CN218733813U - Electromechanical device for realizing power inversion based on multi-rotor generator - Google Patents

Abstract

The utility model relates to an electromechanical device for realizing power inversion based on a multi-rotor generator, which comprises a multi-rotor generator, a one-way bearing, a motor and a power modulator; the generator and the motor are rotary; the multi-rotor generator comprises at least two rotors, preferably disc generators; the rotating shaft of the multi-rotor generator rotor is mechanically fixedly connected with the rotating shaft of the motor rotor coaxially through a one-way bearing; the motor is controlled and driven by a power supply modulator, the power supply modulator comprises a switching circuit and a logic module, and a control program is stored in the logic module; the power end of the motor is connected with a direct current power supply or is connected with the direct current power supply through a power supply modulator; the direct current power supply comprises a photovoltaic device, a primary battery or a secondary battery; the utility model discloses preferred pulse digital current control driven motor and set up flywheel, fairing, power contravariant wave form is good, and electric energy conversion efficiency is high.

Description

Electromechanical device for realizing power inversion based on multi-rotor generator

Technical Field

The utility model relates to a power contravariant's design field, concretely relates to electromechanical device based on multi-rotor generator realizes power contravariant.

Background

The power inverter has the use function of converting direct current into alternating current, is commonly called DC-AC in the industry, is widely applied to photovoltaic power generation and energy storage grid connection, and is manufactured by adopting a high-frequency electronic switching circuit in the conventional technology.

Aiming at the practical defects of the electronic inverter, many technicians begin to try and apply the historical technical old circuit, namely, the direct current motor or the additional flywheel is adopted to directly drive the generator to rotate to generate alternating current, the electric energy conversion efficiency is not low due to the technical direction, and by benefiting from the improvement of the permanent magnet material and the digital control technology and the technical maturity of the special motor of the rotor unmanned aerial vehicle, the technical old circuit which is based on the digital control technology and the special motor is more suitable for being applied to the load with rotational inertia, people naturally try to return to drive the generator to rotate and forward the alternating current is intended to be used in the field of the power inverter; the power supply inversion technology is fully paid attention to the old circuit, especially benefits from the technical progress of the rotary motor directly driven by digital current in recent years, has discontinuous power supply, large torque and small magnetic damping, is more favorable for exerting inertia when a load is a rotary body, and saves driving electric energy.

The electromechanical inverter has the greatest advantage that the output waveform is a sine wave, and the technical advantage is better when the power is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at remedying the inherent defect that current electronic inverter is limited by power components and parts, providing one kind and consuming DC power supply and linkage multi-rotor generator sends sine wave alternating current, realizes the electromechanical device of high efficiency power contravariant through the motor, electric energy conversion efficiency is high.

In order to achieve the technical object, the utility model provides an electromechanical device for realizing power inversion based on a multi-rotor generator, which comprises a multi-rotor generator, a one-way bearing, a motor and a power modulator; the generator and the motor are rotary; the multi-rotor generator comprises at least two rotors; the rotating shaft of the multi-rotor generator rotor is mechanically fixedly connected with the rotating shaft of the motor rotor coaxially through a one-way bearing; the motor is controlled and driven by the power supply modulator, and the power end of the motor is connected with or connected with a direct-current power supply through the power supply modulator; the direct current power supply comprises a photovoltaic device, a primary battery or a secondary battery.

The utility model relates to a multi-rotor generator which is a specially designed generator and is characterized in that a generator system is provided with at least two rotors; the primary battery is such as a zinc-air battery and an aluminum-air battery, and the secondary battery is such as a lithium battery, a zinc-nickel battery and a lead-acid battery, and the energy storage device of the series-parallel combination thereof; the basic function of the power modulator is to control the speed of the motor, including converting dc power into pulsed current.

In the technical scheme, the multi-rotor generator is a disc generator and comprises n stators and 2n or n +1 rotors, wherein n is a positive integer more than or equal to 1; the stator and the rotor are in a plane disc structure and are axially and alternately arranged; the stator comprises a stator core and a plurality of stator windings, and the stator core is fixed on the seat frame; the rotor comprises a magnet yoke and a plurality of permanent magnets, and a rotating shaft of the rotor is fixed on the seat frame through a bearing. The disc type motor is a special motor with mature technology in recent years, comprises a motor and a generator, and has a relatively compact structure and high conversion efficiency between mechanical energy and electric energy; the conventional structure has one stator and two rotors, and the disk generator is not limited to the one stator and two rotors structure.

