Communication signal conversion circuit, motor controller and vehicle

Abstract

The utility model relates to a communication signal conversion circuit, a motor controller and a vehicle. The communication signal conversion circuit comprises a reverse-phase sub-circuit and a normal-phase sub-circuit; the input end of the anti-phase sub-circuit is connected with an external single-ended signal output end, and the output end of the anti-phase sub-circuit is connected with an external differential signal negative input end; the input end of the normal-phase sub-circuit is connected with an external single-ended signal output end, and the output end of the normal-phase sub-circuit is connected with an external differential signal positive input end; wherein the anti-phase sub-circuit receives a single-ended signal output by an external single-ended signal output end from the input end, converts the single-ended signal into a negative polarity signal of a differential signal, and outputs the negative polarity signal to an external differential signal negative input end from the output end; the positive phase sub-circuit receives a single-ended signal output by an external single-ended signal output end from the input end, converts the single-ended signal into a positive polarity signal of a differential signal, and outputs the positive polarity signal to an external differential signal positive input end from the output end; therefore, high-quality signal transmission of the communication port is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a communication signal conversion circuit, a motor controller and a vehicle. BACKGROUND

[0002] With the continuous progress of new energy vehicle technology, the richness and reliability of the motor controller function in the vehicle are increasingly improved, and the high-quality transmission of the communication port signal of the motor controller is particularly important.

[0003] Generally, in various complex working conditions of the actual operation of the vehicle, the ordinary communication port signal, such as the I / O port signal, is easily disturbed and coupled without isolation. Therefore, in the related art, a filter is used to filter out the interference of the communication port signal. However, the precision of the passband and the stopband of the filter is easily affected by the precision of inductors, capacitors, resistors and the like, and the filter will cause signal delay and signal distortion. Therefore, it is urgent to propose a new scheme for ensuring high-quality transmission of the communication port signal. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a new communication signal conversion circuit, a motor controller and a vehicle for ensuring high-quality transmission of the communication port signal.

[0005] In a first aspect, the present application provides a communication signal conversion circuit, which comprises an inverting sub-circuit and a non-inverting sub-circuit; an input end of the inverting sub-circuit is connected to an external single-ended signal output end, and an output end of the inverting sub-circuit is connected to an external differential signal negative input end; an input end of the non-inverting sub-circuit is connected to the external single-ended signal output end, and an output end of the non-inverting sub-circuit is connected to an external differential signal positive input end; wherein,

[0006] The inverting sub-circuit receives a single-ended signal output by the external single-ended signal output end from the input end, converts the single-ended signal into a negative polarity signal of a differential signal, and outputs the negative polarity signal to the external differential signal negative input end from the output end;

[0007] The non-inverting sub-circuit receives a single-ended signal output by the external single-ended signal output end from the input end, converts the single-ended signal into a positive polarity signal of a differential signal, and outputs the positive polarity signal to the external differential signal positive input end from the output end.

[0008] In one embodiment, the inverting sub-circuit comprises an inverter module and a first current limiting module.

[0009] The input end of the inverter module is connected to the external single-ended signal output end, and the output end of the inverter module is connected to the external differential signal negative input end through the first current limiting module.

[0010] In one of the embodiments, the inverter module comprises an inverter, and the first current limiting module comprises a first resistor unit;

[0011] The input end of the inverter is connected to the external single-ended signal output end, and the output end of the inverter module is connected to the external differential signal negative input end through the first resistor unit.

[0012] In one of the embodiments, the non-inverting sub-circuit comprises a non-inverter module, a second current limiting module and a pull-up resistor module;

[0013] The input end of the non-inverter module is connected to the external single-ended signal output end, the output end of the non-inverter module is connected to the external differential signal positive input end through the second current limiting module, and the output end of the non-inverter module is connected to the first power supply voltage through the pull-up resistor module.

[0014] In one of the embodiments, the non-inverter module comprises a non-inverter, and the second current limiting module comprises a second resistor unit;

[0015] The input end of the non-inverter is connected to the external single-ended signal output end, and the output end of the non-inverter module is connected to the external differential signal positive input end through the second resistor unit.

[0016] In one of the embodiments, the output end of the inverting sub-circuit and the output end of the non-inverting sub-circuit are respectively connected to a voltage amplitude adjustment module;

[0017] The two input ends of the voltage amplitude adjustment module are connected to the first power supply voltage and the reference ground signal respectively, and the output end of the voltage amplitude adjustment module is connected to the output end of the inverting sub-circuit or the output end of the non-inverting sub-circuit.

[0018] In one of the embodiments, the voltage amplitude adjustment module comprises a third resistor unit and a fourth resistor unit;

[0019] The first end of the third resistor unit is connected to the first power supply voltage, and the second end of the third resistor unit is connected to the output end of the inverting sub-circuit or the output end of the non-inverting sub-circuit;

[0020] The first end of the fourth resistor unit is connected to the second end of the third resistor unit, and the second end of the fourth resistor unit is connected to the reference ground signal.

