Charging and magnetic protection switching device with multiple protection functions

Abstract

The utility model discloses a charging and magnetism-keeping switching device with multiple protection functions, and the device is characterized in that a three-phase power state detection module is connected with a full-control rectification module, and is used for obtaining an input three-phase AC electric signal; the first electromagnetic disc detection module is connected with a power supply circuit of the electromagnetic disc controller and is used for acquiring a current signal of the electromagnetic disc controller; the second electromagnetic disc detection module is connected with the magnetism-keeping input switch and is used for acquiring a voltage signal of the electromagnetic disc; and the main control module is used for sending a switching instruction for controlling the storage battery pack to the magnetism-keeping input switch in combination with the current signal and the voltage signal, and sending a storage battery pack charging power supply abnormity alarm in combination with the three-phase alternating current signal. The device can be used in cooperation with an electromagnetic disc controller to form a complete electromagnetic disc magnetic attraction and magnetic protection control system, the problem of attraction failure or magnetic attenuation caused by unstable power supply of the electromagnetic disc and damage of the electromagnetic disc controller is effectively avoided, and the operation safety and the equipment operation stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial automation technical field especially, relate to a kind of charging and magnetism maintaining switching device with multiple protection function. BACKGROUND

[0002] Electromagnetic disk is widely used in steel, port, machinery manufacturing and other fields by virtue of magnetic force adsorption characteristics, undertake the carrying operation of various metal materials. But the power supply stability requirement of electromagnetic disk is extremely high, if power failure suddenly and cannot effectively preserve magnetism, it is easy to cause material falling and other serious safety accidents, not only cause economic losses, more directly threaten the life safety of on-site operator. Therefore, the application site is equipped with electromagnetic disk protection device to deal with power failure situation.

[0003] Traditional electromagnetic disk power failure protection device is converted or disturbed by accident when crane working condition, because signal detection precision is insufficient, judgment logic is single, electromagnetic disk controller output fluctuation is easy to misjudge as abnormal, triggers unnecessary protection action (i.e. " misjudgment phenomenon "), not only influence operation process, also greatly reduce work efficiency. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of charging and magnetism maintaining switching device with multiple protection function to overcome the above technical problems.

[0005] In order to realize the above-mentioned purpose, the technical scheme of the utility model is:

[0006] A kind of charging and magnetism maintaining switching device with multiple protection function, comprising: full-control rectifier module, filter module, battery pack, magnetism preserving input switch, bleeder circuit, first electromagnetic disk detection module, second electromagnetic disk detection module, three-phase power supply state detection module and main control module;

[0007] The full-control rectifier module, filter module, battery pack, magnetism preserving input switch and bleeder circuit are sequentially connected;

[0008] The full-control rectifier module is connected with three-phase alternating current power supply, for converting input three-phase alternating current into direct current, and transmission to the filter module;

[0009] The filter module is used to filter input direct current;

[0010] The battery pack is used to power supply for electromagnetic disk;

[0011] The magnetism preserving input switch is connected in parallel to the two ends of electromagnetic disk, and is controlled by the main control module, for making battery pack power supply for electromagnetic disk;

[0012] The bleeder circuit is connected in parallel to the two ends of electromagnetic disk, for conducting when magnetism maintaining switching is completed or system shutdown, to release the magnetic energy stored in electromagnetic disk coil.

[0013] The three-phase power supply state detection module is connected with the full-control rectification module, and is configured to acquire an input three-phase alternating current signal and transmit the three-phase alternating current signal to the main control module;

[0014] The first electromagnetic disk detection module is connected with a power supply circuit of the electromagnetic disk controller, and is configured to acquire a current signal of the electromagnetic disk controller and transmit the current signal to the main control module;

[0015] The second electromagnetic disk detection module is connected with the magnetic field maintenance input switch, and is configured to acquire a voltage signal of the electromagnetic disk and transmit the voltage signal to the main control module;

[0016] The main control module is configured to send a switch instruction of the battery pack to the magnetic field maintenance input switch in combination with the current signal and the voltage signal, and send an abnormal alarm of a charging power supply of the battery pack in combination with the three-phase alternating current signal.

