JPH08216993A - Side thruster control device for ship - Google Patents

Abstract

PURPOSE: To provide a ship with a side thruster control device which helps to effectively utilize electric power generated by a generator and also enables rapid and safe steering to bring the ship off and alongside a pier. CONSTITUTION: An electric energy signal V1 for total electric power consumption inboard detected by an electric power detecting means and a speed signal V2 commanded by a maneuvering means are fed to a control panel 32 for a side thruster and compared with each other for computation. By means of a control signal V3 obtained based on the comparing result, a propeller pitch varying device 24 is driven to vary the pitch of a pitch variation type propeller 15, and thrust is controlled when bringing a ship off and alongside a pier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side thruster control device for a ship, which is used when the ship comes to or comes from a jetty, that is, when the ship comes off the dock.

[0002]

2. Description of the Related Art In recent years, in order to save labor and to quickly perform take-off and landing boats, coastal vessels, which have a particularly high frequency of take-off and landing boats, have been
A side thruster device for moving the hull laterally is provided. The side thruster device is roughly classified into a bow thruster device in which a propeller (screw) that gives thrust to the hull is provided at the bow of the hull and a stern thruster device in the stern of the hull, but these are almost the same configuration. And the designation differs depending on the installation position. The propeller is laterally attached to the outer surface of the vessel at the bow or stern, and the propeller is rotated to move the ship A in the lateral direction B as shown in FIG. It is like this.

There are two types of propellers, a fixed pitch type in which the water cutting angle is fixed and a variable pitch type in which the water cutting angle is variable. In either type, for example, depending on the situation at the time of berthing. The moving speed of the ship A in the lateral direction B, that is, the thrust is variable. That is, in the case of the fixed pitch type, the moving speed is controlled by changing the propeller rotation speed, and in the case of the variable pitch type, the moving speed is controlled by changing the pitch under the fixed rotation speed of the propeller.

The drive power source of the propeller includes an electric motor drive type and a diesel engine direct drive type, and most ships are of the electric drive type except the diesel engine direct drive type which is mounted on a special small ship. It is installed. The electric motor drive type includes an electric direct connection type and an electric hydraulic type. In the case of the electric direct connection type, an AC induction motor is adopted as a drive power source, and in that case, there are two types of thrust variable methods. The first thrust variable method is a method in which the rotation speed of the AC induction motor is kept constant and the propeller is of a variable pitch type. In the second variable method, the propeller is of a fixed pitch type, and the rotation speed of the AC induction motor is changed by changing the power supply frequency using an inverter or the like. However, in the case of using an inverter, the inverter is still expensive, so the first
In most cases, the variable pitch propeller, which is the thrust variable method, is often used. In addition, in the case of the electro-hydraulic type, since the rotation speed of the propeller can be controlled by controlling the hydraulic flow rate, there is an advantage that an inexpensive fixed pitch type propeller can be adopted, but the hydraulic efficiency is poor and the energy loss becomes large. It is not generally adopted for the reason.

Next, an example of a conventional side thruster control device will be described with reference to FIG. The generator 1 is for generating AC power for general power inside the ship, and is installed in the engine room and connected to the side thruster drive circuit 4 as a load and the general load circuit 5 via the main power supply line 2 and the main circuit breaker 3. Power is supplied from an AC power supply of a predetermined frequency. The side thruster drive circuit 4 includes a circuit breaker 1 on the secondary side of the main circuit breaker 3.
1, a starter 12, a current detecting means 13, and a side thruster AC induction motor (hereinafter, simply referred to as an electric motor) 14 are connected in series. In addition, between each of the members,
If necessary, it is connected via a power supply line. The circuit breaker 11 is for disconnecting the power supply path when an excessive current flows in the side thruster drive circuit 4 for some reason, and the starter 12 controls the start and stop of the electric motor 14 and the current detection means 13. Is for detecting a current flowing through the electric motor 14. The electric motor 14 is for rotatably driving a side thruster propeller (hereinafter, simply referred to as a propeller) 15 and is installed in a hull (not shown). The propeller 15 is provided outside the hull and below the waterline at the bow or stern of the hull.
It is directly connected via.

