Motor-driven generator

Abstract

A generator driven by a motor comprises a casing, a stator core, rotor magnetic steel, a motor winding, a generator winding, an axial motor and a flywheel, the motor and the generator share the stator core and are wound with the motor winding and the generator winding respectively, the generator winding is larger than the motor winding, and the motor and the generator share the rotor magnetic steel. When the motor is driven, rotor magnetic steel is shared, a generator winding is cut at the same time, a generator generates induction current, the induction current is supplied to a direct-current bus through rectification, filtering and voltage stabilization, and an external power supply of the motor drive is switched to be supplied to the motor drive through the direct-current bus. At the moment, the motor and the generator enter an internal power supply circulation mode, and the direct current bus outputs rated current and voltage to the load.

Description

Technical Field

[0001] The present invention belongs to the technical fields of motors and generators, the conversion technology of electric energy and mechanical energy, renewable electric energy and new energy, and relates to a motor-driven generator. Background Art

[0002] The accompanying energy security issues and environmental pollution issues have always been the two most intractable bottleneck problems. Oil security, resource tension, and the harmful substances emitted from vehicle exhaust during driving damage the environment and human health.

[0003] . Existing power generation modes: hydropower generation, thermal power generation, geothermal power generation, nuclear power generation, solar power generation, biomass power generation, wind power generation, wave power generation, ocean current power generation, and tidal power generation. Due to resource depletion factors, manufacturing and operation cost cycles, air pollution, unstable and uncontrollable factors, the development of new energy technologies is affected.

[0004] The most notable issue with pure electric vehicles is that the range of 700 kilometers has been difficult to break through. The core lies in the power battery materials, and there has been no revolutionary breakthrough, making it difficult to solve the problems of vehicle performance, manufacturing cost, and use safety. For example, increasing the number of power batteries means an increase in the weight and volume of the vehicle, and it is difficult to break through the technology of increasing the range by improving the energy density of power batteries, which has become a bottleneck for the range of pure electric vehicles.

[0005] Currently, the representative related technologies regarding motor speed-increasing generators include the following: CN208656573U multi-stage flywheel starting transmission power generation device, CN201811338508 - self-circulating magnetic levitation flywheel energy storage generator, CN201510217219 - a star-shaped electromagnetic power generator, CN201610001301 - a circulating electric generator set, CN201710535206 - a counterweight flywheel with high rotational inertia driving a generator. CN 109256902A a high-speed permanent magnet motor with integrated stator and rotor circulation cooling and its cooling method, CN110165821A a new type of horizontal self-pumping vacuum chamber high-integration flywheel energy storage device. The technical drawback is that the energy density is insufficient and it cannot reach the actual industrial application value. Summary of the Invention

[0006] In view of the above problems, when the motor is driving, the common rotor magnet cuts the generator winding simultaneously, and the generator generates an induced current, which is rectified, filtered, and regulated to supply power to the DC bus. The external power supply for the motor drive is switched to supply power to the motor drive from the DC bus. At this time, the motor and the generator enter the internal power supply circulation mode, and the DC bus outputs a rated current and voltage to the load, realizing the circulation, conversion, and regeneration of electric energy.

[0007] The technical solution of the present invention is realized as follows.

[0008] In one of the embodiments, a motor-driven generator includes a housing, a stator core, a rotor magnet, a motor winding, a generator winding, an axial motor and a flywheel. The motor and the generator share a stator core and are respectively wound with motor windings and generator windings. The generator winding is larger than the motor winding. The motor and the generator share a rotor magnet. When the motor is driven, the shared rotor magnet simultaneously cuts the generator winding. The generator generates an induced current, which is rectified, filtered and stabilized to supply power to a DC bus. The external power supply driven by the motor is switched to supply power to the motor drive with power from the DC bus. At this time, the operation of the motor and the generator enters an internal power supply cycle mode, and the DC bus outputs rated current and voltage to the load.

