CN218068120U - Fault recognition device and system for multi-path alternating current equipment - Google Patents

Abstract

The utility model provides a trouble recognition device and system of multichannel interchange equipment, this trouble recognition device are applied to and fill electric pile, and this trouble recognition device includes: a magnetic component and an acquisition module; a plurality of coils with different numbers of turns are wound on the magnetic component; the plurality of coils include a first coil and a plurality of second coils; the plurality of first coils are used for being correspondingly connected with the multi-path alternating current equipment; the acquisition module is connected with the second coil. Adopt the utility model discloses can alleviate the higher and more complicated problem of circuit of cost that exists in the current AC equipment fault detection technique.

Description

Fault recognition device and system for multi-path alternating current equipment

Technical Field

The utility model belongs to the technical field of the fault identification technique and specifically relates to a fault identification device and system of multichannel interchange equipment are related to.

Background

At present, in filling electric pile's rack, need set up multichannel interchange equipment usually in order to guarantee the realization effect of a certain function, when certain interchange equipment broke down, often need consume a large amount of manpower and material resources and be difficult to directly discern the interchange equipment that broke down from multichannel interchange equipment that the precision.

In the existing fault detection technology for the alternating current equipment, a detection circuit needs to be added inside the alternating current equipment to output a feedback signal externally, so that the purpose of fault detection is achieved. This approach adds both cost and circuit complexity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a trouble recognition device and system of multichannel interchange equipment to alleviate the higher and more complicated problem of circuit of cost that exists among the current interchange equipment fault detection technique.

In a first aspect, the utility model provides a trouble recognition device of multichannel AC equipment, trouble recognition device is applied to and fills electric pile, trouble recognition device includes: a magnetic component and an acquisition module; a plurality of coils with different numbers of turns are wound on the magnetic component; the plurality of coils includes a plurality of first coils and a second coil; the plurality of first coils are used for being correspondingly connected with the multi-path alternating current equipment; the acquisition module is connected with the second coil.

As a possible implementation, the fault is an open circuit; the alternating current equipment is an alternating current fan.

As a possible implementation, the acquisition module comprises a single chip microcomputer and a sampling resistor; the sampling resistor is respectively connected with the second coil and the single chip microcomputer.

As a possible implementation, the acquisition module further comprises a differential amplification circuit; the single chip microcomputer is provided with an ADC (analog to digital converter) interface; and the differential amplifying circuit is respectively connected with the sampling resistor and the ADC interface.

As a possible implementation, the fault identification device further comprises a power supply module; the power module is respectively connected with the single chip microcomputer and the differential amplification circuit.

As a possible realization, the number of the first coils is two or three.

As a possible implementation, the magnetic component is a magnetic ring, and if the number of the first coils is two, the turn ratio of the two first coils is 1; if the number of the first coils is three, the turn ratio of the three first coils is 1.

As a possible implementation, the winding directions of the plurality of first coils are the same, and the acquisition module is configured to detect voltages corresponding to the magnetic field strengths that are superimposed with each other and correspond to the plurality of first coils.

As a possible implementation, if the number of the first coils is two and the winding directions of the coils are opposite, the acquisition module is configured to detect voltages corresponding to magnetic field strengths that are mutually reduced and correspond to the two first coils.

In a second aspect, the present invention provides a fault identification system for a multi-path ac device, the fault identification system includes the above fault identification device and a control circuit of a charging pile; the fault recognition device is connected with the control circuit.

