A marine multi-interface magnetic starting system and control method thereof

Abstract

The present invention relates to a marine multi-interface magnetic starting system, comprising a magnetic starter, wherein the primary side of the transformer on the magnetic starter takes power from a three-phase main circuit, and the secondary side supplies power to a control circuit of the magnetic starter, wherein one end of the three-phase main circuit is connected to a power supply, and the other end is connected to a motor, wherein a manual stop switch, an automatic stop switch, an automatic start branch and a contactor are sequentially connected in series on the control circuit, wherein the contactor controls the connection of the main contact of the contactor, and the connection between the automatic stop switch and the automatic start branch is controlled by an automatic control system. The system has local and remote manual start-stop interfaces and automatic start-stop interfaces, and the number of interfaces is easy to expand, which is convenient for the standardized design of the magnetic starter. The magnetic starter has local and remote manual start-stop interfaces and automatic start-stop interfaces, and the number of interfaces is easy to expand, which is convenient for the standardized design of the magnetic starter.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic starters and relates to a marine multi-interface magnetic starting system and a control method thereof. Background Art

[0002] The ship's auxiliary engine system contains a large number of ventilation units and pumps, which involve manual and automatic control of the start and stop of the auxiliary motors and pumps, as well as their overload, short circuit and thermal protection. According to the CCS (China Classification Society) specifications, motors (except for living and maintenance equipment) and pumps with a rated power equal to or greater than 1kW should be powered by an independent final branch, and an independent starter should be used to control and protect the power supply of such power-dragging devices. Compared with ground power plants and substations, ship power stations, especially new battery power stations, have a smaller capacity. If multiple motors and pumps in the auxiliary system are started at the same time, the impact on the power station will be greater, resulting in instability of the ship's power system. With the emergence of new energy ships, especially battery-powered ships (hereinafter referred to as electric ships), higher requirements are placed on the start and stop control of auxiliary system motors and pumps.

[0003] For small-capacity auxiliary motors and pumps of 0.5-10kW, the full-voltage direct starting method controlled by the contactor can be adopted. The electromagnetic force generated by the current flowing through the contactor coil is used to attract the armature, so as to drive the mechanical linkage contacts to be attracted or released, thereby controlling the connection and disconnection of the relevant circuits. For traditional magnetic starters, the control circuit voltage is directly taken from the main circuit such as 400VAC, and the control switch operation involves a higher main circuit voltage, which is more harmful to accidental electric shock and has a greater electric shock stress reaction, especially when the ship is tilted or swaying, causing people to fall or collide due to electric shock.

[0004] With the promotion and application of electric propulsion ships and new energy powered ships, the automation level of ship engine rooms has gradually improved. A large number of conventional magnetic starters with only local manual control functions for various fans, oil pumps, and water pumps have reduced the automation level of ships to a certain extent. For new energy powered ships, especially pure battery powered ships, the ventilation and cooling of power batteries and their battery compartments, the extraction and dilution of combustible gases in the battery compartment, and the release and extraction of heptafluoropropane fire extinguishing gas in the battery compartment all involve automatic control of the magnetic starter of the battery compartment ventilator. Conventional magnetic starters with only local manual control functions cannot meet this multi-condition automatic control requirement. At the same time, the magnetic starter installed in the engine room and with only local control must be manually operated in the engine room, and its starting conditions need to be manually judged, which increases the labor intensity of the crew and is not conducive to the optimal control of the power of the entire ship. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to propose a marine multi-interface magnetic starting system and a control method thereof, so that the magnetic starter has local and remote manual start and stop interfaces and automatic start and stop interfaces, and the number of interfaces is easy to expand, which facilitates the standardized design of the magnetic starter.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A marine multi-interface magnetic starting system, characterized in that it includes a magnetic starter, wherein the primary side of the transformer on the magnetic starter draws power from a three-phase main circuit, and the secondary side supplies power to a control circuit of the magnetic starter, one end of the three-phase main circuit is connected to a power supply, and the other end is connected to a motor, and a manual stop switch, an automatic stop switch, an automatic starting branch and a contactor are sequentially connected in series on the control circuit, the contactor controls the connection of the contactor main contacts, and the connection between the automatic stop switch and the automatic starting branch is controlled by an automatic control system.

