JPH0145308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power device applied to devices that repeatedly accelerate and brake, such as electric vehicles and machine tools.

For example, in conventional power systems for electric vehicles, the stator is fixedly supported and the rotor is connected to the output shaft in order to store surplus power during braking and use that power effectively during acceleration. a first generator/motor; a second generator/motor having a stator and a rotor rotatably supported and the rotor being connected to the output shaft; and a second generator/motor connected to the stator of the second generator/motor. Some motors include a flywheel and a battery that supplies a driving voltage to the first and second generator/motors or receives a charging voltage. In this conventional power unit, the rotors of the first and second generator/electric motors are both connected to the output shaft, and the rotational direction of the flywheel is restricted to one direction, so the controllable range is narrow and there is no selection. The operating modes available were also limited.

It is an object of the present invention to solve the above-mentioned drawbacks of the conventional device, to maintain the rotational direction of the output shaft constant regardless of the rotational direction of the flywheel, and to provide a power source capable of selecting various operation modes. We are in the process of providing equipment.

In order to achieve the above object, the power plant of the present invention includes one-way clutches connected in different directions between the rotor of the first generator/motor and the rotor (or stator) of the second generator/motor. Transmission mechanisms are installed in parallel. That is, the power plant of the present invention includes a first generator/motor having a stator fixedly supported and a rotor connected to an output shaft, and a second generator/motor having a stator and rotor rotatably supported. , a flywheel connected to either the stator or the rotor of the second generator/motor, each of which includes a speed reducer and a unidirectional clutch; The rotor is installed in parallel between the rotor of the other rotor that is not connected to the flywheel and the first generator/motor, and one rotates in the rotation direction of the second generator/motor only when the rotation direction of the second generator/motor is the first direction. first and second transmission mechanisms that transmit data as they are, and the other that transmits data by reversing the direction of rotation only when the second direction of rotation of the second generator/motor is in the second direction; In addition to supplying driving voltage to the generator-cum-motor,
a battery charged with a voltage generated by the first and second generator-cum-motor;
and a control means for switching and controlling the generator-cum-motor as either a generator or an electric motor.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

FIG. 1 is a configuration diagram of a power plant showing an embodiment of the present invention. In the figure, reference numeral 1 denotes a first generator/electric motor, which is composed of a rotor 2 and a stator 3, and the rotor 2 is mechanically connected to a tire 5 via an output shaft 4. Although only the output shaft 4 is shown here, an appropriate speed reducer is actually provided. The stator 3 is fixedly supported.

Reference numeral 6 denotes a second generator/electric motor, which is composed of a rotor 7 and a stator 8, which are rotatably supported. Stator 8 is connected to flywheel 9. Also, the rotor 2 of the first generator/motor 1 and the rotor 7 of the second generator/motor 6
Two transmission mechanism sections 10 and 11 are arranged in parallel between them.

The transmission mechanism section 10 includes gears 12, 13, 14, a unidirectional clutch 15, and a gear 16, and the transmission mechanism section 11 includes a gear 12, a unidirectional clutch 17, and a gear 1.
8 and a gear 16. The one-way clutches 15 and 17 are connected when the connecting shaft rotates in a certain direction and transmit power;
The one-way clutch itself is well known in that it is not connected and does not transmit power when rotating in other directions. Furthermore, the one-way clutches 15 and 17 are arranged in opposite directions, so that if one is connected, the other is not.

Note that 19 is a battery, and the control circuit 20,
It is electrically connected to the stator 3 and rotor 2 of the first generator/motor 1 and the rotor 7 and stator 8 of the second generator/motor 6 via terminals 21, 22, and 23, respectively. Accordingly, from the battery 19 to the first and second generator/electric motor 1
A driving power is supplied to the battery 19 and 6, or a charging voltage is applied to the battery 19 and stored therein.

Next, the operation of the embodiment power plant configured as described above will be explained by taking a typical mode as an example.