The utility model provides a pair of trouble recognition device and system of multichannel AC equipment, this trouble recognition device are applied to and fill electric pile, and this trouble recognition device includes: a magnetic component and an acquisition module; a plurality of coils with different numbers of turns are wound on the magnetic component; the plurality of coils includes a plurality of first coils and a second coil; the plurality of first coils are used for being correspondingly connected with the multi-path alternating current equipment; the acquisition module is connected with the second coil. By adopting the technology, when a certain path of alternating current equipment breaks down, the broken-down path of alternating current equipment can be determined according to the change condition of the abnormal value currently acquired by the acquisition module relative to the normal value and the turn number of the corresponding first coil of each path of alternating current equipment, so that the problems of high cost and complex circuit existing in the existing alternating current equipment fault detection technology are solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a fault identification apparatus of a multi-path communication device in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fault recognition device of another multi-path communication apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fault recognition device of another multi-path ac equipment according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fault recognition device of another multi-path communication apparatus according to an embodiment of the present invention;

fig. 5 is a diagram illustrating an exemplary structure of a fault identification device of a multi-path ac apparatus according to an embodiment of the present invention;

fig. 6 is an exemplary diagram of a fault identification process of the multi-path ac fan according to the embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

At present, in the existing ac equipment fault detection technology, a detection circuit needs to be added inside the ac equipment to output a feedback signal externally, so as to achieve the purpose of fault detection. This approach adds both cost and circuit complexity. Based on this, the utility model provides a trouble recognition device and system of multichannel exchange equipment can alleviate the higher and more complicated problem of circuit of cost that exists in the current exchange equipment fault detection technique.

For convenience of understanding, the fault identification device of the multi-channel ac equipment provided by the embodiments of the present invention is first described.

Referring to fig. 1, a schematic structural diagram of a fault recognition device of a multi-channel ac device is shown, the fault recognition device is applied to a charging pile, and the fault recognition device includes: a magnetic component 100 and an acquisition module 200; a plurality of coils having different numbers of turns are wound around the magnetic member 100, and the plurality of coils include a plurality of first coils 101 and a second coil 102; the plurality of first coils 101 are used for being correspondingly connected with the multi-path alternating current equipment 400; the acquisition module 200 is connected to the second coil 102.

In fig. 1, after each first coil 101 is connected to one ac device 400, an external ac power source is used to supply power to each ac device 400 corresponding to the first coil 101, and the magnetic component 100 generates a magnetic field passing through the second coil 102 near each first coil 101, so that the direction and intensity of the total magnetic field passing through the second coil 102 are the result of interaction between the magnetic fields corresponding to different first coils 101; the current or voltage of the second coil 12 is collected by the collection module 200, because the abnormal current or abnormal voltage (i.e. abnormal value) collected by the collection module 200 when a certain path of ac equipment 400 fails is different from the normal current or normal voltage (i.e. normal value) collected by the collection module 200 when each path of ac equipment 400 is normal, the magnitude of the normal value and the magnitude of the abnormal value are actually determined by the magnitude of the current of each path of ac equipment 400, and the direction and the strength of the magnetic field corresponding to each first coil 101 are respectively related to the winding direction and the number of turns of the first coil 101, according to the ampere-turn balance principle, the ratio between the abnormal value and the normal value and the turn ratio of different first coils 101 can be respectively calculated, and the first coil 101 corresponding to the ratio can be found out according to the turn ratio, so as to determine that the path of ac equipment 400 corresponding to the first coil 101 fails.

The utility model provides a pair of multichannel AC equipment's fault identification device, this fault identification device are applied to and fill electric pile, and this fault identification device includes: a magnetic component and an acquisition module; a plurality of coils with different numbers of turns are wound on the magnetic component; the plurality of coils includes a plurality of first coils and a second coil; the plurality of first coils are used for being correspondingly connected with the multi-path alternating current equipment; the acquisition module is connected with the second coil. By adopting the technology, when a certain path of alternating current equipment breaks down, the broken-down path of alternating current equipment can be determined according to the change condition of the abnormal value currently acquired by the acquisition module relative to the normal value and the turn number of the corresponding first coil of each path of alternating current equipment, so that the problems of high cost and complex circuit existing in the existing alternating current equipment fault detection technology are solved.

As a possible implementation, referring to fig. 2, the acquisition module 200 may include a single chip 201 and a sampling resistor 202; the sampling resistor 202 is respectively connected with the second coil 102 and the singlechip 201.

