Fully redundant coil structure of angle sensor
By adopting a receiving coil design with semicircular windings and diamond windings in the angle sensor, the problems of insufficient PCB board space and excessive induced voltage in a fully redundant design are solved. This achieves efficient and reasonable coil layout and electrical system stability, avoiding additional cost increases.
Patent Information
- Application Number
- CN202510989103.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2025-09-16
AI Technical Summary
The fully redundant angle sensor has problems such as PCB board space limitations, insufficient coil layout, and excessive induced voltage in the receiving coil.
The receiving coil adopts a semicircular winding form. Two sets of identical receiving coils and chips are arranged on the same layer of PCB board, printed as two layers of diamond windings, and the three-phase windings are connected in a star shape.
The coil layout space is reduced, the induced voltage amplitude is lowered, the stability of the electrical system is maintained, the number of PCB board layers and the difficulty of software algorithms are not increased, and the manufacturing cost is reduced.
Smart Images
Figure CN120656812A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an automobile steering system, and in particular to a coil structure of a fully redundant TAS angle sensor in the automobile steering system. Background Art
[0002] As a core component in an automotive electric power steering system, the angle sensor transmits steering wheel angle and torque signals to the ECU control chip. The TAS angle sensor is a built-in angle sensor that provides absolute angle information. Its key feature is that it maintains absolute angle information even when the KL30 is powered off, ensuring accurate steering wheel angle measurement.
[0003] With the continuous development of the "new four modernizations" of automobiles, more and more electrical units are being used. In order to ensure the stability of the electrical system, many angle sensors on the market adopt a fully redundant design. This fully redundant design has the following problems:
[0004] First, the fully redundant structure adds a set of excitation coils, which doubles the transmission power. This causes the induced voltage on the receiving coil to easily exceed the chip's receiving capability.
[0005] Second, due to limited PCB space, the two receiving coils had to be arranged on different layers. This resulted in significant differences in the induced voltage amplitudes on the two coils, increasing the complexity of the software algorithm.
[0006] Third, the fully redundant design increases the number of layers of the PCB board, which will inevitably lead to a more compact space on the PCB board and increase the manufacturing cost of the product. Summary of the Invention
[0007] The technical problem to be solved by the present invention is to provide a fully redundant coil structure for an angle sensor, which can solve the problems faced by the fully redundant design of the angle sensor, such as PCB board space limitations, insufficient coil layout space, and excessive induced voltage in the receiving coil.
[0008] In order to solve the above problem, the present invention provides a fully redundant coil structure of an angle sensor, wherein the receiving coil is in a semicircular winding form.
[0009] Furthermore, the fully redundant coil structure has two sets of identical receiving coils and chips.
[0010] Furthermore, each set of receiving coils is composed of two groups of receiving coils, and each group of receiving coils is composed of three-phase windings connected in a star shape.
[0011] Furthermore, each phase winding has a semicircular structure.
[0012] Furthermore, the two sets of receiving coils of the fully redundant coil structure are arranged on the same layer.
[0013] Furthermore, the receiving coil is printed on the PCB board in the form of a diamond-shaped winding with two layers.
[0014] Compared with the prior art, the present invention can produce the following technical effects:
[0015] First, for the TAS angle sensor with a fully redundant design, the present invention changes the traditional full-circle winding layout to a semicircular winding layout. This semicircular winding can reduce the layout space of the coil by half, freeing up space on the PCB board, so that all windings can be arranged on the same layer, making the coil routing more reasonable and efficient.
[0016] Secondly, the receiving coil in the form of a semicircular winding adopted in the present invention reduces the receiving area by half, which can effectively reduce the amplitude of the induced voltage, thereby keeping the induced voltage within the receiving range of the chip with a fully redundant design.
