1. The utility model provides a maglev train electro-magnet current detection circuit which characterized in that, the circuit includes: a forward circuit, a reverse circuit and a comparison circuit;

the forward circuit is used for carrying out positive value taking processing on an input first analog signal and outputting a first signal;

the reverse circuit is used for carrying out inversion value processing on the input second analog signal and outputting a second signal;

the first analog signal is electromagnet input current, and the second analog signal is electromagnet output current, or the first analog signal is the electromagnet output current, and the second analog signal is the electromagnet input current;

the comparison circuit is used for determining that the electromagnet input current and the electromagnet output current are normal when the sum of the first signal and the second signal is within a preset signal threshold range.

2. The circuit of claim 1, wherein the forward circuit comprises a first operational amplifier;

the first analog signal is input to a positive input end of the first operational amplifier; the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier; the output end of the first operational amplifier outputs the first signal.

3. The circuit of claim 2, wherein the inverting circuit comprises a second operational amplifier;

the second analog signal is input to an inverting input end of the second operational amplifier; the positive input end of the second operational amplifier is grounded; the inverting input end of the second operational amplifier is connected with the output end of the second operational amplifier through a first resistor; the output end of the second operational amplifier outputs the second signal;

the output end of the first operational amplifier is connected with the output end of the second operational amplifier and then is connected with the positive input end of the comparison circuit; the reverse input end of the comparison circuit inputs the preset signal threshold range; the output end of the first operational amplifier and the output end of the second operational amplifier are connected for obtaining the sum of the first signal and the second signal.

4. The circuit of any of claims 1-3, further comprising: a threshold generation circuit;

the threshold generation circuit is used for generating a target clock signal through an input clock signal; the threshold range of the target clock signal is the preset signal threshold range; the comparison circuit is used for comparing the preset signal threshold range with the sum of the first signal and the second signal.

5. The circuit of claim 4, wherein the threshold generation circuit comprises a second resistor, a third resistor, and a fourth resistor; the third resistor and the fourth resistor have the same resistance value;

one end of the second resistor is connected to the input clock signal; the other end of the second resistor, one end of the third resistor and one end of the fourth resistor are connected and then connected with the reverse input end of the comparison circuit, and the other end of the second resistor, one end of the third resistor and one end of the fourth resistor are connected and used for obtaining the target clock signal; the other end of the third resistor is connected with the negative electrode of the power supply; the other end of the fourth resistor is connected with the positive electrode of the power supply.

6. The circuit of claim 5, wherein the comparison circuit comprises a voltage comparator and a transistor;

the positive input end of the voltage comparator is used for inputting the sum of the first signal and the second signal; the reverse input end of the voltage comparator is used for inputting the target clock signal; the output end of the voltage comparator is connected with the base electrode of the triode;

when the sum of the first signal and the second signal is within the range of the preset signal threshold value, the emitter of the triode outputs an output clock signal with the same frequency as the input clock signal, and the electromagnet input circuit and the electromagnet output current are determined to be normal.

7. The circuit of claim 6, wherein when the sum of the first signal and the second signal exceeds the predetermined signal threshold range, the emitter of the triode outputs a normally high level or a normally low level, and the electromagnet input current and the electromagnet output current are determined to be abnormal.

8. The circuit for detecting the current of the electromagnet of the magnetic-levitation train as recited in claim 5, further comprising: a first signal filter circuit and a second signal filter circuit; the first signal filtering circuit comprises a first capacitor and a fifth resistor; the second signal filtering circuit comprises a second capacitor and a sixth resistor; the capacitance values of the first capacitor and the second capacitor are the same, and the resistance values of the fifth resistor and the sixth resistor are the same;

one end of the fifth resistor is connected with the output end of the first operational amplifier; the other end of the fifth resistor and one end of the first capacitor are connected to a first connecting point, and the first connecting point outputs a filtered first signal; the other end of the first capacitor is connected with the positive electrode of the power supply;

one end of the sixth resistor is connected with the output end of the second operational amplifier; the other end of the sixth resistor and one end of the second capacitor are connected to a second connection point, and the second connection point outputs a filtered second signal; the other end of the second capacitor is connected with the negative electrode of the power supply;

and the first connection point and the second connection point are connected and then connected with a positive input end of the voltage comparator, and the first connection point and the second connection point are connected and used for obtaining the sum of the filtered first signal and the filtered second signal.

