JPH1094296A - Power supply with power supply function for anti-rolling machine of small vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply having power supply function for operating an anti-rolling machine stably even under idling state of an engine for driving a generator. SOLUTION: A controller 14 for an AC three-phase generator 2 being driven by an enqine 1 for a motor driving the rotary section (rotor) of a vessel-mounted ant-rolling machine is provided with an overcurrent limiting function of DC load current including the charging current of a battery 4 being used as an auxiliary power supply, and an overcurrent limiting function of supply current to a DC motor 8 for driving the rotor. Preferably, a DC power supply voltage of a DC motor 8 is formed by a voltage converting function for converting the output voltage from the generator 2 into a predetermined voltage 6 and a rectifier circuit 7. An auto-transformer 6 having at least one tap terminal may be used as the voltage converting function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an engine for driving a power generator optimal for a power reducer mounted on a small boat, the engine having a rotating mass parallel to the charging of a battery even in an idling state. The present invention relates to a power supply device having a power supply function for a vibration reducer of a small boat having a performance capable of stably starting a large vibration reducer.

[0002]

2. Description of the Related Art The drive function of a rocker provided in a small boat is configured, for example, as shown in FIG. A three-phase AC generator 32 is connected to the engine 1, and the power output of the generator 32 is rectified by a rectifier circuit 33 and connected to, for example, a 24-volt battery 34. The terminal voltage of the battery 34 is DC
A predetermined voltage, for example, 48
The DC motor 8 is boosted to a volt and is used to drive an anti-oscillator rotating unit (gyro-stabilizer wheel, hereinafter referred to as a frame). The top 9 is driven by the DC motor 8. The generator 32 is controlled by a generator control device 36 having a predetermined function such as a constant voltage control function. The DC / DC converter 35 has an overcurrent limiting function for limiting the supply current of the DC motor 8 for driving the frame.

[0003]

By the way, the rocker is
A gyro stabilizer, such as a control moment gyro, having a function of controlling a gyro torque required to prevent the swing of a ship having a large mass. It is. Since a motor having a large output is required to start such a frame having a large moment of inertia from a stopped state, a motor having a performance capable of obtaining a desired output is also driven at the time of starting. That is, at 24 volts as a DC power supply in a ship,
Since a motor having a necessary output cannot be obtained, the voltage is increased to 48 volts by a DC / DC converter and used.
Further, for example, two electric motors may be operated in parallel. However, at the time of starting the rocker, as described above, an excessive current is required for driving the motor that can quickly start up, and it is difficult to employ a motor that can obtain such an output. . Therefore, the characteristics at the time of starting are as shown in FIG. FIG. 5A shows a change in the rotation speed at the time of starting, and FIG. 5B shows a change in the output of the generator corresponding to the change in the rotation speed at the time of starting. That is, since the drive current of the DC motor 8 for frame driving (motor current) is initially start the output value by an overcurrent limiting function provided in the DC / DC converter 35 is limited to a predetermined value I _L,
Time t when starting at time t0 and reaching steady rotation speed Ns
It takes several tens of minutes, preferably about 30 minutes by one. When the frame reaches the steady rotation speed at time t1, the drive current of the DC motor 8 for driving the frame decreases to a predetermined value _ID .

[0004] The rocker according to the present invention is mainly operated when the onboard vessel stops. When the ship stops, the engine is stopped or kept idling.
As shown in FIG. 5C, the generator output corresponding to the engine rotation speed has a maximum rotation speed n2 of, for example, 2500r.
At pm, the rated output Ps is, for example, 1.5 KW, but the rotational speed n1 in the idling state does not reach, for example, 550 rpm, the output Pj required to drive the top, for example, 1 KW. for that reason,
Since the rotating power of the top must be obtained from the battery, it was necessary to mount a large-capacity battery or, if it was unavoidable, to stop the operation of the rocker. Due to the above conditions and the like, there were the following problems. (1) A fairly expensive DC / DC converter having a large output and a current limiting function is required. (2) If motors with different rated voltages are required according to the conditions of the ship on which the anti-oscillator is mounted, etc., it is difficult to change the characteristics of the DC / DC converter, etc., so that the DC / DC converter cannot be standardized. . (3) In the idling state of the engine, electric power obtained from the generator is not sufficiently obtained, and it is difficult to cope with the operation of the vibration reducer. The present invention solves the above-mentioned problems (problems) of the conventional device, and provides a power supply device having a power supply function capable of stably operating an anti-oscillator even when an engine used for driving a generator is idling. With the goal.

