Motor speed regulation control circuit and sunshade curtain

Abstract

The invention discloses a motor speed regulation control circuit and a sunshade curtain. The circuit is used for respectively adjusting the positions of two sunshade curtains in an automobile, and comprises a control module, a first rotating speed adjusting module, a second rotating speed adjusting module, a first driving module, a second driving module, a first Hall acquisition module and a second Hall acquisition module, the first driving module is used for driving the rotation direction and rotation turns of the first motor according to the first position control signal and controlling the rotation speed of the first motor according to the first rotation speed control signal; the second driving module is used for driving the rotation direction and rotation turns of the second motor according to the second position control signal and controlling the rotation speed of the second motor according to the second rotation speed control signal; the first Hall acquisition module is used for acquiring a first feedback signal when the first motor works; and the second Hall acquisition module is used for acquiring a second feedback signal when the second motor works. The control flexibility of the two motors connected with the sunshade curtain can be improved, and the individual requirements of users are effectively met.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology, and in particular to a motor speed control circuit and a sunshade curtain. Background Technology

[0002] With the rapid development of intelligent technology, intelligent automatic control technology has been widely applied. For example, in luxury cars, the sunshade installed on the panoramic sunroof can be intelligently controlled to adjust the perceived level of the outside sky for passengers inside the vehicle. Currently, the commonly used solution is to adjust the position of the sunshade using a motor, thereby changing the degree of opening of the panoramic sunroof.

[0003] However, in practical use, different users have different needs for the sunshade. Some passengers want to open the sunshade, while others do not. Furthermore, the sunshade's movement speed during adjustment is fixed, failing to meet the varying speed requirements of specific users. For example, some passengers may prefer the sunshade to open slowly to gradually adapt to changes in light, while others prefer it to open quickly for immediate access to the outside view. In other words, current technology offers limited control flexibility for sunshades, failing to effectively meet users' personalized needs. Summary of the Invention

[0004] This invention provides a motor speed control circuit to solve the problem that sunshade curtains have low control flexibility and cannot effectively meet users' personalized needs.

[0005] According to one aspect of the present invention, a motor speed control circuit is provided for adjusting the positions of two sunshades in a car respectively; the motor speed control circuit includes: a control module, a first speed adjustment module, a second speed adjustment module, a first drive module, a second drive module, a first Hall effect sensor module, and a second Hall effect sensor module;

[0006] The control module is connected to the communication module and is used to output a first position control signal, a second position control signal, a first speed adjustment signal and a second speed adjustment signal according to the position adjustment signal sent by the communication module.

[0007] The first speed adjustment module is connected to the control module and is used to generate a first speed control signal based on the first speed adjustment signal; the second speed adjustment module is connected to the control module and is used to generate a second speed control signal based on the second speed adjustment signal.

[0008] The input terminal of the first drive module is connected to the control module, the control terminal of the first drive module is connected to the first speed adjustment module, and the output terminal of the first drive module is connected to the first motor. It is used to drive the rotation direction and number of rotations of the first motor according to the first position control signal, and to control the speed of the first motor according to the first speed control signal.

[0009] The input terminal of the second drive module is connected to the control module, the control terminal of the second drive module is connected to the second speed adjustment module, and the output terminal of the second drive module is connected to the second motor. It is used to drive the rotation direction and number of rotations of the second motor according to the second position control signal, and to control the speed of the second motor according to the second speed control signal.

[0010] The input terminal of the first Hall sensor module is connected to the first motor, and the output terminal of the first Hall sensor module is connected to the control module, for acquiring the first feedback signal when the first motor is working; the control module adjusts the first position control signal and the first speed adjustment signal according to the first feedback signal.

[0011] The input terminal of the second Hall sensor module is connected to the second motor, and the output terminal of the second Hall sensor module is connected to the control module for acquiring the second feedback signal when the second motor is working; the control module adjusts the second position control signal and the second speed adjustment signal according to the second feedback signal.

[0012] According to another aspect of the present invention, a sunshade curtain is provided, including the motor speed control circuit described in any embodiment of the present invention.

[0013] The technical solution of this invention, through a drive module combined with two speed adjustment modules (a first speed adjustment module and a second speed adjustment module), two Hall effect acquisition modules (a first Hall effect acquisition module and a second Hall effect acquisition module), and two drives (a first drive module and a second drive module), adjusts the stroke of two sunshades connected to two motors (a first motor and a second motor), thereby enabling the adjustment of the movement speed of the sunshades by the two motors during the adjustment of the sunshade's position. Further, the control module receives the position adjustment signal output by the communication module and outputs a first position control signal, a second position control signal, a first speed adjustment signal, and a second speed adjustment signal based on the received position adjustment signal. The two drive modules can obtain the operating status of the two motors from the two Hall effect acquisition modules and switch the conduction state of the control terminal of the switching control module, thereby controlling the output signals of the two speed adjustment modules. The technical solution provided by this invention enables the sunshade to achieve different opening and closing degrees and speed switching according to the needs of different users. Therefore, this invention can improve the control flexibility of the two motors connected to the sunshade and effectively meet the personalized needs of users.

[0014] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a motor speed control circuit provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention;

[0020] Figure 5 A timing diagram for forward rotation of a motor is provided as an embodiment of the present invention;

[0021] Figure 6 A timing diagram for motor reversal provided in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] Figure 1 This is a schematic diagram of a motor speed control circuit provided in an embodiment of the present invention. This embodiment can be applied to adjusting the sunshade of an electric vehicle. Figure 1As shown, the motor speed control circuit includes: a control module 110, a first speed adjustment module 131, a second speed adjustment module 132, a first drive module 121, a second drive module 122, a first Hall effect sensor acquisition module 165, and a second Hall effect sensor acquisition module 166. The control module 110 is connected to the communication module 140 and is used to output a first position control signal, a second position control signal, a first speed adjustment signal, and a second speed adjustment signal based on the position adjustment signal sent by the communication module 140. The first speed adjustment module 131 is connected to the control module 110 and is used to generate a first speed control signal based on the first speed adjustment signal; the second speed adjustment module 132 is connected to the control module 110 and is used to generate a second speed control signal based on the second speed adjustment signal. The input terminal of the first drive module 121 is connected to the control module 110, the control terminal of the first drive module 121 is connected to the first speed adjustment module 131, and the output terminal of the first drive module 121 is connected to the first motor 151; it is used to drive the rotation direction and number of rotations of the first motor according to the first position control signal, and to control the speed of the first motor according to the first speed control signal. The input terminal of the second drive module 122 is connected to the control module 110, the control terminal of the second drive module 122 is connected to the second speed adjustment module 132, and the output terminal of the second drive module 122 is connected to the second motor 152. It is used to drive the rotation direction and number of rotations of the second motor 152 according to the second position control signal, and to control the speed of the second motor 152 according to the second speed control signal. The input terminal of the first Hall effect sensor module 165 is connected to the first motor 151, and the output terminal of the first Hall effect sensor module 165 is connected to the control module 110. It is used to acquire the first feedback signal when the first motor 151 is working; the control module 110 adjusts the first position control signal and the first speed adjustment signal according to the first feedback signal. The input terminal of the second Hall effect sensor module 166 is connected to the second motor 152, and the output terminal of the second Hall effect sensor module 166 is connected to the control module 110. It is used to acquire the second feedback signal when the second motor 152 is working; the control module 110 adjusts the second position control signal and the second speed adjustment signal according to the second feedback signal.