9. The circuit for detecting current of an electromagnet of a magnetic-levitation train as recited in claim 8, further comprising: a third signal filter circuit; the third signal filtering circuit comprises a third capacitor;

one end of the third capacitor is connected with the positive input end of the voltage comparator; the other end of the third capacitor is connected with the reverse input end of the voltage comparator.

10. A magnetic-levitation train, characterized in that the magnetic-levitation train comprises a magnetic-levitation train electromagnet current detection circuit according to any one of claims 1-9.

Background

An electromagnet is arranged on a supporting arm of the magnetic suspension train, and a linear motor stator is horizontally arranged at a relative position on a track. The control system controls the magnitude and direction of the levitation force and the traction force by controlling the magnitude and direction of the current of the electromagnet and the stator coil of the linear motor, so that the maglev train can operate in suspension.

In general, a case where the current flowing into the electromagnet and the current flowing out of the electromagnet do not match is regarded as an abnormal case, and this abnormal case causes a problem of train safety such as unstable operation of the magnetic levitation train. Therefore, when a current is required to flow normally through the electromagnet, it is necessary to detect the current flowing into the electromagnet and the current flowing out of the electromagnet.

At present, after electromagnet current is collected, whether the electromagnet current is normal or not is detected in a software mode. However, software generally has a high failure rate and a low reliability of a detection result.

Disclosure of Invention

In order to solve the technical problem, the application provides a magnetic-levitation train electromagnet current detection circuit and a magnetic-levitation train, which are used for accurately detecting the reliability of the current of the magnetic-levitation train.

In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:

the embodiment of the application provides a maglev train electro-magnet current detection circuit, its characterized in that, the circuit includes: a forward circuit, a reverse circuit and a comparison circuit;

the forward circuit is used for carrying out positive value taking processing on an input first analog signal and outputting a first signal;

the reverse circuit is used for carrying out inversion value processing on the input second analog signal and outputting a second signal;

the first analog signal is electromagnet input current, and the second analog signal is electromagnet output current, or the first analog signal is the electromagnet output current, and the second analog signal is the electromagnet input current;

the comparison circuit is used for determining that the electromagnet input current and the electromagnet output current are normal when the sum of the first signal and the second signal is within a preset signal threshold range.

Optionally, the forward circuit comprises a first operational amplifier;

the first analog signal is input to a positive input end of the first operational amplifier; the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier; the output end of the first operational amplifier outputs the first signal.

Optionally, the inverting circuit comprises a second operational amplifier;

the second analog signal is input to an inverting input end of the second operational amplifier; the positive input end of the second operational amplifier is grounded; the inverting input end of the second operational amplifier is connected with the output end of the second operational amplifier through a first resistor; the output end of the second operational amplifier outputs the second signal;

the output end of the first operational amplifier is connected with the output end of the second operational amplifier and then is connected with the positive input end of the comparison circuit; the reverse input end of the comparison circuit inputs the preset signal threshold range; the output end of the first operational amplifier and the output end of the second operational amplifier are connected for obtaining the sum of the first signal and the second signal.

Optionally, the circuit further includes: a threshold generation circuit;

the threshold generation circuit is used for generating a target clock signal through an input clock signal; the threshold range of the target clock signal is the preset signal threshold range; the comparison circuit is used for comparing the preset signal threshold range with the sum of the first signal and the second signal.

Optionally, the threshold generation circuit includes a second resistor, a third resistor, and a fourth resistor; the third resistor and the fourth resistor have the same resistance value;

one end of the second resistor is connected to the input clock signal; the other end of the second resistor, one end of the third resistor and one end of the fourth resistor are connected and then connected with the reverse input end of the comparison circuit, and the other end of the second resistor, one end of the third resistor and one end of the fourth resistor are connected and used for obtaining the target clock signal; the other end of the third resistor is connected with the negative electrode of the power supply; the other end of the fourth resistor is connected with the positive electrode of the power supply.

