Motor control device based on direct-current low-voltage power line carrier technology

Abstract

The utility model relates to the technical field of motor control, in particular to a motor control device based on a direct-current low-voltage power line carrier technology, which realizes integration of signal transmission and power supply functions by modulating control signals onto a direct-current power line, thereby simplifying wiring, reducing cost and improving stability and expansibility of a system. According to the utility model, through the optimization of the technical scheme, the communication capability, the expansion capability and the stability of the system are obviously improved while the system structure is simplified, and an efficient solution is provided for the development of the intelligent control technology.

Description

Technical Field

[0001] This utility model relates to the field of motor control technology, and in particular to a motor control device based on DC low-voltage power line carrier technology. Background Technology

[0002] In traditional motor control systems, control signals and power supply voltage are typically transmitted via separate signal lines and power supply lines. This wiring method suffers from problems such as complex wiring, high installation and maintenance costs, limited communication distance, and poor system stability, making it difficult to meet the demands of modern intelligent control systems for efficiency and flexibility.

[0003] With the development of DC low-voltage power line carrier (PLC) technology, it has become possible to simultaneously transmit electrical energy and control signals using power lines. PLC technology superimposes control signals onto power lines through modulation and demodulation, which not only simplifies system wiring and significantly reduces hardware costs, but also supports longer signal transmission distances, up to 500 meters. Furthermore, PLC technology in DC low-voltage environments provides stable power supply and reliable signal transmission, making it particularly suitable for smart home and industrial control applications.

[0004] While existing motor control systems can achieve signal transmission and control through independent modules, they have the following shortcomings:

[0005] 1. The signal transmission module and motor control module are designed independently, which increases the complexity of the system.

[0006] 2. The system lacks effective suppression of bus signal interference and is easily affected by external electromagnetic interference.

[0007] 3. The motor control system lacks scalability, making it difficult to achieve unified control and management of multi-node equipment.

[0008] Therefore, designing a motor control device based on DC low-voltage power line carrier technology that can integrate signal and power supply while meeting the requirements of high efficiency, stability and scalability has become an urgent technical problem to be solved in this field. Summary of the Invention

[0009] The purpose of this invention is to provide a motor control device based on DC low-voltage power line carrier technology. By modulating the control signal onto the DC power line, the signal transmission and power supply functions are integrated, thereby simplifying wiring, reducing costs, and improving the stability and scalability of the system.

[0010] The technical solution of this utility model is as follows: a motor control device based on DC low-voltage power line carrier technology, comprising:

[0011] The main controller includes a first modem, a power module, and a microcontroller unit (MCU), which generates control signals, modulates the control signals into power line carrier signals through the first modem, and sends them to the power line.

[0012] The slave controller includes a second modem and a motor control interface. The second modem is used to receive power line carrier signals in the power line and demodulate them into control signals. The motor control interface adjusts the motor's start, stop, forward and reverse rotation, and speed regulation functions according to the demodulated control signals.

[0013] The stabilizer module, connected to the main controller, is used for filtering and providing a stable power supply voltage;

[0014] The power module provides a stable power supply to the master controller and slave controllers, supporting low-voltage power supply of DC10-60V;

[0015] Power lines are used to connect the master controller and the slave controller, and to transmit power signals and power line carrier signals.

[0016] Preferably, the main controller integrates a DC low-voltage power line carrier communication module, adopts half-duplex communication mode, has a baud rate of 9600bps, and the data format includes 1 start bit, 8 data bits and 1 stop bit.

[0017] Preferably, the stabilizer module eliminates ripple interference through an RLC filter network and supports a voltage range of DC10-60V.

[0018] Preferably, the master controller is connected to multiple slave controllers via a daisy chain topology, supporting a maximum of 256 slave controller nodes.

[0019] Preferably, the motor controller receives signals transmitted by the main controller through a UART communication interface and realizes the motor's start, stop, forward and reverse rotation, and speed regulation functions.

[0020] Preferably, the slave controller includes an address setting module for assigning a unique address to each slave controller, ensuring that the master controller can accurately identify and control the corresponding slave controller.

[0021] Preferably, the main controller integrates overload protection, ESD protection, and timeout protection functions to ensure the stability and reliability of communication.

[0022] The DC low-voltage power line carrier control motor device of this utility model achieves its operation through the following steps:

[0023] The main controller sends control signals: The main controller converts the control commands (such as motor start, stop, forward / reverse, or speed adjustment instructions) into data signals. These data signals are modulated by the integrated DC low-voltage power line carrier module within the main controller, superimposing the control signals onto the DC power line to achieve synchronous transmission of signals and electrical energy.

[0024] Signal transmission and power supply: The modulated data signal and DC power supply voltage are transmitted to the target controller via the same power line. During transmission, the stabilizer module smooths the power supply voltage through an RLC filter network, filtering out power ripple and interference to ensure the stability of power line signal transmission.

[0025] Signal reception from the controller: After receiving the data signal from the power line from the controller, the target demodulates it through its integrated DC low-voltage power line carrier module to extract the control command. Based on the set unique address, the controller identifies whether it is its target signal and executes the corresponding action.

