JP2003120765A - Adjustable speed motor generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjustable speed motor generator simplifying and compacting structure of a planetary gear transmission, and improving durability. SOLUTION: This adjustable speed motor generator 1 is provided with a motor generator 2, the planetary gear transmission 3 connected to a rotor shaft 21, and an input/output shaft 31 of the planetary gear transmission 3 to be driven by an engine E. The planetary gear transmission 3 comprises a casing 33, an internal gear 41 disposed in the casing 33, a sun gear 42 disposed at a center of the internal gear 41, and a planetary gear set 4 comprising a plurality of planetary gears 44 disposed between the internal gear 41 and the sun gear 42, and connected to a carrier 43. A sun gear shaft 45 of the sun gear 42 is connected to the rotor shaft 21, and a carrier shaft 46 of the carrier 43 is connected to the input/output shaft 31. A first clutch 5 is provided between the carrier shaft 46 and the sun gear shaft 45, and a second clutch 6 is provided between the internal gear 41 and the casing 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed motor / generator in which a planetary gear transmission and a motor / generator are combined.

[0002]

2. Description of the Related Art There is known a motor / generator which can save space in an engine room by utilizing a generator for power generation driven by an engine as a starter motor for assisting engine starting. This motor / generator needs to generate a large torque for starting assistance for driving the engine, and needs to be driven to rotate at high speed for power generation driven by the engine. Therefore, a normal generator can be used as it is for a small engine that requires a small drive torque to start the engine, but if it is applied to a large engine that requires a large drive torque to start the engine, a torque shortage will occur.

European Patent No. EP0384808B1 proposes a variable speed motor generator in which a planetary gear transmission consisting of one planetary gear set and two clutches is added to the motor generator. This variable speed motor / generator reduces the rotation of the motor / generator by the planetary gear transmission to increase the output torque when the engine is started, and transmits the rotation of the engine to the motor / generator at a constant speed during power generation. Enables the start of large engines.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The generator uses a planetary gear transmission that includes a first one-way clutch that connects and disconnects an internal gear of a planetary gear set, and a second one-way clutch that connects and disconnects a carrier and an internal gear. However, when the two clutches are arranged in the internal gear in this way, the structure in the vicinity of the internal gear becomes complicated, the planetary gear transmission becomes large, and the assembling property deteriorates. Further, since the first one-way clutch has a large diameter and a high rotation peripheral speed, sliding wear of the sprags in the open state is large and durability is likely to deteriorate.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a variable speed motor / generator capable of simplifying and downsizing the structure of a planetary gear transmission and improving durability.

[0006]

According to the present invention, there is provided a motor generator, a planetary gear transmission connected to a rotor shaft of the motor generator, and an input / output shaft of the planetary gear transmission. In a variable speed motor / generator, a planetary gear transmission includes a casing, an internal gear arranged in the casing, a sun gear arranged at the center of the internal gear, and a gear arranged between the internal gear and the sun gear. And a planetary gear set consisting of a plurality of planetary gears connected to the carrier.The sun shaft of the sun gear is connected to the rotor shaft, the carrier shaft of the carrier is connected to the input / output shaft, and the carrier shaft and the sun gear shaft are connected. And a first clutch is provided between the internal gear and the casing, and a second clutch is provided between the internal gear and the casing. The input / output shaft is a pulley shaft on which a pulley is installed, and the pulley is connected to the crank shaft of the engine by a belt.

In the present invention, the first clutch is provided between the carrier shaft and the sun gear shaft, and the second clutch is provided between the internal gear and the casing. Therefore, compared to the case where two clutches are arranged in the internal gear, the structure in the vicinity of the internal gear can be simplified, the planetary gear transmission can be downsized, and the assembling property is excellent. Further, since the diameter of the first clutch can be reduced, wear due to sliding of the clutch member can be reduced and durability can be improved.

According to a second aspect of the invention, the first clutch is disengaged and the second clutch is engaged at least when the engine is started. As a result, when the engine is started, the rotational speed can be further reduced between the rotor shaft and the input / output shaft, and the torque of the input / output shaft is increased with respect to the torque of the rotor shaft. Therefore, it is possible to start a large engine with a small variable speed motor / generator.

