Polarity adaptive circuit and electronic device

Abstract

The utility model discloses a kind of polarity adaptive circuit and electronic equipment.Polarity adaptive circuit includes: first transmission module and second transmission module;The first input end and the first control end of first transmission module are connected with the first end of direct current power supply, the second input end and the second control end of first transmission module are connected with the second end of direct current power supply, the first output end of first transmission module is connected with the positive pole of load, the second output end of first transmission module is connected with the negative pole of load;The first input end and the first control end of second transmission module are connected with the second end of direct current power supply, the second input end and the second control end of second transmission module are connected with the first end of direct current power supply, the first output end of second transmission module is connected with the positive pole of load, the second output end of second transmission module is connected with the negative pole of load.

Description

Technical Field

[0001] This utility model relates to the field of DC power supply technology, and in particular to polarity adaptive circuits and electronic devices. Background Technology

[0002] DC current has a clear direction (flowing from the positive to the negative terminal), and polarity markings are used to visually distinguish the positive and negative terminals of a DC power supply. However, in traditional DC power supply scenarios, polarity markings suffer from insufficient durability, easily fading and wearing off after prolonged use. Furthermore, different device interfaces may have different markings for positive and negative terminals, leading to misjudgments and incorrect polarity insertions, potentially causing equipment damage. Utility Model Content

[0003] The main purpose of this invention is to provide a polarity adaptive circuit and electronic device, which aims to solve the technical problem of reverse polarity insertion in the interface of DC power supply devices in the prior art.

[0004] To achieve the above objectives, this utility model proposes a polarity adaptive circuit, comprising:

[0005] First transmission module and second transmission module;

[0006] The first input terminal and the first control terminal of the first transmission module are connected to the first terminal of the DC power supply, the second input terminal and the second control terminal of the first transmission module are connected to the second terminal of the DC power supply, the first output terminal of the first transmission module is connected to the positive terminal of the load, and the second output terminal of the first transmission module is connected to the negative terminal of the load.

[0007] The first input terminal and the first control terminal of the second transmission module are connected to the second terminal of the DC power supply. The second input terminal and the second control terminal of the second transmission module are connected to the first terminal of the DC power supply. The first output terminal of the second transmission module is connected to the positive terminal of the load. The second output terminal of the second transmission module is connected to the negative terminal of the load.

[0008] The first transmission module is used to transmit the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load when it receives a high-level signal from the first terminal of the DC power supply and a low-level signal from the second terminal of the DC power supply.

[0009] The second transmission module is used to transmit the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load when it receives a low-level signal from the first terminal of the DC power supply and a high-level signal from the second terminal of the DC power supply.

[0010] In addition, to achieve the above objectives, this utility model also proposes an electronic device, which includes the polarity adaptive circuit described above. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the first embodiment of the polarity adaptive circuit of this utility model;

[0014] Figure 2 A schematic diagram of the module provided for the second embodiment of the polarity adaptive circuit of this utility model;

[0015] Figure 3 A circuit connection diagram provided for the second embodiment of the polarity adaptive circuit of this utility model;

[0016] Figure 4 A circuit connection diagram provided for the third embodiment of the polarity adaptive circuit of this utility model;

[0017] Figure 5 This is a circuit connection diagram provided for an embodiment of the electronic device of this utility model.

[0018] Explanation of reference numerals in the attached diagram: R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; Q1, first PMOS transistor; Q2, first NMOS transistor; Q3, second PMOS transistor; Q4, second NMOS transistor; 10, first transmission module; 20, second transmission module; 30, output detection module; 101, forward high-voltage transmission unit; 102, forward low-voltage transmission unit; 201, reverse high-voltage transmission unit; 202, reverse low-voltage transmission unit; TP1, first terminal of DC power supply; TP2, second terminal of DC power supply; OP1, positive terminal of load; OP2, negative terminal of load.

[0019] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] Based on this, this utility model embodiment provides a polarity adaptive circuit, referring to... Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the polarity adaptive circuit of this utility model.

[0025] In this embodiment, the polarity adaptive circuit includes: a first transmission module 10 and a second transmission module 20.

[0026] The first input terminal and the first control terminal of the first transmission module 10 are connected to the first terminal TP1 of the DC power supply, the second input terminal and the second control terminal of the first transmission module 10 are connected to the second terminal TP2 of the DC power supply, the first output terminal of the first transmission module 10 is connected to the positive terminal OP1 of the load, and the second output terminal of the first transmission module 10 is connected to the negative terminal OP2 of the load.

