Wide-voltage-range stepless voltage regulation method and wide-voltage-range stepless voltage regulation device

Abstract

The invention discloses a wide-voltage-range stepless voltage regulation method and a wide-voltage-range stepless voltage regulation device, and belongs to the field of stepless voltage regulation. The wide-voltage-range stepless voltage regulation method comprises the steps that a system is initialized, input high-voltage alternating current firstly enters a transformer, and the high-voltage alternating current is converted into low-voltage alternating current; current data passing through a motor are collected in real time through a current transformer, alternating current passing through the current transformer enters a rectifier, the alternating current is converted into direct current, the direct current serves as a working power source of a system, the direct current passes through a filter, and filtered pulse direct current is input into a controller. The controller controls the input voltage and current to be preliminarily adjusted; the silicon controlled rectifier is used for receiving the control signal output by the controller so as to realize voltage regulation, and realizing accurate regulation on the output voltage by changing the frequency and the duty ratio of the pulse signal; the voltage adjusted by the silicon controlled rectifier directly acts on the motor. According to the invention, stepless continuous adjustment can be realized, and the output voltage can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the field of stepless voltage regulation, and in particular, to a stepless voltage regulation method and device with a wide voltage range. Background Art

[0002] Stepless voltage regulation devices, as technical equipment capable of precisely adjusting output voltage and current, are widely used in various industrial and experimental fields that require voltage transformation and voltage control. Traditional voltage regulation technologies usually rely on transformers, mechanical regulators, or fixed voltage control systems, which have certain limitations, especially in terms of accuracy, flexibility, and system stability, and there are obvious drawbacks. For example, the regulation accuracy is low. Traditional voltage regulation devices, such as transformers or mechanical regulators, usually adopt step-by-step voltage regulation or adjust the voltage by rotating the regulator. This method not only has great limitations in regulation accuracy but also is not flexible enough in operation. In scenarios where precise voltage regulation is required, it often cannot meet the stringent voltage control requirements. The volume and weight are large. Traditional voltage regulation devices usually require large-volume transformers and electrical components. Especially in high-power devices, the volume and weight have become an important factor restricting the installation and use of the devices. These large devices are not conducive to the modern lightweight and compact design requirements. Summary of the Invention

[0003] One of the objectives of the present invention is to provide a stepless voltage regulation method with a wide voltage range to solve the disadvantage of low regulation accuracy of stepless voltage regulation devices in the prior art.

[0004] The present invention is achieved through the following technical solutions. A stepless voltage regulation method with a wide voltage range includes the following steps: S100: System initialization. The input high-voltage alternating current first enters the transformer to convert the high-voltage alternating current into low-voltage alternating current; S200: Through the current transformer, the current data passing through the motor is collected in real time. The alternating current passing through the current transformer enters the rectifier to convert the alternating current into direct current. The direct current serves as the working power supply of the system. At the same time, the direct current passes through the filter to eliminate the pulses generated during the rectification process. The filtered pulsed direct current is input into the controller, and the controller controls the preliminary regulation of the input voltage and current; S300: The thyristor receives the control signal output by the controller to achieve voltage regulation. The thyristor adopts pulse width modulation technology to adjust the voltage pulse width. By changing the frequency and duty cycle of the pulse signal, precise regulation of the output voltage is achieved to achieve the effect of voltage regulation or voltage stabilization; S400: The voltage regulated by the thyristor directly acts on the motor to drive the motor to operate.

[0005] Further, the controller includes a fuzzy controller and a neural network module.

[0006] Furthermore, the fuzzy controller is used to generate a preliminary control strategy through a fuzzy rule base, output a control signal to the next-level regulating device, and perform preliminary regulation on the input voltage and current.

[0007] Furthermore, the input nodes of the neural network module are used to receive the fuzzy control output, real-time voltage, and current, and at the same time configure the backpropagation algorithm of the neural network, so as to realize the self-learning mechanism.

[0008] Furthermore, the neural network module also includes using the historical operation data of the system as the initial training data of the neural network, importing the initial training dataset obtained after the initial training into the neural network module, enabling the neural network module to self-learn through the real-time monitored data, continuously adjusting and optimizing the PWM signal, and making the output voltage stable.

[0009] Furthermore, step S400 also includes continuously feeding back the real-time current and voltage data to the controller, and the controller adjusts the control strategy in real time according to the feedback data.