Optionally, the comparison circuit includes a voltage comparator and a triode;

the positive input end of the voltage comparator is used for inputting the sum of the first signal and the second signal; the reverse input end of the voltage comparator is used for inputting the target clock signal; the output end of the voltage comparator is connected with the base electrode of the triode;

when the sum of the first signal and the second signal is within the range of the preset signal threshold value, the emitter of the triode outputs an output clock signal with the same frequency as the input clock signal, and the electromagnet input circuit and the electromagnet output current are determined to be normal.

Optionally, when the sum of the first signal and the second signal exceeds the preset signal threshold range, the emitter of the triode outputs a normally high level or a normally low level, and it is determined that the input current of the electromagnet and the output current of the electromagnet are abnormal.

Optionally, the circuit further includes: a first signal filter circuit and a second signal filter circuit; the first signal filtering circuit comprises a first capacitor and a fifth resistor; the second signal filtering circuit comprises a second capacitor and a sixth resistor; the capacitance values of the first capacitor and the second capacitor are the same, and the resistance values of the fifth resistor and the sixth resistor are the same;

one end of the fifth resistor is connected with the output end of the first operational amplifier; the other end of the fifth resistor and one end of the first capacitor are connected to a first connecting point, and the first connecting point outputs a filtered first signal; the other end of the first capacitor is connected with the positive electrode of the power supply;

one end of the sixth resistor is connected with the output end of the second operational amplifier; the other end of the sixth resistor and one end of the second capacitor are connected to a second connection point, and the second connection point outputs a filtered second signal; the other end of the second capacitor is connected with the negative electrode of the power supply;

and the first connection point and the second connection point are connected and then connected with a positive input end of the voltage comparator, and the first connection point and the second connection point are connected and used for obtaining the sum of the filtered first signal and the filtered second signal.

Optionally, the circuit further includes: a third signal filter circuit; the third signal filtering circuit comprises a third capacitor;

one end of the third capacitor is connected with the positive input end of the voltage comparator; the other end of the third capacitor is connected with the reverse input end of the voltage comparator.

The embodiment of the application also provides a magnetic-levitation train, which comprises the magnetic-levitation train electromagnet current detection circuit.

According to the technical scheme, the method has the following beneficial effects:

the embodiment of the application provides a maglev train electromagnet current detection circuitry and maglev train, the circuit includes: a forward circuit, a reverse circuit and a comparison circuit. The forward circuit is used for carrying out positive value taking processing on an input first analog signal and outputting a first signal. The inverting circuit is used for carrying out inversion value processing on the input second analog signal and outputting a second signal. The first analog signal is the electromagnet input current, the second analog signal is the electromagnet output current, or the first analog signal is the electromagnet output current, and the second analog signal is the electromagnet input current. The comparison circuit is used for determining that the input current of the electromagnet and the output current of the electromagnet are normal when the sum of the first signal and the second signal is within a preset signal threshold range. Through the detection form of the hardware circuit, whether the input current and the output current of the electromagnet of the magnetic suspension train are consistent or not can be accurately detected, and whether the current of the electromagnet is reliable or not is further determined.

Drawings

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

Fig. 1 is a schematic structural diagram of a current detection circuit of an electromagnet of a magnetic levitation train according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another current detection circuit for an electromagnet of a maglev train according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another current detection circuit for an electromagnet of a maglev train according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a specific circuit structure of a current detection circuit of a maglev train electromagnet provided in an embodiment of the present application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a current detection circuit of an electromagnet of a magnetic levitation train according to an embodiment of the present application. As shown in fig. 1, the current detection circuit of the electromagnet of the magnetic suspension train comprises a forward circuit 10, a reverse circuit 20 and a comparison circuit 30.

The first analog signal is input to the forward circuit 10, and the forward circuit 10 performs a positive value process on the input first analog signal and outputs a first signal.

The second analog signal is input to the inverter circuit 20, and the inverter circuit 20 performs inversion processing on the input second analog signal and outputs a second signal.

The first analog signal is the electromagnet input current, the second analog signal is the electromagnet output current, or the first analog signal is the electromagnet output current, and the second analog signal is the electromagnet input current. As an example, the first signal and the second signal are both voltage signals.

As an example, the forward circuit 10 includes a first operational amplifier.

As an example, the inverter circuit 20 includes a second operational amplifier.