According to the third aspect of the invention, the first clutch is a first one-way clutch that transmits only the rotation in one direction of the carrier shaft to the sun gear shaft, and the second clutch is a direction opposite to the one direction in the internal gear. It is characterized by being a second one-way clutch that prohibits only rotation. With this configuration, the clutch can be engaged and disengaged without a control means, and a variable speed motor / generator having a simple structure, a small size, and an inexpensive structure can be obtained. Further, since the diameter of the first one-way clutch can be made small, wear of the sprag due to rotation at the time of disengagement is small and durability is excellent.

According to a fourth aspect of the present invention, the internal gear separates the second clutch from the fixed member in a predetermined rotation speed region in a non-contact manner. In this configuration, during power generation, the second clutch is opened and the rotary component and the fixed component of the second clutch are separated so as not to come into contact with each other.
Since this may cause wear due to sliding (contact idling) of the second clutch, the wear of the clutch member due to sliding is prevented by separating the second clutch from the fixed member in a non-contact manner.

According to a fifth aspect of the present invention, the second clutch is a second one-way clutch and is held by the internal gear, and when the predetermined rotational speed range is reached, the second clutch is disengaged by centrifugal force. To do. In this configuration, the cam (sprag) of the second one-way clutch is held by the internal gear to which the centrifugal force due to the rotation acts, so that the cam is separated from the fixed member in a non-contact manner when the input / output shaft reaches a predetermined rotation speed. To do. For this reason, non-contact separation at the time of power generation can be performed automatically (mechanically) without requiring special control, and a simple and small variable speed motor / generator can be realized.

According to the sixth aspect of the present invention, at least when the engine is started, the first clutch is disengaged and the second clutch is engaged. Under a predetermined engine operating condition, the first clutch is engaged and the second clutch is engaged. It is characterized by opening the clutch. As a result, the rotation speed can be increased between the input / output shaft and the rotor shaft, and the motor / generator can be rotated at high speed without increasing the engine speed.

For this reason, when a larger amount of power generation is required due to the state of charge of the battery, the usage of electric equipment such as air conditioning, the use of accessories such as car navigation, etc., the engine control unit ECU
The amount of power generation can be increased by rotating the generator at high speed. As a result, a large amount of electric power can be used even when the engine is rotating at a low speed such as idling, and convenience such as use of office equipment in a car and comfort such as use of a refrigerator can be improved.

According to a seventh aspect of the present invention, the first clutch is disengaged and the second clutch is engaged at least when the engine is started, and the rotational speed of the carrier and the rotational speed of the sun gear are maintained while the first clutch is disengaged. It is characterized in that the first clutch is engaged when the relative rotational speed between and becomes lower than a predetermined value.

In this configuration, the first
When the first clutch is engaged in order to shift the engine to the complete power generation state after the clutch is released from the state where the clutch is released, a large load is applied to the first clutch due to the difference in rotational speed between the carrier shaft and the sun gear shaft. Therefore, the rotation speed of the carrier shaft and the relative rotation speed (rotation speed) of the sun gear shaft are controlled by the ECU so that the rotation speed is equal to or lower than the target relative rotation speed with less impact, and the load applied to the first clutch is reduced.

According to the eighth aspect of the invention, the ECU controls the relative rotational speed between the rotational speed of the carrier and the rotational speed of the sun gear by driving the motor / generator even after the engine has completely exploded. Thus, for example, the rotation speed of the carrier is detected from the engine rotation speed, and the rotation speed of the motor / generator, which is the rotation speed of the sun gear, is controlled to reach the target relative rotation speed. As a result, the transition from the starting state to the power generation state can be performed more smoothly and in a short time.

According to a ninth aspect of the invention, when the rotational speed of the internal gear is decelerating and is lower than near the opening rotational speed of the second one-way clutch, the deceleration of the internal gear becomes equal to or less than a predetermined value. In addition, the motor generator is controlled by the ECU.

As a result, when the engine is stopped while the first clutch (or the first one-way clutch) is engaged while the engine is operating, the rotational speed of the internal gear holding the cam of the second one-way clutch is rapidly increased. When it decreases, an impact force is generated in the second one-way clutch. Therefore, when the engine is stopped, that is, when the rotation of the internal gear is decelerating and is less than or equal to the separation (release) rotation speed of the second one-way clutch, the motor / generator is drive-controlled to control the rapid rotation of the internal gear. By preventing the decrease, the damage of the second one-way clutch can be prevented.

According to a tenth aspect of the invention, the bearing of the internal gear is provided on the outer periphery of the carrier. By providing the bearing of the internal gear on the outer periphery of the carrier, the internal gear and the carrier rotate integrally while the engine is operating, and the bearing is fixed. Therefore, the bearing can be prevented from rotating at high speed even when the engine rotates at high speed, and the durability can be improved.