[0026] Specifically, the communication module 140 refers to the module that interacts with the user terminal or the vehicle controller. The communication module 140 can send position adjustment signals to the control module 110. The position adjustment signal is a signal used to indicate the target position to which the sunshade should move. The control module 110 is the core control part of the motor speed control circuit, responsible for receiving the position adjustment signal from the communication module and outputting corresponding control commands according to the position adjustment signal to achieve precise adjustment of the sunshade. For example, the control module 110 can output a first position control signal, a second position control signal, a first speed adjustment signal, and a second speed adjustment signal. The first position control signal can instruct the first drive module 121 to operate, causing it to control the rotation of the first motor 151. The second position control signal can instruct the second drive module 122 to operate, causing it to control the rotation of the second motor 152. The position control signal may include information on the direction of motor rotation and information on the number of rotations of the motor. For example, the control module 110 determines the direction of rotation and the number of revolutions of the first motor 151 and the second motor 152 based on the position adjustment signal, and then sends a first position control signal to the first drive module 121 and a second position control signal to the second drive module 122. The first speed adjustment signal instructs the first speed adjustment module 131 to operate, causing it to send a first speed control signal to the first drive module 121. The second speed adjustment signal instructs the second speed adjustment module 132 to operate, causing it to send a second speed control signal to the second drive module 122. The first speed control signal refers to the signal sent by the first speed adjustment module 131 to the first drive module 121 based on the first speed adjustment signal, used to instruct the first drive module 121 to operate, thereby adjusting the speed of the first motor 151. The second speed control signal refers to the signal sent by the second speed adjustment module 132 to the second drive module 122 based on the second speed adjustment signal, used to instruct the second drive module 122 to operate, thereby adjusting the speed of the second motor 152. For example, the first speed adjustment signal and the second speed adjustment signal can be pulse width modulation (PWM) signals; the first speed control signal and the second speed control signal can be PWM signals obtained by amplifying the power of the speed adjustment signal. Furthermore, the first speed adjustment signal and the second speed adjustment signal can also be square wave signals or DC signals, etc. The first Hall effect acquisition module 165 and the second Hall effect acquisition module 166 both refer to electronic components that utilize the Hall effect principle for signal detection, typically used to measure the speed and position of a motor. The first Hall effect acquisition module 165 can acquire the operating status of the first motor 151 in real time, including feedback information such as speed and position, and convert it into an electrical signal output to the control module 110.The second Hall effect acquisition module 166 can acquire the working status of the second motor 152 in real time, including feedback information such as speed and position, and convert it into an electrical signal to be output to the control module 110.

[0027] In some embodiments, the first position control signal refers to the control signal issued by the control module 110 for controlling the rotation direction and number of rotations of the first motor 151. The first drive module 121 can output a first speed control signal based on the first position signal and the speed adjustment signal. The first speed control signal is a signal used to adjust the speed of the first motor 151. For example, the first speed control signal is a pulse width modulation signal. The second position control signal refers to the control signal issued by the control module 110 for controlling the rotation direction and number of rotations of the second motor 152. The second drive module 122 can output a second speed control signal based on the second position signal and the speed adjustment signal. The second speed control signal is a signal used to adjust the speed of the second motor 152. For example, the second speed control signal is a pulse width modulation signal.

[0028] In this embodiment of the invention, the user sends a position adjustment signal to the control module 110 via the communication module. The control module 110, based on the position adjustment signal, sends a first position control signal to the first drive module 121 and a second drive module 122, respectively, driving the first motor 151 and the second motor 152 to start working. Simultaneously, the control module 110 sends a first speed adjustment signal to the first speed adjustment module 131 and a second speed adjustment signal to the second speed adjustment module 132, based on the position adjustment signal. The first speed adjustment module 131 generates a first speed control signal based on the first speed adjustment signal and sends it to the first drive module 121. The second speed adjustment module 132 generates a second speed control signal based on the second speed adjustment signal and sends it to the second drive module 122. The first drive module 121 controls the speed of the first motor 151 based on the first speed control signal. The second drive module 122 controls the speed of the second motor 152 based on the second speed control signal. The first motor 151 and the second motor 152 can respectively drive the two sunshades to move, allowing different users to adjust the closing degree and moving speed of the sunshades according to their own needs. The first Hall effect sensor module 165 and the second Hall effect sensor module 166 can respectively acquire signals such as the rotational speed, direction of rotation, and rotor position of the first motor 151 and the second motor 152, and convert these signals into electrical signals, which are then transmitted to the control module 110 to achieve negative feedback. The control module 110 further adjusts its output first position control signal, second position control signal, first speed adjustment signal, and second speed adjustment signal based on these signals.

[0029] The technical solution of this invention, through a drive module combined with two speed adjustment modules (a first speed adjustment module and a second speed adjustment module), two Hall effect acquisition modules (a first Hall effect acquisition module and a second Hall effect acquisition module), and two drives (a first drive module and a second drive module), adjusts the stroke of two sunshades connected to two motors (a first motor and a second motor), thereby enabling the adjustment of the movement speed of the sunshades by the two motors during the adjustment of the sunshade's position. Further, the control module receives the position adjustment signal output by the communication module and outputs a first position control signal, a second position control signal, a first speed adjustment signal, and a second speed adjustment signal based on the received position adjustment signal. The two drive modules can obtain the operating status of the two motors from the two Hall effect acquisition modules and switch the conduction state of the control terminal of the switching control module, thereby controlling the output signals of the two speed adjustment modules. The technical solution provided by this invention enables the sunshade to achieve different opening and closing degrees and speed switching according to the needs of different users. Therefore, this invention can improve the control flexibility of the two motors connected to the sunshade and effectively meet the personalized needs of users.