After obtaining the first signal and the second signal, a sum of the first signal and the second signal is further obtained. The comparison circuit 30 is configured to determine a magnitude relationship between a sum of the first signal and the second signal and a preset signal threshold range, and determine that the input current and the output current of the electromagnet are normal when the sum of the first signal and the second signal is within the preset signal threshold range.

As an example, the comparison circuit 30 includes a voltage comparator and a transistor.

It will be appreciated that when the first analog signal is the electromagnet input current and the second analog signal is the electromagnet output current. If the input current and the output current of the electromagnet are normal, the input current and the output current of the electromagnet have the same current magnitude, namely the first analog signal and the second analog signal have the same numerical value. When the forward circuit 10 takes the positive of the first analog signal and the backward circuit 20 takes the negative of the second analog signal, the obtained first signal is positive and the second signal is negative. If the input current and the output current of the electromagnet are normal, and the first signal and the second signal are both voltage signals, the sum of the first signal and the second signal is maintained to fluctuate within the range of about 0V.

As an example, the preset signal threshold range is + -590 mv.

Through the magnetic-levitation train electromagnet current detection circuit that this application embodiment provided, detection circuitry includes: a forward circuit, a reverse circuit and a comparison circuit. The forward circuit is used for carrying out positive value taking processing on an input first analog signal and outputting a first signal. The inverting circuit is used for carrying out inversion value processing on the input second analog signal and outputting a second signal. The first analog signal is the electromagnet input current, the second analog signal is the electromagnet output current, or the first analog signal is the electromagnet output current, and the second analog signal is the electromagnet input current. The comparison circuit is used for determining that the input current of the electromagnet and the output current of the electromagnet are normal when the sum of the first signal and the second signal is within a preset signal threshold range. Through the detection form of the hardware circuit, whether the input current and the output current of the electromagnet of the magnetic suspension train are consistent or not can be accurately detected, and whether the current of the electromagnet is reliable or not is further determined.

Referring to fig. 2, fig. 2 is a schematic structural diagram of another current detection circuit for a maglev train electromagnet according to an embodiment of the present disclosure. As shown in fig. 2, the current detection circuit for the electromagnet of the magnetic-levitation train provided by the embodiment of the present application further includes a threshold generation circuit 40.

The threshold generating circuit 40 is configured to generate a target clock signal by inputting a clock signal, wherein a threshold range of the target clock signal is a preset signal threshold range.

After the threshold generation circuit 40 generates the target clock signal, the target clock signal is input to the comparison circuit 30. The comparison circuit 30 compares the magnitude relationship between the preset signal threshold range of the target clock signal and the sum of the first signal and the second signal, and determines that the input current and the output current of the electromagnet are normal when the sum of the first signal and the second signal is within the preset signal threshold range.

As an example, the input clock signal is a square wave signal having an amplitude of ± 15V.

As an example, the threshold generation circuit 40 is composed of a plurality of resistors, and generates the target clock signal by means of resistor voltage division based on the input clock signal.

It should be noted that, in the embodiment of the present application, reference may be made to the foregoing embodiment for related descriptions of the forward circuit 10, the backward circuit 20, and the comparison circuit 30, which are not described herein again.

The embodiment of the application designs a forward circuit, a reverse circuit, a threshold generating circuit and a comparison circuit, and can accurately detect whether the input current and the output current of the electromagnet of the magnetic suspension train are consistent through the detection form of a hardware circuit, so as to determine whether the current of the electromagnet is reliable.

Referring to fig. 3, fig. 3 is a schematic structural diagram of another current detection circuit for a maglev train electromagnet according to an embodiment of the present disclosure. As shown in fig. 3, the current detection circuit for a maglev train electromagnet provided in the embodiment of the present application further includes a first signal filter circuit 50, a second signal filter circuit 60, and a third signal filter circuit 70.

The first signal filter circuit 50 is configured to perform filtering processing on an input first signal to generate a filtered first signal.

The second signal filter circuit 60 is configured to perform filtering processing on the input second signal to generate a filtered second signal.