In the eleventh aspect of the invention, the first clutch is installed on the input / output shaft (pulley) side with respect to the sun gear. As a result, the planetary gear transmission can be easily assembled.

According to the twelfth aspect of the invention, the second clutch is installed on the outer periphery of the input / output shaft (carrier shaft). As a result, the distance between the bearings for ensuring the bearing strength of the input / output shaft can be increased and a space can be secured for the outer circumference of the bearing. By disposing the second clutch in the space on the outer periphery of the bearing, the planetary gear transmission can be downsized.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described based on a first embodiment shown in FIG. The variable speed motor / generator 1 is
Motor generator 2 and the motor generator 2
The planetary gear transmission 3 connected to the rotor shaft 21 of the rotor 20 of FIG. The variable speed motor / generator 1 functions as a starter motor that assists in starting the engine E and as a generator that is driven by the engine E to generate electricity. The planetary gear transmission 3 has an input / output shaft 31, a pulley 32 is attached to the tip of the input / output shaft 31, and the pulley 32 is connected to the crank shaft of the engine E by a belt (not shown).

The planetary gear transmission 3 includes a casing 33 fastened to the motor / generator 2, a planetary gear set 4 arranged between the rotor shaft 21 and the input / output shaft (pulley shaft) 31, and a first clutch 5. And a second clutch 6.
As the first clutch 5 and the second clutch 6, a multi-plate clutch or an electromagnetic clutch can be used, and engagement and disengagement are performed by hydraulic pressure or electromagnetic force. Note that only one of the first clutch 5 and the second clutch 6 may be a one-way clutch.

The planetary gear set 4 is arranged between an internal gear (ring gear) 41 arranged in the casing 33, a sun gear 42 arranged at the center of the internal gear 41, and between the internal gear 41 and the sun gear 42. And a plurality of planet gears 44 connected to the carrier 43. The carrier 43 is arranged on the pulley 32 side of the planetary gear 44.

The sun gear shaft 45 of the sun gear 42 is arranged so as to project from the sun gear 42 to the pulley 32 side, and is integral with the rotor shaft 21, and the carrier shaft 46 of the carrier 43.
Is integrated with the input / output shaft (pulley shaft) 31. First
The clutch 5 is provided inside the carrier 43, between the carrier 43 and the sun gear shaft 45, and the second clutch 6 is provided between the inner circumference of the casing 33 and the outer circumference of the internal gear 41.

In this embodiment, the first clutch 5 is provided between the carrier 43 and the sun gear shaft 45, and the second clutch 6 is provided between the internal gear 41 and the casing 33. Therefore, as compared with the case where two clutches are arranged in the internal gear 41, the structure in the vicinity of the internal gear 41 can be simplified and the planetary gear transmission 3 can be downsized, so that it is excellent in mountability on the engine E. Further, since the diameter of the first clutch 5 is small, the sliding speed associated with the relative rotation of the clutch components when the clutch is disengaged can be slowed down, and deterioration with time due to wear can be reduced.

The variable speed motor / generator 1 operates as follows. When the engine is started, the first clutch 5 is disengaged and the second clutch 6 is engaged by the engine control unit (ECU). motor·
The generator 2 is energized by the ECU and the rotor shaft 2
The sun gear 42 attached to 1 rotates. The rotation of the sun gear 42 imparts a rotational force to the planetary gear 44 and the internal gear 41.
Is fixed to the casing 33 via the second clutch 6, the carrier 43 (carrier shaft 46) is the sun gear 42 (sun gear shaft 45), that is, the input / output shaft (pulley shaft).
It rotates in the same direction as 31.

The rotation of the carrier shaft 46 drives the engine E via the input / output shaft (pulley shaft) 31 and the pulley 32. At this time, the rotor shaft 21 and the input / output shaft (pulley shaft) 3
1, the inner diameter of the internal gear 41 and the sun gear 4
A reduction ratio corresponding to the ratio of 2 to the outer diameter. That is, when the engine is started, the planetary gear transmission 3 causes the rotor shaft 21 to move.
The rotational speed is reduced between the input / output shaft 31 and the input / output shaft 31, and the drive torque increases. As a result, a large engine can be started by the small motor / generator 2 (corresponding to claim 2).