On the other hand, the inboard general load circuit 5 includes a circuit breaker 17
The general load 18 is connected via the.
The general load 18 is a general term for power loads such as lighting equipment on the ship, kitchen appliances such as refrigerators, and communication equipment, and the power consumption of the general load 18 varies greatly depending on the day and night, the navigation situation of the ship, the season, etc. To do. The side thruster ammeter 21 displays the current flowing through the electric motor 14, and is installed near the steering wheel 22. The steering handle 22 is installed in the steering room to issue a command for operating a ship, and a command for taking off and landing is also issued by operating the steering handle 22. The control handle 22 is composed of a lever or a dial as shown in the drawing, and
It is also equipped on both wings of the wheelhouse. The side thruster control panel 23 is for controlling the propeller pitch varying device 24 based on a command signal supplied from the operation handle 22, and the propeller pitch varying device 24 varies the pitch of the propeller 15 by hydraulic control. It has become.

Next, the operation of the side thruster control device having the above conventional structure will be described. When driving the generator 1,
Power is supplied to the side thruster drive circuit 4 and the general load circuit 5. If the take-off and landing of the ship is not performed, the command from the operation handle 22 is not output, and the breaker 1 is substantially
1 is in the OFF state or the starter 12 is in the non-driving state, and the electric motor 14 is in the stopped state. Also in this case, the general load 1
Since electricity is supplied to 8, the lighting and equipment required for navigation can operate normally. On the other hand, when performing the take-off and landing crosspiece, the starter 12 is driven by the command from the operation handle 22 and the electric motor 14 is rotated. As a result, the propeller 15 rotates, and the landing strip of the ship is carried out. The current change at this time is monitored by the crew member (ship operator) visually observing the side thruster ammeter 21. Then, the ship operator operates the steering handle 22 so that the amount of current flowing through the electric motor 14 does not exceed the power generation capacity, and performs the take-off and landing bar.

[0008]

Normally, the power generation capacity of the generator 1 is set so as to cover the power consumption required for the side thruster operation, but the power consumption of the general load 18 used in parallel is also taken into consideration. Must be set. That is, when setting the total power generation capacity, the electric power required for the side thruster operation and the general load
8 and the maximum power amount of 8 are added to determine. However, the actual power consumption of the general load 18 may be larger than the preset value at the time of designing, and in that case, sufficient power required for the side thruster operation cannot be provided, which interferes with the take-off and landing work. However, in order to increase the power generation capacity, a large-scale power generation facility is necessary, which contributes to the soaring ship prices. Therefore, we have installed a generator that can generate the minimum amount of power required. Is the reality.

Here, the method for determining the power generation capacity and the general load 1
To further explain the change contents of No. 8, the total power generation capacity of the generator 1 is P1, the total power consumption of the side thrusters is P2,
When the maximum value of the general load 18 is P3, the total power generation capacity P
1 is determined by P1 ≧ P2 + P3. However, the power consumption of the general load 18 is different in summer and winter, and is significantly increased especially in the summer when cooling or the like is used. In addition, general load 1
The power consumption of No. 8 is an estimated value, and this estimated value often differs from the actual value when the ship actually travels after being constructed. Therefore, conventionally, the actual demand rate (maximum electric power of the general load 18 used together) of the generator 1 is measured in the sea trial operation, and the electric energy of P2 + P3 is within the total electric power generation capacity P1 of the generator 1. A method such as limiting the maximum electric power P2 of the side thruster so as to be settled was adopted.

Power consumption P of such a side thruster
For example, in the conventional device shown in FIG. 4, the operator of the steering wheel 22 does not exceed the predetermined limit value while looking at the side thruster ammeter 21 near the steering wheel 22. Method or an interlock that limits the increase in thrust by detecting the current value of the side thruster drive circuit 4 so that the load will not be applied even if the operator mistakenly operates above the limit value. Methods such as installation are adopted.

