Special transformer device for textile power supply

Abstract

The application discloses a special voltage transformation device for a textile power supply, and relates to the technical field of power supply voltage transformation control. The special voltage transformation device for the textile power supply can effectively cope with the influence of complex industrial site environments on power supply stability. Through real-time environment monitoring and dynamic compensation control, the temperature and humidity sensors arranged around the transformer and the controllable rectification module collect environment data, the compensation module automatically adjusts the thyristor trigger phase, offsets the device drift and insulation influence caused by temperature and humidity changes, ensures the high stability of the second adjustable direct current voltage, provides one fixed direct current voltage and at least two adjustable direct current voltages, meets the diversified requirements of textile equipment, significantly improves the power supply adaptability and long-term stability in harsh environments such as high temperature and high humidity, and reduces the production interruption risk and system maintenance requirements.

Description

Technical Field

[0001] This application relates to the field of power transformer control technology, and in particular to a special transformer device for textile power supply. Background Technology

[0002] In the entire textile process, spinning is the primary and most crucial production stage. Spinning and weaving are two independent processes. When a voltage dip occurs, if the weaving process is affected, it generally only results in the loss of woven products on the production line, while the yarn products in the textile process remain largely unaffected. However, if the spinning process is affected, it will impact the yarn products and subsequently the woven products. Therefore, research on sensitive equipment in the textile industry is particularly important.

[0003] The textile industry's production processes place extremely high demands on the stability of power and control supply. Various subsystems in the production process, especially equipment involving automatic control, extensively utilize nonlinear devices such as frequency converters and AC contactors. These devices are highly sensitive to fluctuations in grid voltage and frequency, have extremely stringent requirements for power supply continuity, and demand high-quality power from the power supply system. Voltage fluctuations, particularly voltage dips, can cause production equipment to shut down, forcing a halt to the manufacturing process and resulting in significant product scrap and equipment damage.

[0004] In the textile industry, power transformers are crucial components for ensuring the stable operation of production equipment, especially dedicated power systems that provide various DC and AC voltages for textile machinery. Current technologies typically employ basic transformer and rectifier circuit structures, such as using voltage conversion transformers and thyristor-controlled rectifier modules to generate adjustable DC voltages to meet the power requirements of different textile processes. However, these existing devices have significant limitations in practical operation, primarily due to the direct impact of environmental factors on their performance.

[0005] Textile production environments often exhibit significant temperature and humidity fluctuations. For instance, workshop temperatures may rise due to equipment heating or seasonal changes, while humidity may increase due to process requirements or climatic conditions. Existing transformer devices lack effective environmental parameter monitoring and compensation mechanisms, resulting in poor output voltage stability. Specifically, temperature changes affect the triggering characteristics of thyristors: when ambient temperature rises, the gate trigger voltage of the thyristor may decrease, causing the trigger phase to advance, leading to uncontrollable fluctuations in the rectified output voltage. Simultaneously, the iron and copper losses of the transformer itself also change with temperature, further exacerbating output voltage deviations. On the other hand, increased humidity leads to decreased circuit insulation performance, increasing the risk of leakage current and potentially causing delays in the thyristor triggering circuit, as humidity affects the surface conductivity and heat dissipation of semiconductor components, thus distorting the trigger signal. Summary of the Invention

[0006] This application provides a special transformer device for textile power supply, which includes: The incoming line protection unit has its input terminal connected to a three-phase AC power supply. The main contactor, whose main contacts are connected in series to the output terminal of the incoming line protection unit; A fixed DC voltage output branch, the input terminal of which is connected to the main circuit after the incoming line protection unit, the fixed DC voltage output branch includes a first rectifier unit for outputting a fixed first DC voltage; A voltage conversion transformer, the primary winding of which is connected to the output terminal of the main contactor's main contacts; A controllable rectifier module, the AC input terminal of which is connected to the secondary winding of the voltage conversion transformer, is composed of multiple thyristors connected together; An environmental parameter monitoring module includes a temperature and humidity composite sensor array disposed around the voltage conversion transformer and / or the controllable rectifier module, for real-time acquisition of ambient temperature and ambient humidity values; The compensation control module has its signal input terminal connected to the environmental parameter monitoring module and its control signal output terminal connected to the thyristor trigger circuit of the controllable rectifier module. The compensation control module is configured to: dynamically calculate the compensation parameter Δθ for correcting the trigger phase of the thyristor based on the ambient temperature value and the ambient humidity value through an environmental stress compensation model; send the compensation parameter Δθ to the trigger circuit of the thyristor to dynamically correct the reference trigger phase θ1 of the thyristor, so as to stabilize the second adjustable DC voltage output by the controllable rectifier module. The DC output side of the controllable rectifier module is configured to provide at least two second adjustable DC voltages that are different from the first DC voltage.