[0021] In one of the embodiments, the communication signal conversion circuit further comprises a single-ended conversion sub-circuit; the two input ends of the single-ended conversion sub-circuit are connected to the output end of the inverting sub-circuit and the output end of the non-inverting sub-circuit respectively, and the output end of the single-ended conversion sub-circuit is connected to the external single-ended signal input end.

[0022] The single-ended conversion sub-circuit receives the negative polarity signal of the differential signal and the positive polarity signal of the differential signal from two input terminals respectively, converts the negative polarity signal of the differential signal and the positive polarity signal of the differential signal into a single-ended signal, and then outputs to the external single-ended signal input terminal from an output terminal.

[0023] In one embodiment, the single-ended conversion sub-circuit comprises a differential negative terminal comparator module, a differential positive terminal comparator module, and an output terminal comparator module.

[0024] The input terminal of the differential negative terminal comparator module is connected to the output terminal of the inverting sub-circuit, and the output terminal of the differential negative terminal comparator module is connected to the first input terminal of the output terminal comparator module; the differential negative terminal comparator module compares the negative polarity signal of the differential signal with a first reference voltage and outputs a first level signal.

[0025] The input terminal of the differential positive terminal comparator module is connected to the output terminal of the non-inverting sub-circuit, and the output terminal of the differential positive terminal comparator module is connected to the second input terminal of the output terminal comparator module; the differential positive terminal comparator module compares the positive polarity signal of the differential signal with a second reference voltage and outputs a second level signal.

[0026] The output terminal of the output terminal comparator module is connected to the external single-ended signal input terminal; the output terminal comparator converts the first level signal and the second level signal into the single-ended signal.

[0027] In one embodiment, the differential negative terminal comparator module comprises a first comparator and a first reference unit, and the differential positive terminal comparator module comprises a second comparator and a second reference unit.

[0028] The first input terminal of the first comparator is connected to the output terminal of the inverting sub-circuit, the second input terminal of the first comparator is connected to the first reference unit, and the output terminal of the first comparator is connected to the first input terminal of the output terminal comparator module.

[0029] The first input terminal of the second comparator is connected to the output terminal of the non-inverting sub-circuit, the second input terminal of the second comparator is connected to the second reference unit, and the output terminal of the second comparator is connected to the second input terminal of the output terminal comparator.

[0030] In one embodiment, the negative power supply terminal of the first comparator and the second comparator is connected to a reference ground signal, and the positive power supply terminal of the first comparator and the second comparator is connected to a first power supply voltage.

[0031] In one of the embodiments, the output comparator module comprises a third comparator, a fifth resistance unit, a sixth resistance unit and a seventh resistance unit;

[0032] The first input terminal of the third comparator is connected to the output terminal of the differential negative terminal comparator module, the second input terminal of the third comparator is connected to the output terminal of the differential positive terminal comparator module, and the output terminal of the third comparator is connected to the external single-end signal input terminal; wherein the positive power supply terminal of the third comparator is connected to a reference ground signal, and the negative power supply terminal of the third comparator is connected to a first power supply voltage;

[0033] The first terminal of the fifth resistance unit is connected to the first power supply voltage, and the second terminal of the fifth resistance unit is connected to the first input terminal of the third comparator;

[0034] The first terminal of the sixth resistance unit is connected to the first power supply voltage, and the second terminal of the sixth resistance unit is connected to the second input terminal of the third comparator;

[0035] The first terminal of the seventh resistance unit is connected to the second power supply voltage, and the second terminal of the seventh resistance unit is connected to the output terminal of the third comparator.

[0036] In a second aspect, the application further provides a motor controller, comprising the communication signal conversion circuit according to the first aspect.

[0037] In a third aspect, the application further provides a vehicle, comprising the communication signal conversion circuit according to the first aspect.

[0038] In a fourth aspect, the application further provides a vehicle, comprising the motor controller according to the second aspect.

[0039] The communication signal conversion circuit, the motor controller and the vehicle have the following advantages. The inverting sub-circuit and the non-inverting sub-circuit are arranged, the input end of the inverting sub-circuit is connected with the external single-end signal output end, the output end of the inverting sub-circuit is connected with the external differential signal negative input end, the input end of the non-inverting sub-circuit is connected with the external single-end signal output end, and the output end of the non-inverting sub-circuit is connected with the external differential signal positive input end. Based on this, the inverting sub-circuit receives the single-end signal from the external single-end signal output end, converts the single-end signal into the negative polarity signal of the differential signal, and then outputs the negative polarity signal to the external differential signal negative input end. The non-inverting sub-circuit receives the single-end signal from the external single-end signal output end, converts the single-end signal into the positive polarity signal of the differential signal, and then outputs the positive polarity signal to the external differential signal positive input end. In this way, the single-end signal output by the external single-end signal output end is converted into the differential signal by the communication signal conversion circuit, so that the differential signal is transmitted. The differential signal has strong anti-interference ability, can effectively suppress EMI, and has accurate timing positioning. Therefore, the high-quality transmission of the signal is ensured, and a filter does not need to be arranged for filtering processing, that is, the filter is omitted, so that signal distortion is avoided, the signal integrity is ensured, and the transmission cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other accompanying drawings can be obtained by those skilled in the art without any creative effort.