[0005]

SUMMARY OF THE INVENTION The above-mentioned problems (problems) are attained by the power supply device of the present invention having a power supply function for a small ship rocker.
In order to solve the above problem, in a power supply device having a power supply function for a frame drive motor mounted on a ship, a DC load including a charge flow of a battery used as an auxiliary power supply is provided to a control device of an AC generator driven by an engine. It is configured to have a current overcurrent limiting function and a frame drive motor supply current overcurrent limiting function. In this case, it is desirable to form and supply the DC power supply voltage of the motor for driving the frame by a rectifier circuit and a voltage conversion function for converting the generator output voltage to a predetermined voltage.
By doing so, the conventional DC with overcurrent limiting function
Since the circuit can be constituted by a simpler circuit than the / DC converter, the reliability can be increased and the cost can be reduced, and a frame driving motor having a different voltage can be easily handled. When a single-winding transformer having at least one tap terminal is used as the voltage conversion function, the voltage can be converted with a simple configuration. Further, when the power supply device has a constant voltage function, stable operation of the rocker can be performed. In addition, even if the engine is equipped with a generator capable of outputting a predetermined power corresponding to the power supplied to the frame drive motor even when the engine is idling, the engine of the ship equipped with this anti-oscillator will start reliably even in the idling state. And continuous operation can be performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to one embodiment shown in FIGS. FIG. 1 is a block diagram showing a schematic electric system of a ship including a power supply device according to the present invention. In the prior art, the same functions as those shown in FIG. The mechanical connection, the three wire description part is the three-phase AC power circuit, the one thick line is the DC power line, the one thin line is the signal circuit, the return line of the DC power circuit and the signal circuit The illustration of ground lines and other element functions not directly related to the description of the present invention is omitted. In FIG. 1, a three-phase AC generator (hereinafter simply referred to as a generator) 2 is coupled to an engine 1,
Is the first output for detecting the supply current value of the top drive motor.
And a three-phase single-winding transformer 6 having a boost function via a current value detector 11 (hereinafter abbreviated as a first CT), and a second circuit for detecting a DC circuit load current value including a charging current of the battery. Is connected to a DC load rectifier 3 for obtaining DC power to be supplied to a DC load via a current value detector 12 (hereinafter abbreviated as a second CT). The rectified output of the rectifier 3 for DC load is supplied to a battery 4 of a predetermined voltage, for example, 24 volts, and various DC loads 5, and the battery 4 is charged by the rectifier 3 for DC load and operates in a floating state. The rectified output of the DC load rectifier 3, that is, the terminal voltage of the battery 4 is input to the voltage detector 13. The output of the three-phase single-winding transformer 6 boosted to a predetermined voltage is connected to a rectifier 7 for obtaining DC power for driving a frame drive motor, and the obtained DC power is supplied to a DC motor 8 for driving the frame. Supply. The DC motor 8 is connected to the top 9.

