阅读说明：本技术 电流发生模组及可充电电流发生装置 (Current generating module and chargeable current generating device ) 是由 周歧林 王兴南 刘秦铭 孙沛瑶 伍尚显 陈申宇 王增煜 陈泽涛 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种电流发生模组及可充电电流发生装置,所述电流发生模组包括：振荡模块,用于根据直流电源提供的直流电压生成交流正弦电压；隔离模块,与所述振荡模块连接,用于保证电路正常工作并基于所述交流正弦电压生成可调节电压；恒流源模块,与所述隔离模块连接,用于将所述可调节电压转换为正弦电流；输出模块,与所述恒流源模块连接,用于将所述正弦电流放大后输出。可充电电流发生装置即使在没有低压电源的场合也可以正常工作,解决了继保仪依赖外界220V交流电源的不便,本装置体积小、重量轻,制作成本低且方便携带。(The invention discloses a current generation module and a chargeable current generation device, wherein the current generation module comprises: the oscillation module is used for generating alternating current sinusoidal voltage according to direct current voltage provided by a direct current power supply; the isolation module is connected with the oscillation module and used for ensuring the normal work of a circuit and generating adjustable voltage based on the alternating current sinusoidal voltage; the constant current source module is connected with the isolation module and used for converting the adjustable voltage into sinusoidal current; and the output module is connected with the constant current source module and is used for amplifying the sinusoidal current and then outputting the amplified sinusoidal current. The rechargeable current generating device can normally work even in the occasions without low-voltage power supplies, the inconvenience that the relay protection instrument depends on an external 220V alternating current power supply is solved, and the rechargeable current generating device is small in size, light in weight, low in manufacturing cost and convenient to carry.)

1. A current generating module, comprising:

the oscillation module is used for generating alternating current sinusoidal voltage according to direct current voltage provided by a direct current power supply;

the isolation module is connected with the oscillation module and used for ensuring the normal work of a circuit and generating adjustable voltage based on the alternating current sinusoidal voltage;

the constant current source module is connected with the isolation module and used for converting the adjustable voltage into sinusoidal current;

and the output module is connected with the constant current source module and is used for amplifying the sinusoidal current and then outputting the amplified sinusoidal current.

2. The current generating module according to claim 1, wherein the oscillating module comprises:

the output end of the first amplification unit is connected with the input end of the isolation module, the third end of the first amplification unit is connected with a positive direct-current power supply, and the fourth end of the first amplification unit is connected with a negative direct-current power supply;

a first end of the negative feedback branch is connected with the second input end of the first amplifying unit, a second end of the negative feedback branch is connected with the output end of the first amplifying unit, and a third end of the negative feedback branch is grounded;

a first end of the positive feedback branch is connected with a first input end of the first amplifying unit, a second end of the positive feedback branch is connected with an output end of the first amplifying unit, and a third end of the positive feedback branch is grounded;

and the first end of the amplitude stabilizing branch circuit is connected with the fourth end of the negative feedback branch circuit, and the second end of the amplitude stabilizing branch circuit is connected with the second end of the negative feedback branch circuit.

3. The current generating module according to claim 2,

the first amplifying unit comprises a first operational amplifier, the output end of the first operational amplifier is connected with the input end of the isolating module, the positive power end of the first operational amplifier is connected with a positive direct-current power supply, and the negative power end of the first operational amplifier is connected with a negative direct-current power supply;

the negative feedback branch comprises a resistor R1, a resistor R2 and a resistor R3, the resistor R2 is connected between the second end of the resistor R1 and the first end of the resistor R3 in series, the first end of the resistor R1 is grounded, the first end of the resistor R2 is connected with the inverting input end of the first operational amplifier, the second end of the resistor R2 is connected with the first end of the amplitude stabilizing branch, and the second end of the resistor R3 is connected with the second end of the amplitude stabilizing branch and the input end of the isolation module;

the positive feedback branch comprises a first capacitor, a resistor R4, a second capacitor and a resistor R5, wherein a first end of the resistor R4 is connected with an input end of the isolation module, a second end of the resistor R4 is connected with a first end of the first capacitor, a second end of the first capacitor is connected with a first end of the second capacitor, a first end of the resistor R5 and a non-inverting input end of the first operational amplifier, the second capacitor is connected with the resistor R5 in parallel, and a second end of the second capacitor is grounded;

the amplitude stabilizing branch circuit comprises a first diode and a second diode, the anode of the first diode is connected with the first end of the resistor R3 and the cathode of the second diode, and the cathode of the first diode is connected with the anode of the second diode and the second end of the resistor R3.