A sum of the filtered first signal and the filtered second signal is obtained, and the third signal filtering circuit 70 is configured to filter the sum of the filtered first signal and the filtered second signal, output a filtered output signal, and input the filtered output signal to the comparing circuit 30. The third signal filtering circuit 70 is further configured to filter the target clock signal generated by the threshold generating circuit 40 and output the filtered target clock signal. The filtered target clock signal is input to the comparator circuit 30. The comparator circuit 30 is configured to determine that the electromagnet input current and the electromagnet output current are normal when the filtered output signal is within a preset signal threshold range of the filtered target clock signal.

As an example, the first signal filter circuit 50 and the second signal filter circuit 60 are each composed of a resistor and a capacitor.

As an example, the third signal filtering circuit 70 is composed of a capacitor.

It should be noted that, in the embodiment of the present application, for the description of the forward circuit 10, the backward circuit 20, the comparing circuit 30 and the threshold generating circuit 40, reference may be made to the foregoing embodiment, and details are not described here.

The embodiment of the application designs a forward circuit, a reverse circuit, a threshold generating circuit, a comparison circuit, a first signal filter circuit, a second signal filter circuit and a third signal filter circuit. Through the detection form of the hardware circuit, whether the input current and the output current of the electromagnet of the magnetic suspension train are consistent or not can be accurately detected, and whether the current of the electromagnet is reliable or not is further determined.

Referring to fig. 4, fig. 4 is a schematic diagram of a specific circuit structure of a current detection circuit of a maglev train electromagnet provided in the embodiment of the present application. Fig. 4 is a specific circuit implementation of the structure shown in fig. 3.

As shown in fig. 4, the forward circuit 10 includes a first operational amplifier IC1, and the backward circuit 20 includes a second operational amplifier IC 2. The comparator circuit 30 includes a voltage comparator IC3 and a transistor.

The first analog signal is input to the positive input of the first operational amplifier IC1 (i.e., pin 3 of IC1 shown). The inverting input of the first operational amplifier IC1 (i.e., the 2 pin of the illustrated IC 1) is connected to the output of the first operational amplifier IC1 (i.e., the 1 pin of the illustrated IC 1). The output of the first operational amplifier IC1 outputs a first signal. As an example, the first operational amplifier IC1 may select the AD822 chip.

The second analog signal is input to the inverting input of a second operational amplifier IC2 (i.e., the 2 pin of IC2 is shown). The positive input of the second operational amplifier IC2 (i.e., the 3 pin of the illustrated IC 2) is coupled to ground. The inverting input of the second operational amplifier IC2 is connected to the output of the second operational amplifier IC2 (i.e., pin 1 of the illustrated IC 2) through a first resistor R1. The output of the second operational amplifier IC2 outputs a second signal. As an example, the second operational amplifier IC2 may select the AD822 chip.

The first signal filter circuit 50 includes a first capacitor C1 and a fifth resistor R5, and the second signal filter circuit 60 includes a second capacitor C2 and a sixth resistor R6. The capacitance values of the first capacitor C1 and the second capacitor C2 are the same, and the resistance values of the fifth resistor R5 and the sixth resistor R6 are the same.

One end of the fifth resistor R5 is connected to the output terminal of the first operational amplifier IC 1. The other end of the fifth resistor R5 and one end of the first capacitor C1 are connected to a first connection point a, which outputs the filtered first signal. The other end of the first capacitor C1 is connected to the positive supply (+ 10V).

One end of the sixth resistor R6 is connected to the output terminal of the second operational amplifier IC 2. The other end of the sixth resistor R6 and one end of the second capacitor C2 are connected to a second connection point B, which outputs a filtered second signal. The other end of the second capacitor C2 is connected with the negative pole (-10V) of the power supply.

The first connection point a and the second connection point B are connected to a positive input terminal (i.e., the 2 pin of the illustrated IC 3) of the voltage comparator IC3, and are connected to obtain a sum of the filtered first signal and the filtered second signal.

The threshold generation circuit 40 includes a second resistor R2, a third resistor R3, and a fourth resistor R4. The third resistor R3 and the fourth resistor R4 have the same resistance.

One end of the second resistor R2 is connected to the input clock signal. The other end of the second resistor R2, one end of the third resistor R3 and one end of the fourth resistor R4 are connected and then connected to the inverting input terminal of the comparator circuit 30, and the other end of the second resistor R2, one end of the third resistor R3 and one end of the fourth resistor R4 are connected to obtain the target clock signal. The other end of the third resistor R3 is connected with the negative pole (-10V) of the power supply; the other end of the fourth resistor R4 is connected to the positive supply (+ 10V).

