CN115714517A - Magnetic suspension motor generator - Google Patents

Abstract

The windings of the generator and the radial magnetic levitation motor are respectively wound in the same stator core, and the power of the generator is greater than the sum of the power of the radial and axial magnetic levitation motors; In the machine, when the external power supply energizes the stator windings of the radial and axial magnetic bearing motors, the rotor of the generator rotates at a high speed, and the stator windings of the generator generate induced current, which is filtered and stabilized by the rectifier capacitor inductance to The DC bus supplies power. When the generator speed is at a preset value, the DC bus supplies power to the radial and axial magnetic levitation motors through a DC-DC step-down module, and at the same time, the DC bus supplies power to the Grid power supply; power controller implements electric energy storage, conversion and recombination.

Description

A magnetic levitation motor generator

technical field

The invention belongs to the technical field of motors and generators, electric energy and mechanical energy conversion technology, renewable electric energy and new energy, and relates to a magnetic levitation motor generator.

Background technique

The problems of energy security and environmental pollution that have always been associated with it are the two most difficult bottlenecks. Petroleum security

Safety, resources are tight, and harmful substances are emitted from the exhaust gas when the car is running, which damages the environment and human health.

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

Pure electric vehicles have a 700-kilometer battery life and it is difficult to break through. The core lies in the power battery material, which has not yet had a revolutionary breakthrough. It is difficult to solve the problems of vehicle performance, manufacturing cost and use safety. For example, increasing the number of power batteries means that the weight of the vehicle will increase. It is difficult to break through the technology of increasing the battery life by increasing the energy density of the power battery, which has become the bottleneck of the battery life of pure electric vehicles.

At present, representative related technologies about magnetic levitation motor generators include the following: CN208656573 U discloses a multi-stage flywheel starter drive generator, CN201811338508-self-circulating magnetic levitation flywheel energy storage generator, CN201510217219-a star-shaped electromagnetic power generation machine, CN201610001301-circulating motor generator set, CN201811338508-self-circulating magnetic levitation flywheel energy storage generator, CN201710535206-counterweight flywheel high-rotation inertia drive generator, CN 109256902A a high-speed permanent magnet motor with integrated circulation cooling of stator and rotor and its Cooling method, CN110165821A A novel horizontal self-pumping vacuum chamber high-integration flywheel energy storage device, the technical defect is that the energy density is not enough, and the actual industrial level application value cannot be reached.

Contents of the invention

In view of the above problems, the motor is a process of converting electrical energy into mechanical energy, and the generator is a process of converting mechanical energy. The power of the generator is greater than the power of the motor, and the generator system has its own power motor, driven by radial and axial magnetic levitation motors. The rotor of the generator is forced to rotate at a high speed, and the mutual conversion of electric energy becomes simpler and higher, so that the electric energy output by the generator is greater than the energy consumed by the motor drive, and part of the electric energy emitted by the generator output is returned to the drive motor to realize the electric energy cycle for power generation The machine provides power supply, and part of the electric energy supplies power to the rated power load under the premise of constant voltage and constant current, so as to realize electric energy circulation, conversion and regeneration.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is implemented in this way.

A magnetic levitation motor generator, characterized in that it includes a vacuum casing, a self-evacuation device, a cooling system, a radial and axial magnetic levitation motor auxiliary bearing system, a generator 101, a rotor hollow shaft 106 and a rotor core support 108; The windings of the generator 101 and the radial magnetic levitation motor 102 are respectively wound in the same stator core 104, and the power of the generator 101 is greater than the sum of the power of the radial and axial magnetic levitation motors 103; The magnetic levitation motor 102 is parasitic in the generator 101. When the external power supply energizes the stator windings of the radial and axial magnetic bearing motors, the rotor of the generator 101 rotates at a high speed, and the stator windings of the generator 101 generate an induced current , supply power to the DC bus through rectification capacitor inductance filtering and stabilized voltage, when the rotation speed of the generator 101 is a preset value, the DC bus supplies power to the radial and axial magnetic levitation motors through the DC-DC step-down module, At the same time, the DC bus supplies power to the grid through the inverter; the power controller implements storage, conversion and recombination of electric energy.