[0041] Figure 1 FIG. 1 is a structural schematic diagram of a communication signal conversion circuit according to an embodiment of the present application;

[0042] Figure 2 FIG. 2 is a structural schematic diagram of a communication signal conversion circuit according to another embodiment of the present application;

[0043] Figure 3 FIG. 3 is a structural schematic diagram of a communication signal conversion circuit according to another embodiment of the present application;

[0044] Figure 4 FIG. 4 is a structural schematic diagram of a communication signal conversion circuit according to another embodiment of the present application;

[0045] Figure 5 FIG. 5 is a structural schematic diagram of a communication signal conversion circuit according to another embodiment of the present application;

[0046] Figure 6 FIG. 6 is a structural schematic diagram of a communication signal conversion circuit according to another embodiment of the present application;

[0047] Figure 7 FIG. 7 is a structural schematic diagram of a communication signal conversion circuit according to another embodiment of the present application;

[0048] Figure 8 Structure diagram of a communication signal conversion circuit according to an embodiment;

[0049] Figure 9 Structure diagram of a communication signal conversion circuit according to an embodiment;

[0050] Figure 10 Structure diagram of a communication signal conversion circuit according to an embodiment;

[0051] Figure 11 Structure diagram of a single-ended conversion sub-circuit according to an embodiment;

[0052] Figure 12 Structure diagram of a single-ended conversion sub-circuit according to an embodiment;

[0053] Figure 13 Structure diagram of a single-ended conversion sub-circuit according to an embodiment;

[0054] Figure 14 Working state diagram of a communication signal conversion circuit according to an embodiment;

[0055] Figure 15 Working state diagram of a communication signal conversion circuit according to an embodiment.

[0056] BRIEF DESCRIPTION OF DRAWINGS A-external single-ended signal output end, B-external differential signal negative input end, C-external differential signal positive input end, D-external single-ended signal input end, 1-communication signal conversion circuit, 10-inversion sub-circuit, 20-non-inversion sub-circuit, 110-inverter module, 120-first current limiting module, 210-non-inverter module, 220-second current limiting module, 230-pull-up resistance module, 30-voltage amplitude adjustment module, 50-single-ended conversion sub-circuit, 510-differential negative end comparator module, 520-differential positive end comparator module, 530-output end comparator module. DETAILED DESCRIPTION

[0057] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings. The drawings show embodiments of the present application. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0058] Unless otherwise defined, 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0059] It can be understood that the terms "first", "second" and the like used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of the present application, a first resistor can be called a second resistor, and similarly, a second resistor can be called a first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0060] It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection" and the like if the circuits, modules, units and the like connected by the connection have transmission of electrical signals or data between each other.

[0061] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0062] As used herein, the singular forms "a", "an" and "the" can also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / comprising" or "have / having" or the like specify the presence of the stated features, integers, steps, operations, components, parts or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in the specification includes any and all combinations of the related listed items.

[0063] In one exemplary embodiment, with reference to Figure 1 A communication signal conversion circuit 1 can be applied to transmission of single-ended signals, which includes an inverting sub-circuit 10 and a non-inverting sub-circuit 20.

[0064] The input end of the inverting sub-circuit 10 is connected to the external single-ended signal output end A, and the output end of the inverting sub-circuit 10 is connected to the external differential signal negative input end B. The inverting sub-circuit 10 is a hardware circuit with the function of an inverter, which can include inverter and resistance and other circuit components. Based on this, the inverting sub-circuit 10 can receive the single-ended signal output by the external single-ended signal output end A from the input end of the inverting sub-circuit 10, and convert the single-ended signal into a negative polarity signal of a differential signal, and then output the negative polarity signal from the output end of the inverting sub-circuit 10 to the external differential signal negative input end B.

[0065] The input end of the positive phase sub-circuit 20 is connected with the external single-end signal output end A, and the output end of the positive phase sub-circuit 20 is connected with the external differential signal positive input end C. The positive phase sub-circuit 20 is a hardware circuit and has the function of a positive phase converter, which can include a positive phase converter and circuit components such as resistors. Therefore, the positive phase sub-circuit 20 can receive the single-end signal output by the external single-end signal output end A from the input end of the positive phase sub-circuit 20, and convert the single-end signal into a positive polarity signal of a differential signal, and then output the positive polarity signal from the output end of the positive phase sub-circuit 20 to the external differential signal positive input end C.

