Voltage-adjustable power supply and test board

Abstract

The utility model provides a voltage-adjustable power supply and a test board to solve the problem that although a voltage-adjustable power supply in the existing digital control scheme in the prior art supports software voltage regulation, an extra ADC / DAC module is needed, and microsecond delay is introduced. The power supply comprises an input module, a rectification module, a filtering module, an adjustable voltage stabilization module and a control module. An adjustable voltage stabilization module and a control module are developed based on an FPGA chip, the high-speed parallel processing characteristic of the FPGA is utilized, an extra ADC / DAC module is not needed, introduction of microsecond delay is avoided, the communication speed is greatly improved, and nanosecond response can be achieved. A transformer in the input module realizes electrical isolation, so that the safety is enhanced; and the filtering module effectively filters high-frequency noise. The control module receives an instruction of an upper computer to control output voltage, and flexibility is high. Electronic components of the adjustable voltage stabilizing module and the FPGA chip are integrated on the same PCB card, so that the reliability and the response speed are improved.

Description

Technical Field

[0001] This utility model relates to the field of automatic testing technology, and in particular to an adjustable voltage power supply and a test bench. Background Technology

[0002] As electronic devices increasingly demand higher power quality, the demand for adjustable voltage power supplies is growing in industrial control, laboratory testing, and precision instrument fields.

[0003] While existing digital control solutions with adjustable voltage power supplies support software voltage regulation, they require additional ADC / DAC modules, introducing microsecond-level delays that make it difficult to meet the fast response requirements of precision loads. Utility Model Content

[0004] This invention addresses the problem that existing digital control schemes, while supporting software voltage regulation, require additional ADC / DAC modules, introducing microsecond-level delays. It provides an adjustable voltage power supply and a test bench.

[0005] The technical solution adopted in this utility model is:

[0006] An adjustable voltage power supply, comprising:

[0007] The input module includes an input interface and a transformer; the input interface is connected to the mains power supply; the input terminal of the transformer is connected to the input interface, and the transformer converts the mains voltage into a lower AC voltage; the output terminal of the transformer is the output terminal of the input module.

[0008] A rectifier module is used to convert alternating current (AC) to direct current (DC); the input terminal of the rectifier module is connected to the output terminal of the input module.

[0009] The filter module is used to filter out high-frequency noise; the input of the filter module is connected to the output of the rectifier module.

[0010] An adjustable voltage regulator module is included; its input is connected to the output of a filter module, and its output is connected to external electrical equipment.

[0011] The control module has an input terminal connected to an external host computer to receive commands from the host computer; the output terminal of the control module is connected to the control terminal of the adjustable voltage regulator module to control the output voltage of the adjustable voltage regulator module.

[0012] The adjustable voltage regulator module is a digital hardware module board developed based on an FPGA chip, which is used to improve communication speed; the control module is a circuit developed inside the FPGA chip.

[0013] Furthermore, the control module includes an instruction parsing submodule and a target voltage-RP resistance value mapping submodule;

[0014] The input terminal of the instruction parsing submodule is connected to the host computer, and the instruction parsing submodule is used to parse the instructions issued by the host computer;

[0015] The input terminal of the target voltage-RP resistance value mapping submodule is connected to the output terminal of the instruction parsing submodule, and the output terminal of the target voltage-RP resistance value mapping submodule is connected to the control terminal of the adjustable voltage regulator module. The target voltage-RP resistance value mapping submodule is used to convert the instruction parsed by the instruction parsing submodule into an RP resistance value, and the target voltage-RP resistance value mapping submodule sends the RP resistance value to the control terminal of the adjustable voltage regulator module.

[0016] Furthermore, the adjustable voltage regulator module includes capacitor C1, capacitor C2, resistors R1, R2, R3, R4, R5, electronic variable resistor RP, transistors V1, V2, and V3; transistor V2 is an NPN type transistor, and transistor V3 is a PNP type transistor.