In one of the embodiments, the vacuum casing is in the shape of a round pot and includes a body 109 and a cover 110; the body has a built-in axial cooling channel 119 and a concave ring groove cooling channel on the axial end surface, the The machine cover 110 is provided with a vacuum suction port, a cooling channel inlet and outlet 125, a shaft sleeve, and its wall is provided with a star-shaped cooling channel 123, an annular cooling channel 121 and an axial cooling channel 122, wherein the inner circle of the shaft sleeve and The end surface of the machine cover is provided with a concave annular groove cooling channel, and the cooling channels of the body 109 and the machine cover 110 are connected to each other; the body 109 is tightly connected with the casing cover by screws and sealant, and The vacuum casing is made of aluminum alloy and carbon fiber resin composite material.

In one of the embodiments, the radial magnetic bearing motor and generator 101, including the radial magnetic bearing motor and generator 101 share one rotor core 105 and stator core 104, and the stator The iron core 104 winds the windings of the radial magnetic levitation motor 102 and the generator 101 respectively, and the stator winding cogging occupancy number of the generator 101 is greater than the stator winding cogging occupancy number of the radial magnetic levitation motor 102; The same tooth slot of the stator core 104 is respectively wound the windings of the radial magnetic levitation motor 102 and the generator 101, and the winding turns of the generator 101 winding are greater than the radial magnetic levitation motor 102 winding turns; The windings form two star-shaped winding connections and multiple star-shaped winding connections; finally, when the radial magnetic levitation motor 102 is driven, the suspended phase of the windings generates a closed circuit instantaneously in turn to output an induced current under the control of a power device. The rectification capacitor inductance filters and stabilizes the voltage to supply power to the DC bus.

In one of the embodiments, the radial and axial magnetic levitation motor auxiliary bearing system includes a radial and axial magnetic levitation motor, a rotor hollow shaft 106 and an auxiliary bearing 107; the radial magnetic levitation motor 102 drives and forces the rotor The auxiliary bearing 107 of the hollow shaft is radially suspended, and the axial magnetic levitation motor 103 is driven to force the auxiliary bearing 107 of the hollow shaft of the rotor to be axially suspended, and the auxiliary bearing 107 presents a radial and axial rotational suspension support state; The radial magnetic levitation motor 102 is a rotary motor, and the axial magnetic levitation motor 103 is a disc motor, and the stator of the disc motor has an iron core and an iron coreless structure, and the rotor structure is a double-sided structure fixed or rotated in the middle. structure and two fixed disks with a rotating disk in the middle to form a double air gap structure; when the axial magnetic levitation motor 103 is driven, the suspended phase of the winding will generate a closed circuit under the control of the power device to output the induced current instantaneously in turn , supply power to the DC bus through rectifying capacitor inductance filtering and stabilizing voltage; the auxiliary bearing 107 is a permanent magnet suspension bearing, an electromagnetic suspension bearing, an electromagnet type and a permanent magnet hybrid bearing, an air suspension bearing, an oil suspension bearing and a ceramic bearing.

Further, parasitic on the radial magnetic levitation motor 102 of the generator 101, when the radial magnetic levitation motor 102 is driven, two or two turns of the three-phase motor are instantaneously turned on, one phase is a suspended phase, and the suspended one phase is instantaneously turned on The induced current is derived, and the voltage is stabilized by rectification and stabilization capacitor inductance to filter and stabilize the voltage to supply power to the DC bus.

Further, when the axial magnetic levitation motor 103 is driven, two or two of the three-phase motors are turned on instantaneously in turn, and one phase is a suspended phase, and the suspended phase instantaneously derives the induced current in turns, and the voltage is stabilized to DC through rectification and stabilization capacitor inductance filtering. Bus powered.

Further, the radial and axial magnetic levitation motor windings are single-phase, three-phase, four-phase, five-phase or multi-phase.

Further, the stator core 104 and the rotor core are made of silicon steel, ferrite and amorphous magnetically permeable material, wherein the amorphous magnetically permeable material is an iron-based amorphous alloy; the stator core 104 is an inner stator Iron core 104 and outer stator core 104.

