Low voltage dc brushless levitation gate controller

Abstract

The utility model relates to the technical field of suspension door controller, concretely to low pressure direct current brushless suspension door controller, include: wide voltage DC / DC module, its input end access 24V~48V power, output 12V direct current voltage, 5V linear voltage stabilizing circuit, its input end is connected with the 12V output of wide voltage DC / DC module, and output end exports 5V direct current voltage. In the utility model, adopt direct current brushless motor, can realize stepless speed regulation, and starting torque is big, and power factor is high, and efficiency is high, can make suspension door in low speed - high speed - low speed arbitrary smooth switching, and running noise is reduced obviously, can reduce mechanical wear and tear, prolong integral machinery life, simultaneously, it need not rely on operating capacitor, is not affected by the influence of the capacitor capacity drop under low temperature environment, can stably operate in various severe weather, and can satisfy long time continuous work demand, solve the existing single -phase alternating -current motor torque unstable, speed is difficult to control, error accumulation influence precision and the problem of normal operation under low temperature.

Description

Technical Field

[0001] This utility model relates to the field of suspended door controller technology, specifically a low-voltage DC brushless suspended door controller. Background Technology

[0002] Suspended gates, which operate without wheels or pre-embedded tracks and run in mid-air, are widely used at the entrances and exits of factories, residential communities, and construction sites. Their core features are trackless operation, safety protection, and durability. Trackless operation relies on an intelligent control system to achieve suspended movement, adapting to complex ground environments. For safety, they are equipped with infrared sensors for anti-collision / anti-pinch, anti-climb alarms, and emergency stop functions. In terms of durability, they are made of high-strength aluminum alloy or carbon steel with anti-corrosion treatment, ensuring a service life of over 10 years. They are an important piece of equipment in modern access control that combines practicality and safety.

[0003] Currently, the drive and control technologies for suspended gates are mainly divided into two categories. Most products adopt a single-phase AC single-machine control scheme, using a single-phase AC motor to drive the gate, relying on the motor's own characteristics and simple control logic to achieve basic opening and closing actions. Some high-end products use three-phase asynchronous motors or permanent magnet servo synchronous motors to improve performance. Among them, three-phase asynchronous motors require a dedicated controller for drive, while permanent magnet servo synchronous motors mostly use general-purpose controllers. At the same time, an independent gate status detection and control controller needs to be configured to complete functions such as gate operation status monitoring and safety protection.

[0004] In traditional technologies, single-phase AC single-machine control schemes suffer from low power factor, low efficiency, unstable torque, and difficulty in precise speed control, leading to error accumulation that affects operational accuracy. Furthermore, due to reliance on operating capacitors, the reduced capacitance in low-temperature environments can directly cause the motor to malfunction, failing to meet the requirements for long-term stable operation and complex environments. While three-phase asynchronous motors improve performance to some extent, they suffer from drawbacks such as low starting torque, large motor size, and high overall cost of the controller and motor. Although permanent magnet servo synchronous motors offer better performance, they require a general-purpose controller and an additional door status detection controller, resulting in high costs. Moreover, their 220V operating voltage poses a risk of leakage current, making it impossible to balance safety and economy.

[0005] Therefore, we propose a low-voltage DC brushless floating door controller. Utility Model Content

[0006] The purpose of this invention is to provide a low-voltage DC brushless floating door controller to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a low-voltage DC brushless suspended door controller, comprising:

[0008] The wide voltage DC / DC module can be connected to a 24V~48V power supply at its input terminal and outputs a 12V DC voltage at its output terminal.

[0009] The 5V linear voltage regulator circuit connects its input terminal to the 12V output terminal of the wide voltage DC / DC module and outputs a 5V DC voltage.

[0010] The 3.3V linear regulator circuit has its input terminal connected to the 5V output terminal of the 5V linear regulator circuit, and its output terminal outputs a 3.3V DC voltage.

[0011] The CPU is electrically connected to a wide-voltage DC / DC module, a 5V linear regulator circuit, and a 3.3V linear regulator circuit, respectively, and receives the corresponding operating voltage.

[0012] The input terminal of the MOSFET driver circuit is connected to the CPU's 6-channel PWM signal output terminal;

[0013] The input terminal of the three-phase inverter MOSFET circuit is connected to the output terminal of the MOSFET driver circuit, and the output terminal is connected to the BLDC motor.