[0007] Furthermore, the fixed DC voltage output branch also includes a switching switch, which is connected in series in the fixed DC voltage output branch and used to control the on / off state of the fixed DC voltage output branch.

[0008] Furthermore, the temperature and humidity composite sensor array includes at least one temperature sensor and at least one humidity sensor. The temperature sensor is attached to the housing surface of the voltage conversion transformer, and the humidity sensor is located near the heat sink of the controllable rectifier module.

[0009] Furthermore, the environmental stress compensation model is specifically configured to calculate the compensation parameter Δθ using the following compensation function: Δθ = K1 × (T - T1) + K2 × (H - H1), where T is the real-time ambient temperature value, T1 is the preset reference temperature value; H is the real-time ambient humidity value, H1 is the preset reference humidity value; K1 is the temperature compensation coefficient, and K2 is the humidity compensation coefficient. The temperature compensation coefficient K1 and humidity compensation coefficient K2 satisfy the condition that |K1|>|K2|, wherein the temperature compensation coefficient K1 ranges from -0.5° to -0.1° per degree Celsius, and the humidity compensation coefficient K2 ranges from 0.01° to 0.05° per percentage of relative humidity.

[0010] Furthermore, the temperature compensation coefficient K1 is used to compensate for the premature triggering of the thyristor and the change in the output voltage of the transformer caused by the increase in temperature; the humidity compensation coefficient K2 is used to compensate for the decrease in circuit insulation performance and the trigger delay effect caused by the increase in humidity.

[0011] Furthermore, the compensation control module is integrated into the thyristor trigger circuit, and the compensation control module is a microcontroller or a dedicated integrated circuit.

[0012] Furthermore, the controllable rectifier module is a three-phase fully controlled rectifier bridge or a three-phase semi-controlled rectifier bridge.

[0013] Furthermore, the voltage conversion transformer is also equipped with an independent AC voltage winding for directly outputting an AC voltage.

[0014] Furthermore, the circuit also includes a control relay, the coil of which is powered by the first DC voltage output from the fixed DC voltage output branch, and the incoming line protection unit includes a circuit breaker and a fuse.

[0015] The embodiments of this application have the following beneficial effects: This special transformer device for textile power supplies can effectively cope with the impact of complex industrial environments on power stability. Through real-time environmental monitoring and dynamic compensation control, it ensures the accuracy and reliability of the output voltage. Temperature and humidity sensors arranged around the voltage conversion transformer and the controllable rectifier module continuously collect ambient temperature and humidity data. Based on this real-time data, the compensation control module automatically adjusts the trigger phase of the thyristors to counteract the characteristic drift of semiconductor devices caused by changes in ambient temperature, and the impact of decreased insulation performance caused by changes in humidity on the trigger timing. This ensures that the second adjustable DC voltage output by the controllable rectifier module remains highly stable and unaffected by external environmental fluctuations.