In one of the embodiments, when the radial magnetic levitation bearing motor is no longer parasitic on the generator 101, the radial magnetic levitation motor 102 is placed on both sides of the generator 101, and the axial magnetic levitation motor 103 Placed on the side of the generator 101 to form four sets of radial magnetic levitation motor 102, the generator 101, radial magnetic levitation motor 102 and axial magnetic levitation motor 103; wherein the radial magnetic levitation motor 102 is a DC motor and an asynchronous motor , a synchronous motor, the synchronous motor includes a permanent magnet synchronous motor, a reluctance synchronous motor and a hysteresis synchronous motor, the asynchronous motor includes an induction motor and an AC commutator motor, and the induction motor includes a three-phase asynchronous motor, a single-phase An asynchronous motor and a shaded pole asynchronous motor, the AC commutator motor includes a single-phase series-excited motor, an AC-DC dual-purpose motor and a repelling motor.

Further, the radial and axial magnetic levitation motors include permanent magnet rotors and stator cores, and the permanent magnet rotors are permanent magnet multi-pole ring rotors, surface-protruding permanent magnet rotors, surface-embedded permanent magnet rotors, and built-in permanent magnet rotor, wherein the permanent magnet rotor is divided into an inner permanent magnet rotor and an outer permanent magnet rotor, and the permanent magnet is further divided into a rotor and a stator; the stator core and the rotor core are made of silicon steel, ferrite and An amorphous magnetically permeable material, wherein the amorphous magnetically permeable material is an iron-based amorphous alloy; the stator core is an inner stator core and an outer stator core.

Further, when the radial magnetic levitation bearing motor is no longer parasitic on the generator 101, the radial magnetic levitation motor 102 and the axial magnetic levitation motor 103 are placed on both sides of the generator 101, forming a radial The magnetic levitation motor 102, the generator 101 and the axial magnetic levitation motor 103 are arranged in three machines.

Further, the radial magnetic levitation motor 102 is parasitic in the generator 101 , and the radial magnetic levitation motor 102 and the generator 101 form a composite structure when the axial magnetic levitation bearing motor is not provided.

In one of the embodiments, when the generator 101 no longer parasitizes the radial magnetic bearing motor, the generator includes a DC generator and an AC generator, and the AC generator includes a synchronous generator and an asynchronous generator machine, the alternator also includes a single-phase generator and a three-phase generator, and secondly also includes an equal power generator, a doubly-fed generator and an excitation generator; again, the generator rotor structure is an inner rotor and an outer rotor; Next, the winding structure of the generator stator core 104 is an inner stator core winding and an outer stator core 104 winding.

Further, the hollow rotating shaft of the magnetic levitation motor generator rotor is equipped with a propeller for aircraft electric engines and ship electric propeller propellers.

Further, the generator includes a permanent magnet rotor and a stator core, and the permanent magnet rotor is a permanent magnet multi-pole ring rotor, a surface-protruded permanent magnet rotor, a surface-embedded permanent magnet rotor, and a built-in permanent magnet rotor, Wherein the permanent magnet rotor is divided into an inner permanent magnet rotor and an outer permanent magnet rotor, and the permanent magnet is further divided into a rotor and a stator; the stator core and the rotor core are made of silicon steel, ferrite and amorphous magnetic materials , wherein the amorphous magnetic material is an iron-based amorphous alloy; the stator core is an inner stator core and an outer stator core.

In one of the embodiments, the hollow rotor shaft 106 has a stepped outer circle and two chambers in the inner circle, the outer circle includes a shaft journal, a shaft body concave keyway and a notch, and the shaft journal and shaft body are equipped with A plurality of cooling passage holes 137 of the outer circular concave ring groove are tangentially connected with the cooling flow passage of the inner circular concave ring groove of the shaft sleeve of the machine cover 110 and the rotor iron core support sleeve, and secondly, the shaft body of the hollow rotor shaft 106 The concave keyway intersects and is tangent to the inner circular convex teeth of the rotor iron core bracket sleeve, and the journal is provided with an auxiliary bearing 107, and the inner ring of the auxiliary bearing is tangent to the journal; secondly, the inner circle two cavities One cavity is an inflow cooling channel and the second cavity is an outflow cooling channel; the rotor hollow shaft 106 is made of aluminum alloy and carbon fiber resin composite.

