Anti-interference Hall circuit of acceleration rotating handle of electric vehicle

Abstract

The utility model belongs to the field of electric vehicles, and relates to an anti-interference Hall circuit for an acceleration handle of an electric vehicle, which comprises a power input circuit, an LC filter circuit, a first capacitor filter circuit, an electrostatic protection circuit, a voltage stabilizing circuit, a high-frequency noise suppression circuit and a second capacitor filter circuit which are electrically connected in sequence, the voltage stabilizing circuit is further electrically connected with the second capacitor filter circuit, the LC filter circuit is further electrically connected with the high-frequency noise suppression circuit, the power input circuit is used for introducing battery voltage of the electric vehicle, and the LC filter circuit is used for filtering high-frequency noise and ripples in power input. The first capacitor filter circuit is used for further filtering high-frequency noise and ripples in the power supply, the electrostatic protection circuit is used for preventing damage caused by electrostatic discharge, and the voltage stabilizing circuit is used for keeping output voltage stable. The accuracy and the reliability of the signal are improved; and the output voltage is further smoothed, and ripples and noise are remarkably reduced, so that the anti-interference capability and the stability of the whole circuit are improved.

Description

Technical Field

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

[0002] In the operation control of electric vehicles such as electric bicycles and motorcycles, the throttle is a crucial component. It uses Hall effect sensors to sense the rotation angle of the throttle and transmits corresponding electrical signals to the controller to adjust the vehicle's speed. However, electric vehicles face various complex electromagnetic interference environments during operation, such as electromagnetic noise generated by motor operation, surrounding electrical equipment, and power fluctuations. These interference signals can easily affect the normal operation of the Hall circuit, causing the Hall effect sensor to output incorrect signals. This leads to unstable speed control, resulting in problems such as unintended acceleration, deceleration, or speed fluctuations, seriously affecting the driving safety and comfort of the electric vehicle, and potentially damaging its electrical system. Therefore, designing a Hall effect circuit for an electric vehicle throttle with good anti-interference performance is essential. Utility Model Content

[0003] To address the aforementioned deficiencies in the prior art, this utility model provides an anti-interference Hall circuit for the throttle grip of an electric vehicle, comprising:

[0004] The circuit consists of a power input circuit, an LC filter circuit, a first capacitor filter circuit, an electrostatic protection circuit, a voltage regulator circuit, a high-frequency noise suppression circuit, and a second capacitor filter circuit, all electrically connected in sequence. The voltage regulator circuit is also electrically connected to the second capacitor filter circuit, and the LC filter circuit is also electrically connected to the high-frequency noise suppression circuit. The power input circuit is used to introduce the battery voltage of the electric vehicle. The LC filter circuit is used to filter out high-frequency noise and ripple in the power input. The first capacitor filter circuit is used to further filter out high-frequency noise and ripple in the power supply. The electrostatic protection circuit is used to prevent electrostatic discharge from damaging the anti-interference Hall circuit of the electric vehicle's throttle. The voltage regulator circuit is used to maintain the stability of the output voltage. The high-frequency noise suppression circuit is used to filter out high-frequency noise signals in the anti-interference Hall circuit of the electric vehicle's throttle. The second capacitor filter circuit is used to further smooth the output voltage and reduce ripple and noise.

[0005] Preferably, the power input circuit includes two positive power inputs (VCC) and two negative power inputs (GND).

[0006] Preferably, the LC filter circuit includes: one end of capacitor C2 is connected to one end of capacitor C1, and the other end of capacitor C1 is connected to one end of inductor L1.

[0007] Preferably, the first capacitor filter circuit includes: one end of capacitor C5 connected to one end of capacitor C6, and one end of capacitor C7 connected to one end of capacitor C8.

[0008] Preferably, the electrostatic discharge protection circuit includes: the positive terminal of ESD protection diode D5 is connected to the positive terminal of ESD protection diode D6.

[0009] Preferably, the voltage regulator circuit includes a voltage regulator chip U1.