[0016] This device offers multiple voltage outputs, including a fixed first DC voltage and at least two adjustable DC voltages generated by controllable rectifier modules, meeting the diverse power supply requirements of textile equipment. The fixed DC voltage branch has an independent switching switch for flexible on / off control. The voltage conversion transformer also features an independent AC voltage winding, directly providing AC power and enhancing the device's versatility. Through an environmentally adaptive intelligent compensation strategy, multi-voltage output capability, and comprehensive protection design, this device significantly improves power adaptability and long-term operational stability in harsh industrial environments such as high temperature and high humidity, reducing the risk of production interruptions due to voltage fluctuations and minimizing system maintenance requirements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 An exemplary illustration shows a schematic diagram of a special transformer system for textile power supply provided in an embodiment of this application; Figure 2 An exemplary schematic diagram of a special transformer device for textile power supply provided in an embodiment of this application is shown. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0020] To further illustrate the technical solutions provided in the embodiments of this application, a detailed description is provided below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of this application provide the special transformer operation steps as shown in the following embodiments or drawings, more or fewer operation steps may be included in the special transformer based on conventional or non-inventive methods. For steps that do not logically have a necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiments of this application.

[0021] refer to Figures 1-2 As shown, this application provides a special transformer device for textile power supply, which includes: an input protection unit, the input terminal of which is connected to a three-phase AC power supply, and the circuit also includes a control relay 41. The coil of the control relay 41 is powered by a first DC voltage output from a fixed DC voltage output branch 40. The input protection unit includes a circuit breaker 11 and a fuse 12.

[0022] The main contactor 10 has its main contacts connected in series to the output terminal of the incoming line protection unit.

[0023] The fixed DC voltage output branch 40 has its input terminal connected to the main circuit after the incoming line protection unit. The fixed DC voltage output branch 40 includes a first rectifier unit for outputting a fixed first DC voltage. The fixed DC voltage output branch 40 also includes a switching switch connected in series in the fixed DC voltage output branch 40 and used to control the on / off state of the fixed DC voltage output branch 40.

[0024] The incoming line protection unit is connected to the input terminal of the three-phase AC power supply. It integrates a circuit breaker 11 and a fuse 12 to provide overcurrent and short-circuit protection for the input power supply and prevent electrical faults from damaging subsequent circuits.

[0025] Circuit breaker 11 provides overload protection, while fuse 12 enables rapid disconnection in the event of a short circuit, thereby improving the safety and reliability of the entire device.

[0026] The circuit also includes a control relay 41, whose coil is powered by the first DC voltage output from the fixed DC voltage output branch 40. This allows the control relay 41 to operate independently of the main power supply, ensuring the stable operation of the control logic. The incoming line protection unit serves as the first level of protection at the power input, providing a clean and controlled power supply for subsequent circuits.

[0027] The main contacts of the main contactor 10 are connected in series to the output terminal of the incoming line protection unit to control the on / off state of the main circuit. By operating the main contactor 10, the power supply to and isolation of the primary winding of the voltage conversion transformer 20 can be realized, which facilitates the start-up, shutdown operation and maintenance management of the device.

[0028] The input terminal of the fixed DC voltage output branch 40 is connected to the main circuit after the incoming line protection unit. This branch includes a first rectifier unit and a switching switch. The first rectifier unit converts AC power into a fixed first DC voltage, providing a stable and reliable power supply for control circuits such as the control relay 41.

[0029] A changeover switch is connected in series in the branch circuit to manually or automatically control the on / off state of the fixed DC voltage output branch 40, thereby independently managing the power supply status. This branch circuit design makes the control circuit independent of the main output circuit, improving the system's modularity and reliability.

[0030] The voltage conversion transformer 20 has its primary winding connected to the output terminal of the main contactor 10. The voltage conversion transformer 20 also has an independent AC voltage winding for directly outputting an AC voltage.

[0031] The controllable rectifier module 30 has its AC input terminal connected to the secondary winding of the voltage conversion transformer 20. The controllable rectifier module 30 is composed of multiple thyristors connected together. The controllable rectifier module 30 is a three-phase fully controlled rectifier bridge or a three-phase semi-controlled rectifier bridge.

[0032] The primary winding of the voltage conversion transformer 20 is connected to the output terminal of the main contacts of the main contactor 10, and is used to receive AC power controlled by the incoming line protection unit and the main contactor 10 to realize the transmission of electrical energy and voltage conversion. The transformer converts the input voltage to the required voltage level through the principle of electromagnetic induction, and the secondary winding provides a suitable AC input for the controllable rectifier module 30, thereby supporting the subsequent rectification process.