[0008] Furthermore, a manual starting branch is connected in parallel to the automatic starting branch.

[0009] Furthermore, a first remote control switch and a first local control switch are connected in parallel on the manual starting branch, wherein the first remote control switch controls the connectivity of the control circuit of the magnetic starter through remote operation, and the first local control switch controls the connectivity of the control circuit of the magnetic starter through local manual operation.

[0010] Furthermore, the automatic control system includes a whole ship controller, to which an automatic start relay and an automatic stop relay connected in parallel are connected, the automatic start relay controls the connection of the automatic start relay contacts on the automatic start branch, and the automatic stop relay controls the connection of the automatic stop relay contacts on the automatic stop switch.

[0011] Furthermore, the whole ship controller is also connected to a heptafluoropropane control system, which includes a sensor. After receiving the signal sent by the sensor, the heptafluoropropane control system sends instructions to the whole ship controller, so that the whole ship controller controls the contacts on the control circuit of the magnetic starter.

[0012] Furthermore, the power supply is an AC distribution board, the motor is a three-phase AC auxiliary motor, the AC distribution board supplies power to the three-phase AC auxiliary motor through a circuit breaker with overcurrent protection, the magnetic starter performs start and stop control on the three-phase AC auxiliary motor, and a thermal relay is provided on the three-phase main circuit, and the thermal relay controls the thermal relay auxiliary contacts.

[0013] Furthermore, the contactor also controls the connection of the auxiliary contacts of the contactor, and a self-locking circuit is formed after the auxiliary contacts of the contactor are connected.

[0014] Furthermore, the manual stop switch includes a second local control switch and a second remote control switch connected in series, wherein the second local control switch controls the connectivity of the control circuit of the magnetic starter through local manual operation, and the second remote control switch controls the connectivity of the control circuit of the magnetic starter through remote operation.

[0015] Furthermore, a self-locking knob switch is connected in parallel to the control circuit, and the self-locking knob switch controls the mode conversion relay, and the mode conversion relay controls the first contact of the mode conversion relay and the second contact of the mode conversion relay. The first contact of the mode conversion relay is connected in series with the automatic start relay contact, and the second contact of the mode conversion relay is connected in series with the automatic stop relay contact.

[0016] A control method for a marine multi-interface magnetic starter, characterized in that the method comprises the following steps:

[0017] S001, initial state, at this time, the automatic start relay and the automatic stop relay are in the released state, and the magnetic starter has no automatic control command;

[0018] S002, automatic start state, when the whole ship controller receives the fan start command from the heptafluoropropane control system and starts the fan, or when the whole ship controller receives the highest single cell temperature value in the shipboard power lithium battery management system is over-temperature, or the ambient temperature value in the power lithium battery management system is over-temperature, and the whole ship controller does not receive the fan stop command from the heptafluoropropane control system, the whole ship controller controls the automatic stop relay to remain in the release state, and the controller controls the automatic start relay to be energized and released after 500ms;

[0019] S003, automatic stop state, when the whole ship controller detects that the highest single cell temperature value of the power lithium battery management system has recovered from over-temperature, and the ambient temperature value in the power lithium battery management system has recovered from over-temperature, and the HFC-227ea control system has not requested to start the fan, the whole ship controller controls the automatic stop relay to be continuously released, at which time the automatic stop relay contact acts for 500ms, cuts off the control circuit power supply of the magnetic starter, and the corresponding contactor loses power, and the corresponding contactor main contact and the first auxiliary contact of the contactor act at the same time, causing the main circuit and the control circuit to lose power;

[0020] S004, HFC-227ea release end state. When the ship controller does not detect the fan stop command of the HFC-227ea control system for 1 hour, the fan state is transferred to the initial step S001 state. During this period, the fire extinguishing process has been completed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] A marine multi-interface magnetic starting system has local and remote manual start-stop interfaces and automatic start-stop interfaces, and the number of interfaces is easy to expand, which is convenient for the standardized design of magnetic starters. The magnetic starter has local and remote manual start-stop interfaces and automatic start-stop interfaces, and the number of interfaces is easy to expand, which is convenient for the standardized design of magnetic starters. The control power supply adopts a lower AC230V control power, which is more conducive to personal safety during operation compared to AC400V voltage; in the control of the battery compartment fan motor of the electric ship, the stop function has a higher priority than the start function, which is more conducive to the safety of ship fire extinguishing; the magnetic starter has physical and virtual manual mode and automatic mode switching functions, realizing its control redundancy and flexible operation functions.