[0010] Preferably, the high-frequency noise suppression circuit includes a magnetic bead FB1.

[0011] Preferably, the second capacitor filter circuit includes: one end of capacitor C4 is connected to one end of capacitor C3.

[0012] Preferably, the ESD protection diode D5 and the ESD protection diode are both diodes from the D6SOD series, SOT series and DFN series.

[0013] Preferably, the voltage regulator chip U1 is any one of MS49E, 1117 series, LM1117 series, FS6206 series, HT7333 series and mic29150.

[0014] The anti-interference Hall circuit for the electric vehicle throttle lever of this utility model has the following beneficial effects: It introduces the electric vehicle battery voltage through the power input circuit, providing stable energy for subsequent circuits; the dual function of the LC filter circuit and the first capacitor filter circuit effectively filters out high-frequency noise and ripple in the power supply, improving the purity of the circuit; the addition of the electrostatic protection circuit significantly enhances the circuit's anti-static discharge capability, effectively avoiding potential damage to the circuit caused by static electricity; the introduction of the voltage regulator circuit ensures the stability of the output voltage, providing a reliable working environment for sensitive components such as the Hall sensor; the high-frequency noise suppression circuit further filters out high-frequency noise signals in the circuit, improving the accuracy and reliability of the signal; the application of the second capacitor filter circuit further smooths the output voltage, significantly reducing ripple and noise, thereby improving the anti-interference capability and stability of the entire circuit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0016] Figure 1 This is a schematic diagram of the module structure of the anti-interference Hall circuit for the electric vehicle throttle lever of this utility model;

[0017] Figure 2 This is a schematic diagram of a preferred embodiment of the anti-interference Hall circuit for the throttle grip of an electric vehicle according to this utility model.

[0018] In the diagram, 10 is the power input circuit, 20 is the LC filter circuit, 30 is the first capacitor filter circuit, 40 is the electrostatic protection circuit, 50 is the voltage regulator circuit, 60 is the high-frequency noise suppression circuit, and 70 is the second capacitor filter circuit. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Please see Figure 1 This is a schematic diagram of the module configuration of the anti-interference Hall circuit for the electric vehicle throttle grip of this utility model. Figure 1As shown, the anti-interference Hall circuit for the electric vehicle throttle provided in the first embodiment of this utility model includes at least a power input circuit 10, an LC filter circuit 20, a first capacitor filter circuit 30, an electrostatic protection circuit 40, a voltage regulator circuit 50, a high-frequency noise suppression circuit 60, and a second capacitor filter circuit 70, which are electrically connected in sequence. The voltage regulator circuit 50 is also electrically connected to the second capacitor filter circuit 70, and the LC filter circuit 20 is also electrically connected to the high-frequency noise suppression circuit 60. The power input circuit 10 is used to introduce the battery voltage of the electric vehicle. The LC filter circuit 20 is used to filter out high-frequency noise and ripple in the power input. The first capacitor filter circuit 30 is used to further filter out high-frequency noise and ripple in the power supply. The electrostatic protection circuit 40 is used to prevent electrostatic discharge from damaging the anti-interference Hall circuit for the electric vehicle throttle. The voltage regulator circuit 50 is used to maintain the stability of the output voltage. The high-frequency noise suppression circuit 60 is used to filter out high-frequency noise signals in the anti-interference Hall circuit for the electric vehicle throttle. The second capacitor filter circuit 70 is used to further smooth the output voltage and reduce ripple and noise.

[0023] Figure 2 This is a schematic diagram of a preferred embodiment of the anti-interference Hall circuit for the throttle grip of an electric vehicle according to this utility model. Figure 2 As shown, the power input circuit 10 includes two positive power inputs (VCC) and two negative power inputs (GND). The power input circuit 10 is designed for redundancy to ensure the stability of the power supply.

[0024] In a specific implementation, the power input circuit 10 may also include a fuse and a rectifier. The fuse is used to prevent damage to the circuit when the current is too large, and the rectifier converts the AC power into DC power to ensure a stable power supply to the subsequent circuits.

