Power generation system

Abstract

To reduce power consumption in a motor and a generator and prolong the operation time of the whole system.SOLUTION: Two sets of power generation systems 100-1, 100-2 are configured such that engines 1-1, 1-2 are fixed on one end side of rotation shafts 3-1, 3-2 and generators 2-1, 2-2 are fixed on the other end side of the rotation shafts 3-1, 3-2. By providing a circuit configuration such that a power generation output of a first generator 2-1 included in a first power generation system 100-1 is used for charging batteries 10-1, 10-2, lengths of the rotation shafts 3-1, 3-2 are made shorter than those of a conventional power generation system having two generators at both end portions of a rotation shaft that penetrates through an engine, and magnetoelectric resistance generated so as to prevent rotation of rotors in the generators 2-1, 2-2 becomes equivalent to that of a single generator. In addition, it is possible to extend operation time of the entire system by effectively utilizing a power storage amount of the batteries 10-1, 10-2 charged using the power generation output of the first generator 2-1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power generation system, and is particularly suitable for use in a power generation system having a motor powered by a storage battery and a generator connected to the motor via an output shaft. [Background technology]

[0002] Conventionally, there has been known a power generation system that has a motor powered by a storage battery and two generators that generate electricity and are connected to both ends of an output shaft that passes through the motor (see, for example, Patent Documents 1 to 3). The power generation system described in Patent Document 1 is configured so that couplings are provided on both sides of the same shaft of the motor and multiple generators generate electricity.

[0003] The power generation system described in Patent Document 2 aims to reduce the power consumption of the engine and generators, and to extend the operating time of the entire system by effectively utilizing the stored electricity in the storage batteries. In order to do this, a planetary gear mechanism for speed change is interposed between the rotor and stator in the engine and each generator, and the deceleration action of the planetary gear mechanisms in three locations makes it possible to smoothly continue rotating the common output shaft of the engine and each generator.

[0004] In the power generation system described in Patent Document 3, the power generation rotor of each generator is provided with a rotation assist rotor fixed to the output shaft so as to rotate integrally with the power generation rotor, and a rotation assist stator fixedly positioned inside the rotation assist rotor, with the aim of reducing the power consumption of the motor and generator and extending the operating time of the entire system by effectively utilizing the stored electricity in the storage battery. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3193838 [Patent Document 2] Japanese Patent Application Laid-Open No. 202273811 [Patent Document 3] Japanese Patent Publication No. 2021a37323 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to reduce the power consumption of the engine and generator and extend the operating time of the entire system by means different from those of Patent Documents 2 and 3. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the power generation system of the present invention comprises a motor powered by a storage battery, and a generator connected to the motor via a rotating shaft to generate electricity, with the motor's drive rotor fixed to one end of the rotating shaft and the generator's power-generating rotor fixed to the other end of the rotating shaft, and has a circuit configuration in which the system comprises multiple sets of motors and generators connected to the rotating shaft, and the power generation output of the generators in some of the sets is used to charge the storage battery. [Effects of the Invention]

[0008] In contrast to conventional power generation systems that have two generators at both ends of a rotating shaft that penetrates a motor, the present invention configured as described above has a configuration in which only one generator is connected to the motor via the rotating shaft, which allows the length of the rotating shaft to be shortened and the electromagnetic resistance generated in the generator to prevent the rotor from rotating can be reduced to that of a single generator.This reduces the power consumption of the motor and generator.Furthermore, according to the present invention, the amount of electricity stored in the storage battery, which is charged using the generated power output, can be effectively used, thereby extending the operating time of the entire system. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating an example of the configuration of a power generation system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating a simplified configuration example of an engine. [Figure 3] FIG. 1 is a diagram illustrating a simplified configuration example of a generator. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a diagram showing an example of the configuration of a power generation system according to this embodiment.