[0033] The voltage conversion transformer 20 is also equipped with an independent AC voltage winding, which can directly output an AC voltage. This provides the device with an additional AC power output option to meet the load requirements of different voltage types that may be needed in textile equipment, and enhances the flexibility and versatility of the system.

[0034] The AC input terminal of the controllable rectifier module 30 is connected to the secondary winding of the voltage conversion transformer 20. It utilizes multiple thyristors to form a three-phase fully controlled rectifier bridge or a three-phase semi-controlled rectifier bridge structure to achieve precise rectification control of the AC power. By adjusting the trigger phase of the thyristors, this module can dynamically adjust the output second adjustable DC voltage to adapt to changing power load requirements in textile applications.

[0035] The controllable characteristics of the controllable rectifier module 30 enable it to respond to commands from the compensation control module 60 and correct the trigger phase in real time according to environmental parameters, thereby offsetting the impact of temperature and humidity fluctuations on the output voltage. The controllable rectifier module 30 efficiently converts AC power into stable DC power, and combined with an environmental stress compensation mechanism, improves the reliability and output accuracy of the device in harsh industrial environments, ensuring the continuous and stable operation of the textile power supply.

[0036] The environmental parameter monitoring module 50 includes a temperature and humidity composite sensor array disposed around the voltage conversion transformer 20 and / or the controllable rectifier module 30, for real-time acquisition of ambient temperature and ambient humidity values. The temperature and humidity composite sensor array includes at least one temperature sensor and at least one humidity sensor. The temperature sensor is attached to the housing surface of the voltage conversion transformer 20, and the humidity sensor is disposed near the heat sink of the controllable rectifier module 30.

[0037] The environmental parameter monitoring module 50 is integrated into the special transformer device. Its purpose is to monitor the environmental conditions around the voltage conversion transformer 20 and the controllable rectifier module 30 in real time, especially the ambient temperature and humidity, in order to capture key parameters that may affect the performance of electronic components.

[0038] The module includes a temperature and humidity composite sensor array, wherein at least one temperature sensor is attached to the surface of the housing of the voltage conversion transformer 20 to directly measure the external surface temperature of the transformer, thereby indirectly reflecting the thermal state and heat dissipation of its internal windings; at least one humidity sensor is located near the heat sink of the controllable rectifier module 30, because the heat sink area is prone to moisture accumulation, and humidity changes may accelerate the aging of circuit insulation or cause triggering delays. The environmental parameter monitoring module 50 transmits the collected data to the compensation control module 60 via a communication connection, enabling the compensation control module 60 to dynamically calculate compensation parameters based on the environmental stress compensation model. These compensation parameters are used to correct the trigger phase of the thyristor, thereby offsetting the effects of increased ambient temperature causing premature triggering or increased humidity leading to decreased insulation performance.

[0039] The compensation control module 60 has its signal input terminal connected to the environmental parameter monitoring module 50, and its control signal output terminal connected to the thyristor trigger circuit of the controllable rectifier module 30. The compensation control module 60 is integrated into the thyristor trigger circuit and is a microcontroller or application-specific integrated circuit.

[0040] The compensation control module 60 is configured to dynamically calculate the compensation parameter Δθ for correcting the trigger phase of the thyristor based on the ambient temperature and humidity values ​​using an environmental stress compensation model. The compensation parameter Δθ is then sent to the thyristor's trigger circuit to dynamically correct the thyristor's reference trigger phase θ1, thereby stabilizing the second adjustable DC voltage output by the controllable rectifier module 30.

[0041] In the aforementioned special transformer device, the trigger phase of the thyristor is compensated because environmental stress (mainly temperature and humidity) significantly affects the electrical characteristics of the thyristor and related circuits, causing the second adjustable DC voltage output by the controllable rectifier module 30 to drift. Specifically, an increase in ambient temperature leads to a change in the carrier mobility of the semiconductor material inside the thyristor, which may cause the trigger phase to advance. At the same time, the winding resistance of the voltage conversion transformer 20 increases with temperature, causing a slight decrease in its output voltage.