[0025] The LC filter circuit 20 includes: one end of capacitor C2 connected to one end of capacitor C1, and the other end of capacitor C1 connected to one end of inductor L1. Inductor L1 (10uH) is located on the power input line, between the two VCC inputs. The main function of the inductor is to block high-frequency current from passing through while allowing low-frequency current to pass through, further filtering out high-frequency interference signals in the power supply. C1 and C2 are connected between VCC and GND, respectively. Capacitors C1 and C2 are used to filter out high-frequency noise and ripple in the power supply, ensuring the purity of the power supply. When an AC signal passes through the inductor, due to the inductor's self-inductance, it will impede the AC signal, while the DC signal is unaffected. The capacitor presents low impedance to AC signals and high impedance to DC signals. Therefore, the LC filter circuit can effectively smooth the DC voltage and reduce voltage fluctuations.

[0026] The first capacitor filter circuit 30 includes: one end of capacitor C5 connected to one end of capacitor C6, and one end of capacitor C7 connected to one end of capacitor C8. Unlike the LC filter circuit 20, the capacitor filter circuit mainly relies on the charging and discharging characteristics of the capacitor. When the power supply voltage increases, the capacitor charges; when the power supply voltage decreases, the capacitor discharges, thereby maintaining a stable output voltage. This circuit is usually connected in parallel on the power supply line, and the capacitance and type of the capacitor are selected according to actual needs.

[0027] The electrostatic discharge (ESD) protection circuit 40 includes: the positive terminals of ESD protection diodes D5 and D6 connected together. Both ESD protection diodes D5 and D6 are from the D6SOD, SOT, and DFN series. These ESD protection diodes have different package types to suit different circuit board layouts and assembly process requirements. For example, small packages such as SOD-323 and SOD-523 are suitable for space-constrained electronic devices, while the DFN series performs well in high-frequency applications due to its low inductance and low capacitance characteristics. In this embodiment, both ESD protection diodes D5 and D6 are selected as SOD-323. This embodiment includes two ESD protection diodes (labeled ESD), connected between VCC and GND, and between the input pin of the voltage regulator chip U1 and GND, respectively.

[0028] The function of ESD protection diodes D5 and D6 is to prevent damage to chips caused by electrostatic discharge. When an electrostatic pulse occurs, the ESD diode quickly conducts, releasing the electrostatic energy to ground. When an electrostatic discharge occurs, it quickly conducts, guiding a high current to ground, thus protecting sensitive electronic components from damage. Simultaneously, it quickly returns to a high impedance state after discharge, continuing to protect the equipment. Furthermore, some specific models of ESD protection diodes also have functions such as limiting voltage peaks, further enhancing the protection effect on electronic equipment.

[0029] The voltage regulator circuit 50 includes a voltage regulator chip U1. In specific implementations, the voltage regulator chip U1 includes, but is not limited to, any of the MS49E, 1117 series, LM1117 series, FS6206 series, HT7333 series, and mic29150 series. The 1117 series / LM1117 series voltage regulator chips have stable performance and good linear regulation. The FS6206 series voltage regulator chips feature low power consumption and high efficiency to extend battery life. The HT7333 series voltage regulator chips feature high accuracy and low noise. The mic29150 voltage regulator chip can still operate normally when the input voltage is below 3.5V. In this embodiment, the voltage regulator chip U1 is selected as MS49E. The voltage regulator chip (U1) MS49E has three pins: VDD (input), GND (ground), and OUT (output). Its function is to stabilize the input VCC voltage to a specific value through a sensing magnet and output a stable voltage from the OUT pin. The MS49E voltage regulator chip also functions as a linear Hall effect sensor chip, rather than a traditional voltage regulator chip. The MS49E boasts high sensitivity, accurately detecting even weak changes in magnetic fields and converting them into corresponding electrical signals. Simultaneously, the chip exhibits extremely low output noise, ensuring high clarity and accuracy in signal transmission. In terms of power consumption, the MS49E is designed to be highly energy-efficient, effectively reducing the overall system power consumption.