[0017] Third, the present invention utilizes a receiving coil in the form of a semicircular winding so that two sets of receiving coils of a fully redundant coil structure can be arranged on the same layer. While ensuring the stability of the electrical system, it does not increase the number of layers of the PCB board, nor does it increase the difficulty of the software algorithm and the manufacturing cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of a set of receiving coils in the fully redundant coil structure of the present invention;
[0019] Figure 2 A schematic diagram of a signal of a simulated induced voltage of an existing full-circle receiving coil;
[0020] Figure 3 FIG. 4 is a schematic diagram of a simulated induced voltage signal of a semicircular receiving coil of the present invention. DETAILED DESCRIPTION
[0021] The following describes the embodiments of the present invention through specific embodiments in conjunction with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be based on different viewpoints and applications. Those skilled in the art can make various similar generalizations and substitutions without departing from the spirit of the present invention.
[0022] The fully redundant coil structure of the angle sensor of the present invention is as follows: Figure 1As shown, the receiving coil in the fully redundant coil structure adopts a semicircular winding pattern. This invention, for fully redundant TAS angle sensors, replaces the traditional full-circle winding layout with a semicircular one. This semicircular winding pattern reduces the coil layout space by half, freeing up space on the PCB. This allows all redundant windings to be arranged on the same layer, making coil routing more rational and efficient.
[0023] In the present invention, the fully redundant coil structure has two identical sets of receiving coils and chips, where each set of receiving coils occupies only half the space of a traditional circular coil on the PCB board. This allows both sets of receiving coils to be arranged on the same layer of the PCB board. This ensures the stability and reliability of the electrical system without increasing the number of PCB board layers, the difficulty of the software algorithm, and the manufacturing cost of the product.
[0024] In a fully redundant coil structure, each receiving coil set consists of two groups of receiving coils, each of which consists of three-phase windings connected in a star pattern. Each phase winding is a semicircular structure, occupying only half of the circumference, allowing all 12 phase windings to be arranged on the same layer.
[0025] The two sets of receiving coils of the fully redundant coil structure are arranged on the same layer.
[0026] The receiving coil is printed on both sides of the PCB board in the form of upper and lower layers of diamond-shaped windings.
[0027] In order to make the technical means, innovative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.
[0028] Specifically, Figure 2 The figure shows the simulated induced voltage of the entire circumference receiving coil. Figure 3 Table 1 shows the simulated induced voltage of the semicircular receiving coil of the present invention. The simulation results demonstrate that the optimized receiving coil structure produces a lower induced voltage signal output. The voltage receiving range of the chip in the fully redundant coil structure is 40 to 100 mV, and the optimized induced voltage output falls well within this range, not exceeding the chip's receiving capacity. Therefore, by adjusting the receiving coil layout from a full-circular to a semicircular layout, the present invention effectively reduces the induced voltage amplitude of the receiving coil.
[0029] Table 1 Comparison of simulated induced voltages of full-circle receiving coil and half-circle receiving coil
[0030]
[0031] The present invention has been described in detail above through specific embodiments. The above embodiments are merely preferred embodiments of the present invention and the present invention is not limited to the above embodiments. Without departing from the principles of the present invention, equivalent substitutions and improvements made by those skilled in the art should be considered within the technical scope protected by the present invention.
Claims
1. A fully redundant coil structure of an angle sensor, characterized in that: The receiving coil in the fully redundant coil structure is in a semicircular winding form.
2. The fully redundant coil structure of the angle sensor according to claim 1, characterized in that: The fully redundant coil structure has two sets of identical receiving coils and chips.
3. The fully redundant coil structure of the angle sensor according to claim 2, characterized in that: Each set of receiving coils consists of two groups of receiving coils, and each group of receiving coils is composed of three-phase windings connected in star shape.
4. The fully redundant coil structure of the angle sensor according to claim 3, characterized in that: Each phase winding has a semicircular structure.
5. The fully redundant coil structure of the angle sensor according to claim 3, characterized in that: The two sets of receiving coils of the fully redundant coil structure are arranged on the same layer.
6. The fully redundant coil structure of the angle sensor according to claim 3, characterized in that: The receiving coil is printed on the PCB board in the form of upper and lower layers of diamond-shaped windings.