Motor speed regulation device based on Hall knob

Abstract

The utility model discloses a motor speed regulation device based on a Hall knob, relates to the technical field of motor control, and solves the technical problems that a direct current motor speed regulation device is relatively inconvenient in speed regulation operation and relatively high in cost. The device comprises a voltage conversion module, a speed regulation controller, a Hall sensor, a knob and a magnet, the voltage conversion module is used for converting 220V voltage into working voltage of the motor and the speed regulation controller; the knob and the magnet are of an integrated structure, and the Hall sensor is adjacent to the knob; the knob rotates to drive the magnet to synchronously rotate to continuously change the magnetic field intensity of the Hall sensor; based on the continuous change of the magnetic field intensity, the Hall sensor continuously changes the signal intensity input into the speed regulation controller. The magnetic field intensity of the Hall sensor is continuously adjusted through the rotary knob and the magnet, the speed of the motor is continuously adjusted and controlled through the speed adjusting controller, and the speed adjusting device is simple in structure, convenient to operate, high in control precision, low in cost and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of motor control technology, and in particular to a motor speed control device based on a Hall effect knob. Background Technology

[0002] As the most important electromechanical energy conversion device, the electric motor is used in all sectors of the national economy and people's daily lives. A DC motor is a device that converts DC electrical energy into mechanical energy. Its principle is that the current supplied by a DC power source generates a magnetic field, thereby causing the motor to rotate. It features good starting performance, convenient speed adjustment, and flexible control, and is widely used in various industrial and civil applications.

[0003] A DC motor speed controller is a device used to control the speed of a DC motor. It adjusts the motor's speed by changing the input voltage or current, achieving precise control and high-efficiency output. Currently, DC motor speed controllers primarily use Hall effect sensors, but these methods are inconvenient to operate and costly, limiting their usability.

[0004] In the process of developing this utility model, the applicant discovered at least the following problems in the prior art:

[0005] The speed control operation of DC motor speed control devices based on Hall sensors is inconvenient and costly, which affects their usability. Utility Model Content

[0006] The purpose of this invention is to provide a motor speed control device based on a Hall effect knob, thereby solving the technical problems of inconvenient operation and high cost of existing DC motor speed control devices based on Hall effect sensors, which affect their usability. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] This utility model provides a motor speed control device based on a Hall effect knob, including a voltage conversion module, a speed controller, a Hall sensor, a knob, and a magnet. The voltage conversion module converts 220V voltage into the operating voltage of the motor and the speed controller. The knob and magnet are integrated, and the Hall sensor is arranged adjacent to the knob. Rotation of the knob drives the magnet to rotate synchronously, continuously changing the magnetic field strength of the Hall sensor. Based on the continuous change in magnetic field strength, the Hall sensor continuously changes the signal strength input to the speed controller to adjust the motor speed.

[0009] Preferably, the chip model of the speed controller is FT61EC21B.

[0010] Preferably, the Hall sensor includes Hall sensor H1 and Hall sensor H1B connected in parallel. The Hall sensor H1B is model CC6503RST3. The VOUT pins of both Hall sensor H1 and Hall sensor H1B are connected to the AD / ISPCLK pin of the speed controller.

[0011] Preferably, the motor speed control device further includes a first motor magnet drive circuit and a second motor magnet drive circuit. The first motor magnet drive circuit and the second motor magnet drive circuit are respectively connected to the MOTOR pin and MGT pin of the speed controller, and both drive the motor magnet through MOSFETs.

[0012] Preferably, the gate of the MOS transistor Q1 in the first motor magnet drive circuit is connected to the MOTOR pin of the speed controller, the source is grounded, and the drain is connected to a 24V voltage; the gate of the MOS transistor Q2 in the second motor magnet drive circuit is connected to the MGT pin of the speed controller, the source is grounded, and the drain is connected to a 24V voltage.

[0013] Preferably, the voltage conversion module includes a first voltage conversion circuit, a second voltage conversion circuit, and a third voltage conversion circuit connected in sequence. The first voltage conversion circuit converts 220V AC power to 300V DC power, the second voltage conversion circuit converts 300V DC power to 24V DC power, and the third voltage conversion circuit converts 24V DC power to 5V DC power.

[0014] Preferably, the first voltage conversion circuit includes a connector JP1, a fuse F1, a varistor RV, a safety capacitor CX1, a thermistor RT1, and a rectifier bridge ABS210; the connector JP1 is connected to 220V AC power and is connected in series with the fuse F1, the thermistor RT1, and the rectifier bridge ABS210 in sequence, and the varistor RV and the safety capacitor CX1 are connected in parallel between the fuse F1 and the thermistor RT1.

