CN216413927U

CN216413927U - Direct current commutation circuit

Info

Publication number: CN216413927U
Application number: CN202121659462.6U
Authority: CN
Inventors: 韩立江; 朱琳; 李毓; 史进
Original assignee: Shaanxi Electronic Information Group Photoelectric Technology Co ltd
Current assignee: Shaanxi Electronic Information Group Photoelectric Technology Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-04-29
Anticipated expiration: 2031-07-20

Abstract

The utility model discloses a direct current reversing circuit which comprises a direct current power supply, a forward current circuit, a reverse current circuit, a driving switching component and positive and negative current ends, wherein the direct current power supply respectively supplies power to the forward current circuit and the reverse current circuit, voltage is output by the positive and negative current ends, and the driving switching component is connected with the forward current circuit and the reverse current circuit in series and used for switching the forward current circuit and the reverse current circuit to work. The utility model can be applied to various scenes needing to switch the positive electrode and the negative electrode of the direct current power supply by arranging the driving switching component to switch the forward current circuit and the reverse current circuit, has the characteristics of simple circuit structure, low cost, small volume, manual control and convenient realization of micro control, can solve the problems that a mechanical reversing switch is large in volume, short in service life and incapable of realizing micro control and can also solve the problems that a relay reversing circuit is high in cost, large in volume and difficult to realize micro control when being applied to direct current power supply reversing.

Description

Direct current commutation circuit

Technical Field

The utility model relates to the technical field of a commutation circuit, in particular to a direct current commutation circuit.

Background

The existing reversing circuit realized by a mechanical reversing switch or a relay has the defects of large volume, short service life and incapability of realizing automatic control or automatic control of circuit load.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention is directed to a dc commutating circuit.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the embodiment of the utility model provides a direct current reversing circuit which comprises a direct current power supply, a forward current circuit, a reverse current circuit, a driving switching component and positive and negative current ends, wherein the direct current power supply respectively supplies power to the forward current circuit and the reverse current circuit, voltage is output by the positive and negative current ends, and the driving switching component is connected with the forward current circuit and the reverse current circuit in series and is used for switching the forward current circuit and the reverse current circuit to work so that the forward current circuit and the reverse current circuit output opposite positive and negative currents.

Preferably, the positive and negative current terminals include a first current output terminal OUT1 and a second current output terminal OUT2, the forward current circuit is connected to the first current output terminal OUT1, and the reverse current circuit is connected to the second current output terminal OUT 2.

Preferably, the forward current circuit includes a first fet Q1 and a second fet Q2, the first fet Q1 is connected to the positive terminal VCC of the dc power supply and the first current output terminal OUT1, respectively, and the second fet Q2 is connected to the negative terminal GND of the dc power supply and the second current output terminal OUT2, respectively.

Preferably, the reverse current circuit comprises a third fet Q3 and a fourth fet Q4, the third fet Q3 is connected to the positive terminal VCC of the dc power supply and the second current output terminal OUT2, respectively, and the fourth fet Q4 is connected to the negative terminal GND of the dc power supply and the first current output terminal OUT1, respectively.

Preferably, the driving switching component includes a high-low level end C and a trigger, and the trigger is connected in series with the high-low level end C and then connected in series with the forward current circuit and the reverse current circuit, respectively, and is configured to trigger the high-level or low-level of the high-low level end C to switch the forward current circuit or the reverse current circuit to be turned on.

Preferably, the trigger is a switch J1 or a microcontroller.

Preferably, the first fet Q1 and the second fet Q2 trigger the first transistor Q5 and the second transistor Q6 to operate when the high-low level terminal C is high level.

Preferably, when the high-low level end C of the third fet Q3 and the fourth fet Q4 is at a low level, the third triode Q8 cannot pull down the gate voltage of the fifth fet Q7, and the fifth fet Q7 drives the third fet Q3 and the fourth fet Q4 to operate.

Compared with the prior art, the direct current power supply reversing circuit has the advantages that the forward current circuit and the reverse current circuit are switched by arranging the driving switching assembly, the direct current power supply reversing circuit can be applied to various scenes needing to switch the positive electrode and the negative electrode of the direct current power supply, has the characteristics of simple circuit structure, low cost, small size, manual control and convenience in realizing micro control, can solve the problems that a mechanical reversing switch is large in size, short in service life and incapable of realizing micro control, and can also solve the problems that a relay reversing circuit is high in cost, large in size and difficult to realize micro control.