[0042] On the other hand, increased ambient humidity will exacerbate the insulation degradation of the peripheral circuits of the controllable rectifier module 30, increase parasitic capacitance and leakage current, and may lead to trigger signal delay and energy loss. Without compensation, these phase deviations caused by environmental changes will directly result in unstable output voltage, failing to meet the stringent requirements of textile power supplies for voltage accuracy and stability.

[0043] The signal input terminal of the compensation control module 60 is communicatively connected to the environmental parameter monitoring module 50 to receive real-time ambient temperature and humidity values. Its control signal output terminal is directly connected to the thyristor trigger circuit of the controllable rectifier module 30. This module is integrated within the trigger circuit and can be hardware-integrated using a microcontroller or dedicated integrated circuit.

[0044] The purpose of the compensation control module 60 is to dynamically adjust the trigger phase of the thyristor according to changes in environmental parameters, so as to offset the impact of temperature and humidity fluctuations on the performance of electronic components in real time, thereby maintaining the stability of the output voltage.

[0045] The compensation control module 60 is configured to dynamically calculate the compensation parameter Δθ based on the received ambient temperature and humidity values ​​using a predefined environmental stress compensation model. This model utilizes the compensation function Δθ = K1 × (T - T1) + K2 × (H - H1), where T and H represent the real-time ambient temperature and humidity values, respectively, T1 and H1 are preset reference values, and K1 and K2 are the temperature compensation coefficient and humidity compensation coefficient, respectively.

[0046] The calculated compensation parameter Δθ is sent to the thyristor trigger circuit in real time to dynamically correct the reference trigger phase θ1. This is to specifically compensate for the thyristor triggering advance caused by temperature rise, as well as the circuit insulation performance degradation and trigger delay effect caused by increased humidity, thereby ensuring that the second adjustable DC voltage output by the controllable rectifier module 30 remains stable under different environmental conditions.

[0047] By working in conjunction with the environmental parameter monitoring module 50 and the controllable rectifier module 30, active compensation for environmental stress is achieved. This module not only improves the output voltage accuracy of the device in textile power supply applications, but also enhances the system's adaptability to harsh industrial environments, reducing the risk of voltage drift or equipment failure caused by temperature and humidity changes.

[0048] The introduction of the compensation control module 60 optimizes the reliability and durability of the entire transformer, provides a continuous and stable power supply for textile equipment, and extends the service life of key components through an intelligent compensation mechanism.

[0049] The environmental stress compensation model is specifically configured to calculate the compensation parameter Δθ using the following compensation function: Δθ = K1 × (T - T1) + K2 × (H - H1), where T is the real-time ambient temperature value, T1 is the preset reference temperature value, H is the real-time ambient humidity value, H1 is the preset reference humidity value, K1 is the temperature compensation coefficient, and K2 is the humidity compensation coefficient.

[0050] The temperature compensation coefficient K1 and the humidity compensation coefficient K2 satisfy the condition: |K1|>|K2|, where the temperature compensation coefficient K1 ranges from -0.5° to -0.1° per degree Celsius, and the humidity compensation coefficient K2 ranges from 0.01° to 0.05° per percentage of relative humidity.

[0051] The environmental stress compensation model dynamically calculates the compensation parameter Δθ using the compensation function Δθ=K1×(T-T1)+K2×(H-H1), where T represents the real-time ambient temperature value, T1 is a preset reference temperature value, H represents the real-time ambient humidity value, and H1 is a preset reference humidity value. The purpose of this model is to quantify the impact of changes in ambient temperature and humidity on the thyristor trigger phase, thereby achieving accurate correction of the reference trigger phase θ1. By introducing reference values ​​T1 and H1, the model can establish a deviation benchmark related to environmental stress, ensuring that the compensation parameter Δθ accurately reflects the difference between actual operating conditions and ideal conditions, providing a reliable basis for subsequent phase adjustments.

[0052] Temperature compensation coefficient K1 and humidity compensation coefficient K2 are used to adjust the weights of temperature and humidity factors in the compensation function, respectively. The value of K1 ranges from -0.5° to -0.1° per degree Celsius, and the value of K2 ranges from 0.01° to 0.05° per percentage of relative humidity.

