Blower control circuit, electronic device and vehicle

Abstract

A blower control circuit, which relates to the field of electric motor control. The blower control circuit comprises a control module (11) for generating an initial control voltage, a comparison module (12) for acquiring a comparison result between a target voltage value and a zero-point potential voltage value, a calculation module (13) for generating a target control voltage, and a speed regulation module (14) for enabling a blower on the basis of the target control voltage. Since an initial control voltage output by a control module may be affected by a ground bounce voltage caused by a ground bounce phenomenon, a comparison module is provided, and a comparison result of a comparison performed by the comparison module on the potential rise of a grounding end in the control module with respect to a zero-point potential is used to adjust an instruction voltage in a calculation module, such that a target control voltage generated after adjustment is not affected by the ground bounce voltage, and the target control voltage output to a speed regulation module can meet the requirements for controlling a blower, thereby ultimately enabling the blower to generate an air volume that meets user requirements. Also disclosed are an electronic device and a vehicle.

Description

A blower control circuit, electronic device and vehicle

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410684251X, filed on May 29, 2024, and entitled "A blower control circuit, electronic device and vehicle", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of motor control, in particular to a blower control circuit, electronic device and vehicle. BACKGROUND

[0004] In the control process of an air conditioner, the motor of the air conditioner is mainly controlled to rotate by reading a single-ended analog signal output by a controller connected to the air conditioner. However, when a ground bounce phenomenon occurs in the ground terminal of the controller circuit, the single-ended analog signal output by the controller circuit will be affected by the ground bounce voltage, causing the single-ended analog signal output by the controller to be abnormal, which cannot meet the demand of controlling the blower, and affects the user's demand for using the blower. SUMMARY

[0005] Therefore, the present application provides a blower control circuit, electronic device and vehicle, which mainly aims to solve the problem that the single-ended analog signal generated by the control circuit of the blower cannot accurately control the blower to work due to the influence of the ground bounce phenomenon.

[0006] To achieve the above-mentioned purpose, the first aspect of the present application discloses a blower control circuit, which comprises a control module, a comparison module, a calculation module and a speed regulation module.

[0007] The control module is configured to generate an initial control voltage according to an instruction voltage, and the speed regulation module is configured to enable the blower according to the initial control voltage.

[0008] The comparison module is configured to obtain a comparison result between a target voltage value of a ground terminal in the control module and a 0-point potential voltage value, and the comparison result represents a ground bounce voltage value of the ground terminal in the control module.

[0009] The calculation module is configured to adjust the initial control voltage to generate a target control voltage according to the comparison result.

[0010] The speed regulation module is configured to enable the blower according to the target control voltage.

[0011] The second aspect of the present application provides an electronic device, which comprises:

[0012] at least one processor; and a memory communicatively connected with the at least one processor; wherein the memory is connected to the blower control circuit as claimed in any one of the first aspect, the memory can identify at least one circuit parameter output by the blower control circuit, and the at least one processor executes the circuit parameter.

[0013] In the third aspect of the present application, a vehicle is provided, wherein the vehicle is equipped with the blower control circuit as claimed in the first aspect or the electronic device as claimed in the second aspect.

[0014] In summary, according to the technical solution disclosed in the present application, in order to solve the problem that the single-ended analog signal generated by the control circuit of the blower cannot accurately control the blower to work due to the influence of the ground bounce phenomenon, the present application provides a blower control circuit, an electronic device and a vehicle. In the blower control circuit, it comprises: a control module, a comparison module, a calculation module and a speed regulation module; the control module is used to generate an initial control voltage according to an instruction voltage; the comparison module is used to obtain a comparison result between a target voltage value of a ground terminal in the control module and a 0-point potential voltage value, and the comparison result represents a ground bounce voltage value of the ground terminal in the control module; the calculation module is used to adjust the initial control voltage according to the comparison result to generate a target control voltage; and the speed regulation module is used to enable the blower according to the target control voltage. Since the initial control voltage output by the control module may be affected by the ground bounce voltage of the ground bounce phenomenon, the technical solution of the present application sets up a comparison module to compare the comparison result of the potential lifting of the ground terminal in the control module relative to the 0-point potential in the comparison module, and adjusts the instruction voltage in the calculation module, so that the target control voltage generated after adjustment is not affected by the ground bounce voltage, and the target control voltage output to the speed regulation module can meet the demand of controlling the blower, and finally the generated air volume of the blower meets the demand of the user.