[0017] Further, the charging and magnetic field maintenance switching device further comprises a first battery pack detection module and a second battery pack detection module;

[0018] The first battery pack detection module is connected with the filter module and the battery pack respectively, and is configured to acquire a current signal of a charging loop of the battery pack and transmit the current signal to the main control module;

[0019] The second battery pack detection module is connected with the battery pack and the magnetic field maintenance input switch respectively, and is configured to acquire a voltage signal of the charging loop of the battery pack and transmit the voltage signal to the main control module;

[0020] The main control module is configured to send a charging fault alarm of the battery pack in combination with the current signal and the voltage signal of the charging loop of the battery pack.

[0021] Further, the first battery pack detection module comprises a first current transformer and a first current detection module;

[0022] The first current transformer is connected in series between the filter module and the battery pack, and is configured to convert a primary-side current signal into a secondary-side current signal and transmit the secondary-side current signal to the first current detection module;

[0023] The first current detection module is configured to convert an input signal into a digital signal and transmit the digital signal to the main control module.

[0024] Further, the first electromagnetic disk detection module comprises a second current transformer and a second current detection module;

[0025] The second current transformer is connected in series in a power supply circuit of the electromagnetic disk controller, and is configured to convert a primary-side current signal into a secondary-side current signal and transmit the secondary-side current signal to the second current detection module;

[0026] The second current detection module is configured to convert the input signal into a digital signal and transmit the digital signal to the main control module.

[0027] Further, the main control module sends a control switch instruction of the battery pack to the magnetic retention switch in combination with the current signal and the voltage signal.

[0028] When the voltage across the electromagnetic disc is lower than a set magnetic retention switch voltage and the current across the electromagnetic disc is lower than a set magnetic retention switch current, the main control module sends an opening instruction of the battery pack to the magnetic retention switch.

[0029] Further, the main control module is connected with the first battery pack detection module and the second battery pack detection module respectively, configured to receive a charging current signal and a charging voltage signal of a charging circuit of the battery pack and issue a first alarm signal or a second alarm signal; the first alarm signal is configured to control the display module to trigger a low battery voltage alarm when the charging voltage signal is lower than a set alarm voltage threshold; the second alarm signal is configured to control the display module to trigger a low battery capacity alarm when it is determined that the battery capacity is lower than a preset capacity threshold.

[0030] Further, the charging and magnetic retention switch device further comprises a display module, an instruction acquisition module and a communication module.

[0031] The display module is connected with the main control module, configured to receive the working state, parameter data and alarm information of the charging and magnetic retention switch device transmitted by the main control module and perform visual display.

[0032] The instruction acquisition module is connected with the main control module, configured to acquire external instructions and transmit the external instructions to the main control module, so that the main control module can perform corresponding operations according to the external instructions.

[0033] The communication module is connected with the main control module, configured to enable the main control module to interact with other modules in a data exchange manner through Ethernet communication.

[0034] Beneficial effects: the utility model discloses three -phase power state detection module to obtain the input three -phase ac signal, set up first electromagnetic disk detection module and second electromagnetic disk detection module, are used to obtain the current signal of electromagnetic disk controller and the voltage signal of electromagnetic disk respectively, and the main control module can send control battery group's switch instruction to the magnetic preservation input switch in combination with current signal and voltage signal, and sends the abnormal alarm of battery group charging power in combination with three -phase ac signal.The utility model discloses through to the optimization upgrade of charging function, magnetic preservation switching function, makes charging and magnetic preservation switching device possess more reliable function effect.The utility model discloses can cooperate with electromagnetic disk controller and use, constitutes the complete electromagnetic disk magnetism absorption, magnetic preservation control system, can effectively avoid the adsorption invalidity or magnetic attenuation problem that electromagnetic disk causes the power supply instability, electromagnetic disk controller damage leads to, promotes the operation safety and equipment operation stability in the scene such as industrial handling, processing. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will be to the drawing needed to use in the embodiment or prior art description a simple introduction, obviously, the drawing in the following description is some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor intensity, can also obtain other drawings according to these drawings.

