehicle speed sensor, electronic control unit (ECU), reducer, and electric motor. Among these, the ESP controller, which includes the ECU, is one of the core components of the ESP system. With the continuous development and optimization of electronic control technology, the performance requirements for the ESP controller are becoming increasingly stringent.
[0003] Currently, the electronic power steering controller in electronic power steering systems is relatively large in size, which is not conducive to its installation on the steering system. At the same time, it has a large number of parts and a complex structure, resulting in low automation and high manufacturing costs. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing electronic power steering controllers, such as their relatively large overall size leading to installation difficulties, low automation, and high manufacturing costs, by providing an electronic power steering controller and an electronic power steering system.
[0005] This utility model is achieved through the following technical solution:
[0006] On the one hand, this utility model provides an electronic power steering controller, which includes an electric motor and an electronic drive unit. The electronic drive unit includes a control PCB board, a drive PCB board and a fixing component. The control PCB board and the drive PCB board are connected through the fixing component. The drive PCB board is connected to the electric motor and drives the electric motor to run.
[0007] The fixing component includes a fixing bracket, power pin headers, and signal pin headers; the fixing bracket is disposed between the control PCB board and the drive PCB board, and the power pin headers and the signal pin headers are disposed on the fixing bracket; the power pin headers and the signal pin headers pass through both ends of the fixing bracket and are respectively connected to the control PCB board and the drive PCB board.
[0008] Furthermore, the power header, the signal header, and the mounting bracket are integrally formed.
[0009] The electronic drive unit also includes fasteners. Fastening holes are provided on both the control PCB board and the drive PCB board. The fasteners pass through the fastening holes on the control PCB board and the drive PCB board respectively, and the fasteners are fixedly connected to the fixed bracket.
[0010] Furthermore, the control PCB board and the drive PCB board are arranged opposite to and parallel to each other, the power header is vertically connected to the control PCB board and the drive PCB board, and the signal header is vertically connected to the control PCB board and the drive PCB board.
[0011] Furthermore, both the power header and the signal header include a through-hole and a connector. The through-hole passes through and is fixed to the fixing bracket. The connector is located at both ends of the through-hole that extend out of the fixing bracket. The control PCB and the drive PCB have corresponding insertion holes. The connector is inserted into the insertion holes, and both the control PCB and the drive PCB abut against the through-hole.
[0012] Furthermore, the connector includes multiple insertion parts, and the insertion holes on the control PCB board and the drive PCB board each include multiple slots, with the multiple insertion parts of the connector simultaneously engaging with the multiple slots of the insertion hole.
[0013] Furthermore, a heat dissipation boss is provided on the connection end face of the motor, and electrical components are provided on the drive PCB board. The drive PCB board is connected to the connection end face, and the electrical components are arranged opposite to the heat dissipation boss.
[0014] Furthermore, a thermally conductive silicone grease layer is applied to the heat dissipation protrusion, and the heat dissipation protrusion contacts the electrical components disposed opposite to it through the thermally conductive silicone grease layer.
[0015] Furthermore, the electronic drive unit also includes a connector, which is provided with a power interface and a signal interface. A signal receiving processor is provided on the control PCB board, the power interface is connected to the control PCB board, and the signal interface is connected to the signal receiving processor.
[0016] Furthermore, the electronic power steering controller also includes a housing, which is snapped together with the motor to form a receiving space, the electronic drive unit is housed in the receiving space, and the power interface and the signal interface extend from the end face of the housing away from the motor.
[0017] On the other hand, the present invention provides an electronic power steering system, which includes the electronic power steering controller as described above.