[0009] In one embodiment, the rotor magnet is a permanent magnet multi-pole ring rotor, a surface protruding permanent magnet rotor, a surface embedded permanent magnet rotor and an internal permanent magnet rotor, wherein the rotor magnet is divided into an inner rotor magnet and an outer rotor magnet; the magnet is further divided into a rotor and a stator.

[0010] In one of the embodiments, the stator winding includes a centralized winding and a distributed winding, the distributed winding is divided into a concentric winding and a stacked winding, the concentric winding can be divided into a planar winding and a three-planar winding, the stacked winding is divided into a single-layer stacked winding and a double-layer stacked winding, wherein the stacked winding can be divided into a cross winding, a concentric cross winding and a single- and double-layer hybrid winding; secondly, the stator winding magnetic pole area is divided into a salient pole winding and a non-salient pole winding; the secondary winding connection method is a three-star connection method and a triangle connection method.

[0011] Furthermore, when the motor is driven, two phases of the three-phase motor are turned on instantaneously in turn, and one phase is a suspended phase. The suspended phase instantaneously and in turn derives the induced current, which is supplied to the DC bus through rectification, voltage stabilization, capacitor inductance filtering and voltage stabilization.

[0012] In one embodiment, the stator core is made of silicon steel, ferrite and amorphous magnetic conductive material, wherein the amorphous magnetic conductive material is an iron-based amorphous alloy; and the stator core is composed of an inner stator core and an outer stator core.

[0013] In one embodiment, the motor includes a DC motor and an AC motor according to the working power supply, and the motor includes a synchronous motor, an asynchronous motor, and a DC motor according to the structure.

[0014] Further, the motor is driven, and the frequency converter controls the motor drive.

[0015] In one embodiment, the generator includes a DC generator and an AC generator. The AC generator includes a synchronous generator and an asynchronous generator. The AC generator also includes a single-phase generator and a three-phase generator. Secondly, it also includes an equal-power generator, a doubly-fed generator, a self-excited generator, and an excited generator. Again, the rotor structure of the generator is an inner rotor and an outer rotor. Subsequently, the stator core winding structure of the generator is an inner stator core winding and an outer stator core winding.

[0016] . In one embodiment, the generator driven by an electric motor adds an axial electric motor drive to form axial suspension of the rotor, an electric motor drive to form radial suspension of the rotor, and the electric motor drive and the axial electric motor drive to form radial and axial suspension of the rotor of the generator driven by an electric motor.

[0017] In one embodiment, the generator driven by an electric motor is integral. Secondly, the generator driven by an electric motor is split-type, coaxially split into a two-machine arrangement. Again, the generator driven by an electric motor is multi-machine type, split into a multi-machine non-coaxial arrangement, and rotated by belt pulleys and sprockets. Subsequently, the total power of the generator is greater than the total power of the electric motor.

[0018] In one embodiment, the bearings of the generator driven by an electric motor are permanent magnet suspension bearings, electromagnetic suspension bearings, hybrid bearings of electromagnets and permanent magnets, air suspension bearings, oil suspension bearings, and ceramic bearings.

[0019] The beneficial effects of the present invention are as follows: (1) The generator driven by an electric motor has a simple structure, low production cost, and is conducive to promotion. (2) The generator driven by an electric motor realizes that part of the electric energy output by the generator is returned to the driving motor for power supply, and part of the electric energy is supplied to the load, and the electric energy is renewable.

[0020] Description of the drawings.

[0021] The present invention will be further described below in conjunction with the drawings and embodiments.

[0022] Figure 1 Exploded assembly perspective view of the generator driven by an electric motor.

[0023] Figure 2 Component perspective view of the generator driven by an electric motor.

[0024] In the figure: stator core 001; winding 002; generator three-star connector 003; motor three-star connector 004; generator lead 005; motor lead 006; magnet 007; magnet steel ring 008; flywheel 009; machine cover 010; bearing 011; shaft 012.