[0066] The external single-end signal output end A can be any external communication port for outputting a single-end signal, and the output single-end signal needs to be transmitted. The communication protocol of the communication port is arbitrary and is not limited specifically, and is adapted to the actual application scenario. The external differential signal negative input end B can be any external communication port for receiving a negative polarity signal of a differential signal, and the transmitted negative polarity signal of the differential signal needs to be received. The communication protocol of the communication port is arbitrary and is not limited specifically, and is adapted to the actual application scenario. The external differential signal positive input end C can be any external communication port for receiving a positive polarity signal of a differential signal, and the transmitted positive polarity signal of the differential signal needs to be received. The communication protocol of the communication port is arbitrary and is not limited specifically, and is adapted to the actual application scenario.

[0067] According to the scheme of the embodiment of the application, the single-end signal output by the external single-end signal output end A is converted into a differential signal by the communication signal conversion circuit 1, so as to be transmitted in the form of a differential signal and transmitted to the external differential signal input end. The originally transmitted single-end signal is converted into a differential signal for transmission. The differential signal has strong anti-interference ability, can effectively suppress EMI, and has accurate timing positioning. Therefore, the high-quality transmission of the single-end signal is ensured, and a filter does not need to be set for filtering processing, that is, the setting of the filter is omitted, so as to avoid signal distortion, ensure signal integrity, and reduce transmission cost.

[0068] In an exemplary embodiment, referring to Figure 2 The inverting sub-circuit 10 includes an inverter module 110 and a first current limiting module 120.

[0069] The input end of the inverter module 110 is connected with the external single-end signal output end A, and the output end of the inverter module 110 is connected with the external differential signal negative input end B through the first current limiting module 120.

[0070] The inverter module 110 can include at least one inverter, and includes at least one inverter. The input end of the inverter module 110 is used to receive the single-ended signal output by the external single-ended signal output end A; the first current limiting module 120 is used to limit the current of the output end of the inverter module 110, so as to protect the inverter module 110; the inverter module 110 converts the single-ended signal into a negative polarity signal of the differential signal, and outputs the negative polarity signal from the output end of the inverter module 110 to the external differential signal negative input end B through the first current limiting module 120.

[0071] In an exemplary embodiment, referring to Figure 3 The inverter module 110 includes an inverter U1, and the first current limiting module 120 includes a first resistance unit, so that the structure of the inverter sub-circuit 10 is simple, easy to implement, and low in cost.

[0072] The input end of the inverter U1 is connected to the external single-ended signal output end A, and the output end of the inverter module 110 is connected to the external differential signal negative input end B through the first resistance unit. The first resistance unit includes at least one resistance, and includes at least one resistance. For example, the first resistance unit includes a first resistance R1.

[0073] In an exemplary embodiment, referring to Figure 4 The non-inverting sub-circuit 20 includes a non-inverter module 210, a second current limiting module 220, and a pull-up resistance module 230.

[0074] The input end of the non-inverter module 210 is connected to the external single-ended signal output end A, the output end of the non-inverter module 210 is connected to the external differential signal positive input end C through the second current limiting module 220, and the output end of the non-inverter module 210 is connected to the first power supply voltage VCC through the pull-up resistance module 230.

[0075] The non-inverter module 210 can include at least one non-inverter, and includes at least one non-inverter. The input end of the non-inverter module 210 is used to receive the single-ended signal output by the external single-ended signal output end A; the second current limiting module 220 is used to limit the current of the output end of the non-inverter module 210, so as to protect the non-inverter module 210; the non-inverter module 210 converts the single-ended signal into a positive polarity signal of the differential signal, and outputs the positive polarity signal from the output end of the non-inverter module 210 to the external differential signal positive input end C through the second current limiting module 220. In addition, the non-inverter module 210 is used in combination with the pull-up resistance module 230, which can improve the load capacity of the external single-ended signal output end A.

[0076] In an exemplary embodiment, referring to Figure 5The inverter module 210 includes an inverter U2, and the second current limiting module 220 includes a second resistor unit. Thus, the structure of the inverter sub-circuit 20 is simple, easy to implement, and low in cost.

[0077] The input terminal of the inverter U2 is connected to the external single-ended signal output terminal A, and the output terminal of the inverter module 210 is connected to the external differential signal positive input terminal C through the second resistor unit. The second resistor unit includes at least one resistor, and for example, the second resistor unit includes a second resistor R2. The pull-up resistor module 230 includes at least one resistor, and for example, the pull-up resistor module 230 includes a third resistor R3.

[0078] In one exemplary embodiment, reference is made to Figure 6 The output terminals of the inverting sub-circuit 10 and the positive sub-circuit 20 are respectively connected to a voltage amplitude adjustment module 30.