[0023] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 This is a principle block diagram of a marine multi-interface magnetic starting system of the present invention;

[0027] Figure 2 This is a circuit connection diagram of a marine multi-interface magnetic starting system of the present invention;

[0028] Figure 3 This is a flow chart of automatic control state of a battery compartment fan of a marine multi-interface magnetic starting system of the present invention;

[0029] Figure 4 A battery compartment fan monitoring interface of a marine multi-interface magnetic starting system of the present invention;

[0030] Among them: 101, power supply; 102, circuit breaker; 200, magnetic starter; 2010, thermal relay; 2011, thermal relay auxiliary contact; 202, transformer; 203, second local control switch; 204, second remote control switch; 205, reserved stop interface; 206, reserved start interface; 207, first remote control switch; 208, first local control switch; 2090, contactor; 2091, contactor main contact; 2092, contactor first auxiliary contact; 2093, contactor second auxiliary contact; 210, self-locking rotary Push button switch; 2110, mode conversion relay; 2111, first contact of mode conversion relay; 2112, second contact of mode conversion relay; 2113, third contact of mode conversion relay; 300, electric motor; 400, whole ship controller; 4010, automatic start relay; 4011, automatic start relay contact; 4020, automatic stop relay; 4021, automatic stop relay contact; 500, power lithium battery management system; 600, heptafluoropropane control system; 700, shipboard emergency lead-acid battery; 800, human-computer interaction display system. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices consistent with some aspects of the present invention as detailed in the appended claims.

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] A marine multi-interface magnetic starting system includes a magnetic starter 200, wherein the primary side of the transformer on the magnetic starter 200 draws power from a three-phase main circuit, and the secondary side supplies power to a control circuit of the magnetic starter 200, one end of the three-phase main circuit is connected to a power supply 101, and the other end is connected to a motor 300, and a manual stop switch, an automatic stop switch, an automatic start branch and a contactor 2090 are sequentially connected in series on the control circuit, the contactor 2090 controls the connection of a contactor main contact 2091, and the connection between the automatic stop switch and the automatic start branch is controlled by an automatic control system.

[0034] Furthermore, a manual starting branch is connected in parallel to the automatic starting branch.

[0035] Furthermore, a first remote control switch 207 and a first local control switch 208 are connected in parallel on the manual starting branch, wherein the first remote control switch 207 controls the connectivity of the control circuit of the magnetic starter 200 through remote operation, and the first local control switch 208 controls the connectivity of the control circuit of the magnetic starter 200 through local manual operation.

[0036] Furthermore, the automatic control system includes a whole ship controller 400, to which an automatic start relay 4010 and an automatic stop relay 4020 connected in parallel are connected, the automatic start relay 4010 controls the connection of an automatic start relay contact 4011 on the automatic start branch, and the automatic stop relay 4020 controls the connection of an automatic stop relay contact 4021 on the automatic stop switch.

[0037] Furthermore, the whole ship controller 400 is also connected to a heptafluoropropane control system 600, and the heptafluoropropane control system 600 includes a sensor. After receiving the signal sent by the sensor, the heptafluoropropane control system 600 sends an instruction to the whole ship controller 400, so that the whole ship controller 400 controls the contacts on the control circuit of the magnetic starter.

[0038] Furthermore, the power supply 101 is an AC distribution board, the motor 300 is a three-phase AC auxiliary motor, the AC distribution board supplies power to the three-phase AC auxiliary motor through a circuit breaker 102 with overcurrent protection, the magnetic starter 200 performs start and stop control on the three-phase AC auxiliary motor, and a thermal relay 2010 is provided on the three-phase main circuit, and the thermal relay 2010 controls the thermal relay auxiliary contact 2011.

[0039] Furthermore, the contactor 2090 also controls the connection of the first auxiliary contact 2092 of the contactor, and a self-locking circuit is formed after the first auxiliary contact 2092 of the contactor is connected.

