A drive control circuit for a small stepping motor

Abstract

The utility model provides a kind of driving control circuit of small stepping motor, including power supply, power voltage adjusting circuit, stepping motor main control circuit and stepping motor drive circuit, the output end of power supply is connected with the input end of power voltage adjusting circuit, power supply is also connected with stepping motor drive circuit power supply, the output end of power voltage adjusting circuit is connected with the input end power supply of stepping motor main control circuit, the input end of stepping motor main control circuit is also connected with control button, the output end of stepping motor main control circuit is connected with the input end control connection of stepping motor drive circuit, the output end of stepping motor drive circuit is connected with stepping motor power supply drive.The utility model has the beneficial effect that: it can be realized under the premise of guaranteeing the circuit stability and heat dissipation performance of stepping motor, substantially reduce the overall volume of stepping motor.

Description

Technical Field

[0001] This utility model relates to the field of control circuit technology, specifically to a drive control circuit for a small stepper motor. Background Technology

[0002] A stepper motor is an electromagnetic drive device that converts electrical pulses into angular or linear displacement of a mechanical axis. Stepper motors are simple to control, offer precise positioning, and have a fast response time. They are widely used in automation equipment, 3D printers, CNC machine tools, and other fields, with various types of stepper motors employed to achieve desired motion postures.

[0003] However, the existing traditional stepper motor drive mode has some obvious limitations in controlling the motor operation, such as thermal effect and size issues. The main reason is that the drive circuit is relatively complex, resulting in a large overall area of ​​the drive control circuit. Consequently, it is difficult to balance the overall size of the stepper motor and heat dissipation, resulting in a poor user experience. Utility Model Content

[0004] To address the problems in the prior art, this utility model provides a drive control circuit for a small stepper motor. By incorporating a power supply, a power voltage adjustment circuit, a main control circuit for the stepper motor, and a drive circuit for the stepper motor in a coordinated manner, the main control circuit can control the output power and output signal of the drive circuit based on the instructions from the control buttons, thereby adjusting the working state of the stepper motor. This significantly reduces the overall size of the stepper motor while ensuring its circuit stability and heat dissipation performance, greatly improving the user experience and solving the problem of balancing the overall size and heat dissipation of stepper motors in the prior art.

[0005] This utility model provides a drive control circuit for a small stepper motor, including a power supply, a power supply voltage adjustment circuit, a stepper motor main control circuit, and a stepper motor drive circuit. The output terminal of the power supply is connected to the input terminal of the power supply voltage adjustment circuit, and the power supply is also connected to the stepper motor drive circuit. The output terminal of the power supply voltage adjustment circuit is connected to the input terminal of the stepper motor main control circuit. The input terminal of the stepper motor main control circuit is also connected to a control button. The output terminal of the stepper motor main control circuit is connected to the input terminal of the stepper motor drive circuit, and the output terminal of the stepper motor drive circuit is connected to the power supply and drive of the stepper motor. The stepper motor main control circuit can control the output power and output signal of the stepper motor drive circuit according to the instruction information of the control button, thereby adjusting the working state of the stepper motor.

[0006] This utility model is further improved in that the main control circuit of the stepper motor includes a main control chip U3, a resistor R11, a capacitor C17, a capacitor C18, and a capacitor C19. The main control chip U3 has 48 pins. The first pin of the main control chip U3 is connected to one end of the capacitor C17, one end of the capacitor C18, and the output terminal of the power supply voltage adjustment circuit. The 48th pin of the main control chip U3 is connected to one end of the capacitor C19 and the output terminal of the power supply voltage adjustment circuit. The 11th pin of the main control chip U3 is connected to one end of the resistor R11, and the other end of the resistor R11 is connected to the stepper motor drive circuit for control.

[0007] This utility model is further improved. The stepper motor drive circuit includes a drive chip U4, a resistor R12, a capacitor C21, and a capacitor C22. The drive chip U4 has 48 pins. The third pin of the drive chip U4 is connected to one end of the capacitor C21, one end of the capacitor C22, and the output terminal of the power supply. The 20th pin of the drive chip U4 is connected to one end of the resistor R12. The other end of the resistor R12 is connected to the other end of the resistor R11. The fourth, sixth, seventh, and ninth pins of the drive chip U4 are connected to the power supply and drive of the stepper motor. The 14th, 16th, 42nd, and 43rd pins of the main control chip U3 are connected to the control of the stepper motor drive circuit.