[0030] Figure 2 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention. Based on the above embodiments, alternatively, such as... Figure 2 As shown, the first drive module 121 includes: a first resistor R1, a second resistor R2, a first switch T1, a second switch T2, a first relay J1, and a second relay J2. The first resistor R1 is connected between the first output terminal of the control module 110 and the control terminal of the first switch T1; the first relay J1 includes a first coil L1, which is connected between the first terminal of the first switch T1 and the first DC power supply VCC1; the fixed terminal of the first relay J1 is connected to the first terminal of the first motor 151; the first selection terminal of the first relay J1 is connected to the output terminal of the first speed adjustment module 131; and the second selection terminal of the first relay J1 is connected to the second selection terminal of the second relay J2; the second terminal of the first switch T1 is connected to the ground terminal. The second resistor R2 is connected between the second output terminal of the control module 110 and the control terminal of the second switch T2; the second relay J2 includes a second coil L2, which is connected between the first terminal of the second switch T2 and the first DC power supply VCC1; the fixed terminal of the second relay J2 is connected to the second terminal of the first motor 151; the first selection terminal of the second relay J2 is connected to the output terminal of the first speed regulation module 131; and the second selection terminal of the second relay J2 is connected to the second DC power supply VCC2; the second terminal of the second switch T2 is connected to the ground terminal.

[0031] In this embodiment of the invention, for example, the first output terminal of the control module 110 sends a high-level signal to the control terminal of the first switching transistor T1, and the second output terminal of the control module 110 sends a low-level signal to the control terminal of the second switching transistor T2, turning on the first switching transistor T1 and de-turning off the second switching transistor T2. At this time, the first coil L1 of the first relay J1 is energized, connecting the fixed terminal of the first relay J1 to its first selection terminal, and the first terminal of the first motor 151 receives the first speed control signal sent by the first speed adjustment module 131. The second coil L2 of the second relay J2 is not energized, the fixed terminal of the second relay J2 is connected to its second selection terminal, and the second terminal of the first motor 151 receives a constant DC voltage from the second DC power supply VCC2. During the period when the first output terminal of the control module 110 sends a high-level signal and the second output terminal of the control module 110 sends a low-level signal, the first motor 151 rotates forward, and its rotation speed is adjusted by the first speed control signal. Similarly, if the first output terminal of the control module 110 sends a low-level signal to the control terminal of the first switch transistor T1, and the second output terminal of the control module 110 sends a high-level signal to the control terminal of the second switch transistor T2, the first motor 151 reverses, and its rotation speed is adjusted by the first speed control signal.

[0032] Based on the above embodiments, alternatively, refer to the following: Figure 2 The second drive module 122 includes: a third resistor R3, a fourth resistor, a third switch T3, a fourth switch T4, a third relay J3, and a fourth relay J4. The third resistor R3 is connected between the third output terminal of the control module 110 and the control terminal of the third switch T3; the third relay J3 includes a third coil L3, which is connected between the first terminal of the third switch T3 and the first DC power supply VCC1; the fixed terminal of the third relay J3 is connected to the first terminal of the second motor 152; the first selection terminal of the third relay J3 is connected to the output terminal of the second speed adjustment module 132; the second selection terminal of the third relay J3 is connected to the second selection terminal of the fourth relay J4; and the second terminal of the third switch T3 is connected to the ground terminal. The fourth resistor is connected between the fourth output terminal of the control module 110 and the control terminal of the fourth switch transistor T4; the fourth relay J4 includes a fourth coil L4, which is connected between the first terminal of the fourth switch transistor T4 and the first DC power supply VCC1; the fixed terminal of the fourth relay J4 is connected to the second terminal of the second motor 152; the first selection terminal of the fourth relay J4 is connected to the output terminal of the second speed adjustment module 132; the second selection terminal of the fourth relay J4 is connected to the second DC power supply VCC2; and the second terminal of the fourth switch transistor T4 is connected to the ground terminal.

[0033] In this embodiment of the invention, the third output terminal of the control module 110 sends a high-level signal to the control terminal of the third switch transistor T3, and the fourth output terminal of the control module 110 sends a low-level signal to the control terminal of the fourth switch transistor T4, turning on the third switch transistor T3 and de-turning off the fourth switch transistor T4. At this time, the third coil L3 of the third relay J3 is energized, connecting the fixed terminal of the third relay J3 to its first selection terminal, and the first terminal of the third motor receives the second speed control signal sent by the second speed regulation module 132. The fourth coil L4 of the fourth relay J4 is not energized, and the fixed terminal of the fourth relay J4 is connected to its second selection terminal, and the second terminal of the second motor 152 receives a constant DC voltage from the second DC power supply VCC2. During the period when the third output terminal of the control module 110 sends a high-level signal and the fourth output terminal of the control module 110 sends a low-level signal, the third motor rotates forward, and its rotation speed is adjusted by the third speed control signal. Similarly, if the third output terminal of the control module 110 sends a low-level signal to the control terminal of the third switch T3, and the fourth output terminal of the control module 110 sends a high-level signal to the control terminal of the fourth switch T4, the third motor reverses, and its rotation speed is adjusted by the third speed control signal.

[0034] Figure 3 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention. Based on the above embodiments, alternatively, such as... Figure 3As shown, the first speed regulation module 131 includes: a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth switching transistor T5, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11. The eleventh resistor R11 is connected between the fifth output terminal of the control module 110 and the control terminal of the first transistor Q1. The seventh resistor R7 is connected between the first terminal of the eighth resistor R8 and the third DC power supply VCC3; the second terminal of the eighth resistor R8 is connected to the first terminal of the first transistor Q1; and the second terminal of the first transistor Q1 is connected to ground. The control terminal of the second transistor Q2 is connected to the first terminal of the eighth resistor R8, the first terminal of the second transistor Q2 is connected to the third DC power supply VCC3, and the second terminal of the second transistor Q2 is connected to the first terminal of the ninth resistor R9; the tenth resistor R10 is connected between the second terminal of the ninth resistor R9 and ground. The control terminal of the third transistor Q3 is connected to the second terminal of the ninth resistor R9. The first terminal of the third transistor Q3 is connected to the third DC power supply VCC3. The second terminal of the third transistor Q3 is connected to the first terminal of the fourth transistor Q4. The control terminal of the fourth transistor Q4 is connected to the second terminal of the ninth resistor R9, and the second terminal of the fourth transistor Q4 is connected to the ground terminal. The first terminal of the fifth switch T5 is connected to the fourth DC power supply VCC4. The second terminal MS1 of the fifth switch T5 is connected to the control terminal of the first drive module 121. The fifth resistor R5 is connected between the ground terminal and the second terminal MS1 of the fifth switch T5.