[0015] Preferably, the second voltage conversion circuit includes a power supply chip SD6834 and a transformer T1. The power input pin VCC of the power supply chip SD6834 is connected to the input terminal of the transformer T1, and the DRAIN pin is connected to the first voltage conversion circuit. The input terminal of the transformer T1 is connected to the first voltage conversion circuit.

[0016] Preferably, the second voltage conversion circuit further includes a feedback protection branch, which includes a Zener diode D5 and an optocoupler U2. The receiving end of the optocoupler U2 is connected to the FB pin of the power chip SD6834, and the transmitting end is connected to the 24V output voltage and the cathode of the Zener diode D5.

[0017] Preferably, the third voltage conversion circuit converts 24V DC to 5V DC through a power chip 78L05.

[0018] Implementing one of the above-described technical solutions of this utility model has the following advantages or beneficial effects:

[0019] This invention continuously adjusts the magnetic field strength of a Hall sensor by rotating a knob and using a magnet, and then continuously adjusts the motor speed through a speed controller. It features a simple structure, easy and convenient operation, high control precision, low cost, and ease of use. It is particularly suitable for precisely controlling the movement of a work platform along a single axis, thereby driving the cutting tool to perform object cutting operations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a circuit diagram of a motor speed control device based on a Hall effect knob and a Hall effect sensor according to an embodiment of this utility model.

[0022] Figure 2 This is a circuit diagram of the first motor magnet drive circuit of a motor speed control device based on a Hall effect knob according to an embodiment of this utility model.

[0023] Figure 3 This is a circuit diagram of the second motor magnet drive circuit of a motor speed control device based on a Hall effect knob according to an embodiment of this utility model.

[0024] Figure 4 This is a circuit diagram of the first voltage conversion module and the second voltage conversion module of a motor speed control device based on a Hall effect knob according to an embodiment of this utility model.

[0025] Figure 5 This is a circuit diagram of the third voltage conversion module of a motor speed control device based on a Hall effect knob according to an embodiment of this utility model;

[0026] Figure 6This is a schematic diagram of the circuit layout of a motor speed control device based on a Hall effect knob according to an embodiment of this utility model. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be adopted to implement this utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of this utility model disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] To illustrate the technical solution described in this utility model, specific embodiments are described below, showing only the parts related to the embodiments of this utility model.

[0030] Example:

[0031] like Figures 1-6As shown, this utility model provides a motor speed control device based on a Hall effect knob, including a voltage conversion module, a speed controller, a Hall sensor, a knob, and a magnet. The voltage conversion module converts 220V voltage into the operating voltage of the motor and the speed controller, providing power to the device. The knob and magnet are integrated, such as by gluing or snap-fit ​​connection. Preferably, the knob is a circular ring structure, with the magnet located at the edge of the ring structure, allowing both to rotate synchronously. The Hall sensor is positioned adjacent to the knob, meaning the magnet is also adjacent to the Hall sensor, influencing the Hall sensor's magnetic field. Changes in the knob's position cause changes in the magnetic field around the magnet, which in turn affects the magnetic field around the Hall sensor. Rotation of the knob causes the magnet to rotate synchronously. After the magnet's position changes, the distance and direction between the magnet and the Hall sensor change due to the inconvenience of maintaining the Hall sensor's position, thus continuously changing the magnetic field strength of the Hall sensor. Based on the continuous change in magnetic field strength, the Hall sensor outputs a continuously changing electrical signal strength based on the Hall effect, thereby continuously changing the signal strength input to the speed controller. The motor speed can be adjusted based on the change in the input signal strength. The Hall sensor continuously adjusts the signal strength input to the speed controller to achieve 0-100% range detection, thus enabling precise control of motor speed. This invention uses a rotary knob and magnet to continuously adjust the magnetic field strength of the Hall sensor, and then uses the speed controller to continuously adjust and control the motor speed. It features a simple structure, convenient operation, high control precision, low cost, and ease of use. It is particularly suitable for precisely controlling the movement of a work platform along a single axis, thereby driving the cutting tool to perform object cutting operations.

[0032] As an optional implementation method, such as Figure 1 As shown, the speed controller uses the FT61EC21B chip. The FT61EC21B chip has 8 pins and integrates an 8-bit analog-to-digital converter (ADC) and a pulse width modulator (PWM). It can acquire analog signals and output digital signals. Under normal operating conditions, its power consumption is only tens of milliwatts, effectively extending the system's lifespan. Employing a high-speed processing core, it can achieve high-speed data processing and computation, thus possessing the advantages of low power consumption and high performance. In the field of motor control, the PWM function of the FT61EC21B controller can be used to achieve motor speed regulation and control.