4. The current generating module according to claim 3, wherein said isolation module comprises:

the first end of the resistance adjusting unit is connected with the output end of the oscillation module, and the second end of the resistance adjusting unit is grounded;

the input end of the resistor R6 is connected with the third end of the resistance adjusting unit;

the first input end of the second amplifying unit is connected with the output end of the resistor R6, the second input end of the second amplifying unit is connected with the input end of the constant current source module, the third end of the second amplifying unit is connected with the positive direct current power supply, and the fourth end of the second amplifying unit is connected with the negative direct current power supply.

5. The current generating module according to claim 4,

the second amplifying unit comprises a second operational amplifier, the non-inverting input end of the second operational amplifier is connected with the output end of the resistor R6, the second input end of the second operational amplifier is connected with the input end of the constant current source module, the positive power supply end of the second operational amplifier is connected with the positive direct current power supply, and the negative power supply end of the second operational amplifier is connected with the negative direct current power supply.

6. The current generating module of claim 5, wherein the first operational amplifier and the second operational amplifier together form a dual operational amplifier.

7. The current generating module according to any one of claims 1 to 6, wherein the constant current source module comprises a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a third amplifying unit and a fourth amplifying unit, a first end of the resistor R7 is connected to the output end of the isolation module, a second end of the resistor R7 is connected to a first input end of the third amplifying unit, a second input end of the third amplifying unit is connected to a first end of the resistor R8 and a first end of the resistor R9, a third end of the third amplifying unit is connected to a negative DC power source, a fourth end of the third amplifying unit is connected to a positive DC power source, a second end of the resistor R8 is grounded, a second end of the resistor R9 is connected to an output end of the third amplifying unit and a first end of the resistor R10, and a first input end of the fourth amplifying unit is connected to a second end of the resistor R10, the second input end of the fourth amplifying unit is connected with the output end of the fourth amplifying unit and the first end of the resistor R11, the third end of the fourth amplifying unit is connected with the positive direct-current power supply, the fourth end of the fourth amplifying unit is connected with the negative direct-current power supply, and the second end of the R11 is connected with the first input end of the third amplifying unit.

8. The current generating module according to claim 7,

the third amplifying unit comprises a third operational amplifier, a non-inverting input end of the third operational amplifier is connected with the second end of the resistor R7, an inverting input end of the third operational amplifier is connected with the first end of the resistor R8 and the first end of the resistor R9, a positive power source end of the third operational amplifier is connected with a positive direct-current power supply, a negative power source end of the third operational amplifier is connected with a negative direct-current power supply, and an output end of the third operational amplifier is connected with the first end of the resistor R10;

the fourth amplifying unit comprises a fourth operational amplifier, the non-inverting input end of the fourth operational amplifier is connected with the second end of the resistor R10, the inverting input end of the fourth operational amplifier is connected with the output end of the fourth operational amplifier and the first end of the resistor R11, the positive power supply end of the fourth operational amplifier is connected with the positive direct current power supply, and the negative power supply end of the fourth operational amplifier is connected with the negative direct current power supply.

9. A rechargeable current generating device, comprising:

a current generating module according to any one of claims 1 to 8;

the power supply module is connected with the current generation module and used for converting the stored alternating current into the direct current power supply so as to drive the current generation module;

the operation panel is connected with the current generation module and used for adjusting the value of the sinusoidal current and displaying the numerical value of the sinusoidal current; and

the control module, with module, power supply module and operating panel all connect are taken place to the electric current, are used for gathering the size of the value of the sinusoidal current that the module generated takes place to the electric current, and stabilize sinusoidal current.

10. The rechargeable current generating device according to claim 9, wherein the operation panel comprises an adjustment knob, a current output port, a battery voltage display and a current output display;

the adjusting knob is connected with the isolation module, the current output port is connected with the output module, and the battery voltage display and the current output display are connected with the current generation module through the control module.

Technical Field

The invention relates to the technical field of electric power, in particular to a current generation module and a chargeable current generation device.