However, these above-mentioned methods have the following problems. As described above, the power consumption P3 of the general load 18 greatly increases in the summer, so if the maximum power consumption at this time is set and the total power consumption P2 of the usable side thrusters is set, the power consumption of the general load 18 will be increased. Generator capacity P in winter when power P3 is low
There is a margin in 1. However, in the conventional side thruster control device, even if there is a large difference between the normal value and the maximum value of the general loads used in parallel, or even if the steering state of the maximum value is extremely rare. In order to set the overload prevention function such as interlock, the generator capacity must be set to the maximum value in consideration of the worst situation. Therefore, in the state of the normal value, although there is a margin in the generator capacity as described above, it cannot be effectively used such as utilizing it for the side thruster control. An object of the present invention is to effectively use electric power generated by a generator,
An object of the present invention is to provide a side thruster control device for a ship capable of quickly and safely operating a take-off and landing ship.

[0012]

A side thruster control device for a ship according to the present invention for achieving the above object comprises at least a variable pitch side thruster propeller,
A side thruster control device for a ship, comprising: an electric motor that is provided inside the ship to rotate and drive the side thruster propeller; a steering means that operates the ship; and a generator that supplies electric power into the ship. The electric power detection means for detecting the electric power amount signal corresponding to the total electric power consumption in the ship and the electric power amount signal and the speed signal output in response to the command from the control means are compared and operated to generate electricity by the generator. If the total power consumption is small and there is surplus power with respect to the power that is consumed, the control signal corresponding to the speed signal is set if the total power consumption is large and there is no surplus power. A side thruster control panel for outputting, and a propeller pitch varying device for controlling the pitch of the variable pitch type side thruster propeller based on the control signal. .

Further, a side thruster control device for a ship according to the present invention for achieving the above object includes at least a fixed pitch type side thruster propeller, and an electric motor provided inside the ship for rotationally driving the side thruster propeller. In a side thruster control device for a ship, which comprises a maneuvering means for maneuvering the ship and a generator for supplying electric power into the ship, electric power for detecting a power amount signal corresponding to the total power consumption in the ship When the detection means and the electric energy signal and the speed signal output according to the command from the control means are compared and calculated, and the total power consumption is small with respect to the electric power generated by the generator, and there is surplus power. Is a side thruster that outputs a control signal that is set within the remaining capacity of the generator when the total power consumption is large and there is no surplus power. And use the control panel, characterized in that a variable rotational speed system and start device for controlling the driving power supply frequency of the motor based on the control signal.

[0014]

The total power consumption, which is the sum of the power consumption of the general load and the power consumption of the side thruster control, is detected by the power detection means, and the power value at this time becomes a digitized power amount signal for the side thruster. Supplied to the control panel. Further, the control means is configured to digitize the speed signal instructed by the operator and supply it to the side thruster control panel. The side thruster control panel compares the electric power signal and the speed signal to calculate the variable pitch. A control signal for controlling the pitch of the mold propeller is supplied to the propeller pitch control device. As a result, the pitch of the variable pitch type propeller is adjusted, and the speed control of the ship at the time of the landing and landing bar is performed.

Since the control signal is obtained by comparing and calculating the speed signal and the electric energy signal corresponding to the total power consumption, when the total power consumption is small and the difference with the power generation capacity of the generator, that is, the surplus power is large. The propeller pitch is adjusted by the control signal so that the ship can move at high speed, and the take-off and landing boat operation is performed by effectively utilizing the surplus power. On the other hand, when the total power consumption is large and the surplus power is small, the control signal will change the propeller pitch within the range of the surplus power even if the high speed is instructed by the steering means, and power failure or It is possible to prevent damage to the generator.