With the complete explosion of the engine, the rotation speeds of the pulley 32, the input / output shaft 31, and the carrier 43 rapidly increase. At this time, the second clutch 6 is released, and the ECU calculates the rotation speed of the carrier 43 from the rotation speed of the engine, and controls the rotation speed of the rotor shaft 21 using this as the target rotation speed.
When the relative rotation speed between the carrier 43 and the rotor shaft 21 becomes equal to or lower than a predetermined value, the first clutch 5 is engaged.

After that, with the first clutch 5 engaged and the second clutch 6 disengaged, the rotation of the engine is reduced to the pulley 3
2. The carrier 43 is driven via the input / output shaft 31. In this state, since the carrier 43 and the sun gear 42 rotate integrally, the internal gear 41 also rotates integrally.
The rotation of the carrier 43 is caused by the first clutch 5 to rotate the rotor shaft 2
1 is transmitted without deceleration, and power is generated by the motor / generator 2.

That is, when the engine is operated as a generator, the first clutch 5 is engaged and the second clutch 6 is released to disengage the rotor shaft 21.
Since the input / output shaft (pulley shaft) 31 rotates integrally, the rotation speed of the motor / generator 2 is not reduced and the amount of power generation is secured (corresponding to claim 6).

When the ECU determines that a larger amount of power generation is required during engine operation, the first clutch 5
Is released and the second clutch 6 is engaged. Power from the engine E is transmitted through the pulley 32 and the input / output shaft 31 to the carrier 43.
To drive. Since the internal gear 41 is fixed to the casing 33 that is a fixing member of the second clutch 6,
The sun gear 42 and the rotor shaft 21 rotate from the planetary gear 44, and the rotation of the motor / generator 2 is accelerated to increase the amount of power generation (corresponding to claim 6).

2 and 3 show an embodiment of the invention described in claims 3, 5, and 9. In this embodiment, the first clutch 5
And the second clutch 6 are both the first one-way clutch 5
0 and the second one-way clutch 60.
The first one-way clutch 50 has a structure in which a large number of cams (sprags) 53 that allow rotation only in one direction (C direction in the drawing) are interposed between an inner race 51 and an outer race 52. Cam (sprag) 53 is cage 54
(See FIG. 4).

The second one-way clutch 60 has a large number of cams (sprags) 63 between the inner race 61 and the outer race 62 which allow rotation only in the direction opposite to the first one-way clutch 50 (direction D in the drawing). It has a structure. The cam (sprag) 63 is a cage 64 (see FIG. 4)
Is held by. With this configuration, no driving means is required for engaging and disengaging the clutch, and a large torque for starting the engine and a high-speed rotation during power generation can be achieved with a simple configuration (corresponding to claim 3).

An embodiment of the invention described in claim 4 will be described. When the internal gear 41 is in the predetermined rotation speed range,
The clutch 6 is opened so that the fixed member and the rotating member are separated in a non-contact manner. As a result, when the stationary member and the rotating member slide due to contact idling of the second clutch 6, they can be separated in a non-contact manner to prevent abrasion of the clutch member due to sliding. The non-contact separation of the fixed member and the rotating member is
Well-known means used in a multi-plate clutch such as an automatic transmission can be adopted.

An embodiment of the invention described in claim 5 will be described. The second one-way clutch 60 is the internal gear 4
It is held at 1, and when it reaches the predetermined rotation speed range,
Release by centrifugal force. In this configuration, the cam (sprag) 63 of the second one-way clutch 60 is held by the internal gear 41 on which centrifugal force due to rotation acts, so that the cam 63 is fixed when the input / output shaft 31 reaches a predetermined rotation speed range. The inner race 61, which is a member, is separated without contact. Therefore, non-contact separation can be performed mechanically during power generation, and a simple and small variable speed motor / generator 1 can be realized.

An embodiment of the invention described in claim 6 will be described. In this embodiment, at least when the engine is started, the first clutch 5 is disengaged and the second clutch 6 is engaged, and under a predetermined engine operating condition, the first clutch 5 is engaged and the second clutch 6 is disengaged. . As a result, when a larger amount of power generation is required due to the state of charge of the battery or the state of use of electric equipment, the motor / generator 2 can be driven at high speed without increasing the engine speed, and the amount of power generation can be increased. Will be possible.

An embodiment of the invention described in claim 7 will be described. In this embodiment, at least when the engine is started, the first clutch 5 is disengaged, the second clutch 6 is engaged, and the carrier shaft 4 is disengaged while the first clutch 5 is disengaged.
The first clutch 5 is engaged when the relative rotational speed between the rotational speed of 6 and the rotational speed of the sun gear shaft 45 is a predetermined value or less.