The connection mode of the sampling resistor 202 and the second coil 102 may be in series or in parallel. Taking the sampling resistor 202 and the second coil 102 connected in series as an example, after each first coil 101 is correspondingly connected to one path of the ac device 400 and each path of the ac device 400 is supplied with power by using an external ac power supply, the current of the second coil 102 is limited by the sampling resistor 202 and the limited current is transmitted to the single chip microcomputer 201, so that the current of the second coil 102 is obtained at the end of the single chip microcomputer 201. Taking the sampling resistor 202 and the second coil 102 connected in parallel as an example, after each first coil 101 is correspondingly connected to one path of the ac device 400 and an external ac power supply is used to supply power to each path of the ac device 400, the current of the second coil 102 is shunted by the sampling resistor 202 and the shunted current is converted into voltage to be transmitted to the single chip 201, so that the voltage of the second coil 102 is obtained at the end of the single chip 201. The stability of the current or voltage collected by the second coil 102 at the end of the single chip microcomputer 201 can be further improved by the arrangement of the sampling resistor 202.

As a possible implementation, referring to fig. 3, the acquisition module 200 may further include a differential amplification circuit 203; the single chip microcomputer 201 is provided with an ADC interface 2011; the differential amplifier circuit 203 is connected to the sampling resistor 202 and the ADC interface 2011. After the current of the second coil 102 is processed by the sampling resistor 202, the current is also amplified by the differential amplifying circuit 203, and then is received by the single chip microcomputer 201 through the ADC interface 2011, so that the current or voltage of the second coil 102 is obtained at the end of the single chip microcomputer 201. The arrangement of the differential amplifying circuit 203 can further improve the accuracy of the current or voltage of the second coil 102 collected by the single chip 201.

As a possible embodiment, referring to fig. 3, the fault recognition apparatus may further include a power module 300; the power module 300 is respectively connected with the single chip 201 and the differential amplifying circuit 203. The power module 300 can be used for respectively supplying power to the singlechip 201 and the differential amplification circuit 203 in the device.

As a possible embodiment, the shape of the magnetic member may be a ring shape, a japanese shape, a square shape, an EE shape, etc., and may be flexibly set according to actual needs, which is not limited.

As a possible implementation, the fault may be an open circuit; the alternating current equipment can be an alternating current fan. The ac device may be another ac device in which the current is stable during operation and is disconnected during a fault, and is not limited thereto.

As a possible implementation manner, the fault may be other faults besides an open circuit, such as a short circuit fault, an overload, a poor contact, a circuit connection error, a line leakage, and the like, and may be specifically defined according to actual conditions, which is not limited.

In a preferred embodiment, the number of the first coils may be two or three.

In a preferred embodiment, the magnetic member is a magnetic ring, and if the number of the first coils is two, the turn ratio of the two first coils is 1; if the number of the first coils is three, the turn ratio of the three first coils is 1.

In a preferred embodiment, the winding directions of the first coils are the same, and the acquisition module is configured to detect voltages corresponding to the magnetic field strengths superimposed on each other corresponding to the first coils.

As a possible embodiment, if the number of the first coils is two and the winding directions of the coils are opposite, the acquisition module is configured to detect a voltage corresponding to mutually subtracted magnetic field strengths corresponding to the two first coils.