[0014] The current sensor's input terminal is connected to the output terminal of the three-phase inverter MOSFET circuit, and its output terminal is connected to the CPU.

[0015] The analog filter circuit has its input terminal connected to the 3 Hall signal output terminals of the BLDC motor, and its output terminal connected to the CPU.

[0016] Protection and filtering circuits thirteen (13), fourteen (14), fifteen (15), sixteen (16), and seventeen (17) are provided. The input terminal of protection and filtering circuit thirteen (13) is connected to the open limit sensor, the input terminal of protection and filtering circuit fourteen (14) is connected to the closed limit sensor, the input terminal of protection and filtering circuit fifteen (15) is connected to the anti-collision infrared signal, the input terminal of protection and filtering circuit sixteen (16) is connected to the anti-climb infrared signal, and the input terminal of protection and filtering circuit seventeen (17) is connected to the open, close, and stop signals. The output terminals of the above protection and filtering circuits are all connected to the CPU.

[0017] As a preferred technical solution, it also includes a Bluetooth module and an RS-485 conversion module. The input terminal of the Bluetooth module is connected to the CPU, and the input terminal of the RS-485 conversion module is connected to the CPU, which are used to realize communication between the CPU and external Bluetooth devices and external devices, respectively.

[0018] As a preferred technical solution, a wireless remote control receiver module is also included. The input end of the wireless remote control receiver module receives signals from an external remote control, and the output end is connected to the CPU to transmit the decoded remote control signal to the CPU.

[0019] As a preferred technical solution, the system further includes a button circuit and a display circuit. The output terminal of the button circuit is connected to the CPU for inputting parameter commands; the input terminal of the display circuit is connected to the CPU for displaying system information.

[0020] As a preferred technical solution, both the open-position limit sensor and the closed-position limit sensor are Hall effect proximity switch sensors, which are used in conjunction with the open-position magnet and the closed-position magnet installed at appropriate positions on the suspended door.

[0021] As a preferred technical solution, both the anti-collision infrared signal and the anti-climb infrared signal are through-beam infrared sensors. The protection and filtering circuit 15 and the protection and filtering circuit 16 protect and filter their output signals before transmitting them to the CPU.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] Compared to the single-phase AC motors used in most existing suspended gates, this invention uses a DC brushless motor, which enables stepless speed regulation, high starting torque, high power factor, and high efficiency. It allows the suspended gate to smoothly switch between low-speed, high-speed, and low-speed operation, significantly reducing operating noise, minimizing mechanical wear, and extending overall mechanical lifespan. Furthermore, it does not rely on a running capacitor and is unaffected by capacitor capacity reduction in low-temperature environments. It can operate stably in various harsh weather conditions and meet the requirements for long-term continuous operation. This solves the problems of unstable torque, difficult speed control, error accumulation affecting accuracy, and inability to operate normally at low temperatures associated with existing single-phase AC motors.

[0024] In existing high-end products, three-phase asynchronous motors and permanent magnet servo synchronous motors require a general-purpose controller and an additional door status detection controller, resulting in high costs and complex installation and debugging. This utility model integrates the control function of a DC brushless motor with the acquisition and control function of the suspended door's operating status parameters. Door status monitoring and motor control can be achieved through a single controller, eliminating the need for a separate controller, significantly reducing the overall cost of the complete set of equipment, while simplifying the installation and debugging process and improving ease of operation.

[0025] Existing permanent magnet servo synchronous motors operate at 220V, posing a potential safety hazard due to leakage. This invention utilizes a wide voltage range of 24V-48V, with both the controller and motor operating at safe voltages. This effectively avoids the risk of leakage from high voltage, enhancing the safety of the equipment during use. It is particularly suitable for locations with frequent personnel activity, such as factories, residential areas, and construction sites.

[0026] This utility model adopts a wide voltage design scheme. Through the wide voltage DC / DC module, it can be adapted to motors with different voltages from 24V to 48V. There is no need to design a separate controller for motors with specific voltages, which enhances the versatility and flexibility of the equipment, meets the diverse needs of motor voltage in different scenarios, and reduces the selection and replacement costs for users. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of 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 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.