[0053] Coefficient K1 provides reverse compensation for the premature thyristor triggering and transformer output voltage changes caused by temperature rise, while coefficient K2 is used to offset the decrease in circuit insulation performance and trigger delay effect caused by increased humidity. The compensation coefficients satisfy the relationship |K1|>|K2|, reflecting that the impact of temperature change on thyristor performance is significantly greater than that of humidity change, ensuring the priority and effectiveness of the compensation strategy, and making the model more closely reflect the stress distribution characteristics in actual industrial environments.

[0054] The environmental stress compensation model dynamically optimizes the trigger phase by calculating Δθ in real time and sending it to the thyristor trigger circuit. This model significantly improves the stability of the second adjustable DC voltage output by the controllable rectifier module 30, especially in the fluctuating environment of textile power supply applications, effectively suppressing voltage deviations caused by temperature and humidity drift. Meanwhile, the reasonable range of coefficient values ​​is determined based on extensive experimental data, ensuring the smoothness of compensation and system reliability, thereby extending the device's service life and enhancing its adaptability to complex operating conditions.

[0055] Dynamic compensation of the trigger phase based on the environmental stress compensation model brings key technical benefits. First, by collecting temperature and humidity data in real time and substituting them into the compensation function Δθ=K1×(T-T1)+K2×(H-H1) to calculate the compensation amount, the system can actively offset the phase shift caused by environmental fluctuations, ensuring that the actual triggering time of the thyristor is always maintained near the desired reference. This ensures the high stability of the second adjustable DC voltage output by the controllable rectifier module 30, unaffected by changes in the external environment.

[0056] Secondly, this compensation mechanism enhances the precise control capability of multi-channel adjustable output voltage, enabling the device to simultaneously provide constant and reliable power to loads with different voltage requirements in textile equipment. This effectively extends the service life of key components such as thyristors and transformers by maintaining the system's optimal operating point. Furthermore, the temperature compensation coefficient K1 is used to compensate for the premature triggering of the thyristors and the change in transformer output voltage caused by the increase in temperature. The humidity compensation coefficient K2 is used to compensate for the decrease in circuit insulation performance and the trigger delay effect caused by the increase in humidity.

[0057] The temperature compensation coefficient K1 has a value characteristic, and its purpose is to compensate for the impact of increased ambient temperature on the thyristor trigger phase and transformer output voltage. When the ambient temperature rises, the semiconductor material characteristics of the thyristor may change, causing the trigger phase to advance. At the same time, the increased winding resistance of the voltage conversion transformer 20 will cause slight fluctuations in the output voltage. The value of K1 is introduced into the environmental stress compensation model through the compensation function Δθ=K1×(T-T1)+K2×(H-H1) to correct for the advance triggering effect caused by the temperature rise, thereby ensuring that the reference trigger phase θ1 can be dynamically adjusted to maintain the stability of the second adjustable DC voltage output by the controllable rectifier module 30.

[0058] The humidity compensation coefficient K2 has a positive value and is configured to compensate for the decrease in circuit insulation performance and thyristor trigger delay effect caused by increased ambient humidity. High humidity environments may exacerbate leakage current in the peripheral circuits of the controllable rectifier module 30, reduce insulation strength, and cause trigger circuit response delay. The positive value of K2 provides positive adjustment in the compensation function, counteracting the humidity-induced delay by increasing the compensation parameter Δθ, ensuring timely correction of the trigger phase, and avoiding output voltage drift. The value of this coefficient ranges from 0.01° to 0.05° per percentage of relative humidity. Its relatively small range reflects that the effect of humidity is milder than that of temperature, but precise control is still required to improve system reliability.

[0059] The DC output side of the controllable rectifier module 30 is configured to provide at least two second adjustable DC voltages that are different from the first DC voltage.

[0060] The DC output side of the controllable rectifier module 30 is configured to provide at least two second adjustable DC voltages different from the first DC voltage. This configuration aims to meet the diverse operating voltage requirements of different load devices in textile power applications, achieving multiple independent DC power outputs through a single device, thereby improving system integration and power supply flexibility. The value of the second adjustable DC voltage can be precisely controlled by adjusting the trigger phase of the thyristor, allowing the output voltage to adapt to the specific operating parameter requirements of various textile electrical equipment.