[0027] It should be noted that the first transmission module 10 can be used to transmit the high-level signal to the positive terminal OP1 of the load and the low-level signal to the negative terminal OP2 of the load when it receives a high-level signal from the first terminal TP1 of the DC power supply and a low-level signal from the second terminal TP2 of the DC power supply.

[0028] Furthermore, the first input terminal and the first control terminal of the second transmission module are connected to the second terminal of the DC power supply, the second input terminal and the second control terminal of the second transmission module are connected to the first terminal of the DC power supply, the first output terminal of the second transmission module is connected to the positive terminal of the load, and the second output terminal of the second transmission module is connected to the negative terminal of the load.

[0029] It should be noted that the second transmission module 20 can be used to transmit the high-level signal to the positive terminal OP1 of the load and the low-level signal to the negative terminal OP2 of the load when it receives a low-level signal from the first terminal TP1 of the DC power supply and a high-level signal from the second terminal TP2 of the DC power supply.

[0030] It should be understood that, due to the possibility of reverse polarity of the DC power supply, the first terminal TP1 of the DC power supply may be connected to the positive terminal, i.e., receiving a high-level signal (5-400V), or it may be connected to the negative terminal, i.e., receiving a low-level signal (0V). Similarly, the second terminal TP2 of the DC power supply may also receive either a high-level signal or a low-level signal. The first transmission module 10 and the second transmission module 20 can be functional devices with signal sampling and detection capabilities and capable of transmitting electrical signals, such as: field-effect transistors, relays, diode rectifier bridges, or operational amplifiers forming a detection circuit. Among them, the electromagnetic relay can perform contact switching based on the received electrical signal to achieve polarity correction; the diode rectifier bridge utilizes the unidirectional conduction characteristic of diodes to achieve polarity correction; the operational amplifier can form a comparator with voltage divider resistors to perform input detection and achieve polarity correction.

[0031] Furthermore, the first transmission module 10 and the second transmission module 20 simultaneously acquire electrical signals input from the first and second terminals of the DC power supply. When the first terminal is a high-level signal and the second terminal is a low-level signal, the first transmission module 10 transmits the electrical signals, sending the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load. At this time, the second transmission module 20 does not transmit any electrical signals. When the second terminal of the DC power supply is a high-level signal and the first terminal is a low-level signal, the second transmission module 20 transmits the electrical signals, sending the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load. At this time, the first transmission module 10 does not transmit any electrical signals.

[0032] This embodiment provides a polarity adaptive circuit, comprising a first transmission module and a second transmission module. When the first transmission module receives a high-level signal from the first terminal of a DC power supply and a low-level signal from the second terminal, it transmits the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load. Similarly, when the second transmission module receives a low-level signal from the first terminal of the DC power supply and a high-level signal from the second terminal, it transmits the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load. Regardless of whether the polarity of the DC power supply input is reversed, a corresponding voltage state can be generated on the load, ensuring stable load operation.

[0033] Based on the first embodiment of this utility model, in the second embodiment of this utility model, the contents that are the same as or similar to those in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a schematic diagram of a module provided for a second embodiment of the polarity adaptive circuit of this utility model.

[0034] In this embodiment, the first transmission module 10 includes a positive high-voltage transmission unit 101 and a positive low-voltage transmission unit 102. The input terminal of the positive high-voltage transmission unit 101 is connected to the first terminal TP1 of the DC power supply, the control terminal of the positive high-voltage transmission unit 101 is connected to the second terminal TP2 of the DC power supply, and the output terminal of the positive high-voltage transmission unit 101 is connected to the positive terminal OP1 of the load. The input terminal of the positive low-voltage transmission unit 102 is connected to the second terminal TP2 of the DC power supply, the control terminal of the positive low-voltage transmission unit 102 is connected to the first terminal TP1 of the DC power supply, and the output terminal of the positive low-voltage transmission unit 102 is connected to the negative terminal OP2 of the load.

[0035] It should be noted that the first transmission module 10 is a functional module that transmits electrical signals to the load when the DC power supply is connected in the positive polarity. Specifically, the positive high-voltage transmission unit 101 can be used to transmit the high-level signal received at the input terminal to the positive terminal OP1 of the load when a low-level signal is received at the control terminal. The positive low-voltage transmission unit 102 can be used to transmit the low-level signal received at the input terminal to the negative terminal OP2 of the load when a high-level signal is received at the control terminal.