[0035] In this embodiment of the invention, the first transistor Q1 and the second transistor Q2 form a push-pull circuit. For example, the control module 110 sends a PWM signal to the first speed regulation module 131. When the control terminal of the first transistor Q1 is high, the first transistor Q1 is turned on, and the second transistor Q2 is turned off. When the second transistor Q2 is off, the third transistor Q3 and the fourth transistor Q4 are also turned off. At this time, the control terminal of the fifth switch T5 receives a low level input, and the fifth switch T5 is turned off. When the fifth switch T5 is off, the DC voltage output from the fourth DC power supply VCC4 cannot be transmitted to the control terminal of the first drive module 121 through the second terminal MS1 of the fifth switch T5; that is, the second terminal MS1 of the fifth switch T5 outputs a low level. When the control terminal of the first transistor Q1 is low, the first transistor Q1 is turned off, and the second transistor Q2 is turned on. When the second transistor Q2 is turned on, the third transistor Q3 and the fourth transistor Q4 are also turned on. At this time, the control terminal of the fifth switch T5 receives a high level input, and the fifth switch T5 is turned on. After the fifth switch T5 is turned on, the DC voltage output from the fourth DC power supply VCC4 is transmitted to the control terminal of the first drive module 121 through the second terminal MS1 of the fifth switch T5, that is, the output of the second terminal MS1 of the fifth switch T5 is a high level. The eleventh resistor R11 can protect the control terminal of the first transistor Q1 from being damaged by large current. The control terminal of the second transistor Q2 is connected to the connection point of the seventh resistor R7 and the eighth resistor R8, which can prevent it from being damaged by the large current flowing from the third DC power supply VCC3. The control terminals of the third transistor Q3 and the fourth transistor Q4 are both connected to the connection point of the ninth resistor R9 and the tenth resistor R10, which can prevent the components from being damaged due to excessive current.

[0036] Based on the above embodiments, continue to refer to Figure 3Optionally, the second speed regulation module 132 includes: a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a sixth switching transistor T6, a sixth resistor R6, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a sixteenth resistor R16. The sixteenth resistor R16 is connected between the sixth output terminal of the control module 110 and the control terminal of the fifth transistor Q5; the twelfth resistor R12 is connected between the first terminal of the thirteenth resistor R13 and the third DC power supply; the second terminal of the thirteenth resistor R13 is connected to the first terminal of the fifth transistor Q5, and the second terminal of the fifth transistor Q5 is connected to the ground terminal. The control terminal of the sixth transistor Q6 is connected to the first terminal of the thirteenth resistor R13 of the fifth transistor Q5. The first terminal of the sixth transistor Q6 is connected to the third DC power supply VCC3, and the second terminal of the sixth transistor Q6 is connected to the first terminal of the fourteenth resistor R14. The fifteenth resistor R16 is connected between the second terminal of the fourteenth resistor R14 and the ground terminal. The control terminal of the seventh transistor Q7 is connected to the second terminal of the fourteenth resistor R14. The first terminal of the seventh transistor Q7 is connected to the third DC power supply VCC3, and the second terminal of the seventh transistor Q7 is connected to the first terminal of the eighth transistor Q8. The control terminal of the eighth transistor Q8 is connected to the second terminal of the fourteenth resistor R14, and the second terminal of the eighth transistor Q8 is connected to the ground terminal. The control terminal of the sixth switch T6 is connected to the second terminal of the seventh transistor Q7. The first terminal of the sixth switch T6 is connected to the fourth DC power supply VCC4, and the second terminal of the sixth switch Q6 is connected to the control terminal of the second drive module 122. The sixth resistor R6 is connected between the ground terminal and the second terminal of the sixth switch T6. In this embodiment of the invention, the fifth transistor Q5 and the sixth transistor Q6 form a push-pull circuit. For example, the control module 110 sends a PWM signal to the second speed regulation module 132. When the control terminal of the fifth transistor Q5 is high, the fifth transistor Q5 is turned on, and the sixth transistor Q6 is turned off. When the sixth transistor Q6 is off, the seventh transistor Q7 and the eighth transistor Q8 are also turned off. At this time, the control terminal of the sixth switch T6 receives a low level input, and the sixth switch T6 is turned off. When the sixth switch T6 is off, the DC voltage output from the fourth DC power supply VCC4 cannot be transmitted to the control terminal of the second drive module 122 through the second terminal MS2 of the sixth switch T6; that is, the second terminal MS2 of the sixth switch T6 outputs a low level. When the control terminal of the fifth transistor Q5 is low, the fifth transistor Q5 is turned off, and the sixth transistor Q6 is turned on. When transistor Q6 is turned on, transistors Q7 and Q8 are also turned on. At this time, the control terminal of the sixth switch T6 receives a high level input, and the sixth switch T6 is turned on. After the sixth switch T6 is turned on, the DC voltage output from the fourth DC power supply VCC4 is transmitted to the control terminal of the second drive module 122 through the second terminal MS2 of the sixth switch T6, that is, the output of the second terminal MS2 of the sixth switch T6 is a high level.The sixteenth resistor, R16, protects the control terminal of the fifth transistor, Q5, from damage caused by excessive current. The control terminal of the sixth transistor, Q6, is connected to the junction of the twelfth and thirteenth resistors, R12, preventing damage from the large current flowing from the third DC power supply, VCC3. The control terminals of the seventh and eighth transistors, Q7 and Q8, are both connected to the junction of the fourteenth and fifteenth resistors, R14, to prevent damage due to excessive current.

[0037] The technical solution of this invention amplifies the first speed adjustment signal sent by the control module through a first speed adjustment module to obtain a first speed control signal; and amplifies the second speed adjustment signal sent by the control module through a second speed adjustment module to obtain a second speed control signal. The first speed control signal is used to control the first drive module to adjust the speed of the first motor, and the second speed control signal is used to control the second drive module to adjust the speed of the second motor. By amplifying the first speed signal and the second speed adjustment signal, this invention can achieve precise control of the speeds of the first motor and the second motor respectively, ensuring stable operation of both motors.

[0038] Figure 4 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention. Based on the above embodiments, alternatively, such as... Figure 4As shown, the first Hall effect acquisition module 165 includes: a first Hall element 161, a second Hall element 162, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a second capacitor C2C1, a second capacitor, a third capacitor C3, a fourth capacitor C4, a first diode D1, and a second diode D2. The input terminal of the first Hall element 161 is connected to the first output terminal of the first motor 151, and the output terminal of the first Hall element 161 is connected to the cathode of the first diode D1; the seventeenth resistor R17 is connected between the anode of the first diode D1 and the first input terminal of the control module 110; the eighteenth resistor R18 is connected between the anode of the first diode D1 and the fifth DC power supply VCC5; the second capacitor C2C1 is connected between the cathode of the first diode D1 and the ground terminal; and the second capacitor is connected between the first input terminal and the ground terminal of the control module 110. The input terminal of the second Hall element 162 is connected to the second output terminal of the first motor 151, and the output terminal of the second Hall element 162 is connected to the cathode of the second diode D2; the nineteenth resistor R19 is connected between the anode of the second diode D2 and the second input terminal of the control module 110; the twentieth resistor R20 is connected between the anode of the second diode D2 and the fifth DC power supply VCC5; the third capacitor C3 is connected between the cathode of the second diode D2 and the ground terminal; and the fourth capacitor C4 is connected between the second input terminal of the control module 110 and the ground terminal.

