Small motor driver control circuit with display

Abstract

The utility model discloses a small -size motor driver control circuit with display screen, including main control chip, motor driver, power supply and display screen, and main control chip is connected with motor driver and display screen, is connected outside motor through motor driver, and power supply supplies power for both. Motor driver contains motor drive chip U1, and it has drive output, communication bus, direction control, speed and feedback pin, and drive output is connected outside motor, and the remaining pin is all connected main control chip, realizes parameter configuration, direction speed control and feedback receiving. The utility model has the advantages of: integrated display screen directly looks state, and main control chip nimblely configures parameter, accurate speed control and control to real -time feedback, and power supply is stable, and compact structure is efficient, is applicable to small -size motor drive, and promotes control convenience and intelligent level.

Description

Technical Field

[0001] This utility model relates to the field of motor drive control technology, and more specifically to a small motor driver control circuit with a display screen. Background Technology

[0002] Existing three-phase motor drive control circuits typically use discrete power switching devices to construct the drive bridge, along with independent current sensing elements and external sensors to monitor and protect the operating status. This architecture not only requires additional external components for overcurrent and overload protection, but also results in complex wiring due to the large number of components, increasing the difficulty of R&D and debugging, as well as the complexity of material procurement and inventory management. Furthermore, the dispersed layout of discrete components occupies more circuit board space, hindering the miniaturization and integration of controllers and making it difficult to meet the compact installation space requirements of modern equipment. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a small motor driver control circuit with a display screen. The control circuit adopts an integrated motor driver chip, which reduces the number of discrete components, simplifies wiring, achieves miniaturization and integration, and displays the status intuitively through the display screen.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a small motor driver control circuit with a display screen, comprising a main control chip, a motor driver, a power supply, and a display screen. The main control chip is connected to the motor driver and the display screen, and is connected to an external motor through the motor driver. The power supply is connected to the main control chip and the motor driver. The motor driver includes: The motor drive chip U1 has a drive output pin, a communication bus pin, a direction control pin, a speed pin, and a feedback pin. The drive output pin is connected to an external motor, and the communication bus pin, the direction control pin, the speed pin, and the feedback pin are all connected to the main control chip, enabling the main control chip to configure operating parameters, control the motor direction and speed, and receive feedback status.

[0005] As a further improvement of this utility model, the motor drive chip U1 also has a first power supply pin and a second power supply pin. The first power supply pin is connected to the power supply and is connected in parallel with capacitors C3 and C4. The first power supply pin is also connected to capacitor C2 and then connected to the second power supply pin.

[0006] As a further improvement of this utility model, the motor drive chip U1 also has a switch pin and a secondary power supply pin. The switch pin is connected to an inductor L1 and then to the secondary power supply pin. The secondary power supply pin is connected to a capacitor C1 and then grounded.

[0007] As a further improvement of this utility model, the drive output pin includes a first output pin, a second output pin, and a third output pin. The first output pin, the second output pin, and the third output pin are all connected in parallel with a Zener diode and then connected to the three terminals of an external three-phase motor.

[0008] As a further improvement of this utility model, the communication bus pin, direction control pin, speed pin and feedback pin are all connected in parallel with Zener diodes and then connected to the pins of the main control chip.

[0009] As a further improvement of this utility model, a display interface circuit is also connected between the main control chip and the display screen, and the display interface circuit includes: The display interface chip J2 has several data transmission pins, each connected to a pull-up resistor and then connected to the main control chip.

[0010] The advantages of this invention are: the use of a highly integrated motor driver chip reduces the number of external components and the circuit board area; the built-in voltage and current detection functions eliminate the need for external sensors, simplifying the circuit structure; the integrated display interface allows for real-time display of the motor's operating status; and the modular design facilitates installation and maintenance, contributing to product miniaturization. Attached Figure Description

[0011] Figure 1 This is a block diagram of the control circuit for a small motor driver with a display screen according to the present invention. Figure 2 for Figure 1 Circuit diagram of a medium-sized motor driver; Figure 3 for Figure 1 Circuit diagram of the connection between the motor driver and the motor; Figure 4 for Figure 1 Circuit diagram of the connection socket between the motor driver and the main control chip; Figure 5 for Figure 1 The circuit diagram of the display interface circuit connected to the central display screen. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0013] Reference Figure 1As shown in the figure, a small motor driver control circuit with a display screen in this embodiment includes a main control chip 1, a motor driver 2, a power supply 4, and a display screen 3. The main control chip 1 is connected to the motor driver 2 and the display screen 3, and is connected to an external motor 5 through the motor driver 2. The power supply 4 is connected to the main control chip 1 and the motor driver 2. The motor driver 2 includes a motor driver chip U1, which has a drive output pin, a communication bus pin, a direction control pin, a speed pin, and a feedback pin. The drive output pin is connected to the external motor 5, and the communication bus pin, direction control pin, speed pin, and feedback pin are all connected to the main control chip 1, enabling the main control chip 1 to configure operating parameters, control the motor direction and speed, and receive feedback status. The main control chip 1 configures operating parameters to the motor driver chip U1 through the communication bus pin, sends control signals through the direction control pin and speed pin, outputs power signals through the drive output pin to drive the external motor, and the feedback pin feeds back the motor operating status to the main control chip 1. The main control chip 1 then transmits the status information to the display screen 3 for display. This solution uses an integrated motor drive chip U1 to replace discrete power switching devices, reducing the number of devices, simplifying wiring, lowering the difficulty of R&D and debugging and the complexity of material management, while saving circuit board space and facilitating the miniaturization and integration of the controller, thus solving the shortcomings of the discrete architecture in the existing technology.