[0079] The two input terminals of the voltage amplitude adjustment module 30 are respectively connected to the first power supply voltage VCC and the reference ground signal GND, and the output terminal of the voltage amplitude adjustment module 30 is correspondingly connected to the output terminal of the inverting sub-circuit 10 or the output terminal of the non-inverting sub-circuit 20. That is, the voltage amplitude adjustment module 30 can adjust the voltage amplitude of the signal at the output terminal of the inverting sub-circuit 10; and the voltage amplitude adjustment module 30 can adjust the voltage amplitude of the signal at the output terminal of the non-inverting sub-circuit 20.

[0080] In one exemplary embodiment, reference is made to Figure 7 The voltage amplitude adjustment module 30 includes a third resistor unit and a fourth resistor unit.

[0081] The first terminal of the third resistor unit is connected to the first power supply voltage VCC, and the second terminal of the third resistor unit is connected to either the output terminal of the inverting sub-circuit 10 or the output terminal of the non-inverting sub-circuit 20. The first terminal of the fourth resistor unit is connected to the second terminal of the third resistor unit, and the second terminal of the fourth resistor unit is connected to the reference ground signal GND.

[0082] The third resistor unit includes at least one resistor, and exemplary, refer to Figure 8 The third resistor unit includes a fourth resistor R4. The fourth resistor unit includes at least one resistor, and exemplary, referencing... Figure 8 The fourth resistor unit includes the fifth resistor R5, thus simplifying the structure of the voltage amplitude adjustment module 30, making the voltage amplitude adjustment module 30 easy to implement and low in cost.

[0083] In one exemplary embodiment, reference is made to Figure 9 The communication signal conversion circuit 1 also includes a single-ended conversion sub-circuit 50.

[0084] The two inputs of the single-ended conversion sub-circuit 50 are connected to the output of the inverting sub-circuit 10 and the output of the non-inverting sub-circuit 20 respectively, and the output of the single-ended conversion sub-circuit 50 is connected to the external single-ended signal input terminal D. The single-ended conversion sub-circuit 50 is a hardware circuit and can include a comparator and a resistor and other circuit components. Based on this, the single-ended conversion sub-circuit 50 receives the negative polarity signal of the differential signal output by the output of the inverting sub-circuit 10 and the positive polarity signal of the differential signal output by the output of the non-inverting sub-circuit 20 from the two inputs of the single-ended conversion sub-circuit 50, and converts the negative polarity signal of the differential signal and the positive polarity signal of the differential signal into a single-ended signal, and then outputs the single-ended signal from the output of the single-ended conversion sub-circuit 50 to the external single-ended signal input terminal D.

[0085] The external single-ended signal input terminal D can be any external communication port receiving a single-ended signal, and needs to receive the transmitted single-ended signal. The communication protocol of the communication port is arbitrary and is not specifically limited, and can be adapted to the actual application scenario.

[0086] The single-ended signal output by the external single-ended signal output terminal A is first converted into a differential signal by the communication signal conversion circuit 1, and then transmitted in the form of a differential signal, and then converted into a single-ended signal and input to the external single-ended signal input terminal D.

[0087] In other words, in the scenario where the externally output signal is a single-ended signal, the single-ended signal needs to be transmitted, and the differential signal needs to be received, the communication signal conversion circuit 1 can output the converted differential signal to the external differential signal input terminal; and in the scenario where the externally output signal is a single-ended signal, the single-ended signal needs to be transmitted, and the single-ended signal needs to be received, the communication signal conversion circuit 1 can convert the converted differential signal into a single-ended signal and output it to the external single-ended signal input terminal D.

[0088] For the single-ended signal that needs to be transmitted, the communication signal conversion circuit 1 in the embodiment converts it into a differential signal for transmission. The differential signal has strong anti-interference ability, can effectively suppress EMI, and has accurate timing positioning, thereby ensuring high-quality transmission of the signal, and at the same time, it can not be necessary to set a filter for filtering processing, i.e. the setting of the filter is omitted, thereby avoiding signal distortion and ensuring signal integrity, and reducing transmission cost.

[0089] In an exemplary embodiment, with reference to Figure 10 The single-ended conversion sub-circuit 50 includes a differential negative terminal comparator module 510, a differential positive terminal comparator module 520, and an output terminal comparator module 530.

[0090] The input end of the differential negative end comparator module 510 is connected to the output end of the inverting sub-circuit 10, and the output end of the differential negative end comparator module 510 is connected to the first input end of the output end comparator module 530; wherein the differential negative end comparator module 510 compares the negative polarity signal of the differential signal with the first reference voltage and outputs a first level signal.

[0091] The input end of the differential positive end comparator module 520 is connected to the output end of the non-inverting sub-circuit 20, and the output end of the differential positive end comparator module 520 is connected to the second input end of the output end comparator module 530; wherein the differential positive end comparator module 520 compares the positive polarity signal of the differential signal with the second reference voltage and outputs a second level signal.