[0061] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A special transformer device for textile power supply, characterized in that, It includes: The incoming line protection unit has its input terminal connected to a three-phase AC power supply. The main contactor, whose main contacts are connected in series to the output terminal of the incoming line protection unit; A fixed DC voltage output branch, the input terminal of which is connected to the main circuit after the incoming line protection unit, the fixed DC voltage output branch includes a first rectifier unit for outputting a fixed first DC voltage; A voltage conversion transformer, the primary winding of which is connected to the output terminal of the main contactor's main contacts; A controllable rectifier module, the AC input terminal of which is connected to the secondary winding of the voltage conversion transformer, is composed of multiple thyristors connected together; An environmental parameter monitoring module includes a temperature and humidity composite sensor array disposed around the voltage conversion transformer and / or the controllable rectifier module, for real-time acquisition of ambient temperature and ambient humidity values; The compensation control module has its signal input terminal connected to the environmental parameter monitoring module and its control signal output terminal connected to the thyristor trigger circuit of the controllable rectifier module. The compensation control module is configured to: dynamically calculate the compensation parameter Δθ for correcting the trigger phase of the thyristor based on the ambient temperature value and the ambient humidity value through an environmental stress compensation model; send the compensation parameter Δθ to the trigger circuit of the thyristor to dynamically correct the reference trigger phase θ1 of the thyristor, so as to stabilize the second adjustable DC voltage output by the controllable rectifier module. The DC output side of the controllable rectifier module is configured to provide at least two second adjustable DC voltages that are different from the first DC voltage.

2. The special transformer device for textile power supply as described in claim 1, characterized in that, The fixed DC voltage output branch also includes a switching switch, which is connected in series in the fixed DC voltage output branch and is used to control the on / off state of the fixed DC voltage output branch.

3. The special transformer device for textile power supply as described in claim 1, characterized in that, The temperature and humidity composite sensor array includes at least one temperature sensor and at least one humidity sensor. The temperature sensor is attached to the housing surface of the voltage conversion transformer, and the humidity sensor is located near the heat sink of the controllable rectifier module.

4. The special transformer device for textile power supply as described in claim 1, characterized in that, The environmental stress compensation model is specifically configured to calculate the compensation parameter Δθ using the following compensation function: Δθ = K1 × (T - T1) + K2 × (H - H1), where T is the real-time ambient temperature value, T1 is the preset reference temperature value; H is the real-time ambient humidity value, H1 is the preset reference humidity value; K1 is the temperature compensation coefficient, and K2 is the humidity compensation coefficient. The temperature compensation coefficient K1 and humidity compensation coefficient K2 satisfy the condition that |K1|>|K2|, wherein the temperature compensation coefficient K1 ranges from -0.5° to -0.1° per degree Celsius, and the humidity compensation coefficient K2 ranges from 0.01° to 0.05° per percentage of relative humidity.

5. The special transformer for textile power supply as described in claim 4, characterized in that, The temperature compensation coefficient K1 is used to compensate for the premature triggering of the thyristor and the change in the output voltage of the transformer caused by the increase in temperature; the humidity compensation coefficient K2 is used to compensate for the decrease in circuit insulation performance and the trigger delay effect caused by the increase in humidity.

6. The special transformer device for textile power supply as described in claim 1, characterized in that, The compensation control module is integrated into the thyristor trigger circuit, and the compensation control module is a microcontroller or a dedicated integrated circuit.

7. The special transformer device for textile power supply as described in claim 1, characterized in that, The controllable rectifier module is a three-phase fully controlled rectifier bridge or a three-phase semi-controlled rectifier bridge.

8. The special transformer for textile power supply as described in claim 1, characterized in that, The voltage conversion transformer also has an independent AC voltage winding for directly outputting an AC voltage.

9. The special transformer for textile power supply as described in claim 1, characterized in that, It also includes a control relay, the coil of which is powered by the first DC voltage output from the fixed DC voltage output branch, and the incoming line protection unit includes a circuit breaker and a fuse.

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