CN219659605U - Motor control circuit and motor control system - Google Patents
Motor control circuit and motor control system Download PDFInfo
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- CN219659605U CN219659605U CN202320873255.3U CN202320873255U CN219659605U CN 219659605 U CN219659605 U CN 219659605U CN 202320873255 U CN202320873255 U CN 202320873255U CN 219659605 U CN219659605 U CN 219659605U
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Abstract
The utility model relates to the field of electric control devices, in particular to a motor control circuit and a motor control system. The utility model provides a motor control circuit, which comprises an embedded processor sub-circuit, a motor driving sub-circuit and an angle sampling sub-circuit which are connected in sequence by signals; the embedded processor sub-circuit sends out motor control signals to the motor driving circuit, the motor driving circuit is used for driving the motor to change phases, three groups of sensors which are arranged at equal angles are arranged in the angle sampling sub-circuit, the sensors are used for detecting pulse signals, and the angle sampling sub-circuit transmits the pulse signals to the embedded processor sub-circuit. The method for controlling the angle by calculating the starting position of the motor based on the pulse signal returned by the sensor of the motor has the advantages of high control precision, flexible structural design, strong anti-interference capability, cost reduction and the like.
Description
Technical Field
The utility model relates to the field of electric control devices, in particular to a motor control circuit and a motor control system.
Background
The current electric control speed reducer adopts a main control board to drive a motor to drive an actuator speed reducing mechanism to rotate so as to control the angle of an electric actuator. The central shaft of the actuator is sleeved with an angle potentiometer, and the angle potentiometer can be directly driven or rotated in a structural gear transmission mode. The main control board collects the resistance value of the point marker in real time through the collecting circuit, and when the transmission mechanism rotates, the angle potentiometer is driven, and the resistance value change of the angle potentiometer and the physical angle change of the actuator are in a linear relation to obtain the actual physical relative angle.
The method has the advantages of simplicity and easy understanding and low cost. However, due to the influence of factors such as poor linearity of the angle potentiometer, structural gear clearances and the like, errors and return differences exist between the actual angle and the theoretical angle. These errors and rollbacks can further lead to a decrease in control accuracy, making it difficult to meet the requirements of high-accuracy control applications. In addition, the current actuator structure design has high tight combination degree requirement, which makes the product process complex and the manufacturing cost high.
Disclosure of Invention
In order to solve the problems, the utility model provides a motor control circuit and a motor control system.
The motor control circuit includes:
an embedded processor sub-circuit, a motor driving sub-circuit and an angle sampling sub-circuit which are connected in sequence in a signal manner;
the embedded processor sub-circuit sends out motor control signals to the motor driving circuit, the motor driving circuit is used for driving the motor to change phases, three groups of sensors which are arranged at equal angles are arranged in the angle sampling sub-circuit, the sensors are used for detecting pulse signals, and the angle sampling sub-circuit transmits the pulse signals to the embedded processor sub-circuit.
Further, the embedded processor sub-circuit comprises a first capacitor C1 and an embedded processor, wherein the negative electrode of the first capacitor C1 is grounded, and the positive end of the first capacitor C1 is connected with one end of the embedded processor and the positive end of a direct current power supply.
Further, the motor driving sub-circuit comprises a motor driver, a second capacitor C2 and a third capacitor C3;
the positive electrode end of the second capacitor C2 is connected with the CPB end of the motor driver, and the negative electrode end of the second capacitor C2 is connected with the CPA end of the motor driver; the positive electrode end of the third capacitor C3 is connected with the VREG end of the motor driver, and the negative electrode end of the third capacitor C3 is grounded;
the input end of the motor driver is connected with the output end of the embedded processor, the first output end out1 of the motor driver is connected with the U-phase line of the motor, the second output end out2 of the motor driver is connected with the W-phase line of the motor, and the third output end out3 of the motor driver is connected with the V-phase line of the motor.