[0008] This utility model is further improved by including a step-down chip U1, a voltage regulator chip U2, a resistor R2, and an inductor L1 in the power supply voltage adjustment circuit. The step-down chip U1 has 8 pins, and the voltage regulator chip U2 has 4 pins. The first pin of the step-down chip U1 is connected to the output terminal of the power supply. The eighth pin of the step-down chip U1 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the seventh pin of the step-down chip U1 and one end of the inductor L1. The other end of the inductor L1 is connected to the first pin of the voltage regulator chip U2. The second and fourth pins of the voltage regulator chip U2 are connected to the first and 48 pins of the main control chip U3 for power supply. The 40, 39, 36, and 37 pins of the driver chip U4 are connected to the 14, 16, 42, and 43 pins of the main control chip U3, respectively.

[0009] This utility model is further improved, and the main control chip U3 is model N32G430C8L7.

[0010] This utility model is further improved, and the driving chip U4 is model number TB67S579FTG.

[0011] This utility model is further improved in that the step-down chip U1 is model EG1192L and the voltage regulator chip U2 is model AMS1117-3.3V.

[0012] In a further improvement to this invention, the power supply voltage is 24V.

[0013] Compared with the prior art, the beneficial effects of this utility model are: it provides a drive control circuit for a small stepper motor. By setting up a power supply, a power voltage adjustment circuit, a main control circuit for the stepper motor, and a stepper motor drive circuit that cooperate with each other in the drive control circuit, the main control circuit can control the output power and output signal of the stepper motor drive circuit according to the command information of the control button, thereby adjusting the working state of the stepper motor. This can significantly reduce the overall size of the stepper motor while ensuring the circuit stability and heat dissipation performance of the stepper motor. The circuit is integrated onto a PCB that is as small as possible. Physical buttons are used to control the pulse frequency, start / stop, and forward / reverse rotation, making motor speed adjustment as simple and efficient as possible. Multiple microstepping control signals can be output through DIP switches, making the control of the stepper motor drive circuit more precise, thereby reducing motor noise and jitter. Thanks to the automatic sine wave generation function of the driver chip, the noise is lower in the new AWGS mode than in the 1 / 32 microstepping mode, and the motor rotation is smoother and more stable, which greatly improves the user experience and solves the problem of balancing the overall size and heat dissipation of stepper motors in existing technologies. Attached Figure Description

[0014] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic block diagram of the drive control circuit for a small stepper motor according to the present invention.

[0016] Figure 2 This is a circuit diagram of the main control circuit for the stepper motor of this utility model.

[0017] Figure 3 This is a circuit diagram of the stepper motor drive circuit of this utility model;

[0018] Figure 4 This is a circuit diagram of the power supply voltage adjustment circuit of this utility model. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] like Figures 1-4As shown, this utility model provides a drive control circuit for a small stepper motor, including a power supply, a power supply voltage adjustment circuit, a stepper motor main control circuit, and a stepper motor drive circuit. The output terminal of the power supply is connected to the input terminal of the power supply voltage adjustment circuit, and the power supply is also connected to the stepper motor drive circuit. The output terminal of the power supply voltage adjustment circuit is connected to the input terminal of the stepper motor main control circuit. The input terminal of the stepper motor main control circuit is also connected to a control button. The output terminal of the stepper motor main control circuit is connected to the input terminal of the stepper motor drive circuit, and the output terminal of the stepper motor drive circuit is connected to the power supply and drive of the stepper motor. The power supply voltage is 24V. The stepper motor main control circuit can control the output power and output signal of the stepper motor drive circuit according to the command information of the control button, thereby adjusting the working state of the stepper motor. In this embodiment, the main control circuit and the stepper motor drive circuit are integrated onto a PCB that is as small as possible. Physical buttons are used to control the pulse frequency, start / stop, and forward / reverse rotation, making motor speed adjustment as simple and efficient as possible. Multiple microstepping control signals can be output through DIP switches, making the control of the stepper motor drive circuit more precise, thereby reducing motor noise and jitter. Thanks to the automatic sine wave generation function of the drive chip, the noise is lower in the new AWGS mode than in the 1 / 32 microstepping mode, and the motor rotation is smoother and more stable, greatly improving the user experience.