The technical scheme comprises the steps of arranging a flywheel; the flywheel is an annular large-mass turntable made of solid forming materials, and an inner ring of the flywheel is arranged at a rotating shaft part between the multi-rotor generator and the one-way bearing in a mechanical fixing mode. The multi-rotor generator is usually applied by matching with a rotating shaft and additionally arranging a flywheel, so that the inertia momentum of the flywheel can be fully utilized, and the large mass is relative to the rotor of the motor, and the technology preferably can further exert the specific technical advantages of the multi-rotor generator; the larger the mass of the flywheel, the more advantageous the moment of inertia is, but it must be assumed that the motor drives the flywheel efficiently.

In the technical scheme, the motor is driven by pulse digital current; the power supply end of the motor is connected with a direct current power supply through the power supply modulator. The driving characteristics of the rotating motor are discontinuous pulse digital current, magnetic damping is small, and larger torque can be obtained by consuming the same direct current; commercial digitally controlled motors are usually provided with a dedicated power modulator (also called controller), which may be regarded as a component part or even all of the power modulator of the present invention.

In the above technical solution, the power modulator includes a switching circuit and a logic module; the logic module stores control program, and its control end is connected with switch circuit; the output end of the switch circuit is electrically connected with the power end of the motor, and the input end of the switch circuit is electrically connected with the direct current power supply. The design preferably uses the control of the logic module in the power modulator to the switching circuit, so that the electromechanical device further saves direct current power.

In the above technical solution, the signal input terminal of the logic module is connected to the power output terminal of the multi-rotor generator through a peripheral circuit, or is connected to an electrical signal device for monitoring the rotation speed of the flywheel. The design preferably utilizes monitoring of the generator power output or flywheel speed to enable the motor to operate in a power-saving mode through programmed control of the logic module.

The electromechanical device further comprises a rectifying circuit; the control end of the rectification circuit is electrically connected with the logic module, the input end of the rectification circuit is electrically connected with the power output end of the multi-rotor generator, and the output end of the rectification circuit is electrically connected with the secondary battery. The design preferably matches the stored energy of a secondary battery, temporarily stores the real-time surplus electric energy of the generator through the logic program control of a logic module, and ensures that the alternating current output of the electromechanical device is more stable.

The utility model is characterized in that the motor drives the multi-rotor generator to rotate under the control of the power modulator to obtain sine wave alternating current, and the linked flywheel has considerable rotational inertia, so that the motor can be controlled to discontinuously consume direct current within a certain time interval, and the motor comprises a motor driven by pulse digital current; the technical significance of the motor rotor driving the multi-rotor generator through the one-way bearing is that the one-way bearing can fully play the function of overrunning clutch under the condition that the motor is controlled by the power supply modulator to be intermittently powered off, so that the rotor of the generator can be operated in a linkage manner to generate electricity under the action of the rotational inertia of the large-mass flywheel, and the direct current consumption is saved; in other words, the utility model discloses the higher technical reason of power contravariant efficiency lies in the combination application of one-way bearing and power modulator.

The power supply modulator of the utility model can monitor the working condition of the generator through a peripheral circuit or an electric signal device for monitoring the rotating speed of the flywheel and control the motor to operate in an energy-saving way; the electromechanical device is further provided with a rectifying device, so that real-time surplus electric energy of the multi-rotor generator can be stored in a secondary battery, and the utilization rate of the electric energy is improved; the mechanical frame member for mounting the electromechanical device can be made of any material and structure as long as effective support is realized.

The utility model has the advantages that: the combined action of the motor and the one-way bearing is controlled by the power supply modulator, so that the rotational inertia of the flywheel can be fully exerted, the multi-rotor generator can efficiently convert alternating current, the conversion efficiency of the special disc generator is higher, the alternating current waveform is good, and the multi-rotor generator is particularly suitable for manufacturing high-power electromechanical devices.

Drawings

Fig. 1 is a partial schematic view of a mechanical structure of an electromechanical device according to the present invention;

FIG. 2 is a partial schematic view of a mechanical arrangement for adding a flywheel;

FIG. 3 is a partial schematic view of a one-way bearing partially embedded in the flywheel of the motor;

fig. 4 is a partial structural schematic view of the special disc generator;

FIG. 5 is a partial schematic view of a stator in a disk generator;

FIG. 6 is a partial schematic view of a rotor in a disk generator;

FIG. 7 is a partial schematic view of the motor rotor mounted to the disc generator rotor by means of one-way bearings;

fig. 8 is a schematic diagram of an operational logic of the infrastructure and control relationship of the power modulator;

FIG. 9 is a logic diagram illustrating the operation of the peripheral circuitry to provide signals to the logic module;

fig. 10 is a schematic diagram of an operational logic control relationship including a rectifier circuit and a secondary battery.