Drawings

Fig. 1 is a schematic structural diagram of a dc commutating circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1, an embodiment of the present invention provides a dc commutating circuit, which includes a dc power supply, a forward current circuit, a reverse current circuit, a driving switching module, and positive and negative current terminals, where the dc power supply supplies power to the forward current circuit and the reverse current circuit, respectively, and outputs voltage from the positive and negative current terminals, and the driving switching module is connected in series with the forward current circuit and the reverse current circuit and is configured to switch the forward current circuit and the reverse current circuit to operate, so that the forward current circuit and the reverse current circuit output opposite positive and negative currents.

As shown in fig. 1, the positive and negative current terminals include a first current output terminal OUT1 and a second current output terminal OUT2, the forward current circuit is connected to the first current output terminal OUT1, the reverse current circuit is connected to the second current output terminal OUT2, the forward current circuit current flow direction is from the first current output terminal OUT1 to the second current output terminal OUT2, and the reverse current circuit current flow direction is from the second current output terminal OUT2 to the first current output terminal OUT 1.

As shown in fig. 1, the forward current circuit includes a first fet Q1 and a second fet Q2, the first fet Q1 is connected to the positive electrode VCC of the dc power supply and the first current output terminal OUT1, respectively, and the second fet Q2 is connected to the negative electrode GND of the dc power supply and the second current output terminal OUT2, respectively.

As shown in fig. 1, the reverse current circuit includes a third fet Q3 and a fourth fet Q4, the third fet Q3 is connected to the positive electrode VCC of the dc power supply and the second current output terminal OUT2, respectively, and the fourth fet Q4 is connected to the negative electrode GND of the dc power supply and the first current output terminal OUT1, respectively.

As shown in fig. 1, the driving switching component includes a high-low level end C and a trigger, and the trigger is connected in series with the high-low level end C and then connected in series with the forward current circuit and the reverse current circuit, respectively, for triggering the high-level or low-level of the high-low level end C to switch on the forward current circuit or the reverse current circuit.

As shown in fig. 1, the trigger is a switch J1 or a microcontroller.

As shown in fig. 1, the first fet Q1 and the second fet Q2 trigger the operation of the first transistor Q5 and the second transistor Q6 when the high-low terminal C is high, respectively.

As shown in fig. 1, when the high-low level end C of the third fet Q3 and the fourth fet Q4 is at the low level, the third transistor Q8 cannot pull down the gate voltage of the fifth fet Q7, and the fifth fet Q7 drives the third fet Q3 and the fourth fet Q4 to operate.

Example 1:

as shown in FIG. 1, in a DC commutating circuit, a positive pole VCC of a DC power supply is respectively connected with a source of a first field effect transistor Q1, a first end of a first resistor R1, a first end of a second resistor R2, a source of a third field effect transistor Q3, a first end of a tenth resistor R10, a first end of a thirteenth resistor R13 and a first end of a switch J1, a drain of the first field effect transistor Q1 is respectively connected with drains of a first current output terminal OUT1 and a fourth field effect transistor Q4, a gate of the third field effect transistor Q3 is respectively connected with a second end of the tenth resistor R10 and a first end of the eleventh resistor R11, a drain of the third field effect transistor Q3 is respectively connected with drains of the second current output terminal OUT2 and the second field effect transistor Q2, a second end of the eleventh resistor R11 is connected with a drain of the fifth field effect transistor Q7, a second end of the thirteenth resistor R13 is connected in series with a fourteenth resistor R14 and then connected with a gate of the fifth field effect transistor Q7, The collector of the third triode Q8 is connected with the first end of the fifteenth resistor R15, the second end of the switch J1 is connected with the sixteenth resistor R16 and the seventeenth resistor R17 in series and then respectively connected with the high-low level end C, the first end of the eighteenth resistor R18, the first end of the eighth resistor R8 and the first end of the seventh resistor R7, the source of the fifth fet Q7 is connected with the first end of the ninth resistor R9 and the first end of the twelfth resistor R12, respectively, the second end of the ninth resistor R9 is connected with the gate of the fourth fet Q4, the gate of the second fet Q2 is connected with the sixth resistor R6 in series and then respectively connected with the collector of the first triode Q5 and the first end of the fifth resistor R365, the emitter of the first triode Q5 is connected with the second end of the fourth resistor R4, the base of the first triode Q5 is connected with the third resistor R3 in series and then respectively connected with the collector 5739 of the first resistor R1 and the second resistor Q6, the emitter of the second triode Q6 is respectively connected to the negative GND of the dc power supply, the second end of the fifth resistor R5, the source of the second fet Q2, the source of the fourth fet Q4, the second end of the twelfth resistor R12, the second end of the fifteenth resistor R15, the emitter of the third triode Q8, and the second end of the eighteenth resistor R18.