[0036] Figure 1 It is the connection schematic diagram of charging and magnetic preservation switching device in the utility model;

[0037] Figure 2 It is the conversion circuit diagram of the magnetism absorption instruction in the utility model;

[0038] Figure 3 It is the circuit diagram of three -phase power state detection module in the utility model;

[0039] Figure 4 It is the direct current measurement circuit diagram of first battery group detection module and first electromagnetic disk detection module in the utility model;

[0040] Figure 5 It is the direct current voltage measurement circuit diagram of second battery group detection module and second electromagnetic disk detection module in the utility model. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described in the following with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0042] The embodiment provides a charging and magnet preserving switching device with multiple protection functions, which has functions such as battery pack charging, electromagnetic disc magnet preserving switching and fault triggering alarm. Figure 1 As shown in the figure, the charging and magnet preserving switching device comprises a full-control rectification module, a filtering module, a battery pack, a magnet preserving input switch, a discharge loop, a first electromagnetic disc detection module, a second electromagnetic disc detection module, a three-phase power supply state detection module and a main control module.

[0043] The full-control rectification module, the filtering module, the battery pack, the magnet preserving input switch and the discharge loop are sequentially connected.

[0044] The full-control rectification module is connected with a three-phase alternating current power supply, and is used to convert input three-phase alternating current into direct current and transmit the direct current to the filtering module.

[0045] The filtering module is used to filter input direct current.

[0046] Specifically, the filtering module is composed of an inductor and a capacitor, can filter and process the direct current after full-control rectification, reduce voltage fluctuation and electromagnetic interference, make the output direct current more stable, and guarantee stable operation of subsequent modules.

[0047] The battery pack is used to supply power to the electromagnetic disc.

[0048] Specifically, the battery pack is used as a standby power supply during power failure, stores electric energy when the electromagnetic disc is normally powered, provides electric energy for the electromagnetic disc magnet preservation during power failure, and guarantees that the electromagnetic disc can still maintain magnetic adsorption of materials after power failure.

[0049] The magnet preserving input switch is connected in parallel across the electromagnetic disc and is controlled by the main control module, and is used to make the battery pack supply power to the electromagnetic disc.

[0050] Specifically, the magnet preserving input switch (contactor KM2) is a control switch of the magnet preserving loop, is connected with the output end of the battery pack, the discharge loop and the electromagnetic disc, is disconnected when the electromagnetic disc is normally powered, is controlled to be closed by the main control module when the electromagnetic disc is powered off, and makes the electric energy of the battery pack be transmitted to the electromagnetic disc, so that magnet preservation during power failure is realized.

[0051] Specifically, the electromagnet is connected with the contactor KM2 and the contactor KM1 respectively, and the electromagnet generates a magnetic field to attract the material by current. The contactor KM1 is connected with the electromagnet and the electromagnet controller respectively, controls the on-off of the electromagnet and the external electromagnet controller, and realizes the switching of the electromagnet in different control scenarios. The electromagnet controller is connected with the contactor KM1, and is an external control unit of the electromagnet in a normal state.

[0052] The discharge circuit is connected in parallel with the electromagnet, is turned on after the magnetic field switching is completed or when the system is shut down, releases the magnetic energy stored in the electromagnet coil, and thus guarantees the safety of the operator and the equipment.

[0053] The three-phase power state detection module (as shown in the circuit diagram Figure 3 ) is connected with the full-control rectification module, is used for acquiring the input three-phase alternating current signal, and transmits the signal to the main control module.

[0054] Specifically, the three-phase power state detection module is connected with the full-control rectification module and the main control module, detects the state of the three-phase power to assist the main control module in judging the open-phase or phase sequence error fault, and is also responsible for controlling the trigger signal of the full-control rectification module. The circuit diagram of the three-phase power state detection module is as shown in Figure 3 After the three-phase AC 220V is divided by the resistor, it becomes UVW. After the voltage is divided, the voltage is converted from the alternating voltage signal to the square wave voltage signal by the voltage comparator U1.

[0055] The first electromagnet detection module is connected with the power supply circuit of the electromagnet controller, is used for acquiring the current signal of the electromagnet controller, and transmits the signal to the main control module.

[0056] The second electromagnet detection module is connected with the magnetic field maintaining input switch, is used for acquiring the voltage signal of the electromagnet, and transmits the signal to the main control module.

[0057] Specifically, the second electromagnet detection module (as shown in the circuit diagram Figure 5 ) is connected with the output end of the magnetic field maintaining input switch (the contactor KM2). Since the contactor KM2 is connected in parallel with the electromagnet, the voltage at the output end of the contactor KM2 is the voltage between the two ends of the electromagnet. Then, the voltage signal is processed and transmitted to the main control module, and is used for assisting the main control module in monitoring the voltage state of the magnetic field maintaining circuit to make a fault judgment.