[0033] As an optional implementation method, such as Figure 1As shown, the Hall sensor includes Hall sensor H1 and Hall sensor H1B connected in parallel. Preferably, Hall sensor H1 and Hall sensor H1B are connected in parallel to achieve better signal input to the speed controller. The model of Hall sensor H1B is CC6503RST3. The VOUT pins of Hall sensor H1 and Hall sensor H1B are both connected to the AD / ISPCLK pin of the speed controller. The speed controller is used to identify the input signal strength of Hall sensor H1 and Hall sensor H1B. Based on the input signal strength, the speed controller outputs different speed control signals to control the motor speed.

[0034] As an optional implementation, the motor speed control device further includes a first motor magnet drive circuit and a second motor magnet drive circuit. The first and second motor magnet drive circuits are respectively connected to the MOTOR pin and MGT pin of the speed controller, and both drive the motor magnets through MOSFETs. Figure 2 As shown, in the first motor magnet drive circuit, the gate of the MOSFET Q1 is connected to the MOTOR pin of the speed controller, the source is grounded, and the drain is connected to a 24V voltage. When the MOTOR pin is high, the MOSFET Q1 is turned on, thus connecting the 24V voltage, which enables the motor magnet to engage and the motor to start. Figure 3 As shown, in the second motor magnet drive circuit, the gate of MOSFET Q2 is connected to the MGT pin of the speed controller, its source is grounded, and its drain is connected to a 24V voltage. When the MGT pin is high, MOSFET Q2 conducts, thus connecting the 24V voltage, enabling the motor magnet to engage and the motor to start. By alternately controlling the high and low levels of the MOTOR and MGT pins and their corresponding durations, the engagement time and frequency of the motor magnet can be controlled, achieving PWM speed regulation of the motor. Both the first and second motor magnet drive circuits can also quickly disconnect the motor power in abnormal situations to protect the equipment's safe operation. MOSFETs Q1 and Q2 are preferably NCE3080 models.

[0035] As an optional implementation, the voltage conversion module includes a first voltage conversion circuit, a second voltage conversion circuit, and a third voltage conversion circuit connected in sequence. The first voltage conversion circuit converts 220V AC power to 300V DC power, the second voltage conversion circuit converts 300V DC power to 24V DC power, and the 24V DC power can power the motor. The third voltage conversion circuit converts 24V DC power to 5V DC power, which can power the speed controller.

[0036] As an optional implementation method, such as Figure 4As shown, the first voltage conversion circuit includes a connector JP1, a fuse F1, a varistor RV, a safety capacitor CX1, a thermistor RT1, and a rectifier bridge ABS210. The connector JP1 is connected to 220V AC power. The connector JP1 is preferably a 3-pin connector and is connected in series with the fuse F1, the thermistor RT1, and the rectifier bridge ABS210 in sequence. The fuse F1 is preferably an MTS1100A, and the thermistor RT1 is preferably an FTR5D-9. The varistor RV and the safety capacitor CX1 are connected in parallel between the fuse F1 and the thermistor RT1. The varistor RV is preferably a 10D681K, and the safety capacitor CX1 has a capacitance of 0.1μF and an operating voltage of 275V. Preferably, resistors R1 and R4 are also connected in parallel between the varistor RV and the safety capacitor CX1. Resistors R1 and R4 are connected in series and both have a resistance of 510KΩ. The use of a varistor RV and a thermistor RT1 ensures the safety of the first voltage conversion circuit under high temperature and high pressure environments. Preferably, an inductor L1 with an inductance of 10μH is connected in series with the thermistor RT1 and the rectifier bridge ABS210. Preferably, the positive output terminal of the rectifier bridge ABS210 is connected to the positive terminal of the electrolytic capacitor CE1, and the negative output terminal is connected to the negative terminal of the electrolytic capacitor CE1.

[0037] As an optional implementation method, such as Figure 4 As shown, the second voltage conversion circuit includes a power supply chip SD6834 and a transformer T1. The power supply chip SD6834 is a current-mode PWM+PFM controller product with a built-in high-voltage MOSFET and external sampling resistor for switching power supplies. It has the advantages of low standby power consumption and low startup current. The power input pin VCC of the power supply chip SD6834 is connected to the input terminal of the transformer T1, and the DRAIN pins (pins 6, 7, and 8) are connected to the first voltage conversion circuit. The input terminal of the transformer T1 is connected to the output terminal of the first voltage conversion circuit, converting the 300V voltage to the 24V voltage. The second voltage conversion circuit also includes a feedback protection branch, which includes a Zener diode D5 and an optocoupler U2. The Zener diode D5 is preferably a BZT52C22, and the optocoupler U2 is preferably a PC817, which features high reliability, low cost, and ease of use. The receiving terminal of the optocoupler U2 is connected to the FB pin of the power supply chip SD6834 to achieve precise voltage control, and the transmitting terminal is connected to the 24V output voltage and the cathode of the Zener diode D5.