The detection outputs of the first and second CTs 11 and 12 and the detection output of the voltage value detector 13 are input to a control function 14 for a three-phase AC generator, and are controlled by a signal processing function described in detail later. , A field current of the generator 2 is created and supplied to the generator 2. The control function 14 includes an operation switch 14
a, a pilot lamp 14b and the like. The above-described generator 2 has the characteristics shown in FIG. In FIG. 2, curves a and b respectively show the characteristics of the generator employed in the embodiment of the present invention. The curve c is shown in FIG.
Shows the characteristics of the conventional generator shown in FIG. That is, the curve a
In the case of the characteristic (1), a predetermined rated power Ps is output even when the rotational speed n1 of the engine in the idling state is, for example, 550 rpm. In the case of the characteristic of the curve (b), the power Pj required to drive the frame is satisfied. . As described above, the control function 14 uses the rated voltage and the rated output Ps so that the generator does not generate an excessive output even if the rotation speed of the engine is increased, regardless of whether the generator having any of the characteristics of the curves a and b is used. Control is performed so as not to output any more. Therefore, at the rated engine speed n2, a rated output Ps equivalent to that of the conventional generator can be obtained.

Next, the control function 14 will be described in detail with reference to FIG. In FIG. 3, as in FIG. 1, illustration of the ground circuit and other element functions not directly related to the circuit description is omitted. In the figure, an output circuit of a generator 2 coupled to an engine (not shown) is connected to a three-phase single-winding transformer 6 via a first CT 11. Note that the subsequent circuits are not shown because they are not directly related to the description of the control function based on the present invention. The three-phase single-winding transformer 6 is used to convert the generated voltage of the generator 2 into the rated voltage for driving the DC motor 8 for driving the frame, and to determine the required characteristics of the ship on which the anti-oscillator is to be mounted. Taps may be provided corresponding to the required performance of the corresponding frame drive function so that the output voltage can be changed and set. The output circuit of the generator 2 also includes a second CT1
2 is connected to a rectifier 3 for DC load. A rectified output (hereinafter referred to as a first power supply output) B1 of the rectifier 3 for a DC load includes a battery 4 and a stable predetermined voltage, for example, DC 12
The voltage is supplied to a constant voltage circuit 15 for obtaining volts, a voltage value detector 13 and the like.

The voltage detector 13 is a voltage divider constituted by, for example, a resistor, and detects a rectified output voltage of the rectifier 3 for DC load to be inputted into a constant voltage control circuit 13A described later.
Is converted into a voltage corresponding to the reference signal voltage for comparison, and connected to the comparison signal input circuit P1 of the constant voltage control circuit 13A. An output (hereinafter, referred to as a second power supply output) B2 of the constant voltage circuit 15 is divided by resistors 20 and 21 having a predetermined value to create a reference signal voltage of the constant voltage control circuit 13A, and the reference signal voltage is a constant voltage. It is input to the reference signal input circuit P2 of the control circuit 13A. The detection circuit of the first CT 11 is connected to the comparison signal input circuit of the first overcurrent limiting circuit 11A,
Is connected to the comparison signal input circuit of the second overcurrent limiting circuit 12A. The illustration of the reference signal generating circuits of the first overcurrent limiting circuit 11A and the second overcurrent limiting circuit 12A is omitted. The output circuit of the constant voltage control circuit 13A is via a first diode 16, the output circuit of the first overcurrent limiting circuit 11A is via a second diode 17, and the output circuit of the second overcurrent limiting circuit 12A is 3 are connected to the control input circuit of the generator field current driver 2A via three diodes 18, respectively. The generator field current driver 2A may use, for example, a semiconductor amplifying element suitable for controlling the supply of the generator field current, such as an FET or a transistor. First to third diodes 1
6, 17, and 18, together with the resistors 22 and 23 connected to the control input circuit of the generator field current driver 2A, form an AND gate circuit. Generator field current driver 2A
Is connected to the first power supply output B1 via the field coil 2a of the generator 2. The field coil 2a connects a flywheel diode 19 in parallel.