[0026] The motor controller executes actions: The demodulated control signal is transmitted to the motor controller via the UART interface. The motor controller performs corresponding functions based on the received instructions, including starting, stopping, forward / reverse rotation, or speed adjustment.

[0027] Multi-node communication and expansion: The master controller connects to multiple slave controllers via a daisy-chain topology. All slave controllers communicate via DC power lines, each receiving and executing corresponding control commands based on a unique address. The system supports up to 256 slave controller nodes, adapting to the needs of multi-device scenarios.

[0028] Real-time monitoring of communication and power supply: The main controller monitors the communication and power supply status in real time. If a communication failure or power supply abnormality is detected, the timeout protection function is triggered, and the system is notified through a modulation signal for timely handling.

[0029] Through the above-described process, this invention achieves integrated signal transmission and power supply, simplifying wiring and enhancing system stability and reliability. Simultaneously, it supports multi-node communication and multi-functional motor control, providing an efficient solution for smart home and industrial control applications.

[0030] This invention, through a design based on DC low-voltage power line carrier technology, achieves the integration of signal transmission and power supply, resulting in a significant improvement in technical performance. Compared with existing technologies, it has the following advantages and technical effects:

[0031] Simplified wiring and reduced costs: This device avoids the complexity of separate wiring of signal lines and power lines in traditional systems by superimposing control signals on DC power lines, thereby significantly reducing the material and installation costs required for wiring.

[0032] Stable and reliable power supply and communication: This device uses an RLC filter network through a stabilizer module to effectively eliminate power ripple and load interference, ensuring stable transmission of communication signals and reliable power supply. Even in complex electromagnetic environments, it can maintain normal operation of the system.

[0033] Supports multi-node expansion: This device adopts a daisy-chain topology, and the main controller can support the management of up to 256 slave controllers. Each slave controller has a unique address, which can realize precise control and unified management of multiple nodes, and is suitable for the multi-device control needs of complex scenarios.

[0034] Multifunctional motor control: The motor controller can receive commands from the main controller to perform multiple functions such as start, stop, forward and reverse rotation, and speed adjustment. This function not only improves the intelligence of motor control but also enhances its adaptability to different application scenarios.

[0035] High-efficiency communication capability: The DC low-voltage power line carrier module adopts half-duplex communication mode, supports data transmission at a baud rate of 9600bps, and has overload protection, ESD protection and timeout protection functions, which further improves the efficiency and reliability of communication.

[0036] High safety and long life design: This device reduces the risk of communication errors caused by abnormal current and voltage fluctuations through overload protection, ESD protection, and timeout protection.

[0037] Wide applicability: This device supports a DC power supply range of 10-60V, making it suitable for various application scenarios such as smart homes, industrial automation, and building control, and has broad market applicability.

[0038] In summary, this utility model, through the optimization of the technical solution, significantly improves the system's communication capabilities, scalability, and stability while simplifying the system structure, providing an efficient solution for the development of intelligent control technology. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0040] Figure 2 This is a circuit diagram of the main controller of this utility model;

[0041] Figure 3 This is a circuit diagram of the controller of this utility model.

[0042] Figure 2 The circuit wiring is too complex, so the wiring relationships are described as follows:

[0043] 1. Main power supply and power supply section

[0044] Main power inputs (DC+ and DC-): Connect to the input terminals of the regulator module: the Vin pin of VR1. The regulated 5V output is connected to the system's VCC bus to power subsequent modules.

[0045] 2. PLC modem module:

[0046] Input terminals (DC+ and DC- of P1 and P2): Connect to the main power supply lines (BUS_P and BUS_N).

[0047] Outputs (U2 - PLC Modem Chip): Data Bus Input: BUS_AI and BUS_BI are connected to the signal input pins of U2. Demodulation Output: U2's UART_TX and UART_RX are connected to the TX and RX pins of the MCU respectively for communication with the main control MCU.

[0048] Filtering components: Inductors (LP1, LP2) are connected in series across BUS_P and BUS_N to filter out bus noise. Capacitors (such as C4, C5) are connected in parallel across the bus to further smooth the bus voltage.

[0049] 3. Main Controller (MCU)

[0050] Power supply pins (VCC and GND): VCC is connected to the 5V power supply, and GND is connected to the common ground.

[0051] UART communication: RX and TX are connected to UART_TX and UART_RX of PLC module U2, respectively.

[0052] PWM Output: The PWM output pin is connected to the control pin of the motor driver chip (such as PWM_LED1, PWM_LED2).

[0053] Control signal input: 1. The function key and switch button signals of the button interface (J3, J4, J5, J6) are connected to the GPIO pin of the MCU through resistors (such as R13 to R36).

[0054] 2. The DI and RO pins of the RS485 interface chip (U7) are connected to the TX and RX pins of the MCU respectively to enable communication with the touch screen.