[0028] Figure 1 This is a system structure diagram of the present invention. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] According to the appendix Figure 1 As shown, this utility model embodiment provides a low-voltage DC brushless floating door controller, including:

[0031] Wide voltage DC / DC module 1, its input terminal is connected to a 24V~48V power supply, and its output terminal outputs a 12V DC voltage;

[0032] The 5V linear regulator circuit 2 has its input terminal connected to the 12V output terminal of the wide voltage DC / DC module 1, and its output terminal outputs a 5V DC voltage.

[0033] The 3.3V linear regulator circuit 3 has its input terminal connected to the 5V output terminal of the 5V linear regulator circuit 2, and its output terminal outputs a 3.3V DC voltage.

[0034] CPU4 is electrically connected to wide voltage DC / DC module 1, 5V linear regulator circuit 2, and 3.3V linear regulator circuit 3 respectively, and receives the corresponding operating voltage.

[0035] The input terminal of the MOSFET driver circuit 5 is connected to the 6-channel PWM signal output terminal of the CPU4.

[0036] The input terminal of the three-phase inverter MOSFET circuit 6 is connected to the output terminal of the MOSFET drive circuit 5, and the output terminal is connected to the BLDC motor.

[0037] Current sensor 7, its input terminal is connected to the output terminal of the three-phase inverter MOS transistor circuit 6, and its output terminal is connected to CPU4;

[0038] The analog filter circuit 8 has its input terminal connected to the 3 Hall signal output terminals of the BLDC motor and its output terminal connected to the CPU 4.

[0039] Protection and filtering circuits thirteen (13), fourteen (14), fifteen (15), sixteen (16), and seventeen (17) are provided. The input terminal of protection and filtering circuit thirteen (13) is connected to the open limit sensor 22, the input terminal of protection and filtering circuit fourteen (14) is connected to the closed limit sensor 23, the input terminal of protection and filtering circuit fifteen (15) is connected to the anti-collision infrared signal 24, the input terminal of protection and filtering circuit sixteen (16) is connected to the anti-climb infrared signal 25, and the input terminal of protection and filtering circuit seventeen (17) is connected to the open, close, and stop signal 26. The output terminals of the above protection and filtering circuits are all connected to CPU4.

[0040] It also includes a Bluetooth module 9 and an RS-485 conversion module 10. The input terminal of the Bluetooth module 9 is connected to the CPU 4, and the input terminal of the RS-485 conversion module 10 is connected to the CPU 4, which are used to realize communication between the CPU 4 and external Bluetooth devices and external devices, respectively.

[0041] It also includes a wireless remote control receiver module 11, whose input end receives external remote control signals and whose output end is connected to the CPU4, for transmitting the decoded remote control signals to the CPU4.

[0042] It also includes a button circuit 20 and a display circuit 19. The output of the button circuit 20 is connected to the CPU 4 and is used to input parameter commands; the input of the display circuit 19 is connected to the CPU 4 and is used to display system information.

[0043] Both the open limit sensor 22 and the closed limit sensor 23 are Hall effect proximity switches, which are used in conjunction with the open and closed magnets installed at appropriate positions on the suspended door.

[0044] Both the anti-collision infrared signal 24 and the anti-climb infrared signal 25 are through-beam infrared sensors. The protection and filtering circuit 15 and the protection and filtering circuit 16 protect and filter their output signals before transmitting them to the CPU4.

[0045] The overall system is based on CPU4, which enables comprehensive control and status monitoring of the suspended door. The specific structure and working principle are as follows:

[0046] The controller supports a wide voltage range of 24V to 48V. In the power supply system, the wide-voltage DC / DC module 1 receives an external 24V~48V DC input power supply and converts it into a 12V DC voltage. This 12V voltage provides power to the circuits in the system that require 12V power, and is also supplied to the 5V linear regulator circuit 2. The 5V linear regulator circuit 2 further regulates the 12V voltage to output a 5V DC voltage. This 5V voltage not only powers the circuits in the system that require 5V power, but is also supplied to the 3.3V linear regulator circuit 3. The 3.3V linear regulator circuit 3 finally outputs a 3.3V DC voltage, providing stable power to the circuits in the system that require 3.3V power. Through three-stage voltage conversion and regulation, it is ensured that all circuits in the system can obtain a suitable and stable operating voltage, thus guaranteeing the stable operation of the system.