In the above-described circuit configuration, even if the operation of the generator 2 is stopped or started, the voltage of the first power supply output B1 remains as long as the output voltage is equal to or less than the terminal voltage of the battery 4, for example, 24 volts. Is equal to the battery voltage, but when the output voltage of the generator 2 rises and becomes 24 volts or more, the voltage of the first power supply output B1 becomes equal to the output voltage of the generator 2. When the output voltage of the generator 2 increases and the voltage of the first power supply output B1 increases and the comparison signal voltage value input to the constant voltage control circuit 13A becomes larger than a reference voltage value, for example, 27 volts, the constant voltage The output voltage of the control circuit 13A becomes low, and the first to third diodes 16, 17, 18 and the resistor 2
Since the input voltage of the generator field current driver 2A becomes low by the function of the AND gate circuit formed by the generators 2 and 23, the operation of the generator field current driver 2A is turned off, and the field coil 2a of the generator 2 is turned off. Since no field current is supplied, the generated voltage of the generator 2 drops. When the voltage of the first power supply output B1 drops and the comparison signal voltage value input to the constant voltage control circuit 13A becomes smaller than the reference voltage value, the constant voltage control circuit 13
A becomes high, and the first overcurrent limiting circuit 11
A and the respective output voltages of the second overcurrent limiting circuit 12A are:
When each current value to be measured is in a steady state, each output voltage is high. Therefore, the generator field current is controlled by the function of the AND gate circuit formed by the first to third diodes 16, 17, 18 and the resistors 22, 23. The input voltage of the driver 2A becomes high,
The operation of the generator field current driver 2A is turned on, current is supplied to the field coil 2a of the generator 2, and the generated voltage of the generator 2 increases. By the above operation, the generator 2 always outputs a voltage value set by the reference voltage value input to the constant voltage control circuit 13A, for example, 27 volts. Therefore, the first
27 volts is constantly supplied to a load circuit (not shown) supplied from the power supply output B1 of, and a charging current flows to a 24 volt battery. Further, when a generator having the characteristics of the curve a or b shown in FIG. 2 is used, even if the engine rotates at an arbitrary rotational speed between the idling state n1 and the rated rotational speed n2, the vibration reducer can be used. Is supplied with the electric power Pj or more necessary for the operation. Further, when a generator having the characteristic of the curve a shown in FIG. 2 is used, the frame drive is performed even if the engine rotates at an arbitrary rotational speed between the rotational speed n1 in the idling state and the rated rotational speed n2. DC motor (not shown in FIG. 3) is supplied with a constant voltage of 48 volts.

When the frame drive motor supply current at the time of starting the rocker is increased, the comparison signal value input to the first overcurrent limiting circuit 11A, that is, the measured value of the frame drive motor supply current is a reference signal value. For example, when the output voltage exceeds the value corresponding to 22 amps, the output voltage of the first overcurrent limiting circuit 11A becomes low, and the AND gate circuit formed by the first to third diodes 16, 17, and 18 and the resistors 22, 23 is formed. The input voltage of the generator field current driver 2A becomes low by the action of
The operation of the generator field current driver 2A is turned off, the supply current of the field coil 2a of the generator 2 is stopped, and the generated voltage of the generator 2 drops. Therefore, the current supplied to the top drive motor decreases. When the frame drive motor supply current decreases and the comparison signal value input to the first overcurrent limiting circuit 11A becomes smaller than the reference signal value, the output voltage of the first overcurrent limiting circuit 11A becomes high and the constant voltage becomes constant. The output voltage of each of the control circuit 13A and the second overcurrent limiting circuit 12A is high if the voltage value of the first power supply output B1 and the input current value of the rectifier 3 for DC load are normal. Diode 16,
The input voltage of the generator field current driver 2A becomes high by the operation of the AND gate circuit formed by the resistors 17 and 18 and the resistors 22 and 23, the operation of the generator field current driver 2A is turned on, and the field coil 2a is turned on. Is supplied to the generator 2 and the generated voltage of the generator 2 rises. Therefore, the current supplied to the frame drive motor increases. That is, the first overcurrent limiting circuit 11A has an overcurrent limiting function so that the frame drive motor supply current operates at, for example, 22 amperes or less.

