A dual-winding stepper motor control device

Abstract

This utility model discloses a control device for a dual-winding stepper motor, relating to the field of stepper motor drive technology. It includes: a first winding control device and a second winding control device for controlling the two winding coils of a dual-winding stepper motor. Both the first and second winding control devices include a data acquisition and output unit and connected to it a main control unit, an operation display unit, a drive unit, and a power supply unit. They also include a maintenance unit connected to the main control unit and the drive unit. The output terminal of the drive unit is connected to the winding coils, and the main control unit, data acquisition and output unit, and drive unit are all connected to the power supply unit. The two drive units are interconnected. This utility model utilizes digital technology and modular design, making the system's control and monitoring more precise and flexible. Furthermore, each module can be independently designed, tested, and maintained.

Description

Technical Field

[0001] This utility model relates to the field of stepper motor drive technology, specifically to a dual-winding stepper motor control device. Background Technology

[0002] Nuclear power technology has garnered significant attention in the field of nuclear energy development due to its outstanding safety performance and substantial economic benefits. As a core safety protection component of a nuclear reactor, the absorber sphere plays an irreplaceable and crucial role in ensuring the safe and stable operation of the reactor. However, current technical solutions for nuclear-grade absorber sphere control devices still face several pressing technical challenges that require immediate resolution.

[0003] Currently, the commonly used nuclear-grade absorber ball control device is based on a combination architecture of relays and non-nuclear-grade drivers, and its control functions are mainly implemented through pure relay hardware wiring. This traditional technical solution has the following significant drawbacks: First, in terms of control performance, the control precision of this solution is insufficient, making it difficult to meet the precise control requirements of modern nuclear reactors; second, in terms of system maintenance, the process of functional changes and system upgrades is extremely cumbersome, causing great inconvenience to daily operation and maintenance; third, in terms of reliability, relay contacts are prone to aging during long-term operation, which not only affects system stability but may also cause failures. The periodic comprehensive replacement measures that must be implemented to ensure reliability significantly increase operation and maintenance costs and workload. These factors together pose a severe challenge to the long-term reliable operation of the system.

[0004] Furthermore, this scheme also suffers from other significant technical limitations: the non-nuclear-grade nature of the drive unit prevents it from meeting the technical requirements for long-distance transmission at the motor end; the peak voltage on the motor side is limited to below 800V, severely restricting the potential for system performance improvement; and in terms of power supply characteristics, the existing control device generates significant harmonic current interference, adversely affecting the upstream power supply network and thus jeopardizing the stable operation of the entire power supply system. These technical deficiencies not only directly threaten the normal operation and safety of the nuclear reactor but may also have a chain reaction of negative impacts on surrounding related equipment and systems.

[0005] Existing patent CN112397207B discloses a testing device and method for functional verification of an absorber ball shutdown system, which can realize the early verification of the actual function of the absorber ball shutdown system. Although this patent provides a functional verification scheme for the absorber ball shutdown system, its testing device does not solve the core technical problem of nuclear-grade drive control and cannot fundamentally overcome the inherent defects of the relay control scheme.

[0006] Existing patent CN108923694B discloses a power system for a dual three-phase hub motor, which can increase the area of ​​the high-efficiency zone of the power system and improve the reliability of the drive. Although this patent improves the reliability of the drive through a dual-winding design, it neither considers the special requirements of the nuclear-grade environment nor solves key technical problems such as long-line transmission and harmonic suppression, thus limiting its applicability to nuclear reactor safety protection systems.

[0007] In summary, none of the existing patents mentioned above have solved the problems of low control accuracy and inconvenient upgrade and maintenance of nuclear-grade absorption sphere control devices in the prior art. Utility Model Content

[0008] Based on the above-mentioned problems in the existing technology, this utility model proposes a dual-winding stepper motor control device, which has a fault self-diagnosis function with high diagnostic coverage and can promptly display alarms when a fault occurs; it has the advantages of safety and stability, high reliability, easy maintenance, and stable operation.