[0010] On the other hand, the present invention also provides a wide-voltage-range stepless voltage regulating device, which is sequentially composed of a transformer, a current transformer, a controller, a thyristor, a motor, and a push-button switch connected in sequence, and a power supply and a fuse; the transformer is used to convert the input high-voltage alternating current into a lower-voltage alternating current, provide a voltage suitable for the control circuit and other device requirements, and improve the safety of the circuit; the current transformer is used to measure the current passing through the device and feed back the current signal to the controller, and through feedback regulation, ensure the stability and safety of the current; the controller is used to receive the feedback signal from the current transformer and realize voltage regulation through the thyristor, and also has system monitoring and protection functions; the thyristor adopts electronic switching technology to precisely regulate the output voltage through a pulse width modulation signal to achieve the target voltage output and ensure the continuity of the current and the efficient operation of the device; the motor is driven by the voltage regulated by the thyristor, and its operating state is controlled by the push-button switch to realize the start and stop operations of the motor; the push-button switch is used to manually control the operation of the motor, including a start button and a stop button, to facilitate the user to directly control and operate the device; the power supply provides a DC voltage through a rectifier, enters the controller and other components after being protected by a power switch and a fuse, ensures the safety and reliability of the operation of the entire device, and protects the circuit safety of the device through the fuse.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0012] 1. The present invention adjusts the output voltage by using thyristors and pulse width modulation (PWM) technology, achieving stepless continuous adjustment and enabling precise control of the output voltage. This stepless adjustment method is more flexible and adaptable than traditional step-by-step voltage regulation, capable of providing more accurate voltage control to meet complex application requirements.

[0013] 2. The present invention employs electronic components such as thyristors, making the present invention significantly smaller in volume and weight compared to traditional voltage regulation devices. Thyristors and controllers replace traditional mechanical regulators and large transformers, making the overall device more compact and meeting the requirements of modern devices for lightweight and high efficiency.

[0014] 3. Through electronic switches and PWM control technology, the system of the present invention can achieve higher energy efficiency. The adoption of thyristors reduces energy losses, compared with traditional mechanical regulation and transformer methods, thus being able to convert and control voltage more effectively, greatly improving the energy efficiency of the overall system and reducing unnecessary heat generation and energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0016] Figure 1 is the primary circuit diagram of the stepless voltage regulator with a wide voltage range provided in Embodiment 1 of the present invention.

[0017] Figure 2 is the secondary circuit diagram of the stepless voltage regulator with a wide voltage range provided in Embodiment 1 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0019] Embodiment 1:

[0020] This embodiment discloses a stepless voltage regulator with a wide voltage range. Figure 1 shows the primary diagram of the stepless voltage regulator with a wide voltage range of this embodiment. Figure 2The secondary diagram of the stepless voltage regulator with a wide voltage range in this embodiment is shown. Among them, the primary diagram is used to display the circuit connections of the high-voltage part of the power system or equipment, the main electrical connections from the power supply to the load, including transformers, circuit breakers, busbars, switchgear, etc. The primary diagram focuses more on the main power transmission and transformation functions and shows the power path and connection relationships of the entire system. Such diagrams usually deal with electrical connections at higher voltages. The secondary diagram is used to display the electrical connections of the low-voltage control circuits and auxiliary equipment inside the device, including relays, contactors, controllers, signal lights, buttons, etc. The focus of such diagrams is on control logic, protection devices, and the operation control of the device, etc. Such diagrams deal with the control circuit part inside the device, with lower voltages and more refined operation parts.

[0021] As can be seen from the figure, Figure 1 The primary diagram shown includes: the main transformer equipment of the transformer (TA1); current transformers (IA, Ia); for current detection; the main control equipment of the controller (KZQ); thyristor non-contact switches; the motor (M) as one of the main loads; the power supply and fuses (FU1, FU2) for power protection and power supply equipment.

[0022] Figure 2 The secondary diagram shown includes: AC input, A in and N in, indicating the received AC power input; the fuse (QF1) provides protection and can interrupt the power supply; the thyristor controls the current path to achieve the voltage regulation effect; the transformer (T1) steps down the voltage from 175V to 50V for further processing; the push-button switch (KJ1) is the manual control part of the switch; the output (A out and N out): the terminal of the regulated output.

[0023] Figure 1 The primary diagram in shows the overall layout and main circuit design of the power system, while Figure 2 the secondary diagram in provides the design of the detailed control, protection, and operation parts.