[0015] The above description is only a summary of the technical solution of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings herein are incorporated into the specification and form part of the specification, show embodiments consistent with the present application, and together with the specification serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0018] Fig. 1 shows a logic structure diagram of a blower control circuit according to an embodiment of the present application.

[0019] Fig. 2 shows a structure diagram of a control module according to an embodiment of the present application.

[0020] Fig. 3 shows a circuit structure diagram of a comparator according to an embodiment of the present application.

[0021] Fig. 4 shows a circuit structure diagram of a first comparison module according to an embodiment of the present application.

[0022] Fig. 5 shows a circuit structure diagram of a second comparison module according to an embodiment of the present application.

[0023] Fig. 6 shows a circuit structure diagram of a subtracter according to an embodiment of the present application.

[0024] Fig. 7 shows a circuit structure diagram of a calculation module according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the above-mentioned purposes, features and advantages of the present application, the solutions of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In order to solve the problem that the single-ended analog signal generated by the control circuit of the blower cannot accurately control the blower to work due to the influence of the ground bounce phenomenon of the signal generated by the control circuit of the blower, the present application provides the following embodiments to solve the above-mentioned problem:

[0027] Embodiment One

[0028] The present embodiment provides a logic structure diagram of a blower control circuit, as shown in Fig. 1, which comprises a control module 11, a comparison module 12, a calculation module 13 and a speed regulation module 14.

[0029] The control module 11 is used to generate an initial control voltage according to an instruction voltage.

[0030] During the working process of the blower, especially during the working process of the vehicle-mounted blower, the initial control voltage is generated in the control module 11 according to the instruction voltage generated by manual adjustment or automatic adjustment, and the blower is enabled according to the initial control voltage.

[0031] The comparison module 12 is used to obtain the comparison result between the target voltage value of the grounding terminal in the control module 11 and the zero-point potential voltage value. The comparison result represents the ground bounce voltage value of the grounding terminal in the control module 11.

[0032] The initial control voltage generated by control module 11 is referenced to its ground terminal. In the actual circuit, control module 11 is integrated as a separate circuit board within the blower control circuit board. There is a dielectric connection between the ground terminal of control module 11 and the ground terminal of the blower control circuit. However, the dielectric itself has a certain impedance, resulting in a voltage drop at the ground terminal of control module 11, known as the ground bounce voltage. Since the ground voltage of control module 11 participates in the generation of the initial control voltage, and this ground bounce voltage is included, the final generated initial control voltage is inaccurate. This makes it difficult for the initial control voltage generated by control module 11 to support the start-up of the blower, and the blower's airflow does not meet the user's requirements.

[0033] In this embodiment, a comparison module 12 is further designed. This comparison module 12 is used to calculate the comparison result between the target voltage value of the ground terminal in the control module and the zero-point potential voltage value to determine the difference when ground bounce voltage exists in the control module 11. If a difference exists, it is determined that ground bounce voltage has occurred at the ground terminal of the control module. The initial control voltage generated at this time is inaccurate. Since the ground terminal of the control module 11 participates in the generation of the initial control voltage, based on this, the comparison module 12 of this embodiment compares the voltage difference between the ground terminal and the zero-point potential voltage value in the control module 11 to determine the deviation of the ground terminal voltage when participating in the generation of the initial control voltage.

[0034] The calculation module 13 is used to adjust the initial control voltage and generate the target control voltage based on the comparison results.

[0035] In the calculation module, the "ground bounce voltage" is subtracted from the "initial control voltage, such as 3V," so that the initial control voltage is no longer a constant value, such as 3V, but a real-time changing "initial control voltage - ground bounce voltage." For the blower control circuit that uses the overall GND as a reference, its input voltage becomes "initial control voltage (target voltage - ground bounce voltage) + ground bounce voltage," thus ensuring that the actual control signal it receives is a stable "target control voltage," resolving the interference from the ground bounce voltage.

