JP3243754U - power generator - Google Patents

Abstract

[Problem] To provide a power generation device that is environmentally friendly, low cost, and capable of ensuring a stable amount of power generation. SOLUTION: An electric motor 2 having a rotating shaft 2a, a generator 4 having a rotating shaft 4a and having a larger output than the output of the electric motor 2, and a speed increaser 6 connected to the rotating shaft 2a and the rotating shaft 4a. , a distributor 8 that can supply at least a part of the electric power generated by the generator 4 to the motor 2 , a first state that can supply the electric power from the AC power source 80 to the electric motor 2 , and a first state in which the electric power from the distributor 8 can be supplied to the electric motor 2 . It includes a switch 10 that can selectively switch to a second state that can be supplied to the electric motor 2, and a control unit 20 that controls the entire device, so that the electric motor 2 can be continuously driven by the electric power from the distributor 8. It operates in the first state until the value is reached, and operates in the second state when the electric power from the distributor 8 reaches a value that allows the electric motor 2 to continue driving. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to a power generation device that can be started by electric power from a power source.

Japanese Unexamined Patent Publication No. 2004-221479 (Patent Document 1) discloses that a solar cell array composed of a plurality of solar cell modules is installed on the roof of a house, and the power generated by the solar cell array is transmitted to a power transmission cable. and a solar power generation device that transmits power to a grid-connected inverter via a connection box.

The solar power generation device can reverse the power transmitted to the grid-connected inverter to the commercial power grid via the AC distribution board or supply it to household loads, thereby reducing energy demand. With the constant increase in energy consumption, it is expected to be an environmentally friendly and highly safe power generation device.

Japanese Patent Application Publication No. 2004-221479

However, solar power generation devices not only require a large amount of equipment and facility costs and maintenance costs, but also have power generation efficiency that is greatly affected by the natural environment such as the weather.

The present invention has been made in view of the above, and aims to provide a power generation device that is environmentally friendly, low cost, and capable of ensuring a stable amount of power generation.

The power generation device and solar power generation system of the present invention employ the following means to achieve the above-mentioned objective.

According to a preferred embodiment of the power generating device according to the present invention, a power generating device that can be started by electric power from a power source is configured. The power generation device includes an electric motor having a first rotating shaft, a generator having a second rotating shaft and having an output larger than the output of the electric motor, and a speed increasing generator connected to the first rotating shaft and the second rotating shaft. The motor includes a distributor, a distributor electrically connected to the motor and the generator, a switch having a first circuit and a second circuit, and a control unit. The speed increaser is capable of increasing the rotational speed of the first rotating shaft and transmitting the increased rotational speed to the second rotating shaft. The distributor is capable of supplying at least a portion of the electric power generated by the generator to the electric motor. The first circuit is capable of supplying power from the power source to the motor, and the second circuit is capable of supplying power from the distributor to the motor. The switch can selectively switch between an electrical connection between the first circuit and the electric motor and an electrical connection between the second circuit and the electric motor. The control unit controls the switching device to electrically connect the first circuit and the motor until the power from the distributor reaches a value that allows the motor to be driven continuously, and the control unit controls the switching device to electrically connect the first circuit and the motor until the power from the distributor reaches a value that allows the electric motor to continue driving. The switch is controlled to electrically connect the second circuit and the motor when the value reaches a value that allows continuous driving.

According to the present invention, until the power from the distributor reaches a value that allows the motor to be continuously driven, the power from the power source is used to drive the motor, while the power from the distributor continues to drive the motor. When the driveable value is reached, the power supplied from the power supply to the motor is cut off and the power from the distributor is used to drive the motor, thus generating electricity while reducing the amount of power used from the power supply. be able to. Thereby, an environment-friendly power generation device can be realized. The power generation device is mainly composed of an electric motor, a generator, a distributor, a switch, and a control unit, so it can be realized at low cost, and the power generation efficiency can be improved depending on weather conditions. It is not greatly influenced by the natural environment.