[0047] As the core control unit, CPU4 outputs 6 PWM signals, which first enter the MOSFET drive circuit 5. After being processed by this circuit, the signals drive the three-phase inverter MOSFET circuit 6. The output of the three-phase inverter MOSFET circuit 6 is directly connected to the BLDC motor to provide power for the motor's operation.

[0048] Meanwhile, the current sensor 7 detects the motor's operating current in real time and feeds back the detected current signal to the CPU4, enabling the CPU4 to monitor the motor's current status in real time and ensure that the motor operates within a safe range.

[0049] In addition, the three Hall signals output by the BLDC motor are first filtered by the analog filter circuit 8 to remove noise interference before being transmitted to the CPU4. The CPU4 measures and analyzes these three Hall signals to accurately obtain the position of the motor rotor and the real-time speed of the motor. Based on this information, the CPU4 dynamically adjusts the output PWM signal to achieve closed-loop control of the motor and ensure the stability and accuracy of the motor operation.

[0050] In terms of communication and control interaction, the controller is equipped with a variety of modules to meet the needs of different scenarios: Bluetooth module 9 is connected to CPU4, enabling CPU4 to establish a communication connection with external Bluetooth devices. Through a mobile app, not only can the floating door be remotely controlled, but system parameters can also be modified and set; RS-485 conversion module 10 is also connected to CPU4. With the help of this module, CPU4 can interact with external devices. External devices can operate the controller by sending control commands, and can also modify system parameters.

[0051] The wireless remote control receiver module 11 is connected to the CPU4 and can receive the wireless signal emitted by the remote control and transmit the signal to the CPU4 for decoding. The CPU4 executes the corresponding operation according to the decoding result to realize the wireless remote control function of the suspended door. At the same time, the CPU4 is connected to the external controlled device through 3-channel IO control output 12, and can control these external devices according to the system operating status or preset logic, thus expanding the functional application of the controller.

[0052] In terms of status detection and safety protection, the controller integrates multiple sensors and signal processing circuits: the open limit sensor 22 is a Hall effect proximity switch sensor, and an open limit magnet is installed at an appropriate position on the suspended door. When the suspended door moves to the open position, the open limit magnet approaches the open limit sensor 22, at which time the open limit sensor 22 outputs a low-level signal. This signal is processed by the protection and filtering circuit 13 and then transmitted to the CPU4. After receiving the signal, the CPU4 controls the motor to stop running, ensuring that the suspended door stops accurately at the open position; the closed limit sensor 23 is also a Hall effect proximity switch sensor, and a closed limit magnet is installed at the corresponding position. When the suspended door moves to the closed position, the closed limit magnet approaches the closed limit sensor 23, and its output low-level signal is processed by the protection and filtering circuit 14 and then transmitted to the CPU4. The CPU4 controls the motor to stop accordingly, realizing precise control of the closed position.

[0053] The anti-collision infrared signal 24 is provided by a through-beam infrared sensor. During the closing process, if an object blocks the infrared signal, the anti-collision infrared signal 24 will output a corresponding signal. This signal is processed by the protection and filtering circuit 15 and then transmitted to the CPU4. Upon receiving the signal, the CPU4 immediately controls the motor to reverse, causing the suspended door to stop closing and run in the opposite direction to avoid collisions with objects. The anti-climb infrared signal 25 is a through-beam infrared sensor. When the door is closed, if an object blocks its infrared signal, the signal output by the anti-climb infrared signal 25 is processed by the protection and filtering circuit 16 and then transmitted to the CPU4. U4 and CPU4 can trigger alarms or other preset protection actions to achieve anti-climbing function. In addition, the open, close and stop signals 26 are processed by the protection and filtering circuit 17 and then transmitted to CPU4. CPU4 performs corresponding door opening, closing or stop operations according to these signals. The protection and filtering circuits 13, 14, 15, 16, and 17 can all protect and filter the input signals, remove interference signals, and ensure the accuracy and stability of signal transmission.