The attached drawings are as follows:

1. generator stator 1a, stator core 1b, stator winding 2, motor rotor

3. Generator rotor 3a, magnetic yoke 3b, permanent magnet 4, one-way bearing

5. Rotating shaft 6, flywheel 7, bearing 8 and shaft center

9. Support 10, normal direction

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and examples.

Fig. 1 is a partial schematic view of a mechanical structure of an electromechanical device for realizing power inversion based on a multi-rotor generator, comprising a generator with two rotors 3, a one-way bearing 4, a motor and a power modulator; the rotating shafts of the two rotors 3 of the generator, the one-way bearing 4 and the rotating shaft of the motor rotor 2 are mechanically and fixedly connected with the same axle center 8 through an external rotating shaft 5 respectively; the example can link two rotors of the generator to rotate through a one-way bearing so long as an external direct current power supply drives the motor rotor to rotate under the control of a power supply modulator, and therefore alternating current is obtained at the stator winding of the generator.

The multi-rotor generator is a specially designed generator, and is usually applied by additionally arranging a flywheel on a rotating shaft, wherein the flywheel is an annular large-mass rotating disc made of solid forming materials such as metal and can fully utilize the inertia momentum of the flywheel; the design form of the multi-rotor generator can be various, for example, the multi-rotor generator is designed into a split combination form that the rotating shafts of a plurality of generators are mechanically and coaxially fixedly connected, and the flywheel is attached to the rotating shaft which is mechanically and coaxially fixedly connected; a multi-rotor generator can also be integrally designed, and a flywheel for improving the inertia momentum of the rotor is designed inside the seat frame; in the multi-rotor generator, there is a disk generator, the inertia momentum of the rotor of the disk generator is usually large, when the inertia momentum of the rotor of the multi-rotor generator is to be further improved, a flywheel 6 may be additionally arranged at the position of the rotating shaft 5 between the multi-rotor generator and the one-way bearing 4, and fig. 2 is a partial schematic view of a mechanical structure in which the flywheel 6 is additionally arranged on the basis of the example of fig. 1.

The mounting of the one-way bearing 4 coaxially 8 with the motor rotor 2 or coaxially 8 with the flywheel 6 is not limited to the external passage through the rotating shaft 5, but includes embedding part or even all of the one-way bearing inside the motor rotor or flywheel, and a partial structure of which is partially embedded inside the motor rotor 2 is schematically shown in fig. 3.

The disc generator is a design type of multi-rotor generator, and although the technical development history is not long, the technical principle is familiar to those skilled in the art; it is clear to those skilled in the art that conventional motor products usually have only one rotor and one stator, but disc motors of conventional design usually have two rotors and one stator, and a partial structural schematic of a disc generator is shown in fig. 4.

The disc stator 1 and the disc rotor 3 of the example of fig. 4 are in a planar disc structure and are axially arranged alternately; the disc stator comprises a magnetizer stator core 1a and a plurality of stator windings 1b, the stator core is fixed on a seat frame, and the difference between the stator winding method and the conventional generator is as follows: the annular stator core is surrounded along the normal direction 10, and a partial structure of the annular stator core is schematically shown in FIG. 5; the disk rotor 3 includes a yoke 3a and a permanent magnet 3b, and its rotating shaft is fixed on a seat frame by a bearing 7, and a partial structure thereof is schematically shown in fig. 6, and the rotor 3 coaxially mounted on one side of the disk surface of the stator is similar in structure, and is characterized in that the magnetic polarities of the permanent magnets 3b are opposite.

The disk generator is not limited to design two rotors and one stator, and comprises n stators 1 and 2n or (n + 1) rotors 3, wherein n is a positive integer more than or equal to 1; for example, 2 rotors are provided inside the rotor structure to form a complete set of 1 stator, or (n + 1) rotors 3 and n stators are coaxially and alternately arranged. When the multi-rotor generator adopts a disc generator, a partial structure that the motor rotor is installed with the disc generator rotor through a one-way bearing is schematically shown in fig. 7.