[0030] From a technical specification perspective, the MS49E uses a TO92 package, making it compact and easy to integrate into various electronic devices. Its square Hall effect design cleverly eliminates mechanical stress effects, improving the chip's reliability and stability. Furthermore, the MS49E boasts excellent temperature characteristics, operating within a voltage range of 3.0~6.5V and functioning stably over a wide temperature range of -40~100℃.

[0031] The high-frequency noise suppression circuit 60 includes a ferrite bead FB1. Ferrite beads, as a functional material, have multiple functions. In the electronics field, ferrite beads, as a passive component, are mainly used to suppress high-frequency noise in circuits. Their composition is mostly ferrite, which can utilize the heat dissipation effect generated by high-frequency current to effectively filter out high-frequency noise and spike interference on signal lines and power lines, ensuring the stability and reliability of the circuit.

[0032] The second capacitor filter circuit 70 includes: one end of capacitor C4 connected to one end of capacitor C3. Capacitors C3 and C4 are connected between VCC and GND, respectively. Capacitors C3 and C4 are used to filter out high-frequency noise and ripple in the power supply, ensuring the purity of the power supply.

[0033] After filtering, voltage regulation, and ESD protection, the power supply is output from the OUT pin of the voltage regulator chip U1 for use by other circuits.

[0034] The working principle of the anti-interference Hall circuit for the electric vehicle throttle lever of this utility model is as follows:

[0035] Power Input and Preliminary Filtering: When the battery voltage of the electric vehicle enters the circuit system through the power input circuit 10, the LC filter circuit 20 and the first capacitor filter circuit 30 begin preliminary filtering of the power supply. Inductors impede AC signals, while capacitors present low impedance to AC signals, thus filtering out high-frequency noise and ripple.

[0036] Electrostatic discharge (ESD) protection: The ESD protection circuit 40 is always operational during power input and filtering. Once an ESD signal is detected, the ESD protection circuit 40 quickly turns on, bypassing the electrostatic charge to ground, thereby preventing ESD from damaging the circuit.

[0037] Voltage Regulation and High-Frequency Noise Suppression: The power signal, after preliminary filtering, enters the voltage regulator circuit 50 and the high-frequency noise suppression circuit 60. The voltage regulator circuit 50 maintains a constant output voltage by adjusting its internal power consumption or high-frequency switching operation. The high-frequency noise suppression circuit 60 filters out high-frequency noise signals in the circuit through components such as ferrite beads, common-mode inductors, and filter capacitors.

[0038] The second capacitor filter and Hall element operation: After voltage regulation and high-frequency noise suppression, the voltage signal enters the second capacitor filter circuit 70 for further smoothing. The final voltage signal output to the Hall element (such as MS49E in this embodiment) has high quality and low noise. After sensing the change in the magnetic field, the Hall element outputs a corresponding electrical signal, which is transmitted to the controller through the sensing circuit. The controller determines the driving speed and direction of the electric vehicle based on the magnitude and direction of the signal, and adjusts the motor to achieve vehicle speed control.

[0039] Anti-interference performance: Throughout the entire operation, the anti-interference Hall circuit of the electric vehicle's throttle effectively resists electromagnetic interference through the synergistic effect of various circuit components. The power input and filtering circuit ensures stable power supply; the electrostatic protection circuit 40 prevents damage to the circuit from electrostatic discharge; the voltage regulation and high-frequency noise suppression circuit 60 ensures that the Hall element receives a stable and accurate voltage signal; and the second capacitor filtering circuit 70 further smooths the output voltage. These measures collectively improve the accuracy and stability of acceleration control, ensuring the normal operation of the electric vehicle.

