JP3202560U - Power generation system - Google Patents

Abstract

A power generation system capable of stably supplying power to a main battery and a load while reducing driving torque of a motor. A motor driving battery 1 is used as a driving power source of a motor 2, electric power is generated in a generator 3 connected to the motor 2 via a coupler 10, and a flyhole 11 is fixed to an output shaft of the generator 3. Then, a rotational inertia force is applied to the rotor of the generator 3, the generated power of the generator 3 is converted into DC by the AC / DC converter 4, and the DC power converted by the AC / DC converter 4 is used for driving the motor. The battery 1 and the electric double layer capacitor 6 are charged, and the batteries 8a to 8c constituting the main battery 8 can be charged via the changeover switches 7a to 7c of the charge / discharge switch 7, and the batteries 8a to 8c are charged. In this configuration, the charged power can be discharged to the load 12 via the charge / discharge switching device 7. [Selection] Figure 1

Description

  The present invention relates to a power generation system that generates electric power in a small generator by using a rotary inertia force of a flywheel.

  With the increase in carbon dioxide associated with mass consumption of fossil fuels, global warming associated with this increase in carbon dioxide, and the depletion of resources are inevitable, the development and utilization of alternative energy for fossil fuels has become a reality. It is coming. On the other hand, technology development for saving the consumption of the fossil fuel is being carried out in parallel.

  Incidentally, in addition to the fossil fuels described above, power generation systems that utilize natural energy such as hydropower, wind power, and even geothermal heat have been developed and realized. In a generator of such a power generation system, a rotor with a magnet is arranged around a stator provided with a stator winding for power generation, and a voltage induced in the stator winding during rotation of the rotor is externally provided. It is taken out and supplied to a load or the like. In this generator, in order to generate electric power, it is necessary to rotate the rotor with magnet relative to the stator winding, and in order to rotate this rotor, a motor for driving the generator, a water wheel, a windmill, A turbine is required. In particular, in a motor-driven power generation system in which a generator is driven by a motor, it is necessary to continue supplying power to a dedicated motor for driving the generator.

  However, the power supplied to the dedicated motor for driving the generator requires a large amount of power that is sufficient and sufficient to continuously generate sufficient driving torque for this motor. However, there was an inconvenience that it was extremely bad.

  The present invention solves the above-mentioned conventional problems, and its purpose is to provide a flywheel effect to the rotor of the generator and to rotate the flywheel within a rotation range exceeding the set torque. Sufficient energy (rotational inertial force) is accumulated, and when rotating unstable due to an increase in generator load, etc., the accumulated rotational energy of the flywheel is released to keep the generator rotation stable. An object of the present invention is to provide a device that enables use of a small motor having a relatively small driving torque. In addition, at a timing at which rotational energy can be sufficiently stored in the flywheel, a small motor can be obtained by charging a plurality of main batteries on the load side while supplying the power generated by the generator as surplus power to the generator driving battery. An object of the present invention is to provide a power generation system capable of sustaining stable operation of a load by discharge power of a main battery while suppressing the use of external power for driving as much as possible.

In order to achieve the above object, a power generation system according to the present invention includes a motor drive battery used as a drive power source for a motor, and a generator connected to the motor via a coupler and rotating together with the motor to generate electric power. A flywheel that is fixed to the output shaft of the generator and applies a rotational inertial force to the rotor during the rotation of the generator; an AC / DC converter that converts the generated power of the generator into a direct current; A charger that charges the motor-driven battery and the electric double layer capacitor with the electric power converted into direct current by the AC / DC converter, and is connected to the charger via a charge / discharge switching device, and charges the DC-converted power. And a main battery that allows this charged power to be discharged to the load,
It is characterized by comprising.

  With this configuration, the motor is driven by receiving electric power through the motor driving battery, and the generator connected to the motor via the coupler is also driven at the same speed. The AC power generated by driving the generator is converted into DC power by an AC / DC converter, stored in the electric double layer capacitor through the charger, and also charged in the motor driving battery. If the capacity of the battery for driving the motor is sufficient, the plurality of main batteries are charged as surplus power through the charger and the charge / discharge switcher and are also supplied to the load. The charge / discharge switcher is closed when the main battery is charged and when the generator voltage is reduced. When power supply to the load becomes necessary, one of the charge / discharge switchers is opened.

  Since the rotation speed of the motor is not sufficiently raised at the start of the motor, the power generated by the generator is also unstable, and the DC power obtained through the power converter is driven by the electric double layer capacitor and the motor drive. It is only supplied to the main battery, and supply to the main battery and the load is not started. On the other hand, after the rotational speed of the motor has risen sufficiently, the motor is driven in the stable speed region and higher speed region together with the generator due to the rotational inertia of the flywheel.