[0036] Speed ​​control module 14 is used to activate the blower according to the target control voltage.

[0037] The start-up and operating speed of the blower are controlled based on a preset or real-time adjusted target voltage. The target control voltage is the voltage the control system expects to apply to the blower motor to drive the blower at a specific speed. The target control voltage is typically calculated by the control system (such as an air conditioning controller, industrial automation system, or frequency converter) based on system requirements, set parameters, or sensor feedback. The control voltage can be continuously variable (e.g., through pulse width modulation (PWM) signals), allowing stepless adjustment of the blower speed within a certain range to adapt to different airflow demands or energy-saving requirements. In some simple systems, the target control voltage may be several discrete fixed values ​​corresponding to different blower operating speeds (e.g., low, medium, high speed), with different voltage levels used for segmented control. Starting the blower: Starting the blower means starting it from a standstill or resuming operation from a stopped state. Upon receiving a start command represented by the target control voltage, the control system closes the main circuit through appropriate switching elements (such as relays, contactors, or transistors), allowing the power supply voltage to reach the blower motor. Once power is established, the control system adjusts the actual voltage applied to the motor according to the target control voltage. This can be achieved in several ways: for simple resistive speed control systems, the voltage across the motor is adjusted by changing the resistance value connected in series in the motor circuit, thus changing the speed. More advanced systems may use pulse width modulation (PWM) technology, which simulates the desired target voltage using a fast-switching power supply (such as through power semiconductor devices like MOSFETs or IGBTs) with a specific duty cycle. The motor actually receives an average voltage, which is proportional to the duty cycle, thus achieving speed control. For AC motors, especially large industrial blowers, frequency converters may be used to adjust the power supply frequency, thereby changing the synchronous speed of the motor and achieving fine-grained speed control.

[0038] Example 2

[0039] In one possible embodiment, the comparison module 12 in Embodiment 1 of this application may include: a first comparison module 121, a second comparison module 122, and a subtractor 123;

[0040] The first comparison module 121 is used to obtain the intermediate potential value between the power supply voltage value at the power supply terminal and the target voltage value at the ground terminal in the control module 11, as the first potential value; the second comparison module 122 is used to obtain the intermediate potential value between the power supply voltage value at the power supply terminal and the zero-point potential voltage value, as the second potential value; the subtractor 122 is used to calculate the potential difference between the first potential value and the second potential value, and the potential difference value is used to represent the comparison result between the target voltage value at the ground terminal in the control module 11 and the zero-point potential voltage value.

[0041] In this embodiment, regarding the comparison calculation process of the comparison module 12, this embodiment proposes the specific components of the comparison module 12. When the power supply terminal is connected to the 0-point potential and the ground terminal in the control module respectively, since there is a ground bounce voltage at the ground terminal in the control module, the voltage value of the ground terminal in the control module is not 0. Therefore, although the first potential value and the second potential value are the intermediate potential values ​​of the two comparison modules respectively, there is a potential difference between the first potential value and the second potential value. By identifying the potential difference between the first potential value and the second potential value through the subtractor 123, the voltage difference between the ground terminal in the control module and the 0-point potential can be further calculated based on the potential difference. This voltage difference is equal to the ground bounce voltage value of the ground terminal in the control module.

[0042] Example 3

[0043] During the calculation of the potential difference, when extracting the first and second potential values, the first potential value may have a certain multiple relationship with the actual voltage difference between the power supply voltage at the power supply terminal and the grounding terminal in the control module, and the second potential value may have a certain multiple relationship with the actual voltage difference between the power supply voltage at the power supply terminal and the zero-point potential voltage. Therefore, the final calculated potential difference value will also have a certain multiple relationship with the actual grounding voltage value. To solve this problem, in one possible embodiment, based on embodiment two, the comparison module 12 in embodiment one of this application further includes: an amplifier circuit 124;

[0044] Amplifier circuit 124 is used to amplify the potential difference value to generate a target potential difference value. The target potential difference value is equal to the comparison result between the target voltage value of the ground terminal in the control module and the potential voltage value at point 0.