[0040] Furthermore, the manual stop switch includes a second local control switch 203 and a second remote control switch 204 connected in series, wherein the second local control switch 203 controls the connectivity of the control circuit of the magnetic starter through local manual operation, and the second remote control switch 204 controls the connectivity of the control circuit of the magnetic starter through remote operation.

[0041] Furthermore, a self-locking knob switch 210 is connected in parallel to the control circuit, and the self-locking knob switch 210 controls the mode conversion relay 2110, and the mode conversion relay 2110 controls the first contact 2111 of the mode conversion relay and the second contact 2112 of the mode conversion relay. The first contact 2111 of the mode conversion relay is connected in series with the automatic start relay contact 4011, and the second contact 2112 of the mode conversion relay is connected in series with the automatic stop relay contact 4021.

[0042] A control method for a marine multi-interface magnetic starter, the method comprising the following steps:

[0043] S001, initial state, at this time, the automatic start relay 4010 and the automatic stop relay 4020 are in the released state, and the magnetic starter 200 has no automatic control instruction;

[0044] S002, automatic start state, when the whole ship controller 400 receives a request for fan start command from the heptafluoropropane control system 600 and starts the fan, or when the whole ship controller 400 receives a maximum cell temperature value over-temperature in the shipborne power lithium battery management system 500 or an ambient temperature value over-temperature in the power lithium battery management system 500, and the whole ship controller 400 does not receive a request for fan stop command from the heptafluoropropane control system 600, the whole ship controller 400 controls the automatic stop relay 4020 to remain in the released state, and the controller 400 controls the automatic start relay 4010 to be energized for 500ms and then released;

[0045] S003, automatic stop state, when the whole ship controller 400 detects that the highest single cell temperature value of the power lithium battery management system 500 has recovered from over-temperature, and the ambient temperature value in the power lithium battery management system 500 has recovered from over-temperature, and the HFC-227ea control system 600 has not requested to start the fan, the whole ship controller 400 controls the automatic stop relay 4020 to be continuously released, at which time the automatic stop relay contact 4021 acts for 500ms, cutting off the control circuit power supply of the magnetic starter 200, and the corresponding contactor 2090 loses power, and the corresponding contactor main contact 2091 and the contactor first auxiliary contact 2092 act simultaneously, causing the main circuit and the control circuit to lose power;

[0046] S004, HFC-227ea release end state. When the ship controller 400 does not detect the fan stop command of the HFC-227ea control system 600 for 1 hour, the fan state is transferred to the initial step S001 state. During this period, the fire extinguishing process has been completed.

[0047] Embodiment 1:

[0048] like Figure 1As shown, the primary side of the transformer 202 directly draws power from two phases of the three-phase main circuit, and the secondary side supplies power to the control circuit of the magnetic starter 200. One end of the three-phase main circuit is connected to a 400V power supply 101, and the other end is connected to a motor 300, which is connected to the fan. The control circuit of the magnetic starter 200 includes a stop interface circuit and a start interface circuit, wherein the stop interface circuit adopts a series connection mode, wherein a manual stop switch and an automatic stop switch are connected in series, and the automatic stop switch is controlled by an automatic control system, and any stop interface can send a stop action Cut off the power supply of the motor 300, and the starting interface adopts a parallel mode, with a manual starting branch and an automatic starting branch connected in parallel. Under the premise of no stop command, any starting interface action can connect the motor power supply, and the automatic starting branch is controlled by the automatic control system. Therefore, the priority of the stop control is higher than the priority of the start control. After the control circuit of the magnetic starter 200 is connected, the contactor 2090 controls the contactor main contact 2091 to be connected, and the automatic starting branch in the stop interface is connected in parallel with the bypass interface of the manual starting branch, thereby ensuring the effectiveness of the manual emergency control.

[0049] If a stop interface of the magnetic starter 200 needs to be added, it is only necessary to connect the stop interface in series in the existing stop interface circuit; if a start interface of the magnetic starter 200 needs to be added, it is only necessary to connect the start interface in parallel in the existing start interface. The expansion of the start interface and the stop interface is convenient and effective.

