JPH11168852A - Dynamoelectric machine with incorporated flywheel, load drive device using the dynamoelectric machine and its operation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a dynamoelectric machine with an incorporated flywheel which can recover a rotation energy, at the time of the deceleration of a load to improve an energy efficiency and can operate stably, even if the load fluctuates. SOLUTION: A first stator 2 has a first armature coil 3, which is mainly in charge of transformation of an external energy. A first rotor 4 is provided so as to face the first stator 2 with a gap therebetween. In addition, a second stator 10 which has a second armature coil 11 is provided so as to face opposite the first rotor 4 with another gap therebetween. Further, a flywheel 12 is supported by the rotary shaft 5 of the first rotor 4. A second rotor 14 is formed integrally on the flywheel 12, so as to face the first rotor 4 with more another gap therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel-incorporated rotary electric machine capable of regenerating rotational energy during load deceleration and capable of operating stably with respect to load fluctuations, a load driving apparatus using the same, and a method of operating the same. About.

[0002]

2. Description of the Related Art Conventionally, for example, a hybrid drive device shown in FIG. 10 has been known as a hybrid drive device for rotationally driving an electric vehicle propulsion wheel with a load. That is, one end of a rotating shaft 104 of a rotating electric machine 103 is connected to an output shaft 102 of a prime mover 101 such as a gasoline engine. The rotor 105 of the rotating electric machine 103 includes a rotating core 106 formed by stacking silicon steel plates and a rotor coil 107. The stator 108 of the rotating electric machine 103
Is composed of a stator core 109 and a stator coil 110 in which silicon steel plates are arranged so as to surround the outer periphery of the rotating core 106 and a stator coil 110. Rotary shaft 1 of rotor 105
A wheel for vehicle propulsion is connected as a load to the opposite end of 04 (hereinafter, the engine and the wheel will be described together as an external machine). Then, as shown in FIG.
03 is electrically connected to the inverter 111, and the
Are electrically connected to a battery 112 as a power supply.

In such a conventional hybrid drive device, when the engine / wheel 101 starts and accelerates, the electric energy of the battery 112 is supplied to the rotating electric machine 103 via the inverter 111 and converted into rotational kinetic energy to convert the engine / load. 101 is driven to rotate, and conversely, engine / wheel 1
In the case of power generation and deceleration (braking) by the electric motor 01, the rotational energy of the engine / wheel 101 is converted into electric energy by the rotary electric machine 3,
And thus the efficiency of energy consumption is improved.

[0004]

However, in such a conventional hybrid drive device, there is a problem that the life of the battery is greatly reduced due to repeated charging and discharging of a large current.

The present invention has been made in view of such a conventional problem, and recovers rotational energy during load deceleration.
An object of the present invention is to provide a flywheel-incorporated rotary electric machine that can improve energy efficiency and can operate stably with respect to load fluctuation, a load driving device using the same, and a method of operating the same.

[0006]

According to a first aspect of the present invention, there is provided a flywheel-incorporated rotary electric machine having a first stator having a first armature coil for mainly performing energy conversion with the outside;
A first rotor disposed to face the first stator via a gap, and a second armature coil, the first stator being opposed to the first rotor via another gap. , A flywheel supported so as to be able to rotate independently of the rotation axis of the first rotor, and a second rotor opposed to the first rotor via a further air gap. And a second rotor coupled to the flywheel at a position where

According to a second aspect of the present invention, there is provided a flywheel-incorporated rotary electric machine having a first stator having a first armature coil for mainly performing energy conversion with the outside, and a gap inside the first stator. A first rotor disposed opposite to the first rotor and supported by a rotating shaft; and a second armature coil disposed opposite to one side of the first rotor via a gap. A second stator, a second rotor disposed to face the other side of the first rotor via a gap, and supported by the rotation shaft, and coupled to the second rotor. Flywheel.

In the rotary electric machine with a built-in flywheel according to the first and second aspects of the present invention, when electric energy is supplied to the first stator from the outside, the first rotor disposed so as to be opposed to the first stator via a gap is provided. Rotate. The rotating shaft that supports the first rotor is coupled to an external load and exchanges energy with the load.

Therefore, when deceleration is started while the first rotor is rotating at a certain speed, the second stator disposed so as to be opposed to the first rotor via a gap is excited. , Thereby inducing a current in the first rotor.
Since the first rotor rotates together with the magnetic field generated by the induced current, an induced current is also generated in the second rotor having a different relative speed to generate a driving torque, and the second rotor rotates. As a result, the flywheel coupled to the second rotor also rotates. As a result, the first rotor decelerates, and the rotational energy of the first rotor when decelerated is converted into rotational energy of the flywheel.