[0058] Specifically, in the embodiment, after the device receives the magnetic attraction instruction, the second electromagnet detection module starts to monitor the voltage of the electromagnet. When there is no “initial fault” (i.e., the voltage reaches the set electromagnet voltage within the initial time) and the electromagnet is unexpectedly powered off, it is determined that a system fault occurs. At this time, the magnetic field switching process is triggered, including:

[0059] (1) stopping the current charging operation;

[0060] (2) In turn control the electromagnetic disk contactor KM1 is disconnected, the battery pack contactor KM2 is closed, the power supply circuit switching is realized;

[0061] (3) Turn into the power failure magnetism protection state, the battery pack is continuously powered for the electromagnetic disk, simultaneously output "system failure" signal;

[0062] (4) When the magnetism suction instruction disappears, the fault is automatically reset, KM1 contactor is closed, KM2 contactor is disconnected, and the device returns to the normal working state.

[0063] The main control module is used for sending a switch instruction of the battery pack to the magnetism protection input switch in combination with the current signal and the voltage signal, and issuing an abnormal alarm of the battery pack charging power source in combination with the three-phase alternating current signal.

[0064] Specifically, in the embodiment, a main control module with a safety early warning mechanism for crane magnetism protection application is constructed according to the obtained power parameters. Specifically, it refers to:

[0065] The main control module is connected with the first battery pack detection module and the second battery pack detection module respectively, and triggers the corresponding alarm in combination with the obtained power parameters, to ensure system safety, including:

[0066] After the main control module receives the charging current signal and the charging voltage signal of the battery pack charging circuit, the first alarm signal or the second alarm signal is issued;

[0067] Specifically, the first alarm signal is used to control the display module to trigger a low battery pack voltage alarm when the charging voltage signal is lower than the set alarm voltage threshold; and the second alarm signal is used to control the display module to trigger a low battery pack power alarm when it is determined that the battery pack power is lower than the preset power threshold.

[0068] Specifically, when the main control module determines that the charging voltage signal voltage rises to the required value, the display module ends the alarm.

[0069] The main control module can also issue a third alarm signal, which is used to control the display module to output a "charging power source failure" alarm when a power source open phase or phase sequence error is detected in combination with the three-phase alternating current signal, and to control the display module to end the alarm after the power source is restored.

[0070] The main control module can also issue a fourth alarm signal, which is used to control the display module to output a "start failure" alarm when the electromagnetic disk voltage does not reach the starting voltage within the starting time, and to control the display module to end the alarm after the magnetism suction instruction disappears.

[0071] Specifically, in the embodiment, the storage battery power warning function is realized by the storage battery monitoring module and the master control module. The storage battery monitoring module continuously collects the charging and discharging current signals of the storage battery, and performs regular integral processing on the current signals through the built-in metering unit, and outputs the cumulative charging ampere-hour and the cumulative discharging ampere-hour of the storage battery in real time. According to the charging ampere-hour and the discharging ampere-hour of the storage battery, a warning is given before the storage battery power can maintain the rated load for 10 minutes, so as to prevent battery over-discharge from causing battery damage, and also to avoid the material falling due to the insufficient magnetic force of the electromagnetic disc caused by the virtual battery.

[0072] Specifically, the embodiment determines the power maintenance time through the charging ampere-hour and the discharging ampere-hour of the storage battery, and timely issues a warning before the battery power is insufficient, so it can be said that one of the innovative points of the master control module of the utility model is not the newly designed ampere-hour integral algorithm, but the power data obtained directly by using the conventional integral algorithm, which is not used for ordinary power display, but is specially used to design an active triggering warning mechanism before the storage battery power is about to be exhausted to the critical point that may cause an accident (i.e. when the rated load can be maintained for a safe time), so as to avoid losing the magnetism maintaining ability due to insufficient capacity at the critical moment, and to ensure the safety of the equipment and personnel.

[0073] Specifically, the embodiment increases the monitoring mode of charging and discharging ampere-hour calculation on the basis of the traditional single voltage monitoring, and can accurately calculate the actual remaining power of the storage battery and the magnetism maintaining time. Even if the capacity of the storage battery decreases, the real power state can be provided for the operation and maintenance personnel, and a reminder can be given in advance before the power is exhausted, so that the storage battery can be stably maintained to a safe state when the electromagnetic disc is powered off, and the material falling accident caused by power misjudgment can be fundamentally eliminated. Through the battery monitoring method, the service life of the battery can be improved by more than 20%.

