Electric motor that can simultaneously drive and generate electricity

Abstract

To solve a problem in which a basic characteristic of an electric motor is that the motor cannot drive and generate electricity at the same time by themselves, and when the motor is to do so simultaneously, the motor needs to be equipped with a separate motor for drive and generation. However, this is not very effective and has hindered the practical use, and furthermore, there are no other ways to use an electric motor to conserve electricity other than for regenerative energy, such that the inherent power-saving capability of electric motor is not being fully utilized.SOLUTION: A core coil inside an electric motor is divided into multiple groups, and these groups are controlled as needed to be used for either motoring or power generation, thereby generating electricity using already used regenerative energy and unused areas, thereby promoting improved power savings.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an electric motor that is capable of simultaneously generating power and producing power by itself. [Background technology]

[0002] Electric motors often produce maximum output when starting up or accelerating, but there are few other opportunities to produce maximum output. There are proposals for power-saving measures that create regenerative energy when decelerating or braking, or that connect multiple electric motors in series, or that alternate between power generation and electricity generation. [Prior art documents]

[0003] Incidentally, Patent Document 1 proposes the use of regenerative energy by making the most of the characteristics of a single electric motor, and Patent Document 2 proposes a power saving measure that utilizes repulsive force. [Patent documents]

[0004] [Patent Document 1] JP2008-44409A [Patent Document 2] Patent Publication No. 2022-54563 Summary of the Invention [Problem to be solved by the invention]

[0005] The maximum output of an electric motor is often used during startup and acceleration, but as a power saving measure during stable operation when the load fluctuation width is small, there are devices that alternate between power generation and driving by themselves, but the effect is small.

[0006] In order to solve the above problems, the present invention provides power saving for an electric motor by configuring wiring inside the electric motor as described below. (1) This electric motor is characterized by dividing the cored coil, which is a wound coil around the iron core inside the motor, into multiple groups. In order to bring out the inherent capabilities of the motor, the number of groups of cored coils is controlled to be used for power generation or power generation, or to drive and generate power simultaneously, in response to changes in the load torque as needed. Any power exceeding that consumed is stored, and if there is a shortage, it is returned from the storage battery, thereby realizing power savings. (2) An electric motor characterized in that a repulsive force device for suppressing the resistance of gravitational force as described in the cited document 2 is combined with the electric motor to maintain the advantages of a coreless motor while compensating for its disadvantages, expanding the scope of use to low-potential energy sources such as human power and small and medium-sized rivers, and enhancing the effect of power saving.

[0007] The electric motor of the present invention provides power generation and driving force simultaneously by itself, and proposes power saving by utilizing unused energy. [Brief description of the drawings]

[0008] [Figure 1] This is a schematic cross-sectional elevation view of a typical inner rotor type electric motor. [Diagram 2] Figure 1 shows a cross-sectional elevation view of the repulsion device. [Diagram 3] This is an exploded view of the stator of the inner rotor motor in Figure 1. [Figure 4] This is an exploded view of the stator of an axial motor. [Diagram 5] This diagram shows the changes in load on an electric motor and the utilized and unused areas. [Figure 6] This is a simplified comparison table of the present invention and comparative examples. [Figure 7] This diagram shows the changes in the number of generators and motors at each point. [Figure 8] This is an exploded view of the motor in Figure 3 with a repulsion device added to the stator. [Figure 9] This is an exploded view of the stator in Figure 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] Figure 1 is a schematic elevational cross-sectional view of a typical inner rotor type electric motor; permanent magnets 5 placed on a disk-shaped rotor 4 are rotated on rotating shaft 1 via bearings 2, and magnetic field lines are applied to cored coil 6 in stator 3 to generate motive power, generate electricity, or obtain motive power and electricity simultaneously. Figure 2 shows an example of the inner rotor type in Figure 1 with a repulsive magnet 7 added, with the same poles of the magnets 7 on stator 3 and magnets 7 on rotor 3 facing each other to create a repulsive force.