Alternatively, in the side thruster control panel, the electric energy signal and the speed signal are compared and calculated, and a control signal for controlling the rotation of the fixed pitch type propeller is supplied to the rotation speed varying device / starter. The fixed pitch propeller is directly connected to the induction motor, and the rotation speed of the induction motor is controlled by the frequency control of the rotation speed variable device / starter. Therefore, by changing the frequency of the rotation speed varying device and the starter by the control signal, the rotation speeds of the electric motor and the fixed pitch type propeller are controlled, and the speed control at the time of the take-off and landing bar is performed. Since the control signal is obtained based on the comparison calculation of the speed signal and the electric energy signal corresponding to the total power consumption, when the total power consumption is small and the difference between the power generation capacity of the generator, that is, the surplus power is large, The control signal adjusts the rotation speed of the propeller so that the ship can move at high speed, and the take-off / berthing ship maneuvering that effectively uses the surplus power is performed. On the other hand, when the total power consumption is large and the surplus power is small, the control signal will change the number of revolutions of the propeller within the range of the remaining capacity of the generator, even if the operating means instructs high speed. Power failure and generator damage due to overload are prevented.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of a side thruster control device for a ship according to the present invention will be described with reference to FIG. In this embodiment, the thrust is adjusted by the variable pitch propeller,
That is, the structure is such that speed control is performed at the time of landing and landing beams, and FIG. 1 is a conceptual diagram showing the structure of a side thruster control device for a ship. In the figure, the generator 1 is installed in the engine room of a ship, and usually 2 to 3 units are installed.
Only one unit is shown in the figure. The electric power generated by the generator 1 is supplied to the side thruster drive circuit 4 and the inboard general load circuit 5 via the main power supply line 2, the main circuit breaker 3, and the electric power detection means 31. As is apparent from FIG. 1, the power detection means 31
Are arranged in front of the side thruster control circuit 4 and the inboard general load circuit 5. Therefore, the power detection means 31
The electric power detected at is the sum of the electric power consumption of the side thruster drive circuit 4 and the electric power consumption of the inboard general load circuit 5,
In other words, total power consumption.

The side thruster drive circuit 4 includes the circuit breaker 1
1, a starter 12, and a side thruster electric motor 14 are connected in series, and these members are connected by wiring as necessary. The circuit breaker 11 cuts off the power when an accident occurs in the side thruster drive circuit 4, and may be configured not only as a simple cutoff but also as a switch for supplying and cutting off power. The starter 12 is a side thruster electric motor 14 including an AC induction motor.
The side thruster electric motor 14 and the side thruster propeller 15 are directly connected by a transmission shaft 16. The side thruster propeller 15 is provided below the waterline on the side of the bow or stern of the hull, and the side thruster electric motor 14 is installed inside the hull.

The inboard general load circuit 5 comprises a circuit breaker 17 connected to the secondary side of the main circuit breaker 3, a general load 18 including communication equipment, lighting equipment, and cooling equipment.
The main circuit breaker 3, the circuit breakers 11, 17 and the like are arranged in a predetermined distribution box and are connected to respective members by electric wires, which are shown as a circuit system diagram in FIG. Further, as the circuit breaker 17, not only the function of cutting off the power supply but also the one having the switch function may be applied. Furthermore, a circuit breaker may be provided individually for the power supply system of the communication device and the power supply system of the cooling equipment. In any case, the circuit breaker is provided for the sake of safety against electric leakage and the like, and is provided as needed.

The power detecting means 31 is configured to derive the load power amount applied to the generator 1 as a digitized power amount signal V1. The electric energy signal V1 that changes momentarily according to the amount of electric power used is supplied to one input terminal of the side thruster control panel 32 through the signal line L1. In addition, the other input terminal of the side thruster control panel 32 receives a control signal V2 corresponding to the operation of the control handle 22 for attaching / detaching the crosspiece.
It is designed to be supplied via V.2. The control handle 22 corresponds to the control means in the present invention, and the control signal V2 is also output as a digital signal. As the steering handle 22, there is a dial configuration or the like in addition to the configuration including the lever as illustrated.

The side thruster control board 32 has a built-in microcomputer, and performs a predetermined comparison calculation with the electric energy signal V1 corresponding to the detected load electric power and the steering signal V2 corresponding to the operation of the steering wheel 22. The control signal V3 for varying the pitch of the side thruster propeller 15 is supplied to the propeller pitch varying device 24. Propeller pitch variable device 24
Is configured to adjust the pitch of the side thruster propeller 15, that is, the angle at which water is drained, by hydraulic pressure. The hydraulic control is performed by a hydraulic pump (not shown), and a change in power consumption corresponding to the pitch adjustment by driving the hydraulic pump is detected by the power detection means 31. That is, in the configuration of the present embodiment, since the side thruster electric motor 14 has a constant rotation speed, the power consumption is substantially constant. However, when the pitch of the side thruster propeller 15 is adjusted, the power consumption for hydraulic control changes, and this changes in the power consumption for side thruster control, which is detected by the power detection means 31.

