Voltage regulator capable of automatically regulating alternating current output voltage

Abstract

The utility model provides a voltage regulator capable of automatically regulating alternating current output voltage, and relates to the technical field of product test and measurement. Comprising an electric device; the electric device, the winding coil and the voltage feedback circuit are connected in sequence; the electric device is connected with an electric brush through a rotating shaft; the electric brush is in contact connection with the winding coil; the electric device drives the electric brush to slide on the winding coil to change the turn ratio of the winding coil so as to change the output voltage of the voltage regulator; the voltage feedback circuit is connected with the microcontroller unit; the microcontroller unit is connected with a motor driver, a display screen and a key panel of the electric device; the microcontroller unit is used for controlling the rotating direction and speed of the electric device through the motor driver; the key panel is used for setting the output voltage of the voltage regulator; the display screen is used for displaying the output voltage and the output current of the voltage regulator. The output voltage of the voltage regulator can be automatically fed back and regulated.

Description

Technical Field

[0001] This utility model relates to the field of product testing and measurement technology, and more specifically, to a voltage regulator that automatically adjusts the AC output voltage. Background Technology

[0002] In the field of product testing and measurement, it is often necessary to provide different input voltages to the product under test to evaluate electromagnetic compatibility, safety compliance, and product reliability under different voltages. Currently, in the laboratory, different voltages are adjusted using programmable AC power supplies and AC voltage regulators that change the turns ratio of the primary and secondary windings. This method has the following drawbacks: First, large laboratories generally need to make full use of their space and equipment resources to undertake more product testing tasks. If a corresponding programmable AC power supply is configured for each testing position, the cost of building the laboratory will be greatly increased due to the high price of programmable AC power supplies. Currently, most laboratories use a limited number of programmable AC power supplies to achieve AC frequency conversion, and then connect multiple voltage regulators to the outputs of different programmable AC power supplies to achieve voltage regulation for different testing positions. Second, most of the voltage regulators currently used are manually adjustable. Some may be equipped with electric actuators, but they lack a feedback voltage section and cannot be automatically adjusted. The required voltage value is adjusted by manually controlling the power-on and power-off time of the electric actuator by observing the value of the pointer voltmeter built into the voltage regulator or the voltmeter connected to the output terminal. This operation method is inefficient, and the range indicated by the pointer voltmeter is large, so the indicated voltage value observed by the naked eye is far from the actual voltage value. Third, it is impossible to achieve automated testing through remote control. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a voltage regulator that automatically adjusts the AC output voltage, so as to automatically adjust the output voltage of the voltage regulator through feedback.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0005] In a first aspect, embodiments of this application provide a voltage regulator that automatically adjusts the AC output voltage, comprising:

[0006] Electric actuators;

[0007] The electric actuator, winding coil, and voltage feedback circuit are connected in sequence; the electric actuator is also connected to the brush via a rotating shaft; the brush is in contact with the winding coil; the electric actuator changes the output voltage of the voltage regulator by driving the brush to slide on the winding coil to change the turns ratio of the winding coil.

[0008] The voltage feedback circuit is connected to the microcontroller unit; the microcontroller unit is connected to the motor driver, display screen, and keypad of the electric device; the microcontroller unit is used to control the rotation direction and speed of the electric device through the motor driver; the keypad is used to set the output voltage of the voltage regulator; the display screen is used to display the output voltage and output current of the voltage regulator.

[0009] The voltage feedback circuit includes a voltage transformer, a first amplifier circuit, and an analog-to-digital conversion module connected in sequence. The voltage transformer converts the voltage signal into a current signal, the first amplifier circuit converts the current signal into a voltage signal, and the analog-to-digital conversion module converts the voltage signal into a digital signal.

[0010] When the output voltage does not reach the set value, the microcontroller unit is used to adjust the rotation direction and speed of the electric device by adjusting the motor driver.

[0011] The microcontroller unit is connected to a remote control interface; the remote control interface is connected to an antenna; the remote control interface is used to set the output voltage of the voltage regulator via wired or wireless means, and to send the output voltage to the microcontroller unit via command.