[0036] Further, the second transmission module 20 includes a reverse high-voltage transmission unit 201 and a reverse low-voltage transmission unit 202. The input terminal of the reverse high-voltage transmission unit 201 is connected to the second terminal TP2 of the DC power supply, the control terminal of the reverse high-voltage transmission unit 201 is connected to the first terminal TP1 of the DC power supply, and the output terminal of the reverse high-voltage transmission unit 201 is connected to the positive terminal OP1 of the load. The input terminal of the reverse low-voltage transmission unit 202 is connected to the first terminal TP1 of the DC power supply, the control terminal of the reverse low-voltage transmission unit 202 is connected to the second terminal TP2 of the DC power supply, and the output terminal of the reverse low-voltage transmission unit 202 is connected to the negative terminal OP2 of the load.

[0037] It should be noted that the second transmission module 20 is a functional module that transmits electrical signals to the load when the DC power supply is connected in reverse polarity. Specifically, the reverse high-voltage transmission unit 201 can be used to transmit the high-level signal received at the input terminal to the positive terminal OP1 of the load when a low-level signal is received at the control terminal. The reverse low-voltage transmission unit 202 can be used to transmit the low-level signal received at the input terminal to the negative terminal OP2 of the load when a high-level signal is received at the control terminal.

[0038] Reference Figure 3 , Figure 3 This is a circuit connection diagram provided for a second embodiment of the polarity adaptive circuit of this utility model. The forward high voltage transmission unit 101 includes: a first PMOS transistor Q1 and a first resistor R1; the drain of the first PMOS transistor Q1 is connected to the first terminal TP1 of the DC power supply, the gate of the first PMOS transistor is connected to the second terminal TP2 of the DC power supply and the first terminal of the first resistor R1, and the source of the first PMOS transistor Q1 is connected to the positive terminal OP1 of the load and the second terminal of the first resistor R1.

[0039] It should be understood that a PMOS transistor conducts when the gate voltage is lower than the source voltage, and a PNP transistor can also be used instead. Therefore, the first PMOS transistor Q1 conducts when TP1 is a high-level signal and TP2 is a low-level signal, and is cut off when TP1 is a low-level signal and TP2 is a high-level signal, transmitting the high-level signal to the positive terminal of the load.

[0040] Furthermore, the forward low-voltage transmission unit 102 includes a first NMOS transistor Q2. The drain of the first NMOS transistor Q2 is connected to the second terminal TP2 of the DC power supply, the gate of the first NMOS transistor Q2 is connected to the first terminal TP1 of the DC power supply, and the source of the first NMOS transistor Q2 is connected to the negative terminal OP2 of the load.

[0041] It should be understood that an NMOS transistor conducts when the gate voltage is higher than the source voltage, and an NPN transistor can also be used instead. Therefore, the first NMOS transistor Q2 conducts when TP1 is a high-level signal and TP2 is a low-level signal, and is cut off when TP1 is a low-level signal and TP2 is a high-level signal, transmitting the low-level signal to the negative terminal of the load.

[0042] Furthermore, the reverse high-voltage transmission unit 201 includes: a second PMOS transistor Q3 and a second resistor R2; the drain of the second PMOS transistor Q3 is connected to the second terminal TP2 of the DC power supply, the gate of the second PMOS transistor Q3 is connected to the first terminal TP1 of the DC power supply and the first terminal of the second resistor R2, and the source of the second PMOS transistor Q3 is connected to the positive terminal OP1 of the load and the second terminal of the second resistor R2.

[0043] It should be understood that the second PMOS transistor Q3 is turned on when TP2 is a high-level signal and TP1 is a low-level signal, and turned off when TP2 is a low-level signal and TP1 is a high-level signal, thus transmitting the high-level signal to the positive terminal of the load.

[0044] Furthermore, the reverse low-voltage transmission unit 202 includes: a second NMOS transistor Q4; the drain of the second NMOS transistor Q4 is connected to the first terminal TP1 of the DC power supply, the gate of the second NMOS transistor Q4 is connected to the second terminal TP2 of the DC power supply, and the source of the second NMOS transistor Q4 is connected to the negative terminal OP2 of the load.

[0045] It should be understood that the second NMOS transistor Q4 is turned on when TP2 is a high-level signal and TP1 is a low-level signal, and turned off when TP2 is a low-level signal and TP1 is a high-level signal, thus transmitting the low-level signal to the negative terminal of the load.