On the other hand, during acceleration, an induced current is generated in the first rotor by exciting the second stator, and an induced current is also generated in the second rotor. A torque is generated by the induced current and the magnetic field of the first rotor induced by the second stator. The flywheel is decelerated by the action / reaction, and the first rotor is accelerated. That is, the rotational energy of the flywheel is converted to the rotational energy of the first rotor.

[0011] Furthermore, the rotating electric machine usually becomes unstable when the load suddenly changes or the load is overloaded, because the electric equipment system has insufficient electric energy margin and the rotational speed fluctuates. In the rotary electric machine with a built-in flywheel according to the first aspect of the invention, since kinetic energy is stored in the flywheel, energy for load fluctuation can be absorbed and supplied, and stable rotation operation can be performed.

According to a third aspect of the present invention, there is provided a flywheel-installed rotary electric machine having a first stator having a first armature coil for mainly performing energy conversion with the outside, and a gap inside the first stator. A first rotor disposed opposite to the first rotor and supported by a rotating shaft; and a second armature coil disposed opposite to one side of the first rotor via a gap. A second stator, and a second rotor disposed at a position inside the second stator so as to face the one side of the first rotor via a gap,
A flywheel mounted on the rotating shaft and coupled to the second rotor.

According to a fourth aspect of the present invention, there is provided a rotary electric machine with a built-in flywheel, wherein a first stator having a first armature coil for mainly performing energy conversion with the outside, and a gap beside the first stator. A first rotor, which is arranged to face the first rotor and is supported by the rotating shaft, and a second armature coil, which is arranged to face the outer periphery of the first rotor via a gap. A second stator having a second stator disposed inside the outer circumference of the first rotor and facing the first rotor via a circumferential gap. , And a flywheel supported on the rotating shaft and coupled to the second rotor.

The rotary electric machine with a built-in flywheel according to the third and fourth aspects of the present invention operates similarly to the rotary electric machine with a built-in flywheel according to the first and second aspects, except that the second stator and the second rotor are separated from each other. Since they are arranged on the same plane, the length in the rotation axis direction can be reduced.

According to a fifth aspect of the present invention, there is provided a rotary electric machine with a built-in flywheel, wherein a first stator having a first armature coil for mainly performing energy conversion with the outside, and a gap beside the first stator. A first rotor, which is arranged to face the first rotor and is supported by the rotating shaft, and a second armature coil, which is arranged to face the outer periphery of the first rotor via a gap. A second stator having a second rotor disposed so as to face the outer periphery of the first rotor via a gap adjacent to a gap with the second stator; A flywheel mounted on the rotating shaft and coupled to the second rotor.

The rotary electric machine with a built-in flywheel according to a fifth aspect of the present invention performs a rotating operation similarly to the rotary electric machines with a built-in flywheel according to the first and second aspects.

According to a sixth aspect of the present invention, in the flywheel rotating electric machine according to any of the first to fifth aspects, a surface of the first rotor facing the second stator and a surface facing the second rotor. And a conductor disposed on a surface of the second rotor facing the first rotor.
An induced current can flow through the conductor.

According to a seventh aspect of the present invention, in the flywheel rotating electric machine incorporating the first to sixth aspects, a permanent magnet is arranged on a surface of the first rotor facing the first stator. No field current is required, the structure of the field is simplified, and the degree of freedom in arranging the conductor of the first rotor is increased.

According to an eighth aspect of the present invention, in the rotary electric machine with a built-in flywheel according to any one of the first to seventh aspects, a surface of the first rotor facing the first stator has magnetic irregularities. In addition, since the structure has only magnetic irregularities, the structure of the first rotor is simplified, and the degree of freedom in arranging the conductors of the first rotor is increased.

According to a ninth aspect of the present invention, in the rotary electric machine with a built-in flywheel according to any of the first to eighth aspects, the second rotor and the flywheel are structurally integrated, so that miniaturization is possible. is there.

According to a tenth aspect of the present invention, in the flywheel rotating electric machine of the first to ninth aspects, the number of poles of a magnetic field formed by a conductor on a surface of the first rotor facing the second stator The number of poles of the magnetic field generated by the conductor on the surface facing the second rotor is different from that of the second rotor.
The rotational speed of the rotating magnetic field generated by the stator and the rotating speed of the rotating magnetic field on the second rotor can be changed. For example, the speed of the second rotor is reduced by a fraction of the speed of the first rotor. Or, conversely, it is possible to make it several times.