[0045] Because of the multiple relationship between the first potential value and the second potential value, the comparison result generated by the comparison calculation has a certain multiple relationship with the actual ground spring voltage. In this embodiment, the amplifier circuit 124 can amplify the comparison result so that the target potential difference generated by the amplification calculation is equal to the ground spring voltage value, and finally the comparison module 12 calculates and obtains the matching ground spring voltage value.

[0046] Example 4

[0047] A comparator is shown in Figure 3. Figure 3 discloses a circuit structure diagram of the comparator. In Figure 3, the first resistor R1 and the second resistor R2 form a first comparator module 121, and the third resistor R3 and the fourth resistor R4 form a second comparator module 122. The intermediate potential value Vin1 of the first comparator module 121 and the intermediate potential value Vin2 of the second comparator module 122 are read and input into the subtractor 123 respectively. The potential difference between the intermediate potential values ​​Vin1 and Vin2 is calculated and then restored by a 2x amplification circuit to obtain the target potential difference value. This target potential difference value is equal to the ground bounce voltage value of the ground terminal in the control module, that is, gnd1 of the first comparator module 121 and gnd2 of the second comparator module 122 in the figure. When R1 = R2 = R3 = R4,

[0048] Therefore, the GND of the entire vehicle is used as a reference:

[0049] Vin1=(V BAT –Vgnd1)÷2+V d (Ground spring voltage value)

[0050] Vin2=V BAT ÷2

[0051] Therefore, the output of the subtraction circuit is Vin1 – Vin2 = V d / 2

[0052] By amplifying the output of the subtraction circuit by a factor of 2, the actual V can be obtained. d value.

[0053] In one possible embodiment, based on Embodiment 2 or Embodiment 3, the first comparison module 121 in Embodiment 2 of this application includes:

[0054] A first resistor R1, a second resistor R2, and a first amplifier U1 are connected in series between the ground terminal and the power supply terminal in the control module. The positive input terminal of the first amplifier U1 is used to read the potential value between the first resistor R1 and the second resistor R2. The negative input terminal of the first amplifier U1 is connected to the output terminal of the first amplifier U1. The positive power supply terminal of the first amplifier U1 is connected to the power supply terminal, and the negative power supply terminal of the first amplifier U1 is connected to the ground terminal in the control module.

[0055] This embodiment further achieves the acquisition of the intermediate potential between the first resistor R1 and the second resistor R2. Specifically, as shown in Figure 4, Figure 4 discloses the circuit structure diagram of the first comparison module. In order to acquire the intermediate potential value, the first resistor R1 and the second resistor R2 in the first comparison module of this embodiment are further connected to the first amplifier U1. The first amplifier U1 in this embodiment also acts as a follower. Low-cost operational amplifiers such as LM2904 can be used to improve the overall load-carrying capacity of the circuit.

[0056] Example 5

[0057] In one possible embodiment, based on any one of Embodiments 2, 3, and 4, the second comparison module 122 in Embodiment 2 of this application includes:

[0058] The third resistor R3, the fourth resistor R4, and the second amplifier U2 have the same resistance value. The third resistor R3 and the fourth resistor R4 are connected in series between the zero-point potential terminal and the power supply terminal. The zero-point potential terminal is used to provide the zero-point potential voltage value. The positive input terminal of the second amplifier U2 is used to read the potential value between the third resistor R3 and the fourth resistor R4. The negative input terminal of the second amplifier U2 is connected to the output terminal of the second amplifier U2. The positive power supply terminal of the second amplifier U2 is connected to the power supply terminal, and the negative power supply terminal of the second amplifier U2 is connected to the ground terminal in the control module 11.

[0059] This embodiment further achieves the acquisition of the intermediate potential between the third resistor R3 and the fourth resistor R4. Specifically, as shown in Figure 5, Figure 5 discloses the circuit structure diagram of the second comparison module. In order to acquire the intermediate potential value, the third resistor R3 and the fourth resistor R4 in the second comparison module of this embodiment are further connected to the second amplifier U2. The second amplifier U2 in this embodiment also acts as a follower and can use low-cost operational amplifiers such as LM2904, which improves the overall load-carrying capacity of the circuit.