[0009] To achieve the above objectives, this utility model proposes a dual-winding stepper motor control device, the specific technical solution of which is as follows:

[0010] A dual-winding stepper motor control device includes:

[0011] The first winding control device and the second winding control device are used to independently control the first winding coil and the second winding coil of the dual-winding stepper motor, respectively.

[0012] Both the first winding control device and the second winding control device include a data acquisition and output unit and a main control unit, an operation display unit, a drive unit and a power supply unit connected to the data acquisition and output unit;

[0013] The drive unit is connected to the winding coil, and the power supply unit is also connected to the main control unit and the drive unit respectively; the drive unit of the first winding control device and the drive unit of the second winding control device are interconnected; the drive unit includes a drive area, a control area and an interface area, and the drive area is provided with a three-phase three-level capacitor array.

[0014] Furthermore, the drive area also includes a power module, a power transistor heat sink, and an inverter bridge. The power module is connected between the power supply unit and the three-phase three-level capacitor array, the inverter bridge is connected between the three-phase three-level capacitor array and the winding coil, and the power transistor heat sink is attached to the power switching transistor of the inverter bridge.

[0015] Furthermore, the control area includes a main control module and an algorithm module, an over / under voltage monitoring module, a memory, and a reset clock module connected to the main control module. The main control module and the over / under voltage monitoring module are both connected to the power supply module. The main control module and the algorithm module are both connected to the inverter bridge. The power transistor heat sink is connected to the main control module. The main control module collects the current and voltage signals of the inverter bridge in real time. The algorithm module dynamically controls the operation of the inverter bridge through real-time calculation.

[0016] Furthermore, the interface area includes a master / slave switching interface, a general-purpose I / O interface, a maintenance interface, a communication interface, a status indication module, and an operation control module connected to the master control module; the master / slave switching interface supports a dual-machine redundancy architecture, automatically switching to the standby unit when the master drive unit fails.

[0017] Furthermore, the operation control module is equipped with a fault clearing button, a test switch, a power switch, and a mode switch.

[0018] Furthermore, the main control unit includes a main processor module, a power supply module, and a communication module. The main processor module has a built-in logic algorithm, the power supply module is connected to the power supply unit, and the communication module is connected to the data acquisition and output unit.

[0019] Furthermore, the operation display unit includes a power indicator light, an alarm indicator light, a running mode switch, a running mode indicator light, a ball drop button, and a light test button. The running mode switch is equipped with a DCS remote mode, a periodic test mode, and an installation test mode.

[0020] Furthermore, the operation display unit also includes an installation test mode debugging panel, which includes 6 debugging branches. Each debugging branch is equipped with a switch to control the branch, an indicator light for the switch status, and a limit indicator light. Each debugging branch is also equipped with a switch to control the ball drop and an indicator light for displaying the switch status.

[0021] Furthermore, the control device also includes a maintenance unit, and both the main control unit and the drive unit are connected to the maintenance unit.

[0022] Furthermore, the power supply unit adopts a PFC power supply circuit.

[0023] Based on the above technical solution, this utility model has at least the following beneficial effects:

[0024] 1. This utility model proposes a dual-winding stepper motor control device, which uses digital technology to realize logic control, making the control and monitoring of the system more accurate and flexible. It not only improves the maintainability and scalability of the system, but also enables it to quickly adapt to different operating requirements and fault protection strategies, thereby significantly improving the overall performance and adaptability of the system.

[0025] 2. This utility model proposes a dual-winding stepper motor control device, which adopts three-level drive output technology. During 120-meter long-distance transmission, it can effectively suppress the peak drive voltage on the motor side. It can not only make full use of the power supply voltage and improve the voltage utilization rate, but also reduce voltage loss and electromagnetic interference during long-distance transmission, ensuring the stable operation of the motor. It is suitable for the high-precision control requirements of nuclear-grade equipment.

[0026] 3. This utility model proposes a dual-winding stepper motor control device, which is equipped with a high-performance filter unit and a PFC power supply on the power supply side and the drive side respectively, forming a multi-harmonic suppression mechanism. It can effectively eliminate the harmonic current generated during motor operation and control the current distortion rate within the standard range. This not only ensures the power supply quality of the power grid, but also improves the electromagnetic compatibility performance of the entire system. It is particularly suitable for industrial application scenarios with strict power quality requirements.