As the DC load increases, the value of the comparison signal input to the second overcurrent limiting circuit 12A, that is, the measured value of the DC load current including the charging current of the battery 4, becomes larger than the reference signal value, for example, a value corresponding to 12 amps. When the voltage increases, the output voltage of the second overcurrent limiting circuit 12A becomes low, and the field of the generator is generated by the function of the AND gate circuit formed by the first to third diodes 16, 17, 18 and the resistors 22, 23. Since the input voltage of the current driver 2A becomes low, the generator field current driver 2A
The operation of A is turned off, the supply current of the field coil 2a of the generator 2 is stopped, and the generated voltage of the generator 2 drops. Therefore, the current supplied to the top drive motor decreases. When the DC load current value decreases and the comparison signal value input to the second overcurrent limiting circuit 12A becomes smaller than the reference signal value, the output voltage of the second overcurrent limiting circuit 12A becomes high, and the constant voltage control is performed. Since the output voltage of each of the circuit 13A and the first overcurrent limiting circuit 11A is high if the voltage value of the first power supply output B1 and the supply current value of the frame drive motor are normal, the first to third diodes 16, The generator field current driver 2A is operated by an AND gate circuit formed by the resistors 17 and 18 and the resistors 22 and 23.
Input voltage goes high. Accordingly, the operation of the generator field current driver 2A is turned on, the current is supplied to the field coil 2a, the voltage generated by the generator 2 increases, and the DC load current value increases. That is, the second overcurrent limiting circuit 12A has an overcurrent limiting function such that the DC load supply current including the charging current of the battery 4 operates at, for example, 12 amps or less.

By the above function, for example, the constant voltage control circuit 13A and the first and second constant voltage control circuits 13A and 13B are controlled so that the DC load power including the battery charging current of the 27 volt system and the power supplied to the frame drive motor do not exceed 1 KW, respectively. Overcurrent limiting circuit 11
If the generator 2 has a performance capable of outputting 2 kW in the engine idling state, the rotation of the frame can be started and the battery can be charged even in the idling state. However, when the starting current value of the frame drive motor is larger than the set value of the first current limiting circuit 11A, the generated voltage of the generator 2 is temporarily limited by the function of the first current limiting circuit 11A. The voltage drops below the rated value set by the circuit 13A, the rotational speed of the frame drive motor increases, and the voltage returns to the rated voltage as the starting current value decreases. In this case, when the rectified output of the DC load rectifier 3 becomes 24 volts or less, power is supplied from the battery 4 to the DC load (not shown).

The present invention is not limited to the above-described embodiment, but may be applied to the function and performance of the vibration reducer corresponding to the conditions of the onboard ship and the characteristics of the motor and the generator of the vibration reducer. It may be configured appropriately. For example, the characteristics of the constant voltage control circuit and each overcurrent limiting circuit may be such that desired characteristics can be obtained. That is, it has been described that the outputs of the constant voltage control circuit and the respective overcurrent limiting circuits are supplied to the generator field current driver 2A via the AND gate circuit. Modifications such as forming a constant current control circuit corresponding to necessary characteristics are possible. Also, an example has been described in which a single winding transformer is provided as a voltage conversion function in order to form and supply a DC power supply voltage of a motor for driving a frame, but a normal transformer is used instead of a single winding transformer. Or any other suitable means including a rectifying function. In addition, if a necessary condition of the motor for driving the frame, for example, low power is sufficient, the voltage conversion function may not be provided. Furthermore, although FIG. 3 has been described in which each functional circuit is configured by hardware, it is obvious that software processing may be executed using a computer.