For ease of understanding, the above-described fault identification apparatus is described herein with a specific example. Referring to fig. 4, the magnetic component is annular, that is, the magnetic component is a magnetic ring, and N +1 coils with different numbers of turns and the same winding direction are wound on the magnetic ring and are respectively represented by coils 0 to N; the coils 1 to N are respectively used for being correspondingly connected with the fans 1 to N one by one through respective interfaces of the fans 1 to N; the coil 0 is connected with a sampling resistor in parallel; the sampling resistor is connected with a differential amplifier in parallel; the differential amplifier is connected with an ADC interface of a single chip microcomputer; the power module is respectively connected with the differential amplifier and the single chip microcomputer. In fig. 4, the single chip microcomputer and the differential amplifier are powered by the power supply module, 220VAC alternating currents are used for simultaneously powering the fans 1 to N, the magnetic rings correspondingly generate corresponding magnetic fields near the coils 1 to N, so that N magnetic fields penetrating through the coil 0 are obtained, and the N magnetic fields are superposed to form a total magnetic field penetrating through the coil 0; the current of the coil 0 is converted into voltage through the sampling resistor, the converted voltage is amplified through the differential amplifier, and then the amplified voltage is received by the ADC interface of the single chip microcomputer, so that the voltage of the coil 0 is obtained at the end of the single chip microcomputer. When the fans 1 to N work normally, the single chip takes all voltage values received in the current sampling period as normal voltage values to be recorded; if a certain fan is broken at a certain later moment, the single chip takes the voltage value received in the sampling period after the moment as an abnormal voltage value to be recorded, the ratio between the abnormal voltage value and the normal voltage value is calculated, then the coil with the number of turns corresponding to the ratio is found out according to the calculated ratio and the turn ratio from the coil 1 to the coil N, and therefore the fan correspondingly connected with the coil is determined to be broken.

In addition, the number of coil windings of the magnetic ring and the coil turn ratio of the magnetic ring can be changed according to the number of the fans, and corresponding voltage values obtained by detection of the single chip microcomputer after the fans are respectively connected into the corresponding fans are made into a plurality of groups of tables, so that accurate detection of the fault fans can be realized in a mode of inquiring the plurality of groups of tables.

Exemplarily, taking fig. 5 as an example, 3 groups of coils (i.e., ls, L1, and L2) with different turns and the same winding direction are simultaneously wound on a toroidal magnetic core (i.e., a magnetic ring), and the turns of Ls, L1, and L2 are Ns, N1, and N2, respectively; the L1 and the alternating current fan M1 are connected in series to form a branch, the L2 and the alternating current fan M2 are connected in series to form another branch, and the two branches are connected in parallel; ls is connected with a sampling resistor R2 in parallel, and R2 is connected with a differential amplifying circuit in parallel; the differential amplifying circuit is connected with an ADC interface of a single chip microcomputer. Respectively supplying power to M1 and M2 simultaneously through 220VAC alternating current, wherein when the alternating current is in a positive half cycle, the direction of a magnetic field 1 generated by M1 current and the direction of a magnetic field 2 generated by M2 current are in a superposition state, so that the magnetic field passing through the Ls side is the sum of the magnetic fields of the L1 side and the L2 side; when the alternating current is in the negative half cycle, the direction of the magnetic field generated by the M1 current and the direction of the magnetic field generated by the M2 current are also in a superimposed state, and therefore the magnetic field passing through the Ls side is also the sum of the magnetic fields of the L1 side and the L2 side. The current at the Ls side is converted into voltage through R2, the voltage obtained through conversion is amplified through a differential amplification circuit, and then the voltage obtained through amplification is received through an ADC (analog to digital converter) interface of the single chip microcomputer, so that the voltage at the Ls side is obtained at the end of the single chip microcomputer.

Since the open circuit of the ac fan represents the change of the current, it can be determined which ac fan has a fault by detecting the magnitude of the induced voltage (or the magnitude of the induced current) on the Ls side. For example, when M1 fails open, the magnetic field passing through Ls is the magnetic field on the L2 side; when the M2 is in fault and is disconnected, the magnetic field passing through Ls is the magnetic field on the L1 side; when M1 and M2 work normally, the magnetic field passing through Ls Is the sum of the magnetic fields at the L1 side and the L2 side, and according to the ampere-turn balance principle, N1 × I + N2 × I = Ns × Is, wherein the current of the fan in normal work Is I, and the induction current of Ls Is; definition N2=2 × N1, and Is = (3 × N1 × I)/Ns when M1 and M2 operate normally; is = (2 XN 1 XI)/Ns when the M1 fault Is broken; in M2 failure, is = (N1 × I)/Ns. Because R2 Is connected with Ls in parallel, the change of Is shown as the change of the voltage value obtained by the single chip microcomputer, and therefore, which fan fails can be identified through the change of the voltage value detected by the single chip microcomputer.