According to a further embodiment of the power generation device according to the present invention, the generator includes a first generator having a third rotation shaft as the second rotation shaft, and a second generator having the fourth rotation shaft as the second rotation shaft. It has a generator. The power generation device further includes a connection section and a detection section capable of detecting the states of the first and second generators. The connection portion connects and disconnects the third rotating shaft to the first rotating shaft via the speed increasing gear, and connects and disconnects the fourth rotating shaft to the first rotating shaft via the speed increasing gear. conduct. The control unit connects and disconnects the third rotation shaft to the first rotation shaft, and connects and disconnects the third rotation shaft to the first rotation shaft according to the states of the first and second generators detected by the detection unit. Controls the connection to connect and disconnect from the rotating shaft.

According to this embodiment, it is possible to generate electricity using the generator in good condition among the first generator and the second generator, so it is possible to improve the power generation efficiency.

According to a further embodiment of the power generation device according to the present invention, the detection unit is capable of detecting the temperatures of the first and second generators. The control unit controls the connection unit to disconnect the third or fourth rotation shaft from the first rotation shaft when the temperature of the first or second generator reaches a predetermined temperature or higher. At the same time, the connection portion is controlled to connect the fourth or third rotation shaft to the first rotation shaft.

According to this embodiment, the generator to be driven can be selected depending on whether the temperature state is good or bad as the state of the first generator and the second generator. Thereby, in place of a generator whose power generation efficiency has decreased due to a high temperature, it is possible to generate electricity using a generator whose power generation efficiency is good at a low temperature.

According to a further embodiment of the power generation device according to the present invention, the power generation device further includes a battery capable of storing power generated by the generator. Then, the control unit controls the switching device to electrically connect the first circuit and the electric motor when the amount of electricity stored in the battery is not enough to continuously drive the electric motor, and the control unit controls the switching device to electrically connect the first circuit and the electric motor, The switching device is controlled to electrically connect the second circuit and the electric motor when the electric power is such that the electric power can be continuously driven.

According to this embodiment, the electric power generated by the generator is stored in the battery, and the electric motor is continuously driven using the electric power stored in the battery, so that the electric power generated by the generator directly drives the electric motor. The motor can be driven more stably than a configuration that drives the motor.

According to the present invention, it is possible to provide a power generation device that is environmentally friendly, low cost, and capable of ensuring a stable amount of power generation.

1 is a configuration diagram schematically showing the configuration of a power generation device 1 according to an embodiment of the present invention. 1 is a configuration diagram showing an outline of the configuration of a switching device 10. FIG. It is a block diagram which shows the outline of the structure of the power generation apparatus 100 of a modification. It is a block diagram which shows the outline of the structure of the power generation apparatus 200 of a modification.

Next, the best mode for carrying out the present invention will be described using examples.

As shown in FIG. 1, a power generation device 1 according to an embodiment of the present invention includes an electric motor 2 having a rotating shaft 2a, a generator 4 having a rotating shaft 4a, and connecting the rotating shaft 2a and the rotating shaft 4a. A speed increaser 6, a distributor 8 connected to the generator 4 via a power line L1, and a distributor 8 connected to the electric motor 2 via a power line L2 and to the distributor 8 via a power line L3. It includes a switch 10 and a control unit 20 that controls the entire device. The rotating shafts 2a and 4a are examples of implementation configurations corresponding to a "first rotating shaft" and a "second rotating shaft" in the present invention, respectively. Further, the control unit 20 is an example of an implementation configuration corresponding to a "control unit" in the present invention.

As the electric motor 2, for example, a synchronous electric motor that rotates at a synchronous speed determined by the frequency of the AC power source 80 can be used. The rotational speed of the rotating shaft 2a is determined by the frequency and the number of poles of the AC power source 80. Further, for the generator 4, for example, a synchronous motor generator that can be driven as an electric motor and as a generator can be used. It is preferable to use a generator 4 having a larger output than the output of the electric motor 2, for example, an output 10 times the output of the electric motor 2.