[0015]

As described above, the power supply device of the present invention having the power supply function for the anti-roller of a small boat has the following excellent effects. (1) An output control device of a generator driven by an engine has an overcurrent limiting function of a DC load current including a charging power source of a battery used as an auxiliary power source, and an overcurrent limit of a current supplied to a motor for driving a vibration reducer rotating unit. Since the function is provided, it is possible to prevent the output current value of the generator from being excessively large by individually managing the DC load current and the supply current of the motor for driving the rocking unit (coma). (2) Since a conventional DC / DC converter having an overcurrent limiting function is replaced with a function of converting a supply voltage value of a frame drive motor and a rectifying diode, an appropriate DC voltage can be obtained with a simple circuit. Thus, the reliability of the device is improved and the cost can be reduced. (3) By replacing a conventional DC / DC converter having an overcurrent limiting function with a function of converting a supply voltage value of a frame drive motor and a rectifying diode, it is possible to easily cope with a frame drive motor having a different voltage. (4) If a single-winding transformer is used as the function of converting the supply voltage value of the frame drive motor, the required voltage can be easily and reliably converted to the required voltage. (5) If the power supply device is provided with a constant voltage function, stable operation such as reliable control of the anti-roller can be performed so that gyro torque corresponding to a wave condition or the like can be obtained. (6) If the motor of the power supply device is designed to have a performance of outputting a predetermined power suitable for starting the frame drive motor even when the engine is idling, the engine of the ship equipped with the anti-oscillator will be idling. Even in the state, the start and the continuous operation of the rocker can be reliably executed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic electric system of a ship equipped with a rocker including a power supply device according to the present invention.

FIG. 2 is a diagram illustrating characteristics of a three-phase AC generator optimal for a rocker according to the present invention.

FIG. 3 is a schematic block diagram illustrating a configuration example of a control function of a generator optimal for the electric system illustrated in FIG. 1;

FIG. 4 is a block diagram showing a schematic electric system of a ship equipped with a conventional power source function for a rocker.

FIGS. 5A and 5B are characteristic diagrams of a frame driving electric motor for explaining a problem of a conventional power source function for a rocker, and FIG. 5A is a starting characteristic diagram and FIG. FIG. 2B is a current characteristic diagram at the time of starting, and FIG. 2C is a characteristic diagram of a three-phase AC generator for explaining a problem of a conventional power supply function for an oscillator.

[Explanation of symbols]

 1: engine 2: three-phase alternating current generator 3: rectifier for DC load 4: battery 5: DC load 6: three-phase single-winding transformer (voltage conversion function) 7: rectifier (rotary unit (coma) drive of anti-roller) 8: DC motor for driving the frame 9: Frame (rotating section of the rocker) 11, 12: Current value detector (first and second CT) 11A, 12A: First and second overcurrent Limiting circuit 13: Voltage detector 13A: Constant voltage control circuit 14: Control function for three-phase AC generator 15: Constant voltage circuit

Claims (5)

[Claims] 1. A power supply device having a power supply function for a motor for driving a swinging unit rotating section (gyro-stabilizer wheel, hereinafter referred to as a frame) mounted on a ship, the control device for an AC generator driven by an engine. Power supply function for an anti-roller of a small boat, provided with an overcurrent limiting function for a DC load current including a charging current of a battery used as an auxiliary power supply and an overcurrent limiting function for a top drive motor supply current. Power supply with. 2. A DC power supply voltage for a frame driving motor is formed and supplied by a rectifier circuit and a voltage conversion function for converting the generator output voltage to a predetermined voltage.
A power supply device having a power supply function for a rocker of a small boat according to the above. 3. The voltage conversion function according to claim 1, wherein at least one
3. A power supply device having a power supply function for an anti-roller of a small boat according to claim 2, comprising a single-winding transformer having the tap terminal. 4. The power supply device having a power supply function for a vibration reducer of a small boat according to claim 1, further comprising a constant voltage function. 5. The small boat according to claim 1, further comprising: the generator having a function of outputting a predetermined power corresponding to the power supplied to the frame driving motor even when the engine is idling. Power supply device with power supply function for the rocker.