In one of the embodiments, the cooling system includes an integrated structure of the casing cooling passage, the rotor core support 108 cooling passage, and the rotor hollow shaft cooling passage; the casing cooling passage includes the machine The cover and the body cooling channel, the wall of the cover 110 has a built-in annular cooling channel 121, an axial cooling channel 122, and a star-shaped cooling channel 123, wherein the cover shaft sleeve and the end surface of the machine cover are provided with concave rings Cooling channel 124, secondly, the cover 110 has an external cooling channel inlet and outlet 125; the body 109 has a built-in axial cooling channel 119 and an axial end surface is provided with a concave annular cooling channel 120; the rotor core The bracket cooling channel includes an annular cooling channel 126, an axial cooling channel 127, a star-shaped cooling channel 128 and a shaft sleeve concave annular cooling channel 129; the rotor hollow shaft cooling channel includes an outer circular concave annular cooling flow hole 130. The two chambers in the inner circle are the first-cavity cooling channel 131 and the second-cavity cooling channel; the machine cover 110, the body 109, the rotor core support 108 and the rotor hollow shaft cooling channel communicate with each other; The inlet and outlet 125 of the external cooling channel of the machine cover 110 and the inlet and outlet of the external radiator communicate with each other and are cooled and circulated by the circulation pump.

Further, the external inlet of the cooling channel of the machine cover 110 flows into the cooling liquid, and the cooling liquid flows to the annular cooling channel 121 of the machine cover, the star-shaped cooling channel 123, the concave annular cooling channel 124 of the shaft sleeve, and flows to the The hollow shaft of the rotor has an outer concave annular cooling flow hole 130, an inner circle one-cavity cooling channel 131, and an outer concave annular cooling flow hole 130, which flow to the rotor iron core support shaft sleeve concave annular cooling flow channel 129, and the star-shaped cooling channel. Flow channel 128, annular cooling channel 126, axial cooling channel 127, annular cooling channel 126, star-shaped cooling channel 128, shaft sleeve concave annular cooling channel 129, flow to the outer circular concave annular cooling channel of the hollow shaft of the rotor Circulation hole 130, inner circle two-cavity cooling channel 132, flow to the concave annular cooling channel 124 of the cover shaft sleeve, star-shaped cooling channel 123, annular cooling channel 121, and the external outlet from the cover cooling channel flow out; secondly, the cooling liquid is divided from the annular cooling channel 121 of the machine cover to the axial cooling channel 122 and the concave annular cooling channel 124, and flows to the concave annular cooling channel 120 and the axial cooling channel on the axial end surface of the body. 119. The concave annular cooling channel 120 on the shaft end surface flows to the concave annular cooling channel 124 on the end surface of the machine cover, and the axial cooling channel 122 merges with the annular cooling channel 121, and flows out through the external outlet of the cooling channel on the cover ; The inlet and outlet 125 of the external cooling channel of the machine cover and the inlet and outlet of the external radiator communicate with each other and are cooled and circulated by the circulating pump.

In one of the embodiments, the self-pumping vacuum device includes a built-in pump body 112, a pump rotor 113, a pump rotor shaft, turbine blades 115, a self-pumping vacuum outlet 116, a one-way valve and a vacuum pressure gauge; The pump body 112 is embedded in the inner side of the cover, and the inner side of the cover is provided with the self-pumping air-pumping mesh 117, and the air-pumping mesh 117 communicates with the cavity 118 of the cover. The cover cavity 118 is connected with the self-pumping vacuum outlet 116, and the vacuum exhaust outlet is provided with a one-way valve and a vacuum pressure gauge; They are tangentially intersected and locked with bolts; the pump rotor 113 rotates synchronously with the rotor hollow shaft 106; the materials of the pump rotor 113 and the turbine blades 115 are aluminum alloy and carbon fiber resin composite materials.