The third signal filtering circuit 70 includes a third capacitor C3. One end of the third capacitor C3 is connected to the positive input terminal of the voltage comparator IC 3. The other end of the third capacitor C3 is connected to the inverting input of the voltage comparator (i.e., pin 3 of the illustrated IC 3). The third capacitor C3 is used for filtering the sum of the first filtered signal and the second filtered signal, and outputting a filtered output signal, which is then input to the positive input terminal of the comparator circuit 30 (i.e., the positive input terminal of the voltage comparator IC 3). The third signal filtering circuit 70 is further configured to filter the target clock signal and output a filtered target clock signal. The filtered target clock signal is then input to the inverting input of comparator circuit 30 (i.e., the inverting input of voltage comparator IC 3).

The positive input of voltage comparator IC3 is used to input the filtered output signal. The inverting input of voltage comparator IC3 is used for the filtered input target clock signal. The output of the voltage comparator (i.e., pin 3 of the illustrated IC 3) is connected to the base of the transistor. The emitter of the triode (i.e. the 1 pin of the illustrated triode) is connected with the seventh resistor, and the collector of the triode is connected with the positive electrode of the +15V power supply.

When the sum of the first signal and the second signal is within the preset signal threshold range of the filtered target clock signal, the emitter of the triode outputs an output clock signal with the same frequency as the input clock signal, and the input current of the electromagnet and the output current of the electromagnet are determined to be normal.

When the sum of the first signal and the second signal exceeds a preset signal threshold range, the emitter of the triode outputs a normally high level or a normally low level, and the input current of the electromagnet and the output current of the electromagnet are determined to be abnormal. Specifically, when the sum of the first signal and the second signal is higher than the preset signal threshold range, the emitter of the triode outputs a normally high level. When the sum of the first signal and the second signal is lower than a preset signal threshold range, the emitter of the triode outputs a normally low level.

It should be noted that the output terminal of the first operational amplifier IC1 and the output terminal of the second operational amplifier IC2 may be connected to the positive input terminal of the comparator circuit 30 (i.e., the positive input terminal of the voltage comparator IC 3). The inverting input terminal (the inverting input terminal of the voltage comparator IC 3) of the comparison circuit 30 inputs the target clock signal, and the threshold range of the target clock signal is the preset signal threshold range. The output of the first operational amplifier IC1 and the output of the second operational amplifier IC2 are connected to obtain the sum of the first signal and the second signal. The comparison circuit 30 may directly compare the sum of the input first signal and the input second signal with a preset signal threshold range, and determine that the input current of the electromagnet and the output current of the electromagnet are normal when the sum of the first signal and the second signal is within the preset signal threshold range.

In some embodiments, the forward circuit 10 is configured to perform scaling and positive value taking on the first analog signal. The inverter circuit 20 is used for scaling and negating the second analog signal. Wherein the scaling of the first analog signal by the forward circuit 10 and the scaling of the second analog signal by the backward circuit 20 are the same.

The circuit is realized through a forward circuit, a reverse circuit, a threshold generating circuit, a comparison circuit, a first signal filter circuit, a second signal filter circuit and a third signal filter circuit. The detection form of the hardware circuit can accurately detect whether the input current and the output current of the electromagnet of the magnetic suspension train are consistent, and further determine whether the current of the electromagnet is reliable.

The embodiment of the application also provides a magnetic-levitation train, which comprises the magnetic-levitation train electromagnet current detection circuit. The detailed structure of the current detection circuit of the electromagnet of the magnetic-levitation train can refer to the above embodiments, and is not described herein again. It can be understood that, the magnetic-levitation train of the embodiment of the present application uses the above-mentioned magnetic-levitation train electromagnet current detection circuit. Therefore, the embodiment of the maglev train provided by the embodiment of the application includes all technical solutions of all embodiments of the current detection circuit of the electromagnet of the maglev train, and the achieved technical effects are also completely the same, and are not repeated herein.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The method disclosed by the embodiment corresponds to the system disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the system part for description.

It should also 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, method, 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, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.