[0025] Detailed implementation manners.

[0026] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0027] Example 1.

[0028] In Specific Example 1, the motor-driven generator is assembled and driven.

[0029] For the motor-driven generator, the stator core 001 is shared. The stator core 001 is wound with a motor winding 002 and a generator winding 002. The generator winding is larger than the motor winding. The two sets of windings are respectively the generator three-star joint 003 and the motor three-star joint 004. The generator lead 005 and the motor lead 006 are led out from the port of the housing shaft 012. When the stator core 001 is wound with the winding 002; the magnet steel ring 008 is embedded with magnets 007 to form an outer rotor. The stator core 001 wound with the winding 002 is sleeved inside the magnet steel ring 008. The outer diameter of the outer rotor is sleeved with a flywheel 009. The machine cover 010 covers the upper and lower surfaces of the magnet steel ring 008 and the screws are tightened.

[0030] When driven by an external power supply of the motor, the motor winding 002 and the magnet 007 generate a thrust, and the motor rotates. The motor rotation shares the outer rotor magnet 007 to cut the generator winding, and the generator generates an induced current, which is rectified, filtered, and regulated to supply power to the DC bus. The external power supply driving the motor is switched to supply power to the motor drive with the DC bus power supply. At this time, the motor and the generator enter the internal power supply circulation mode, and the DC bus outputs the rated current and voltage to the load.

[0031] Example 2.

[0032] In Specific Example 2, the motor-driven generator is applied to a mobile phone power bank.

[0033] The power of the motor-driven generator of the mobile phone power bank is 100W, and there is one battery of 30000mAh. When the power of the power bank battery is detected to be lower than the predetermined value, the power bank battery supplies power to the motor in the motor-driven generator. The motor in the motor-driven generator drives the generator to generate electricity, which is rectified, filtered, and regulated to supply power to the DC bus. The battery power supply driving the motor is switched to supply power to the motor drive with the DC bus power supply. At this time, the motor and the generator enter the internal power supply circulation mode, and the DC bus supplies power to the mobile phone power bank battery at 2 - 5A and a voltage of 5 - 24V. When the power of the power bank battery is detected to be full of the predetermined value, the motor-driven generator stops operating, and the mobile phone power bank battery charges the mobile phone.

[0034] Example 3.

[0035] In Specific Example 3, the motor-driven generator is applied to an electric two-wheeler.

[0036] Install a generator driven by an electric motor on the bracket of the two-wheel electric vehicle. The power of the generator driven by the electric motor is 2000W, and the driving hub motor of the two-wheel electric vehicle is 500W. For the starting mode of the two-wheel electric vehicle, the starting battery supplies power to the electric motor in the generator driven by the electric motor. The electric motor in the generator driven by the electric motor drives the generator to generate electricity, which is rectified, filtered, and regulated to supply power to the DC bus. The external power supply of the electric motor is switched to supply power to the electric motor with the DC bus. At this time, the electric motor and the generator enter the internal power supply cycle mode. The DC bus outputs the rated current and voltage to the 500W driving hub motor of the two-wheel electric vehicle, and the two-wheel electric vehicle runs, realizing an infinite journey.

[0037] Embodiment 4.

[0038] In the specific Embodiment 4, the application of the generator driven by an electric motor in a pure electric vehicle.

[0039] Install a generator driven by an electric motor on the frame of the pure electric vehicle. The power of the generator driven by the electric motor is 500KW, and the voltage is 380V - 720V. The driving motor of the pure electric vehicle is 250KW. For the starting mode of the pure electric vehicle, the starting battery supplies power to the electric motor in the generator driven by the electric motor. The electric motor in the generator driven by the electric motor drives the generator to generate electricity, which is rectified, filtered, and regulated to supply power to the DC bus. The external power supply of the electric motor is switched to supply power to the electric motor with the DC bus. At this time, the electric motor and the generator enter the internal power supply cycle mode. The DC bus outputs the rated current and voltage to the 250KW driving motor of the pure electric vehicle, and the electric vehicle runs, realizing an infinite journey.