Background

Distribution automation is comprehensively built in each province and city power grid, and the quantity is huge. In order to ensure normal operation of a Data Transfer Unit (DTU), and accurately locate a fault point, high requirements are provided for the DTU installation, debugging, operation and maintenance work. However, a proper tool for DTU debugging and operation and maintenance is not available at present, and a single-sequential protection instrument or a three-phase sequential protection instrument is mostly applied in practice.

However, the conventional relay protection instrument has the following problems: 1. the single-successive protection instrument or the three-phase successive protection instrument can only be used in an environment with 220V alternating current power supply, and when the instrument is installed and debugged on site, the situations that an electric room is not completely built and low voltage electricity is not generated often exist, and the problem can be solved only by additionally providing a power supply point; 2. the single-sequential protection instrument or the three-phase sequential protection instrument generally has the defects of overlarge volume and overweight equipment, is difficult to carry in the operation and maintenance process, and is inconvenient to use in box-type switch rooms with small space.

Disclosure of Invention

Accordingly, there is a need to provide a current generating module and a rechargeable current generating device with simple circuit structure, low cost and small size, which can be used normally in situations without low voltage power supply.

In order to solve the above technical problem, a first aspect of the present application provides a current generation module, including:

the oscillation module is used for generating alternating current sinusoidal voltage according to direct current voltage provided by a direct current power supply;

the isolation module is connected with the oscillation module and used for ensuring the normal work of a circuit and generating adjustable voltage based on the alternating current sinusoidal voltage;

the constant current source module is connected with the isolation module and used for converting the adjustable voltage into sinusoidal current;

and the output module is connected with the constant current source module and is used for amplifying the sinusoidal current and then outputting the amplified sinusoidal current.

In the current generating module in the above embodiment, by providing the oscillation module, the isolation module, the constant current source module, and the output module that are connected to each other, the direct current voltage in the direct current power supply is generated into the alternating current sinusoidal voltage by the oscillation module, the isolation module isolates the previous-stage circuit from the subsequent-stage circuit to ensure the normal operation of the circuits, and generates the adjustable voltage based on the alternating current sinusoidal voltage, and the constant current source module converts the adjustable voltage into the sinusoidal current and finally amplifies the sinusoidal current by the output module for output.

In one embodiment, the oscillation module includes:

the output end of the first amplification unit is connected with the input end of the isolation module, the third end of the first amplification unit is connected with a positive direct-current power supply, and the fourth end of the first amplification unit is connected with a negative direct-current power supply;

a first end of the negative feedback branch is connected with the second input end of the first amplifying unit, a second end of the negative feedback branch is connected with the output end of the first amplifying unit, and a third end of the negative feedback branch is grounded;

a first end of the positive feedback branch is connected with a first input end of the first amplifying unit, a second end of the positive feedback branch is connected with an output end of the first amplifying unit, and a third end of the positive feedback branch is grounded;

and the first end of the amplitude stabilizing branch circuit is connected with the fourth end of the negative feedback branch circuit, and the second end of the amplitude stabilizing branch circuit is connected with the second end of the negative feedback branch circuit.

In one embodiment, the first amplifying unit comprises a first operational amplifier, an output end of the first operational amplifier is connected with an input end of the isolation module, a positive power end of the first operational amplifier is connected with a positive direct current power supply, and a negative power end of the first operational amplifier is connected with a negative direct current power supply;

the negative feedback branch comprises a resistor R1, a resistor R2 and a resistor R3, the resistor R2 is connected between the second end of the resistor R1 and the first end of the resistor R3 in series, the first end of the resistor R1 is grounded, the first end of the resistor R2 is connected with the inverting input end of the first operational amplifier, the second end of the resistor R2 is connected with the first end of the amplitude stabilizing branch, and the second end of the resistor R3 is connected with the second end of the amplitude stabilizing branch and the input end of the isolation module;

the positive feedback branch comprises a first capacitor, a resistor R4, a second capacitor and a resistor R5, wherein a first end of the resistor R4 is connected with an input end of the isolation module, a second end of the resistor R4 is connected with a first end of the first capacitor, a second end of the first capacitor is connected with a first end of the second capacitor, a first end of the resistor R5 and a non-inverting input end of the first operational amplifier, the second capacitor is connected with the resistor R5 in parallel, and a second end of the second capacitor is grounded;

the amplitude stabilizing branch circuit comprises a first diode and a second diode, the anode of the first diode is connected with the first end of the resistor R3 and the cathode of the second diode, and the cathode of the first diode is connected with the anode of the second diode and the second end of the resistor R3.