[0018] The beneficial effects of this utility model are:
[0019] This utility model discloses an electronic power steering controller comprising a motor and an electronic drive unit. The electronic drive unit includes a control PCB board, a drive PCB board, and a fixing component. The control PCB board and the drive PCB board are connected via the fixing component. The drive PCB board is connected to the motor and drives the motor. The fixing component includes a fixing bracket, power pin headers, and signal pin headers. The fixing bracket is positioned between the control PCB board and the drive PCB board, and the power pin headers and signal pin headers are mounted on the fixing bracket. The power pin headers and signal pin headers pass through both ends of the fixing bracket and are respectively connected to the control PCB board and the drive PCB board. This utility model connects the two PCB boards using a pin header connection method, making the structure of the electronic power steering controller simpler and more compact, easier to assemble, and easier to automate, effectively reducing assembly costs. The use of a thermally conductive silicone grease layer to transfer heat effectively increases the heat dissipation area and improves heat dissipation performance. Attached Figure Description
[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of an electronic power steering system provided by this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of an electronic power steering controller provided by this utility model;
[0023] Figure 3 This is a schematic diagram of the disassembly structure of an electronic power steering controller provided by this utility model;
[0024] Figure 4 This is a simplified structural diagram of an electronic drive unit provided by this utility model;
[0025] Figure 5 This is a schematic diagram of the structure of an electronic power steering controller that does not include the housing of the electronic drive unit provided by this utility model;
[0026] Figure 6 This is a partial cross-sectional view of an electronic drive unit and motor assembly provided by this utility model;
[0027] Figure 7This is a schematic diagram of the connection structure between the electric motor assembly and the electronic drive unit housing provided by this utility model;
[0028] In the diagram, the corresponding labels are: 1-Electronic power steering system, 2-Input shaft, 3-Electronic power steering controller, 4-Inner and outer ball joint assembly, 5-Rubber dust cover, 6-Sensor housing, 7-Large housing, 8-Small housing, 9-Bolt, 30-Electronic drive unit, 31-Motor, 32-Connector, 33-Electronic drive unit housing, 34-Waterproof and breathable valve, 35-Control PCB board, 36-Fixing bracket, 37-Drive PCB board, 38-Fisheye terminal, 39-Thermal grease, 310-Small pulley, 311-Second clip, 312-Motor three-phase PIN, 3121-Motor first-phase PIN 3122 - Second phase PIN of motor, 3123 - Third phase PIN of motor, 3131 - First heat dissipation structure, 3132 - Second heat dissipation structure, 314 - BOSS post at the tail of motor, 315 - Groove on end face of motor, 316 - Bolt through hole, 317 - Motor housing, 321 - TAS interface, 322 - Power interface, 323 - CAN interface, 330 - First buckle, 331 - Circumferential rib, 332 - Groove on housing of electronic drive unit, 333 - , 350 - First slot, 351 - Second slot, 360 - Power header, 361 - Signal header, 370 - Third slot, 371 - Fourth slot. Detailed Implementation
[0029] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.
[0031] like Figure 1-7 As shown, this utility model provides an electronic power steering controller 3, which includes a motor 31 and an electronic drive unit 30. The electronic drive unit 30 includes a control PCB board 35, a drive PCB board 37 and a fixing component. The control PCB board 35 and the drive PCB board 37 are connected through the fixing component. The drive PCB board 37 is connected to the motor 31 and drives the motor 31 to run.
[0032] The aforementioned fixing assembly includes a fixing bracket 36, power pin headers 360, and signal pin headers 361. The fixing bracket 36 is disposed between the control PCB board 35 and the drive PCB board 37. The power pin headers 360 and the signal pin headers 361 are disposed on the fixing bracket 36. The power pin headers 360 and the signal pin headers 361 pass through both ends of the fixing bracket 36 and are respectively connected to the control PCB board 35 and the drive PCB board 37.
[0033] For example, the power header 360, the signal header 361, and the fixing bracket 36 are integrally formed structures;
[0034] The aforementioned electronic drive unit 30 also includes fasteners. Fastening holes are provided on both the control PCB board 35 and the drive PCB board 37. The fasteners pass through the fastening holes on the control PCB board 35 and the drive PCB board 37 respectively, and are fixedly connected to the fixed bracket 36.