[0011] As shown in FIG. 1, the power generation system of this embodiment includes a storage battery 10 -1 ,10 -2 Engine 1 powered by -1 ,1 -2 and the engine 1 -1 ,1 -2 Rotation axis 3 for each -1 ,3 -2 Generator 2 that generates electricity through a -1 ,2 -2 In the following description, engine 1 -1 , Generator 2 -1 and rotation axis 3 -1 One set consisting of these is referred to as the first power generation system 100 -1 That is, Engine 1 -2 , Generator 2 -2 and rotation axis 3 -2 The other set is referred to as the second power generation system 100. -2 That's what they say.

[0012] The power generation system shown in FIG. -1 ,10 -2 By Movers 1 -1 ,1 -2 The rotor (not shown in FIG. 1) is rotated by driving the rotor, and the rotating shaft 3 fixed to the rotor is rotated. -1 ,3 -2 Through generator 2 -1 ,2 -2 The rotor (not shown in FIG. 1) is rotated to generate electricity. -1 ,3 -2On one end of the engine 1 -1 ,1 -2 The driving rotor is fixed, and the rotating shaft 3 -1 ,3 -2 On the other end of the generator 2 -1 ,2 -2 The power generating rotor is fixed.

[0013] Engine 1 -1 ,1 -2 is driven by, for example, 100V AC, and rotates the drive rotor. -1 ,2 -2 The generator generates single-phase, two-phase, or three-phase AC voltage (100 to 240V AC) through the rotation of the rotor. -1 ,10 -2 is a secondary battery that can be used repeatedly by storing electricity through charging. Any type of secondary battery can be used, but one example is a lithium iron phosphate battery. Lithium iron phosphate batteries have the advantages of a lower self-discharge rate and a longer lifespan than lead batteries.

[0014] The power generation system of this embodiment further includes an AC-DC inverter 4, a DC-AC inverter 5, a charge / discharge switching unit 6, a controller 7, a transformer 8, and an output terminal 9. The AC-DC inverter 4 is a first power generation system 100. -1 The first generator 2 -1 Converts AC voltage generated by the battery 10 into DC voltage. -1 ,10 -2 The battery 10 is charged and discharged based on the DC voltage converted by the AC-DC inverter 4. -1 ,10 -2 The DC voltage generated by the discharge from the

[0015] The charge / discharge switching unit 6 is connected to the battery 10 -1 ,10 -2 The charge / discharge switching unit 6 is configured to switch between charging and discharging of the two batteries 10 and is configured to include a switching circuit, a sensor, and a control unit.-1 ,10 -2 Of these, engine 1 -1 ,1 -2 a battery that discharges to drive the first generator 2 -1 The system alternates between charging the battery using the power generated from the power plant and charging the battery using the power generated from the power plant.

[0016] For example, the charge / discharge switching unit 6 -1 ,1 -2 At the initial stage of the first battery 10 -1 For charging a second battery 10 -2 The charge / discharge switching unit 6 switches the second battery 10 for discharging. -2 When it is detected that the remaining amount of the first battery 10 falls below a threshold, -1 For discharging, use the second battery 10 -2 After that, the charge / discharge switching unit 6 switches the first battery 10 for discharging. -1 When it is detected that the remaining amount of the first battery 10 falls below a threshold, -1 For charging a second battery 10 -2 This switching operation is then repeated.

[0017] By configuring it in this way, the battery 10 -1 ,10 -2 The AC voltage converted by the DC-AC inverter 5 based on the DC voltage discharged from either of the -1 ,1 -2 The first generator 2 can be constantly applied to the -1 The AC voltage generated from the battery 10 is converted into DC voltage by the AC-DC inverter 4. -1 ,10 -2 It is possible to charge the battery at any time.

[0018] Controller 7 is the engine 1 -1 ,1 -2The controller 7 controls the application of DC voltage to the motor 1, and is configured by, for example, a microcomputer. -1 ,1 -2 The rotation speed of the drive rotor is controlled by controlling the DC voltage applied to the drive rotor 6. Note that the operation of the charge / discharge switching unit 6 and the operation of the controller 7 may be performed by a single microcomputer.