[0011] Figure 3 is a schematic exploded diagram of the stator of an inner rotor type electric motor, with simplified wiring 9 drawn and three cored coils 6a arranged with consideration for balance as one group, and three other groups b, c, d assembled in the same way as a, making a total of four groups controlled by external terminals 8 to provide power or generate electricity, or to provide power and generate electricity simultaneously by itself. Figure 4 is a schematic exploded diagram of the stator of an electric motor that functions in the same way as Figure 3, with the cored coils of an axial type electric motor divided into three groups e, f, g with consideration for balance.

[0012] The curve diagram in Figure 5 is a diagram that shows the behavior of a car, bicycle, etc. over time, and is a simplified representation of the motor's workload in response to load fluctuations. It is a schematic diagram that shows the maximum output being 10p in the initial section A, then decelerating to 3.7p in section B, then to 5.0p and operating normally, and finally stopping in the final section C. The diagram shows the energy utilization area in the lower wavy I-shaped area that is normally used, and the unused area at the top that is used by this invention, with wavy diagonal lines. The short lines at different intervals on the operating time axis expand time in sections A and C, and shorten it in section B, confirming that the flow of time is not uniform; x, y, and z will be explained in Figure 6.

[0013] FIG. 6 is based on the comparative example in Reference 1 in FIG. 5, and shows the approximate momentum of an electric bicycle, etc., by connecting the change points of speed with straight lines, and expressing the change in output due to the load torque in a time series.

[0014] The cored coils are divided into four groups, and the required power at point x is between 5.0p and 7.5p, so three-quarters of the cored coil groups, or three groups, are used for power generation, and the remaining quarter is used for power generation. At point y, 5.0p, half of the maximum output of 10p, is supplied by two groups of cored coils, and the remaining two groups are used for power generation. The torque at point z is 2.5p, so one quarter of the cored coil groups is used for power generation, and the remaining three groups are used for power generation. Finally, here is a table summing up the estimated momentum for each change point.

[0015] For the above reasons, the comparative example in cited document 1 has a total of ±0 points for each point, whereas the present invention has a total of +35 points. Furthermore, compared to the regenerative energy in section C, which usually occurs in an instant, and the conventional system in which power and electricity are alternately generated, the present invention, which simultaneously generates power and electricity in section B, which has a longer operating time, has a greater power saving effect.

[0017] Figure 7 is a comparative example of Figure 6, showing a situation where the number of cored coil groups changes use as the torque changes. In a device with 4 groups, when maximum torque is required in section A, all 4 groups are used for power generation, at point x, 3 groups are used for power generation and the remaining 2 groups are used for power generation, at point y, 2 groups are used for power generation and the remaining 2 groups are used for power generation, at point z, 1 group is used for power generation and the remaining 3 groups are used for power generation, and in section C, all are used for power generation to create regenerative energy. Each group is represented by a circle, and the column with 3 groups is an example for reference.

[0018] FIG. 8 is an exploded view of a stator incorporating the repulsive magnet of Patent Document 2 into the schematic diagram of the inner rotor type electric motor of FIG. 1 and FIG. 3. This retains the advantages of a coreless motor, which has no iron core and no resistance to attractive forces, while complementing its disadvantages and allowing it to be used in areas where coreless motors are weak, and is preferable in that it reduces dependency on external power and improves efficiency by reviewing the use of human power and small and medium-sized river energy, which have low potential and little utility value. Explanation of symbols

[0019] 1 … Rotation axis 2 … Bearings 3 … Stator 4 … Rotor 5... Permanent magnet 6 … Core coil 6a...Core coil 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j ... Core coil 7 … Repulsion magnet 8 … Terminal 9 … Wiring route

Claims

1. This electric motor uses permanent magnets and is characterized in that it takes into consideration the balance of the cored coils, controls the external terminals which divide the cored coils into multiple groups, and performs power and electricity generation simultaneously or separately.

2. The electric motor is characterized in that a repulsive device that suppresses the resistance of attractive force is combined with the electric motor, thereby maintaining the advantages of a coreless motor while compensating for its disadvantages, and allowing the electric motor to be used in areas where coreless motors are not good at.

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