[0035] Furthermore, the circuit board assembly in this invention mainly consists of a control circuit, a drive circuit, and a connector 32. The connector 32 is used to transmit power, CAN signals, and torque / angle signals from the steering system and the entire vehicle. CAN (Controller Area Network) is a bus system used to send control information and data, enabling data transmission between multiple devices for remote control and data transfer. The control circuit receives and processes status signals from the vehicle and angle and torque signals from the steering system, issuing commands to the drive circuit. The drive circuit primarily drives the MOSFET (Metal-Oxide-Semiconductor) to control and drive the motor rotation.
[0036] Furthermore, the circuit board is designed as a circular structure and is divided into two PCB boards, namely the control PCB board 35 and the drive PCB board 37.
[0037] Furthermore, such as Figure 3 and Figure 4 As shown, the electronic power steering controller 3 includes an electric motor 31 and an electronic drive unit 30 (ECU). The electronic drive unit 30 includes a control PCB board 35, a drive PCB board 37, and a mounting assembly. The mounting assembly includes a mounting bracket 36, power pin headers 360, and signal pin headers 361. The drive PCB board 37 and the control PCB board 35 are mounted parallel to each other on the mounting bracket 36. The signal connection between the drive PCB board 37 and the control PCB board 35 is designed using a pin header scheme. The power pin headers 360, signal pin headers 361, and the plastic bracket are designed as an integral structure.
[0038] Furthermore, the power header 360, signal header 361, and mounting bracket 36 are all integrally molded structures. The integral mounting bracket 36 can be obtained through hybrid injection molding, effectively reducing the number of parts, facilitating assembly, enabling automated assembly, and effectively reducing manufacturing costs. The electronic drive unit 30 includes fasteners, which are used to assemble and fix the PCB board, resulting in a simple and reliable connection structure that is easy to automate.
[0039] This invention divides the circuit board into two PCB boards, which can effectively reduce the radial dimension of the electronic drive unit 30 assembly, making it easier to install on the steering system and providing high adaptability. In addition, the two PCB boards are connected by a pin header, which has a simple connection structure, lower requirements for equipment, and can effectively realize automated assembly.
[0040] For example, the electronic drive unit 30 further includes a connector 32, which is provided with a power interface 322 and a signal interface. The control PCB board 35 is provided with a signal receiving processor. The power interface 322 is connected to the control PCB board 35, and the signal interface is connected to the signal receiving processor.
[0041] Furthermore, such as Figure 2 and Figure 4 As shown, the connector 32 integrates a power interface 322, a CAN signal interface, and a TAS sensor interface. The power interface 322 receives power signals from the vehicle to power the circuit board. The CAN signal interface receives signals such as the vehicle's status and speed, enabling signal interaction with the vehicle. The TAS sensor interface primarily receives the torque and direction of rotation transmitted from the vehicle's steering wheel to the input shaft.
[0042] This invention provides a power interface 322 and a signal interface on the electronic drive unit 30, which can receive information such as the vehicle's power supply, vehicle status, steering wheel angle and torque, and transmit the relevant vehicle information to the control circuit. This facilitates the acquisition of the torque and speed required for vehicle steering, and transmits them to the wheels through the steering mechanism of the steering assist system to achieve precise vehicle steering.
[0043] For example, the control PCB board 35 and the drive PCB board 37 are arranged opposite to each other and parallel to each other, the power pin 360 is vertically connected to the control PCB board 35 and the drive PCB board 37, and the signal pin 361 is vertically connected to the control PCB board 35 and the drive PCB board 37.
[0044] For example, both the power header 360 and the signal header 361 include a through-hole and a connector. The through-hole passes through and is fixed to the fixing bracket 36. The connector is located at both ends of the through-hole that pass through the fixing bracket 36. The corresponding positions of the control PCB board 35 and the drive PCB board 37 are provided with insertion holes. The connector is inserted into the insertion holes. Both the control PCB board 35 and the drive PCB board 37 abut against the through-hole.
[0045] For example, the connector includes multiple insertion parts, and the insertion holes on the control PCB board 35 and the drive PCB board 37 each include multiple slots. The multiple insertion parts of the connector are simultaneously inserted into the multiple slots of the insertion hole.