The multi-rotor generator may have only one stator or a plurality of stators, and the combined electrical connection (single-phase or three-phase output) of each coil winding in the same stator is also familiar to those skilled in the art; the coil windings of the stators are combined to form a plurality of paths of alternating current outputs, and the paths of alternating current outputs can be electrically connected with an output power supply of the current collecting device or different alternating current loads respectively.

The pulse digital current driven motor is technically characterized in that: the power supply end of the motor is connected with a direct-current power supply through a power supply modulator, the power supply modulator provides alternating current which is not converted by a conventional electronic commutator but time sequence pulse current for a stator winding of the motor, so that the stator does not generate a rotating magnetic field but generates time sequence pulse electromagnetic poles, the rotor is driven to rotate under the action of a permanent magnet which is correspondingly distributed with the rotor, the direct-current electric energy-mechanical energy conversion efficiency is higher than that of the conventional direct-current motor, the torque is large, the magnetic damping is small, the rotary inertia effect of a load can be better exerted, and the rotary-wing unmanned aerial vehicle is generally applied to a rotary-wing unmanned aerial vehicle. Commercial digital control formula motor disposes the special controller usually, is a pulse intensity, the controllable controller of frequency, and the frequency is higher, and motor speed is faster, and concrete application can be regarded as power modulator's component part designs or integration separately with power modulator.

The flywheel can obviously increase the rotational inertia of the generator rotor, and when the flywheel reaches a certain rotating speed, even if the motor is powered off at intervals (at the moment, the one-way bearing 4 is automatically disconnected from the mechanical linkage relation with the generator rotor), the flywheel can also be linked with the rotor of the generator to rotate by inertia, so that the working condition of the generator cannot be obviously influenced by the power off at intervals of a certain time; the technical significance of the motor electrically connected with the direct current power supply through the power supply modulator lies in that the rotational inertia of the flywheel can be fully utilized, and the power supply logic control of the motor is applied to save the direct current power supply.

The one-way bearing plays a role of an overrunning clutch, is a special bearing well known to those skilled in the art, and is characterized in that a metal shell of the one-way bearing comprises a plurality of rolling shafts, rolling needles or rolling balls, and can only rotate in one direction, and a large resistance (locking) can be generated in the other direction, so the one-way bearing is called one-way; when the motor stops rotating under the control of the power modulator, the mechanical separation of the flywheel and the rotor of the motor is equivalent, so that the flywheel and the rotor of the motor are respectively arranged in two different inertia systems, and the rotational inertia effect of the flywheel can be fully exerted.

One logical schematic of the infrastructure and control relationships of the power modulator is shown in fig. 8, and includes a switching circuit and a logic module; the logic module is internally stored with a logic control program, and the control end of the logic control program is electrically connected with the switch circuit; the input end of the switch circuit is electrically connected with a direct current power supply, and the output end of the switch circuit is electrically connected with the power end of the motor.

One technique for setting the intermittent power-off control program of the motor by the logic module in an internal storage manner and executing the logic program by the logic module to require a control signal is preferably as shown in fig. 9, wherein a signal input end of the logic module is connected with a power supply output end of the generator through a peripheral circuit, and the logic module executes the control logic according to the programmed program by monitoring the working condition of the generator, such as real-time data of alternating current frequency, voltage or power and the like output by the generator in real time. The control signal can also be obtained by monitoring the rotating speed of the flywheel, for example, a magnet is arranged at the rim part of the flywheel and is periodically connected with a magnetoelectric coil at the signal input end of the logic module in an induction manner, so that the logic module obtains an electric signal of the real-time rotating speed of the flywheel, the working condition of the generator is indirectly known, and the direct-current power supply is optimally utilized through the programming control of the logic module.

The rectifying circuit can be regarded as a component of the power supply modulator, is separately designed or integrated with the power supply modulator, and preferably is matched with a secondary battery for energy storage; the load working condition of the electromechanical device is not absolutely constant, power consumption fluctuation exists, electric energy fluctuation also exists when an external direct current power supply adopts a photovoltaic device, real-time surplus electric energy of the generator can be temporarily stored through logic control of the logic module, and alternating current output is more stable. The operational logic control relationship of the rectification circuit and the secondary battery is shown schematically in fig. 10.

The following preferred examples are merely recommended, and several technical solutions may be partially used, or may be combined and used with other mature technologies.

Examples 1,

Design one the electromechanical device based on many rotors generator realize power contravariant, many rotors generator, one-way bearing 4, motor and power modulator including a disk structure.