[0038] As an optional implementation method, such as Figure 5As shown, the third voltage conversion circuit converts 24V DC to 5V DC using a 78L05 power supply chip. The 78L05 is a 5V fixed-voltage three-terminal integrated voltage regulator with a maximum output current of 0.1 A and a maximum input voltage of 30V. It features easy installation, low power consumption, good stability, strong adaptability, good current limiting and thermal shutdown characteristics, lightweight design, and internal short-circuit and overheat protection, increasing circuit safety and preventing damage due to short circuits or overheating. Specifically, the Vin terminal of the 78L05 is connected to the 24V input voltage through parallel resistors R21 and R22, and a capacitor C4 is connected in parallel between resistors R21 and R22 and the Vin terminal. The Vout terminal of the 78L05 is connected to the 5V output voltage and a capacitor C5 is connected in parallel. The GND terminal of the 78L05 is grounded.

[0039] The embodiment is merely a special case and does not indicate that this utility model is implemented in such a way.

[0040] The above description is merely a preferred embodiment of the present utility model. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Furthermore, under the teachings of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present utility model.

Claims

1. A motor speed control device based on a Hall effect knob, characterized in that, The device includes a voltage conversion module, a speed controller, a Hall sensor, a knob, and a magnet. The voltage conversion module converts 220V voltage into the operating voltage for the motor and the speed controller. The knob and magnet are integrated, and the Hall sensor is positioned adjacent to the knob. Rotating the knob causes the magnet to rotate synchronously, continuously changing the magnetic field strength of the Hall sensor. Based on the continuous change in magnetic field strength, the Hall sensor continuously changes the signal strength input to the speed controller to adjust the motor speed.

2. The motor speed control device based on a Hall effect knob according to claim 1, characterized in that, The speed controller uses a chip model of FT61EC21B.

3. The motor speed control device based on a Hall effect knob according to claim 2, characterized in that, The Hall sensor includes Hall sensor H1 and Hall sensor H1B connected in parallel. The Hall sensor H1B is model CC6503RST3. The VOUT pins of both Hall sensor H1 and Hall sensor H1B are connected to the AD / ISPCLK pin of the speed controller.

4. The motor speed control device based on a Hall effect knob according to claim 2, characterized in that, The motor speed control device further includes a first motor magnet drive circuit and a second motor magnet drive circuit. The first motor magnet drive circuit and the second motor magnet drive circuit are respectively connected to the MOTOR pin and MGT pin of the speed controller, and both drive the motor magnet through MOS transistors.

5. A motor speed control device based on a Hall effect knob according to claim 4, characterized in that, The gate of the MOSFET Q1 in the first motor magnet drive circuit is connected to the MOTOR pin of the speed controller, the source is grounded, and the drain is connected to 24V. The gate of the MOSFET Q2 in the second motor magnet drive circuit is connected to the MGT pin of the speed controller, the source is grounded, and the drain is connected to 24V.

6. The motor speed control device based on a Hall effect knob according to claim 1, characterized in that, The voltage conversion module includes a first voltage conversion circuit, a second voltage conversion circuit, and a third voltage conversion circuit connected in sequence. The first voltage conversion circuit converts 220V AC power to 300V DC power, the second voltage conversion circuit converts 300V DC power to 24V DC power, and the third voltage conversion circuit converts 24V DC power to 5V DC power.

7. A motor speed control device based on a Hall effect knob according to claim 6, characterized in that, The first voltage conversion circuit includes a connector JP1, a fuse F1, a varistor RV, a safety capacitor CX1, a thermistor RT1, and a rectifier bridge ABS210. The connector JP1 is connected to 220V AC power and is connected in series with the fuse F1, the thermistor RT1, and the rectifier bridge ABS210 in sequence. The varistor RV and the safety capacitor CX1 are connected in parallel between the fuse F1 and the thermistor RT1.

8. A motor speed control device based on a Hall effect knob according to claim 6, characterized in that, The second voltage conversion circuit includes a power chip SD6834 and a transformer T1. The power input pin VCC of the power chip SD6834 is connected to the input terminal of the transformer T1, and the DRAIN pin is connected to the first voltage conversion circuit. The input terminal of the transformer T1 is connected to the first voltage conversion circuit.

9. A motor speed control device based on a Hall effect knob according to claim 8, characterized in that, The second voltage conversion circuit also includes a feedback protection branch, which includes a Zener diode D5 and an optocoupler U2. The receiving end of the optocoupler U2 is connected to the FB pin of the power chip SD6834, and the transmitting end is connected to the 24V output voltage and the cathode of the Zener diode D5.

10. A motor speed control device based on a Hall effect knob according to claim 6, characterized in that, The third voltage conversion circuit converts 24V DC to 5V DC through a power chip 78L05.

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