[0046] In this embodiment, when TP1 receives a high-level signal and TP2 receives a low-level signal, the first PMOS transistor Q1 is turned on, the first NMOS transistor Q2 is turned on, the second PMOS transistor Q3 is turned off, and the second NMOS transistor Q4 is turned off. The positive terminal OP1 of the load receives a high-level signal, and the negative terminal OP2 of the load receives a low-level signal. When TP2 receives a high-level signal and TP1 receives a low-level signal, the first PMOS transistor Q1 is turned off, the first NMOS transistor Q2 is turned off, the second PMOS transistor Q3 is turned on, and the second NMOS transistor Q4 is turned on. The positive terminal OP1 of the load receives a high-level signal, and the negative terminal OP2 of the load receives a low-level signal. By using a field-effect transistor array to control the polarity of the DC power supply input, the stability of the load operation is ensured, conduction losses are reduced, mechanical contact wear is eliminated, and the polarity switching speed is increased to the microsecond level.

[0047] Based on the first and / or second embodiments of this utility model, in the third embodiment of this utility model, the contents that are the same as or similar to those in the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 , Figure 4 The circuit connection diagram provided for the third embodiment of the polarity adaptive circuit of this utility model is shown.

[0048] In this embodiment, the polarity adaptive circuit further includes an output detection module 30. The first terminal of the output detection module 30 is connected to the positive terminal OP1 of the load, and the second terminal of the output detection module 30 is connected to the negative terminal OP2 of the load.

[0049] It should be noted that the output detection module 30 can be used to acquire high-level signals and low-level signals, calculate whether the amplitude difference between the high-level signal and the low-level signal is the load potential difference, and if so, transmit the high-level signal and the low-level signal to the load.

[0050] It should be understood that the load potential difference can be the DC potential difference between the positive and negative terminals of the load when it is operating at its rated capacity. If the first transmission module 10 or the second transmission module 20 experiences a hardware failure or a DC power supply failure, it may cause abnormal electrical signals transmitted to the load, resulting in load damage. By setting the output detection module 30 to sample and detect the electrical signals transmitted to the load, the circuit breaker can be tripped in time when abnormal conditions occur.

[0051] In one possible implementation, the output detection module 30 includes: a third resistor R3, a fourth resistor R4, and a microcontroller unit (MCU); the first end of the third resistor R3 is connected to the positive terminal OP1 of the load, the first end of the fourth resistor R4 is connected to the negative terminal OP2 of the load, and the second end of the third resistor R3 is connected to the second end of the fourth resistor R4 and the first end of the microcontroller.

[0052] It should be noted that the electrical signal transmitted to the load is sampled through the resistor network formed by the third and fourth resistors, and transmitted to the MCU's ADC port to realize the electrical signal detection function. The electrical signal is compared with the load potential difference pre-stored in the MCU to monitor the load voltage status in real time. At the same time, a switching transistor or relay element (not shown in the figure) can be placed on the positive terminal of the load, which is controlled by the MCU to trip when a fault or abnormal condition is detected, so as to avoid damage to the hardware circuit.

[0053] Further, please refer to Figure 5 , Figure 5 This is a circuit connection diagram provided for one embodiment of the electronic device of this utility model. This utility model also proposes an electronic device. The electronic device includes the polarity adaptive circuit described above.

[0054] Since the electronic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0055] It should be noted that the above examples are only for understanding this utility model and do not constitute a limitation on the polarity adaptive circuit of this utility model. Any simple modifications based on this technical concept are within the protection scope of this utility model.

[0056] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. All equivalent structural transformations made under the concept of the present utility model and based on the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A polarity adaptive circuit, characterized in that, The polarity adaptive circuit includes: a first transmission module and a second transmission module; The first input terminal and the first control terminal of the first transmission module are connected to the first terminal of the DC power supply, the second input terminal and the second control terminal of the first transmission module are connected to the second terminal of the DC power supply, the first output terminal of the first transmission module is connected to the positive terminal of the load, and the second output terminal of the first transmission module is connected to the negative terminal of the load. The first input terminal and the first control terminal of the second transmission module are connected to the second terminal of the DC power supply, the second input terminal and the second control terminal of the second transmission module are connected to the first terminal of the DC power supply, the first output terminal of the second transmission module is connected to the positive terminal of the load, and the second output terminal of the second transmission module is connected to the negative terminal of the load. The first transmission module is configured to transmit the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load when it receives a high-level signal from the first terminal of the DC power supply and a low-level signal from the second terminal of the DC power supply. The second transmission module is used to transmit the high-level signal to the positive terminal of the load and the low-level signal to the negative terminal of the load when it receives a low-level signal from the first terminal of the DC power supply and a high-level signal from the second terminal of the DC power supply.