The disc generator comprises a stator 1 and two rotors 3, wherein the stator comprises a stator core 1a and a plurality of stator windings 1b, the stator core is of an annular disc-shaped structure made of silicon steel sheet materials, a plurality of wire embedding grooves are designed along a normal direction 10, the plurality of stator windings 1b are connected in series in a surrounding mode and in an electric mode along the wire embedding grooves, and the structural schematic diagram is shown in fig. 5; the rotor 3 comprises a magnetic yoke 3a and a plurality of permanent magnets 3b, wherein the structure of one rotor is schematically shown in fig. 6, and the magnetic yoke 3a and the permanent magnets 3b of the other rotor 3 are similar in structure, but the magnetic polarities of the permanent magnets are opposite.

The stator 1 and the rotor 3 of the disc generator are of a planar disc structure, the stator 1 and the rotor 3 are axially and alternately arranged during installation, the two rotors 3 are respectively positioned on two sides of the disc surface of the stator 1, the structural schematic is shown in fig. 6, wherein a stator core 1a is fixed on a seat frame, and the rotor 3 is fixed on the seat frame through a bearing 7.

The generator and the motor are rotary, the motor is controlled and driven by pulse digital current, when the generator and the motor are installed, the fixed end part of the one-way bearing 4 is embedded into the motor rotor 2, and the rotating end of the one-way bearing is mechanically and fixedly connected with the rotating shaft of the motor rotor 2 through an external rotating shaft 5 and the same axle center 8. After the mechanical part is installed, the power supply end of the motor 1 is connected with a direct current power supply in the form of a photovoltaic device through a power supply modulator.

The basic structure and logic control relationship of the power supply modulator are shown in fig. 8, and when a commercial digital control type rotary motor system is adopted, the switch circuit shown in fig. 8 is replaced by a special controller; when the power supply modulator controls the driving motor to rotate, the generator is linked to rotate through the one-way bearing 4, the DC-AC power supply inversion is realized, and the output power and the frequency of the alternating current are determined by the torque and the rotating speed of the generator and the design power of the generator.

In the embodiment, the motor driven by pulse digital current control is selected, so that the conversion efficiency of direct current electric energy and mechanical energy is high; meanwhile, a disc type generator with high mechanical energy-alternating current energy conversion efficiency is selected, a photovoltaic direct current power supply is consumed by the motor, sine wave alternating current is obtained in the generator, power inversion with low electric energy conversion efficiency is achieved, and the disc type generator is different from a power supply electromechanical device manufactured by a high-frequency electronic circuit. When the direct current power supply is replaced by a secondary battery pack with relatively stable voltage (the secondary battery pack is generally called an energy storage battery when the capacity of the secondary battery pack is large enough), the power supply modulator can also play the role of intelligently utilizing the direct current power supply, and the logic control program for controlling the switch circuit to be powered on and intermittently powered off is set through the internal storage of the logic module, so that the intermittent power-off time can be determined according to the requirements of working conditions; when the power supply modulator controls the motor to be powered off intermittently, the one-way bearing with the overrunning clutch function is equivalent to mechanically separating the rotors of the motor, so that the two rotors in the disc type generator maintain the set working condition under the action of rotational inertia.

Examples 2,

The logic control program of embodiment 1 can be stored and set in the logic module, and this embodiment is changed to set the real-time control of the inverter power, and the logic structure of the power supply modulator and the control relationship thereof are shown in fig. 9.

A logic module in the power supply modulator is internally stored with a dynamic logic control program, when the logic module monitors that the disc type generator reaches a set working condition through a peripheral circuit, the switching circuit is controlled to be powered off at intervals, and inertia rotation is maintained by utilizing the rotational inertia of two rotors in the disc type generator; when the power output of the disc generator is monitored to be reduced to a set working condition lower limit (such as an output voltage lower limit), the switching circuit is controlled to be powered on to restart the motor to rotate, so that the disc generator is maintained in a set working condition range.

The rest of the mechanical structure of the embodiment is similar to that of the embodiment 1, which is more beneficial to saving direct current power supply; the pulse digital current controls the photovoltaic direct-current power supply which is discontinuously consumed by the driven motor, so that the same photovoltaic direct-current power supply is favorable for electrically connecting a plurality of electromechanical devices of the embodiment, and the design goal of fully utilizing the photovoltaic direct-current power supply is achieved.