[0060] Example 6

[0061] In one possible embodiment, based on any one of Embodiments 2, 3, 4, and 5, the subtractor 123 in Embodiment 2 of this application includes:

[0062] The fifth resistor R5, the sixth resistor R6, and the third amplifier U3; the first end of the fifth resistor R5 is connected to the output terminal of the first amplifier U1 and the positive input terminal of the third amplifier U3, and the second end of the fifth resistor R5 is connected to the ground terminal in the control module 11.

[0063] The first end of the sixth resistor R6 is connected to the output terminal of the second amplifier U2 and the negative input terminal of the third amplifier U3, and the second end of the sixth resistor R6 is connected to the output terminal of the third amplifier U3.

[0064] The positive power supply terminal of the third amplifier U3 is connected to the power supply terminal, and the negative power supply terminal of the third amplifier U3 is connected to the ground terminal in the control module.

[0065] For example, the circuit structure diagram of the subtractor is shown in Figure 6. The third amplifier U3 is the core operational amplifier of the subtraction circuit. Since the ground bounce voltage is usually in the tens to hundreds of mV range, the accuracy and output range of the operational amplifier are required to be high. Therefore, the NCS2003x series operational amplifier can be selected, which is slightly more expensive than general low-cost operational amplifiers such as LM2904.

[0066] ① In the subtraction circuit on the right, R6 (Rf feedback resistor) and R5 are both set as the connection resistors between the subtractor and the second comparator module, and are twice the connection resistors between the subtractor and the second comparator module. This allows the subtraction circuit to directly have a 2x amplification function, and its transfer characteristic is: Ud = (Vin1 – Vin2) × 2. That is, Ud is the ground bounce voltage value of the ground terminal in the control module.

[0067] ②Although the lower end of R4 is directly connected to other grounding points outside the blower control circuit through the vehicle wiring harness, due to the large resistance of R4, there is no risk of increasing the common-mode interference path and differential-mode return path, which can ensure that the EMC immunity of the blower control circuit itself is not affected.

[0068] ③ Since the voltage divider resistors are selected to be of equal value, the voltage at the measurement points is approximately 5 to 7V, which allows the operational amplifier on the blower control circuit board to correctly acquire the difference value without being affected by the input dead zone.

[0069] Example 7

[0070] In one possible embodiment, based on any one of the embodiments of embodiment one, embodiment two, embodiment three, embodiment four, embodiment five, and embodiment six, the circuit structure diagram of the calculation module in embodiment one of this application is shown in Figure 7, including: a seventh resistor R7, an eighth resistor R8, and a fourth amplifier U4;

[0071] The first end of the seventh resistor R7 is connected to the output terminal of the control module 11 and the positive input terminal of the fourth amplifier U4, and the second end of the seventh resistor R7 is connected to the ground terminal in the control module 11.

[0072] The first end of the eighth resistor R8 is connected to the output terminal of the third amplifier U3 and the negative input terminal of the fourth amplifier U4, and the second end of the eighth resistor R8 is connected to the output terminal of the fourth amplifier U4.

[0073] The positive power supply terminal of the fourth amplifier U4 is connected to the power supply terminal, and the negative power supply terminal of the fourth amplifier U4 is connected to the ground terminal in the control module 11.

[0074] In the calculation module, the "ground bounce voltage" is subtracted from the "initial control voltage, such as 3V," so that the initial control voltage is no longer a constant value, such as 3V, but a real-time changing "initial control voltage - ground bounce voltage." For the blower control circuit that uses the overall GND as a reference, its input voltage becomes "initial control voltage (target voltage - ground bounce voltage) + ground bounce voltage," thus ensuring that the actual control signal it receives is a stable "target control voltage," resolving the interference from the ground bounce voltage.

[0075] Example 8

[0076] In one possible embodiment, based on any of the embodiments in Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, Embodiment 5, Embodiment 6, and Embodiment 7, the control module 11 in Embodiment 1 of this application may include:

[0077] Fifth amplifier U5, at least a first-order RC circuit, ninth resistor R9;

[0078] The positive input terminal of the fifth amplifier U5 is connected to the output terminal of at least a first-order RC circuit; the negative input terminal of the fifth amplifier U5 is connected to the output terminal of the fifth amplifier U5, and the output terminal of the fifth amplifier U5 outputs the initial control voltage; the first terminal of the ninth resistor R9 is connected to the input terminal of at least a first-order RC circuit, and the second terminal of the ninth resistor R9 is grounded.

