Anti-interference electric vehicle hall rotating handle

Abstract

The utility model relates to electric motor car control technical field provides an anti -interference's electric motor car hall handlebar, including handlebar casing, magnetic ring, fixed casing and circuit board, hall element, filter circuit and shielding structure, filter circuit and hall element's signal output end electric connection is used for filtering to hall signal, shielding structure includes the ground shielded cover of covering in the circuit board surface is used for isolating external electromagnetic interference. Through integrating filter and shielding double anti -interference measures in signal source head, the problem that the traditional hall handlebar is susceptible to electromagnetic interference and leads to control misalignment has been solved fundamentally to improve the stability and safety of electric motor car driving.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle control technology, and more specifically, it relates to an anti-interference Hall effect throttle for electric vehicles. Background Technology

[0002] The Hall effect throttle is one of the core control components of an electric vehicle. By rotating the throttle, the driver changes the magnetic field strength of the internal Hall element, thereby outputting a linear voltage signal to the controller to adjust the vehicle's speed.

[0003] However, existing Hall effect throttles generally have poor electromagnetic interference resistance. Electric vehicles operate in complex environments, and components such as motors and controllers can generate strong electromagnetic interference. These interference signals can easily couple to the signal output of the Hall element through wires, causing the controller to receive incorrect speed control signals. This can lead to vehicle shaking, unstable speed, or even sudden acceleration, resulting in a "runaway" phenomenon and posing serious safety hazards.

[0004] Therefore, an anti-interference Hall effect throttle for electric vehicles is proposed to improve the existing problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-interference Hall throttle for electric vehicles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference electric vehicle Hall effect throttle, comprising a throttle housing, a magnetic ring disposed at one end of the throttle housing, and a fixed housing disposed at the end of the magnetic ring away from the throttle housing, a circuit board disposed on one side of the fixed housing, a Hall effect element integrated on the circuit board; a filter circuit and a shielding structure are also integrated on the circuit board; the filter circuit is electrically connected to the signal output terminal of the Hall effect element, and the shielding structure includes a shielding cover covering the surface of the circuit board, the shielding cover being grounded.

[0007] The present invention is further configured such that: the filtering circuit is an RC low-pass filter circuit, including a resistor and a capacitor, the resistor is connected in series at the signal output terminal of the Hall element, one end of the capacitor is connected to the rear end of the resistor, and the other end is grounded.

[0008] The present invention is further configured such that: the shielding cover is a metal cover made of magnetic and conductive material, and completely covers the area where the Hall element and the filter circuit are located.

[0009] The present invention is further configured such that: a grounding pad is provided on the circuit board, and the shielding cover is fixedly connected to the grounding pad by solder to achieve electrical grounding.

[0010] The present invention is further configured such that: the inner wall of the fixed housing has a mounting groove at the position corresponding to the Hall element, and the Hall element is fixedly installed in the mounting groove.

[0011] The present invention is further configured such that the magnetic ring is a sector-shaped magnetic ring with its magnetic poles distributed along the circumference.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] (1) By directly integrating an RC low-pass filter circuit at the signal output terminal of the Hall element, high-frequency noise of the interference signal can be filtered out before it enters the signal transmission line, ensuring the purity of the output signal and reducing the control failure caused by electromagnetic interference.

[0014] (2) By adding a grounded metal shield, the Hall element and the filter circuit can be completely wrapped up to form a Faraday cage, which effectively isolates the radiation interference of electromagnetic waves in the external space and provides double protection for the stability of the signal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the anti-interference Hall throttle for electric vehicles according to this utility model.

[0016] Figure 2 This is an exploded view of the Hall effect throttle of the electric vehicle in this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the fixed shell in this utility model;

[0018] Figure 4 This is a schematic diagram of the circuit board, filter circuit, and Hall element in this utility model;

[0019] Figure 5 This is a circuit block diagram of the present invention.

[0020] Explanation of reference numerals in the attached diagram: 1. Throttle housing; 2. Magnetic ring; 3. Fixing housing; 31. Mounting slot; 4. Circuit board; 5. Hall element; 6. Filter circuit; 61. Resistor; 62. Capacitor; 7. Shielding cover; 8. Grounding pad. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] Please see Figures 1-5 The present invention provides the following technical solution:

[0024] Example 1, see Figures 1-5 An anti-interference electric vehicle Hall effect throttle includes a throttle housing 1, a magnetic ring 2 is provided at one end of the throttle housing 1, and a fixed housing 3 is provided at the end of the magnetic ring 2 away from the throttle housing 1. A circuit board 4 is provided on one side of the fixed housing 3, and a Hall element 5 is integrated on the circuit board 4.

[0025] The circuit board 4 also integrates a filter circuit 6 and a shielding structure; the filter circuit 6 is electrically connected to the signal output terminal of the Hall element 5, and the shielding structure includes a shielding cover 7 covering the surface of the circuit board 4, and the shielding cover 7 is grounded.

[0026] The throttle housing 1 is typically made of injection-molded plastic and has an internal cavity. The magnetic ring 2 is a sector-shaped permanent magnet with its magnetic poles arranged alternately along the circumferential direction (NS). The magnetic ring 2 is mounted on one end side wall of the throttle housing 1 and can rotate synchronously with the rotation of the throttle housing 1.