According to an eleventh aspect of the present invention, in the rotary electric machine incorporating the flywheel according to any of the first to tenth aspects, the flywheel is provided with a mechanism for varying the inertial mass of the flywheel.

According to a twelfth aspect of the present invention, in the flywheel rotating electric machine with the built-in flywheel according to the eleventh aspect, a variable mechanism of the inertial mass of the flywheel is provided on the flywheel with a plurality of weights arranged in the same direction about a rotation axis, The plurality of weights are supported so as to be movable in the radial direction.

According to a thirteenth aspect of the present invention, in the rotary electric machine with the flywheel incorporated therein according to the twelfth aspect, the variable mechanism of the inertial mass of the flywheel is configured to apply a force to each of the plurality of weights against the radial movement of the flywheel. The spring is connected to the flywheel by a spring so as to operate.

In the rotary electric machine with a built-in flywheel according to the present invention, the centrifugal force is small at the time of starting.
Each of the multiple weights is located closest to the center, and as the speed increases, the centrifugal force increases, and each of the multiple weights moves to the outer position until it balances the centrifugal force, and the moment of inertia of the flywheel Will increase. For this reason, at the time of startup, the startup torque due to the small inertia moment may be small, and the acceleration time from low speed to high speed rotation can be shortened. In addition, since the moment of inertia increases at high speed rotation, a large kinetic energy can be stored, and the function can be performed more effectively.

According to a fourteenth aspect of the present invention, there is provided a load driving device, wherein the rotary shaft is coupled to a load using the flywheel-incorporated rotary electric machine according to any one of the first to thirteenth aspects, and the first and second stators are mounted. Is electrically connected to a battery through a power conversion means for inputting and outputting energy. In a start / acceleration mode of the load, the first rotor is driven by the power conversion means using the battery as a power source, and deceleration is performed. In the mode, rotational energy is given to the flywheel, and when surplus energy is generated or when the charge amount of the battery is insufficient, the rotational energy is recovered from the first rotor to the battery through the first and second stators. be able to.

According to a fifteenth aspect of the present invention, there is provided a driving method of a load driving apparatus, wherein the load driving apparatus according to the fourteenth aspect uses a short-time and high-frequency energy input generated when the load coupled to the rotary shaft is accelerated or decelerated. The output is stored as rotational kinetic energy in the flywheel and stored as chemical energy in the battery when a large amount of energy is input / output for a longer time.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show one embodiment of a rotary electric machine with a built-in flywheel according to the present invention.
An annular first stator 2 is fixed inside the body of the case 1, and the first stator 2 is provided with an armature coil 3 that mainly performs energy conversion with the outside. A first rotor 4 is arranged so as to face the inner peripheral surface of the first stator 2 via a gap, and the first rotor 4 has a center portion supported by a rotating shaft 5.

The first rotor 4 has a permanent magnet 7 disposed on the outer periphery of a first rotor core 6 having a structure in which silicon steel sheets are laminated so as to face the first stator 2. Conductor a8 on one side of the rotor core 6 and a conductor b on the other side.
9 are arranged and these are electrically connected.

The conductor a8 in one bottom of the case 1
An annular second stator 10 is attached at a position facing the first stator 10 via a gap. The second stator 10 is provided with an armature coil 11.

A flywheel 12 is supported by a bearing 13 on the rotating shaft 5 on the side of the first rotor 4 on which the conductive wire b9 is arranged.
On the side opposite to the conducting wire b9,
The second rotor 14 is integrally mounted at a position facing the first rotor 9 via a gap. The second rotor 14 has a structure in which a conductive wire 16 is arranged on a second rotor core 15 attached to the flywheel 12.

In this rotary electric machine incorporating a flywheel,
An engine is connected to one side of the rotating shaft 5, a load device is connected to the other side of the rotating shaft 5, and armature coils 3, 11 arranged on the first stator 2 and the second stator 10 are provided. Is connected to a battery via an inverter (not shown) as external power conversion means, so that the entire system is used as a load driving device.

Next, the operation of the rotary electric machine incorporating the flywheel constructed as described above will be described.

<At the time of deceleration> By supplying electric energy to the armature coil 3 of the first stator 2, the first rotor 4 rotates. The rotating shaft 5 that supports the first rotor 4 is
It exchanges energy with external machines, engines and load devices coupled to it. That is, the rotational force of the first rotor 4 is transmitted to an external machine, and the first rotor 4 is rotationally driven by receiving the rotational energy of the external machine.

