CN115675629A - Electric power steering device - Google Patents
Electric power steering device Download PDFInfo
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- CN115675629A CN115675629A CN202211444680.7A CN202211444680A CN115675629A CN 115675629 A CN115675629 A CN 115675629A CN 202211444680 A CN202211444680 A CN 202211444680A CN 115675629 A CN115675629 A CN 115675629A
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Abstract
The invention discloses an electric power steering device, which relates to the technical field of power steering and comprises a motor, a shell, a control circuit board assembly, a driving circuit board assembly and PCBs (printed circuit boards), wherein the PCBs comprise an upper PCB, a middle flexible PCB and a lower PCB; a first device unit mounted on the upper PCB to form the first control circuit board assembly; the second device unit is arranged on the upper PCB to form the second control circuit board assembly; a third device unit mounted on the lower PCB to form the first driving circuit board assembly; and a fourth device unit mounted on the lower PCB to form the second driving circuit board assembly. The second control circuit board assembly is redundant to the first control circuit board assembly and the second drive circuit board assembly is redundant to the first drive circuit board assembly. According to the invention, the control circuit board assembly and the driving circuit board assembly are arranged in a stacked manner, so that the circumferential size of the electric power assisting device can be effectively reduced, the structure is compact, and the whole vehicle is convenient to mount.
Description
Technical Field
The invention relates to the technical field of steering controllers, in particular to an electric power steering device.
Background
The EPS system can provide steering power for a vehicle by means of a motor, the traditional EPS system mainly comprises the motor, a controller, a shell and the like, the EPS utilizes a sensor to collect running data of the vehicle, determines a target torque required by the vehicle at present, and controls the motor of the vehicle to provide output power of the required target torque for the vehicle.
The controller generally comprises a control circuit board assembly and a driving circuit board assembly. The driving circuit board assembly in the controller of the component with the highest failure rate in the electric power steering device is directly designed redundantly in the traditional scheme, so that the size of the electric power steering device is too large, and the whole vehicle arrangement is not facilitated.
In chinese patent application No.: CN 20182096983.4 discloses an electric power steering control system, which includes: the power assisting device comprises a first signal acquisition module, a second signal acquisition module, a first control module, a second control module, a first driving circuit module, a second driving circuit module and a double-winding power assisting motor; the first signal acquisition module is connected with the first control module and used for inputting a first acquisition signal for the first control module; the first control module is connected with the first drive circuit module; the first control module is used for calculating power-assisted information according to the first acquisition signal and sending a first control signal to the first drive circuit module according to the power-assisted information; the second signal acquisition module is connected with the second control module and used for inputting a second acquisition signal to the second control module; the second control module is connected with the second driving circuit module; the second control module is used for calculating power-assisted information according to the second acquisition signal and sending a second control signal to the second drive circuit module according to the power-assisted information; the two driving circuit modules are respectively connected with the double-winding power-assisted motor and are respectively used for two windings of the motor. The technical scheme carries out redundancy design, and causes the steering device to be overlarge in size. In view of this, the present application is proposed.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electric power steering device aiming at the defects of the background art, wherein the control circuit board assembly and the driving circuit board assembly are arranged in a stacked mode, so that the circumferential size of the electric power steering device can be effectively reduced, the structure is compact, and the whole vehicle is convenient to install.
The invention adopts the following technical scheme for solving the technical problems:
an electric power steering device comprises a motor, a controller and a shell, wherein the controller comprises a first control circuit board assembly, a second control circuit board assembly, a first driving circuit board assembly and a second driving circuit board assembly;
the electric power steering apparatus further includes:
the PCB comprises an upper PCB, a middle PCB and a lower PCB;
a first device unit mounted on the upper PCB to form the first control circuit board assembly;
a second device unit mounted on the upper PCB to form the second control circuit board assembly;
a third device unit mounted on the lower PCB to form the first driving circuit board assembly;
a fourth device unit mounted on the lower PCB to form the second driving circuit board assembly;
the first control circuit board assembly, the second control circuit board assembly, the first driving circuit board assembly and the second driving circuit board assembly are arranged in a stacked mode;
the first control circuit board assembly is electrically connected with the first driving circuit board assembly, and the second control circuit board assembly is electrically connected with the second driving circuit board assembly;
the second control circuit board assembly is redundant of the first control circuit board assembly, and the second driving circuit board assembly is redundant of the first driving circuit board assembly.