As shown in FIG. 1, the speed increaser 6 includes a rotating gear 6a fixed to the rotating shaft 2a so as to be rotatable together with the rotating shaft 2a, and a rotating gear 6a fixed to the rotating shaft 4a so as to be rotatable integrally with the rotating shaft 4a. It has a subordinate gear 6b. The rotating gear 6a has a larger diameter than the dependent gear 6b. In other words, it can be said that the number of teeth of the rotating gear 6a is greater than the number of teeth of the dependent gear 6b. That is, the speed increaser 6 can increase the rotational speed of the rotating shaft 2a and transmit it to the rotating shaft 4a. The gear ratio of the speed increaser 6 can be set to 10, for example.

The distributor 8 supplies the electric power generated by the generator 4 to the power transmission line via the power line L4, and also to the electric motor 2 via the power line L3 and the switch 10.

As shown in FIG. 1, the switch 10 can be connected to an AC power source 80 via a power line L5. As shown in FIG. 2, the switching device 10 operates in a state where the power line L2 and the power line L5 are connected (hereinafter referred to as a "first state") and a state where the power line L2 and the power line L3 are connected. (hereinafter referred to as "second state"). When the first state is established by the switch SW, the electric motor 2 is driven by the power from the AC power supply 80, and when the second state is established by the switch SW, the electric motor 2 is driven by a part of the power generated by the generator 4. , the electric motor 2 is driven. In this embodiment, the switch SW is configured to establish the first state when the power generation device 1 is not in operation. The power line L5, switch SW, and power line L2 correspond to the "first circuit" in the present invention, and the power line L3, switch SW, and power line L2 correspond to the "second circuit" in the present invention. This is an example.

The control unit 20 is configured as a microprocessor centered around a CPU (not shown), and includes, in addition to the CPU, a ROM (not shown) for storing processing programs and a RAM (not shown) for temporarily storing data. , an input/output port, and a communication port (none of which are shown). For example, information regarding the driving status of the electric motor 2 and the generator 4, the amount of electric power generated by the generator 4, and the like are input to the control unit 20 via an input port. Further, the control unit 20 outputs a distribution control signal to the distributor 8, a switching control signal to the switch 10, etc. via an output port.

Next, the operation of the power generation device 1 configured in this way will be explained. In the power generation device 1, the switching device 10 is connected to the AC power source 80, so that electric power from the AC power source 80 is supplied to the electric motor 2 via the switching device 10, and the electric motor 2 is driven. By driving the electric motor 2, the generator 4 is driven via the speed increaser 6. Electric power is thereby generated.

Here, until the power generated by driving the generator 4 reaches a predetermined value, that is, the amount of power that can stably and continuously drive the electric motor 2, the control unit 20 controls the power generated by the generator 4. The distributor 8 is controlled to supply all of the generated power to the power line L4. At this time, the switch SW of the changeover device 10 is in the first state. On the other hand, when the power generated by driving the generator 4 exceeds a predetermined value, that is, the amount of power that can stably and continuously drive the electric motor 2, the control unit 20 controls the amount of power generated by the generator 4. The distributor 8 is controlled to supply the power that can stably and continuously drive the electric motor 2 to the power line L3, and the remaining power is supplied to the power line L4. The switching device 10 is controlled to supply the electric power supplied to the electric motor 2 to the electric motor 2. That is, the switch SW of the changeover device 10 is in the second state.

In this way, when the electric power generated by the generator 4 exceeds the amount of electric power that can stably and continuously drive the electric motor 2, the electric motor 2 generates electricity instead of the electric power from the AC power supply 80. Since it is driven by the electric power generated by the machine 4, it is possible to realize environmentally friendly power generation. Note that the power generation device 1 is mainly composed of an electric motor 2, a generator 4, a distributor 8, a switch 10, and a control unit 20, so it does not operate like a conventional solar power generation device. Since it does not require a large amount of equipment or facilities, costs can be reduced, and power generation efficiency is not greatly affected by the natural environment such as weather.