For example, when the first rotor 4 starts rotating at a certain speed and then starts decelerating, the armature coil 11 of the second stator 10 is excited, and thereby the lead wire a8 of the first rotor 4 Current is induced. Since the conducting wire b9 is electrically connected to the conducting wire a8, the conducting wire b9 forms a magnetic field by the current induced in the conducting wire a8.
Is rotating, an induced current is generated in the conductor 16 of the second rotor 14 on the flywheel 12 to generate a driving torque, and the second rotor 14 is rotationally driven and integrated therewith. The flywheel 12 rotates. The first rotor 4 decelerates as a reaction to the rotation of the flywheel 12, and the rotational energy of the first rotor 4 when decelerated is converted into rotational energy of the flywheel 12.

<Acceleration> When the first rotor 4 is accelerated, the armature coil 11 of the second stator 10 is excited. As a result, an induced current is generated in the conductor a8 of the first rotor 4 and flows through the conductor b9, so that the conductor 1 of the second rotor 14
6 also produces an induced current. The induced current and the magnetic field created by the conductor b9 of the first rotor 4 generate a rotational force,
The reaction causes the flywheel 12 to decelerate,
Rotor 4 is accelerated. That is, the flywheel 1
2 is converted into the rotational energy of the first rotor 4.

<At the time of load change> Generally, when the load connected to the rotating shaft 5 changes suddenly, and when the load is overloaded, the rotational speed is reduced if the drive has insufficient electrical energy margin. Tends to fluctuate and become unstable. However, in the rotary electric machine with a built-in flywheel according to the present invention, since kinetic energy is stored in the flywheel 12, energy for load fluctuation can be absorbed and supplied by the flywheel 12, and the rotary electric machine with a built-in flywheel is stable. Driving is possible.

Next, a rotary electric machine incorporating a flywheel according to a second embodiment of the present invention will be described with reference to FIG. In the flywheel-mounted rotary electric machine according to the second embodiment, an annular first stator 2 is fixed inside a body of a case 1,
The first stator 2 is provided with an armature coil 3 that mainly performs energy conversion with the outside. A first rotor 4 is disposed so as to face an inner peripheral surface of the first stator 2 via a gap, and the center of the first rotor 4 is a rotating shaft 5.
Supported by

The first rotor 4 has a permanent magnet 7 disposed on the outer periphery of a first rotor core 6 having a structure in which silicon steel sheets are laminated so as to face the first stator 2. A conductor a8 is arranged outside one side surface of the rotor core 6 and a conductor b9 is arranged inside the rotor core 6, and these are electrically connected.

The inside of the body of the case 1 includes a stator supporting member 1.
The annular second stator 10 is mounted on the stator support member 17 at a position facing the conductive wire a8 via a gap. The second stator 10 is provided with an armature coil 11.

A second rotor 14 is concentrically arranged in a space inside the second stator 10. The second rotor 14 includes a second rotor core 15 and a conductor 16, and the second rotor core 15 faces a conductor b <b> 9 inside the side surface of the first rotor 4 via a gap. is there. On the rotating shaft 5, further on the side of the second rotor 14, the flywheel 1
2 is supported by bearings 13, and the flywheel 12 and the second rotor 14 are integrated.

The rotary electric machine with a built-in flywheel according to the second embodiment also has an engine connected to one side of the rotary shaft 5 and a load device connected to the other side of the rotary shaft 5.
By connecting the armature coils 3 and 11 arranged on the stator 2 and the second stator 10 to a battery via an inverter (not shown) as external power conversion means,
The whole system is used as a load driving device. The operation is similar to that of the above-described rotary electric machine with a built-in flywheel according to the first embodiment. However, in the rotary electric machine with a built-in flywheel according to the second embodiment, the second stator 10 and the second rotor 14 are arranged concentrically in the radial direction. There is an advantage that the length in the axial direction is shorter than that of the rotary electric machine with a built-in flywheel, and a flat shape can be obtained.

Next, a rotary electric machine incorporating a flywheel according to a third embodiment of the present invention will be described with reference to FIG. In the rotary electric machine with a built-in flywheel according to the third embodiment, an annular first stator 2 is fixed inside a bottom surface of a case 1, and the first stator 2 mainly performs energy conversion with the outside. A child coil 3 is provided. The first rotor 4 is arranged so as to face the side peripheral surface of the first stator 2 via a gap, and the center of the first rotor 4 is supported by the rotating shaft 5.