In one embodiment, the isolation module comprises:

the first end of the resistance adjusting unit is connected with the output end of the oscillation module, and the second end of the resistance adjusting unit is grounded;

the input end of the resistor R6 is connected with the third end of the resistance adjusting unit;

the first input end of the second amplifying unit is connected with the output end of the resistor R6, the second input end of the second amplifying unit is connected with the input end of the constant current source module, the third end of the second amplifying unit is connected with the positive direct current power supply, and the fourth end of the second amplifying unit is connected with the negative direct current power supply.

In one embodiment, the second amplifying unit includes a second operational amplifier, a non-inverting input terminal of the second operational amplifier is connected to the output terminal of the resistor R6, a second input terminal of the second operational amplifier is connected to the input terminal of the constant current source module, a positive power terminal of the second operational amplifier is connected to the positive dc power supply, and a negative power terminal of the second operational amplifier is connected to the negative dc power supply.

In one embodiment, the first operational amplifier and the second operational amplifier together form a dual operational amplifier.

In one embodiment, the constant current source module includes a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R1, a third amplifying unit and a fourth amplifying unit, a first end of the resistor R7 is connected to the output end of the isolation module, a second end of the resistor R7 is connected to a first input end of the third amplifying unit, a second input end of the third amplifying unit is connected to the first end of the resistor R8 and the first end of the resistor R9, a third end of the third amplifying unit is connected to a negative dc power supply, a fourth end of the third amplifying unit is connected to a positive dc power supply, a second end of the resistor R8 is grounded, a second end of the resistor R9 is connected to the output end of the third amplifying unit and the first end of the resistor R10, and a first input end of the fourth amplifying unit is connected to the second end of the resistor R10, the second input end of the fourth amplifying unit is connected with the output end of the fourth amplifying unit and the first end of the resistor R11, the third end of the fourth amplifying unit is connected with the positive direct-current power supply, the fourth end of the fourth amplifying unit is connected with the negative direct-current power supply, and the second end of the R11 is connected with the first input end of the third amplifying unit.

In one embodiment, the third amplifying unit includes a third operational amplifier, a non-inverting input terminal of the third operational amplifier is connected to the second terminal of the resistor R7, an inverting input terminal of the third operational amplifier is connected to the first terminal of the resistor R8 and the first terminal of the resistor R9, a positive power terminal of the third operational amplifier is connected to a positive dc power supply, a negative power terminal of the third operational amplifier is connected to a negative dc power supply, and an output terminal of the third operational amplifier is connected to the first terminal of the resistor R10;

the fourth amplifying unit comprises a fourth operational amplifier, the non-inverting input end of the fourth operational amplifier is connected with the second end of the resistor R10, the inverting input end of the fourth operational amplifier is connected with the output end of the fourth operational amplifier and the first end of the resistor R11, the positive power supply end of the fourth operational amplifier is connected with the positive direct current power supply, and the negative power supply end of the fourth operational amplifier is connected with the negative direct current power supply.

A second aspect of the present application provides a chargeable current generating apparatus, comprising:

the current generation module is described above;

the power supply module is connected with the current generation module and used for converting the stored alternating current into the direct current power supply so as to drive the current generation module;

the operation panel is connected with the current generation module and used for adjusting the value of the sinusoidal current and displaying the numerical value of the sinusoidal current; and

the control module, with module, power supply module and operating panel all connect are taken place to the electric current, are used for gathering the size of the value of the sinusoidal current that the module generated takes place to the electric current, and stabilize sinusoidal current.

In one embodiment, the operation panel comprises an adjusting knob, a current output port, a battery voltage display and a current output display;

the adjusting knob is connected with the isolation module, the current output port is connected with the output module, and the battery voltage display and the current output display are connected with the current generation module through the control module.

In the rechargeable current generating device in the above embodiment, by setting the power supply module, the operation panel and the control module, the power supply module provides a dc power supply for the current generating module, and the operation panel is provided with the current output display and the voltage output display, so that the adjusting knob can accurately adjust the output value of the sinusoidal current, and the control module acquires the magnitude of the sinusoidal current and simultaneously stabilizes the amplitude and/or the frequency of the output sinusoidal current. This device adopts the battery power supply, and the accessible exchanges and directly the charger charges for the battery, and above-mentioned each module is integrated inside the device, even can normally work in the occasion that does not have low voltage power supply, has solved and has successively protected the inconvenience that the appearance relies on external 220V alternating current power supply, and this device is small, light in weight, and the cost of manufacture is low and conveniently carries.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.