[0027] 4. This utility model proposes a dual-winding stepper motor control device, which decomposes the complex electrical system into functionally independent and interface-standardized control modules, drive modules, and power supply modules. This modular design concept allows each functional unit to be developed in parallel, tested independently, and quickly replaced, significantly shortening equipment maintenance downtime and reducing operation and maintenance costs. Simultaneously, the fault isolation design between modules effectively prevents the propagation of local faults, significantly improving the overall reliability and maintainability of the system. Attached Figure Description

[0028] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a dual-winding stepper motor control device proposed in this utility model;

[0030] Figure 2 This is a functional hierarchy diagram of a dual-winding stepper motor control device proposed in this utility model;

[0031] Figure 3 This is a partial structural schematic diagram of a dual-winding stepper motor control device proposed in this utility model.

[0032] Figure 4This is a partial structural schematic diagram of a dual-winding stepper motor control device proposed in this utility model. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0034] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Example 1

[0036] Existing nuclear-grade absorber sphere control devices suffer from numerous problems in terms of control accuracy, reliability, maintainability, parameter adjustability, and compatibility with nuclear-grade requirements. Therefore, there is an urgent need for a novel nuclear-grade absorber sphere control device to overcome the shortcomings of existing technologies, improve the overall performance and reliability of the system, and ensure the safe and stable operation of nuclear reactors.

[0037] To address the aforementioned technical problems, this utility model proposes a dual-winding stepper motor control device to achieve remote and local control of the absorption ball device. (See reference...) Figure 1 As shown, the control device includes a first winding control device and a second winding control device. The dual-winding stepper motor includes a first winding coil and a second winding coil. The first winding control device controls the first winding coil, and the second winding control device controls the second winding coil. Both the first and second winding control devices include a main control unit, a data acquisition and output unit, a drive unit, an operation display unit, and a power supply unit. The output terminal of the drive unit is connected to the winding coil, and the output terminal of the data acquisition and output unit is connected to the input terminal of the drive unit. The data acquisition and output unit is interconnected with the main control unit and the operation display unit. The main control unit, the data acquisition and output unit, and the drive unit are all connected to the power supply unit. The drive units of the first and second winding control devices are interconnected. The control device also includes a maintenance unit, which is connected to both the main control unit and the drive unit.

[0038] See Figure 2As shown, the functional hierarchy of this control device includes an operation display layer, a data processing layer, a communication layer, a signal input / output layer, a drive layer, and a maintenance layer. The operation display unit is the operation display layer, the main control unit is the data processing layer, the data acquisition and output unit is the communication layer and signal input / output layer, the drive unit is the drive layer, and the maintenance unit is the maintenance layer. These functional layers work together to form a complete control system. The operation display layer enables local operation command input and real-time display of operating status and alarm information. The data processing layer receives and processes remote or local operation commands, performs logic control calculations, and feeds the results back to the next lower-level unit. The communication layer and signal input / output layer are responsible for acquiring field sensor signals and local commands, while also receiving and transmitting control commands from the operation display unit. The drive layer implements precise drive control of the dual-winding stepper motor according to the commands of the main control unit, ensuring accurate positioning of the absorption ball device. The maintenance layer monitors the operating status of the main control unit and drive unit in real time, providing support for system optimization and maintenance. The power supply unit provides a stable DC operating voltage to each functional layer.

[0039] Specifically, the internal layout of this control device fully considers heat dissipation performance and electrical isolation requirements. For heat dissipation, the control unit, data acquisition and output unit, and drive unit all adopt a vertical board arrangement, forming natural airflow channels between the boards. The upper and lower surfaces of the unit housing feature a honeycomb-shaped perforated design to further enhance heat dissipation. To address the high heat generation of the drive unit, a dedicated heat sink is configured, coupled with a bottom-mounted cooling fan for forced air cooling. For electrical isolation, a combination of cable spatial layout isolation and electrical isolation is used, along with pre- and post-DV / DT filter circuits, to effectively suppress the impact of internal interference on external equipment. The main control unit and data acquisition and output unit use independent power supply systems, achieving electrical isolation from the drive unit's PFC power circuit; simultaneously, considering that the cooling fan is an inductive load, its power supply system also employs a dedicated AC / DC isolation design. These measures collectively ensure the stability and reliability of the device's operation.