In this embodiment, one generator 4 is used, but the configuration is not limited to this. For example, as shown in a modified example of a power generation device 100 illustrated in FIG. 3, a configuration may be adopted in which two power generators 104 and 105 are used. The power generation device 100 of the modified example has the following features: the generator 4 is replaced with generators 104 and 105, and a clutch 140 that can connect and disconnect either of the generators 104 or 105 to the speed increaser 6 is newly added. The power generation device 1 has the same hardware configuration as the power generation device 1 of the embodiment described using FIG. 1, except that the control unit 20 is replaced with a control unit 120. Therefore, in the power generation device 100 of the modified example, the same parts as in the configuration of the power generation device 1 of the embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

The generators 104 and 105 basically have the same hardware configuration as the generator 4 included in the power generation device 1 of the embodiment, and are, for example, synchronous generators that can be driven as both electric motors and generators. A motor generator can be used. Furthermore, it is preferable to use generators 104 and 105 that have a larger output than the output of the electric motor 2, for example, an output that is 10 times the output of the electric motor 2. The generators 104 and 105 have rotating shafts 104a and 105a, as shown in FIG. 3. The rotating shafts 104a, 105a have spline threads 104b, 105b at their tips. Generators 104 and 105 are electrically connected to distributor 8 via power lines L1a and L1b. The generators 104 and 105 correspond to a "first generator" and a "second generator" in the present invention, respectively, and the rotating shafts 104a and 105a correspond to a "third rotating shaft" and a "fourth rotating shaft" in the present invention, respectively. This is an example of an implementation configuration corresponding to the "axis".

As shown in FIG. 3, the clutch 140 includes a pair of clutch gears 141, 142 that are integrated with the subordinate gear 6b, and a pair of couplings 143, 144. Clutch gears 141 and 142 are arranged concentrically with subordinate gear 6b. The couplings 143, 144 have a substantially cylindrical shape, and have spline threads (not shown) on their inner peripheral surfaces that can be engaged with the spline threads 104b, 105b and the clutch gears 141, 142. Couplings 143, 144 are arranged coaxially with rotating shafts 104a, 105a and dependent gear 6b. By moving the couplings 143, 144 in the axial direction toward the subordinate gear 6b, the couplings 143, 144 are engaged with both the spline threads 104b, 105b and the clutch gears 141, 142, so that the rotating shaft 104a, 105a and dependent gear 6b are connected. That is, the connected state is such that the rotation of the dependent gear 6b can be transmitted to the rotating shafts 104a and 105a. On the other hand, by moving the couplings 143, 144 in the axial direction to the side opposite to the subordinate gear 6b side, the engagement between the couplings 143, 144 and the clutch gears 141, 142 is released, so that the rotating shaft 104a , 105a and the dependent gear 6b are disconnected. That is, a disconnected state occurs in which the rotation of the dependent gear 6b is not transmitted to the rotating shafts 104a and 105a. Note that as the clutch 140, a dog clutch, a synchronizer mechanism, a friction clutch, an electromagnetic clutch, or the like may be used. Clutch 140 is an example of an implementation configuration corresponding to a "connection section" in the present invention.

The control unit 120 is configured as a microprocessor centered on a CPU (not shown), and includes a ROM (not shown) that stores processing programs and a RAM (not shown) that temporarily stores data. , an input/output port, and a communication port (none of which are shown). The control unit 120 receives, for example, information regarding the driving status of the electric motor 2 and the generator 4, the amount of electric power generated by the generator 4, and the temperatures of the generators 104 and 105 from temperature sensors 104c and 105c through input ports. It is entered through. Further, the control unit 120 outputs a distribution control signal to the distributor 8, a switching control signal to the switch 10, a switching signal to the clutch 140, and the like through an output port. The control unit 120 corresponds to a "control section" in the present invention, and the temperature sensors 104c and 105c are examples of an implementation configuration corresponding to a "detection section" in the present invention.