[0040] In other words, the power supply, input from VCC, first passes through an LC filter composed of capacitors C1 and C2 and inductor L1 to filter out high-frequency interference signals. The filtered power supply is then input to the voltage regulator chip U1, which stabilizes the voltage to a specific value and outputs a stable voltage from the OUT pin. ESD protection diodes at the power input and the input pins of chip U1 provide electrostatic discharge protection, ensuring the circuit's safety when encountering electrostatic pulses. Finally, the filtered, regulated, and protected power supply is output from the OUT pin to power other electronic devices or circuits. This embodiment ensures the stability and safety of the output power supply through multi-stage protection and filtering mechanisms.

[0041] The beneficial effects of this invention, through the design of the above embodiments, are as follows: The electric vehicle battery voltage is introduced through the power input circuit, providing stable energy for subsequent circuits; the dual function of the LC filter circuit and the first capacitor filter circuit effectively filters out high-frequency noise and ripple in the power supply, improving the purity of the circuit; the addition of the electrostatic protection circuit significantly enhances the circuit's anti-static discharge capability, effectively avoiding potential damage to the circuit caused by static electricity; the introduction of the voltage regulator circuit ensures the stability of the output voltage, providing a reliable working environment for sensitive components such as Hall sensors; the high-frequency noise suppression circuit further filters out high-frequency noise signals in the circuit, improving the accuracy and reliability of the signal; the application of the second capacitor filter circuit further smooths the output voltage, significantly reducing ripple and noise, thereby improving the anti-interference capability and stability of the entire circuit.

[0042] This utility model has been described based on specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of this utility model. Furthermore, to adapt to specific applications of this utility model, numerous modifications can be made without departing from its protection scope. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the protection scope of the claims.

Claims

1. An anti-interference Hall circuit for an electric vehicle throttle, characterized in that, include: The circuit consists of a power input circuit, an LC filter circuit, a first capacitor filter circuit, an electrostatic protection circuit, a voltage regulator circuit, a high-frequency noise suppression circuit, and a second capacitor filter circuit, all electrically connected in sequence. The voltage regulator circuit is also electrically connected to the second capacitor filter circuit, and the LC filter circuit is also electrically connected to the high-frequency noise suppression circuit. The power input circuit is used to introduce the battery voltage of the electric vehicle. The LC filter circuit is used to filter out high-frequency noise and ripple in the power input. The first capacitor filter circuit is used to further filter out high-frequency noise and ripple in the power supply. The electrostatic protection circuit is used to prevent electrostatic discharge from damaging the anti-interference Hall circuit of the electric vehicle's throttle. The voltage regulator circuit is used to maintain the stability of the output voltage. The high-frequency noise suppression circuit is used to filter out high-frequency noise signals in the anti-interference Hall circuit of the electric vehicle's throttle. The second capacitor filter circuit is used to further smooth the output voltage and reduce ripple and noise.

2. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 1, characterized in that, The power input circuit includes two positive VCC inputs and two negative GND inputs.

3. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 1, characterized in that, The LC filter circuit includes: one end of capacitor C2 is connected to one end of capacitor C1, and the other end of capacitor C1 is connected to one end of inductor L1.

4. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 1, characterized in that, The first capacitor filter circuit includes: one end of capacitor C5 is connected to one end of capacitor C6, and one end of capacitor C7 is connected to one end of capacitor C8.

5. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 1, characterized in that, The electrostatic discharge protection circuit includes: the positive terminal of ESD protection diode D5 is connected to the positive terminal of ESD protection diode D6.

6. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 1, characterized in that, The voltage regulator circuit includes a voltage regulator chip U1.

7. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 1, characterized in that, The high-frequency noise suppression circuit includes: a magnetic bead FB1.

8. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 5, characterized in that, The ESD protection diodes D5 and D6 are both diodes from the D6SOD series, SOT series, and DFN series.

9. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 5, characterized in that, The ESD protection diodes D5 and D6 are both diodes from the D6SOD series, SOT series, and DFN series.

10. The anti-interference Hall circuit for the electric vehicle throttle lever according to claim 6, characterized in that, The voltage regulator chip U1 is any one of MS49E, 1117 series, LM1117 series, FS6206 series, HT7333 series and mic29150.

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