[0012] The beneficial effects of this application are as follows: By installing an electric actuator, a microcontroller unit, and an output voltage feedback circuit on the voltage regulator, the output voltage of the regulator can be set via touch and buttons. The regulator automatically adjusts the output voltage and displays it in real time, replacing manual rotation and simple manual control of the electric actuator to adjust the voltage. This saves time and effort, greatly improving adjustment efficiency; and the automatically adjusted output voltage value is accurate. Furthermore, the realization of output voltage quantification, remote control, and data extraction makes it possible to introduce artificial intelligence into future laboratories, enabling highly intelligent and digitalized testing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of a voltage regulator that automatically adjusts the AC output voltage is provided in an embodiment of this application;

[0015] Figure 2A schematic diagram of the temporal connection of a voltage regulator that automatically adjusts the AC output voltage, provided in an embodiment of this application;

[0016] Figure 3 A circuit diagram of a voltage regulator that automatically adjusts the AC output voltage, provided for an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that if the terms "upper", "lower", etc. appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] Furthermore, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0022] Figure 1 A voltage regulator that automatically adjusts the AC output voltage is provided as an embodiment of this application; such as Figure 1 , Figure 2As shown, it includes:

[0023] Electric device 1;

[0024] Electric device 1, winding coil 2, and voltage feedback circuit 3 are connected in sequence; electric device 1 is also connected to brush 9 through a rotating shaft; brush 9 is in contact with winding coil 2; electric device 1 changes the output voltage of voltage regulator by driving brush 9 to slide on winding coil 2 to change the turns ratio of winding coil 2.

[0025] The voltage feedback circuit 3 is connected to the microcontroller unit 5; the microcontroller unit 5 is connected to the motor driver 8, the display screen 6, and the keypad 7 of the electric device 1; the microcontroller unit 5 is used to control the rotation direction and speed of the electric device 1 through the motor driver 8; the keypad 7 is used to set the output voltage of the voltage regulator; the display screen 6 is used to display the output voltage and output current of the voltage regulator.

[0026] The voltage feedback circuit 3 includes a voltage transformer 10, a first amplifier circuit 11, and an analog-to-digital converter module 12 connected in sequence. The voltage transformer 10 converts the voltage signal into a current signal, the first amplifier circuit 11 converts the current signal into a voltage signal, and the analog-to-digital converter module 12 converts the voltage signal into a digital signal.

[0027] When the output voltage does not reach the set value, the microcontroller unit 5 is used to adjust the rotation direction and speed of the electric device 1 by adjusting the motor driver 8.

[0028] The microcontroller unit 5 is connected to the remote control interface 4; the remote control interface 4 is connected to an antenna; the remote control interface 4 is used to set the output voltage of the voltage regulator via wired or wireless means, and to send the output voltage to the microcontroller unit 5 via command.

[0029] like Figure 3 The diagram shows the specific circuit diagram of the voltage regulator. The output terminal of the voltage regulator is connected in sequence to the current limiting resistor 13 and the voltage transformer 10. The voltage transformer 10 is connected to the first amplifier circuit 11 and the first feedback resistor 14. The first amplifier circuit 11 and the first feedback resistor 14 are connected to the microcontroller unit 5. The voltage output from the voltage regulator is converted into a current signal by the current limiting resistor 13 and the voltage transformer 10. Then, the current signal is converted into a voltage signal by the first amplifier circuit 11 and the first feedback resistor 14. Finally, the voltage signal is converted into a digital signal by the analog-to-digital conversion module 12 of the microcontroller unit 5. The voltage and frequency are then obtained and displayed in real time on the display screen.

[0030] The voltage regulator includes a current sensing transformer 15, which is connected to a second amplifier circuit 16, a second feedback resistor 17, and a microcontroller unit 5. The current signal output by the current sensing transformer 15 is converted into voltage by the second amplifier circuit 16 and the second feedback resistor 17, and then converted into a digital signal by the analog-to-digital conversion module 12 of the microcontroller unit 5, which is then used to obtain the current and displayed in real time on the display screen.

[0031] The voltage regulator includes a motor driver 8, which is an H-bridge motor driver. The motor driver 8 includes an N-channel first MOSFET 18, a second MOSFET 19, a third MOSFET 20, and a fourth MOSFET 21. The first MOSFET 18 and the third MOSFET 20 are connected to a first bootstrap circuit 22, and the second MOSFET 19 and the fourth MOSFET 21 are connected to a second bootstrap circuit 23. The first bootstrap circuit 22 and the second bootstrap circuit 23 are connected to a microcontroller unit 5 to control the rotation of the motor driver 88 in different directions.

[0032] In actual operation, the voltage, frequency, and current mentioned above are also obtained through remote control interface 4.

[0033] When the user sets the output voltage value of the voltage regulator via the display screen 6, button panel 7, or remote control interface 4, the I / O port of the microcontroller unit 5 generates a PWM signal and a direction signal. These signals are then transmitted through the first bootstrap circuit 22 and the second bootstrap circuit 23 to control the switching of the MOSFETs in the H-bridge of the motor driver 8, causing the electric device 1 to rotate in the correct direction. This drives the brushes 9 of the voltage regulator until the voltage signal detected at the output of the voltage regulator reaches the preset value.