[0039] Specifically, a Hall element refers to a sensor that operates based on the Hall effect principle. A Hall element can detect the speed of a motor and the position of its rotor. For example, a Hall element can be a Hall sensor.

[0040] In this embodiment of the invention, when the first motor 151 rotates, the first Hall element 161 outputs a corresponding Hall signal. The first capacitor C1 and the second capacitor C2 are used to filter out noise in the Hall signal. The first diode D1 is a reverse-connection protection diode, preventing the fifth DC power supply VCC5 and the first Hall element 161 from being connected in reverse, thus avoiding damage to the components. The seventeenth resistor R17 is used to limit the current of the acquired Hall signal, preventing damage to the control module 110 due to the current exceeding the preset current value. The DC voltage output from the fifth DC power supply VCC5 is connected to the first Hall element 161 through the eighteenth resistor R18. The fifth DC power supply VCC5 is the voltage output by a voltage regulator chip and will not fluctuate due to external environmental factors. Since the Hall signal acquired by the first Hall acquisition module 161 is counted by the software program inside the control module 110, fluctuations in the fifth DC power supply VCC5 will cause changes in the acquired Hall signal. If the voltage amplitude of the acquired Hall signal exceeds the set value in the control module 110, a missed count will occur. Therefore, by setting a stable output voltage value for the fifth DC power supply VCC5, ensuring that its output voltage does not fluctuate due to external interference, the control module 110 can better identify the Hall signal acquired by the first Hall acquisition module 165. Similarly, when the first motor 151 rotates, the second Hall element 162 outputs a corresponding Hall signal. The third capacitor C3 and the fourth capacitor C4 are used to filter out noise in the Hall signal. The second diode D2 is a reverse connection protection diode, which can prevent the fifth DC power supply VCC5 and the second Hall element 162 from being connected in reverse, thus preventing damage to the components. The nineteenth resistor R19 is used to limit the current of the acquired Hall signal, preventing damage to the control module 110 due to the current exceeding the preset current value of the control module 110. The DC voltage output by the fifth DC power supply VCC5 is connected to the second Hall element 162 through the twentieth resistor R20.

[0041] Based on the above embodiments, alternatively, refer to the following: Figure 4The second Hall effect acquisition module 166 includes: a third Hall element 163, a fourth Hall element 164, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a third diode D3, and a fourth diode D4. The input terminal of the third Hall element 163 is connected to the first output terminal of the second motor 152, and the output terminal of the third Hall element 163 is connected to the cathode of the third diode D3; the twenty-first resistor R21 is connected between the anode of the third diode D3 and the third input terminal of the control module 110; the twenty-second resistor R22 is connected between the anode of the third diode D3 and the fifth DC power supply VCC5; the fifth capacitor C5 is connected between the cathode of the third diode D3 and the ground terminal; and the sixth capacitor C6 is connected between the third input terminal of the control module 110 and the ground terminal. The input terminal of the fourth Hall element 164 is connected to the second output terminal of the second motor 152, and the output terminal of the fourth Hall element 164 is connected to the cathode of the fourth diode D4; the twenty-third resistor R23 is connected between the anode of the fourth diode D4 and the fourth input terminal of the control module 110; the twenty-fourth resistor R24 ​​is connected between the anode of the fourth diode D4 and the fifth DC power supply VCC5; the seventh capacitor C7 is connected between the cathode of the fourth diode D4 and the ground terminal; and the eighth capacitor C8 is connected between the fourth input terminal of the control module 110 and the ground terminal.

[0042] In this embodiment of the invention, when the second motor 152 rotates, the third Hall element 163 outputs a corresponding Hall signal. The fifth capacitor C5 and the sixth capacitor C6 are used to filter out noise in the Hall signal. The third diode D3 is a reverse-connection protection diode, which prevents the fifth DC power supply VCC5 and the third Hall element 163 from being connected in reverse, thus preventing damage to the components. The twenty-first resistor R21 is used to limit the current of the acquired Hall signal, preventing damage to the control module 110 due to the current exceeding the preset current value. The DC voltage output from the fifth DC power supply VCC5 is connected to the third Hall element 163 through the twenty-second resistor R22. Similarly, when the second motor 152 rotates, the fourth Hall element 164 outputs a corresponding Hall signal. The seventh capacitor C7 and the eighth capacitor C8 are used to filter out noise in the Hall signal. The fourth diode D4 is a reverse-connection protection diode, which prevents the fifth DC power supply VCC5 and the fourth Hall element 164 from being connected in reverse, thus preventing damage to the components. The twenty-third resistor R23 is used to limit the current of the acquired Hall signal to prevent damage to the control module 110 due to the current exceeding the preset current value. The DC voltage output from the fifth DC power supply VCC5 is connected to the second Hall element 162 through the twenty-fourth resistor R24.

[0043] Figure 5This is a timing diagram for forward rotation of a motor, provided as an embodiment of the present invention. Figure 6 This is a timing diagram for motor reversal provided in an embodiment of the present invention. For example... Figure 5 and Figure 6As shown, the control module 110 determines the rotor direction of the motor based on the rising edge of the acquired Hall signals. Specifically, when the motor rotates forward, the rising edge of the first Hall signal HALLS1 corresponds to the low level of the second Hall signal HALLS2, and the falling edge of the first Hall signal HALLS1 corresponds to the high level of the second Hall signal HALLS2. There is a 45-degree phase difference between the rising edges of the first Hall signal HALLS1 and the second Hall signal HALLS2. Because of this phase difference, the logical operation between the first Hall signal HALLS1 and the second Hall signal HALLS2 allows the determination of whether the motor is rotating forward or backward. When the motor rotates backward, the rising edge of the first Hall signal HALLS1 corresponds to the high level of the second Hall signal HALLS2, and the falling edge of the first Hall signal HALLS1 corresponds to the low level of the second Hall signal HALLS2. There is a 45-degree phase difference between the rising edges of the first Hall signal HALLS1 and the falling edges of the second Hall signal HALLS2. Furthermore, the high level of the Hall signal is set to 1, and the low level to 0. Based on capturing the rising edge of the first Hall signal HALLS1, since there is a phase difference between the first Hall signal HALLS1 and the second Hall signal HALLS2, the rising edge of the first Hall signal HALLS1 can only correspond to either a high level or a low level of the second Hall signal HALLS2. When the control module 110 captures the rising edge of the first Hall signal HALLS1, it determines that when the rising edge of the first Hall signal HALLS1 corresponds to a low level of the second Hall signal HALLS2 (i.e., HALLS1 = 1 & HALLS2 = 0), the logical operation result is 0, thus determining that the motor is rotating forward. When the rising edge of the first Hall signal HALLS1 corresponds to a high level of the second Hall signal HALLS2 (i.e., HALLS1 = 1 & HALLS2 = 1), the logical operation result is 1, thus determining that the motor is rotating in reverse. After determining the motor's running direction, the second Hall signal HALLS2 is used to count the number of motor revolutions, i.e., to count the Hall count. For example, when the motor rotates forward, and the control module 110 detects the falling edge of the second Hall signal HALLS2, the control module 110 performs a Hall increment operation, incrementing the count by one. When the motor rotates in reverse, and the control module 110 detects the falling edge of the second Hall signal HALLS2, the control module 110 performs a Hall decrement operation, decrementing the count by one. The control module 110 then sends a first position control signal and a second position control signal to the first drive module 121 and the second drive module 122, respectively, based on this count value, to adjust the position of the sunshade.In addition, the control module 110 can obtain the motor speed signal through the pulse width of the first Hall signal HALLS1 and the second Hall signal HALLS2, and then send the first speed adjustment signal and the second speed adjustment signal to the first speed adjustment module 131 and the second speed adjustment module 132 respectively to adjust the speed of the sunshade when it moves.

