JPH04114730U - Bow thruster control device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a bow thruster used for ship maneuvering, and specifically aims to provide a bow thruster control device that can prevent overloading of a generator serving as a power source for the bow thruster. [Structure] The bow thruster control device of the present invention includes a bow thruster equipped with an electric motor-driven impeller 5 having a blade angle adjustment mechanism 3, a generator 1 capable of supplying power to an electric motor 4 that drives the impeller 5, and the generator 1. an overload detection circuit 2 capable of detecting an overload state of the overload state; and a bow thruster control capable of controlling a blade angle adjustment mechanism 3 to reduce the blade angle of the impeller 5 based on a detection signal from the overload detection circuit 2. It is characterized by having a circuit 6. This prevents overloading of the generator due to changes in the bow thruster impeller blade angle, and suppresses selective interruption of other loads.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a bow thruster used for ship maneuvering, and in particular, the power source of the bow thruster. Regarding a bow thruster control device that can prevent overload of a generator. .

0002

[Conventional technology]

In the conventional bow thruster control device, as shown in Fig. 3, when using the bow thruster, is a plurality of generators as a power source for electric motor M that drives the impeller of the bow thruster. G is in a parallel operation state, and in that state, the negative When the total load increases, the overload detector (OCR) of generator G is activated and the load When the total amount exceeds the set value, circuit breaker A or circuit breaker B is activated to protect generator from the overload detector OCR in order to disconnect loads unrelated to the propulsion of the connected vessel. The signal was used to open circuit breaker A or circuit breaker B, thereby shedding the load.

0003

[Problem that the idea aims to solve]

By the way, in the conventional bow thruster control device as mentioned above, the bow thruster The relationship between the load fluctuation of the generator G due to the blade angle displacement of the impeller and the above impeller blade angle control circuit is as follows. Since there was no electrical connection, the generator would be overloaded if the blade angle increased. The load acts, which immediately leads to selective shedding of loads unrelated to propulsion. There is a problem.

0004 This invention attempts to solve these problems, and is designed to prevent overloading of generators. The impeller of the bow thruster is adjusted according to the signal amount exceeding the set value of the signal from the detector. A bow thruster that reduces the load on the generator by lowering the blade angle. The purpose of the present invention is to provide a star control device.

[0005]

[Means to solve the problem] In order to achieve the above object, the bow thruster control device of the present invention has a blade angle adjustment mechanism. A bow thruster equipped with an electric motor-driven impeller having a A generator that can supply power to a moving electric motor, and an overload that can detect the overload condition of the generator. The blade angle of the impeller is determined based on the detection circuit and the detection signal from the overload detection circuit. and a bow thruster control circuit that can control the blade angle adjustment mechanism to reduce the blade angle. It is characterized by the fact that

[0006]

[Effect]

In the bow thruster control device of the present invention described above, the blade angle change of the impeller of the bow thruster is Detects the overload condition of the generator due to the increase in load due to Based on this, an action is taken to reduce the blade angle of the impeller.

[0007]

【Example】

Below, a bow thruster control device as an embodiment of the present invention will be explained with reference to the drawings. Specifically, FIG. 1 is a system diagram showing the outline thereof, and FIG. 2 is a flowchart of its control.

[0008] As shown in Fig. 1, in this embodiment, the bow thruster is used as a blade angle adjustment mechanism. It is composed of an impeller 5 having a control hydraulic system 3 and an electric motor 4 that drives the impeller. It is. Then, the electric motor 4 is supplied with power from the generator 1, and the generator 1 is overloaded. Overload detection circuit (OCR: overcurrent relay) 2 that can detect It is provided on the generator 1 side inside.

[0009] Furthermore, the blade angle of the impeller 5 is decreased based on the detection signal from the overload detection circuit 2. A bow thruster control circuit 6 is provided that can control the blade angle control hydraulic system 3 to It is being

0010 With this configuration, the blade angle of the impeller 5 is controlled according to the flow shown in FIG. be exposed. In other words, during bow thruster operation, the blade angle of the impeller 5 of the bow thruster The overload detection circuit 2 detects the load of the generator 1 that fluctuates due to displacement, etc. exceeds the set current value, the bow thrust is activated based on the detection signal from the overload detection circuit 2. The blade angle control hydraulic system 3 is activated by the control signal it outputs. The blade angle is reduced to reduce the load on the propeller 5. In addition, overload detection The overcurrent setting device for output is variable and can be set as appropriate depending on the condition of each ship.

[0011] In this way, the power generation generated by increasing the blade angle of the impeller 5 of the bow thruster Prevents selective cutoff of other loads when aircraft 1 is overloaded, allowing safe and comfortable voyage to continue. can do.

0012

[Effect of the idea]

As detailed above, according to the bow thruster control device of the present invention, the bow thruster load selection can be prevented when the generator is overloaded due to the displacement of the impeller blade angle. This has the effect of allowing you to continue your voyage safely and comfortably.

[Brief explanation of drawings]

FIG. 1 is a system diagram schematically showing a bow thruster control device as an embodiment of the present invention.

FIG. 2 is a flowchart of control of the bow thruster control device shown in FIG. 1;

FIG. 3 is a circuit diagram of a conventional bow thruster control device.

[Explanation of symbols]

1 Generator 2 Overload detection circuit 3 Wing angle control hydraulic system 4 Electric motor 5 impeller 6 Bow thruster control circuit

Claims (1)

[Scope of utility model registration request] 1. A bow thruster equipped with a motor-driven impeller having a blade angle adjustment mechanism, a generator that can supply power to the electric motor that drives the impeller, and an overload detector that can detect an overload state of the generator. and a bow thruster control circuit capable of controlling the blade angle adjustment mechanism to reduce the blade angle of the impeller based on a detection signal from the overload detection circuit. .