[0050] Example 2

[0051] like Figure 2 As shown, the automatic control system of the magnetic starter 200 is executed by the whole ship controller 400. In order to ensure the standardization of the design and manufacture of the magnetic starter 200, the automatic control execution component is installed on the outside of the magnetic starter 200, and only the automatic start and automatic stop interfaces are set inside the magnetic starter 200. The control of the fan motor in the battery compartment of the electric ship involves the maximum battery cell temperature from the battery management system 500, the battery compartment ambient temperature, and the battery compartment fan control instructions from the heptafluoropropane control system 600. The whole ship controller 400 integrates the above information and comprehensively controls the fan through the magnetic starter 200. Among the automatic control instructions of the battery compartment fan, the start and stop control instructions of the fan of the heptafluoropropane control system 600 have the highest priority.

[0052] Under normal circumstances, in order to ensure the safety of the electric boat power battery during navigation, charging with the ship-borne charger and charging with the shore-based charging pile, the battery compartment fan should be in automatic control mode. Especially when charging with the shore-based charging pile, the power supply of the whole ship controller 400 and the HFC-227ea control system 600 must still be guaranteed, and the ship's 24V lead-acid battery pack must be used for uninterrupted power supply. In order to ensure the redundancy of manual control of the magnetic starter 200, the human-computer interaction display system 800 located in the control console and the engine room is additionally provided with a manual control and automatic control switching function to ensure the effectiveness of manual control after the magnetic starter switch fails. The control system of the power battery is the battery management system 500. The power battery is a lithium iron phosphate battery, which supplies power to the propulsion system and auxiliary system of the entire ship. The shipboard lead-acid battery 700 is a battery, which only supplies power to the emergency lighting, navigation, and control system when the entire ship is out of power. The power battery can charge the shipboard lead-acid battery 700 after voltage conversion. The battery management system 500, the heptafluoropropane control system 600, the shipboard lead-acid battery 700 and the human-computer interaction display system 800 are respectively connected to the ship controller 400.

[0053] The three-phase AC auxiliary motor is powered by the shipboard AC switchboard ASB through the circuit breaker 102 with overcurrent and short circuit protection. The magnetic starter 200 controls the start and stop of the motor 300. The control power is supplied by a built-in micro transformer with a ratio of AC400 / AC230V. The primary side of the micro transformer is connected to two phases of the three-phase AC400V, and the secondary side is connected to the control system of the magnetic starter 200. When the magnetic starter controls the motor 300, the priority of the stop control is higher than the start control. Each normally closed stop interface is connected in series in the control circuit of the magnetic starter 200, including a thermal relay 2010, a thermal relay control thermal relay auxiliary contact 2011, a second local control switch 203, a second remote control switch 204, an automatic stop relay contact 4021, and a reserved stop interface 205. When any stop interface issues a stop action, the magnetic starter 200 cuts off the power supply to the motor 300; each normally open start interface adopts a parallel connection, including a first remote control switch 207, a first local control switch 208, an automatic start relay contact 40 11. A starting interface 206 is reserved. Under the premise of no stopping action, any starting interface sends a starting action, the contactor 2090 coil is energized, the contactor main contact 2091, the contactor first auxiliary contact 2092, and the contactor second auxiliary contact 2093 are actuated, wherein the contactor main contact 2091 connects the main circuit, and the contactor first auxiliary contact 2092 forms a coil power supply self-locking, thereby continuously connecting the power supply of the motor 300, and the whole ship controller 400 collects the state of the contactor second auxiliary contact 2093 to judge the contactor's attraction and release working state.