[0092] The output end of the output end comparator module 530 is connected to the external single-end signal input end D; wherein the output end comparator module 530 converts the first level signal and the second level signal into a single-end signal and outputs the converted single-end signal to the external single-end signal input end D.

[0093] The differential negative end comparator module 510 can include at least one comparator, and the differential positive end comparator module 520 can include at least one comparator. The output end comparator module 530 can include at least one comparator.

[0094] In an exemplary embodiment, referring to Figure 11 The differential negative end comparator module 510 includes a first comparator U3 and a first reference unit for providing a first reference voltage. The first reference unit is connected to the second input end of the first comparator U3, the first input end of the first comparator U3 is connected to the output end of the inverting sub-circuit 10, and the output end of the first comparator U3 is connected to the first input end of the output end comparator module 530. Exemplarily, the negative input end of the first comparator U3 is connected to the first reference unit, the positive input end of the first comparator U3 is connected to the output end of the inverting sub-circuit 10, the positive power supply end of the first comparator U3 is connected to a +24V voltage, and the negative power supply end of the first comparator U3 is connected to a reference ground signal GND. In this way, the structure of the differential negative end comparator module 510 is simple, easy to implement, and low in cost.

[0095] In an exemplary embodiment, referring to Figure 11The differential positive terminal comparator module 520 comprises a second comparator U4 and a second reference unit for providing a second reference voltage. The second reference unit is connected to the second input terminal of the second comparator U4, the first input terminal of the second comparator U4 is connected to the output terminal of the positive phase sub-circuit 20, and the output terminal of the second comparator U4 is connected to the second input terminal of the output terminal comparator module 530. For example, the negative input terminal of the second comparator U4 is connected to the second reference unit, the positive input terminal of the second comparator U4 is connected to the output terminal of the positive phase sub-circuit 20, the positive power supply terminal of the second comparator U4 is connected to a +24V voltage, and the negative power supply terminal of the second comparator U4 is connected to a reference ground signal GND. In this way, the structure of the differential positive terminal comparator module 520 is simple, easy to implement, and low in cost. The +24V voltage can be used as the first power supply voltage.

[0096] In an exemplary embodiment, the reference Figure 12 The first reference unit comprises a sixth resistor R6 and a seventh resistor R7, which are respectively connected to GND and VCC. The connection point of the sixth resistor R6 and the seventh resistor R7 is connected to the negative input terminal of the first comparator U3. The second reference unit comprises an eighth resistor R8 and a ninth resistor R9, which are respectively connected to GND and VCC. The connection point of the eighth resistor R8 and the ninth resistor R9 is connected to the negative input terminal of the second comparator U4. In this way, the structures of the first reference unit and the second reference unit are simple, easy to implement, and low in cost.

[0097] In an exemplary embodiment, the reference Figure 13 The output terminal comparator module 530 comprises a third comparator U5. The two input terminals of the third comparator U5 are respectively connected to the output terminal of the first comparator U3 and the output terminal of the second comparator U4. For example, the negative input terminal of the third comparator U5 is connected to the output terminal of the first comparator U3, and the positive input terminal of the third comparator U5 is connected to the output terminal of the second comparator U4.

[0098] To ensure the reliability of the operation of the comparator U5, the output terminal comparator module 530 further comprises a fifth resistor unit, a sixth resistor unit, and a seventh resistor unit. The first terminal of the fifth resistor unit is connected to the first power supply voltage, and the second terminal of the fifth resistor unit is connected to the first input terminal of the third comparator. The first terminal of the sixth resistor unit is connected to the first power supply voltage, and the second terminal of the sixth resistor unit is connected to the second input terminal of the third comparator. The first terminal of the seventh resistor unit is connected to the second power supply voltage, and the second terminal of the seventh resistor unit is connected to the output terminal of the third comparator. The fifth resistor unit, the sixth resistor unit, and the seventh resistor unit can each comprise at least one resistor. For example, the fifth resistor unit, the sixth resistor unit, and the seventh resistor unit respectively comprise resistors R10, R11, and R12.

[0099] The negative input end of the third comparator U5 is connected with a resistor R10 connected to VCC, the positive input end of the third comparator U5 is connected with a resistor R11 connected to VCC, and the output end of the third comparator U5 is connected with a resistor R12 connected to VDD; the negative power supply end of the comparator U5 is connected to VCC, and the positive power supply end of the comparator U5 is connected to GND; wherein the voltage values of VDD and VCC can be the same or different, which can be set by the user according to the actual application requirement. In this way, the structure of the output end comparator module 530 is simple, easy to implement, and low in cost.