[0023] like Figure 2 As shown, the stepper motor main control circuit includes a main control chip U3, resistor R11, capacitors C17, C18, and C19. The main control chip U3 is model N32G430C8L7 and has 48 pins. Pin 1 of U3 is connected to one end of capacitor C17, one end of capacitor C18, and the output of the power supply voltage adjustment circuit. Pin 48 is connected to one end of capacitor C19 and the output of the power supply voltage adjustment circuit. Pin 11 is connected to one end of resistor R11, and the other end of resistor R11 is connected to the stepper motor drive circuit. Pins 14, 16, 42, and 43 of U3 are also connected to the stepper motor drive circuit. In this embodiment, the stepper motor main control circuit controls the output power and output signal of the stepper motor drive circuit according to the instructions from the control buttons, thereby adjusting the working state of the stepper motor. The main control chip U3 is connected to the driver chip U4 to control the various operating states of the stepper motor. The accelerate and decelerate buttons can adjust the motor speed by changing the pulse frequency output from the main control chip U3 to the CLK pin. Other signals can be dynamically adjusted according to the needs of the scenario, such as controlling precision and forward / reverse rotation.

[0024] like Figure 3 As shown, the stepper motor drive circuit includes a driver chip U4, resistor R12, capacitor C21, and capacitor C22. Driver chip U4 is a TB67S579FTG with 48 pins. Pin 3 of driver chip U4 is connected to one end of capacitor C21, one end of capacitor C22, and the output terminal of the power supply. Pin 20 of driver chip U4 is connected to one end of resistor R12, and the other end of resistor R12 is connected to the other end of resistor R11. Pins 4, 6, 7, and 9 of driver chip U4 are connected to the stepper motor power supply. Pins 40, 39, 36, and 37 of driver chip U4 are connected to pins 14, 16, 42, and 43 of the main control chip U3, respectively. In this embodiment, the stepper motor drive circuit is used to control the operating state of the stepper motor according to the command information from the main control circuit of the stepper motor. The driver chip U4 has three input signals: 1. Step pulse signal CLK; 2. Sleep signal SLEEP_X; 3. Reset signal RESET_X; 4. Enable signal ENABLE. These signals are input through the main control chip U3, and the appropriate signal level for normal motor operation is 3.3V.

[0025] like Figure 4 As shown, the power supply voltage adjustment circuit includes a step-down chip U1, a voltage regulator chip U2, a resistor R2, and an inductor L1. The step-down chip U1 is an EG1192L, and the voltage regulator chip U2 is an AMS1117-3.3V. The step-down chip U1 has 8 pins, and the voltage regulator chip U2 has 4 pins. Pin 1 of the step-down chip U1 is connected to the output of the power supply. Pin 8 of the step-down chip U1 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to pin 7 of the step-down chip U1 and one end of the inductor L1. The other end of the inductor L1 is connected to pin 1 of the voltage regulator chip U2. Pins 2 and 4 of the voltage regulator chip U2 are connected to pins 1 and 48 of the main control chip U3 for power supply. In this embodiment, the power supply voltage adjustment circuit is used to power the stepper motor's main control circuit.

[0026] As can be seen from the above, this utility model provides a drive control circuit for a small stepper motor. By setting up a power supply, a power voltage adjustment circuit, a main control circuit for the stepper motor, and a stepper motor drive circuit that cooperate with each other in the drive control circuit, the main control circuit can control the output power and output signal of the stepper motor drive circuit according to the command information of the control button, thereby adjusting the working state of the stepper motor. This can significantly reduce the overall size of the stepper motor while ensuring the circuit stability and heat dissipation performance of the stepper motor, by integrating the main control circuit and the stepper motor drive circuit into a single circuit. On a PCB that is as small as possible, physical buttons are used to control the pulse frequency, start / stop, and forward / reverse rotation, making the adjustment of motor speed as simple and efficient as possible. Multiple microstepping control signals can be output through DIP switches, making the control of the stepper motor drive circuit more precise, thereby reducing motor noise and jitter. Thanks to the automatic sine wave generation function of the driver chip, the noise in the new AWGS mode is lower than that in the 1 / 32 microstepping mode, and the motor rotation is smoother and more stable, which greatly improves the user experience and solves the problem of balancing the overall size and heat dissipation of stepper motors in existing technologies.