Fig. 1 is a schematic circuit diagram of a current generating module according to a first embodiment of the present disclosure;

fig. 2 is a schematic circuit diagram of a current generating module according to a second embodiment of the present disclosure;

fig. 3 is a schematic circuit diagram of a current generating module according to a third embodiment of the present application;

fig. 4 is a schematic circuit diagram of a current generating module according to a fourth embodiment of the present disclosure;

fig. 5 is a schematic circuit diagram of a current generating module according to a fifth embodiment of the present application;

fig. 6 is a schematic circuit diagram of a current generating module according to a sixth embodiment of the present application;

fig. 7 is a schematic circuit diagram of a current generating module according to a seventh embodiment of the present disclosure;

fig. 8 is a schematic circuit diagram of a rechargeable current generating device according to an embodiment of the present disclosure;

fig. 9 is a schematic circuit diagram of a rechargeable current generating device according to another embodiment of the present disclosure.

Description of reference numerals: 100-a current generation module, 10-an oscillation module, 20-an isolation module, 30-a constant current source module, 40-an output module, 11-a first amplification unit, 12-a negative feedback branch, 13-a positive feedback branch, 14-an amplitude stabilizing branch, 21-a resistance regulation unit, 22-a second amplification unit, 31-a third amplification unit, 32-a fourth amplification unit, 200-a power supply module, 300-an operation panel and 400-a control module.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.

In this application, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are used broadly and encompass, for example, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to explain the technical solution of the present application, the following description will be given by way of specific examples.

In a current generation module provided in an embodiment of the present application, as shown in fig. 1, a current generation module 100 includes an oscillation module 10, an isolation module 20, a constant current source module 30, and an output module 40. The oscillation module 10 is configured to generate an ac sinusoidal voltage according to a dc voltage provided by a dc power supply; the isolation module 20 is connected with the oscillation module 10 and used for ensuring the normal work of the circuit and generating adjustable voltage based on alternating current sinusoidal voltage; the constant current source module 30 is connected with the isolation module 20 and is used for converting the adjustable voltage into a sinusoidal current; and the output module 40 is connected with the constant current source module 30 and is used for amplifying and outputting the sine current.

In the current generating module in the above embodiment, by providing the oscillation module, the isolation module, the constant current source module, and the output module that are connected to each other, the direct current voltage in the direct current power supply is generated into the alternating current sinusoidal voltage by the oscillation module, the isolation module isolates the previous-stage circuit from the subsequent-stage circuit to ensure the normal operation of the circuits, and generates the adjustable voltage based on the alternating current sinusoidal voltage, the constant current source module converts the adjustable voltage into the sinusoidal current, and finally the sinusoidal current is amplified by the output module and then output.

In an embodiment of the present application, as shown in fig. 2, an oscillating module 10 includes a first amplifying unit 11, a negative feedback branch 12, a positive feedback branch 13, and an amplitude stabilizing branch 14. The output end of the first amplifying unit 11 is connected with the input end of the isolating module 20, the third end of the first amplifying unit 11 is connected with a positive direct-current power supply DC +, and the fourth end of the first amplifying unit 11 is connected with a negative direct-current power supply DC-; a first end of the negative feedback branch 12 is connected with a second input end of the first amplifying unit 11, a second end of the negative feedback branch 12 is connected with an output end of the first amplifying unit 11, and a third end of the negative feedback branch 12 is grounded; a first end of the positive feedback branch 13 is connected with a first input end of the first amplifying unit 11, a second end of the positive feedback branch 13 is connected with an output end of the first amplifying unit 11, and a third end of the positive feedback branch 13 is grounded; the first end of the amplitude stabilizing branch 14 is connected with the fourth end of the negative feedback branch 12, and the second end of the amplitude stabilizing branch 14 is connected with the second end of the negative feedback branch 12. The oscillating circuit can also be called as a Venturi bridge RC oscillating circuit, wherein the positive feedback branch is used for determining the oscillating frequency of the current generating module, the amplitude of the generated sinusoidal voltage is stabilized by the amplitude stabilizing branch, and the positive and negative semi-cycle symmetry of the waveform of the output sinusoidal voltage is ensured.