In one of the embodiments, the power controller system includes an external power supply module, a DC-DC step-down converter, a dual power supply automatic switching module, a radial and axial magnetic levitation motor control module, and a radial and axial magnetic levitation motor Suspension phase rectification voltage stabilization capacitor inductance filter module, generator 101 rectification voltage stabilization capacitor inductance filter module; When the external power supply module supplies power, the current of the radial and axial magnetic levitation motor stator core 104 windings is controlled by PWM, forcing all The rotor of the generator 101 rotates synchronously at a high speed, and the winding of the stator core 104 of the generator 101 generates an induced current, which is rectified and stabilized by capacitor and inductive filtering to supply power to the DC bus. Piezocapacitive inductive filtering supplies power to the DC bus; when the speed of the generator 101 reaches a preset value, the DC bus automatically replaces the power supply to the radial and axial magnetic levitation motor control modules through the DC-DC step-down converter; the The motor generator 101 enters the self-supply mode; when the external load needs to supply power, the DC bus supplies power to the load.

Further, the high-voltage insulation monitoring module is used for real-time monitoring of leakage current faults and disconnecting all power supplies in the circuit; the detection and diagnosis module is used for voltage, current, speed, temperature, overvoltage and overcurrent protection to drive the motor M1 and generator safe operation; the cooler device is composed of multi-layer oil cooling, air cooling, liquid cooling, cooling pipes and heat-absorbing fins for power control and heat dissipation.

Further, the DC-DC conversion module conversion circuit includes a forward conversion circuit, a flyback conversion circuit, a full-bridge conversion circuit, a half-bridge conversion circuit and a push-pull conversion circuit.

Further, the power supply capacity of the generator is limited to the electric energy generated and output at the generator's instant speed to supply power to the load, and the load loss, inductive load and pure resistive load's immediate total power consumption should be less than the generator's instant speed The generated electricity, otherwise the generator will be undervoltage.

The beneficial effects of the present invention are as follows: (1) The generator has its own power motor system, and the electric energy generated by the generator meets the power supply requirements of the generator's drive motor and loads, and realizes electric energy cycle power supply and electric energy regeneration.

(2) To achieve integrated one-time heat dissipation, the cooling system includes an integrated structure of the cooling channel of the casing, the cooling channel of the rotor iron core support, and the cooling channel of the rotor hollow shaft; the power density of the magnetic levitation motor generator is improved.

(3) The self-pumping device and the rotor of the turbo pump make the magnetic levitation motor generator system further energy-saving.

Description of drawings

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

Figure 1 Cutaway view of the magnetic levitation motor generator assembly.

Fig. 2 Cutting structure measurement view of the magnetic levitation motor generator.

Fig. 3 Principle block diagram of total power control of maglev motor generator.

In the figure: generator 101; radial magnetic levitation motor 102; axial magnetic levitation motor 103; stator core 104; rotor core 105, rotor hollow shaft 106, auxiliary bearing 107; rotor core support 108; machine body 109, machine cover 110 ; Built-in pump body 112; Pump rotor 113; Turbine blade 115; Self-pumping vacuum outlet 116; Cover annular cooling channel 121; cover axial cooling channel 122; cover star cooling channel 123; cover concave annular cooling channel 124; cover external cooling channel inlet and outlet 125; rotor core support ring Cooling channel 126; rotor core support axial cooling channel 127; rotor core support star-shaped cooling channel 128, rotor core support sleeve concave annular cooling channel 129; rotor hollow shaft concave annular cooling flow hole 130; Rotor hollow shaft one-cavity cooling channel 131; rotor hollow shaft two-cavity cooling channel 132; rotor hollow shaft journal 136; rotor hollow shaft outer circular groove cooling channel through hole 137; magnetic levitation motor generator assembly 138.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Example 1

In the specific embodiment 1, the rotor hollow shaft of the magnetic levitation motor generator 101 is equipped with a propeller for the application of an aircraft electric engine.

Starting power supply, value-guaranteed agricultural drone with a load of 300 kg, 4 propeller magnetic levitation motor generators 101 with a total power of 13KW, value-guaranteed agricultural drone startup, and the starting power supply to the radial and axial magnetic levitation motors in the magnetic levitation motor generator 101 Power is supplied, the propeller rotates, and the value-guaranteed agricultural drone takes off. When the rotational speed of the magnetic levitation motor generator 101 reaches a preset value, the generator 101 in the magnetic levitation motor generator 101 supplies power to the busbar through voltage stabilization, and the busbar power supply generates power to the magnetic levitation motor. The motor in the machine 101 replaces the power supply to realize the unlimited mileage of the value-guaranteed agricultural unmanned flight.

