CN110729871B - Radial coaxial integrated high-power-density inertial energy storage pulse power supply system - Google Patents

Abstract

A radial coaxial integrated high-power density inertial energy storage pulse power supply system relates to the technical field of inertial energy storage pulse power supply. The invention is to solve the problem of the existing traditional inertial energy storage pulse power system, the prime mover and the pulse generator are mechanically connected through a coupling, resulting in large axial length, large mechanical noise, low power density, poor reliability, and traditional The armature winding of the system is made of copper wire. When discharging, the armature winding will generate a large transient current, which will damage the armature winding. The inner stator, rotor and outer stator are coaxially nested from the inside to the outside, there is an air gap between the inner stator and the rotor, and an air gap between the outer stator and the rotor; the motor armature winding and the generator armature winding are made of copper-based carbon nanomaterials. Tube wire made. It acts as a pulse power supply.

Description

Radial coaxial integrated high power density inertial energy storage pulse power system

technical field

The invention relates to a pulse generator power supply system, and belongs to the technical field of inertial energy storage pulse power supply.

Background technique

Pulse generator, as an inertial energy storage pulse power source, uses the prime mover for driving operation. The pulse generator integrates inertial energy storage, electromechanical energy conversion and power regulation, and has the comprehensive advantage of "single component". It has the advantages of high energy density, high power density, suitable for repeated discharge, flexible adjustment of pulse waveform, etc., and has wide application prospects in military, industrial and civil fields.

For the traditional inertial energy storage pulse power system, the prime mover and the pulse generator are mechanically connected through the coupling. When discharging, the instantaneous impact will increase the mechanical noise, increase the risk of damage to the coupling, and increase the maintenance cost. , reducing the safety and reliability of the power system.

When the pulse generator discharges, the armature winding flows through an instantaneous strong current, and the large copper loss will cause the winding to generate a high temperature rise in a very short time. The traditional cooling structure has limited rapid heat dissipation capability and poor heat dissipation conditions under high-speed operation, which also limit the output capability, burst capability, and further improvement of power density and energy storage density of the motor. At the same time, at the moment of discharge, the strong impact torque brought by the instantaneous current will also impact the slotless armature winding, which is also a great test for the strength of the winding.

SUMMARY OF THE INVENTION

The invention is to solve the problem of the existing traditional inertial energy storage pulse power supply system, the prime mover and the pulse generator are mechanically connected through a coupling, resulting in large axial length, large mechanical noise, low power density, poor reliability, and traditional The armature winding of the system is made of copper wire. When discharging, the armature winding will generate a large transient current, which will damage the armature winding. Radial coaxial integrated high power density inertial energy storage pulse power system is now available.

Radial coaxial integrated high power density inertial energy storage pulse power system, the system includes an outer stator, an inner stator and a rotor,

The inner stator, the rotor and the outer stator are coaxially nested from the inside to the outside, there is an air gap between the inner stator and the rotor, and an air gap between the outer stator and the rotor;

The inner stator includes a motor stator fixed shaft 1, a motor stator back yoke 2, a motor laminated stator iron core 3 and a motor armature winding 4,

The rotor includes a carbon fiber support body 5 inside the rotor and a plurality of permanent magnets 7,

The motor stator back yoke 2 is fixed on the outer circumferential surface of the motor stator fixed shaft 1. The outer circumferential surface of the motor stator back yoke 2 is covered with a motor laminated stator iron core 3, and the outer surface of the motor laminated stator iron core 3 is along the circumference. A plurality of teeth are evenly arranged in the direction, and the motor armature winding 4 is wound on the teeth. A plurality of permanent magnets 7 are evenly distributed along the circumferential direction, and the polarities of two adjacent permanent magnets 7 are opposite;

The outer stator includes a generator carbon fiber support body 10, a generator armature winding 11 and a generator stator yoke 12,

The generator carbon fiber support body 10 is sleeved on the outer circumferential surface of the plurality of permanent magnets 7 at the same time, and the outer surface of the generator carbon fiber support body 10 is evenly provided with a plurality of supporting teeth along the circumferential direction, and the generator armature windings are wound on the supporting teeth. 11. The generator stator yoke 12 is sleeved outside the generator armature winding 11;

Both the motor armature winding 4 and the generator armature winding 11 are made of copper-based carbon nanotube wires.