In an embodiment of the present application, as shown in fig. 3, the first amplifying unit 11 includes a first operational amplifier, an output terminal of the first operational amplifier is connected to an input terminal of the isolation module 20, a positive power terminal of the first operational amplifier is connected to the positive DC power supply DC +, and a negative power terminal of the first operational amplifier is connected to the negative DC power supply DC-.

In an embodiment, referring to fig. 3, the negative feedback branch 12 includes a resistor R1, a resistor R2 and a resistor R3, the resistor R2 is connected in series between the second end of the resistor R1 and the first end of the resistor R3, the first end of the resistor R1 is grounded, the first end of the resistor R2 is connected to the inverting input terminal of the first operational amplifier, the second end of the resistor R2 is connected to the first end of the amplitude stabilizing branch 14, and the second end of the resistor R3 is connected to both the second end of the amplitude stabilizing branch 14 and the input terminal of the isolation module 20. Wherein, the resistor R3 is used for eliminating the nonlinear influence of the first diode and the second diode in the amplitude stabilizing branch.

In an embodiment, referring to fig. 3, the positive feedback branch 13 includes a first capacitor C1, a resistor R4, a second capacitor C2 and a resistor R5, a first end of the resistor R4 is connected to the input terminal of the isolation module 20, a second end of the resistor R4 is connected to a first end of the first capacitor C1, a second end of the first capacitor C1 is connected to a first end of the second capacitor C2, a first end of the resistor R5 and a non-inverting input terminal of the first operational amplifier, the second capacitor C2 is connected to the resistor R5 in parallel, and a second end of the second capacitor C2 is grounded.

In one embodiment, with continued reference to fig. 3, the amplitude stabilizing branch 14 includes a first diode D1 and a second diode D2, wherein the anode of the first diode D1 is connected to the first terminal of the resistor R3 and the cathode of the second diode D2, and the cathode of the first diode D1 is connected to the anode of the second diode D2 and the second terminal of the resistor R3.

Preferably, the first diode and the second diode are 1N4148 high-frequency switching diodes, so that the price is low, and the temperature stability requirement is met.

In an embodiment of the present application, in a current generating module, as shown in fig. 4, an isolation module 20 includes a resistance adjusting unit 21, a resistor R6, and a second amplifying unit 22. A first end of the resistance adjusting unit 21 is connected with an output end of the oscillation module 10, and a second end of the resistance adjusting unit 21 is grounded; the input end of the resistor R6 is connected with the third end of the resistance adjusting unit 21; a first input end of the second amplifying unit 22 is connected to an output end of the resistor R6, a second input end of the second amplifying unit 22 is connected to an input end of the constant current source module 30, a third end of the second amplifying unit 22 is connected to the positive direct current power source DC +, and a fourth end of the second amplifying unit 22 is connected to the negative direct current power source DC +.

In one embodiment, the resistance adjusting unit includes, but is not limited to, a sliding rheostat, an adjusting resistor box, and the like.

In an embodiment of the present application, as shown in fig. 5, the second amplifying unit 22 includes a second operational amplifier, a non-inverting input terminal of the second operational amplifier is connected to the output terminal of the resistor R6, a second input terminal of the second operational amplifier is connected to the input terminal of the constant current source module 30, a positive power terminal of the second operational amplifier is connected to the positive DC power source DC +, and a negative power terminal of the second operational amplifier is connected to the negative DC power source DC-.

Specifically, the first operational amplifier and the second operational amplifier together form a double operational amplifier, and the first operational amplifier and the second operational amplifier share one LM358DR2G double operational amplifier.

In an embodiment of the present application, as shown in fig. 6, the constant current source module 30 includes a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R1, a third amplifying unit 31 and a fourth amplifying unit 32, a first end of the resistor R7 is connected to the output end of the isolation module 20, a second end of the resistor R7 is connected to a first input end of the third amplifying unit 31, a second input end of the third amplifying unit 31 is connected to a first end of the resistor R8 and a first end of the resistor R9, a third end of the third amplifying unit 31 is connected to a negative direct current power DC-, a fourth end of the third amplifying unit 31 is connected to a positive direct current power DC +, a second end of the resistor R8 is grounded, a second end of the resistor R9 is connected to an output end of the third amplifying unit 31 and a first end of the resistor R10, a first input end of the fourth amplifying unit 32 is connected to a second end of the resistor R10, a second input end of the fourth amplifying unit 32 is connected to both the output end of the fourth amplifying unit 32 and the first end of the resistor R11, a third end of the fourth amplifying unit 32 is connected to the positive direct-current power supply DC +, a fourth end of the fourth amplifying unit 32 is connected to the negative direct-current power supply DC-, and a second end of the R11 is connected to the first input end of the third amplifying unit 31.