The first rotor 4 includes a first rotor core 6 having a structure in which silicon steel plates are laminated, and a side surface of the first rotor core 6 facing the first stator 2 faces the first stator 2. The permanent magnet 7 is arranged as described above, and further, a gouge 18 is formed on the outer peripheral portion of the first rotor core 6. A conductor a8 is arranged inside the gouge 18, and a conductor b9 is arranged inside. Are electrically connected.

An annular second stator 10 is mounted inside the body of the case 1 at a position facing the conductive wire a8 via a gap. The second stator 10 is provided with an armature coil 11.

The hollow portion 18 of the first rotor 4 is also provided with the second rotor 14 so as to be radially aligned with the second stator 10.
Is arranged. The second rotor 14 includes a second rotor core 15 and a conductor 16, and the conductor 16 is opposed to a conductor b <b> 9 inside the recess 18 of the first rotor 4 via a gap. A flywheel 12 is supported by a bearing 13 at a position on the rotating shaft 5 beside the first rotor 4, and the flywheel 12 and the second rotor 14 are integrated.

The rotary electric machine with a built-in flywheel according to the third embodiment also has an engine coupled to one side of the rotating shaft 5 and a load device coupled to the other side of the rotating shaft 5.
By connecting the armature coils 3 and 11 respectively arranged on the stator 2 and the second stator 10 to a battery via an inverter (not shown) as external power conversion means, the entire system is Used as a load driving device. The operation is similar to that of the rotary electric machine with a built-in flywheel according to the first and second embodiments. However,
In the flywheel-embedded rotary electric machine according to the third embodiment, the second stator 10 and the second rotor 14 are concentrically arranged in the radial direction similarly to the flywheel-integrated rotary electric machine according to the second embodiment. Since they are arranged side by side, there is an advantage that the length in the axial direction is shorter than that of the rotary electric machine with a built-in flywheel according to the first embodiment, and a flat shape can be obtained.

Next, a rotary electric machine incorporating a flywheel according to a fourth embodiment of the present invention will be described with reference to FIG. In the rotary electric machine with a built-in flywheel according to the fourth embodiment, an annular first stator 2 is fixed inside a bottom surface of a case 1, and the first stator 2 mainly performs energy conversion with the outside. A child coil 3 is provided. A first rotor 4 is arranged so as to face a side peripheral surface of the first stator 2 via a gap, and the first rotor 4 has a center portion supported by a rotation shaft 5.

The first rotor 4 is provided on a side face of the first rotor core 6 having a structure in which silicon steel plates are laminated, facing the first stator 2 so as to face the first stator 2 permanently. The magnet 7 is arranged, and a flange 19 is formed on the outer periphery of the first rotor core 6. The conductors a <b> 8 and b <b> 9 are arranged on the flange 19 so as to be adjacent to each other. It is the structure connected to.

An annular second stator 10 is mounted inside the body of the case 1 at a position facing the conductive wire a8 via a gap. The second stator 10 is provided with an armature coil 11.

A second rotor 14 is arranged so as to be axially aligned with the second stator 10. The second rotor 14 includes a second rotor core 15 and a conductor 16,
Is opposed to the conductor b9 of the first rotor 4 via a gap. A flywheel 12 is supported by bearings 13 at a position on the rotating shaft 5 beside the first rotor 4, and the flywheel 12 and the second
And the rotor 14 are integrated. Therefore, the second rotor 14 is supported by the outer peripheral portion of the flywheel 12.

The rotary electric machine with a built-in flywheel according to the fourth embodiment also has an engine coupled to one side of the rotating shaft 5 and a load device coupled to the other side of the rotating shaft 5.
By connecting the armature coils 3 and 11 respectively arranged on the stator 2 and the second stator 10 to a battery via an inverter (not shown) as external power conversion means, the entire system is Used as a load driving device. The operation is the same as that of the rotary electric machine with a built-in flywheel according to the first to third embodiments.

In the rotary electric machine with a built-in flywheel according to the first to fourth embodiments, as shown in FIG. 6, the first rotor 4 facing the first stator is placed on the facing surface thereof. Rotor core 6 magnetically provided with irregularities 20
Accordingly, since only magnetic irregularities are provided, the structure is simplified, and the degree of freedom in arranging the conductor a8 and the conductor b9 arranged on the first rotor 4 increases.