As a further preferable aspect of the electric power steering apparatus of the present invention, the first device unit and the second device unit each include, but are not limited to, a microprocessor, a power circuit; the third device unit and the fourth device unit respectively comprise but are not limited to a drive axle of the motor, a drive circuit of the drive axle of the motor, a power device and a rotor position sensor of the motor.
As a further preferable scheme of the electric power steering apparatus of the present invention, the PCB includes an intermediate PCB, and the intermediate PCB is a flexible PCB or a semi-flexible PCB; the middle PCB is bent and then arranged in a stacked mode, a first device unit, a second device unit and a third device unit are installed in corresponding areas on the PCB, and a first control circuit board assembly, a second control circuit board assembly, a first driving circuit board assembly and a second driving circuit board assembly are formed by the fourth device unit respectively;
as a further preferable scheme of the electric power steering apparatus of the present invention, a notch is provided on the upper PCB; the electric power steering apparatus further includes:
the first connecting piece and the second connecting piece are used for being electrically connected with an external power supply, one end of the first connecting piece penetrates through the notch to be electrically connected with the first driving circuit board assembly, and one end of the second connecting piece penetrates through the notch to be electrically connected with the second driving circuit board assembly; the first connecting piece and the second connecting piece, and the first driving circuit board assembly and the second driving circuit board assembly are respectively fixed on the motor end cover.
As a further preferable aspect of the electric power steering apparatus of the present invention, the first control circuit board assembly and the second control circuit board assembly are located above the first drive circuit board assembly and the second drive circuit board assembly, and the heat generating devices on the bottom surfaces of the first drive circuit board assembly and the second drive circuit board assembly are connected to the motor end cover through a heat dissipating material.
As a further preferable aspect of the electric power steering apparatus of the present invention, the motor is a 6K-phase motor, where K is a positive integer; the number of drive bridges contained in the first drive circuit board assembly and the second drive circuit board assembly is equal to the number of phases of the motor.
As a further preferable aspect of the electric power steering apparatus of the present invention, motor phase lead-out wires of the motors are arranged horizontally in parallel.
In a further preferred embodiment of the electric power steering apparatus of the present invention, the first control circuit board assembly and the second control circuit board assembly are mounted on a projection of the motor.
As a further preferable aspect of the electric power steering apparatus of the present invention, magnets are assembled at a central position of a rotor of the motor near the first driving circuit board assembly and the second driving circuit board assembly, and the first driving circuit board assembly and the second driving circuit board assembly are respectively provided with corresponding angle decoding chips.
Compared with the prior art, the technical scheme adopted by the invention has the following technical effects:
1. the invention discloses an electric power steering device, which comprises a motor, a controller and a shell, wherein the controller comprises a first control circuit board assembly, a second control circuit board assembly, a first driving circuit board assembly and a second driving circuit board assembly, and the first control circuit board assembly, the second control circuit board assembly, the first driving circuit board assembly and the second driving circuit board assembly are arranged in a stacked mode; the first control circuit board assembly is electrically connected with the first driving circuit board assembly, and the second control circuit board assembly is electrically connected with the second driving circuit board assembly; the second control circuit board assembly is the redundancy of the first control circuit board assembly, the second driving circuit board assembly is the redundancy of the first driving circuit board assembly, and the control circuit board assembly and the driving circuit board assemblies are arranged in a stacked mode, so that the circumferential size of the electric power assisting device can be effectively reduced, the structure is compact, and the whole vehicle is convenient to mount;
2. according to the invention, a larger-size PCB is utilized and comprises a flexible PCB or a semi-flexible PCB, a first device unit, a second device unit and a third device unit are arranged in corresponding areas on the PCB, a fourth device unit respectively forms a first control circuit board assembly, a second control circuit board assembly, a first driving circuit board assembly and a second driving circuit board assembly, then the PCB is bent, the first control circuit board assembly, the second control circuit board assembly, the first driving circuit board assembly and the second driving circuit board assembly are arranged in a stacked mode, and the circumferential size of the whole device is effectively reduced;
3. according to the invention, the first control circuit board assembly, the second control circuit board assembly, the first driving circuit board assembly and the second driving circuit board assembly are manufactured by using one PCB, the electric continuity is realized by using the internal circuit of the PCB, the first control circuit board assembly is electrically connected with the first driving circuit board assembly without additional welding, and the second control circuit board assembly is electrically connected with the second driving circuit board assembly, so that the problems of poor welding, device damage and the like caused by welding are effectively avoided;