[0040] For details, please refer to Figure 3As shown, the main control unit adopts a non-redundant control structure. It includes a main processor module, a power supply module, and a communication module. The main processor module has built-in logic algorithms for function control. The power supply module connects to the power supply unit, and the communication module connects to the data acquisition and output unit for data exchange. This main control unit has comprehensive self-diagnostic functions. The self-diagnostic scope of its processor section includes, but is not limited to: monitoring the operating status of the CPU core, verifying RAM read / write operations, verifying the integrity of the ROM storage area, detecting the synchronization and accuracy of the system clock, monitoring the reset of the hardware watchdog timer, and checking the sequentiality of program execution. These self-diagnostic functions are implemented through a combination of periodic self-testing and real-time monitoring. Any abnormality will trigger a corresponding fault code and upload it to the operation display unit for alarm notification.

[0041] Specifically, the data acquisition and output unit has comprehensive channel self-diagnostic functions, covering the integrity detection of both input and output channels. For input channels, a self-test method using channel comparison or dynamic input effective range signals is employed. This involves real-time monitoring of whether the input signal is within the preset effective operating range, combined with multi-channel data comparison to verify the reliability of the acquired data. For output channels, a readback verification diagnostic method is used. Immediately after the output control signal, the actual output status is read and compared in a closed loop with the expected output value to ensure that the output command is executed accurately.

[0042] For details, please refer to Figure 3 As shown, the driving unit is a core-level driving unit, which includes a driving area, a control area, and an interface area.

[0043] The drive area contains a power supply module, a three-level capacitor array, and an inverter bridge connected in sequence, as well as power transistor heatsinks. The power supply module connects to the power supply unit, converting the input power voltage to a voltage suitable for each module. The three-level capacitor array provides the midpoint potential to the inverter bridge and balances the voltage, ensuring stable operation of the inverter bridge, which is used to control and drive the stepper motor's operation. The power transistor heatsink is tightly fitted to the power switching transistors of the inverter bridge using high thermal conductivity silicone grease, with the heatsink fins aligned with the forced airflow direction to ensure that the power transistor junction temperature does not exceed 110°C under rated load.

[0044] The control area includes a main control module and connected to it an algorithm module, an over / under voltage monitoring module, an EEPROM memory, and a reset clock module. The main control module and the over / under voltage monitoring module are connected to the power supply module to monitor the power supply status in real time. Both the main control module and the algorithm module are connected to the inverter bridge. The main control module is responsible for acquiring the current and voltage signals of the inverter bridge, while the algorithm module dynamically controls the inverter bridge operation by generating PWM drive signals through real-time calculations. The over / under voltage monitoring module monitors the power supply voltage to ensure it remains within a safe range. The memory stores the stepper motor's configuration and calibration data. The reset clock module provides reset and clock signals. The power transistor heatsink is connected to the main control module, feeding back the temperature monitoring signal to the control system. The drive unit monitors the DC bus voltage, the power supply status of the drive chip, and overcurrent or short-circuit faults of the power switching transistors in real time through the main control module. It is also responsible for monitoring the operating status of the algorithm module, implementing a dual fault diagnosis and protection mechanism.

[0045] The interface area serves as the interaction hub between the drive unit and the external environment. It includes a master / slave switching interface (connected to the main control module), a general-purpose I / O interface, a maintenance interface, a communication interface, a status display module, and an operation control module. The master / slave switching interface connects two drive units, supporting a dual-machine redundancy architecture; it automatically switches to the backup unit when the main drive unit fails. The general-purpose I / O interface connects to other external devices. The maintenance interface connects to the maintenance unit and has a built-in debug log export function, allowing the reading of historical fault codes and power transistor temperature rise curves. The communication interface connects to the data acquisition and output unit. The status display module shows the drive unit's operating status using a combination of multi-color LED indicators and an LCD screen, providing real-time feedback on operating status, power transistor temperature, and voltage fluctuations. The operation control module is for operator control and includes a reset button, a fault clear button, a test switch, a power switch, and a mode switch.