In a current generating module provided in an embodiment of the present application, as shown in fig. 7, the third amplifying unit 31 includes a third operational amplifier, a non-inverting input terminal of the third operational amplifier is connected to the second terminal of the resistor R7, an inverting input terminal of the third operational amplifier is connected to the first terminal of the resistor R8 and the first terminal of the resistor R9, a positive power source terminal of the third operational amplifier is connected to the positive direct current power source DC +, a negative power source terminal of the third operational amplifier is connected to the negative direct current power source DC-, and an output terminal of the third operational amplifier is connected to the first terminal of the resistor R10; the fourth amplifying unit 32 comprises a fourth operational amplifier, a non-inverting input terminal of the fourth operational amplifier is connected to the second terminal of the resistor R10, an inverting input terminal of the fourth operational amplifier is connected to an output terminal of the fourth operational amplifier and the first terminal of the resistor R11, a positive power source terminal of the fourth operational amplifier is connected to the positive direct current power source DC +, and a negative power source terminal of the fourth operational amplifier is connected to the negative direct current power source DC-.

As an example, like the first and second operational amplifiers described above, the third and fourth operational amplifiers are formed as two single LM358DR2G dual operational amplifiers.

In one embodiment, with continued reference to fig. 7, the output module 40 may include, but is not limited to, a transformer T1, which may amplify the sinusoidal current output by the constant current source module.

In an embodiment of the present application, as shown in fig. 8, a rechargeable current generating apparatus includes a current generating module 100, a power supply module 200, an operation panel 300, and a control module 400. A power supply module 200 connected to the current generation module 100 for converting the stored ac power into a dc power to drive the current generation module; an operation panel 300 connected to the current generation module 100 for adjusting the magnitude of the sinusoidal current and displaying the value thereof; and a control module 400 connected to the current generation module 100, the power supply module 200, and the operation panel 300, for acquiring the value of the sinusoidal current generated by the current generation module and stabilizing the sinusoidal current.

As an example, the control module may also be used to adjust the timing of the dual operational amplifiers.

In a rechargeable current generating device provided in an embodiment of the present application, as shown in fig. 8, an operation panel 300 includes an adjustment knob, a current output port, a battery voltage display, and a current output display; the adjusting knob is connected to the isolation module 20, the current output port is connected to the output module 40, and the battery voltage display and the current output display are connected to the current generation module 100 via the control module 400.

In one embodiment, with continued reference to fig. 9, the control module includes, but is not limited to, a single chip, a control chip, and the like. Preferentially, selecting a single chip microcomputer as a control module; the power supply module 200 includes an alternating direct charger and a storage battery. The storage battery is used for storing electricity and supplying direct current power to each operational amplifier and the single chip microcomputer in the current generation module.

Specifically, the adjusting knob is connected with a resistance adjusting unit in the current generating module, and a worker can control the resistance value of the resistance adjusting unit through manually adjusting the knob, so that the magnitude values of the output sinusoidal voltage and the output sinusoidal current are adjusted; the single chip microcomputer is connected with the double operational amplifiers in the current generation module to acquire the value of the sinusoidal voltage amplified and output by the operational amplifiers, so that the value is displayed on the operation panel.

In the rechargeable current generating device in the above embodiment, by setting the power supply module, the operation panel and the control module, the power supply module provides a dc power supply for the current generating module, and the operation panel is provided with the current output display and the voltage output display, so that the adjusting knob can accurately adjust the output value of the sinusoidal current, and the control module acquires the magnitude of the sinusoidal current and simultaneously stabilizes the amplitude and/or the frequency of the output sinusoidal current. This device adopts the battery power supply, and the accessible exchanges and directly the charger charges for the battery, and above-mentioned each module is integrated inside the device, even can normally work in the occasion that does not have low voltage power supply, has solved and has successively protected the inconvenience that the appearance relies on external 220V alternating current power supply, and this device is small, light in weight, and the cost of manufacture is low and conveniently carries.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.