Further, the angle sampling sub-circuit comprises a first pull-up resistor R1, a second pull-up resistor R2 and a third pull-up resistor R3, wherein the first ends of the first pull-up resistor R1, the second pull-up resistor R2 and the third pull-up resistor R3 are connected with the positive end of the direct current power supply, the second end of the first pull-up resistor R1 is connected with the IN1 end of the embedded processor and the sensor phase line, the second end of the second pull-up resistor R2 is connected with the IN2 end of the embedded processor and the sensor phase line, and the second end of the third pull-up resistor R3 is connected with the IN3 end of the embedded processor and the sensor phase line.
The motor control system includes:
the motor control circuit and the motor provided by the utility model are characterized in that the motor is in transmission connection with an execution control.
Further, the sensor is a hall sensor.
Further, the motor is a brushless motor.
Preferably, the execution control is a speed reducer.
Preferably, the execution control is a stirrer.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
the method for controlling the angle by calculating the starting position of the motor based on the pulse signal returned by the sensor of the motor has the advantages of high control precision, flexible structural design, strong anti-interference capability, cost reduction and the like.
Drawings
Fig. 1 is a schematic diagram of a motor control circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a motor-driven reducer apparatus according to an embodiment of the present utility model;
Detailed Description
The present utility model will be described in detail below with reference to the drawings and detailed embodiments, and before the technical solutions of the embodiments of the present utility model are described in detail, the terms and terms involved will be explained, and in the present specification, the components with the same names or the same reference numerals represent similar or identical structures, and are only limited for illustrative purposes.
The motor control circuit consists of an embedded processor sub-circuit, a motor driving sub-circuit and an angle sampling sub-circuit, and the three sub-circuits are sequentially connected through signals. The embedded processor sub-circuit sends motor control signals to the motor driving circuit, such as controlling the motor to rotate forward, rotate backward, stop, change speed, etc., the motor driving circuit is used for driving the motor to change phase, and the sensor arranged in the angle sampling sub-circuit is used for detecting pulse signals and transmitting the pulse signals to the embedded processor sub-circuit for processing.
An embedded processor sub-circuit includes an embedded processor and a first capacitor. The negative electrode of the first capacitor is grounded, and the positive electrode of the first capacitor is connected with one end of the embedded processor and the positive end of the direct current power supply. Therefore, the embedded processor can acquire a stable working voltage through the capacitor charging and discharging modes, so that the normal working of the embedded processor is ensured.
The motor driving sub-circuit is composed of a motor driver, a second capacitor and a third capacitor. Wherein, the positive pole end of the third capacitor is connected with VREG end of the motor driver, and the negative pole end is grounded; the positive terminal of the second capacitor is connected with the CPB terminal of the motor driver, and the negative terminal of the second capacitor is connected with the CPA terminal of the motor driver. The input end of the motor driver is connected with the output end of the embedded processor, and the three output ends of the motor driver are respectively connected with three phase lines of the motor, so that the motor is driven.
The angle sampling sub-circuit includes three pull-up resistors (R1, R2, R3). The first ends of the resistors are connected with the positive end of the direct current power supply, and the second ends of the resistors are respectively connected with the IN1, IN2 and IN3 ends of the embedded processor and the phase lines of the three sensors. When the sensor detects the rotor poles, pulse signals are generated, and the signals pass through an angle sampling sub-circuit and are transmitted to an embedded processor for processing. By sampling these pulse signals, the embedded processor can derive the position of the motor rotor and achieve accurate control of the motor by controlling the motor driver.
The utility model also provides a motor control system which adopts the motor control circuit and is in transmission connection with the execution control on the motor.
The motor is preferably a brushless motor with a sensor, preferably a hall position sensor, and the execution control can be any control which needs to be controlled to perform rotational speed control, such as a speed reducer.
When the speed reducer works, the embedded processor calculates the rotation position and the rotation speed of the motor by detecting the pulse number through the sensor, so that the fine control of the motor is realized. If the reduction ratio of the reducer is 3600:1, and the output angle precision is required to be 1 degree, the output precision of 1 degree can be realized only by rotating the motor for 10 circles.