The operation of the modified power generation device 100 configured in this manner will be described. In the power generation device 100, the switching device 10 is connected to the AC power source 80, so that electric power from the AC power source 80 is supplied to the electric motor 2 via the switching device 10, and the electric motor 2 is driven. By driving the electric motor 2, the generator 104 and/or the generator 105 are driven via the speed increaser 6. Electric power is thereby generated.

Here, the control unit 120 controls the rotating shafts 104a, 105a of the generators 104, 105 whose temperature is lower than the predetermined temperature from the temperature sensors 104c, 105c to be connected to the subordinate gear 6b. The clutch 140 is driven and controlled. When the power generator 100 is operated for the first time, the temperatures of the generators 104 and 105 are both lower than the predetermined temperature, so in this modification, the rotating shaft 104a of the generator 104 is connected to the dependent gear 6b. The configuration is such that the clutch 140 is drive-controlled.

The control unit 120 controls the power generated by the generator 4 until the power generated by driving the generator 104 reaches a predetermined value, that is, the amount of power that can stably and continuously drive the electric motor 2. The distributor 8 is controlled so as to supply all of the power to the power line L4. At this time, the switch SW of the changeover device 10 is in the first state. On the other hand, when the power generated by driving the generator 4 exceeds a predetermined value, that is, the amount of power that can stably and continuously drive the electric motor 2, the control unit 120 controls the amount of power generated by the generator 4. The distributor 8 is controlled to supply the power that can stably and continuously drive the electric motor 2 to the power line L3, and the remaining power is supplied to the power line L4. The switching device 10 is controlled to supply the electric power supplied to the electric motor 2 to the electric motor 2. That is, the switch SW of the changeover device 10 is in the second state.

On the other hand, when the temperature of the generator 104 reaches a predetermined temperature or higher due to continued driving of the generator 104, the control unit 120 releases the connection between the rotating shaft 104a of the generator 104 and the dependent gear 6b. At the same time, the clutch 140 is drive-controlled so that the rotating shaft 105a of the generator 105 is connected to the subordinate gear 6b. As a result, the generator 105 continues to generate an amount of power that can stably and continuously drive the electric motor 2.

In this way, when the electric power generated by the generator 104 exceeds the amount of electric power that can stably and continuously drive the electric motor 2, the electric motor 2 generates electricity instead of the electric power from the AC power supply 80. Since it is driven by the electric power generated by the machine 104, it is possible to realize environmentally friendly power generation. Moreover, since power is generated using the generators 104 and 105 whose temperature is lower than the predetermined temperature, it is possible to generate power efficiently. Note that the power generation device 100 mainly includes an electric motor 2, generators 104 and 105, a clutch 140, a distributor 8, a switch 10, and a control unit 120. Unlike power generation equipment, it does not require large costs for equipment and facilities, so costs can be reduced, and power generation efficiency is not greatly affected by the natural environment such as weather.

In this embodiment, when the power generated by the generator 4 exceeds the amount of power that can stably and continuously drive the electric motor 2, the power from the generator 4 is transferred to the distributor 8 and the switch 10. Although the configuration is such that the power is directly supplied to the electric motor 2 via the power supply, the present invention is not limited to this. For example, as shown in a power generation device 200 of a modified example illustrated in FIG. When the storage capacity of the battery 250 exceeds the amount of power that can stably and continuously drive the electric motor 2, the electric power may be directly supplied to the electric motor 2 via the switch 10. Here, the battery 250 is electrically connected to the distributor 8 via a power line L3a, and is electrically connected to the switch 10 via a power line L3b. Note that the control unit 20 determines whether the storage capacity of the battery 250 exceeds the amount of power that can stably and continuously drive the electric motor 2 by checking the voltage sensor 252 installed between the terminals of the battery 250. The calculation may be performed using the inter-terminal voltage from the battery 250 and the current from the current sensor 254 attached to the power line connected to the output terminal of the battery 250.