4. the upper PCB is provided with a notch, and a first connecting piece and a second connecting piece which can conduct electricity are arranged on the upper PCB, the first connecting piece and the second connecting piece are used for being electrically connected with an external power supply, one end of the first connecting piece penetrates through the notch to be electrically connected with a first driving circuit board assembly, and one end of the second connecting piece penetrates through the notch to be electrically connected with a second driving circuit board assembly; the first connecting piece, the second connecting piece, the first driving circuit board assembly and the second driving circuit board assembly are respectively fixed on the motor end cover, so that the requirement of the whole vehicle on the wiring harness plugging force is met, a notch is formed, the connecting piece is arranged on the inner side of the notch, and the circumferential size of the whole device is reduced;
5. the first control circuit board assembly and the second control circuit board assembly are positioned above the first driving circuit board assembly and the second driving circuit board assembly, and the heating devices on the bottom surfaces of the first driving circuit board assembly and the second driving circuit board assembly are connected with the motor end cover through heat dissipation materials, so that heat dissipation is facilitated;
6. the number of drive bridges contained in the first drive circuit board assembly and the second drive circuit board assembly is equal to the number of phases of the motor, three-phase outgoing lines are commonly designed for a common brushless motor, and 6 phases are redundant designs of three phases, so that safe use is guaranteed; the motor 6 phase leading-out wires of the motor are horizontally arranged in parallel, so that the production is convenient.
Drawings
FIG. 1 is a schematic diagram of an assembly structure of an electric power steering apparatus according to the present invention;
FIG. 2 is an expanded front view of the PCB of the present invention;
FIG. 3 is a rear side expanded view of the PCB of the present invention;
fig. 4 is an assembly view of the PCB board of the present invention.
The numbers in the figures are specified below:
1-motor, 2-controller, 3-shell, 20-PCB, 201-upper PCB, 202-lower PCB, 203-middle PCB, 2011-first device unit, 2012-second device unit, 2021-third device unit, 2012-fourth device unit, 21-first control circuit board assembly, 22-second control circuit board assembly, 23-first drive circuit board assembly, 24-second drive circuit board assembly, 251-first connecting piece, and 252-second connecting piece.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present application may be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Application overview:
in the prior art, a control circuit board assembly and a driving circuit board assembly are formed by utilizing two PCBs and installing corresponding devices, and the control circuit board assembly and the driving circuit board assembly are tiled and arranged in a plane. This results in a large circumferential dimension of the entire apparatus. Meanwhile, the control circuit board assembly and the driving circuit board assembly are electrically connected by welding. The high temperatures of such soldering have a small probability of causing damage to the semiconductor device; the welding spots are in poor welding risk; the welded joint stress may fail due to vibration. In view of this, the applicant proposes the following improvements:
as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the electric power steering apparatus provided by the present invention includes a motor 1, a controller 2 and a housing 3, wherein the controller 2 includes a first control circuit board assembly 21, a second control circuit board assembly 22, a first driving circuit board assembly 23 and a second driving circuit board assembly 24; the device also includes:
the PCB 20 comprises an upper PCB 201, a middle PCB 203 and a lower PCB 202, wherein the PCB 203 is a flexible PCB or a semi-flexible PCB; the PCB 203 is folded and then arranged in a stacking manner;
a first device unit 2011 mounted on the upper PCB 201 to form the first control circuit board assembly 21;
a second device unit 2012 mounted on the upper PCB 201 to form the second control circuit board assembly 22;
and a third device unit 2021 mounted on the lower PCB 202 to form the first driving circuit board assembly 23.
And a fourth device unit 2012 mounted on the lower PCB 202 to form the second driving circuit board assembly 24.
The second control circuit board assembly 22 is redundant of the first control circuit board assembly 21, and the second drive circuit board assembly 24 is redundant of the first drive circuit board assembly 23.
The first device unit 2011 includes, but is not limited to, a microprocessor, a power circuit; second device unit 2012 includes, but is not limited to, a microprocessor, power supply circuitry; the third device unit 2021 includes, but is not limited to, a motor 1 drive axle, a drive circuit of the motor 1 drive axle, a power device, and a motor 1 rotor position sensor; the fourth device unit 2022 includes, but is not limited to, a motor 1 drive axle, a drive circuit of the motor 1 drive axle, a power device, and a motor 1 rotor position sensor. The number and types of the first device unit 2011, the second device unit 2012, the third device unit 2021 and the fourth device unit 2022, and the installation and connection relationship with the PCB 20 may be implemented by using the conventional technology.