[0046] Furthermore, such as Figure 4As shown, the power interface 322, TAS interface 321, and CAN interface 323 on connector 32 are matched with the corresponding slots on the control PCB board 35 and then fixed by reflow soldering. The control PCB board 35 is assembled with the mounting bracket 36 along direction A and then fixed with screws. The power header pins 360 on the mounting bracket 36 mate with the first slot 350 on the control PCB board 35, and the inter-board signal header pins 361 on the mounting bracket 36 connect to the second slot 351 on the control PCB board 35, and are fixed to the mounting bracket 36 with screws.
[0047] Furthermore, such as Figure 4 As shown, the drive PCB board 37 is assembled with the fixing bracket 36 along direction B and then fixed with screws. The power pins 360 on the fixing bracket 36 mate with the third slot 370 on the drive PCB board 37, and the inter-board signal pins 361 on the fixing bracket 36 connect with the fourth slot 371 on the drive PCB board 37. The pins on the fixing bracket 36 and the drive PCB board 37 are connected by a reflow soldering process.
[0048] In this invention, the control PCB board 35 and the drive PCB board 37 are arranged in parallel, and the power pin header 360 and the signal pin header 361 are arranged vertically between the two PCB boards. By connecting the pin headers, the radial dimension and axial space of the electronic drive unit 30 can be reduced, making the structure of the electronic power steering controller more compact and effectively realizing the miniaturization design of the structure.
[0049] This invention provides through-holes and connectors on both the power header 360 and the signal header 361, which can fix the control PCB board 35 and the drive PCB board 37. Compared with floating connectors and FPC cable connections, this through-hole soldering method for fixing to the PCB board provides a more reliable connection structure, is easier to assemble, improves assembly convenience, and reduces assembly costs.
[0050] This invention enables the rapid and precise assembly of the control PCB board 35 and the drive PCB board 37 by setting corresponding slots on the control PCB board 35 and the drive PCB board 37, which is beneficial for achieving automated assembly and improving assembly efficiency.
[0051] For example, a heat dissipation boss is provided on the connection end face of the motor 31, and an electrical component is provided on the drive PCB board 37. The drive PCB board 37 is connected to the connection end face, and the electrical component is disposed opposite to the heat dissipation boss.
[0052] For example, a thermally conductive silicone grease layer is applied to the aforementioned heat dissipation protrusion, and the heat dissipation protrusion contacts the electrical component disposed opposite to it through the thermally conductive silicone grease layer.
[0053] Furthermore, the tail end face of the motor 31 is provided with heat dissipation structures, namely the first heat dissipation structure 3131 and the second heat dissipation structure 3132, namely the heat dissipation bosses mentioned above. The electronic drive unit 30 is provided with corresponding electrical components, including some high-power heat-generating components. These components are close to the drive board on the side of the motor 31. These high-power heat-generating components are matched with the heat dissipation areas 3131 and 3132 of the motor 31, and appropriate assembly gaps are reserved.
[0054] Furthermore, a thermally conductive silicone grease layer is also provided on the aforementioned heat dissipation protrusion. By applying thermally conductive silicone grease 39 to the heat dissipation protrusion, the aforementioned thermally conductive silicone grease layer can be obtained. When the electrical components generate heat during operation, the generated heat can be effectively transferred to the motor 31 and the external environment, thereby achieving the heat dissipation effect.
[0055] Furthermore, the electronic drive unit 30 assembly is designed with a modular structure, enabling rapid assembly with the motor 31. For heat-generating components in the electronic drive unit 30, heat can be transferred to the heat dissipation protrusions of the motor 31 via a heat dissipation structure on the motor 31, specifically through thermal grease 39. Compared to thermal pads, thermal grease 39 offers greater flexibility, allowing for a smaller heat dissipation gap between the motor 31 and the electronic drive unit 30, resulting in better thermal conductivity. Heat dissipation components are arranged on the drive board near the motor side of the electronic drive unit 30 assembly. In addition to arranging heat dissipation components on the drive board near the motor side, a heat sink can be added to the PCB board, increasing the heat dissipation area of the circuit board and the motor 31, further improving heat dissipation performance.