[0046] Optionally, the primary / standby switching interface uses a synchronous link to achieve millisecond-level seamless switching between primary and standby units, supporting manual / automatic modes.

[0047] Optionally, the general-purpose I / O interface provides 32 isolated DI channels, 16 isolated DO channels, 8 AI channels and 8 AO channels, with the isolation function being a dedicated configuration for the DI / DO channels.

[0048] Optionally, the maintenance interface provides dual JTAG interfaces and an independent debugging channel.

[0049] Optionally, the communication interface adopts a dual-channel redundant design with a built-in data verification and retransmission mechanism.

[0050] Optionally, the status display module is an LED digital tube.

[0051] Optionally, the operation control module is equipped with an emergency stop button, and the test switch has a self-locking protection function to prevent accidental triggering.

[0052] The aforementioned drive unit employs a TNPC-type three-phase three-level inverter topology. By introducing a midpoint potential into the circuit, the output circuit can generate three different voltage levels. When the switching transistors are in different operating states, the circuit voltage will change accordingly, thereby achieving precise control of the output voltage. This three-level topology significantly reduces output harmonic content, making the voltage waveform closer to a sine wave. This not only improves power quality but also utilizes the power supply voltage more efficiently, outputting a higher voltage level under the same operating conditions. Based on the TNPC three-phase three-level inverter topology design, the drive unit achieves precise motor control. Furthermore, a redundant architecture design with mutual backup is adopted. The two drive units achieve hot standby redundancy and millisecond-level switching through high-speed communication, significantly improving system stability and control accuracy, fully meeting the stringent requirements of 120-meter long-distance transmission and operating voltage below 800V in the field.

[0053] Specifically, the operation display unit is used to monitor the status of the drive unit, switch modes, alarm faults, and perform debugging operations, ensuring that operators can intuitively and conveniently control the operation of the entire device.

[0054] See Figure 4 As shown, the operation display unit includes power indicator lights and alarm indicator lights. The power indicator lights display the real-time power supply status of the control device, illuminating immediately when the power switch is closed, providing operators with basic equipment operating status indication. The alarm indicator lights include fault alarm indicator lights and temperature alarm indicator lights, forming a dual alarm system. The fault alarm indicator lights up rapidly when abnormal conditions such as winding short circuits, open circuits, or motor jamming occur. The temperature alarm indicator lights up when the motor operating temperature exceeds a preset safety threshold. Together, they constitute a complete equipment protection status indication mechanism.

[0055] The operation display unit includes a ball-dropping button, which is designed to be self-resetting. When pressed, it provides clear tactile feedback and a crisp click sound, ensuring that the operator is aware that the ball-dropping action has been triggered. When this button is pressed, the control device receives a signal and controls the relevant solenoid valves or actuators of the six branches to operate simultaneously, so as to realize the function of dropping the ball together in all six branches.

[0056] The operation display unit includes an operating mode selection switch and corresponding mode indicator lights. The operating mode selection switch adopts a rotary design and has three positions: DCS remote mode, periodic test mode, and installation test mode. Each position corresponds to an indicator light of a matching color. When the switch is rotated to the corresponding mode position, the corresponding indicator light lights up, clearly showing the current operating mode. This ensures that operators can intuitively and accurately understand the operating status of the device and achieve precise control and operation in different modes.

[0057] The operation display unit also includes a test mode debugging panel, which includes six debugging branches. Each branch is equipped with a switch to control the branch and three indicator lights. The indicator lights include an indicator light showing the switch status of the branch and limit indicator lights, including an upper limit indicator light and a lower limit indicator light. Each debugging branch also has a corresponding switch to control the ball drop and an indicator light to show the switch status.

[0058] The operation display unit is also equipped with a light test button to test all indicator lights in order to promptly identify faulty indicator lights.