[0054] In order to realize the test and emergency operation of the magnetic starter, the switch between manual and automatic control modes is realized through the self-locking knob switch 210. When the self-locking knob switch 210 is turned to the automatic position, the coil of the mode conversion relay 2110 is energized, the first contact 2111 of the mode conversion relay, the second contact 2112 of the mode conversion relay, and the third contact 2113 of the mode conversion relay are actuated, the first contact 2111 of the mode conversion relay connects the automatic start branch, and the second contact 2112 of the mode conversion relay disconnects the bypass circuit of the automatic stop relay contact 4021. When the switch 210 is turned to the automatic position, the mode conversion relay 2110 coil is energized, the first contact 2111 of the mode conversion relay, the second contact 2112 of the mode conversion relay, and the bypass circuit of the automatic stop relay contact 4021 is disconnected. Figure 1 When the current manual position is reached, the contacts of the mode switching relay 2110 return to Figure 2 In the state, the first contact 2111 of the mode conversion relay disconnects the automatic start branch, and the second contact 2112 of the mode conversion relay short-circuits the automatic stop contact. The whole ship controller 400 collects the state of the third contact 2113 of the mode conversion relay to judge the manual and automatic working modes of the magnetic starter 200. In order to achieve the standardization of the interface of the magnetic starter 200, only the automatic start and stop interfaces are set inside it, and the relevant execution components are arranged in the whole ship controller 400, and the automatic start relay 4010 and the automatic stop relay 4020 are controlled by the whole ship controller 400. The whole ship controller 400 and the HFC-227ea control system 600 use the shipboard 24V lead-acid battery for uninterrupted power supply.

[0055] The multi-magnetic interface control system can be controlled through the virtual button switch in the interface of the human-machine interactive display system 800. In order to prevent the failure of the magnetic starter operation mode knob, which causes the failure of the mode conversion of the magnetic starter 200, a virtual switch for selecting the operation mode of the starter is set on the human-machine interactive display system 800 of the control console and the cabin. When the manual mode is selected, the whole ship controller 400 controls the automatic stop relay 4020 to be continuously released, and controls the automatic start relay 4010 to be continuously released; when the automatic mode is selected, the whole ship controller enters the state of automatic control of the fan and performs automatic control of the fan. In addition, the whole ship controller 400 can communicate the collected state of the second auxiliary contact 2093 of the contactor, the state of the third contact 2113 of the mode conversion relay, the fan start and stop request of the heptafluoropropane control system 600, and the maximum cell temperature of the battery and the ambient temperature of the battery compartment sent by the power lithium battery management system 500 to the human-machine interactive display system 800, so as to facilitate the monitoring and control of the magnetic starter. The interface design of the human-machine interactive reality system for monitoring and controlling the fan in the battery compartment is as follows: Figure 4As shown, because the magnetic starter mode on the human-machine interaction display system 800 is converted to a standby function, when the human-machine interaction display system 800 mode conflicts with the mode selected by the knob switch, the mode selected on the human-machine interaction display system 800 has a higher priority, but the mode selection switch on the starter has realized the priority of the manual mode in the physical circuit, so the operator can realize the manual control mode of the magnetic starter 200 at any time to prevent the control failure of the magnetic starter 200.

[0056] Example 3

[0057] Whether the fan in the battery compartment works or not is related to the temperature control of the power lithium battery in the battery compartment, the ambient temperature control of the battery compartment, the dilution of the combustible gas concentration in the battery compartment, and the key process of releasing and extracting the HFC-227ea fire extinguishing gas. Taking the control of the fan in the battery compartment as an example, the whole ship controller 400 integrates the highest battery monomer temperature, the ambient temperature of the battery compartment, and the fan start and stop command information from the HFC-227ea control system 600 in the battery management system 500, comprehensively judges the automatic start and stop of the fan, and realizes it through relays 4010 and 4020. The automatic start condition of the fan in the battery compartment is that the highest monomer temperature of the battery is over-temperature, or the ambient temperature of the battery compartment is over-temperature, or the HFC-227ea control system 600 requests to start the fan. At this time, the combustible gas concentration in the battery compartment is high, and the fan is started for ventilation and dilution; the automatic stop condition is that the highest monomer temperature of the battery is over-temperature and recovered, or the ambient temperature of the battery compartment is over-temperature and recovered, or the HFC-227ea control system 600 requests to stop the fan. At this time, the combustible gas concentration in the battery compartment is too high, and the fan must be stopped, and the release of HFC-227ea fire extinguishing gas in the battery compartment begins.

[0058] To prevent the fan from starting and stopping frequently, a certain hysteresis value is set for the temperature over-temperature and over-temperature recovery thresholds, such as 55℃ for over-temperature start and 45℃ for over-temperature recovery. Figure 3 The automatic control mode operation state transition diagram shown in the figure, each state and the transition conditions between states are as follows:

[0059] S001 is the initial state, which is the state when the control system is first powered on. At this time, the stop relay 4020 and the automatic start relay 4010 are both in the released state, and the magnetic starter 200 has no automatic control instructions.