[0056] This invention provides a heat dissipation protrusion on the connection end face of the motor 31. When electrical components generate heat, the heat dissipation protrusion can effectively dissipate heat, thereby improving heat dissipation performance.
[0057] This invention increases the heat dissipation area on the electronic drive unit 30 by setting a thermally conductive silicone grease layer, which can effectively transfer the heat generated in the electronic drive unit 30 to the motor 31 and the external environment, greatly improving the heat dissipation performance. Moreover, compared with other heat conduction methods such as electric heating pads, thermally conductive silicone grease is more flexible and can adapt to irregular heat dissipation surfaces, making the PCB layout more flexible.
[0058] For example, the above-mentioned electronic power steering controller 3 also includes a housing 33, which is snapped together with the above-mentioned motor 31 to form a receiving space, the above-mentioned electronic drive unit 30 is housed in the receiving space, and the above-mentioned power interface 322 and the above-mentioned signal interface extend from the end face of the above-mentioned housing 33 away from the above-mentioned motor 31.
[0059] Furthermore, such as Figure 2 As shown, the electronic power steering controller 3 also includes an electronic drive unit housing 33, a waterproof and breathable valve 34, and screws, etc. The shape of the motor 31 is a cylindrical structure composed of an aluminum alloy housing, etc. The shape of the electronic drive unit housing 33 matches that of the motor housing 317, and it is also cylindrical. The electronic drive unit housing 33 is made of PBT+GF material with excellent mechanical and electrical properties.
[0060] Furthermore, such as Figure 2 , Figure 6 and Figure 7 As shown, the electronic drive unit 30 housing is provided with a first buckle 330, and the motor 31 housing is provided with a second buckle 311. The first buckle 300 and the second buckle 311 are fastened together for fixation. The circumferential rib 331 on the electronic drive unit 30 housing cooperates with the end face groove 315 of the motor 31, which can restrict the movement of the electronic drive unit 30 housing. Sealant is applied to the end face groove 315 of the motor 31, which can fill the gap between the electronic drive unit housing 33 and the motor 31 during assembly, providing both sealing and fixation. Furthermore, the electronic drive unit housing 33 is also provided with an electronic drive unit housing groove 332, which can be used for automated identification installation on the production line. The waterproof and breathable valve 34 is directly pressed onto the electronic drive unit housing 33 for fixation.
[0061] Furthermore, the electronic drive unit 30 and the tail of the motor 31 are fixed with screw fasteners. The fit between the housing of the electronic drive unit 30 and the stop of the motor 31 is sealed with sealant. The gap between the housing of the electronic drive unit 30 and the stop of the connector 32 is sealed with sealant. In addition, the waterproof and breathable valve 34 is installed on the housing of the electronic drive unit 30, which can not only balance the internal and external pressure difference of the electronic power steering controller 3, but also play a waterproof role.
[0062] This invention fixes the electronic drive unit housing 33 by setting a buckle on the housing 33 that matches the motor, and sets a waterproof and breathable valve 34 to balance the pressure difference between the inside and outside and to play a waterproof role.
[0063] Furthermore, the motor 31 adopts a three-phase brushless DC permanent magnet synchronous motor. The fisheye terminal 38 on the drive PCB board 37 on the electronic drive unit 30 is matched with the three-phase PIN 312 (3121, 3122, 3123) of the motor, and the fisheye terminal 38 and the three-phase PIN 312 of the motor are fixed by welding process.
[0064] Furthermore, the electronic drive unit 30 is guided and positioned by the motor positioning post and fixed to the BOSS post 314 at the tail of the motor by screws.
[0065] Furthermore, the aforementioned electronic power steering controller 3 adopts a modular design, which can be replaced according to redundancy and non-redundancy, depending on the different torque requirements of the motor 31, so as to match different needs and be easy to adapt to different vehicle models. Among them, the electronic drive unit housing 33 and the waterproof and breathable valve 34 can be integrated into an injection molded unit.