Further, in the rotary electric machine with a built-in flywheel according to the first to fourth embodiments, the second stator 10 generates an 8-pole rotating magnetic field by the armature coil 11, and The conductor b9 is a two-pole winding, so that the second
The rotational speed of the rotating magnetic field generated by the stator 10 and the rotating speed of the rotating magnetic field on the second rotor 14 can be changed, and the speed of the second rotor 14 is approximately equal to the speed of the first rotor 4. The rotation speed can be increased four times.

In the rotary electric machine with a built-in flywheel according to the first to fourth embodiments, the flywheel 12
Can be modified as shown in FIG. In this flywheel 12, radial grooves 21 are formed at equal angles around the central axis, and a shaft rod 22 is incorporated in each groove 21.
A weight 23 is inserted into the shaft bar 22 so as to be freely slidable, and is pressed from the outside by a spring 24 so that each weight 23 is located at the minimum diameter position in a free state. In addition,
The internal structure of the groove 21 of the flywheel 12 may be as shown in FIG. In this case, a structure is used in which a force for pulling the weight 23 toward the central axis by the spring 24 is applied. With the structure shown in FIG. 7 or FIG. 8, when the flywheel 12 increases the rotation speed, each weight 23 moves in the outer peripheral direction against the force of the spring 24 due to the centrifugal force, As a result, the inertial mass of the flywheel 12 as a whole increases, and the moment of inertia also increases. That is, at the time of startup, the moment of inertia is minimum, the startup torque can be reduced, and the acceleration time from low speed to high speed can be shortened. At the time of high-speed rotation, the moment of inertia becomes large, so that large kinetic energy can be stored.

Next, a description will be given of a load driving apparatus using a rotary electric machine incorporating a flywheel according to a fifth embodiment of the present invention and an operation method thereof with reference to FIG. The load driving device using the flywheel-incorporated rotary electric machine uses any of the flywheel-incorporated rotary electric machines 30 described in the first to fourth embodiments, and is similar to the conventional example shown in FIG. The engine / wheel 31 is connected to the rotating shaft 5 and the armature coil 3 of the first stator 2 of the rotating electric machine 30 is connected to the second
And the armature coil 11 of the stator 10 is connected to a battery 33 via an inverter 32 as power conversion means.

The load driving apparatus using the rotary electric machine with a built-in flywheel according to the fifth embodiment operates as follows.

<During Start / Acceleration> The rotary electric machine 3 incorporating the flywheel from the inverter 32 using the battery 33 as a power source.
0, the current is applied to the armature coil 3 of the first stator 2 and the current is simultaneously applied to the armature coil 11 of the second stator 10 to rotate and drive the first rotor 4. The motor 30 is operated by an electric motor to start the engine of the engine / wheel 31 with a large acceleration torque or to accelerate the wheel.

At the time of acceleration, the accumulated energy of the flywheel 12 is given as electromagnetic energy from the second rotor 14 to the first rotor 4 together with the electromagnetic energy from the first stator 2, so that a larger acceleration torque is obtained. Is obtained.

<At the time of deceleration / braking> Of the engine / wheel 31, the flywheel 12 absorbs the kinetic energy of the vehicle as rotational energy via the wheel. When surplus energy is generated or when the charge amount of the battery 33 is insufficient, the rotating electric machine 30 is operated as a generator, and rotational energy from the wheels is transferred from the first rotor 4 to the first stator 2. To the inverter 32 and store it in the battery 33 as electrochemical energy.

At the time of deceleration, the rotational energy of the wheels is mainly stored in the flywheel 12, and at the same time, the rotation of the flywheel 12 causes a power generation action between the second rotor 14 and the second stator 10. Thus, an induced current is also generated in the armature coil 11 of the second stator 10, and the induced current can be collected in the battery 33 through the inverter 32.

As a result, the rotating electric machine 3
0 is capable of accumulating a part of kinetic energy in the flywheel 12 instead of operating the generator in the same manner as in the prior art and flowing a large charging current to the battery, so that the flywheel 12 functions as an energy buffer. Thus, the life of the battery 33 can be extended.

[0063]

As described above, according to the flywheel incorporating rotary electric machine according to the first to fifth aspects of the present invention, at the time of deceleration, the kinetic energy of the load can be converted into the rotational energy of the flywheel and stored, so that the battery In the case of energy regeneration, a large current is not charged / discharged, and the life thereof can be extended. In addition, during acceleration, the rotation energy of the flywheel is reduced by the rotation of the first rotor together with the rotation of the first rotor by an external power supply. Can be converted to the rotational energy of the rotor, and the acceleration torque can be increased. Furthermore, in the case where the load changes suddenly during normal rotation or in the case of overload, kinetic energy is stored in the flywheel, so that energy for load fluctuation can be absorbed and supplied, and stable rotation operation is possible.