Next, the control of the side thruster control device having the above construction will be described. As described above with reference to FIG. 3, when the ship A is to berth and berth on the pier C, the operator operates the steering handle 22 to switch from normal navigation to berthing operation, or from a moored state to berthing operation. . Then, the starter 12 is driven to drive the side thruster electric motor 1.
4 is rotationally driven to rotate the side thruster propeller 15 via the transmission shaft 16 to move the ship A in the lateral direction. When the marine vessel operator operates the operation handle 22 to move the landing gear, the pitch of the side thruster propeller 15 is adjusted to control the moving speed. In this embodiment, the electric energy signal V1 and the control signal V2 are used. Based on this, the following control is performed.

That is, in the configuration of this embodiment, the electric energy signal V1 corresponds to the total electric power consumption in the ship at the time of performing the landing and landing crosspiece, and the electric energy signal V1 and the control signal V2 are combined. The control signal V3 is obtained by comparison calculation. Therefore, when the power consumption is sufficiently smaller than the power generation capacity of the generator 1,
In other words, when the power generation capacity has a sufficient margin, the control signal V3 for obtaining the thrust designated by the control handle 22 is transmitted from the side thruster control panel 23 to the propeller pitch varying device 2
4 and the pitch of the side thruster propeller 15 is adjusted to obtain a desired thrust. On the other hand, when the power consumption is large and there is not enough margin in the remaining capacity of the generator, that is, when the surplus power is small, the control signal V3 is the power amount signal V1 even if the steering signal V2 indicates high thrust. Control signal V2
Therefore, the pitch of the side thruster propeller 15 is adjusted within the range of the remaining capacity of the generator. That is, the take-off and landing rails of the ship A are effectively utilized by using the surplus power, and when the surplus power is large, the quick landing and landing rails are performed, and when the surplus power is small, the surplus power is commensurate with the surplus power. A landing strip will be carried out.

In general, the side thruster take-off and landing bars are easily affected by a headwind or a strong tidal current. In such a case, the electric power equipment that constitutes the general load 18 is temporarily stopped, so to speak, after artificially generating surplus power, the surplus power is used to perform the connecting / disconnecting crosspiece. As a result, the pitch of the side thruster propeller 15 is adjusted so as to obtain a high thrust, and it is possible to quickly perform the take-off and landing bar even in the presence of a head wind. That is, when there is surplus power, the surplus power is effectively used, or within the range of the surplus power, the surplus power is artificially generated in response to the situation at the time of takeoff and landing, and then the surplus power is used. It is possible to take off and landing. Therefore, the ability of the side thruster is improved, and the maneuvering operation at the time of taking off and landing is facilitated, and various advantages such as accidents such as collision with the jetty can be prevented. In addition, even if the steering handle 22 is accidentally controlled to have a high thrust at the time of taking off and landing, the side thruster propeller 15
Is not adjusted to a high thrust pitch, and power failure due to overload can be prevented in advance. That is, although the interlock described in the conventional example is not provided,
The same function as the interlock is achieved. Further, since the electric power is effectively used, the generator 1 can have a small power generation capacity and the power generation capacity of the generator 1 can be fully utilized.

Next, a second embodiment of the present invention will be described with reference to FIG. The main difference between this embodiment and the first embodiment is that a fixed pitch propeller is applied and
The configuration is such that the rotation speed of the side thruster electric motor 14 is controlled to adjust the thrust at the time of attachment / detachment. That is, the configuration from the generator 1 to the main power supply line 2, the main circuit breaker 11, and the power detection means 31 and the circuit configuration of the inboard general load circuit 5 are the same as those in the first embodiment. Also, the power detection means 3
1 and the steering signal V2 obtained from the steering wheel 22 are compared and calculated in the side thruster control panel 32, and a control signal V for thrust adjustment is obtained.
The configuration for obtaining 3 is similar to that of the first embodiment. However, the propeller pitch varying device 24 shown in the first embodiment is not provided, and the control signal V3 indicates that the side thruster electric motor 14 has a rotation speed varying device / starter (hereinafter, simply referred to as a rotation speed varying device). (Abbreviated) 35.