Example 2:

the trigger is a microcontroller, in embodiment 1, the microcontroller is connected at the high-low level end C, and the high level or the low level of the high-low level end C is controlled by the microcontroller to switch the forward current circuit and the reverse current circuit to operate.

The working principle of the utility model is as follows:

as shown in fig. 1, when the high-low level end C is at a high level, the first fet Q1 and the second fet Q2 are turned on, the third fet Q3 and the fourth fet Q4 are turned off, at this time, the voltage of the first current output terminal OUT1 approaches the voltage of the positive electrode VCC of the dc power supply, the voltage of the second current output terminal OUT2 approaches the negative electrode GND of the dc power supply, and when there is a load between the first current output terminal OUT1 and the second current output terminal OUT2, the current flows from the first current output terminal OUT1 to the second current output terminal OUT2, at this time, the voltage output from the first current output terminal OUT1 is at the positive electrode, and the voltage output from the second current output terminal OUT2 is at the negative electrode.

As shown in fig. 1, when the high-low level end C is at a low level, the third fet Q3 and the fourth fet Q4 are turned on, the first fet Q1 and the second fet Q2 are turned off, at this time, the voltage of the first current output terminal OUT1 approaches the negative GND of the dc power supply, the voltage of the second current output terminal OUT2 approaches the positive VCC of the dc power supply, and when there is a load between the first current output terminal OUT1 and the second current output terminal OUT2, the current flows from the second current output terminal OUT2 to the first current output terminal OUT1, at this time, the voltage output from the second current output terminal OUT2 is positive, and the voltage output from the first current output terminal OUT1 is negative.

In summary, the utility model can be applied to various scenes that the positive and negative poles of the direct current power supply need to be switched by arranging the driving switching component to switch the forward current circuit and the reverse current circuit, has the characteristics of simple circuit structure, low cost, small volume, manual control and convenience for realizing micro control, and can solve the problems that a mechanical reversing switch is large in volume, short in service life and incapable of realizing micro control and a relay reversing circuit is high in cost, large in volume and difficult to realize micro control when being applied to direct current power supply reversing.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, the terms describing the positional relationships in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A direct current reversing circuit is characterized by comprising a direct current power supply, a forward current circuit, a reverse current circuit, a driving switching component and positive and negative current ends, wherein the direct current power supply respectively supplies power to the forward current circuit and the reverse current circuit, voltage is output by the positive and negative current ends, and the driving switching component is connected with the forward current circuit and the reverse current circuit in series to enable the forward current circuit and the reverse current circuit to output opposite positive and negative currents.

2. A dc commutating circuit according to claim 1 wherein the positive and negative current terminals comprise a first current output terminal OUT1 and a second current output terminal OUT2, the forward current circuit being connected to the first current output terminal OUT1 and the reverse current circuit being connected to the second current output terminal OUT 2.

3. The DC commutating circuit of claim 2 wherein the forward current circuit comprises a first FET Q1 and a second FET Q2, the first FET Q1 is connected to the positive pole VCC of the DC power supply and the first current output terminal OUT1, respectively, and the second FET Q2 is connected to the negative pole GND of the DC power supply and the second current output terminal OUT2, respectively.

4. The DC commutating circuit of claim 3 wherein the reverse current circuit comprises a third FET Q3 and a fourth FET Q4, the third FET Q3 is connected to the positive pole VCC of the DC power supply and the second current output terminal OUT2, respectively, and the fourth FET Q4 is connected to the negative pole GND of the DC power supply and the first current output terminal OUT1, respectively.

5. The direct current commutation circuit of claim 4, wherein the driving switching component comprises a high-low level end C and a triggering component, the triggering component is connected in series with the high-low level end C and then connected in series with the forward current circuit and the reverse current circuit respectively, and is used for triggering the high-level or low-level switching of the high-low level end C to conduct the forward current circuit or the reverse current circuit.

6. A DC commutating circuit according to claim 5 wherein the trigger is a switch J1 or a microcontroller.

7. The DC commutating circuit of claim 6 wherein the first FET Q1 and the second FET Q2 trigger the operation of the first transistor Q5 and the second transistor Q6, respectively, when the high-low terminal C is high.

8. The DC commutating circuit of claim 7 wherein the third FET Q3 and the fourth FET Q4 disable the third FET Q8 from pulling down the gate voltage of the fifth FET Q7 when the high-low terminal C is low, and the fifth FET Q7 drives the third FET Q3 and the fourth FET Q4 to operate, respectively.