[0014] Furthermore, refer to Figure 2 As shown, the motor drive chip U1 also has a first power supply pin and a second power supply pin. The first power supply pin is connected to the power supply 4 and is connected in parallel with capacitors C3 and C4. The first power supply pin is also connected to capacitor C2, which in turn connects to the second power supply pin. Capacitors C2, C3, and C4 form a multi-stage filter circuit to filter the voltage input from the power supply 4, reducing power supply noise interference, ensuring a stable operating voltage for the motor drive chip U1, and improving the reliability of the circuit operation. This design, through integrated filter capacitor configuration, replaces external independent filter components, further simplifying the circuit structure and demonstrating the advanced nature of integrated design.

[0015] Furthermore, refer to Figure 2 As shown, the motor drive chip U1 also has a switch pin and a secondary power supply pin. The switch pin is connected to an inductor L1 and then to the secondary power supply pin. The secondary power supply pin is connected to a capacitor C1 and then grounded. Through the secondary power supply pin, the square wave signal output by the switch pin of the motor drive chip U1 can be effectively output as a regulated secondary power supply under the action of inductor L1 and capacitor C1. Thus, there is no need to set up an additional secondary power supply circuit, which further realizes miniaturization.

[0016] Furthermore, refer to Figure 3As shown, the drive output pins include a first output pin, a second output pin, and a third output pin. The first output pin, the second output pin, and the third output pin are all connected in parallel with Zener diodes and then connected to the three terminals of the external three-phase motor, realizing the direct connection of the windings of the three-phase motor. The current distribution is completed inside the motor drive chip U1, which further realizes miniaturization. At the same time, the parallel connection of Zener diodes can ensure that the voltage output to the motor is stable and reliable.

[0017] Furthermore, refer to Figure 4 As shown, the communication bus pin, direction control pin, speed pin, and feedback pin are all connected to the main control chip pins with Zener diodes in parallel. Similarly, the use of parallel Zener diodes can be used to stabilize signal transmission.

[0018] Furthermore, refer to Figure 5 As shown, a display interface circuit is also connected between the main control chip 1 and the display screen 3. This display interface circuit includes: The display interface chip J2 has several data transmission pins, each connected to a pull-up resistor and then connected to the main control chip 1. The integrated display interface chip J2 is used to establish the connection between the main control chip 1 and the display screen 3, further realizing the effect of miniaturization and integration.

[0019] This embodiment provides the following specific examples: the main control chip U1 adopts an STM32L series microcontroller, the motor drive chip U1 can adopt a DRV10987S, and the display interface chip J2 can adopt a 20-pin socket chip.

[0020] In summary, this utility model reduces the number of discrete components and simplifies wiring by using a control circuit with an integrated motor drive chip, achieving miniaturization and integration of the controller. At the same time, it intuitively displays the motor status on a display screen, overcoming the shortcomings of the discrete architecture in the prior art and improving the convenience and reliability of motor drive control.

[0021] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A small motor driver control circuit with a display screen, comprising a main control chip (1), a motor driver (2), a power supply (4), and a display screen (3), wherein the main control chip (1) is connected to the motor driver (2) and the display screen (3), and is connected to an external motor (5) through the motor driver (2), and the power supply (4) is connected to the main control chip (1) and the motor driver (2), characterized in that: The motor driver (2) includes: The motor drive chip U1 has a drive output pin, a communication bus pin, a direction control pin, a speed pin, and a feedback pin. The drive output pin is connected to an external motor (5), and the communication bus pin, the direction control pin, the speed pin, and the feedback pin are all connected to the main control chip (1), so that the main control chip (1) can configure working parameters, control the direction and speed of the motor, and receive feedback status.

2. The small motor driver control circuit with a display screen according to claim 1, characterized in that: The motor drive chip U1 also has a first power supply pin and a second power supply pin. The first power supply pin is connected to the power supply (4) and is connected in parallel with capacitors C3 and C4. The first power supply pin is also connected to capacitor C2 and then connected to the second power supply pin.

3. The small motor driver control circuit with a display screen according to claim 2, characterized in that: The motor drive chip U1 also has a switch pin and a secondary power supply pin. The switch pin is connected to an inductor L1 and then to the secondary power supply pin. The secondary power supply pin is connected to a capacitor C1 and then grounded.

4. The small motor driver control circuit with a display screen according to any one of claims 1 to 3, characterized in that: The drive output pins include a first output pin, a second output pin, and a third output pin. Each of the first, second, and third output pins is connected in parallel with a Zener diode and then connected to three terminals of an external three-phase motor.

5. The small motor driver control circuit with a display screen according to any one of claims 1 to 3, characterized in that: The communication bus pin, direction control pin, speed pin, and feedback pin are all connected in parallel with Zener diodes and then connected to the pins of the main control chip.

6. The small motor driver control circuit with a display screen according to any one of claims 1 to 3, characterized in that: A display interface circuit is also connected between the main control chip (1) and the display screen (3), and the display interface circuit includes: The display interface chip J2 has several data transmission pins, and each of these pins is connected to a pull-up resistor and then connected to the main control chip (1).

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