[0027] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A drive control circuit for a small stepper motor, characterized in that: The system includes a power supply, a power voltage adjustment circuit, a stepper motor main control circuit, and a stepper motor drive circuit. The output terminal of the power supply is connected to the input terminal of the power voltage adjustment circuit, and the power supply is also connected to the stepper motor drive circuit. The output terminal of the power voltage adjustment circuit is connected to the input terminal of the stepper motor main control circuit, and the input terminal of the stepper motor main control circuit is also connected to a control button. The output terminal of the stepper motor main control circuit is connected to the input terminal of the stepper motor drive circuit, and the output terminal of the stepper motor drive circuit is connected to the power supply and drive of the stepper motor. The stepper motor main control circuit can control the output power and output signal of the stepper motor drive circuit according to the command information of the control button, thereby adjusting the working state of the stepper motor.

2. The drive control circuit for the small stepper motor according to claim 1, characterized in that: The main control circuit of the stepper motor includes a main control chip U3, a resistor R11, a capacitor C17, a capacitor C18, and a capacitor C19. The main control chip U3 has 48 pins. Pin 1 of the main control chip U3 is connected to one end of capacitor C17, one end of capacitor C18, and the output terminal of the power supply voltage adjustment circuit. Pin 48 of the main control chip U3 is connected to one end of capacitor C19 and the output terminal of the power supply voltage adjustment circuit. Pin 11 of the main control chip U3 is connected to one end of resistor R11, and the other end of resistor R11 is connected to the stepper motor drive circuit. Pins 14, 16, 42, and 43 of the main control chip U3 are also connected to the stepper motor drive circuit.

3. The drive control circuit for the small stepper motor according to claim 2, characterized in that: The stepper motor drive circuit includes a driver chip U4, a resistor R12, a capacitor C21, and a capacitor C22. The driver chip U4 has 48 pins. Pin 3 of the driver chip U4 is connected to one end of capacitor C21, one end of capacitor C22, and the output terminal of the power supply. Pin 20 of the driver chip U4 is connected to one end of resistor R12, and the other end of resistor R12 is connected to the other end of resistor R11. Pins 4, 6, 7, and 9 of the driver chip U4 are connected to the stepper motor power supply and drive. Pins 40, 39, 36, and 37 of the driver chip U4 are connected to pins 14, 16, 42, and 43 of the main control chip U3, respectively.

4. The drive control circuit for the small stepper motor according to claim 3, characterized in that: The power supply voltage adjustment circuit includes a step-down chip U1, a voltage regulator chip U2, a resistor R2, and an inductor L1. The step-down chip U1 has 8 pins, and the voltage regulator chip U2 has 4 pins. The first pin of the step-down chip U1 is connected to the output terminal of the power supply. The eighth pin of the step-down chip U1 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the seventh pin of the step-down chip U1 and one end of the inductor L1. The other end of the inductor L1 is connected to the first pin of the voltage regulator chip U2. The second and fourth pins of the voltage regulator chip U2 are connected to the first and fourth pins of the main control chip U3 for power supply.

5. The drive control circuit for the small stepper motor according to claim 4, characterized in that: The main control chip U3 is model N32G430C8L7.

6. The drive control circuit for the small stepper motor according to claim 5, characterized in that: The driver chip U4 is model TB67S579FTG.

7. The drive control circuit for the small stepper motor according to claim 6, characterized in that: The step-down chip U1 is model EG1192L and the voltage regulator chip U2 is model AMS1117-3.3V.

8. The drive control circuit for the small stepper motor according to claim 7, characterized in that: The power supply voltage is 24V.

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