2. The polarity adaptive circuit as described in claim 1, characterized in that, The first transmission module includes: a forward high-voltage transmission unit and a forward low-voltage transmission unit; The input terminal of the positive high voltage transmission unit is connected to the first terminal of the DC power supply, the control terminal of the positive high voltage transmission unit is connected to the second terminal of the DC power supply, and the output terminal of the positive high voltage transmission unit is connected to the positive terminal of the load. The input terminal of the positive low-voltage transmission unit is connected to the second terminal of the DC power supply, the control terminal of the positive low-voltage transmission unit is connected to the first terminal of the DC power supply, and the output terminal of the positive low-voltage transmission unit is connected to the negative terminal of the load. The positive high voltage transmission unit is used to transmit the high-level signal received at the input terminal to the positive terminal of the load when the control terminal receives a low-level signal; The positive low-voltage transmission unit is used to transmit the low-level signal received at the input terminal to the negative terminal of the load when a high-level signal is received at the control terminal.

3. The polarity adaptive circuit as described in claim 2, characterized in that, The positive high-voltage transmission unit includes: a first PMOS transistor and a first resistor; The drain of the first PMOS transistor is connected to the first terminal of the DC power supply, the gate of the first PMOS transistor is connected to the second terminal of the DC power supply and the first terminal of the first resistor, and the source of the first PMOS transistor is connected to the positive terminal of the load and the second terminal of the first resistor.

4. The polarity adaptive circuit as described in claim 3, characterized in that, The forward low-voltage transmission unit includes: a first NMOS transistor; The drain of the first NMOS transistor is connected to the second terminal of the DC power supply, the gate of the first NMOS transistor is connected to the first terminal of the DC power supply, and the source of the first NMOS transistor is connected to the negative terminal of the load.

5. The polarity adaptive circuit as described in claim 1, characterized in that, The second transmission module includes: a reverse high-voltage transmission unit and a reverse low-voltage transmission unit; The input terminal of the reverse high voltage transmission unit is connected to the second terminal of the DC power supply, the control terminal of the reverse high voltage transmission unit is connected to the first terminal of the DC power supply, and the output terminal of the reverse high voltage transmission unit is connected to the positive terminal of the load. The input terminal of the reverse low-voltage transmission unit is connected to the first terminal of the DC power supply, the control terminal of the reverse low-voltage transmission unit is connected to the second terminal of the DC power supply, and the output terminal of the reverse low-voltage transmission unit is connected to the negative terminal of the load. The reverse high-voltage transmission unit is used to transmit the high-level signal received at the input terminal to the positive terminal of the load when the control terminal receives a low-level signal. The reverse low-voltage transmission unit is used to transmit the low-level signal received at the input terminal to the negative terminal of the load when a high-level signal is received at the control terminal.

6. The polarity adaptive circuit as described in claim 5, characterized in that, The reverse high-voltage transmission unit includes: a second PMOS transistor and a second resistor; The drain of the second PMOS transistor is connected to the second terminal of the DC power supply, the gate of the second PMOS transistor is connected to the first terminal of the DC power supply and the first terminal of the second resistor, and the source of the second PMOS transistor is connected to the positive terminal of the load and the second terminal of the second resistor.

7. The polarity adaptive circuit as described in claim 6, characterized in that, The reverse low-voltage transmission unit includes: a second NMOS transistor; The drain of the second NMOS transistor is connected to the first terminal of the DC power supply, the gate of the second NMOS transistor is connected to the second terminal of the DC power supply, and the source of the second NMOS transistor is connected to the negative terminal of the load.

8. The polarity adaptive circuit as described in claim 7, characterized in that, The polarity adaptive circuit further includes: an output detection module; The first terminal of the output detection module is connected to the positive terminal of the load, and the second terminal of the output detection module is connected to the negative terminal of the load. The output detection module is used to collect the high-level signal and the low-level signal, calculate whether the amplitude difference between the high-level signal and the low-level signal is the load potential difference, and if so, transmit the high-level signal and the low-level signal to the load.

9. The polarity adaptive circuit as described in claim 8, characterized in that, The output detection module includes: a third resistor, a fourth resistor, and a microcontroller; The first end of the third resistor is connected to the positive terminal of the load, the first end of the fourth resistor is connected to the negative terminal of the load, and the second end of the third resistor is connected to the second end of the fourth resistor and the first end of the microcontroller.

10. An electronic device, characterized in that, The electronic device includes: a polarity adaptive circuit as described in any one of claims 1-9.

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