[0017] One end of capacitor C1 is connected to the input terminal of the adjustable voltage regulator module; the other end of capacitor C1 is grounded; capacitor C1 is also connected in parallel to the input terminal of the adjustable voltage regulator module; the positive terminal of the adjustable voltage regulator module's input is connected in series with resistor R1, electronic variable resistor RP, resistor R2, and resistor R3 and grounded; the input terminal of electronic variable resistor RP is connected to resistor R1, and the output terminal of electronic variable resistor RP is connected to resistor R2; the collector of transistor V1 is connected to the connection point between capacitor C1 and resistor R1; the base of transistor V1 is connected to the connection point between resistor R1 and the input terminal of electronic variable resistor RP; the control terminal and input terminal of electronic variable resistor RP are connected in parallel. Connected to the control module; the control terminal and input terminal of the electronic variable resistor RP are both control terminals of the adjustable voltage regulator module; the base of transistor V1 is connected in series with resistors R4 and R5 to the collector of transistor V2; the base of transistor V2 is connected to the connection point between resistors R2 and R3; the emitter of transistor V2 is grounded; the emitter of transistor V3 is connected to the base of transistor V1; the base of transistor V3 is connected to the connection point between resistors R4 and R5; the collector of transistor V3 is grounded; one end of capacitor C2 is connected to the emitter of transistor V1; the other end of capacitor C2 is grounded; simultaneously, capacitor C2 is connected in parallel to the output terminal of the adjustable voltage regulator module.

[0018] Furthermore, the electronic variable resistor RP is selected from the AD5272 chip; the A terminal of the AD5272 chip is the input terminal of the electronic variable resistor RP; the W terminal of the AD5272 chip is the control terminal of the electronic variable resistor.

[0019] Furthermore, the total resistance of the electronic variable resistor RP is more than 500 times the resistance of resistor R1.

[0020] Furthermore, the resistance values ​​of resistors R2, R3, R4, and R5 are all 49 to 51 times the resistance value of resistor R1.

[0021] Based on the same inventive concept, this utility model also provides a test stand, which includes the aforementioned adjustable voltage power supply.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides an adjustable voltage power supply and test bench based on an FPGA chip, developing an adjustable voltage regulator module and control module. Utilizing the high-speed parallel processing capabilities of the FPGA, it eliminates the need for an additional ADC / DAC module, avoiding microsecond-level delays and significantly improving communication speed. It achieves nanosecond-level response, meeting the rapid response requirements of precision loads. The transformer in the input module provides electrical isolation, enhancing safety; the filtering module effectively filters out high-frequency noise, improving power supply stability. The control module receives commands from the host computer to control the output voltage, offering high flexibility. The adjustable voltage regulator module's electronic components and the FPGA chip are integrated on the same PCB board, shortening the signal transmission path and further improving reliability and response speed. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0025] Figure 1 Diagram of an adjustable voltage power supply architecture;

[0026] Figure 2 This is a circuit diagram of an adjustable voltage regulator module. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0028] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0029] The following is in conjunction with the appendix Figure 1 and attached Figure 2 The embodiments of the utility model will be described in detail.

[0030] The voltage-adjustable power supply disclosed in this embodiment includes the following components: input module 11, rectifier module 2, filter module 3, adjustable voltage regulator module 4, and control module 5. Based on the complete voltage-adjustable power supply structure 9, this embodiment also provides an AC power supply 6, external power devices 7, and a host computer 8. (See attached...) Figure 1 As shown.

[0031] Input module 1 includes an input interface 11 and a transformer 12; the input interface 11 is connected to the mains power supply 6; the input terminal of the transformer 12 is connected to the input interface 11, and the transformer 12 converts the mains voltage into a lower AC voltage; the output terminal of the transformer 12 is the output terminal of input module 1.

[0032] The rectifier module 2 is used to convert AC power into DC power; the input terminal of the rectifier module 2 is connected to the output terminal of the input module 1.

[0033] The filter module 3 is used to filter out high-frequency noise; the input terminal of the filter module 3 is connected to the output terminal of the rectifier module 2.

[0034] The input terminal of the adjustable voltage regulator module 4 is connected to the output terminal of the filter module 3; the output terminal of the adjustable voltage regulator module 4 is connected to the external electrical equipment 7.

[0035] The input terminal of the control module 5 is connected to the external host computer 8 to receive instructions from the host computer 8; the output terminal of the control module 5 is connected to the control terminal of the adjustable voltage regulator module 4 to control the output voltage of the adjustable voltage regulator module 4.