[0060] S002 is the automatic start state. When the whole ship controller 400 detects that the HFC-227ea control system 600 requests to start the fan, or detects that the highest cell temperature of the battery is over-temperature, or the battery environment temperature is over-temperature, and the HFC-227ea control system 600 has no request to stop the fan, the whole ship controller 400 controls the stop relay 4020 to maintain the release state, and controls the automatic start relay 4010 to be attracted for 500ms and then released. At this time, the circuit connection function of the magnetic starter 200 can be realized through the self-locking relationship of the contactor 2090 and the first auxiliary contact 2092 of the contactor in the magnetic starter 200. The automatic start control adopts pulse control, so that the automatic start process has no memory, which can prevent high-frequency malfunctions of manual start and stop and automatic start and stop.

[0061] S003 is the automatic stop state. Since the battery cell temperature and the battery compartment ambient temperature are strongly coupled variables, in order to ensure the effectiveness of the battery cell temperature over-temperature recovery, when the whole ship controller 400 detects that the battery's highest cell temperature has recovered from over-temperature, and the battery ambient temperature has recovered from over-temperature, and the HFC-227ea control system 600 has not requested to start the fan, the whole ship controller 400 controls the automatic stop relay 4020 to release after 500ms, and controls the automatic start relay 4010 to continue to release. At this time, the automatic stop contact relay 4021 acts for 500ms, cutting off the control circuit of the magnetic starter 200, and the corresponding contactor 2090 loses power. The corresponding contactor main contact 2091, the contactor first auxiliary contact 2092, and the contactor second auxiliary contact 2093 act at the same time, causing the main circuit and the control circuit to lose power. The automatic stop control adopts pulse control, so that the automatic stop process has no memory, which can prevent high-frequency malfunctions of manual start and stop and automatic start and stop.

[0062] S004 is the state of HFC-227ea release. The high density of HFC-227ea gas, which is six times that of air, is used to discharge the air in the cabin out of the cabin. This process involves the fire-fighting safety of the entire ship. The battery compartment fan must be stopped immediately and continuously to reduce the circulation of oxygen and prevent HFC-227ea gas from being diluted by flowing air, which may cause fire-fighting failure and personal and property losses. At this time, the whole ship controller controls the automatic stop relay 4020 to be continuously attracted and controls the automatic start relay 4010 to be continuously released. When the whole ship controller 400 does not detect the fan stop command of the HFC-227ea control system 600 for 1 hour, the fan is transferred from the S004 state to the initial S001 state. During this period, if the fire-fighting process has been completed and the HFC-227ea gas needs to be discharged, the magnetic starter 200 can be placed in manual mode through the self-locking knob switch 210. The manual magnetic starter 200 performs ventilation of the battery compartment to prevent personnel from directly entering the battery compartment filled with high-density and high-concentration HFC-227ea gas and causing suffocation.

[0063] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0064] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A marine multi-interface magnetic starting system, characterized in that: The invention comprises a magnetic starter (200), wherein the primary side of a transformer (202) on the magnetic starter (200) takes power from a three-phase main circuit, and the secondary side supplies power to a control circuit of the magnetic starter (200); one end of the three-phase main circuit is connected to a power source (101), and the other end is connected to a motor (300); a manual stop switch, an automatic stop switch, an automatic start branch and a contactor (2090) are sequentially connected in series on the control circuit; the contactor (2090) controls the connection of a contactor main contact (2091); and the connection between the automatic stop switch and the automatic start branch is controlled by an automatic control system; The automatic control system comprises a whole ship controller (400), the whole ship controller (400) being connected to an automatic start relay (4010) and an automatic stop relay (4020) connected in parallel with each other, the automatic start relay (4010) controlling the connection of an automatic start relay contact (4011) on an automatic start branch, and the automatic stop relay (4020) controlling the connection of an automatic stop relay contact (4021) on an automatic stop switch; The whole ship controller (400) is also connected to a heptafluoropropane control system (600), the heptafluoropropane control system (600) comprising a sensor, and the heptafluoropropane control system (600) sends a command to the whole ship controller (400) after receiving a signal sent by the sensor, so that the whole ship controller (400) controls the contacts on the control circuit of the magnetic starter; The contactor (2090) also controls the connection of the first auxiliary contact (2092) of the contactor, and a self-locking circuit is formed after the first auxiliary contact (2092) of the contactor is connected.