Preferably, the rotor also includes a permanent magnet interpole filler 6,

The space between two adjacent permanent magnets 7 is filled with fillers 6 between the permanent magnets.

Preferably, the rotor also includes a compensation cylinder 8 and a carbon fiber strap 9 outside the rotor,

Between the permanent magnet 7 and the generator carbon fiber support body 10, a compensation cylinder 8 and a carbon fiber strap 9 on the outside of the rotor are arranged.

The carbon fiber straps 9 on the outer side of the rotor are sleeved on the outer circumferential surface of the compensation cylinder 8 .

Preferably, the system further includes a housing 13,

The casing 13 is sleeved on the outer circumferential surface of the generator stator yoke 12 .

Preferably, the generator armature winding 11 includes an A-phase armature winding 11-1 and a B-phase armature winding 11-2, and the A-phase armature windings 11-1 and B-phase armature windings 11-2 are alternately arranged.

The beneficial effects of the present invention are:

The invention proposes the inventive idea that the motor and the generator share a coaxial rotor, which greatly simplifies the system structure, reduces the axial length, eliminates the coupling between the motor and the generator, reduces mechanical noise, and reduces the volume and quality of the entire power supply system. Improve power density and reliability. The inner stator and the outer stator share a rotor, and the rotor adopts a permanent magnet scheme, which can eliminate the brushes and slip rings, improve the reliability of the system, and facilitate the high-speed operation of the rotor to further improve the power density.

In addition, the armature windings in the motor and generator in this application are made of copper-based carbon nanotube wires, because the copper-based carbon nanotube composite material (copper-carbon nanotubes, Copper-Carbon Nanotubes, referred to as Cu -CNTs) has excellent characteristics, high electron migration rate, can accommodate maximum current density, conductivity is 10 times that of pure copper, current capacity is 100 times that of pure copper, thermal conductivity is 10 times that of pure copper, and the strength is 300 times that of copper. times, the mass density is only 1/4-1/6 of copper, with extremely low temperature coefficient of resistance, no skin effect and proximity effect. Copper-based carbon nanotube wires have the advantages of high electrical conductivity, low temperature coefficient of resistance, low mass density, high strength and high current carrying capacity, which are very consistent with the special application conditions of pulse generators. The armature windings on the inner stator and the outer stator of the present application are all made of copper-based carbon nanotube wires, and copper-based carbon nanotube wires are used to make multi-stranded wires (Litz wires) to reduce the eddy current loss between the winding conductors, It can greatly improve the discharge capacity of the pulse generator and increase the repetitive discharge frequency of the pulse generator. When the generator discharges, the winding flows through a large instantaneous current. The heat capacity and resistivity of the wire material restrict the current peak value and pulse width, which limits the output capacity of the motor. Therefore, the introduction of copper-based carbon nanotube wires can increase the winding current carrying capacity and reduce the winding current capacity. The loss and the quality and volume of the motor can greatly improve the current flow capacity of the generator, enhance the winding strength and impact resistance, reduce the loss and heat generation, reduce the quality of the motor, and obtain a higher power density.

Description of drawings

FIG. 1 is a structural diagram of the radial coaxial integrated high power density inertial energy storage pulse power system according to the first embodiment.