According to the third aspect of the present invention, since the second stator and the second rotor are arranged on the same plane, they are structurally long in the rotation axis direction. Can be shortened.

According to the flywheel-incorporated rotary electric machine of the invention, the surface of the first rotor facing the second stator, the surface facing the second rotor, and the second rotor Since the conductor is disposed on each of the surfaces facing the first rotor in (1), an induced current can flow through the conductor.

According to the rotary electric machine incorporating the flywheel according to the seventh aspect of the present invention, since the permanent magnet is disposed on the surface of the first rotor facing the first stator, the field current is not required, and the field current is not required. Is simplified, and the degree of freedom in arranging the conductors of the first rotor increases.

According to the flywheel-incorporated rotary electric machine according to the eighth aspect of the present invention, the first rotor has a simple structure in which only the surface facing the first stator is provided with magnetic asperities, and the first rotor has the first structure. The degree of freedom in arranging the conductors of the rotor increases.

According to the flywheel incorporating rotary electric machine of the ninth aspect of the present invention, the second rotor and the flywheel are structurally integrated, so that the size can be reduced.

According to the tenth aspect of the present invention, the number of poles of the magnetic field generated by the conductor on the surface facing the second stator in the first rotor, and Since the number of poles of the magnetic field generated by the conductor on the facing surface is made different, the angular velocity between the rotating magnetic field created by the second stator and the rotating magnetic field on the second rotor can be changed. It is possible to make the speed of the second rotor several times smaller or several times higher than the speed of the first rotor.

According to the rotary electric machine with a built-in flywheel according to the present invention, the required starting torque can be reduced by reducing the moment of inertia at the time of startup, the acceleration time from low speed to high speed can be shortened, and high speed rotation can be achieved. At times, a large kinetic energy can be accumulated by increasing the moment of inertia, and the action can be performed more effectively.

According to the load driving apparatus using the rotary electric machine with a built-in flywheel according to the fourteenth aspect of the present invention, the first and second stators of the rotary electric machine with a built-in flywheel are electrically connected to a battery via power conversion means. In the load start / acceleration mode, the battery is used as a power source to drive the first rotor by the power conversion means. In the deceleration mode, rotational energy is given to the flywheel, and excess energy is generated. When this occurs, or when the battery charge is insufficient, rotational energy can be efficiently recovered from the first rotor to the battery through the first and second stators.

According to the driving method of the load driving device of the invention, the input and output of energy in a short time and frequently occur during the acceleration and deceleration of the load coupled to the rotating shaft of the rotary electric machine incorporating the flywheel. When a large amount of energy is input and output over a longer period of time, the battery can be stored as chemical energy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotary electric machine incorporating a flywheel according to a first embodiment of the present invention.

FIG. 2 is a side view of the first rotor viewed from the direction of arrow A in FIG. 1;

FIG. 3 is a sectional view of a rotary electric machine incorporating a flywheel according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a rotary electric machine incorporating a flywheel according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a rotary electric machine incorporating a flywheel according to a fourth embodiment of the present invention.

FIG. 6 is a side view showing a modified example of the first rotor in the rotary electric machine with a built-in flywheel according to the first to fourth embodiments.

FIG. 7 is a side view showing a modified example of a flywheel in the rotary electric machine with a built-in flywheel according to the first to fourth embodiments.

FIG. 8 is a side view showing another modified example of the flywheel in the rotary electric machine with a built-in flywheel according to the first to fourth embodiments.

FIG. 9 is a system configuration diagram of a load drive device using a rotary electric machine incorporating a flywheel according to a fifth embodiment of the present invention.

FIG. 10 is a partial cross-sectional view of a conventional load driving device.

FIG. 11 is a system configuration diagram of a conventional load driving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 1st stator 3 Armature coil 4 1st rotor 5 Rotating shaft 6 1st rotor core 7 Permanent magnet 8 Conductor a 9 Conductor b 10 2nd stator 11 Armature coil 12 Flywheel 13 Bearing 14 Second Rotor 15 Second Rotor Core 16 Conductor 21 Groove 22 Shaft Bar 23 Weight 24 Spring 30 Flywheel Built-in Rotary Electric Machine 31 Engine / Wheel 32 Inverter 33 Battery

Claims (15)