  At this time, the electric power generated by the generator includes the electric power based on the rotational inertia of the flywheel, and compensates the motor driving torque by the electric power based on the rotational inertia, thereby reducing the load on the motor driving battery. In addition, surplus power exceeding the power required by the electric double layer capacitor and the motor drive battery is supplied to the load and the main battery among the power generated by the generator as the flywheel rotates. The electric power charged in the main battery is continuously supplied to the load through the charge / discharge switching device when the generator voltage drops or becomes unstable. Therefore, the load can continue to operate stably.

  According to the present invention, in a region where the flywheel exceeds the set rotational speed of the small generator, a rotational force accompanying the rotational inertia is generated, and the electric power generated by the small generator accompanying the rotational inertia is charged to the motor drive battery. In addition to reducing the driving torque of the motor, the main battery is charged and the discharge power of the main battery is stably supplied to the load.

  The present invention has been briefly described above. Further, the best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

1 is a circuit diagram illustrating a power generation system according to an embodiment of the present invention. It is explanatory drawing which shows notionally the generator in this invention.

  Hereinafter, a power generation system according to an embodiment of the present invention will be described with reference to FIG.

FIG. 1 shows a circuit configuration of a power generation system according to the present embodiment. This power generation system includes a motor driving battery 1, a motor 2, a generator 3, an AC / DC converter 4, a charger 5, an electric double layer capacitor 6, a charge / discharge switching device 7, a main battery. 8 and is configured. Of these, the motor drive battery 1 has sufficient capacity to start up the rotation of the motor (DC motor) 2 until it reaches a predetermined speed with a predetermined starting torque, and to allow the rotation to continue for a set time. It is a storage battery.
The motor driving battery 1 is connected in series to the motor 2 via a motor start switch 9. The motor activation switch 9 is switched on when the motor 2 is activated, and supplies electric power generated by the motor driving battery 1 to the motor 2.

  A generator 3 is connected to the motor 2. Specifically, the output shaft of the motor 2 is coaxially connected to the input shaft of the generator 3 via a coupler (or clutch mechanism) 10 so that the rotational force of the motor 2 is directly transmitted to the generator. ing. A flywheel 11 made of iron, steel, or an alloy containing these is fixed to the output shaft of the generator 3 so that a large rotational inertia force can be applied to the rotor when the generator 3 is driven. ing. Therefore, when the rotational speed of the generator 3 reaches the set range, the motor 2 that drives the generator 3 does not generate excessive driving torque, that is, the power consumption of the motor driving battery 1 is suppressed. However, the generator 3 can be driven easily. The rotational inertia force of the flywheel 11 assists the driving torque of the motor 2 and suppresses power consumption by the motor 2 of the motor driving battery 1.

  The AC / DC converter 4 is connected to the generator 3, converts AC power generated by the generator 3 into DC power, and shapes the waveform. The charger 5 supplies the DC power obtained through the AC / DC converter 4 to the electric double layer capacitor 6 and the motor driving battery 1 to charge them. The electric double layer capacitor 6 has a low internal resistance, charges the motor driving battery 1 in a short time, is excellent in pressure resistance, has a long life, and can handle 10 to 1 million charge / discharge cycles.

  The charge / discharge switch 7 has three changeover switches 7a to 7c, and can selectively supply the power output from the generator 3 to any or all of the three batteries 8a to 8c constituting the main battery 8. It is said. Further, these change-over switches 7a to 7c can supply the electric power charged in the batteries 8a to 8c to the load 12 when they are turned on. A backflow prevention diode 13 is connected between the charger 5 and the charge / discharge switcher 7. When the output power level of the generator 3 becomes unstable due to the output power level of the generator 3 being lower than the set value, the charge / discharge switcher 7 is automatically switched from off to on, and the power supply to the load 12 continues to be stable. Make it feasible.

  FIG. 2 shows a schematic configuration of a generator constituting the power generation system. The generator 3 includes a pair of rotating plates 23 that rotate together with the rotating shaft 22 in a fixed frame 21 of the generator body, a rotating cylinder 24 that is attached to the periphery of the rotating plates 23 and has a flywheel function, and the rotating cylinder. An outer ring magnet 25 and an inner ring magnet 26 fixed to an outer peripheral portion and an inner peripheral portion of 24, an outer coil 28 and an inner coil 29 fixed to the outer periphery of the laminated steel plate portion 27 inside the fixed frame 21 and the central portion of the fixed frame 21; Have

  In the power generation system having such a configuration, first, a motor driving battery 1 charged to a power level (power capacity) sufficient to start up the motor 2 at a stable rotational speed is prepared. Since the motor 2 is connected in series to the motor driving battery 1 via the motor start switch 9, the motor start switch 9 is subsequently closed. Then, a starting current flows through the motor 2 using the motor driving battery 1 as a power source. Upon receiving this starting current, a driving torque is generated in the motor 2 and is urged to rotate, and the rotational speed is gradually increased. The rotation of the motor 2 is transmitted to the generator 3 through the coupler 10, and the generator 3 increases the power level generated with its own rotation increase.