[0019] The transformer 8 is connected to the second power generation system 100 -2 The second generator 2 -2 The transformer 8 converts the AC voltage generated by the transformer 8 into a standard AC voltage and outputs it to the output terminal 9. For example, the transformer 8 generates 100V AC, which is the standard voltage for Japanese household use. In this case, various loads that operate using 100V AC can be connected to the output terminal 9.

[0020] In addition, an AC-DC inverter is provided in place of the transformer 8, and the second generator 2 -2 The AC voltage generated by the inverter may be converted to a DC voltage and output to the output terminal 9. For example, the AC-DC inverter generates a DC voltage that is the standard operating voltage of a battery. In this case, the DC voltage may be, for example, the standard operating voltage of an in-vehicle battery, 12 to 14 V; the standard operating voltage of a USB memory, 5 V, 9 V, 15 V, or 20 V; or the standard operating voltage of a lead-acid battery, 14 to 15 V. It may be possible to selectively switch which DC voltage is output.

[0021] Figure 2 shows engine 1 -1 ,1 -2 As shown in FIG. 2, engine 1 -1 ,1 -2 is the rotation axis 3 -1 ,3 -2 The rotating shaft 3 is fixed to the -1 ,3 -2The rotor 11 is a cylindrical drive rotor with a bottom that rotates together with the rotor shaft 3, and a disk-shaped drive stator 12 is provided inside the drive rotor 11 so as to be fixed and not rotate integrally with the drive rotor 11. -1 ,3 -2 is provided at the axial center of the drive rotor 11 and the drive stator 12 and is fixed to the drive rotor 11.

[0022] A coil 12a is wound around the outer periphery of the drive stator 12. A permanent magnet 11a is fixed to the inner periphery of the drive rotor 11, which is positioned outside the coil 12a, so as to face the coil 12a. When current is applied to the coil 12a, the drive rotor 11 is rotated by electromagnetic induction with the permanent magnet 11a. As a result, the rotating shaft 3 to which the drive rotor 11 is fixed -1 ,3 -2 The rotation also rotates, and the generator 2 -1 ,2 -2 is transmitted to.

[0023] In Figure 2, engine 1 -1 ,1 -2 Only the main components are shown, and other components are optional.

[0024] Figure 3 shows generator 2 -1 ,2 -2 As shown in FIG. 3, the generator 2 -1 ,2 -2 is the rotation axis 3 -1 ,3 -2 The rotating shaft 3 is fixed to the -1 ,3 -2 The rotor 21 is a cylindrical rotor with a bottom that rotates together with the rotor shaft 3, and the stator 22 is a disk-shaped rotor that is fixed to the rotor 21 and does not rotate integrally with the rotor 21. -1 ,3 -2 is provided at the axial center of the power generation rotor 21 and the power generation stator 22, and is fixed to the power generation rotor 21 while being arranged so as to be rotatable relative to the power generation stator 22.

[0025] A coil 22a is wound around the outer periphery of the power-generating stator 22. A permanent magnet 21a is fixed to the inner periphery of the power-generating rotor 21, which is positioned outside the coil 22a, so as to face the coil 22a. -1 ,3 -2 When the power generating rotor 21 rotates in accordance with the rotation of the first generator 2, an electromotive force is generated in the coil 22a due to electromagnetic induction between the permanent magnet 21a, which rotates together with the power generating rotor 21, and the coil 22a. -1 The AC voltage generated by the second generator 2 is supplied to the AC-DC inverter 4. -2 The AC voltages generated by the inverters are supplied to the transformers 8, respectively.

[0026] In addition, in Figure 3, generator 2 -1 ,2 -2 Only the main components are shown, and other components are optional.