[0036] Among them, the adjustable voltage regulator module 4 is a digital hardware module board developed based on the FPGA chip, which is used to improve the communication speed; the control module 5 is a circuit developed inside the FPGA chip; the electronic components in the adjustable voltage regulator module 4 and the FPGA chip are mounted on the same PCB board.

[0037] The working principle of the voltage adjustable power supply disclosed in this embodiment is as follows:

[0038] Step S1, Mains Input and Preprocessing: Mains power (220V AC) is connected to an input filter capacitor (e.g., a 3300μF / 35V electrolytic capacitor) through input interface 11 to filter out high-frequency noise and electromagnetic interference from the power grid. The high-voltage AC power is then stepped down to a low-voltage AC power (28V AC) suitable for subsequent processing via transformer 12. Transformer 12 also provides electrical isolation between the input and output, enhancing safety.

[0039] In step S2, the 28V AC voltage output by transformer 12 is converted into DC voltage by rectifier module 2.

[0040] In step S3, the DC voltage output from rectifier module 2 enters filter module 3 to filter out high-frequency noise, and then enters adjustable voltage regulator module 4. Adjustable voltage regulator module 4 outputs the regulated voltage. Control module 5 receives and parses the target voltage data (the regulated voltage value output by adjustable voltage regulator module 4) sent by host computer 8, and then sends it to the adjustable voltage regulator module to control the regulated voltage value output by adjustable voltage regulator module 4.

[0041] In step S4, the voltage output by the adjustable voltage regulator module 4 is fed into the external electrical equipment 7.

[0042] The beneficial effects of the above technical solution are as follows: Based on the FPGA chip, the adjustable voltage regulator module 4 and control module 5 are developed. Utilizing the high-speed parallel processing characteristics of the FPGA, no additional ADC / DAC module is needed, avoiding the introduction of microsecond-level delays, significantly improving communication speed, and achieving nanosecond-level response, which can meet the rapid response requirements of precision loads. The transformer 12 in the input module 1 provides electrical isolation, enhancing safety; the filter module 3 effectively filters out high-frequency noise, improving power supply stability. The control module 5 receives commands from the host computer 8 to control the output voltage, offering high flexibility. The electronic components of the adjustable voltage regulator module 4 are integrated with the FPGA chip on the same PCB board, shortening the signal transmission path and further improving reliability and response speed.

[0043] Furthermore, the control module 5 includes an instruction parsing submodule 51 and a target voltage-RP resistance mapping submodule 52; both the instruction parsing submodule 51 and the target voltage-RP resistance mapping submodule 52 are modules developed internally within the FPGA chip, i.e., integrated circuits within the FPGA chip. (See attached...) Figure 1 As shown.

[0044] The input terminal of the instruction parsing submodule 51 is connected to the host computer 8. The instruction parsing submodule 51 is used to parse the instructions issued by the host computer 8.

[0045] The input terminal of the target voltage-RP resistance value mapping submodule 52 is connected to the output terminal of the instruction parsing submodule 51, and the output terminal of the target voltage-RP resistance value mapping submodule 52 is connected to the control terminal of the adjustable voltage regulator module 4. The target voltage-RP resistance value mapping submodule 52 is used to convert the instruction parsed by the instruction parsing submodule 51 into an RP resistance value, and the target voltage-RP resistance value mapping submodule 52 sends the RP resistance value to the control terminal of the adjustable voltage regulator module 4.

[0046] The beneficial effects of the above technical solution are as follows: Through the synergistic effect of the instruction parsing submodule 51 and the target voltage-RP resistance mapping submodule 52, the intelligence and ease of use of the voltage-adjustable power supply are significantly improved: the user only needs to input the target voltage value on the host computer 8, and the control module 5 can automatically complete the instruction parsing and parameter mapping, eliminating the need for manual configuration of complex parameters and greatly reducing the operational threshold. The dual modules are integrated inside the FPGA chip to form a pure hardware circuit, with data processing speeds reaching nanosecond levels, achieving real-time and precise control of the output voltage, avoiding the millisecond-level delay of traditional software algorithms, and are particularly suitable for the dynamic voltage requirements of precision instruments. The automatic mapping mechanism eliminates the errors that may be caused by manual parameter conversion, and combined with the high reliability of the FPGA, it can operate stably in industrial environments for a long time. This "input-as-you-go" intelligent control mode enables the power supply system to maintain high precision while significantly improving ease of use and system response speed.