[Claims] 1. A first stator having a first armature coil that mainly performs energy conversion with the outside, and a first rotation disposed so as to face the first stator via an air gap. A second stator having a second armature coil and being arranged to face the first rotor via another air gap; and a second stator independent of a rotation axis of the first rotor. And a second rotor coupled to the flywheel at a position opposite to the first rotor via a further air gap. Embedded rotary electric machine. 2. A rotary shaft, which is disposed so as to face a first stator having a first armature coil that mainly performs energy conversion with the outside via an air gap inside the first stator. A first rotor supported on the first rotor, a second stator having a second armature coil disposed on one side of the first rotor via a gap, and 2. The vehicle according to claim 1, further comprising: a second rotor disposed so as to face the other side of the rotor via a gap, and a flywheel supported by the rotation shaft and coupled to the second rotor. 3. The described rotary electric machine with a built-in flywheel. 3. A rotating shaft, which is disposed so as to face a first stator having a first armature coil for mainly performing energy conversion with the outside via an air gap inside the first stator. And a second stator having a second armature coil disposed to face one side of the first rotor via a gap, and A second rotor disposed at a position inside the stator and facing the one side of the first rotor via a gap, and a second rotor supported by the rotation shaft; 2. The rotary electric machine with a built-in flywheel according to claim 1, comprising a flywheel coupled to the flywheel. 4. A first stator having a first armature coil which mainly performs energy conversion with the outside, and is disposed so as to face a side of the first stator via an air gap and rotate. A first stator having a first rotor supported by a shaft, a second stator having a second armature coil disposed so as to face an outer periphery of the first rotor via a gap, and A second rotor disposed inside the outer periphery of the first rotor so as to face the first rotor via a circumferential gap, and a second rotor supported by the rotating shaft, 2. The rotary electric machine with a built-in flywheel according to claim 1, comprising a rotor and a flywheel coupled to the rotor. 5. A first stator having a first armature coil which mainly performs energy conversion with the outside, and a first stator having a first armature coil disposed opposite to a side of the first stator via an air gap, and having a rotation. A first stator having a first rotor supported by a shaft, a second stator having a second armature coil disposed so as to face an outer periphery of the first rotor via a gap, and A second rotor disposed on the outer periphery of the rotor via a gap adjacent to a gap with the second stator, the second rotor being supported by the rotating shaft, The rotary electric machine with a built-in flywheel according to claim 1, comprising a flywheel and a flywheel coupled to the flywheel. 6. A surface of the first rotor facing the second rotor, a surface of the first rotor facing the second rotor, and a surface of the second rotor facing the first rotor. The rotary electric machine with a built-in flywheel according to any one of claims 1 to 5, wherein a conductor is disposed on a surface to be formed. 7. The rotary electric machine with a built-in flywheel according to claim 1, wherein a permanent magnet is disposed on a surface of the first rotor facing the first stator. 8. The flywheel built-in rotation according to claim 1, wherein a surface of said first rotor facing said first stator is provided with magnetic irregularities. Electric machine. 9. The system according to claim 1, wherein said second rotor and said flywheel are structurally integrated.
A rotary electric machine incorporating a flywheel according to any one of the above. 10. In the first rotor, the second rotor
Wherein the number of poles of a magnetic field formed by a conductor on a surface facing the stator is different from the number of poles of a magnetic field formed by a conductor on a surface facing the second rotor. 10. The rotary electric machine incorporating a flywheel according to any one of 9 above. 11. The rotary electric machine with a built-in flywheel according to claim 1, wherein the flywheel is provided with a variable mechanism of its inertial mass. 12. The variable mechanism of the inertial mass of the flywheel, wherein a plurality of weights are arranged on the flywheel in an equal direction about a rotation axis, and each of the plurality of weights is supported so as to be movable in a radial direction. The rotary electric machine with a built-in flywheel according to claim 11, having a structure. 13. The flywheel inertia mass variable mechanism has a structure in which each of the plurality of weights is connected to the flywheel by a spring so that a force acts on radial movement of the flywheel. The rotary electric machine with a built-in flywheel according to claim 12. 14. The method according to claim 14, wherein the rotating shaft is coupled to a load,
14. The rotary electric machine with a built-in flywheel according to any one of claims 1 to 13, wherein the second stator is electrically connected to a battery via power conversion means to input and output energy. Load drive. 15. The method according to claim 15, wherein the first and second stators are electrically connected to a battery via a power conversion means, and a short-time and high-frequency energy generated when the load coupled to the rotating shaft is accelerated or decelerated. The operation of the load driving device according to claim 14, wherein the input / output is stored as rotational kinetic energy in the flywheel, and when a large amount of energy is input / output in a longer time, the battery is stored as chemical energy. Method.