[0024] From Figure 1 it can be seen that the stepless voltage regulator with a wide voltage range in this embodiment is sequentially composed of a transformer, current transformers, a controller, thyristors, a motor, and a push-button switch connected in sequence, as well as a power supply and fuses.

[0025] Among them, the transformer is used to convert the input high-voltage alternating current into lower-voltage alternating current, provide a voltage suitable for the needs of the control circuit and other devices, and enhance the safety of the circuit.

[0026] The current transformer is used to measure the current passing through the device and feed the current signal back to the controller to ensure the stability and safety of the current through feedback regulation.

[0027] The controller is used to receive the feedback signal from the current transformer, regulate the voltage through the thyristor, and also has system monitoring and protection functions.

[0028] The thyristor adopts electronic switch technology and precisely regulates the output voltage through the Pulse Width Modulation (PWM) signal to achieve the target voltage output, ensuring the continuity of the current and the efficient operation of the device.

[0029] The motor is driven by the voltage regulated by the thyristor, and its operating state is controlled by the push-button switch to realize the start and stop operations of the motor.

[0030] The push-button switch is used to manually control the operation of the motor, including the start button and the stop button, to facilitate the user to directly control and operate the device.

[0031] The power supply provides a DC voltage through the rectifier, and after passing through the power switch and fuse protection, it enters the controller and other components, ensuring the safety and reliability of the operation of the entire device, and protecting the circuit safety of the device through the fuse.

[0032] Embodiment 2:

[0033] In this embodiment, a stepless voltage regulation method with a wide voltage range is disclosed. By this method, a stepless voltage regulation device with a wide voltage range in Embodiment 1 is controlled, thereby realizing stepless voltage regulation within a wide voltage range.

[0034] Specifically, the method in this embodiment includes the following steps:

[0035] Step 1: First, perform system initialization, turn on the power supply, check the transformer (TA1) to ensure that the input high-voltage alternating current is normal. Check the rectifier (DY1) to confirm that it can work properly and convert the alternating current into direct current. Check all connections and wiring to ensure they are correct.

[0036] The input alternating current (AC) first enters the transformer (TA1), which converts the high-voltage alternating current into a lower-voltage alternating current, improving the safety of the circuit and providing a voltage suitable for the control loop and the needs of other devices.

[0037] Step 2: Prepare the hardware components, install the current transformers (IA, Ia) to ensure that they can collect the current data passing through the motor (M) in real time. Install the controller (KZQ) and load the fuzzy controller and neural network model in the controller. Install the thyristor to ensure that it can receive various control signals to achieve voltage regulation. Check the push-button switch (KJ1) to confirm that the start and stop button functions are normal, ensuring that the operating state of the motor (M) can be manually controlled.

[0038] Specifically, alternating current (AC) with a lower voltage passes through current transformers (IA, Ia). The current transformers are used to measure the current for real-time monitoring and feedback of the current information.

[0039] Then, the alternating current passing through the transformers enters a rectifier (DY1), which converts the alternating current into direct current (DC). This direct current serves as the working power supply for the system. Next, the direct current passes through a filter to eliminate the pulsations generated during the rectification process, making the voltage smoother and more stable.

[0040] The filtered direct current is input into a controller (KZQ). The controller first performs a preliminary adjustment on the input voltage and current through the fuzzy control method. The controller receives the current signal feedback from the current transformer and the voltage signal of the system, generates a preliminary control strategy through the fuzzy rule base, and outputs a control signal to the next-level adjustment device.

[0041] Step 3: Set up a fuzzy controller. Configure signal input ports in the controller (KZQ) to receive the current signal from the current transformer. Current signal input terminal: Connect the output lines of IA and Ia to the input port of the controller. Write or configure the fuzzy control rule base.

[0042] Then set the fuzzy variables. Set the input voltage and current as fuzzy variables, such as "high", "medium", "low". At the same time, write the rule base: for example, "If the voltage is high and the current is high, then reduce the duty cycle of the PWM signal". Configure the fuzzy control output for controlling the PWM signal of the thyristor. Finally, set the output variables: such as "increase the duty cycle", "decrease the duty cycle".

[0043] The control signal is transmitted to the thyristor. The thyristor adopts pulse width modulation (PWM) technology to precisely adjust the voltage pulse width. By changing the frequency and duty cycle of the PWM signal, precise adjustment of the output voltage is achieved, striving to reach the desired voltage regulation or voltage stabilization effect.