Based on a circuit structure similar to that in fig. 5, when the number of the connected fans is 3, a turn ratio of coils corresponding to 3 fans can be defined as 1.

Illustratively, the fault recognition device may further include an alarm module connected to the single chip microcomputer, and configured to send an alarm signal to the outside after recognizing the path of ac equipment with the fault. Based on this, the fault recognition device can perform fault recognition on the multiple ac fans, and as shown in fig. 6, the fault recognition on the multiple ac fans may include the following processes:

step 1, starting a multi-path alternating current fan to radiate a cabinet of a charging pile.

And 2, acquiring a corresponding voltage value through the single chip microcomputer.

And 3, judging whether the current voltage value acquired by the single chip microcomputer is equal to the corresponding voltage value after the multi-path alternating current fan is connected into the circuit. If yes, the step 2 is returned to if no fan fails; if not, the fan is judged to have a fault, and step 4 is executed.

And step 4, determining that the fans are in failure, and sending out an alarm signal through an alarm module.

Based on the fault identification device of the multi-path alternating current equipment, the embodiment of the utility model also provides a fault identification system of the multi-path alternating current equipment, which comprises the fault identification device and a control circuit of a charging pile; the fault recognition device is connected with the control circuit. By adopting the fault identification system, the fault identification device can send corresponding alarm signals to the control circuit of the charging pile after identifying the fault alternating-current equipment, so that the control circuit can control the working state of the relevant equipment (such as the start and stop of the control equipment and the operation parameters of the regulation equipment) after receiving the alarm signals.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides a trouble recognition device of multichannel interchange equipment, trouble recognition device is applied to and fills electric pile, its characterized in that, trouble recognition device includes: the device comprises a magnetic component and an acquisition module; a plurality of coils with different numbers of turns are wound on the magnetic component; the plurality of coils includes a plurality of first coils and a second coil; the plurality of first coils are used for being correspondingly connected with the multi-path alternating current equipment; the acquisition module is connected with the second coil.

2. The fault identification device of claim 1, wherein the fault is an open circuit; the alternating current equipment is an alternating current fan.

3. The fault recognition device of claim 1, wherein the acquisition module comprises a single chip microcomputer and a sampling resistor; the sampling resistor is respectively connected with the second coil and the single chip microcomputer.

4. The fault recognition device of claim 3, wherein the acquisition module further comprises a differential amplification circuit; the single chip microcomputer is provided with an ADC (analog to digital converter) interface; and the differential amplifying circuit is respectively connected with the sampling resistor and the ADC interface.

5. The fault identification device of claim 4, further comprising a power module; and the power supply module is respectively connected with the single chip microcomputer and the differential amplification circuit.

6. The fault identification device of claim 1, wherein the number of the first coils is two or three.

7. The fault recognition device according to claim 6, wherein the magnetic member is a magnetic ring, and if the number of the first coils is two, the turn ratio of the two first coils is 1; if the number of the first coils is three, the turn ratio of the three first coils is 1.

8. The fault recognition device of claim 1, wherein the plurality of first coils are wound in the same direction, and the acquisition module is configured to detect a voltage corresponding to a magnetic field strength superimposed on each other corresponding to the plurality of first coils.

9. The fault identification device of claim 1, wherein if the number of the first coils is two and the winding directions of the coils are opposite, the acquisition module is configured to detect voltages corresponding to mutually reduced magnetic field strengths corresponding to the two first coils.

10. A fault recognition system for a multiple-way communication apparatus, the fault recognition system comprising a fault recognition device according to any one of claims 1 to 9 and a control circuit of a charging pile; the fault recognition device is connected with the control circuit.

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