[0034] It should be noted that the voltage transformer mentioned above is... Figure 3 The voltage detection circuit in the middle; the first amplifier mentioned above is the voltage detection circuit in the middle. Figure 2 The current-to-voltage amplifier circuit in the circuit; the first feedback resistor mentioned above is... Figure 3 R2 in the above-mentioned second feedback resistor is R2; Figure 3 R1 in the above-mentioned remote control interface is R1; Figure 3 The wireless communication module in the device.

[0035] The working principle of the voltage regulator that automatically adjusts the AC output voltage provided in this application embodiment is as follows: First, the output voltage of the voltage regulator is set through the button panel 7; or, the output voltage of the voltage regulator is set through the wired or wireless means of the remote control interface 4; second, the output voltage is sent to the microcontroller unit through a command; third, the microcontroller unit 5 adjusts the rotation direction and speed of the electric device 1 by adjusting the motor driver 8 according to the output voltage; then, the electric device 1 changes the output voltage of the voltage regulator by driving the brush 9 to slide on the winding coil 2 to change the turns ratio of the winding coil 2, until the output voltage reaches the set value. During this process, the display screen 6 displays the output voltage and output current of the voltage regulator in real time.

[0036] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A voltage regulator for automatically regulating the output voltage of an alternating current, characterized by, The utility model relates to a voltage regulator, including: Electric device; The electric device, winding coil, voltage feedback circuit are connected in turn;The electric device is also connected with the brush through the rotating shaft;The brush is connected with the winding coil;The electric device changes the turns ratio of the winding coil by driving the brush to slide on the winding coil to change the output voltage of the voltage regulator; The voltage feedback circuit is connected with the microcontroller unit;The microcontroller unit is connected with the motor driver of the electric device, display screen and key panel;The microcontroller unit is used for controlling the rotating direction and speed of the electric device through the motor driver;The key panel is used for setting the output voltage of the voltage regulator;The display screen is used for displaying the output voltage and output current of the voltage regulator.

2. The pressure regulator of claim 1, wherein, The voltage feedback circuit includes a voltage transformer, a first amplification circuit, and an analog-to-digital conversion module connected in turn;The voltage transformer converts the voltage signal into a current signal, then the first amplification circuit converts the current signal into a voltage signal, and finally the analog-to-digital conversion module converts the voltage signal into a digital signal.

3. The pressure regulator of claim 1, wherein, When the output voltage does not reach the set value, the microcontroller unit is used to adjust the rotating direction and speed of the electric device by adjusting the motor driver.

4. The pressure regulator of claim 1, wherein, The microcontroller unit is connected with a remote control interface;The remote control interface is connected with an antenna;The remote control interface is used to set the output voltage of the voltage regulator through wired or wireless means, and the output voltage is sent to the microcontroller unit through instructions.

5. The pressure regulator of claim 1, wherein, The output end of the voltage regulator is connected with a current limiting resistor and a voltage transformer in turn, and the voltage transformer is connected with a first amplification circuit and a first feedback resistor respectively;The first amplification circuit and the first feedback resistor are connected with a microcontroller unit;The voltage output by the voltage regulator is converted into a current signal through the current limiting resistor and the voltage transformer, then the current signal is converted into a voltage signal through the first amplification circuit and the first feedback resistor, then the voltage signal is converted into a digital signal through the analog-to-digital conversion module of the microcontroller unit, and finally the voltage and frequency are obtained and displayed in real time on the display screen.

6. The pressure regulator of claim 1, wherein, The voltage regulator includes a current detection transformer, which is connected with a second amplification circuit, a second feedback resistor, and a microcontroller unit respectively;The current signal output by the current detection transformer is converted into a voltage through the second amplification circuit and the second feedback resistor, and then converted into a digital signal through the analog-to-digital conversion module of the microcontroller unit, and finally the current is obtained and displayed in real time on the display screen.

7. The pressure regulator of claim 1, wherein, The voltage regulator includes an H-bridge, which includes N-channel first, second, third, and fourth MOS transistors;The first and third MOS transistors are connected with a first bootstrap circuit, and the second and fourth MOS transistors are connected with a second bootstrap circuit;The first and second bootstrap circuits are connected with a microcontroller unit to control the rotation of the motor driver in different directions.

8. The pressure regulator of claim 1, wherein, Voltage, frequency, current are acquired through remote control interface.

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