[0044] In other embodiments, the falling edge of the first Hall signal HALLS1 can be used as a reference; or the rising edge or falling edge of the second Hall signal HALLS2 can be used as a reference, and the first Hall signal HALLS1 can be used for counting accordingly. The embodiments of the present invention do not impose any limitations on this.

[0045] The technical solution of this invention involves using a Hall effect sensor to collect feedback signals from the first and second motors during operation and feeding them back to the control module. This allows the control module to adjust the position, direction, and speed of the first and second motors based on their current operating states. This invention ensures that the control module can monitor the actual status of the first and second motors at all times, improving the positioning accuracy and speed precision of the sunshade adjustment, and further enhancing the user experience.

[0046] Figure 7 This is a schematic diagram of another motor speed control circuit provided in an embodiment of the present invention. Based on the above embodiments, alternatively, such as... Figure 7 As shown, the motor speed control circuit further includes: a first protection module 171 and a second protection module 172. The first protection module 171 is connected to the first speed adjustment module 131 and is used to send a first protection signal to the control module 110 based on the first voltage sampling signal collected by the first speed adjustment module 131. The second protection module 172 is connected to the second speed adjustment module 132 and is used to send a second protection signal to the control module 110 based on the second voltage sampling signal collected by the second speed adjustment module 132.

[0047] Specifically, the first protection module 171 refers to the component used to protect the first motor 151 from short circuits. The second protection module 172 refers to the component used to protect the second motor 152 from short circuits. Both the first and second protection modules 171 and 172 can detect abnormal circuit conditions and take corresponding protective measures. For example, the first protection module 171 can generate a first protection signal based on the first voltage sampling signal collected by the first speed regulation module 131 to ensure the safe operation of the motor speed control circuit. The second protection module 172 can generate a second protection signal based on the second voltage sampling signal collected by the second speed regulation module 132 to ensure the safe operation of the motor speed control circuit. The first voltage sampling signal refers to the voltage data extracted by the first protection module 171 from the first speed regulation module 131, used to monitor the operating status of the first motor 151. The second voltage sampling signal refers to the voltage data extracted by the second protection module 172 from the second speed regulation module 132, used to monitor the operating status of the second motor 152.

[0048] In this embodiment of the invention, the control module 110 can respond to the Hall signal fed back by the first Hall acquisition module 165 and adjust the pulse width of its output speed regulation signal. The first voltage sampling signal acquired by the first protection module 171 can reflect the pulse width of the first speed regulation module 131. For example, when the first motor 151 is short-circuited, due to the feedback from the first Hall acquisition module 165, the pulse width of the PWM signal output by the first speed regulation module 131 to the first drive module 121 will become 0, and the voltage sampling signal acquired by the first Hall acquisition module 165 will be at a low level. The control module 110 controls the first speed regulation module 131 and the first drive module 121 to stop working based on this low level.

[0049] Similarly, the control module 110 can respond to the Hall signal fed back by the second Hall acquisition module 166 and adjust the pulse width of its output speed regulation signal. The second voltage sampling signal acquired by the second protection module 172 can reflect the pulse width of the second speed regulation module 132. For example, when the second motor 152 is short-circuited, due to the feedback from the second Hall acquisition module 166, the pulse width of the PWM signal output by the second speed regulation module 132 to the second drive module 122 will become 0, and the voltage sampling signal acquired by the second Hall acquisition module 166 will be low. The control module 110 controls the second speed regulation module 132 and the second drive module 122 to stop working based on this low level.

[0050] Based on the above embodiments, continue to refer to Figure 7Optionally, the first protection module 171 includes: a 25th resistor R25, a 26th resistor R26, a 27th resistor R27, a 28th resistor R28, a 5th diode D5, a 9th capacitor C9, a 10th capacitor C10, and an 11th capacitor C11; the 25th resistor R25 is connected between the first end of the 5th resistor R5 and the first end of the 27th resistor R27; the 26th resistor R26 is connected between the second end of the 5th resistor R5 and the first end of the 28th resistor R28; the 28th resistor R28 is connected between the first end of the 27th resistor R27 and the ground terminal; the second end of the 27th resistor R27 is connected to the 5th input terminal of the control module 110; the 9th capacitor C9 is connected between the 5th input terminal of the control module 110 and the ground terminal; the first end of the 5th diode D5 is connected to the first end of the 5th resistor R5, and the second end of the 5th diode D5 is connected to the second end of the 5th resistor R5; the 10th capacitor C10 is connected between the first end of the 5th diode D5 and the ground terminal; and the 11th capacitor C11 is connected between the second end of the 5th diode D5 and the ground terminal. The second protection module 172 includes: a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, a sixth diode D6, a twelfth capacitor C12, a thirteenth capacitor C13, and a fourteenth capacitor C14; the twenty-ninth resistor R29 is connected between the first end of the sixth resistor R6 and the first end of the thirty-first resistor R31; the thirtieth resistor R30 is connected between the second end of the sixth resistor R6 and the first end of the thirty-second resistor R32; the thirty-second resistor R32 is connected between the first end of the thirty-first resistor R31 and the ground terminal; the second end of the thirty-first resistor R31 is connected to the sixth input terminal of the control module 110; the twelfth capacitor C12 is connected between the sixth input terminal of the control module 110 and the ground terminal; the first end of the sixth diode D6 is connected to the first end of the sixth resistor R6, and the second end of the sixth diode D6 is connected to the second end of the sixth resistor R6; the thirteenth capacitor C13 is connected between the first end of the sixth diode D6 and the ground terminal; and the fourteenth capacitor C14 is connected between the second end of the sixth diode D6 and the ground terminal.