[0079] In the control module of this embodiment, the ninth resistor R9 is used to provide grounding protection for the control module 11. The control module 11 in this embodiment generates an initial control voltage based on the input command voltage. The input command voltage can be a PWM signal. The PWM signal is filtered by at least one-order RC circuit, and the PWM signal is converted into a continuous voltage signal with an amplitude equal to the DC average value of the PWM signal voltage. After the operational amplifier U5 follows the circuit to adjust the output impedance, the initial control voltage is obtained. As shown in the structural diagram of the control module in Figure 2, the control voltage input to the control module in Figure 2 is MCU_PWM_IN. This control voltage represents the voltage controlling the blower control circuit. It can be a PWM signal. After being filtered by a third-order RC circuit as shown in Figure 2, the PWM signal is converted into a continuous voltage signal, and after the operational amplifier adjusts the output impedance, the initial control voltage is generated. For example, if the voltage input to the control module is 5V, and the required initial control voltage is 3V, the input voltage can be set to a PWM signal with a voltage of 10kHz / duty cycle = 60%. At this time, the initial control voltage value Target_OA_OUT = 3V can be calculated.

[0080] Example 9

[0081] This application also provides an electronic device that can be configured on the end side of a vehicle (such as a new energy vehicle). The device includes at least one processor and a memory communicatively connected to the at least one processor. It is connected to a blower control circuit provided in any embodiment of this application. The memory can identify at least one circuit parameter output by the blower control circuit, and the circuit parameter is executed by the at least one processor.

[0082] Optionally, the aforementioned physical devices may also include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, input units such as a keyboard, etc., and optional user interfaces may also include USB interfaces, card reader interfaces, etc. The network interface may optionally include standard wired interfaces, wireless interfaces (such as Wi-Fi interfaces), etc.

[0083] Those skilled in the art will understand that the physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0084] Based on the aforementioned electronic equipment, this application also provides a vehicle, which may specifically include: a blower control circuit as shown in Figure 1 or the aforementioned electronic equipment. This vehicle may specifically be a new energy vehicle or a traditional vehicle, etc.

[0085] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platform, or it can be implemented by hardware. Compared with the prior art, the blower control circuit in this embodiment includes: a control module, a comparison module, a calculation module, and a speed regulation module; the control module is used to generate an initial control voltage according to the command voltage, and the speed regulation module activates the blower according to the initial control voltage; the comparison module is used to obtain the comparison result between the target voltage value of the ground terminal in the control module and the zero-point potential voltage value, the comparison result representing the ground spring voltage value of the ground terminal in the control module; the calculation module is used to adjust the initial control voltage according to the comparison result to generate the target control voltage; the speed regulation module is used to activate the blower according to the target control voltage. Since the initial control voltage output by the control module may be affected by the ground bounce voltage, the technical solution of this application establishes a comparison module. The comparison module compares the potential rise of the ground terminal in the control module relative to the zero point potential. The command voltage is adjusted in the calculation module so that the target control voltage generated after adjustment is not affected by the ground bounce voltage. The target control voltage output to the speed control module can meet the requirements of controlling the blower, and ultimately the air volume generated by the blower meets the user's needs.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A blower control circuit, comprising: Control module, comparison module, calculation module, and speed regulation module; The control module is used to generate an initial control voltage based on the command voltage; The comparison module is used to obtain the comparison result between the target voltage value of the grounding terminal in the control module and the zero-point potential voltage value. The comparison result represents the ground bounce voltage value of the grounding terminal in the control module. The calculation module is used to adjust the initial control voltage based on the comparison result and generate a target control voltage. The speed control module is used to activate the blower according to the target control voltage.