[0054] In terms of human-computer interaction, CPU4 is connected to a button circuit 20 and a display circuit 19. The button circuit 20 allows users to input parameter commands or modify parameters via buttons, and the information after the operation is displayed in real time through the display circuit 19, realizing convenient human-computer interaction and facilitating user debugging and operation of the controller. At the same time, the voltage measurement circuit 18 monitors the voltage status of the input power supply in real time and feeds the measurement results back to CPU4. CPU4 can perform corresponding protection or adjustment based on the voltage information to further ensure the safe and stable operation of the system.

[0055] Through the coordinated operation of the above components, the controller achieves precise control, status monitoring, and safety protection for the low-voltage DC brushless suspended door, with high integration and complete functions.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-voltage DC brushless suspended door controller, characterized in that: include: A wide voltage DC / DC module (1) has a 24V~48V power supply connected to its input terminal and a 12V DC voltage output terminal; The 5V linear voltage regulator circuit (2) has its input terminal connected to the 12V output terminal of the wide voltage DC / DC module (1) and outputs a 5V DC voltage. The 3.3V linear regulator circuit (3) has its input terminal connected to the 5V output terminal of the 5V linear regulator circuit (2), and its output terminal outputs a 3.3V DC voltage. CPU (4) is electrically connected to wide voltage DC / DC module (1), 5V linear regulator circuit (2) and 3.3V linear regulator circuit (3) respectively, and receives the corresponding working voltage; The input terminal of the MOS transistor driving circuit (5) is connected to the 6-channel PWM signal output terminal of the CPU (4); The input terminal of the three-phase inverter MOSFET circuit (6) is connected to the output terminal of the MOSFET drive circuit (5), and the output terminal is connected to the BLDC motor. The current detection (7) has its input terminal connected to the output terminal of the three-phase inverter MOS transistor circuit (6) and its output terminal connected to the CPU (4); The analog filter circuit (8) has its input end connected to the 3 Hall signal output ends of the BLDC motor and its output end connected to the CPU (4). Protection and filtering circuit thirteen (13), protection and filtering circuit fourteen (14), protection and filtering circuit fifteen (15), protection and filtering circuit sixteen (16), and protection and filtering circuit seventeen (17). The input terminal of protection and filtering circuit thirteen (13) is connected to the open limit sensor (22), the input terminal of protection and filtering circuit fourteen (14) is connected to the closed limit sensor (23), the input terminal of protection and filtering circuit fifteen (15) is connected to the anti-collision infrared signal (24), the input terminal of protection and filtering circuit sixteen (16) is connected to the anti-climb infrared signal (25), and the input terminal of protection and filtering circuit seventeen (17) is connected to the open, close, and stop signal (26). The output terminals of the above protection and filtering circuits are all connected to the CPU (4).

2. The low-voltage DC brushless floating door controller according to claim 1, characterized in that: It also includes a Bluetooth module (9) and an RS-485 conversion module (10). The input terminal of the Bluetooth module (9) is connected to the CPU (4), and the input terminal of the RS-485 conversion module (10) is connected to the CPU (4), which are used to realize communication between the CPU (4) and external Bluetooth devices and external devices, respectively.

3. The low-voltage DC brushless floating door controller according to claim 1, characterized in that: It also includes a wireless remote control receiver module (11), whose input end receives external remote control signals and whose output end is connected to the CPU (4) to transmit the decoded remote control signal to the CPU (4).

4. The low-voltage DC brushless suspended door controller according to claim 1, characterized in that: It also includes a button circuit (20) and a display circuit (19). The output of the button circuit (20) is connected to the CPU (4) for inputting parameter instructions; the input of the display circuit (19) is connected to the CPU (4) for displaying system information.

5. The low-voltage DC brushless suspended door controller according to claim 1, characterized in that: The open limit sensor (22) and the closed limit sensor (23) are both Hall effect proximity switch sensors, which are used in conjunction with the open and closed magnets installed at appropriate positions on the suspended door.

6. The low-voltage DC brushless suspended door controller according to claim 1, characterized in that: The anti-collision infrared signal (24) and the anti-climb infrared signal (25) are both through-beam infrared sensors. The protection and filtering circuit fifteen (15) and the protection and filtering circuit sixteen (16) protect and filter their output signals and then transmit them to the CPU (4).

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