In this structure, the first for starting the engine.
When the first clutch 5 is engaged in order to shift the engine to the complete explosion state and the power generation state from the state where the clutch 5 is disengaged, the first rotational speed difference between the carrier shaft 46 and the sun gear shaft 45 causes
A large load is applied to the clutch 5. Therefore, the rotation speed of the carrier shaft 46 and the relative rotation speed of the sun gear shaft 45 are controlled so as to reach the target relative rotation speed, and the load applied to the first clutch 5 is reduced.

An embodiment of the invention described in claim 8 will be described. In this embodiment, the relative speed between the rotation speed of the carrier 43 and the rotation speed of the sun gear 42 is controlled by driving the motor generator 2 even after the complete explosion of the engine. Thus, for example, the rotation speed of the carrier shaft 46 is detected from the engine rotation speed, and the rotation speed of the motor / generator 2 that is the rotation speed of the sun gear shaft 45 is controlled so that the target relative rotation is achieved. As a result, it is possible to shift from the starting state to the power generation state in a short time.

An embodiment of the invention described in claim 9 will be described. In this embodiment, when the rotation speed of the internal gear 41 is decelerating and is lower than the opening rotation speed of the second one-way clutch 60, the motor / generator 2 is controlled so that the deceleration of the internal gear 41 becomes equal to or lower than a predetermined value.
Is controlled by the ECU.

As a result, when the engine is stopped while the first one-way clutch 50 is engaged during the operation of the engine, if the rotation speed of the internal gear 41 holding the cam 63 of the second one-way clutch 60 decreases rapidly. An impact force is generated in the first one-way clutch 50. Therefore, when the engine is stopped, that is, the rotation of the internal gear 41 is decelerating and the second one-way clutch 6
When the rotational speed is equal to or less than 0 (separation (open)), the motor / generator 2 is drive-controlled to prevent a rapid decrease in the rotational speed of the internal gear 41, thereby preventing damage to the first one-way clutch 50.

The invention described in claims 10 to 12 will be described together with the embodiment shown in FIG. In this embodiment, the casing 33 has a large diameter cylindrical portion 34 having one end fastened to the casing 22 (see FIG. 2) of the motor / generator 2, a side wall portion 35 provided at the other end of the large diameter cylindrical portion 34, and a side wall. The small diameter cylindrical portion 36 protruding from the portion 35 to the pulley 32 side.
The side wall portion 35 is provided with a small diameter inner cylinder portion 37 protruding toward the motor / generator 2 side. Internal gear 41
And a carrier 43, a first bearing 47 is arranged, and a second bearing 48 is provided between the small diameter inner cylinder portion 37 and the carrier shaft 46.
And a third bearing 49 is arranged between the tip of the small diameter tubular portion 36 and the input / output shaft 31.

In the tenth aspect of the invention, the first bearing 47 of the internal gear 41 is provided on the outer periphery of the carrier 43. With this configuration, the internal gear 41 and the carrier 43 rotate integrally during engine operation (during power generation by the motor / generator 2), so the first bearing 47 does not rotate. Therefore, it is possible to prevent the first bearing 47 from rotating at a high speed due to the engine rotating at a high speed during power generation by the motor / generator 2 which occupies most of the usage state. As a result, wear of the first bearing 47 is reduced and durability is improved.

In the eleventh aspect of the invention, the first one-way clutch 50 is installed on the input / output shaft 31 side with respect to the sun gear 42. First one-way clutch 50
The sun gear shaft 45 has an inner race 51 and a carrier 4
3 is an outer race 52, and a cam (sprag) 53 held by a cage 54 is interposed between the inner race 51 and the outer race 52. With this configuration, the planetary gear transmission 3 is connected to the motor generator 2
It will be easy to assemble to.

According to the twelfth aspect of the invention, the second one-way clutch 60 is installed on the outer periphery of the carrier shaft 46. The second one-way clutch 60 includes an inner race 61 and an internal gear 41 that are fitted onto the small diameter inner tubular portion 37.
Between the outer race 62 that extends the pulley 32 side,
It has a configuration in which a sprag (cam) 63 held by a cage 64 attached to the internal gear 41 is interposed.