In this embodiment, the side thruster drive circuit 4 is composed of a circuit breaker 11, a rotation speed varying device 35, and an electric motor 14. The rotation speed varying device 35 uses the control signal V
3 controls the frequency of the power supply for driving the electric motor 14, and the electric motor 14 is controlled by performing the frequency control.
It is designed to control the rotation speed of. The electric motor 14 and the side thruster propeller 41 are directly connected by a transmission shaft 16, and the rotation speed of the side thruster propeller 41 is controlled in accordance with the change in the rotation speed of the electric motor 14. The installation position of the side thruster propeller 41 and the installation position of the electric motor 14 are the same as those described in the first embodiment.

Next, the operation at the time of taking off and landing beams will be described. The electric power at the time of taking off and landing beams is detected by the electric power detection means 31, and the electric energy signal V1 is supplied to one of the side thruster control boards 32 through the signal line L1. Is supplied to the input terminal of. Further, by operating the steering handle 22, a steering signal V2 instructing a desired thrust is supplied to the other input terminal of the side thruster control panel 23. The side thruster control board 32 performs a comparison calculation on the electric energy signal V1 and the control signal V2, and supplies the control signal V3 to the rotation speed varying device 35. Since the rotation speed varying device 35 also functions as an activator,
First, the electric motor 14 is started, then frequency control corresponding to the control signal V3 is performed, and the electric motor 14 rotates at the rotation speed corresponding to the controlled frequency. Since the electric motor 14 and the side thruster propeller 41 are directly connected to each other by the transmission shaft 16, the side thruster propeller 41 also rotates with the rotation of the electric motor 14, and the ship A moves in the lateral direction to perform the take-off and landing beams. .

Since the control signal V3 is obtained by the comparison calculation of the electric energy signal V1 and the steering signal V2 at the time of the take-off and landing, the steering wheel 2 is operated when the surplus power is large.
The rotation speed varying device 35 is driven in response to the command No. 2, and the electric motor 14 is also rotated at the commanded rotation speed to perform the take-off and landing bar at a desired speed, that is, at the instructed speed. On the other hand, when the surplus power is small, the control signal V3 corresponds to the surplus power even if the command of the steering wheel 22 is high speed, and the rotation speed varying device 35 is within the range of the surplus power. Frequency control is performed. Therefore, the electric motor 14 also rotates corresponding to the control frequency, and the thrusting rod within the range of the surplus electric power causes the take-off and landing bar to be performed. If a high thrust is required even though the surplus power is small, the power equipment constituting the general load 18 is stopped to increase the surplus power as described in the first embodiment. In this way, the control signal V
3 controls the rotation speed varying device 35 to raise the frequency within the range of the surplus power, and the electric motor 14 shifts to high speed rotation to obtain high thrust.

That is, also in the configuration of this embodiment, it is possible to effectively use the electric power as in the first embodiment, further improve the capability of the side thruster, facilitate the take-off and landing of a jetty, and prevent the collision with the jetty. Preventing generator damage and power failure due to overload,
It is possible to achieve various effects such as downsizing of the generator.

[0030]