Detailed ways

Embodiment 1: Referring to FIG. 1, this embodiment will be described in detail. The radial coaxial integrated high power density inertial energy storage pulse power supply system described in this embodiment includes an outer stator, an inner stator and a rotor,

The inner stator, the rotor and the outer stator are coaxially nested from the inside to the outside, there is an air gap between the inner stator and the rotor, and an air gap between the outer stator and the rotor;

The inner stator includes a motor stator fixed shaft 1, a motor stator back yoke 2, a motor laminated stator iron core 3 and a motor armature winding 4,

The rotor includes a carbon fiber support body 5 inside the rotor and a plurality of permanent magnets 7,

The motor stator back yoke 2 is fixed on the outer circumferential surface of the motor stator fixed shaft 1. The outer circumferential surface of the motor stator back yoke 2 is covered with a motor laminated stator iron core 3, and the outer surface of the motor laminated stator iron core 3 is along the circumference. A plurality of teeth are evenly arranged in the direction, and the motor armature winding 4 is wound on the teeth. A plurality of permanent magnets 7 are evenly distributed along the circumferential direction, and the polarities of two adjacent permanent magnets 7 are opposite;

The outer stator includes a generator carbon fiber support body 10, a generator armature winding 11 and a generator stator yoke 12,

The generator carbon fiber support body 10 is sleeved on the outer circumferential surface of the plurality of permanent magnets 7 at the same time, and the outer surface of the generator carbon fiber support body 10 is evenly provided with a plurality of supporting teeth along the circumferential direction, and the generator armature windings are wound on the supporting teeth. 11. The generator stator yoke 12 is sleeved outside the generator armature winding 11;

Both the motor armature winding 4 and the generator armature winding 11 are made of copper-based carbon nanotube wires.

In this embodiment, the armature windings on the generator and the motor of the present application all use copper-based carbon nanotube wires, which fundamentally reduces the winding loss and reduces the heating of the windings.

Embodiment 2: This embodiment further describes the radial coaxial integrated high-power density inertial energy storage pulse power supply system described in Embodiment 1. In this embodiment, the rotor further includes a permanent magnet interpole filler 6,

The space between two adjacent permanent magnets 7 is filled with fillers 6 between the permanent magnets.

Embodiment 3: This embodiment further describes the radial coaxial integrated high power density inertial energy storage pulse power system described in Embodiment 1. In this embodiment, the rotor further includes a compensation cylinder 8 and an outer side of the rotor. carbon fiber straps 9,

Between the permanent magnet 7 and the generator carbon fiber support body 10 , a compensation cylinder 8 and a carbon fiber strap 9 on the outside of the rotor are arranged, and the carbon fiber strap 9 on the outer side of the rotor is sleeved on the outer circumferential surface of the compensation cylinder 8 .

Embodiment 4: This embodiment further describes the radial coaxial integrated high power density inertial energy storage pulse power system described in Embodiment 1. In this embodiment, the system further includes a housing 13,

The casing 13 is sleeved on the outer circumferential surface of the generator stator yoke 12 .

Embodiment 5: This embodiment further describes the radial coaxial integrated high power density inertial energy storage pulse power supply system described in Embodiment 1. In this embodiment, the generator armature winding 11 includes an A-phase power supply. The armature winding 11-1 and the B-phase armature winding 11-2, and the A-phase armature winding 11-1 and the B-phase armature winding 11-2 are arranged alternately.

How this application works:

The structure of the present application integrates the motor and the generator, and the motor and the generator share the same rotor and the same magnetic circuit. The inner side of the structure is the motor, and the outer side is the generator. Taking the four-pole three-phase permanent magnet synchronous motor and the four-pole two-phase permanent magnet compensated pulse generator as an example, the three-phase winding of the four-pole three-phase permanent magnet synchronous motor is applied by the frequency converter. The three-phase symmetrical current generates a rotating magnetic field, which interacts with the permanent magnet magnetic field on the rotor structure to make the rotor start to rotate; when the rotor accelerates to a certain speed, the inverter that supplies power to the three-phase windings in the motor is cut off (the rotor will be in inertial Continue to rotate under the action), trigger the armature winding discharge circuit in the four-pole two-phase permanent magnet compensation pulse generator, so as to discharge the pulse load; cut off the discharge circuit after a certain number of discharges, and then apply current to the three-phase windings in the motor , and then accelerate the rotor to achieve the rated speed requirement, and then the four-pole two-phase permanent magnet compensation pulse generator discharges to the pulse load, and so on. The structure shares a magnetic circuit, and the magnetic field circuit of the motor is: permanent magnet N pole→generator stator iron core→permanent magnet S pole→motor stator iron core→permanent magnet N pole.