Specifically, when the motor starts to rotate, the sensor detects the movement of the rotor, and a pulse signal is generated. The embedded processor calculates the rotation position and the rotation speed of the motor according to the pulse signals, and then sends corresponding control signals to the motor through the motor driving sub-circuit to realize the phase-change control of the motor. Meanwhile, three groups of sensors which are arranged at equal angles are arranged in the angle sampling sub-circuit and are used for detecting pulse signals. These sensors transmit pulse signals to an embedded processor sub-circuit, which in turn transmits control signals to a motor drive sub-circuit.
The ratio of the speed reducing mechanism of the speed reducer is 3600:1, the motor needs to rotate 3600 times to enable the output shaft to rotate one circle. Therefore, if the precision of the output angle is required to be 1 degree, the output with the precision of 1 degree can be realized only by rotating the motor for 10 circles. This is because 3600/360=10, i.e., the motor can rotate the output shaft 1 turn only by 10 turns, thereby realizing an output with an accuracy of 1 °.
The novel scope is defined, and various modifications and improvements made by those skilled in the art to the technical scheme of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (9)
1. A motor control circuit, comprising:
an embedded processor sub-circuit, a motor driving sub-circuit and an angle sampling sub-circuit which are connected in sequence in a signal manner;
the embedded processor sub-circuit sends out motor control signals to the motor driving circuit, the motor driving circuit is used for driving the motor to change phases, three groups of sensors which are arranged at equal angles are arranged in the angle sampling sub-circuit, the sensors are used for detecting pulse signals, and the angle sampling sub-circuit transmits the pulse signals to the embedded processor sub-circuit.
2. The motor control circuit of claim 1 wherein the embedded processor sub-circuit comprises a first capacitor C1 and an embedded processor, the negative terminal of the first capacitor C1 is grounded, and the positive terminal of the first capacitor C1 is connected to one terminal of the embedded processor and the positive terminal of the dc power supply.
3. The motor control circuit of claim 1 wherein the motor drive subcircuit includes a motor driver, a second capacitor C2, and a third capacitor C3;
the positive electrode end of the second capacitor C2 is connected with the CPB end of the motor driver, and the negative electrode end of the second capacitor C2 is connected with the CPA end of the motor driver; the positive electrode end of the third capacitor C3 is connected with the VREG end of the motor driver, and the negative electrode end of the third capacitor C3 is grounded;
the input end of the motor driver is connected with the output end of the embedded processor, the first output end out1 of the motor driver is connected with the U-phase line of the motor, the second output end out2 of the motor driver is connected with the W-phase line of the motor, and the third output end out3 of the motor driver is connected with the V-phase line of the motor.
4. The motor control circuit of claim 1 wherein the angle sampling sub-circuit comprises a first pull-up resistor R1, a second pull-up resistor R2, and a third pull-up resistor R3, wherein first ends of the first pull-up resistor R1, the second pull-up resistor R2, and the third pull-up resistor R3 are connected to a positive terminal of a dc power supply, a second end of the first pull-up resistor R1 is connected to an IN1 terminal of an embedded processor and a sensor phase line, a second end of the second pull-up resistor R2 is connected to an IN2 terminal of the embedded processor and the sensor phase line, and a second end of the third pull-up resistor R3 is connected to an IN3 terminal of the embedded processor and the sensor phase line.
5. A motor control system comprising the motor control circuit of any one of claims 1-4 and a motor, wherein the motor is drivingly coupled to an execution control.
6. The motor control system of claim 5 wherein the sensor is a hall sensor.
7. The motor control system of claim 5 wherein the motor is a brushless motor.
8. The motor control system of claim 5 wherein the execution control is a decelerator.
9. The motor control system of claim 5 wherein the implement control is a stirrer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320873255.3U CN219659605U (en) | 2023-04-13 | 2023-04-13 | Motor control circuit and motor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320873255.3U CN219659605U (en) | 2023-04-13 | 2023-04-13 | Motor control circuit and motor control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659605U true CN219659605U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320873255.3U Active CN219659605U (en) | 2023-04-13 | 2023-04-13 | Motor control circuit and motor control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659605U (en) |
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2023
- 2023-04-13 CN CN202320873255.3U patent/CN219659605U/en active Active
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