As described above, according to the side thruster control device for a ship according to the present invention, the total electric power consumption in the ship is detected by the electric power detecting means, and the electric power value at this time is detected as the electric power amount signal by the side. While being supplied to the thruster control panel, the speed signal instructed by the ship operator is supplied to the side thruster control panel. In the side thruster control panel, the electric energy signal and the speed signal are compared and calculated, and the control signal for controlling the pitch of the variable pitch propeller is supplied to the propeller pitch control device, so the pitch of the variable pitch propeller is adjusted, The speed of the ship is controlled at the time of takeoff and landing. The control signal is obtained by comparing and calculating the speed signal and the electric energy signal corresponding to the total power consumption, so if the total power consumption is small and the difference with the generator's power generation capacity, that is, the surplus power is large, control is performed. The pitch of the propeller is adjusted by the signal so that the vessel can move at high speed, and the take-off and landing vessel operation is carried out by effectively utilizing the surplus electricity. On the other hand, when the total power consumption is large and the surplus power is small, the control signal will change the propeller pitch within the range of surplus power even if the operating means instructs high speed movement, and power failure due to overload And damage to the generator can be prevented. Further, according to the side thruster control device for a ship according to the present invention, the fixed pitch type propeller is directly connected to the induction motor, and the rotation speed of the induction motor is controlled by the frequency control of the rotation speed varying device / starter. ing. Therefore, by changing the frequency of the rotation speed varying device and the starter by the control signal, the rotation speeds of the electric motor and the fixed pitch type propeller are controlled, and the speed control at the time of the take-off and landing bar is performed. The control signal is obtained by comparing and calculating the speed signal and the electric energy signal corresponding to the total power consumption, so if the total power consumption is small and the difference with the generator's power generation capacity, that is, the surplus power is large, control is performed. The rotation speed of the propeller is adjusted by the signal so that the ship can move at high speed, and the take-off and landing boat operation is performed by effectively using the surplus power. On the other hand, if the total power consumption is large and the surplus power is small, the control signal will change the number of revolutions of the propeller within the range of the surplus power even if a high-speed movement is commanded by the steering means.
It is possible to prevent power failure and damage to the generator due to overload.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a configuration of a side thruster control device for a ship according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a configuration of a side thruster control device for a ship according to a second embodiment of the present invention.

FIG. 3 is an explanatory view showing a state of a take-off and landing bar of a ship.

FIG. 4 is a conceptual diagram showing a configuration of a conventional side thruster control device for a ship.

[Explanation of symbols]

 1 Generator 2 Main Power Supply Line 3 Main Circuit Breaker 4 Side Thruster Drive Circuit 5 Inboard General Load Circuit 11, 17 Circuit Breaker 12 Starter 14 Side Thruster Motor 15 Variable Pitch Propeller 16 Conduction Shaft 18 General Load 22 Control Wheel 24 Propeller Pitch changing device 31 Electric power detecting means 35 Rotation speed changing device / starter 41 Fixed pitch type propellers L1 and L2 Signal lines V1 Electric energy signal V2 Speed signal V3 Control signal A Ship

Claims (2)

[Claims] 1. A propeller 15 for at least a variable pitch side thruster, and an electric motor 14 provided inside the ship A for rotationally driving the propeller 15 for side thruster,
A side thruster control device for a ship, comprising a control means 22 for maneuvering the ship A and a generator 1 for supplying electric power into the ship A, wherein a power amount signal corresponding to the total power consumption in the ship A The electric power detection means 31 for detecting V1 and the electric power amount signal V1 and the speed signal V2 output according to the command from the control means 22 are compared and calculated, and the total electric power generated by the generator 1 is calculated. When the power consumption is small and there is surplus power, it corresponds to the speed signal V2, and when the total power consumption is large and there is no surplus power, the control signal V3 is set within the range of the remaining capacity of the generator.
Side thruster control panel 32 for outputting a side thruster control panel 32 and a propeller pitch varying device 24 for controlling the pitch of the variable pitch type side thruster propeller 15 based on the control signal V3. apparatus. 2. A fixed-pitch side thruster propeller 41 at least, and an electric motor 14 provided inside the ship A for rotationally driving the side thruster propeller 41.
A side thruster control device for a ship, comprising a control means 22 for maneuvering the ship A and a generator 1 for supplying electric power into the ship A, wherein a power amount signal corresponding to the total power consumption in the ship A The electric power detection means 31 for detecting V1 and the electric power amount signal V1 and the speed signal V2 output according to the command from the control means 22 are compared and calculated, and the total electric power generated by the generator 1 is calculated. When the power consumption is small and there is surplus power, it corresponds to the speed signal V2, and when the total power consumption is large and there is no surplus power, the control signal V3 is set within the range of the remaining capacity of the generator.
The side thruster control device for a ship, comprising: a side thruster control panel 32 for outputting the control signal, and a rotation speed varying device / starter 35 for controlling the drive power supply frequency of the electric motor 14 based on the control signal V3. .