[0100] The following takes Figure 14 and Figure 15 as an example to further supplement the communication signal conversion circuit 1 provided by the embodiment of the application:

[0101] Referring to Figure 14 , when the single-ended signal output by the external single-ended signal output end A is high "VCC", and the power supply of the inverter U1 and the non-inverter U2 is VCC:

[0102] The output of the inverter U1 is low "0", and the output of the non-inverter U2 is high "VCC"; under the action of the resistor R4 and the resistor R5, the voltage at the positive input end of the comparator U3 is, for example, 0+VCC / 3, as a negative polarity signal of the differential signal; under the action of the resistor R4 and the resistor R5, the voltage at the positive input end of the comparator U4 is, for example, VCC+VCC / 3, as a positive polarity signal of the differential signal; after comparison with the first reference voltage provided by the resistor R6 and the resistor R7, the comparator U3 outputs low "0" as the first level signal; after comparison with the second reference voltage provided by the resistor R8 and the resistor R9, the comparator U4 outputs high "VCC" as the second level signal; and the comparator U5 outputs high "VDD" as the single-ended signal converted from the first level signal and the second level signal.

[0103] Referring to Figure 15 , when the single-ended signal output by the external single-ended signal output end A is low "0", and the power supply of the inverter U1 and the non-inverter U2 is VCC:

[0104] The output of the inverter U1 is high level "VCC"; the output of the non-inverter U2 is low level "0"; under the action of the resistor R4 and the resistor R5, the voltage at the positive input of the comparator U3 is, for example, VCC+VCC / 3, as a negative polarity signal of the differential signal; under the action of the resistor R4 and the resistor R5, the voltage at the positive input of the comparator U4 is, for example, 0+VCC / 3, as a positive polarity signal of the differential signal; after comparison with the first reference voltage provided by the resistor R6 and the resistor R7, the comparator U3 outputs high level "VCC" as a first level signal; after comparison with the second reference voltage provided by the resistor R8 and the resistor R9, the comparator U4 outputs low level "0" as a second level signal; the comparator U5 outputs low level "0" as a single-ended signal converted from the first level signal and the second level signal.

[0105] In addition, in the embodiments of the present application, the specific size of the resistance value of each resistor can be configured according to the specific structure of the communication signal conversion circuit and the specific actual application scenario, which is not limited here.

[0106] The present application also provides a motor controller, which comprises the communication signal conversion circuit according to any of the above embodiments.

[0107] The motor controller and the communication signal conversion circuit provided by the embodiments of the present application belong to the same utility model concept, can solve the same technical problems, and further achieve the same technical effects, and the repeated contents will not be described here.

[0108] The present application also provides a vehicle, which comprises the communication signal conversion circuit according to any of the above embodiments.

[0109] The present application also provides a vehicle, which comprises the motor controller according to any of the above embodiments.

[0110] The vehicle and the communication signal conversion circuit provided by the embodiments of the present application belong to the same utility model concept, can solve the same technical problems, and further achieve the same technical effects, and the repeated contents will not be described here.

[0111] In the description of the present application, the description of the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0112] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application encompasses all such possible combinations.

[0113] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A communication signal conversion circuit, characterized in that, The communication signal conversion circuit includes an inverting sub-circuit and a non-inverting sub-circuit; the input terminal of the inverting sub-circuit is connected to an external single-ended signal output terminal, and the output terminal of the inverting sub-circuit is connected to an external differential signal negative input terminal; the input terminal of the non-inverting sub-circuit is connected to the external single-ended signal output terminal, and the output terminal of the non-inverting sub-circuit is connected to an external differential signal positive input terminal; wherein... The inverter sub-circuit receives the single-ended signal output from the external single-ended signal output terminal from the input terminal, converts the single-ended signal into a negative polarity signal of the differential signal, and outputs it from the output terminal to the negative input terminal of the external differential signal. The positive phase sub-circuit receives the single-ended signal output from the external single-ended signal output terminal from the input terminal, converts the single-ended signal into a positive polarity signal of the differential signal, and outputs it from the output terminal to the positive input terminal of the external differential signal.

2. The communication signal conversion circuit according to claim 1, characterized in that, The inverting sub-circuit includes an inverter module and a first current limiting module; The input terminal of the inverter module is connected to the external single-ended signal output terminal, and the output terminal of the inverter module is connected to the external differential signal negative input terminal through the first current limiting module.

3. The communication signal conversion circuit according to claim 2, characterized in that, The inverter module includes an inverter, and the first current limiting module includes a first resistor unit; The input terminal of the inverter is connected to the external single-ended signal output terminal, and the output terminal of the inverter module is connected to the external differential signal negative input terminal through the first resistor unit.

4. The communication signal conversion circuit according to claim 1, characterized in that, The positive phase sub-circuit includes a positive phase module, a second current limiting module, and a pull-up resistor module; The input terminal of the inverter module is connected to the external single-ended signal output terminal, the output terminal of the inverter module is connected to the external differential signal positive input terminal through the second current limiting module, and the output terminal of the inverter module is connected to the first power supply voltage through the pull-up resistor module.