The structure is to combine the motor, the generator and the copper-based carbon nanowires, and the motor and the generator are arranged coaxially and radially. The inner side is the motor and the outer side is the generator, sharing the same rotor structure and magnetic circuit. The outer parts are the motor stator-air gap-rotor-air gap-generator stator; the motor is energized to drive the rotor to rotate, and the back EMF is induced in the outer generator armature winding, and then the generator armature winding is connected to the pulse load to discharge.

Claims (5)

1. The radial coaxial integrated high-power-density inertial energy storage pulse power supply system is characterized by comprising an outer stator, an inner stator and a rotor,

the inner stator, the rotor and the outer stator are coaxially nested from inside to outside, an air gap exists between the inner stator and the rotor, and an air gap exists between the outer stator and the rotor;

the inner stator comprises a motor stator fixing shaft (1), a motor stator back yoke (2), a motor laminated stator core (3) and a motor armature winding (4),

the rotor comprises a rotor inner side carbon fiber support body (5) and a plurality of permanent magnets (7),

the motor stator back yoke (2) is fixed on the outer circumferential surface of the motor stator fixing shaft (1), a motor laminated stator core (3) is sleeved on the outer circumferential surface of the motor stator back yoke (2), a plurality of teeth are uniformly arranged on the outer surface of the motor laminated stator core (3) along the circumferential direction, motor armature windings (4) are wound on the teeth, a rotor inner side carbon fiber support body (5) is sleeved on the outer circumferential surface of the motor laminated stator core (3), a plurality of permanent magnets (7) are uniformly arranged on the outer circumferential surface of the rotor inner side carbon fiber support body (5) along the circumferential direction, and the polarities of two adjacent permanent magnets (7) are opposite;

the outer stator comprises a generator carbon fiber supporting body (10), a generator armature winding (11) and a generator stator yoke (12),

the generator carbon fiber support body (10) is sleeved on the outer circumferential surfaces of the permanent magnets (7) at the same time, a plurality of support teeth are uniformly arranged on the outer surface of the generator carbon fiber support body (10) along the circumferential direction, a generator armature winding (11) is wound on the support teeth, and a generator stator yoke (12) is sleeved outside the generator armature winding (11);

the motor armature winding (4) and the generator armature winding (11) are both made of copper-based carbon nanotube wires.

2. The radial coaxial integral high power density inertial energy storage pulse power system of claim 1, characterized in that the rotor further comprises permanent magnet interpolar fillers (6),

and the space between two adjacent permanent magnets (7) is filled with permanent magnet interpolar fillers (6).

3. The radial coaxial integrated high power density inertial energy storage pulse power supply system according to claim 1, characterized in that the rotor further comprises a compensation cylinder (8) and a rotor outer carbon fiber strap (9),

a compensation cylinder (8) and a rotor outer side carbon fiber binding band (9) are arranged between the permanent magnet (7) and the generator carbon fiber support body (10), and the rotor outer side carbon fiber binding band (9) is sleeved on the outer circumferential surface of the compensation cylinder (8).

4. The radial coaxial integral high power density inertial energy storage pulse power system of claim 1, further comprising a housing (13),

the outer casing (13) is sleeved on the outer circumferential surface of the generator stator yoke (12).

5. The radial coaxial integrated high power density inertial energy storage pulse power supply system according to claim 1, characterized in that the generator armature winding (11) comprises a-phase armature winding (11-1) and a B-phase armature winding (11-2), the a-phase armature winding (11-1) and the B-phase armature winding (11-2) being alternately arranged.

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