Example 2

In the specific embodiment 2, the application of the magnetic levitation motor generator 101 in a pure electric vehicle.

Car starting battery, magnetic levitation motor generator 101 total power 150KW, radial and axial magnetic levitation motor drive controller, generator 101 regulator, dual power supply automatic switching module, hub motor 50KW, hub motor controller, pure electric vehicle start, The car starts the power supply, supplies power to the radial and axial magnetic levitation motors in the magnetic levitation motor generator 101, and the radial and axial magnetic levitation motors rotate at high speed, forcing the rotors of the generator 101 to rotate at high speed synchronously, and the generator 101 is rectified and stabilized To supply power to the DC bus, when the rotation speed of the generator 101 reaches a preset value, the DC bus supplies power to the radial and axial magnetic levitation motor control modules through the DC-DC step-down converter; the DC bus simultaneously supplies power to the hub The motor supplies power, the hub motor controller drives the hub motor to rotate, and the pure electric vehicle starts to run. When the pure electric vehicle brakes or goes downhill, the magnetic levitation motor generator 101 runs at idle speed, charges the car battery through the DC bus, and the in-wheel motor inverter charges the motor and battery in the magnetic levitation motor generator 101 .

Example 3

In a specific embodiment, the magnetic levitation motor generator 101 supplies power to the grid through inversion.

The radial magnetic levitation bearing motor is no longer parasitic on the generator 101, the radial magnetic levitation motor 102 is placed on both sides of the excitation generator 101, and the axial magnetic levitation motor 103 is placed on the generator The side 101 is composed of radial magnetic levitation motor 102 , the excitation generator 101 , radial magnetic levitation motor 102 and axial magnetic levitation motor 103 .

Start external power supply, drive power of 2 radial magnetic levitation motors 102 each 1MW, axial magnetic levitation motor 1MW, excitation generator 101 power 5MW, radial and axial magnetic levitation motor drive controller, dual power supply automatic switching module, excitation power generation Machine constant pressure flow regulator.

Starting mode: external power supply supplies power to the radial and axial magnetic levitation motor controllers, the radial and axial magnetic levitation motor controllers drive the rotors of the radial and axial magnetic levitation motors to rotate at high speed, and the excitation generator 101 rotor is synchronously cut in the generator 101 The stator winding generates induced current, and the stator winding in the excitation generator 101 supplies power to the DC bus through the rectification capacitor inductance filter module. When the rotation speed of the excitation generator 101 is a preset value, the DC bus passes through the DC-DC step-down converter The radial and axial magnetic levitation motor control modules are automatically replaced with power; the magnetic levitation motor generator 101 enters the self-supply mode; at the same time, the DC bus supplies power to the grid through the inverter.