[0074] Specifically, under normal working conditions, the full-control rectification module is connected with the three-phase AC 220V alternating current power supply, and is used for converting the input three-phase alternating current into direct current and transmitting the direct current to the filter module; the filter module filters the input direct current and charges the storage battery, which can effectively reduce the charging voltage fluctuation; when the master control module detects that the three-phase power supply state detection module transmits a three-phase alternating current signal with missing phase or wrong phase sequence, an interrupt charging instruction will be immediately issued, and then the storage battery stops charging.

[0075] At the same time, the master control module realizes the automatic switching of the main charging and floating charging modes by collecting the charging current and the voltage across the battery of the storage battery.

[0076] Under normal working conditions, when the magnetism attracting instruction (circuit diagram as shown in Figure 2At a given time, the electromagnetic disc controller converts the three-phase AC 220V power into a direct current power, and supplies power to the electromagnetic disc through the main contact of the contactor KM1; when the attracting magnetic instruction is returned to zero, the electromagnetic disc controller stops outputting, and the electromagnetic disc completes energy discharge through the discharge circuit in the charging and magnetic maintenance switching device, at which time the battery pack is in a charging mode. When an abnormality occurs in the system, if the attracting magnetic instruction has been given, and the electromagnetic disc controller output is abnormal or the front-end three-phase AC 220V power is lost, at this time, the main control module in the charging and magnetic maintenance switching device will control the main contact of the contactor KM1 to be disconnected, at the same time, stop charging the battery pack, and control the magnetic maintenance input switch (contactor KM2) main contact to be closed, switching the power supply of the electromagnetic disc from the battery pack; after the attracting magnetic instruction is returned to zero, the main control module controls the main contact of the contactor KM2 to be disconnected, and the main contact of the contactor KM1 to be closed, at the same time, restores the charging function of the battery pack.

[0077] In specific embodiments, the charging and magnetic maintenance switching device further comprises a first battery pack detection module and a second battery pack detection module;

[0078] The first battery pack detection module (circuit diagram as shown in Figure 4 is connected with the filter module and the battery pack respectively, for obtaining the current signal of the charging circuit of the battery pack, and transmitting to the main control module;

[0079] The second battery pack detection module is connected with the battery pack and the magnetic maintenance input switch respectively, for obtaining the voltage signal of the charging circuit of the battery pack, and transmitting to the main control module, to assist the main control module in monitoring the power state of the battery pack, judging whether the battery is normal or not, and realizing intelligent alarm of the battery power.

[0080] Specifically, the second battery pack detection module is a Hall current sensor.

[0081] Specifically, the battery pack voltage monitoring and the electromagnetic disc voltage monitoring principles are consistent, V1 and V2 are converted from direct current signals to direct current signals after passing through the rectifier bridge, and then input the Hall current sensor to convert into the direct current voltage signal DC_V of the voltage sampling circuit, as shown in Figure 5 .

[0082] The main control module is used to issue a battery pack charging fault alarm in combination with the current signal and the voltage signal of the charging circuit of the battery pack.

[0083] Specifically, in this embodiment, the battery pack charging process performs a three-stage charging mode to maintain the battery pack power reserve, and the charging and discharging state is automatically switched according to the battery parameters, and the three-stage charging mode includes:

[0084] Constant current charging phase: the device charges the battery pack with a constant current in a main charging limit current mode when the device is powered on for the first time or the battery pack is discharged (for example, after the battery pack powers the electromagnetic disk), quickly replenishing the battery pack power, at this time, the battery pack voltage rises steadily;

[0085] Constant voltage charging phase: when the battery pack voltage reaches the main charging limit voltage, the control charging voltage remains unchanged, and the charging current gradually decreases to continuously supplement the remaining capacity of the battery pack;

[0086] Float charging phase: when the charging current is less than the main float charging switching current, the device continuously outputs a float limit voltage to maintain the full state of the battery pack with a small current, supplementing the self-discharge loss and prolonging the service life of the battery pack.

[0087] Specifically, the embodiment also provides a charging stop mechanism, that is, when the battery pack enters a discharging state (for example, when switching to a magnetic field maintaining mode or system failure), the device immediately stops charging to prioritize discharging requirements.