  When the rotational speeds of the motor 2 and the generator 3 reach the set rotational speed, the generator 3 generates electric power (AC power) corresponding to the rotational speed. Furthermore, when the rotational speeds of the motor 2 and the generator 3 increase beyond the set rotational speed, the rotary inertia force of the flywheel 11 connected to the output shaft acts on the generator 3 to drive the motor 2. A torque exceeding the torque acts on the output shaft of the generator 3, and the generator 3 generates a torque without depending on the driving torque of the motor 2. Accordingly, power consumption of the motor driving battery 1 by the motor 2 is suppressed. During the assist of the rotational force of the motor 2 by the rotational inertia force of the flywheel 11 of the generator 3, the electric power generated by the generator 3 is passed through the AC / DC converter 4 and the charger 5 to the electric double layer capacitor. 6 and the motor driving battery 1 are charged.

  Therefore, when the rotational speed exceeds the set value, the generator 3 stabilizes the operation of the motor 2 and the generator 3 in a state where the charging capacity of the motor driving battery 1 is stably secured. In this way, the motor 2 rotates and energizes the generator 3 using the motor drive battery 1 as a power source, and acts to return the electric power generated by the generator 3 to the motor drive battery 1. The amount equivalent to the rotational inertia force that is stored and released can contribute to the miniaturization of the generator 3.

  On the other hand, the electric power generated by the generator 3 is supplied to all or any of the load 12 and the three batteries 8a to 8c through the charger 5 and the charge / discharge switching device 7. Therefore, all or any of the batteries 8a to 8c can be stored while continuing to supply power to the load 12. When the generated power of the generator 3 is reduced or unstable, the charge / discharge switcher 7 closes all or any one of the changeover switches 7a to 7c constituting the charge / discharge switcher 7, The power supply to the load 12 can be continued from all or any of the batteries 8a to 8c.

  As described above, the power generation system according to the present embodiment uses the motor driving battery 1 as a driving power source for the motor 2, generates power in the generator 3 connected to the motor 2 via the coupler 10, and The fly hole 11 is fixed to the output shaft, and a rotational inertia force is applied to the rotor of the generator 3. The generated power of the generator 3 at this time is converted into a direct current by the AC / DC converter 4, and the direct current is converted. The DC power can be charged to the motor driving battery 1 and the electric double layer capacitor 6, and the batteries 8 a to 8 c can be charged via the changeover switches 7 a to 7 c of the charge / discharge switching device 7. In this configuration, the electric power charged in is discharged to the load 12 via the charge / discharge switching device.

  With this configuration, rotational energy (rotational inertial force) is sufficiently accumulated in the flywheel 11 fixed to the rotor of the generator 3 in a rotation region that exceeds the set drive torque of the motor 2, and rotation due to fluctuations in the load 12, etc. When the unstable state shifts, the rotational energy accumulated in the flywheel 11 is released, so that the rotation of the generator 3 can be continuously maintained in a stable state. Further, during a period in which the rotational inertia force of the flywheel 11 is sufficiently large and sufficient rotational energy can be accumulated in the flywheel 11 in the rotational speed region exceeding the set rotational speed of the generator 3, the level obtained at the set rotational speed is obtained. Since the generated power can be obtained, the generated power is used as surplus power to charge the generator driving battery 1 and the electric double layer capacitor 6 and to charge the plurality of batteries 8a to 8c on the load 12 side. Thus, stable operation of the load 12 can be realized while suppressing the use of external power as much as possible. In addition, when the power generated by the generator 3 is reduced or unstable, the power charged in the batteries 8a to 8c can be supplied to the load 12, and the load 12 can be continuously operated stably. it can.

  The power generation system of the present invention generates a rotational force associated with the rotational inertia in a region where the flywheel exceeds the set rotational speed of the small generator, and a part of the generated power of the small generator associated with the rotational inertia is used for motor driving. Recharges the battery and reduces the driving torque of the motor while having the effect of enabling stable power supply to the main battery and load, and generating large power using a small generator Useful for power generation systems.

DESCRIPTION OF SYMBOLS 1 Motor drive battery 2 Motor 3 Generator 4 AC / DC converter 5 Charger 6 Electric double layer capacitor 7 Charge / discharge switcher 7a-7c Changeover switch 8 Main battery 8a-8c Battery 9 Motor start switch 10 Coupler 11 Flywheel 12 Load 13 Backflow prevention diode

Claims (1)

A motor drive battery used as a drive power source of the motor;
A generator connected to the motor via a coupler and rotating together with the motor to generate electric power;
A flywheel fixed to the output shaft of the generator and applying a rotational inertial force to the rotor during rotation of the generator;
An AC / DC converter that converts the generated power of the generator into a direct current;
A charger for charging the motor-driven battery and the electric double layer capacitor with the electric power converted by the AC / DC converter;
A main battery connected to the charger via a charge / discharge switch, charging the DC-converted power, and allowing the charged power to be discharged to a load;
A power generation system comprising:

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