With this structure, the bearing distance between the second bearing 48 holding the carrier shaft 46 and the third bearing 49 holding the input / output shaft 31 can be increased, and the bearing strength can be secured. In addition, the outer circumference of the second bearing 48 (the small diameter inner cylindrical portion 3
A space can be secured around (7 outer circumference), and by disposing the second one-way clutch 60 in this space, the size of the planetary gear transmission 3 in the axial direction can be reduced.

[Brief description of drawings]

FIG. 1 is a skeleton diagram of a variable speed motor / generator.

FIG. 2 is a skeleton view of a variable speed motor / generator according to another embodiment.

3 is a sectional view taken along the line AA and a sectional view taken along the line BB in FIG.

FIG. 4 is a sectional view of an essential part of a variable speed motor / generator of another embodiment.

[Explanation of symbols]

1 Variable speed motor / generator 2 motor generator 21 rotor shaft 3 planetary gear transmission 31 Input / output shaft (pulley shaft) 4 planetary gear set 41 Internal Gear 42 Sun Gear 43 career 44 Planetary gear 45 sun gear shaft 46 Carrier axis 5 First clutch 50 1st one-way clutch 6 second clutch 60 Second one-way clutch E engine ECU engine control unit

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3J028 EA09 EA25 EA28 EB04 EB33                       EB35 EB42 EB62 FB03 FC13                       FC23 FC62 HA11 HA26                 3J552 MA02 NA09 NB01 PA67 SA02                       SB33 VA32W VA37W                 5H607 AA14 BB01 BB02 BB05 BB14                       BB26 CC03 DD03 DD19 EE02                       EE33 FF11 FF22

Claims (12)

[Claims] 1. A generator driven by an engine and a starter for the engine, which comprises a motor generator, a planetary gear transmission connected to a rotor shaft of the motor generator, and an input / output shaft of the planetary gear transmission. In a variable speed motor / generator used as a motor, the planetary gear transmission includes a casing, an internal gear arranged in the casing, a sun gear arranged at the center of the internal gear, and the internal gear and the sun gear. And a planetary gear set consisting of a plurality of planetary gears connected to the carrier, the sun gear shaft of the sun gear being connected to the rotor shaft, and the carrier shaft being connected to the input / output shaft. A carrier clutch is connected, and a first clutch is provided between the carrier shaft and the sun gear shaft. A variable speed motor / generator characterized in that a second clutch is provided between the internal gear and the casing. 2. The variable speed motor / generator according to claim 1, wherein the first clutch is disengaged and the second clutch is engaged at least when the engine is started. 3. The variable speed motor / generator according to claim 2, wherein the first clutch is a first one-way clutch that transmits only one-direction rotation of the carrier shaft to the sun gear shaft, and the second clutch. Is a second one-way clutch that prohibits only rotation of the internal gear in a direction opposite to the one direction. 4. The variable speed motor generator according to claim 2, wherein the internal gear separates the second clutch from a fixed member in a predetermined rotation speed region in a non-contact manner. generator. 5. The variable speed motor / generator according to claim 4, wherein the second clutch is a second one-way clutch held by the internal gear, and when a predetermined rotation speed region is reached, centrifugal force is applied. A variable speed motor / generator characterized by being separated from a fixed member in a non-contact manner. 6. The variable speed motor / generator according to claim 2, wherein the first clutch is engaged and the second clutch is released under a predetermined engine operating condition. . 7. The variable speed motor / generator according to claim 2, wherein a relative rotational speed between the rotational speed of the carrier and the rotational speed of the sun gear is equal to or less than a predetermined value while the first clutch is disengaged. A variable speed motor / generator, characterized in that the first clutch is engaged in some cases. 8. The variable speed motor generator according to claim 7, wherein the relative speed between the rotation speed of the carrier and the rotation speed of the sun gear is controlled by driving the motor generator. Variable speed motor / generator. 9. The variable speed motor / generator according to claim 5, wherein the internal gear is reduced when the rotational speed of the internal gear is decelerating and is lower than near the opening rotational speed of the second one-way clutch. A variable-speed motor-generator, which drives and controls a motor-generator so that the speed becomes a predetermined value or less. 10. The variable speed motor / generator according to claim 1, wherein the bearing of the internal gear is provided on the outer periphery of the carrier. 11. The variable speed motor / generator according to claim 1, wherein the first clutch is installed on the input / output shaft side with respect to the sun gear. 12. The variable speed motor / generator according to claim 1, wherein the second clutch is installed on the outer circumference of the input / output shaft.