In the present application, a larger-sized PCB 20 is utilized, and includes a flexible PCB 203 or a semi-flexible PCB 203, a first device unit 2011, a second device unit 2012 and a third device unit 2021 are mounted in corresponding regions on the PCB 20, and a fourth device unit 2022 forms a first control circuit board assembly 21, a second control circuit board assembly 22, a first driving circuit board assembly 23 and a second driving circuit board assembly 24, respectively. And then bending the PCB 203 to arrange the first control circuit board assembly 21, the second control circuit board assembly 22, the first driving circuit board assembly 23 and the second driving circuit board assembly 24 in a stacked manner. Thus effectively reducing the circumferential size of the whole device.
Because the first control circuit board assembly 21, the second control circuit board assembly 22, the first driving circuit board assembly 23 and the second driving circuit board assembly 24 are made of one PCB 20, the internal circuit of the PCB 20 is utilized to realize electric continuity, no additional welding is needed to realize the electric connection of the first control circuit board assembly 21 and the first driving circuit board assembly 23, and the second control circuit board assembly 22 and the second driving circuit board assembly 24 are electrically connected, thereby avoiding the problems of poor welding, device damage and the like caused by welding.
The embodiment has the advantages of low functional failure rate, compact structure and easy assembly.
A gap is arranged on the upper PCB 201; the device also includes:
two conductive first connecting pieces 251 and second connecting pieces 252, wherein the first connecting pieces 251 and the second connecting pieces 252 are used for being electrically connected with an external power supply, one end of each first connecting piece 251 passes through the notch to be electrically connected with the first driving circuit board assembly 23, and one end of each second connecting piece 252 passes through the notch to be electrically connected with the second driving circuit board assembly 24; the first connecting piece 251 and the second connecting piece 252, the first driving circuit board assembly 23 and the second driving circuit board assembly 24 are respectively fixed on the end cover of the motor 1. The requirement of the whole vehicle on the insertion and extraction force of the wiring harness is met. The notch is arranged, the connecting piece is arranged on the inner side of the notch, and the circumferential size of the whole device is reduced.
The first control circuit board assembly 21 and the second control circuit board assembly 22 are located above the first driving circuit board assembly 23 and the second driving circuit board assembly 24, and the heating devices on the bottom surfaces of the first driving circuit board assembly 23 and the second driving circuit board assembly 24 are connected with the end cover of the motor 1 through heat dissipation materials, so that heat dissipation is facilitated.
The motor 1 is a 6K-phase motor 1, wherein K is a positive integer; the number of drive bridges included in the first drive circuit board assembly 23 and the second drive circuit board assembly 24 is equal to the number of phases of the motor 1. The three-phase outgoing line is commonly designed for a common brushless motor 1, and the 6 phase is a three-phase redundant design, so that safe use is guaranteed.
The motor 1 phase leading-out wires of the motor 1 are horizontally arranged in parallel, so that the production is convenient.
The first control circuit board assembly 21 and the second control circuit board assembly 22 are mounted on the protrusion 101 of the motor 1.
The central position of the rotor of the motor 1 is equipped with magnets near the first driving circuit board assembly 23 and the second driving circuit board assembly 24, and the first driving circuit board assembly 23 and the second driving circuit board assembly 24 are respectively provided with corresponding angle decoding chips.
A vehicle comprises the electric power steering device. The electric power steering device has small circumferential size and is convenient for the whole vehicle to be installed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An electric power steering apparatus characterized in that: the controller comprises a motor (1), a controller (2) and a shell (3), wherein the controller (2) comprises a first control circuit board component (21), a second control circuit board component (22), a first driving circuit board component (23) and a second driving circuit board component (24);
the electric power steering apparatus further includes:
a PCB board (20), wherein the PCB board (20) comprises an upper PCB board (201), a middle PCB board (203) and a lower PCB board (202);
a first device unit (2011) mounted on the upper PCB (201) to form the first control circuit board assembly (21);
a second device unit (2012) mounted on the upper PCB (201) to form the second control circuit board assembly (22);
a third device unit (2021) mounted on the lower PCB (202) to form the first driving circuit board assembly (23);
a fourth device unit (2012) mounted on the lower PCB (202) forming the second driving circuit board assembly (24);
the first control circuit board assembly (21), the second control circuit board assembly (22), the first driving circuit board assembly (23) and the second driving circuit board assembly (24) are arranged in a stacked mode;
the first control circuit board assembly (21) is electrically connected with the first driving circuit board assembly (23), and the second control circuit board assembly (22) is electrically connected with the second driving circuit board assembly (24);
the second control circuit board assembly (22) is redundant to the first control circuit board assembly (21), and the second drive circuit board assembly (24) is redundant to the first drive circuit board assembly (23).