[0047] Furthermore, the adjustable voltage regulator module 4 includes capacitor C1, capacitor C2, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, electronic variable resistor RP, transistor V1, transistor V2, and transistor V3; transistors V1 and V2 are NPN type transistors, and transistor V3 is a PNP type transistor.

[0048] As attached Figure 2 As shown.

[0049] One end of capacitor C1 is connected to the input terminal of the adjustable voltage regulator module 4; one end of capacitor C1 is grounded; simultaneously, capacitor C1 is connected in parallel to the input terminal of the adjustable voltage regulator module 4; the positive terminal of the adjustable voltage regulator module 4 is connected in series with resistor R1, electronic variable resistor RP, resistor R2, and resistor R3 and grounded; the input terminal of electronic variable resistor RP is connected to resistor R1, and the output terminal of electronic variable resistor RP is connected to resistor R2; the collector of transistor V1 is connected to the connection point between capacitor C1 and resistor R1; the base of transistor V1 is connected to the connection point between resistor R1 and the input terminal of electronic variable resistor RP; the control terminal and input terminal of electronic variable resistor RP are connected in parallel. Connected to control module 5; the control terminal and input terminal of electronic variable resistor RP are both control terminals of adjustable voltage regulator module 4; the base of transistor V1 is connected in series with resistors R4 and R5 to the collector of transistor V2; the base of transistor V2 is connected to the connection point between resistors R2 and R3; the emitter of transistor V2 is grounded; the emitter of transistor V3 is connected to the base of transistor V1; the base of transistor V3 is connected to the connection point between resistors R4 and R5; the collector of transistor V3 is grounded; one end of capacitor C2 is connected to the emitter of transistor V1; the other end of capacitor C2 is grounded; at the same time, capacitor C2 is connected in parallel to the output terminal of adjustable voltage regulator module 4.

[0050] Among them, the electronic variable resistor RP uses the AD5272 chip; the A terminal of the AD5272 chip is the input terminal of the electronic variable resistor RP; the W terminal of the AD5272 chip is the control terminal of the electronic variable resistor.

[0051] The components selected in this embodiment are as follows: the input voltage of the adjustable voltage regulator module 4 is DC28V. The electronic variable resistor RP is a version with a total resistance of 200KΩ, capacitor C1 is a 3300µF electrolytic capacitor, and capacitor C2 is a 470µF electrolytic capacitor. Resistor R1 has a resistance of 200Ω, and resistors R2, R3, R4, and R5 have resistances of 10KΩ.

[0052] The working principle of the above technical solution is as follows: The voltage filtered by capacitor C1 is supplied to the base of transistor V1 by resistor R1, turning on transistor V1. When transistor V1 is on, the voltage passes through the electronic variable resistor RP and resistor R2, turning on transistor V2. Then transistor V3 also turns on. At this time, the emitter and collector voltages of transistors V1, V2, and V3 no longer change. Adjusting the electronic variable resistor RP can obtain a stable output voltage. The output voltage value of this circuit is determined by the ratio of resistor R1, electronic variable resistor RP, resistor R2, and resistor R3.

[0053] The beneficial effects of the above technical solution are as follows: by selecting the AD5272 chip as the electronic variable resistor RP, the resistance value of the electronic variable resistor RP can be precisely and conveniently adjusted by sending commands from the host computer 8; the resistance value of the electronic variable resistor RP is much larger than that of resistors R1 and R2. By adjusting the resistance value of the electronic variable resistor RP, and through the two-stage amplification of transistors V2 and V3, the voltage across capacitor C2 can be adjusted over a wide range. The voltage across capacitor C2 is the output voltage of the adjustable voltage regulator module 4.

[0054] Based on the same inventive concept, this embodiment also provides a test bench, which includes the aforementioned voltage adjustable power supply.