2. A marine multi-interface magnetic starting system according to claim 1, characterized in that: The automatic starting branch is connected in parallel with a manual starting branch.

3. A marine multi-interface magnetic starting system according to claim 2, characterized in that: A first remote control switch (207) and a first local control switch (208) are connected in parallel on the manual starting branch, wherein the first remote control switch (207) controls the connectivity of the control circuit of the magnetic starter (200) through remote operation, and the first local control switch (208) controls the connectivity of the control circuit of the magnetic starter (200) through local manual operation.

4. A marine multi-interface magnetic starting system according to claim 1, characterized in that: The power source (101) is an AC distribution board, the motor (300) is a three-phase AC auxiliary motor, the AC distribution board supplies power to the three-phase AC auxiliary motor via a circuit breaker (102) with overcurrent protection, the magnetic starter (200) performs start and stop control on the three-phase AC auxiliary motor, and a thermal relay (2010) is provided on the three-phase main circuit, and the thermal relay (2010) controls the thermal relay auxiliary contact (2011).

5. A marine multi-interface magnetic starting system according to claim 1, characterized in that: The manual stop switch comprises a second local control switch (203) and a second remote control switch (204) connected in series, wherein the second local control switch (203) controls the connectivity of the control circuit of the magnetic starter through local manual operation, and the second remote control switch (204) controls the connectivity of the control circuit of the magnetic starter (200) through remote operation.

6. A marine multi-interface magnetic starting system according to claim 1, characterized in that: A self-locking rotary switch (210) is also connected in parallel to the control circuit. The self-locking rotary switch (210) controls a mode conversion relay (2110). The mode conversion relay (2110) controls a first contact (2111) of the mode conversion relay and a second contact (2112) of the mode conversion relay. The first contact (2111) of the mode conversion relay is connected in series with an automatic start relay contact (4011), and the second contact (2112) of the mode conversion relay is connected in series with an automatic stop relay contact (4021).

7. A control method for a marine multi-interface magnetic starting system according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S001, initial state, at this time, the automatic start relay (4010) and the automatic stop relay (4020) are in the released state, and the magnetic starter (200) has no automatic control instruction; S002, automatic start state, when the whole ship controller (400) receives a request for fan start instruction from the heptafluoropropane control system (600), the fan is started, or when the whole ship controller (400) receives a message from the shipborne power lithium battery management system (500) that the highest single cell temperature value is over-temperature, or the ambient temperature value in the power lithium battery management system (500) is over-temperature, and the whole ship controller (400) does not receive a request for fan stop instruction from the heptafluoropropane control system (600), the whole ship controller (400) controls the automatic stop relay (4020) to maintain a released state, and the whole ship controller (400) controls the automatic start relay (4010) to be energized for 500ms and then released; S003, automatic stop state, when the whole ship controller (400) detects that the highest single cell temperature value of the power lithium battery management system (500) has recovered from over-temperature, and the ambient temperature value in the power lithium battery management system (500) has recovered from over-temperature, and the heptafluoropropane control system (600) has not requested to start the fan, the whole ship controller (400) controls the automatic stop relay (4020) to be continuously released, at which time the automatic stop relay contact (4021) acts for 500ms, cuts off the control circuit power supply of the magnetic starter (200), and the corresponding contactor (2090) loses power, and the corresponding contactor main contact (2091) and the contactor first auxiliary contact (2092) act simultaneously, causing the main circuit and the control circuit to lose power; S004, HFC-227ea release end state. When the ship controller (400) does not detect the fan stop command of the HFC-227ea control system (600) for 1 hour, the fan state is transferred to the initial state of step S001. During this period, if the fire extinguishing process is completed and the HFC-227ea gas needs to be discharged, the magnetic starter (200) can be placed in manual mode through the self-locking knob switch (210), and the manual magnetic starter (200) performs ventilation of the battery compartment.

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