2. The blower control circuit according to claim 1, wherein, The comparison module includes: a first comparison module, a second comparison module, and a subtractor; The first comparison module is used to obtain the intermediate potential value between the power supply voltage value at the power supply terminal and the target voltage value at the ground terminal in the control module, as the first potential value; The second comparison module is used to obtain the intermediate potential value between the power supply voltage value at the power supply terminal and the zero-point potential voltage value, as the second potential value; The subtractor is used to calculate the potential difference between the first potential value and the second potential value. The potential difference is used to represent the comparison result between the target voltage value of the ground terminal in the control module and the zero-point potential voltage value.

3. The blower control circuit according to claim 2, wherein, The comparison module further includes: an amplifier circuit; The amplifier circuit is used to amplify the potential difference value to generate a target potential difference value, which is equal to the comparison result between the target voltage value of the ground terminal in the control module and the zero-point potential voltage value.

4. The blower control circuit according to claim 2 or 3, wherein, The first comparison module includes: A first resistor, a second resistor, and a first amplifier, wherein the first resistor and the second resistor have the same resistance value; The first resistor and the second resistor are connected in series between the ground terminal and the power supply terminal in the control module; The positive input terminal of the first amplifier is used to read the potential value between the first resistor and the second resistor; The negative input terminal of the first amplifier is connected to the output terminal of the first amplifier; The positive power supply terminal of the first amplifier is connected to the power supply terminal, and the negative power supply terminal of the first amplifier is connected to the ground terminal in the control module.

5. The blower control circuit according to any one of claims 2 to 4, wherein, The second comparison module includes: A third resistor, a fourth resistor, and a second amplifier, wherein the third resistor and the fourth resistor have the same resistance value; The third resistor and the fourth resistor are connected in series between the zero-point potential terminal and the power supply terminal, and the zero-point potential terminal is used to provide the zero-point potential voltage value. The positive input terminal of the second amplifier is used to read the potential value between the third resistor and the fourth resistor; The negative input terminal of the second amplifier is connected to the output terminal of the second amplifier; The positive power supply terminal of the second amplifier is connected to the power supply terminal, and the negative power supply terminal of the second amplifier is connected to the ground terminal in the control module.

6. The blower control circuit according to any one of claims 2 to 5, wherein, The subtractor includes: The fifth resistor, the sixth resistor, and the third amplifier; The first end of the fifth resistor is connected to the output terminal of the first amplifier and the positive input terminal of the third amplifier, and the second end of the fifth resistor is connected to the ground terminal in the control module. The first end of the sixth resistor is connected to the output terminal of the second amplifier and the negative input terminal of the third amplifier, and the second end of the sixth resistor is connected to the output terminal of the third amplifier. The positive power supply terminal of the third amplifier is connected to the power supply terminal, and the negative power supply terminal of the third amplifier is connected to the ground terminal in the control module.

7. The blower control circuit according to any one of claims 1 to 6, wherein, The computing module includes: The seventh resistor, the eighth resistor, and the fourth amplifier; The first end of the seventh resistor is connected to the output terminal of the control module and the positive input terminal of the fourth amplifier, and the second end of the seventh resistor is connected to the ground terminal in the control module. The first end of the eighth resistor is connected to the output terminal of the third amplifier and the negative input terminal of the fourth amplifier, and the second end of the eighth resistor is connected to the output terminal of the fourth amplifier. The positive power supply terminal of the fourth amplifier is connected to the power supply terminal, and the negative power supply terminal of the fourth amplifier is connected to the ground terminal in the control module.

8. The blower control circuit according to any one of claims 1 to 7, wherein, The control module includes: Fifth amplifier, at least a first-order RC circuit, ninth resistor; The positive input terminal of the fifth amplifier is connected to the output terminal of the at least first-order RC circuit; The negative input terminal of the fifth amplifier is connected to the output terminal of the fifth amplifier, and the output terminal of the fifth amplifier outputs the initial control voltage. The first end of the ninth resistor is connected to the input terminal of the at least first-order RC circuit, and the second end of the ninth resistor is grounded.

9. An electronic device comprising a blower control circuit as described in any one of claims 1-8.

10. A vehicle, wherein the vehicle is equipped with the device as claimed in any one of claims 1-8, or the electronic device as claimed in claim 9.

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