[0066] Furthermore, the entire product adopts integrated technology and modular design. Only the connectors on the motor 31 and connector 32 need to be updated to match different application requirements, greatly improving the product's adaptability. The connection of the electronic drive unit housing 33 is fixed with snaps and sealant instead of conventional screws and sealant, which simplifies the structure and makes assembly faster and more precise, which is conducive to achieving automated assembly. In addition, plastic can be used instead of metal, which can effectively reduce material costs and mold costs. Under the premise of ensuring product functionality, high-performance engineering materials can be selected, which can effectively reduce the weight of the overall product.
[0067] This invention employs a double-layer PCB design, with an integrated support component connecting the two PCBs. This simple, integrated structure effectively reduces the number of parts, facilitates automated assembly, and lowers assembly costs. Furthermore, the pin header connection between the two PCBs provides a simpler and more reliable connection structure, effectively reducing the radial dimension and axial space of the electronic drive unit 30, resulting in a more compact electronic power steering controller 3 and achieving miniaturization. In addition, the electronic components of the electronic drive unit 30 are rationally arranged, and a heat dissipation structure is provided. Thermal grease 39 is used to transfer the heat generated by the electronic components, improving heat dissipation performance. Moreover, the thermal grease 39 can adapt to irregular heat dissipation surfaces, making the PCB layout more flexible.
[0068] In one exemplary embodiment, the present invention also provides an electronic power steering system 1, which includes an electronic power steering controller 3 as described above.
[0069] Furthermore, such as Figure 1 As shown, the aforementioned electronic power steering system 1 is used to achieve power steering for the front wheels of a vehicle. The electric power steering system 1 includes an input shaft 2 connected to the steering wheel; a cylindrical pin and a gear shaft assembly are provided at the lower end of the input shaft 2, wherein the gear shaft assembly meshes with a rack assembly inside a large housing assembly 7. Inner and outer ball joint assemblies 4 for steering the front wheels are connected to both ends of the rack assembly, which is covered by the large housing 7. A rubber dust cover 5 is provided between the large housing 7 and the inner and outer ball joint assemblies 4.
[0070] Furthermore, a torque sensor is installed inside the sensor housing 6 to sense the torque and direction applied to the input shaft 2 by the steering wheel. The electronic power steering controller 3 receives the steering assist torque applied to the input shaft 2 when the steering wheel is turned, as well as signals from vehicle status, etc. The output shaft of the power steering motor 31 is controlled to rotate to generate torque through the internal control strategy of the electronic drive unit 30. The small pulley 310 on the motor output shaft and the large pulley inside the small housing 8 transmit steering assistance to the rack assembly through belt engagement. The electronic power steering controller 3 includes the motor 31, the electronic drive unit 30, etc. The motor 31 of the electronic power steering controller 3 is connected to the small housing 8 by bolts 9 at the three bolt through holes 316 on the end cover on the motor output shaft side.
[0071] In an exemplary embodiment, the present invention also provides a working principle of an electronic power steering controller 3. The connector 32 on the electronic power steering controller 3 can receive information such as the vehicle's power supply, status, steering wheel angle and torque, and transmit the relevant vehicle information to the control PCB board 35. The control circuit control software processes and generates the control signals required for vehicle steering to the drive PCB board 37. The drive chip on the drive PCB board 37 drives the MOS transistor to drive the motor 31 to work and generate the torque and speed required for vehicle steering. These are transmitted to the vehicle's wheels through the steering mechanism in the electronic power steering system 1, thereby achieving precise vehicle steering.
[0072] The beneficial effects of this utility model are:
[0073] This invention relates to an electronic power steering controller comprising a motor and an electronic drive unit. The electronic drive unit includes a control PCB board, a drive PCB board, and a fixing component. The control PCB board and the drive PCB board are connected via the fixing component. The drive PCB board is connected to the motor and drives the motor. The fixing component includes a fixing bracket, power pin headers, and signal pin headers. The fixing bracket is positioned between the control PCB board and the drive PCB board, and the power pin headers and signal pin headers are mounted on the fixing bracket. The power pin headers and signal pin headers pass through both ends of the fixing bracket and are respectively connected to the control PCB board and the drive PCB board. This invention connects the two PCB boards using pin headers, making the structure of the electronic power steering controller simpler and more compact, easier to assemble, and easier to automate, effectively reducing assembly costs. The use of a thermally conductive silicone grease layer to transfer heat effectively increases the heat dissipation area and improves heat dissipation performance.