Examples 3,

The disk generator in the embodiment 1 is replaced by a multi-rotor generator in a split combination form, the combination form is that rotating shafts of two generator rotors 3 are mechanically and coaxially connected, namely, the generator subsystem has the structural characteristics of two rotors 3; in addition, a flywheel 6 is additionally arranged, the flywheel is an annular large-mass rotary disc made of solid forming materials such as alloy, the mass of the flywheel 6 is larger than that of the two rotors 3, and an inner ring of the flywheel is sleeved on the rotating shaft 5 between the generator with the two rotors 3 and the one-way bearing 4.

The mechanical structure of the present embodiment is partially illustrated as fig. 3, the multi-rotor generator with two combined generator rotors 3 can fully utilize the inertia momentum of the flywheel, when the power supply modulator controls the motor to be intermittently powered off, the one-way bearing 4 with the overrunning clutch function is equivalent to mechanically separating the rotors of the motor, so that the two rotors 3 of the generator maintain the inertial rotation at a certain time interval under the action of the rotational inertia of the flywheel 6.

In the embodiment, the flywheel with larger inertia mass is installed, so that the rotational inertia of the two rotors 3 of the generator can be increased, and a better power supply inversion effect can be achieved through the control of the power supply controller.

Examples 4,

A rectification circuit is arranged on the basis of the embodiment 3, and a secondary battery pack of a zinc-nickel battery is configured; the control end of the rectifying circuit is electrically connected with a logic module of the power modulator, the power input end of the rectifying circuit is electrically connected with the power output end of the generator, and the power output end of the rectifying circuit is electrically connected with the secondary battery pack; the switching circuit of the power supply modulator is provided with two paths of inputs which are respectively and electrically connected with the secondary battery and the real-time direct current power supply of the external photovoltaic device. The operation logic structure and control relationship of the secondary battery pack provided with the rectifier circuit of the present embodiment are shown in fig. 10.

The embodiment utilizes the secondary battery pack as energy storage, and the real-time surplus electric energy of the generator is temporarily stored in the secondary battery pack through the control program of the logic module, so that the fluctuation influence of the real-time fluctuation of the photovoltaic direct-current power supply on the inversion of the power supply is effectively overcome, and the alternating current output of the electromechanical device of the embodiment is more stable.

Claims (6)

1. An electromechanical device for realizing power inversion based on a multi-rotor generator is characterized by comprising the multi-rotor generator, a one-way bearing (4), a motor and a power supply modulator; the generator and the motor are rotary; the multi-rotor generator comprises at least two rotors (3); the rotating shaft of the multi-rotor generator rotor (3) is mechanically and fixedly connected with the rotating shaft of the motor rotor (2) and the same axle center (8) through a one-way bearing (4); the motor is controlled and driven by the power supply modulator, and the power end of the motor is connected with or connected with a direct-current power supply through the power supply modulator; the power supply modulator comprises a switching circuit and a logic module; the logic module is internally stored with a control program, and the control end of the logic module is connected with the switch circuit; the output end of the switch circuit is electrically connected with the power end of the motor, and the input end of the switch circuit is electrically connected with the direct-current power supply; the direct current power supply comprises a photovoltaic device, a primary battery or a secondary battery.

2. Electromechanical device according to claim 1, characterised in that said multiple rotor generator is a disc generator comprising n stators (1), 2n or n +1 rotors (3), n being a positive integer > 1; the stator (1) and the rotor (3) are in a plane disc structure and are axially and alternately arranged; the stator (1) comprises a stator core (1 a) and a plurality of stator windings (1 b), and the stator core (1 a) is fixed on the seat frame; the rotor (3) comprises a magnet yoke (3 a) and a plurality of permanent magnets (3 b), and a rotating shaft of the rotor (3) is fixed on the seat frame through a bearing (7).

3. The electromechanical device according to claim 1, characterised by comprising providing a flywheel (6); the flywheel (6) is an annular large-mass turntable made of solid forming materials, and an inner ring of the flywheel is arranged at the position of a rotating shaft (5) between the multi-rotor generator and the one-way bearing (4) in a mechanical fixing mode.

4. The electromechanical device according to claim 1, wherein said motor is a pulsed digital current drive; the power supply end of the motor is connected with a direct current power supply through a power supply modulator.

5. The electromechanical device according to claim 1 or 3, characterised in that the signal input of said logic module is connected, through a peripheral circuit, to the power output of a multiple rotor generator or to an electrical signal device for monitoring the speed of the flywheel (6).

6. The electromechanical device of claim 1, comprising a rectifier circuit; the control end of the rectification circuit is electrically connected with the logic module, the input end of the rectification circuit is electrically connected with the power output end of the multi-rotor generator, and the output end of the rectification circuit is electrically connected with the secondary battery.

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