In the foregoing description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the above descriptions are only preferred embodiments of the present invention, and the present invention can be implemented in many other ways different from those described here, so the present invention is not limited by the specific implementations disclosed above. At the same time, any person skilled in the art can use the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention that do not deviate from the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. A magnetic levitation motor generator, is characterized in that, comprises vacuum casing, self-evacuation device, cooling system, radial and axial magnetic levitation motor auxiliary bearing system, generator, rotor hollow shaft and rotor iron core support; The windings of the generator and the radial magnetic levitation motor are respectively wound in the same stator core, and the power of the generator is greater than the sum of the power of the radial and axial magnetic levitation motors; the radial magnetic levitation motor is parasitic on the generator Among them, when the external power supply energizes the stator windings of the radial and axial magnetic bearing motors, the rotor of the generator rotates at a high speed, and the stator windings of the generator generate an induced current, which is filtered and stabilized by the rectifier capacitor inductance to DC Bus power supply, when the generator speed is a preset value, the DC bus supplies power to the radial and axial magnetic levitation motors through the DC-DC step-down module, and at the same time, the DC bus supplies power to the power grid through the inverter Power supply; power controller implements electric energy storage, conversion and recombination. 2. A kind of magnetic levitation motor generator according to claim 1, characterized in that, the vacuum casing is a round pot shape including a body and a machine cover; the body has a built-in axial cooling flow channel and an axial end surface is equipped with Concave annular groove cooling channel, the machine cover is provided with vacuum suction port, cooling channel inlet and outlet, shaft sleeve, and its wall is provided with star-shaped cooling channel, annular cooling channel and axial cooling channel, wherein the The inner circle of the shaft sleeve and the end surface of the machine cover are provided with a concave ring groove cooling flow channel, and the cooling channels of the body and the machine cover are connected to each other; the body and the casing cover are tightly connected by screws and sealant, The vacuum casing is made of aluminum alloy and carbon fiber resin composite material. 3. A magnetic levitation motor generator according to claim 1, characterized in that, said radial magnetic levitation bearing motor and generator, including said radial magnetic levitation bearing motor and generator sharing one said rotor core and The stator core, the stator core respectively winds the windings of the radial magnetic levitation motor and the generator, and the number of cogging slots occupied by the stator winding of the generator is greater than that of the stator winding cogging of the radial magnetic levitation motor number; secondly the same tooth slot of the stator core winds the windings of the radial magnetic levitation motor and the generator respectively, and the number of turns of the generator winding is greater than the number of turns of the radial magnetic levitation motor winding; Said winding constitutes two star-shaped winding connections and multiple star-shaped winding connections; finally, when said radial magnetic levitation motor is driven, the suspended phase of said winding generates a closed circuit under the control of a power device to instantaneously take turns to output an induced current, which is passed through a rectifying capacitor The inductance filter stabilizes the voltage to supply power to the DC bus. 4. A kind of magnetic levitation motor generator according to claim 1, characterized in that, said radial and axial magnetic levitation motor auxiliary bearing systems include radial and axial magnetic levitation motors, rotor hollow shafts and auxiliary bearings; The drive of the radial magnetic levitation motor forces the auxiliary bearing of the rotor hollow shaft to radially levitate, the drive of the axial magnetic levitation motor forces the auxiliary bearing of the rotor hollow shaft to levitate axially, and the auxiliary bearing exhibits radial and axial rotation Suspension support state; the radial magnetic levitation motor is a rotary motor, the axial magnetic levitation motor is a disc motor, and the stator of the disc motor has an iron core and an iron coreless structure, and the rotor structure is fixed in the middle or The double-air-gap structure consists of a double-sided structure with two fixed disks and a rotating disk sandwiched between them; when the axial magnetic levitation motor is driven, the suspended phase of the winding is controlled by a power device to generate a closed circuit for instantaneous rotation Output the induced current, filter and stabilize the voltage to the DC bus through the rectification capacitor and inductance; the auxiliary bearings are permanent magnet suspension bearings, electromagnetic suspension bearings, hybrid bearings of electromagnet and permanent magnets, air suspension bearings, oil suspension bearings and ceramic bearings . 5. A kind of magnetic levitation motor generator according to claim 1, characterized in that, when the radial magnetic levitation bearing motor is no longer parasitic on the generator, the radial magnetic levitation motor is placed in the generator On the two sides, the axial magnetic levitation motor is placed on the side of the generator to form four sets of radial magnetic levitation motor, the generator, radial magnetic levitation motor and axial magnetic levitation motor; wherein the radial magnetic levitation motor is a DC motor , an asynchronous motor, a synchronous motor, the synchronous motor includes a permanent magnet synchronous motor, a reluctance synchronous motor and a hysteresis synchronous motor, the asynchronous motor includes an induction motor and an AC commutator motor, and the induction motor includes a three-phase asynchronous motor . A single-phase asynchronous motor and a shaded-pole asynchronous motor, wherein the AC commutator motor includes a single-phase series-excited motor, an AC-DC dual-purpose motor and a repelling motor. 