[0055] 4. RS485 communication module

[0056] The communication chip (MAX485EESA) has DI (data input) and RO (data output) pins connected to the MCU's TX and RX pins, respectively. The A and B differential signal pins are connected to the RS485 bus for communication with the touchscreen. DE and RE pins control the communication direction and are typically adjusted by the MCU's control pins.

[0057] 5. Motor drive module

[0058] PWM signal input: The PWM output pin of the MCU (such as PWM_LED1) is connected to the control input of the driver chip.

[0059] Power supply and protection: The VCC pin of the driver chip is connected to a 5V power supply. The driver output is connected to the positive and negative terminals of the LED motor through filter capacitors (such as C12 and C13) and protection resistors (such as R7 and R8).

[0060] 6. Bus and Expansion Interface

[0061] Bus connection: The master controller's BUS_P and BUS_N are connected to the bus input terminals of all slave controllers respectively.

[0062] Expansion Interfaces: J3 to J6 provide multiple 8-pin interfaces, each of which can connect to a group of motors or motor controllers. The specific pin functions are identified by the assigned addresses. Detailed Implementation

[0063] Example 1:

[0064] A motor control device based on DC low-voltage power line carrier technology includes:

[0065] The main controller includes a first modem, a power module, and a microcontroller unit (MCU), which generates control signals, modulates the control signals into power line carrier signals through the first modem, and sends them to the power line.

[0066] The slave controller includes a second modem and a motor control interface. The second modem is used to receive power line carrier signals in the power line and demodulate them into control signals. The motor control interface adjusts the motor's start, stop, forward and reverse rotation, and speed regulation functions according to the demodulated control signals.

[0067] The stabilizer module, connected to the main controller, is used for filtering and providing a stable power supply voltage;

[0068] The power module provides a stable power supply to the master controller and slave controllers, supporting low-voltage power supply of DC10-60V;

[0069] Power lines are used to connect the master controller and the slave controller, and to transmit power signals and power line carrier signals.

[0070] Example 2:

[0071] The difference between this embodiment and Embodiment 1 is that this embodiment also includes the following technical features:

[0072] The main controller integrates a DC low-voltage power line carrier communication module, which adopts half-duplex communication mode, with a baud rate of 9600bps and a data format including 1 start bit, 8 data bits and 1 stop bit.

[0073] Preferably, the stabilizer module eliminates ripple interference through an RLC filter network and supports a voltage range of DC10-60V.

[0074] Preferably, the master controller is connected to multiple slave controllers via a daisy chain topology, supporting a maximum of 256 slave controller nodes.

[0075] Preferably, the motor controller receives signals transmitted by the main controller through a UART communication interface and realizes the motor's start, stop, forward and reverse rotation, and speed regulation functions.

[0076] Preferably, the slave controller includes an address setting module for assigning a unique address to each slave controller, ensuring that the master controller can accurately identify and control the corresponding slave controller.

[0077] Preferably, the main controller integrates overload protection, ESD protection, and timeout protection functions to ensure the stability and reliability of communication.

Claims

1. A motor control device based on DC low-voltage power line carrier technology, characterized in that, It includes: The main controller includes a first modem, a power module, and a microcontroller unit (MCU), which generates control signals, modulates the control signals into power line carrier signals through the first modem, and sends them to the power line. The slave controller includes a second modem and a motor control interface. The second modem is used to receive power line carrier signals in the power line and demodulate them into control signals. The motor control interface adjusts the motor's start, stop, forward and reverse rotation, and speed regulation functions according to the demodulated control signals. The stabilizer module, connected to the main controller, is used for filtering and providing a stable power supply voltage; The power module provides a stable power supply to the master controller and slave controllers, supporting low-voltage power supply of DC10-60V; Power lines are used to connect the master controller and the slave controller, and to transmit power signals and power line carrier signals.

2. The motor control device based on DC low-voltage power line carrier technology according to claim 1, characterized in that, The main controller integrates a DC low-voltage power line carrier communication module, which adopts half-duplex communication mode, with a baud rate of 9600bps and a data format including 1 start bit, 8 data bits and 1 stop bit.

3. The motor control device based on DC low-voltage power line carrier technology according to claim 1, characterized in that, The stabilizer module eliminates ripple interference through an RLC filter network and supports a voltage range of DC10-60V.

4. The motor control device based on DC low-voltage power line carrier technology according to claim 1, characterized in that, The master controller is connected to multiple slave controllers via a daisy chain topology, supporting a maximum of 256 slave controller nodes.

5. The motor control device based on DC low-voltage power line carrier technology according to claim 1, characterized in that, The motor controller receives signals transmitted from the main controller via the UART communication interface and realizes the functions of starting, stopping, reversing, and speed regulation of the motor.

6. The motor control device based on DC low-voltage power line carrier technology according to claim 1, characterized in that, The slave controller includes an address setting module for assigning a unique address to each slave controller, ensuring that the master controller can accurately identify and control the corresponding slave controller.

7. The motor control device based on DC low-voltage power line carrier technology according to claim 1, characterized in that, The main controller integrates overload protection, ESD protection, and timeout protection to ensure the stability and reliability of communication.

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