[0074] The above description is a preferred embodiment of the present utility model, and the technical solution of the present utility model has been further described in detail. It is not intended to limit the protection scope of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also considered to be within the protection scope of the present utility model.
Claims
1. An electronic power steering controller (3), characterized in that, The electronic power steering controller (3) includes a motor (31) and an electronic drive unit (30). The electronic drive unit (30) includes a control PCB board (35), a drive PCB board (37), and a fixing component. The control PCB board (35) and the drive PCB board (37) are connected through the fixing component. The drive PCB board (37) is connected to the motor (31) and drives the motor (31) to run. The fixing component includes a fixing bracket (36), a power pin header (360), and a signal pin header (361); the fixing bracket (36) is disposed between the control PCB board (35) and the drive PCB board (37), and the power pin header (360) and the signal pin header (361) are disposed on the fixing bracket (36); the power pin header (360) and the signal pin header (361) pass through the two ends of the fixing bracket (36) and are respectively connected to the control PCB board (35) and the drive PCB board (37).
2. The electronic power steering controller (3) according to claim 1, characterized in that, The power header (360), the signal header (361), and the fixing bracket (36) are integrally formed. The electronic drive unit (30) also includes fasteners. Fastening holes are provided on both the control PCB board (35) and the drive PCB board (37). The fasteners pass through the fastening holes on the control PCB board (35) and the drive PCB board (37) respectively, and the fasteners are fixedly connected to the fixed bracket (36).
3. The electronic power steering controller (3) according to claim 1, characterized in that, The control PCB board (35) and the drive PCB board (37) are arranged opposite to each other and parallel to each other. The power pin header (360) is vertically connected to the control PCB board (35) and the drive PCB board (37). The signal pin header (361) is vertically connected to the control PCB board (35) and the drive PCB board (37).
4. The electronic power steering controller (3) according to claim 3, characterized in that, Both the power header (360) and the signal header (361) include a through-hole and a connector. The through-hole passes through and is fixed to the fixed bracket (36). The connector is located at both ends of the through-hole that pass through the fixed bracket (36). The control PCB (35) and the drive PCB (37) have corresponding insertion holes. The connector is inserted into the insertion holes, and both the control PCB (35) and the drive PCB (37) abut against the through-hole.
5. The electronic power steering controller (3) according to claim 4, characterized in that, The connector includes multiple insertion parts, and the insertion holes on the control PCB board (35) and the drive PCB board (37) each include multiple slots. The multiple insertion parts of the connector are simultaneously inserted into the multiple slots of the insertion hole.
6. The electronic power steering controller (3) according to claim 1, characterized in that, A heat dissipation boss is provided on the connection end face of the motor (31), and an electrical component is provided on the drive PCB board (37). The drive PCB board (37) is connected to the connection end face, and the electrical component is arranged opposite to the heat dissipation boss.
7. The electronic power steering controller (3) according to claim 6, characterized in that, A thermally conductive silicone grease layer is applied to the heat dissipation protrusion, and the heat dissipation protrusion contacts the electrical component disposed opposite to it through the thermally conductive silicone grease layer.
8. The electronic power steering controller (3) according to claim 1, characterized in that, The electronic drive unit (30) also includes a connector (32), which is provided with a power interface (322) and a signal interface. The control PCB board (35) is provided with a signal receiving processor. The power interface (322) is connected to the control PCB board (35), and the signal interface is connected to the signal receiving processor.
9. The electronic power steering controller (3) according to claim 8, characterized in that, The electronic power steering controller (3) also includes a housing (33), which is snapped into the motor (31) to form a receiving space. The electronic drive unit (30) is housed in the receiving space. The power interface (322) and the signal interface extend from the end face of the housing (33) away from the motor (31).
10. An electronic power steering system, characterized in that, It includes the electronic power steering controller (3) as described in any one of claims 1-9.