2. An electric power steering apparatus according to claim 1, characterized in that: the first device unit (2011) and the second device unit (2012) each include, but are not limited to, a microprocessor, a power supply circuit; the third device unit (2021) and the fourth device unit (2022) each include, but are not limited to, a drive axle of a motor, a drive circuit of the drive axle of the motor, a power device, and a rotor position sensor of the motor.
3. An electric power steering apparatus according to claim 1, characterized in that: the PCB (20) comprises an intermediate PCB (203), and the intermediate PCB (203) is a flexible PCB or a semi-flexible PCB; the middle PCB (203) is arranged in a stacked mode after being bent, a first device unit (2011), a second device unit (2012) and a third device unit (2021) are mounted in corresponding areas on the PCB (20), and a first control circuit board assembly (21), a second control circuit board assembly (22), a first driving circuit board assembly (23) and a second driving circuit board assembly (24) are formed in the fourth device unit (2022) respectively.
4. An electric power steering apparatus according to claim 1, characterized in that: a notch is arranged on the upper PCB (201); the electric power steering apparatus further includes:
two conductive first connecting pieces (251) and second connecting pieces (252), wherein the first connecting pieces (251) and the second connecting pieces (252) are used for being electrically connected with an external power supply, one end of each first connecting piece (251) penetrates through the notch to be electrically connected with the first driving circuit board assembly (23), and one end of each second connecting piece (252) penetrates through the notch to be electrically connected with the second driving circuit board assembly (24); the first connecting piece (251) and the second connecting piece (252) as well as the first driving circuit board assembly (23) and the second driving circuit board assembly (24) are respectively fixed on the end cover of the motor (1).
5. An electric power steering apparatus according to claim 1, characterized in that: the first control circuit board assembly (21) and the second control circuit board assembly (22) are located above the first driving circuit board assembly (23) and the second driving circuit board assembly (24), and the heating devices on the bottom surfaces of the first driving circuit board assembly (23) and the second driving circuit board assembly (24) are connected with the end cover of the motor (1) through heat dissipation materials.
6. An electric power steering apparatus according to claim 1, characterized in that: the motor (1) is a 6K-phase motor, wherein K is a positive integer; the number of drive bridges contained in the first drive circuit board assembly (23) and the second drive circuit board assembly (24) is equal to the number of phases of the motor (1).
7. An electric power steering apparatus according to claim 1, characterized in that: and motor phase outgoing lines of the motor (1) are horizontally arranged in parallel.
8. An electric power steering apparatus according to claim 1, characterized in that: the first control circuit board assembly (21) and the second control circuit board assembly (22) are mounted on a protrusion (101) of the motor (1).
9. An electric power steering apparatus according to claim 1, characterized in that: the central position of the rotor of the motor (1) is close to the positions of the first driving circuit board assembly (23) and the second driving circuit board assembly (24) and is provided with magnets, and the first driving circuit board assembly (23) and the second driving circuit board assembly (24) are respectively provided with corresponding angle decoding chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211444680.7A CN115675629A (en) | 2022-11-18 | 2022-11-18 | Electric power steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211444680.7A CN115675629A (en) | 2022-11-18 | 2022-11-18 | Electric power steering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115675629A true CN115675629A (en) | 2023-02-03 |
Family
ID=85053033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211444680.7A Pending CN115675629A (en) | 2022-11-18 | 2022-11-18 | Electric power steering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115675629A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082678A1 (en) * | 2022-10-20 | 2024-04-25 | 博世华域转向系统有限公司 | Small-size dual-redundancy electric power steering motor controller structure |
-
2022
- 2022-11-18 CN CN202211444680.7A patent/CN115675629A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082678A1 (en) * | 2022-10-20 | 2024-04-25 | 博世华域转向系统有限公司 | Small-size dual-redundancy electric power steering motor controller structure |
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