[0027] The circuit board 4 is fixedly mounted on one side of the fixed housing 3 by clips or screws, so that the position of the Hall element 5 integrated on the circuit board 4 is opposite to the magnetic ring 2 through the mounting groove 31, so that when the magnetic ring 2 rotates, the magnetic field strength on its surface can act on the Hall element 5 and the circuit board 4.

[0028] See Figures 1-5 Furthermore, the filter circuit 6 is an RC low-pass filter circuit, including a resistor 61 and a capacitor 62. The resistor 61 is connected in series with the signal output terminal of the Hall element 5, and one end of the capacitor 62 is connected to the rear end of the resistor 61, while the other end is grounded.

[0029] The circuit board 4 integrates the core functional components: Hall element 5, filter circuit 6, and shielding cover 7; Hall element 5 is used to sense changes in the magnetic field of magnetic ring 2 and output corresponding voltage signals.

[0030] The filter circuit 6 adopts a classic RC low-pass filter circuit, which consists of a resistor 61 and a capacitor 62. The resistor 61 is connected in series with the signal output terminal of the Hall element 5, and one end of the capacitor 62 is connected to the connection point between the rear end of the resistor 61 and the output wire, while the other end is grounded.

[0031] It should be noted that the cutoff frequency of filter circuit 6 can be designed according to the common interference frequencies of electric vehicles, such as being set in the range of tens of hertz to hundreds of hertz, so as to effectively filter out high-frequency interference noise.

[0032] See Figures 1-5Furthermore, the shield 7 is a metal shield made of magnetic and conductive material, and completely covers the area where the Hall element 5 and the filter circuit 6 are located.

[0033] The shielding cover 7 is made of thin iron sheet or copper foil and other metal materials with good magnetic and electrical conductivity. Its shape is adapted to the circuit board 4 and completely covers the Hall element 5 and filter circuit 6 area on the circuit board 4.

[0034] See Figures 1-5 Furthermore, a grounding pad 8 is provided on the circuit board 4, and the shield 7 is fixedly connected to the grounding pad 8 by solder to achieve electrical grounding.

[0035] The circuit board 4 has a grounding pad 8, and the shield 7 is firmly soldered to the grounding pad 8 to achieve grounding.

[0036] See Figures 1-5 Furthermore, the inner wall of the fixed housing 3 is provided with a mounting groove 31 at the position corresponding to the Hall element 5, and the Hall element 5 is fixedly installed in the mounting groove 31.

[0037] See Figures 1-5 Furthermore, the magnetic ring 2 is a sector-shaped magnetic ring with its magnetic poles distributed along the circumference.

[0038] When the driver rotates the throttle housing 1, the magnetic ring 2 rotates accordingly, and the Hall element 5 senses the changing magnetic field and outputs a linear voltage signal. This signal first passes through the RC filter circuit 6, where high-frequency interference components are filtered out. Then, the filtered speed control signal is transmitted to the electric vehicle controller through the output wire.

[0039] During this process, the metal shield 7 isolates the internal sensitive electronic components from the complex external electromagnetic environment, further ensuring signal integrity.

[0040] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. An anti-interference Hall effect throttle for electric vehicles, characterized in that: include, A throttle housing (1) is provided with a magnetic ring (2) at one end of the throttle housing (1), and a fixed housing (3) is provided at the end of the magnetic ring (2) away from the throttle housing (1). A circuit board (4) is provided on one side of the fixed housing (3), and a Hall element (5) is integrated on the circuit board (4). The circuit board (4) also integrates a filter circuit (6) and a shielding structure; the filter circuit (6) is electrically connected to the signal output terminal of the Hall element (5), and the shielding structure includes a shielding cover (7) covering the surface of the circuit board (4), and the shielding cover (7) is grounded.

2. The anti-interference electric vehicle Hall effect throttle according to claim 1, characterized in that: The filter circuit (6) is an RC low-pass filter circuit, including a resistor (61) and a capacitor (62). The resistor (61) is connected in series with the signal output terminal of the Hall element (5), and one end of the capacitor (62) is connected to the rear end of the resistor (61), and the other end is grounded.

3. The anti-interference electric vehicle Hall effect throttle according to claim 2, characterized in that: The shield (7) is a metal shield made of magnetic and conductive material, and completely covers the area where the Hall element (5) and the filter circuit (6) are located.

4. The anti-interference electric vehicle Hall effect throttle according to claim 1, characterized in that: The circuit board (4) is also provided with a grounding pad (8), and the shield (7) is fixedly connected to the grounding pad (8) by solder and achieves electrical grounding.

5. The anti-interference electric vehicle Hall effect throttle according to claim 1, characterized in that: The inner wall of the fixed housing (3) has a mounting groove (31) at the position corresponding to the Hall element (5), and the Hall element (5) is fixedly installed in the mounting groove (31).

6. The anti-interference electric vehicle Hall effect throttle according to claim 5, characterized in that: The magnetic ring (2) is a fan-shaped magnetic ring with its magnetic poles distributed along the circumference.

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