[0088] In specific embodiments, the first battery pack detection module includes a first current transformer and a first current detection module;

[0089] The first current transformer is connected in series between the filter module and the battery pack, and is used to convert a primary side current signal into a secondary side current signal and transmit it to the first current detection module;

[0090] The first current detection module is used to convert an input signal into a digital signal and transmit it to the main control module.

[0091] Specifically, in the embodiment, the first current transformer is a Hall current sensor, and the output end of the first current transformer is connected with the battery pack, which can accurately measure the charging current of the loop, convert the current signal into an electrical signal that can be recognized by the core of the main control module, and provide data support for the battery pack charging function and fault determination.

[0092] Specifically, the first current detection module is connected with the output end of the first current transformer, receives the current signal transmitted by the first current transformer, processes it, and then transmits it to the main control module.

[0093] In specific embodiments, the first electromagnetic disk detection module includes a second current transformer and a second current detection module;

[0094] The second current transformer is connected in series in the power supply circuit of the electromagnetic disk controller, and is used to convert a primary side current signal into a secondary side current signal and transmit it to the second current detection module;

[0095] The second current detection module is used to convert an input signal into a digital signal and transmit it to the main control module.

[0096] Specifically, in the embodiment, the second current transformer is a Hall current sensor, responsible for measuring the power supply current of the electromagnetic disc, i.e. the current output by the electromagnetic disc controller under normal conditions, and the battery pack output magnetism maintaining current under abnormal conditions. The second current detection module is connected with the output end of the second current transformer, receives the current signal transmitted by the second current transformer, processes it and then transmits it to the main control module.

[0097] Specifically, the battery pack charging current monitoring and the electromagnetic disc current (battery pack discharging current) monitoring principles are consistent. The current flowing through the current cable is converted into a direct current voltage signal DC_C of the current sampling circuit after passing through the Hall sensor, and the circuit diagram is as shown in Figure 4

[0098] In a specific embodiment, the main control module sends a control switch instruction of the battery pack to the magnetism maintaining switch in combination with the current signal and the voltage signal.

[0099] When the voltage across the two ends of the electromagnetic disc is lower than the set magnetism maintaining switching voltage, and the current across the two ends of the electromagnetic disc is lower than the set magnetism maintaining switching current, the main control module sends an opening instruction of the battery pack to the magnetism maintaining switch.

[0100] Specifically, in the case of the LIFT instruction, the voltage across the two ends of the electromagnetic disc and the power supply current are taken as double criteria, which can more accurately judge the running state of the electromagnetic disc and avoid the misjudgment of the power supply state of the electromagnetic disc caused by single condition interference. Based on the accurate power failure judgment result, the battery pack is put into use, which can reduce the misoperation probability of the electromagnetic disc power failure protection device and achieve 100% electromagnetic disc power failure protection.

[0101] In a specific embodiment, the charging and magnetism maintaining switching device further comprises a display module, an instruction acquisition module and a communication module.

[0102] The display module is connected with the main control module, used for receiving the working state, parameter data and alarm information of the charging and magnetism maintaining switching device transmitted by the main control module and performing visual display.

[0103] The instruction acquisition module is connected with the main control module, used for acquiring external instructions (such as LIFT instructions, etc.) and transmitting them to the main control module, so that the main control module can perform corresponding operations according to the external instructions.

[0104] ​The communication module is connected with the master module, and is used for making the master module and other modules interact data by using the Ethernet communication mode, such as transmitting LIFT instruction, charging and magnetic field maintaining switching device working state (magnetic field maintaining, charging), battery voltage, charging current, magnetic field maintaining current, alarm information, contactor action times and other data, so as to facilitate intelligent operation and maintenance and remote monitoring.

