Hall sensor circuit for 12V automobile generator system

Abstract

The utility model discloses a Hall sensor circuit for a 12V automobile generator system, which comprises a detection module, the detection module comprises three Hall sensor chips IC1, IC2 and IC3, and the VDD ends of the Hall sensor chips IC1, IC2 and IC3 are connected and connected with a power supply module; a conventional control Hall chip powered by 5-24V is used for designing a Hall sensor suitable for a 12V automobile generator system, signal output of a Hall device is achieved through a peripheral circuit, and implementation is easy. The problems of low sensing sensitivity and large error of a current 12V generator system sensor in the market are solved, and the anti-interference capability to the interference generated by the generator is enhanced. The designed Hall sensor is simple in structure, complete in function, high in applicability, high in expansibility and suitable for various use environments and working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of Hall sensors, in particular to a Hall sensor circuit for a 12V automobile generator system. Background Art

[0002] In automotive applications, Hall sensors are often used in brushless DC motors, such as fans and wiper controllers, to determine rotor position or provide speed feedback. With the development of the automotive industry, more and more vehicles are using a single motor as both a starter and a generator to save engine compartment space and reduce costs. In these cases, the generator no longer relies on a regulator to control power generation. Instead, the ECU and Hall sensors control the motor's starting and power generation, powering the vehicle's onboard electrical appliances.

[0003] Existing Hall sensors, typically used in brushless motors, are small and require close mounting to the magnet. However, when used in generators, due to their large size and the sensor's location far from the rotor's magnetic ring, this can lead to large errors, low sensitivity, or even no sensing of the magnetic field when the magnetic field passes through the Hall sensor. Some Hall sensors used in brushless DC motors in electric vehicles typically require the sensor to be fixed to the end face of the motor's stator, with circuit leads drilled through the motor and connected to the stator's power supply. This installation method is cumbersome and costly, and is susceptible to interference from the motor itself, resulting in inaccurate sensor output.

[0004] Therefore, a Hall sensor circuit for a 12V automobile generator system is proposed. Summary of the Invention

[0005] The purpose of the present utility model is to provide a Hall sensor circuit for a 12V automobile generator system to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a Hall sensor circuit for a 12V automobile generator system, comprising a detection module, wherein the detection module comprises three Hall sensor chips IC1, IC2, and IC3, wherein the VDD terminals of the Hall sensor chips IC1, IC2, and IC3 are connected and connected to a power supply module;

[0007] The VOUT terminals of the Hall sensor chips IC1, IC2 and IC3 are connected to resistors R1, R2 and R3 respectively. The resistors R1, R2 and R3 are all connected to output modules for outputting Hall sensor chip signals.

[0008] Preferably: the output module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, and capacitor C9;

[0009] One end of the capacitor C4 and the capacitor C5 is connected to the resistor R1, and the other end is grounded;

[0010] One end of the capacitor C6 and the capacitor C7 is connected to the resistor R2, and the other end is grounded;

[0011] One end of the capacitor C8 and the capacitor C9 is connected to the resistor R3, and the other end is grounded.

[0012] Preferably: the power supply module includes capacitor C1, capacitor C2, capacitor C3 and resistor R4;

[0013] One end of the capacitor C1 , the capacitor C2 and the capacitor C3 is connected to the VDD end of the Hall sensor chips IC1 , IC2 and IC3 .

[0014] Preferably, the resistor R4 is connected between the capacitor C1 and the capacitor C2.

[0015] Preferably, the GND terminals of the Hall chips IC1, IC2 and IC3 are grounded.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The conventional control Hall chip design using 5-24V power supply is suitable for the Hall sensor of the 12V automobile generator system, and the signal output of the Hall device is realized through the peripheral circuit, which is simple to implement.

[0018] 2. Improve the low sensitivity and large error of sensors currently used in 12V generator systems on the market, and enhance the anti-interference ability of the generator itself.