[0059] The working process of the dual-winding stepper motor control device proposed in this utility model is as follows: The operator inputs commands through the operation display unit. The data acquisition and output unit collects field and local signals, which are converted by the data acquisition and output unit and transmitted to the main control unit for logical calculation via communication. The calculation results are then transmitted back to the data acquisition and output unit, which transmits the calculation results to the operation display unit for display and simultaneously transmits action commands to the drive unit. The drive unit outputs voltage, current, and frequency to drive and control the motor, causing it to run. The first winding control device controls the first winding coil of the dual-winding motor, and the second winding control device controls the second winding coil of the dual-winding motor. Under normal conditions, the first winding control device is in a half-current output state, keeping the motor in a energized holding state. The first and second winding control devices transmit signals via communication. The second winding control device is in a redundant hot standby state; when the first winding control device fails, redundancy switching occurs, switching to the second winding control device to ensure reliable output. When an external command is received, the first winding control device collects and calculates the command, and the drive unit drives the motor to run with full current output.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0062] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A control device for a dual-winding stepper motor, characterized in that, include: The first winding control device and the second winding control device are used to independently control the first winding coil and the second winding coil of the dual-winding stepper motor, respectively. Both the first winding control device and the second winding control device include a data acquisition and output unit and a main control unit, an operation display unit, a drive unit and a power supply unit connected to the data acquisition and output unit; The drive unit is connected to the winding coil, and the power supply unit is also connected to the main control unit and the drive unit respectively; the drive unit of the first winding control device and the drive unit of the second winding control device are interconnected; the drive unit includes a drive area, a control area and an interface area, and the drive area is provided with a three-phase three-level capacitor array.

2. The dual-winding stepper motor control device according to claim 1, characterized in that: The drive area also includes a power module, a power transistor heat sink, and an inverter bridge. The power module is connected between the power supply unit and the three-phase three-level capacitor array. The inverter bridge is connected between the three-phase three-level capacitor array and the winding coil. The power transistor heat sink is in contact with the power switching transistor of the inverter bridge.

3. The dual-winding stepper motor control device according to claim 2, characterized in that: The control area includes a main control module and an algorithm module, an over / under voltage monitoring module, a memory, and a reset clock module connected to the main control module. The main control module and the over / under voltage monitoring module are both connected to the power supply module. The main control module and the algorithm module are both connected to the inverter bridge. The power transistor heat sink is connected to the main control module. The main control module collects the current and voltage signals of the inverter bridge in real time. The algorithm module dynamically controls the operation of the inverter bridge through real-time calculation.

4. The dual-winding stepper motor control device according to claim 3, characterized in that: The interface area includes a primary / backup switching interface, a general-purpose I / O interface, a maintenance interface, a communication interface, a status indication module, and an operation control module connected to the main control module; the primary / backup switching interface supports a dual-machine redundancy architecture, automatically switching to the backup unit when the primary drive unit fails.

5. The dual-winding stepper motor control device according to claim 4, characterized in that: The operation control module is equipped with a fault clearing button, a test switch, a power switch, and a mode switch.

6. The dual-winding stepper motor control device according to claim 1, characterized in that: The main control unit includes a main processor module, a power supply module, and a communication module. The main processor module has built-in logic algorithms. The power supply module is connected to the power supply unit, and the communication module is connected to the data acquisition and output unit.

7. The dual-winding stepper motor control device according to claim 2, characterized in that: The operation display unit includes a power indicator light, an alarm indicator light, a running mode switch, a running mode indicator light, a ball drop button, and a light test button. The running mode switch has DCS remote mode, periodic test mode, and installation test mode.

8. The dual-winding stepper motor control device according to claim 7, characterized in that: The operation display unit also includes an installation test mode debugging panel, which includes 6 debugging branches. Each debugging branch is equipped with a switch to control the branch, an indicator light for the switch status, and a limit indicator light. Each debugging branch is also equipped with a switch to control the ball drop and an indicator light for displaying the switch status.

9. The dual-winding stepper motor control device according to claim 1, characterized in that: The control device further includes a maintenance unit, and both the main control unit and the drive unit are connected to the maintenance unit.

10. The dual-winding stepper motor control device according to claim 1, characterized in that: The power supply unit uses a PFC power supply circuit.

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