[0051] In this embodiment of the invention, the twenty-fifth resistor R25, the twenty-sixth resistor R26, the twenty-seventh resistor R27, and the twenty-eighth resistor R28 work together to detect the voltage across the fifth resistor R5. When there is no voltage across the fifth resistor R5, the ninth capacitor C9, the tenth capacitor C10, and the eleventh capacitor C11 begin to discharge until the voltage is 0. The first protection module 171 sends a low-level signal to the control module 110. After receiving the low-level signal, the control module 110 controls the first speed adjustment module 131 and the first drive module 121 to stop working. In addition, the fifth diode D5 can be a Zener diode and is connected in parallel with the fifteenth capacitor C15 and the sixteenth capacitor C16. When the voltage across the fifth resistor R5 exceeds the Zener breakdown voltage of the fifth diode D5, the fifth diode D5 quickly conducts, guiding the excess voltage to ground, thereby protecting the circuit. The twenty-ninth resistor R29, the thirtieth resistor R30, the thirty-first resistor R31, and the thirty-second resistor R32 work together to detect the voltage across the sixth resistor R6. When there is no voltage across the sixth resistor R6, the twelfth capacitor C12, the thirteenth capacitor C13, and the fourteenth capacitor C14 begin to discharge until the voltage reaches 0. The second protection module 172 sends a low-level signal to the control module 110. Upon receiving this low-level signal, the control module 110 controls the second speed regulation module 132 and the second drive module 122 to stop operating. Furthermore, the sixth diode D6 can be a Zener diode and is connected in parallel with the seventeenth capacitor C17 and the eighteenth capacitor C18. When the voltage across the sixth resistor R6 exceeds the Zener breakdown voltage of the sixth diode D6, the sixth diode D6 quickly conducts, guiding the excess voltage to ground, thereby protecting the circuit.

[0052] The technical solution of this invention protects the first motor and the second motor respectively through a first protection module and a second protection module, enabling rapid control of the motors to stop when they are short-circuited. This invention effectively prevents overheating and mechanical damage caused by motor short circuits, protects the motors and their drive components, and thus improves the reliability and stability of the motor speed control circuit.

[0053] This invention also provides a sunshade curtain, including the motor speed control circuit provided in any embodiment of this invention. This sunshade curtain can be controlled using the motor speed control circuit provided in any of the above embodiments, and possesses corresponding functional modules and beneficial effects.

[0054] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0055] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A motor speed control circuit, characterized in that, Used to adjust the positions of two sunshades in a car respectively; the motor speed control circuit includes: a control module, a first speed adjustment module, a second speed adjustment module, a first drive module, a second drive module, a first Hall sensor acquisition module, and a second Hall sensor acquisition module; The control module is connected to the communication module and is used to output a first position control signal, a second position control signal, a first speed adjustment signal and a second speed adjustment signal according to the position adjustment signal sent by the communication module. The first speed adjustment module is connected to the control module and is used to generate a first speed control signal based on the first speed adjustment signal; the second speed adjustment module is connected to the control module and is used to generate a second speed control signal based on the second speed adjustment signal. The input terminal of the first drive module is connected to the control module, the control terminal of the first drive module is connected to the first speed adjustment module, and the output terminal of the first drive module is connected to the first motor. It is used to drive the rotation direction and number of rotations of the first motor according to the first position control signal, and to control the speed of the first motor according to the first speed control signal. The input terminal of the second drive module is connected to the control module, the control terminal of the second drive module is connected to the second speed adjustment module, and the output terminal of the second drive module is connected to the second motor. It is used to drive the rotation direction and number of rotations of the second motor according to the second position control signal, and to control the speed of the second motor according to the second speed control signal. The input terminal of the first Hall sensor module is connected to the first motor, and the output terminal of the first Hall sensor module is connected to the control module, for acquiring the first feedback signal when the first motor is working; the control module adjusts the first position control signal and the first speed adjustment signal according to the first feedback signal. The input terminal of the second Hall sensor module is connected to the second motor, and the output terminal of the second Hall sensor module is connected to the control module for acquiring the second feedback signal when the second motor is working; the control module adjusts the second position control signal and the second speed adjustment signal according to the second feedback signal.

2. The motor speed control circuit according to claim 1, characterized in that, The first driving module includes: a first resistor, a second resistor, a first switching transistor, a second switching transistor, a first relay, and a second relay; The first resistor is connected between the first output terminal of the control module and the control terminal of the first switching transistor; the first relay includes a first coil, which is connected between the first terminal of the first switching transistor and the first DC power supply; the fixed terminal of the first relay is connected to the first terminal of the first motor; the first selection terminal of the first relay is connected to the output terminal of the first speed regulation module; the second selection terminal of the first relay is connected to the second selection terminal of the second relay; the second terminal of the first switching transistor is connected to the ground terminal. The second resistor is connected between the second output terminal of the control module and the control terminal of the second switching transistor; the second relay includes a second coil, which is connected between the first terminal of the second switching transistor and the first DC power supply; the fixed terminal of the second relay is connected to the second terminal of the first motor; the first selection terminal of the second relay is connected to the output terminal of the first speed regulation module; the second selection terminal of the second relay is connected to the second DC power supply; and the second terminal of the second switching transistor is connected to the ground terminal.

3. The motor speed control circuit according to claim 1, characterized in that, The second drive module includes: a third resistor, a fourth resistor, a third switch, a fourth switch, a third relay, and a fourth relay; The third resistor is connected between the third output terminal of the control module and the control terminal of the third switching transistor; the third relay includes a third coil, which is connected between the first terminal of the third switching transistor and the first DC power supply; the fixed terminal of the third relay is connected to the first terminal of the second motor; the first selection terminal of the third relay is connected to the output terminal of the second speed regulation module; the second selection terminal of the third relay is connected to the second selection terminal of the fourth relay; the second terminal of the third switching transistor is connected to the ground terminal. The fourth resistor is connected between the fourth output terminal of the control module and the control terminal of the fourth switching transistor; the fourth relay includes a fourth coil, which is connected between the first terminal of the fourth switching transistor and the first DC power supply; the fixed terminal of the fourth relay is connected to the second terminal of the second motor; the first selection terminal of the fourth relay is connected to the output terminal of the second speed regulation module; the second selection terminal of the fourth relay is connected to the second DC power supply; and the second terminal of the fourth switching transistor is connected to the ground terminal.