[0040] Many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes. All modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A motor-driven generator, characterized in that, It includes a housing, a stator core, a rotor magnet, a motor winding, a generator winding, an axial motor, and a flywheel. The motor and the generator share the stator core and are respectively wound with the motor winding and the generator winding, and the generator winding is larger than the motor winding. The motor and the generator share the rotor magnet. When the motor is driven, the shared rotor magnet cuts the generator winding at the same time, and the generator generates an induced current, which is rectified, filtered, and regulated to supply power to the DC bus. The external power supply for driving the motor is switched to supply power to the motor drive from the DC bus. At this time, the motor and the generator enter the internal power supply cycle mode, and the DC bus outputs rated current and voltage to the load.

2. The generator driven by an electric motor according to claim 1, characterized in that The rotor magnet is a permanent magnet multi-pole ring rotor, a surface protruding permanent magnet rotor, a surface embedded permanent magnet rotor, and an internal permanent magnet rotor. Among them, the rotor magnet is divided into an inner rotor magnet and an outer rotor magnet; the magnet is also divided into a rotor and a stator.

3. A motor-driven generator according to claim 1, characterized in that, The stator winding includes a concentrated winding and a distributed winding. The distributed winding is divided into a concentric winding and a stacked winding. The concentric winding can be further divided into a planar winding and a three-planar winding. The stacked winding is divided into a single-layer stacked winding and a double-layer stacked winding. Among them, the stacked winding can also be divided into a cross-type winding, a concentric cross-type winding, and a single-double layer hybrid winding; secondly, the stator winding pole region is divided into an obvious pole type winding and an implicit pole type winding; the wiring method of the winding is a three-star wiring method and a delta wiring method.

4. The generator driven by an electric motor according to claim 1, characterized in that The material of the stator core is silicon steel, ferrite, and amorphous magnetic conductive material. Among them, the amorphous magnetic conductive material is an iron-based amorphous alloy; secondly, the stator core is an inner stator core and an outer stator core.

5. A motor-driven generator according to claim 1, wherein, The motor includes a DC motor and an AC motor according to the working power supply. Secondly, the motor is a permanent magnet synchronous motor, an asynchronous motor, and a DC motor according to the structure.

6. A motor-driven generator according to claim 1, characterized in that, The generator includes a DC generator and an AC generator. The AC generator includes a permanent magnet synchronous generator and an asynchronous generator. The AC generator also includes a single-phase generator and a three-phase generator. Secondly, it also includes an equal-power generator, a doubly-fed generator, a self-excited generator, and an excited generator; again, the rotor structure of the generator is an inner rotor and an outer rotor; secondly, the stator core winding structure of the generator is an inner stator core winding and an outer stator core winding.

7. A motor-driven generator according to claim 1, characterized in that The generator driven by the motor adds an axial motor drive to form a rotor axial suspension, the motor drive forms a rotor radial suspension, and the motor drive and the axial motor drive form a rotor radial and axial suspension of the generator driven by the motor.

8. A generator driven by an electric motor according to claim 1, characterized in that, The generator driven by the motor is integrated. Secondly, the generator driven by the motor is split-type, coaxially split into two machines for arrangement. Again, the generator driven by the motor is multi-machine type, split into multi-machine non-coaxial arrangement, and rotated by belt pulleys and sprockets. Secondly, the total power of the generator is greater than the total power of the motor.

9. A motor-driven generator according to claim 1, characterized in that, The bearings of the generator driven by the motor are permanent magnet suspension bearings, electromagnetic suspension bearings, a hybrid type of electromagnet and permanent magnet bearings, air suspension bearings, oil suspension bearings, and ceramic bearings.

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