The power generation device 200 of the modified example can also achieve the same effects as the power generation device 1 of the embodiment, that is, it is possible to achieve environmentally friendly power generation, reduce costs, and increase power generation efficiency. It is possible to achieve the effect of not being greatly influenced by the natural environment such as the weather. Note that in this modification, the electric power generated by the generator 4 is temporarily stored in the battery 250, and the electric motor 2 is driven using the electric power stored in the battery 250, so that the electric motor 2 can be stably driven. be able to.

This embodiment shows an example of a form for implementing the present invention. Therefore, the present invention is not limited to the configuration of this embodiment.

1 Power generation device (power generation device)
2 Electric motor (electric motor)
2a Rotation axis (first rotation axis)
4 Generator (generator)
4a Rotating axis (second rotating axis)
6 Speed increaser (speed increaser)
6a Rotating gear 6b Subordinate gear 8 Distributor (distributor)
10 Switching device (switching device)
20 Control unit (control section)
80 AC power supply 100 Power generation device (power generation device)
104 Generator (first generator)
104a Rotation axis (third rotation axis)
104b Spline strip 104c Temperature sensor (detection section)
105 Generator (second generator)
105a Rotating shaft (second rotating shaft)
105b Spline strip 105c Temperature sensor (detection section)
140 Clutch (connection part)
141 Clutch gear 142 Clutch gear 143 Coupling 144 Coupling 200 Power generator (power generator)
250 battery (battery)
252 Voltage sensor 254 Current sensor L1 Power line L2 Power line L3 Power line L4 Power line L5 Power line L1a Power line L1b Power line SW Switch

Claims (4)

A power generation device that can be started by electricity from a power source,
an electric motor having a first rotating shaft;
a generator having a second rotating shaft and having an output greater than the output of the electric motor;
a speed increaser connected to the first rotation shaft and the second rotation shaft so as to be able to increase the rotation speed of the first rotation shaft and transmit the increased rotation speed to the second rotation shaft;
a distributor electrically connected to the electric motor and the generator so as to be able to supply at least a portion of the electric power generated by the generator to the electric motor;
a first circuit capable of supplying power from the power source to the electric motor; and a second circuit capable of supplying electric power from the distributor to the electric motor; a switch capable of selectively switching between a connection between the second circuit and the electric motor, and an electrical connection between the second circuit and the motor;
The switch is controlled to electrically connect the first circuit and the motor until the power from the distributor reaches a value that allows the electric motor to be driven continuously, and the switch is controlled so that the first circuit and the motor are electrically connected. a control unit that controls the switching device to electrically connect the second circuit and the electric motor when a value that allows the electric motor to be continuously driven is reached;
A power generation device equipped with. The generator includes a first generator having a third rotating shaft as the second rotating shaft, and a second generator having a fourth rotating shaft as the second rotating shaft,
Connection and disconnection of the third rotation shaft to the first rotation shaft via the speed increaser, and connection and connection of the fourth rotation shaft to the first rotation shaft via the speed increaser. A connection part for releasing,
a detection unit capable of detecting states of the first and second generators;
Furthermore,
The control unit connects and disconnects the third rotation shaft to the first rotation shaft and controls the fourth rotation according to states of the first and second generators detected by the detection unit. The power generation device according to claim 1, wherein the connection section is controlled to connect and disconnect a shaft from the first rotating shaft. The detection unit is capable of detecting temperatures of the first and second generators,
The control unit controls the connection unit to disconnect the third or fourth rotation shaft from the first rotation shaft when the temperature of the first or second generator reaches a predetermined temperature or higher. The power generating device according to claim 2, wherein the connection unit is controlled to connect the fourth or third rotation shaft to the first rotation shaft. further comprising a battery capable of storing power generated by the generator,
The control unit controls the switching device to electrically connect the first circuit and the motor when the amount of power stored in the battery is not enough to continuously drive the electric motor, and the controller controls the switching device to electrically connect the first circuit and the motor, The switching device is controlled to electrically connect the second circuit and the electric motor when the amount of electric power is sufficient to continuously drive the electric motor. Power generation equipment.

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