4. The motor speed control circuit according to claim 1, characterized in that, The first speed regulation module includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth switching transistor, a fifth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor; The eleventh resistor is connected between the fifth output terminal of the control module and the control terminal of the first transistor; the seventh resistor is connected between the first terminal of the eighth resistor and the third DC power supply; the second terminal of the eighth resistor is connected to the first terminal of the first transistor; and the second terminal of the first transistor is connected to the ground terminal. The control terminal of the second transistor is connected to the first terminal of the eighth resistor, the first terminal of the second transistor is connected to the third DC power supply, and the second terminal of the second transistor is connected to the first terminal of the ninth resistor; the tenth resistor is connected between the second terminal of the ninth resistor and the ground terminal. The control terminal of the third transistor is connected to the second terminal of the ninth resistor, the first terminal of the third transistor is connected to the third DC power supply, and the second terminal of the third transistor is connected to the first terminal of the fourth transistor; the control terminal of the fourth transistor is connected to the second terminal of the ninth resistor, and the second terminal of the fourth transistor is connected to the ground terminal. The control terminal of the fifth switching transistor is connected to the second terminal of the third transistor, the first terminal of the fifth switching transistor is connected to the fourth DC power supply, and the second terminal of the fifth switching transistor is connected to the control terminal of the first drive module; the fifth resistor is connected between the ground terminal and the second terminal of the fifth switching transistor.

5. The motor speed control circuit according to claim 4, characterized in that, The second speed regulation module includes: a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a sixth switching transistor, a sixth resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor; The sixteenth resistor is connected between the sixth output terminal of the control module and the control terminal of the fifth transistor; the twelfth resistor is connected between the first terminal of the thirteenth resistor and the third DC power supply; the second terminal of the thirteenth resistor is connected to the first terminal of the fifth transistor, and the second terminal of the fifth transistor is connected to the ground terminal. The control terminal of the sixth transistor is connected to the first terminal of the thirteenth resistor, the first terminal of the sixth transistor is connected to the third DC power supply, and the second terminal of the sixth transistor is connected to the first terminal of the fourteenth resistor; the fifteenth resistor is connected between the second terminal of the fourteenth resistor and the ground terminal. The control terminal of the seventh transistor is connected to the second terminal of the fourteenth resistor, the first terminal of the seventh transistor is connected to the third DC power supply, and the second terminal of the seventh transistor is connected to the first terminal of the eighth transistor; the control terminal of the eighth transistor is connected to the second terminal of the fourteenth resistor, and the second terminal of the eighth transistor is connected to the ground terminal. The control terminal of the sixth switch is connected to the second terminal of the seventh transistor, the first terminal of the sixth switch is connected to the fourth DC power supply, and the second terminal of the sixth switch is connected to the control terminal of the second drive module; the sixth resistor is connected between the ground terminal and the second terminal of the sixth switch.

6. The motor speed control circuit according to claim 1, characterized in that, The first Hall effect acquisition module includes: a first Hall element, a second Hall element, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, and a second diode; The input terminal of the first Hall element is connected to the first output terminal of the first motor, and the output terminal of the first Hall element is connected to the cathode terminal of the first diode. The seventeenth resistor is connected between the anode of the first diode and the first input terminal of the control module; the eighteenth resistor is connected between the anode of the first diode and the fifth DC power supply; the first capacitor is connected between the cathode of the first diode and the ground terminal; the second capacitor is connected between the first input terminal of the control module and the ground terminal. The input terminal of the second Hall element is connected to the second output terminal of the first motor, and the output terminal of the second Hall element is connected to the cathode of the second diode; the nineteenth resistor is connected between the anode of the second diode and the second input terminal of the control module; the twentieth resistor is connected between the anode of the second diode and the fifth DC power supply; the third capacitor is connected between the cathode of the second diode and the ground terminal; and the fourth capacitor is connected between the second input terminal of the control module and the ground terminal.

7. The motor speed control circuit according to claim 1, characterized in that, The second Hall acquisition module includes: a third Hall element, a fourth Hall element, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a third diode, and a fourth diode; The input terminal of the third Hall element is connected to the first output terminal of the second motor, and the output terminal of the third Hall element is connected to the cathode of the third diode; the twenty-first resistor is connected between the anode of the third diode and the third input terminal of the control module; the twenty-second resistor is connected between the anode of the third diode and the fifth DC power supply; the fifth capacitor is connected between the cathode of the third diode and the ground terminal; and the sixth capacitor is connected between the third input terminal of the control module and the ground terminal. The input terminal of the fourth Hall element is connected to the second output terminal of the second motor, and the output terminal of the fourth Hall element is connected to the cathode of the fourth diode; the twenty-third resistor is connected between the anode of the fourth diode and the fourth input terminal of the control module; the twenty-fourth resistor is connected between the anode of the fourth diode and the fifth DC power supply; the seventh capacitor is connected between the cathode of the fourth diode and the ground terminal; and the eighth capacitor is connected between the fourth input terminal of the control module and the ground terminal.

8. The motor speed control circuit according to claim 5, characterized in that, The motor speed control circuit further includes: a first protection module and a second protection module. The first protection module is connected to the first speed regulation module and is used to send a first protection signal to the control module based on a first voltage sampling signal collected by the first speed regulation module. The second protection module is connected to the second speed regulation module and is used to send a second protection signal to the control module based on a second voltage sampling signal collected by the second speed regulation module.

9. The motor speed control circuit according to claim 8, characterized in that, The first protection module includes: a 25th resistor, a 26th resistor, a 27th resistor, a 28th resistor, a 5th diode, a 9th capacitor, a 10th capacitor, and an 11th capacitor; The 25th resistor is connected between the first end of the 5th resistor and the first end of the 27th resistor; the 26th resistor is connected between the second end of the 5th resistor and the first end of the 28th resistor; the 28th resistor is connected between the first end of the 27th resistor and the ground terminal; the second end of the 27th resistor is connected to the fifth input terminal of the control module; the 9th capacitor is connected between the fifth input terminal of the control module and the ground terminal; the first end of the 5th diode is connected to the first end of the 5th resistor, and the second end of the 5th diode is connected to the second end of the 5th resistor; the 10th capacitor is connected between the first end of the 5th diode and the ground terminal; the 11th capacitor is connected between the second end of the 5th diode and the ground terminal. The second protection module includes: a 29th resistor, a 30th resistor, a 31st resistor, a 32nd resistor, a 6th diode, a 12th capacitor, a 13th capacitor, and a 14th capacitor; The twenty-ninth resistor is connected between the first end of the sixth resistor and the first end of the thirty-first resistor; the thirtieth resistor is connected between the second end of the sixth resistor and the first end of the thirty-second resistor; the thirty-second resistor is connected between the first end of the thirty-first resistor and the ground terminal; the second end of the thirty-first resistor is connected to the sixth input terminal of the control module; the twelfth capacitor is connected between the sixth input terminal of the control module and the ground terminal; the first end of the sixth diode is connected to the first end of the sixth resistor, and the second end of the sixth diode is connected to the second end of the sixth resistor; the thirteenth capacitor is connected between the first end of the sixth diode and the ground terminal; and the fourteenth capacitor is connected between the second end of the sixth diode and the ground terminal.

10. A sunshade curtain, characterized in that, Includes the motor speed control circuit according to any one of claims 1-9.

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