First, considering the case where the flywheel 9 is stopped or the vehicle is accelerated from a low speed state, the first and second generator-cum-electric motors 1 and 6
Both operate as electric motors, and the electric power supplied from the battery 19 rotates the electric motor 1 and accelerates the output shaft 4, while the electric power supplied from the battery 19 rotates the electric motor 6 and accelerates the flywheel 9. Further, when the gear 12 rotates in the A direction due to the rotation of the rotor 7, the gear 13 rotates in the B direction opposite to the A direction.
If the gear 14 rotates in the A direction and the one-way clutch 15 is connected by the rotation of the gear 14 in the A direction, the gear 16 also rotates in the A direction and the rotor 2 rotates in the A direction.
Encourage rotation in the direction. In this case, since the gear 12 is rotating in the A direction, the one-way clutch 17
are not concatenated. The flow of power in this state is
It is shown in Figure a.

Next, considering acceleration when the flywheel is at high speed, the second generator/motor 6 is operated as a generator. That is, the stator 8 is rotated by the flywheel 9 to generate electricity, and the induced voltage is supplied to the electric motor 3 through the battery 19, and at the same time, the direction of rotation of the rotor 7 is reversed to be in direction B due to the rotation of the stator 8. Therefore gear 1
The rotation direction of the gear 2 is B, the gear 13A and the gear 14 are B, and the one-way clutch 15 is not connected. However, the one-way clutch 17 is connected because the gear 12 rotates in the B direction, and the gear 18 rotates in the B direction, and the gear 1
6 is rotation in the A direction, and the rotation direction of the rotor 2, that is, the rotation direction of the output shaft 4 does not change and is accelerated.
The flow of power in this case is shown in FIG. 2b.

In addition to the above, when braking is performed by decelerating the output shaft 4, the first generator/motor 1 is operated as a generator, the second generator/motor 6 is operated as an electric motor, and the output shaft 4 is simultaneously generated. Applying braking and further applying current generated by power generation to the electric motor 6,
The flywheel 9 is rotated to store surplus power generated by deceleration. The flow of power in this case is shown in FIG. 2C.

Similarly, during deceleration, when the first generator/motor 1 is operated as a generator and the second generator/motor 6 is not operated as either a generator or an electric motor, as shown in FIG. 2d. The voltage generated by the generator 1 is charged into the battery 19.

In addition, when the second generator/motor 6 is operated as a motor at the time of stopping, and the first generator/motor 1 is not operated as a generator or an electric motor, as shown in FIG. 2e, The battery 19 is charged with the voltage generated by the generator 6 due to the rotation of the flywheel 9.

As described above, according to the power device of the present invention,
Since a transmission mechanism including one-way clutches with different connection directions is installed between the rotor of the first generator/motor and the rotor (or stator) of the second generator/motor, the rotational direction of the flywheel is Since the torque for rotating the output shaft in a fixed direction can be extracted regardless of the output shaft, various operation modes can be selected. Furthermore, even if the flywheel is not rotating, the vehicle can be accelerated by increasing the speed of the flywheel, and at the end of acceleration, energy from the flywheel can be absorbed to continue accelerating the vehicle.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a power plant showing an embodiment of the present invention, and FIGS. 2a, b, c, d, and e are diagrams showing power flow states in various operating states. 1, 6... Generator/electric motor, 2, 7... Rotor, 3, 8... Stator, 4... Output shaft, 9...
Flywheel, 10, 11...Transmission mechanism, 1
2, 13, 14, 16, 18... Gear, 15, 1
7...One-way clutch, 19...Battery, 2
0, 21, 22, 23...control circuit.

Claims (1)

[Claims] 1. A first generator/motor whose stator is fixedly supported and whose rotor is connected to an output shaft, a second generator/motor whose stator and rotor are rotatably supported, and this second generator/motor. a flywheel connected to either the stator or the rotor of the second generator-motor, each of which includes a speed reducer and a unidirectional clutch; one is installed in parallel between the rotor of the other not connected and the first generator-cum-motor, and one is connected to the second
When the direction of rotation of the generator/motor is in the first direction, the direction is transmitted as is, and the direction is reversed only when the rotation direction of the second generator/motor is in the second direction. a driving voltage is supplied to the first and second transmission mechanisms, and the first and second generator/motors are charged with the voltage generated by the first and second generator/motors. A power plant comprising: a battery; and a control means for switching and controlling the first and second generator/electric motors as a generator or as an electric motor.