5. The communication signal conversion circuit according to claim 4, characterized in that, The inverter module includes an inverter, and the second current limiting module includes a second resistor unit; The input terminal of the inverter is connected to the external single-ended signal output terminal, and the output terminal of the inverter module is connected to the positive input terminal of the external differential signal through the second resistor unit.

6. The communication signal conversion circuit according to claim 1, characterized in that, The output terminals of the inverting sub-circuit and the non-inverting sub-circuit are respectively connected to a voltage amplitude adjustment module; The two input terminals of the voltage amplitude adjustment module are respectively connected to the first power supply voltage and the reference ground signal, and the output terminal of the voltage amplitude adjustment module is connected to the output terminal of the inverting sub-circuit or the output terminal of the non-inverting sub-circuit.

7. The communication signal conversion circuit according to claim 6, characterized in that, The voltage amplitude adjustment module includes a third resistor unit and a fourth resistor unit; The first end of the third resistor unit is connected to the first power supply voltage, and the second end of the third resistor unit is connected to the output end of the inverting sub-circuit or the output end of the non-inverting sub-circuit. The first end of the fourth resistor unit is connected to the second end of the third resistor unit, and the second end of the fourth resistor unit is connected to the reference ground signal.

8. The communication signal conversion circuit according to any one of claims 1-7, characterized in that, The communication signal conversion circuit further includes a single-ended conversion sub-circuit; the two input terminals of the single-ended conversion sub-circuit are respectively connected to the output terminal of the inverting sub-circuit and the output terminal of the non-inverting sub-circuit, and the output terminal of the single-ended conversion sub-circuit is connected to an external single-ended signal input terminal. The single-ended converter circuit receives the negative polarity signal and the positive polarity signal of the differential signal from two input terminals respectively, converts the negative polarity signal and the positive polarity signal of the differential signal into single-ended signals, and outputs them from the output terminal to the external single-ended signal input terminal.

9. The communication signal conversion circuit according to claim 8, characterized in that, The single-ended conversion sub-circuit includes a differential negative terminal comparator module, a differential positive terminal comparator module, and an output terminal comparator module; The input terminal of the differential negative terminal comparator module is connected to the output terminal of the inverting sub-circuit, and the output terminal of the differential negative terminal comparator module is connected to the first input terminal of the output terminal comparator module; the differential negative terminal comparator module compares the negative polarity signal of the differential signal with the first reference voltage and outputs a first level signal; The input terminal of the differential positive terminal comparator module is connected to the output terminal of the positive phase sub-circuit, and the output terminal of the differential positive terminal comparator module is connected to the second input terminal of the output terminal comparator module; the differential positive terminal comparator module compares the positive polarity signal of the differential signal with the second reference voltage and outputs a second level signal. The output of the output comparator module is connected to the external single-ended signal input; the output comparator converts the first level signal and the second level signal into the single-ended signal.

10. The communication signal conversion circuit according to claim 9, characterized in that, The differential negative end comparator module includes a first comparator and a first reference unit, and the differential positive end comparator module includes a second comparator and a second reference unit; The first input terminal of the first comparator is connected to the output terminal of the inverting sub-circuit, the second input terminal of the first comparator is connected to the first reference unit, and the output terminal of the first comparator is connected to the first input terminal of the output comparator module. The first input terminal of the second comparator is connected to the output terminal of the positive phase sub-circuit, the second input terminal of the second comparator is connected to the second reference unit, and the output terminal of the second comparator is connected to the second input terminal of the output comparator. In this configuration, the negative power supply terminals of both the first comparator and the second comparator are connected to a reference ground signal, and the positive power supply terminals of both the first comparator and the second comparator are connected to a first power supply voltage.

11. The communication signal conversion circuit according to claim 9, characterized in that, The output comparator module includes a third comparator, a fifth resistor unit, a sixth resistor unit, and a seventh resistor unit; The first input terminal of the third comparator is connected to the output terminal of the differential negative comparator module, the second input terminal of the third comparator is connected to the output terminal of the differential positive comparator module, and the output terminal of the third comparator is connected to the external single-ended signal input terminal; wherein, the positive power supply terminal of the third comparator is connected to the reference ground signal, and the negative power supply terminal of the third comparator is connected to the first power supply voltage; The first end of the fifth resistor unit is connected to the first power supply voltage, and the second end of the fifth resistor unit is connected to the first input end of the third comparator. The first end of the sixth resistor unit is connected to the first power supply voltage, and the second end of the sixth resistor unit is connected to the second input end of the third comparator. The first end of the seventh resistor unit is connected to the second power supply voltage, and the second end of the seventh resistor unit is connected to the output of the third comparator.

12. A motor controller, characterized in that, The motor controller includes the communication signal conversion circuit as described in any one of claims 1-11.

13. A vehicle, characterized in that, The vehicle includes a communication signal conversion circuit as described in any one of claims 1-11.

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