[0019] 3. The designed Hall sensor has a simple structure, complete functions, strong applicability and scalability, and can be applied to a variety of usage environments and working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the circuit diagram of the utility model;

[0021] Figure 2 This is the peripheral application block diagram of the Hall sensor of this utility model. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] See also Figure 1-2The utility model provides a technical solution: a Hall sensor circuit for a 12V automobile generator system, comprising a detection module, the detection module comprising three Hall sensor chips IC1, IC2 and IC3, the GND terminals of the Hall sensor chips IC1, IC2 and IC3 being grounded, the VDD terminals of the Hall sensor chips IC1, IC2 and IC3 being connected and connected to a power supply module;

[0024] The VOUT terminals of the Hall sensor chips IC1, IC2, and IC3 are connected to resistors R1, R2, and R3, respectively. The resistors R1, R2, and R3 are all connected to output modules for outputting Hall sensor chip signals.

[0025] like Figure 2 As shown in the peripheral connection diagram, the generator rotor is connected to the carbon brushes, and the generator stator is connected to the rectifier in the vehicle through the carbon brushes. Three-phase power is input, and the ECU is connected to the positive and negative poles of the carbon brushes. The ECU controls the size of the rotor current to adjust the generator voltage.

[0026] The detection module is close to the rotor position. When the rotor is powered on, the rotor magnetic field is enhanced. The three sensor chips are located at different angles to detect the rotor magnetic field and output different high and low level signals to the ECU so that the ECU can judge the rotor position to confirm whether to pass three-phase power to the motor.

[0027] like Figure 1 As shown: the output module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, and capacitor C9;

[0028] One end of capacitor C4 and capacitor C5 is connected to resistor R1, and the other end is grounded; one end of capacitor C6 and capacitor C7 is connected to resistor R2, and the other end is grounded; one end of capacitor C8 and capacitor C9 is connected to resistor R3, and the other end is grounded.

[0029] like Figure 1 As shown: the power supply module includes capacitor C1, capacitor C2, capacitor C3 and resistor R4;

[0030] One end of the capacitor C1 , the capacitor C2 and the capacitor C3 is connected to the VDD end of the Hall sensor chips IC1 , IC2 and IC3 , and the resistor R4 is connected between the capacitor C1 and the capacitor C2 .

[0031] Resistor R4 is a current-limiting resistor that prevents abnormal power supply voltage from causing high voltage and high current injection, which could damage the sensor chip. Capacitors C1, C2, and C3 are filter capacitors that filter out noise, reduce signal interference at the power supply end, and prevent it from affecting the accuracy of the sensor chip during operation.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Hall sensor circuit for a 12V automotive generator system, including a detection module, characterized in that: The detection module includes three Hall sensor chips IC1, IC2 and IC3, and the VDD terminals of the Hall sensor chips IC1, IC2 and IC3 are connected to a power supply module; The VOUT terminals of the Hall sensor chips IC1, IC2 and IC3 are connected to resistors R1, R2 and R3 respectively. The resistors R1, R2 and R3 are all connected to output modules for outputting Hall sensor chip signals.

2. The Hall sensor circuit for a 12V automotive generator system according to claim 1, characterized in that: The output module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, and capacitor C9; One end of the capacitor C4 and the capacitor C5 is connected to the resistor R1, and the other end is grounded; One end of the capacitor C6 and the capacitor C7 is connected to the resistor R2, and the other end is grounded; One end of the capacitor C8 and the capacitor C9 is connected to the resistor R3, and the other end is grounded.

3. The Hall sensor circuit for a 12V automobile generator system according to claim 1, characterized in that: The power supply module includes capacitor C1, capacitor C2, capacitor C3 and resistor R4; One end of the capacitor C1 , the capacitor C2 and the capacitor C3 is connected to the VDD end of the Hall sensor chips IC1 , IC2 and IC3 .

4. The Hall sensor circuit for a 12V automobile generator system according to claim 3, characterized in that: The resistor R4 is connected between the capacitor C1 and the capacitor C2.

5. The Hall sensor circuit for a 12V automobile generator system according to claim 1, characterized in that: The GND terminals of the Hall sensor chips IC1, IC2 and IC3 are grounded.

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