[0105] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging and magnetization switching device with multiple protection functions, characterized in that, The application relates to a full-control rectifier module, a filter module, a battery pack, a magnetic field maintaining input switch, a discharge circuit, a first electromagnetic disk detection module, a second electromagnetic disk detection module, a three-phase power supply state detection module and a main control module. The full-control rectifier module, the filter module, the battery pack, the magnetic field maintaining input switch and the discharge circuit are sequentially connected. The full-control rectifier module is connected with a three-phase alternating current power supply, is used for converting input three-phase alternating current into direct current, and transmits the direct current to the filter module. The filter module is used for filtering input direct current. The battery pack is used for supplying power to an electromagnetic disk. The magnetic field maintaining input switch is connected in parallel with the electromagnetic disk and is controlled by the main control module, and is used for enabling the battery pack to supply power to the electromagnetic disk. The discharge circuit is connected in parallel with the electromagnetic disk, is used for being turned on after magnetic field switching is completed or when the system is shut down, and is used for releasing magnetic energy stored in a coil of the electromagnetic disk. The three-phase power supply state detection module is connected with the full-control rectifier module, is used for acquiring input three-phase alternating current signals, and transmits the signals to the main control module. The first electromagnetic disk detection module is connected with a power supply circuit of an electromagnetic disk controller, is used for acquiring current signals of the electromagnetic disk controller, and transmits the signals to the main control module. The second electromagnetic disk detection module is connected with the magnetic field maintaining input switch, is used for acquiring voltage signals of the electromagnetic disk, and transmits the signals to the main control module. The main control module is used for sending switch instructions of the battery pack to the magnetic field maintaining input switch in combination with the current signals of the electromagnetic disk controller and the voltage signals of the electromagnetic disk, and is used for issuing an abnormal alarm of a charging power supply of the battery pack in combination with the three-phase alternating current signals. The application further comprises a first battery pack detection module and a second battery pack detection module.

2. The charging and magnetism maintaining switching device with multiple protection functions according to claim 1, characterized in that, The first battery pack detection module is connected with the filter module and the battery pack respectively, is used for acquiring current signals of a charging circuit of the battery pack, and transmits the signals to the main control module. The second battery pack detection module is connected with the battery pack and the magnetic field maintaining input switch respectively, is used for acquiring voltage signals of the charging circuit of the battery pack, and transmits the signals to the main control module. The main control module is used for issuing a charging fault alarm of the battery pack in combination with the current signals and the voltage signals of the charging circuit of the battery pack. The first battery pack detection module comprises a first current transformer and a first current detection module.

3. The charging and magnetism maintaining switching device with multiple protection functions according to claim 2, characterized in that, The first current transformer is connected in series between the filter module and the battery pack, is used for converting primary side current signals into secondary side current signals, and transmits the signals to the first current detection module. The first current detection module is used for converting input signals into digital signals, and transmits the signals to the main control module. The first electromagnetic disk detection module comprises a second current transformer and a second current detection module.

4. The charging and magnetism maintaining switching device with multiple protection functions according to claim 3, characterized in that, The second current transformer is connected in series in a power supply circuit of an electromagnetic disk controller, is used for converting primary side current signals into secondary side current signals, and transmits the signals to the second current detection module. The second current detection module is used for converting input signals into digital signals, and transmits the signals to the main control module. The main control module sends switch instructions of the battery pack to the magnetic field maintaining input switch in combination with the current signals of the electromagnetic disk controller and the voltage signals of the electromagnetic disk.

5. The charging and magnetism maintaining switching device with multiple protection functions according to claim 4, characterized in that, ​ When the voltage across the electromagnet is lower than a set magnetic retention switching voltage and the current across the electromagnet is lower than a set magnetic retention switching current, the main control module sends an opening instruction of the battery pack to the magnetic retention input switch.

6. The charging and magnetism maintaining switching device with multiple protection functions according to claim 5, characterized in that, The main control module is connected with the first battery pack detection module and the second battery pack detection module respectively, used for receiving the charging current signal and the charging voltage signal of the battery pack charging loop and issuing the first alarm signal or the second alarm signal; the first alarm signal is used for controlling the display module to trigger a low battery voltage alarm when the charging voltage signal is lower than a set alarm voltage threshold; the second alarm signal is used for controlling the display module to trigger a low battery power alarm when it is determined that the battery power is lower than a preset power threshold.

7. The charging and magnetism maintaining switching device with multiple protection functions according to claim 6, characterized in that, The display module, the instruction acquisition module and the communication module are further included. The display module is connected with the main control module, used for receiving the charging and magnetic retention switching device working state, parameter data and alarm information transmitted by the main control module and performing visual display. The instruction acquisition module is connected with the main control module, used for collecting external instructions and transmitting them to the main control module, so that the main control module can perform corresponding operations according to the external instructions. The communication module is connected with the main control module, used for making the main control module and other modules interact with each other in an Ethernet communication mode.

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