[0027] As described above in detail, the power generation system of this embodiment has a rotating shaft 3 -1 ,3 -2 On one end of the engine 1 -1 ,1 -2 The driving rotor 11 is fixed, and the rotating shaft 3 -1 ,3 -2 On the other end of the generator 2 -1 ,2 -2 Two sets of power generating systems 100 are formed by fixing the power generating rotors 21. -1 ,100 -2 The first power generation system 100 -1 The first generator 2 -1 of power output to the battery 10 -1 ,10 -2 The circuit configuration is designed to be used for charging the battery.

[0028] According to this embodiment configured as above, compared to a conventional power generation system having two generators at both ends of a rotating shaft that penetrates a motor, -1 ,3 -2 The length of the generator can be shortened. -1 ,2 -2In this case, the electromagnetic resistance that is generated to prevent the rotation of the power generating rotor 21 can be reduced to the amount of one generator. -1 ,1 -2 and Generator 2 -1 ,2 -2 This makes it possible to reduce power consumption in the

[0029] Furthermore, in this embodiment, the first power generation system 100 -1 The first generator 2 -1 of power output to the battery 10 -1 ,10 -2 Since it is used to charge the battery 10 that is charged using the power generation output -1 ,10 -2 In particular, in this embodiment, the first power generation system 100 -1 Battery 10 -1 ,10 -2 The second power generation system 100 is provided as a dedicated configuration for charging the -2 Since the load and battery are connected to the -1 ,10 -2 This allows for efficient charging of the battery.

[0030] In this embodiment, two batteries 10 -1 ,10 -2 Equipped with a motor 1 -1 ,1 -2 a battery that discharges to drive the first generator 2 -1 The charge / discharge switching unit 6 alternately switches between the battery 10 and the battery that is charged by the power generation output from the battery 10. -1 ,10 -2 Based on the discharge voltage from engine 1 -1 ,1 -2 The first generator 2 can be driven at all times. -1 Based on the generated voltage from the battery 10 -1 ,10 -2 This allows the first generator 2 to be charged at all times. -1 10 ...-1 ,10 -2 Charging the Mover 1 -1 ,1 -2 It can be powered by a battery 10 -1 ,10 -2 By effectively utilizing the stored power, it is possible to extend the operating time of the entire system.

[0031] In the above embodiment, two batteries 10 -1 ,10 -2 However, three or more batteries may be provided and charging and discharging of these batteries may be switched.

[0032] In the above embodiment, the two power generation systems 100 -1 ,100 -2 However, an example in which three or more power generation systems are provided and some of the power generation systems are connected to the battery 10 -1 ,10 -2 Alternatively, the battery may be configured to be exclusively used for charging the battery.

[0033] Furthermore, the above-described embodiments are merely examples of specific embodiments for carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereby. In other words, the present invention can be carried out in various forms without departing from the gist or main characteristics thereof. [Explanation of symbols]

[0034] 1 -1 ,1 -2 engine 2 -1 ,2 -2 generator 3 -1 ,3 -2 Rotation axis 4 AC-DC inverters 5 DC-AC inverter 6. Charge / discharge switching unit 7 Controller 8. Transformer 9 Output terminal 10 -1 ,10-2 Battery (storage battery) 11 Drive rotor 11a permanent magnet 12 Drive stator 12a coil 21 Power generating rotor 21a Permanent magnet 22 Power generating stator 22a coil 100 -1 ,100 -2 power generation system

Claims

1. A motor powered by a storage battery; a generator connected to the engine via a rotary shaft to generate electricity, a driving rotor of the motor is fixed to one end of the rotary shaft, and a power-generating rotor of the generator is fixed to the other end of the rotary shaft, The electric vehicle has a circuit configuration in which a plurality of sets of the motor and the generator connected to the rotating shaft are provided, and the power output of the generators provided in some of the sets is used to charge the storage battery. A power generation system characterized by:

2. 2. The power generation system according to claim 1, wherein the partial set is provided as a dedicated configuration for charging the storage battery.

3. 3. The power generation system according to claim 1, further comprising a plurality of the storage batteries, wherein one of the plurality of storage batteries is switched to discharge for driving the engine, and another of the plurality of storage batteries is switched to charge using the power generation output.

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