[0044] In this embodiment, by configuring a neural network module in the controller, the input nodes of the neural network module are used to receive the fuzzy control output, real-time voltage, and current. At the same time, configure the backpropagation algorithm (BP algorithm) of the neural network to achieve a self-learning mechanism.

[0045] Use the historical operation data of the system as the initial training data for the neural network. At the same time, import the initial training dataset obtained after the initial training into the neural network module configured in the controller. Thus, the setting and adaptive PWM signal output under different voltage and current conditions are achieved.

[0046] That is to say, the neural network model runs inside the controller. The neural network self-learns through the real-time monitored data, continuously adjusts and optimizes the PWM signal to make the output voltage more stable. The neural network is trained with the backpropagation algorithm (BP) and continuously adjusts the control signal of the thyristor according to the historical data and real-time feedback.

[0047] Step 4: Finally, the voltage adjusted by the thyristor directly acts on the motor (M) to drive the motor to operate. And the real-time current and voltage data are continuously fed back to the controller. The controller will adjust the control strategy in real time according to the latest feedback data to ensure that the motor can operate stably under different loads and working conditions.

[0048] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for stepless voltage regulation in a wide voltage range, characterized in that: The stepless voltage regulation method comprises: S100: System initialization, the input high voltage AC first enters the transformer, which converts the high voltage AC into low voltage AC; S200: Through the current transformer, the current data passing through the motor is collected in real time. The alternating current through the current transformer enters the rectifier, which converts the alternating current into direct current. The direct current is used as the working power supply of the system. At the same time, the direct current passes through a filter to eliminate the pulses generated during the rectification process. The filtered pulse direct current is input into the controller, and the input voltage and current are preliminarily adjusted through the controller. S300: a thyristor, which receives a control signal output by a controller to achieve voltage regulation. The thyristor uses a pulse width modulation technology to adjust the voltage pulse width. By changing the frequency and duty cycle of the pulse signal, the output voltage can be precisely adjusted to achieve the effect of voltage regulation or voltage stabilization; S400: The voltage adjusted by the thyristor directly acts on the motor to drive the motor to run.

2. The wide voltage range stepless voltage regulation method according to claim 1, characterized in that: The controller includes a fuzzy controller and a neural network module.

3. The wide voltage range stepless voltage regulation method according to claim 2, characterized in that: The fuzzy controller is used to generate a preliminary control strategy through a fuzzy rule base, output a control signal to a next-level regulating device, and perform preliminary regulation on input voltage and current.

4. The wide voltage range stepless voltage regulation method according to claim 2, characterized in that: The input node of the neural network module is used to receive fuzzy control output, real-time voltage, and current. At the same time, the back propagation algorithm of the neural network is configured to realize the self-learning mechanism.

5. The wide voltage range stepless voltage regulation method according to claim 4, characterized in that: The neural network module also includes using the historical operation data of the system as initial training data for the neural network, and importing the initial training data set obtained after the initial training into the neural network module, so that the neural network module can self-learn through real-time monitoring data, continuously adjust and optimize the PWM signal, and stabilize the output voltage.

6. The method for stepless voltage regulation in a wide voltage range according to claim 1, characterized in that: The step S400 also includes continuously feeding back the real-time current and voltage data to the controller, and the controller adjusts the control strategy in real time according to the fed-back data.

7. A stepless voltage regulator with a wide voltage range, characterized in that: The device is sequentially connected by a transformer, a current transformer, a controller, a thyristor, a motor and a button switch. And the power supply and fuse composition; The transformer is used to convert the input high-voltage AC power into a lower-voltage AC power, provide a voltage suitable for the control circuit and other devices, and improve the safety of the circuit; The current transformer is used to measure the current passing through the device and feed back the current signal to the controller to ensure the stability and safety of the current through feedback regulation; The controller is used to receive feedback signals from the current transformer and realize voltage regulation through the thyristor, and also has system monitoring and protection functions; The thyristor adopts electronic switch technology to control the precise adjustment of output voltage through pulse width modulation signal to achieve target voltage output and ensure the continuity of current and efficient operation of the equipment; The motor is driven by a voltage adjusted by a thyristor, and its operating state is controlled by a button switch to realize the start and stop operation of the motor; The button switch is used to manually control the operation of the motor, including a start button and a stop button, so that the user can directly control and operate the device; The power supply provides a DC voltage through a rectifier, and enters the controller and other components after passing through a power switch and fuse protection, ensuring the safety and reliability of the operation of the entire device, and protecting the circuit safety of the device through the fuse.

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