Claims

1. A voltage-adjustable power supply, characterized in that, include: The input module includes an input interface and a transformer; the input interface is connected to the mains power supply; the input terminal of the transformer is connected to the input interface, and the transformer converts the mains voltage into a lower AC voltage; the output terminal of the transformer is the output terminal of the input module. A rectifier module is used to convert alternating current (AC) to direct current (DC); the input terminal of the rectifier module is connected to the output terminal of the input module. The filter module is used to filter out high-frequency noise; the input of the filter module is connected to the output of the rectifier module. An adjustable voltage regulator module is included; its input is connected to the output of a filter module, and its output is connected to external electrical equipment. The control module has an input terminal connected to an external host computer to receive commands from the host computer; the output terminal of the control module is connected to the control terminal of the adjustable voltage regulator module to control the output voltage of the adjustable voltage regulator module. The adjustable voltage regulator module is a digital hardware module board developed based on an FPGA chip, which is used to improve communication speed; the control module is a circuit developed inside the FPGA chip.

2. The voltage-adjustable power supply according to claim 1, characterized in that, The control module includes an instruction parsing submodule and a target voltage-RP resistance value mapping submodule; The input terminal of the instruction parsing submodule is connected to the host computer, and the instruction parsing submodule is used to parse the instructions issued by the host computer; The input terminal of the target voltage-RP resistance value mapping submodule is connected to the output terminal of the instruction parsing submodule, and the output terminal of the target voltage-RP resistance value mapping submodule is connected to the control terminal of the adjustable voltage regulator module. The target voltage-RP resistance mapping submodule is used to convert the instructions parsed by the instruction parsing submodule into RP resistance values. The target voltage-RP resistance mapping submodule then sends the RP resistance values ​​to the control terminal of the adjustable voltage regulator module.

3. The voltage-adjustable power supply according to claim 1, characterized in that, The adjustable voltage regulator module includes capacitor C1, capacitor C2, resistors R1, R2, R3, R4, R5, electronic variable resistor RP, transistors V1, V2, and V3; transistor V2 is an NPN type transistor, and transistor V3 is a PNP type transistor. One end of capacitor C1 is connected to the input terminal of the adjustable voltage regulator module; the other end of capacitor C1 is grounded; capacitor C1 is also connected in parallel to the input terminal of the adjustable voltage regulator module; the positive terminal of the adjustable voltage regulator module's input is connected in series with resistor R1, electronic variable resistor RP, resistor R2, and resistor R3 and grounded; the input terminal of electronic variable resistor RP is connected to resistor R1, and the output terminal of electronic variable resistor RP is connected to resistor R2; the collector of transistor V1 is connected to the connection point between capacitor C1 and resistor R1; the base of transistor V1 is connected to the connection point between resistor R1 and the input terminal of electronic variable resistor RP; the control terminal and input terminal of electronic variable resistor RP are connected in parallel. Connected to the control module; the control terminal and input terminal of the electronic variable resistor RP are both control terminals of the adjustable voltage regulator module; the base of transistor V1 is connected in series with resistors R4 and R5 to the collector of transistor V2; the base of transistor V2 is connected to the connection point between resistors R2 and R3; the emitter of transistor V2 is grounded; the emitter of transistor V3 is connected to the base of transistor V1; the base of transistor V3 is connected to the connection point between resistors R4 and R5; the collector of transistor V3 is grounded; one end of capacitor C2 is connected to the emitter of transistor V1; the other end of capacitor C2 is grounded; simultaneously, capacitor C2 is connected in parallel to the output terminal of the adjustable voltage regulator module.

4. The voltage-adjustable power supply according to claim 3, characterized in that, The electronic variable resistor RP uses the AD5272 chip; the A terminal of the AD5272 chip is the input terminal of the electronic variable resistor RP; the W terminal of the AD5272 chip is the control terminal of the electronic variable resistor.

5. The voltage-adjustable power supply according to claim 3, characterized in that, The total resistance of the electronic variable resistor RP is more than 500 times the resistance of resistor R1.

6. The voltage-adjustable power supply according to any one of claims 2-5, characterized in that, The resistance values ​​of resistors R2, R3, R4, and R5 are all 49 to 51 times the resistance value of resistor R1.

7. A test stand, characterized in that, Includes the voltage-adjustable power supply as described in any one of claims 1-5.

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