6. A kind of magnetic levitation motor generator according to claim 1, characterized in that, when the generator is no longer parasitic to the radial magnetic bearing motor, the generator includes a DC generator and an AC generator, The alternator includes a synchronous generator and an asynchronous generator, and the alternator also includes a single-phase generator and a three-phase generator, and secondly includes an equal power generator, a doubly-fed generator and an excitation generator; again, the The rotor structure of the generator described above is an inner rotor and an outer rotor; the stator core winding structure of the generator described next is an inner stator core winding and an outer stator core winding. 7. A magnetic levitation motor generator according to claim 1, characterized in that, the hollow shaft of the rotor is a stepped shape of an outer circle and a two-cavity structure of an inner circle, and the outer circle includes a journal, a shaft body concave keyway and In the notch, the shaft journal and the shaft body are provided with a plurality of outer circular concave ring groove cooling flow channel through holes 137, which are tangentially connected with the inner circular concave ring groove cooling flow channel of the cover shaft sleeve and the rotor core support sleeve. , secondly, the hollow keyway of the hollow shaft of the rotor intersects and is tangent to the inner circular convex teeth of the sleeve of the rotor iron core support, the journal is provided with an auxiliary bearing, and the inner ring of the auxiliary bearing is in contact with the journal Secondly, the two cavities of the inner circle are the first cavity inflow cooling channel and the second cavity is the outflow cooling channel; the hollow shaft of the rotor is made of aluminum alloy and carbon fiber resin composite. 8. A magnetic levitation motor generator according to claim 1, 2 or 7, characterized in that the cooling system comprises the casing cooling passage, the rotor core support cooling passage, the rotor hollow shaft cooling flow Channel integrated structure; the cooling channel of the casing includes the cooling channel of the machine cover and the body, and the wall of the cover has built-in annular cooling channel, axial cooling channel and star-shaped cooling channel, wherein the The shaft sleeve of the machine cover and the end surface of the machine cover are provided with a concave annular cooling flow channel, and secondly, the inlet and outlet of the external cooling flow channel of the machine cover; the built-in axial cooling flow channel of the body wall and the axial end surface are provided with a concave annular cooling flow channel ; The rotor core support cooling channel includes an annular cooling channel, an axial cooling channel, a star-shaped cooling channel and a shaft sleeve concave annular cooling channel; the rotor hollow shaft cooling channel includes an outer circular concave annular cooling channel The circulation hole and the inner circle two cavities are the one-cavity cooling channel and the two-cavity cooling channel; the machine cover, the body, the rotor core support and the rotor hollow shaft cooling channel communicate with each other; the machine The inlet and outlet of the external cooling channel of the cover communicate with the inlet and outlet of the external radiator and are cooled and circulated by the circulation pump. 9. A magnetic levitation motor generator according to claim 1 or 2, characterized in that the self-pumping vacuum device includes a built-in pump body, a pump rotor, a pump rotor shaft, turbine blades, a self-pumping vacuum outlet, One-way valve and vacuum pressure gauge; the built-in pump body is inlaid on the inside of the cover, and the inside of the cover is provided with the self-pumping air mesh, and the air mesh is connected to the The cavity of the machine cover is connected, and the cavity of the machine cover is connected with the self-pumping vacuum outlet, and the vacuum exhaust outlet is provided with a one-way valve and a vacuum pressure gauge; the outer circular concave keyway of the hollow shaft of the rotor is connected with the The inner circular convex keyways are tangentially intersected and locked with bolts; the pump rotor and rotor hollow shaft rotate synchronously; the pump rotor and turbine blades are made of aluminum alloy and carbon fiber resin composite materials. 10. A magnetic levitation motor generator according to claim 1, 3 or 4, characterized in that the power controller system includes an external power supply module, a DC-DC step-down converter, a dual power supply automatic switching module, Radial and axial magnetic levitation motor control module, radial and axial magnetic levitation motor suspension phase rectification capacitor inductance filter voltage stabilization module and generator rectification capacitor inductance filter voltage stabilization module; when the external power supply module supplies power, the radial The current of the stator core winding of the magnetic levitation motor and the axial direction force the rotor of the generator to rotate synchronously at a high speed, and the stator core winding of the generator generates an induced current, which is filtered and stabilized by the rectifying capacitor and inductance to supply power to the DC bus. At the same time, the The suspension phase of the radial and axial magnetic levitation motors is filtered and stabilized by the rectifier capacitor inductance to supply power to the DC bus; when the generator speed reaches the preset value, the DC bus supplies the radial and axial Automatic replacement of power supply to the control module of the magnetic levitation motor; the motor generator enters into a self-power supply mode; when the external load needs power supply, the DC bus supplies power to the load.

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