阅读说明：本技术 一种超导磁通切换直线电机驱动的轨道交通列车系统 (Rail transit train system driven by superconducting magnetic flux switching linear motor ) 是由 曹瑞武 陆鸣航 沈丹妮 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种超导磁通切换直线电机驱动的轨道交通列车系统,包括供电子系统,列车车体、牵引驱动子系统以及列车轨道子系统。所述牵引子系统包括电机单元、逆变单元、位置检测单元、制冷单元及电机控制单元。列车轨道子系统可分为轮轨式与磁悬浮式,轮轨式列车轨道子系统包括导轨、列车车轮与转向架,磁悬浮式列车轨道子系统包括永磁轨道或电励磁轨道,以及悬浮超导单元。本发明采用超导直线电机驱动,具有推力大、效率高、功率因数高、次级结构简单可靠、成本较低以及调速范围宽的优点；此外本发明可采用轮轨式或磁悬浮式轨道,特别适合于中高速运行场合。(The invention discloses a rail transit train system driven by a superconducting flux switching linear motor. The traction subsystem comprises a motor unit, an inversion unit, a position detection unit, a refrigeration unit and a motor control unit. The train track subsystem can be divided into a wheel track type train track subsystem and a magnetic suspension type train track subsystem, wherein the wheel track type train track subsystem comprises a guide rail, train wheels and a bogie, and the magnetic suspension type train track subsystem comprises a permanent magnet track or an electric excitation track and a suspension superconducting unit. The invention adopts the superconducting linear motor to drive, and has the advantages of large thrust, high efficiency, high power factor, simple and reliable secondary structure, lower cost and wide speed regulation range; in addition, the invention can adopt a wheel track type or magnetic suspension type track, and is particularly suitable for medium-high speed running occasions.)

1. A rail transit train system driven by a superconducting magnetic flux switching linear motor comprises a power supply subsystem (1), a train body (2), a traction drive subsystem (3) and a train rail subsystem (4),

the power supply subsystem (1) rectifies alternating current provided by a power grid into direct current, and provides the direct current for the train body (2) and the traction drive subsystem (3);

the train body (2) comprises a plurality of train carriages (20), train carriage direct current electric equipment (21) and train carriage alternating current electric equipment (22);

the traction subsystem (3) comprises a motor unit (30), an inverter unit (31), a position detection unit (32), a refrigeration unit (33) and a motor control unit (34).

2. A superconducting flux switching linear motor driven rail transit train system according to claim 1, wherein in the traction drive subsystem (3):

the motor unit (30) comprises a plurality of superconducting magnetic flux switching linear motors, and each superconducting magnetic flux switching linear motor comprises a primary (300) and a secondary (301), wherein the primary (300) is fixed below the train body (2), and the secondary (301) is laid along a track;

the system comprises an inverter unit (31), a motor unit (30), a position detection unit (32), a refrigeration unit (33), a motor control unit (34) and train carriage alternating current electric equipment (22), wherein the inverter unit (31) is arranged in a train body (2) and inverts direct current provided by the power supply subsystem (1) into three symmetrical alternating currents;

the position detection unit (32) obtains a position signal reflecting the position of the current superconducting magnetic flux switching linear motor through a sensor and provides the position signal to the motor control unit (34);

the refrigerating unit (33) is arranged in the vehicle body (2), comprises a plurality of refrigerating machines and is connected with the primary stage (300) to maintain the temperature required by superconduction;

the motor control unit (34) is installed in the vehicle body (2) and used for controlling the motor unit (30).

3. A superconducting flux switching linear motor driven rail transit train system according to claim 2, wherein in the motor unit (30):

the primary (300) comprises a primary iron core (3000), an armature winding (3001), a superconducting field winding (3002) and a Dewar device (3003);

the superconducting magnet coil (3002) is placed in a plurality of dewar assemblies (3003) individually, or the entire primary (300) is placed in one dewar assembly (3003);

the secondary (301) is a slotted structure (3010) or a segmented structure (3011).

4. A superconducting magnetic flux switching linear motor driven rail transit train system according to any one of claims 1 to 3,

the sensor of the position detection unit (32) is a position sensor (320), or a position-free sensor (321) based on current and voltage signals, or a speed sensor (322) mounted on a wheel;

the position sensor (320) is divided into a position signal generator (3200) and a position signal detector (3201), the position signal generator (3200) is installed on a train plate below the train body (2), and the position signal detector (3201) is laid along a track;

the position-free sensor (321) based on the current and voltage signals is arranged on a train body (2), measures the current and voltage signals of the armature winding (3001) in the primary (300), and provides the current and voltage signals for the motor unit (30) to calculate and obtain the position signals.

5. A superconducting magnetic flux switching linear motor driven rail transit train system according to any one of claims 1 to 4,

the train track subsystem (4) is a wheel track type train track subsystem (40) or a magnetic suspension type train track subsystem (41);

the wheel-rail train track subsystem (40) comprises a guide rail (400), train wheels (401) and a bogie (402);

the magnetic suspension type train track subsystem (41) comprises a permanent magnet track (410) or an electrically excited track (411) and a suspension superconducting unit (412);

the permanent magnet track (410) comprises a plurality of permanent magnets (4100) which are laid along the track and have the same magnetic field direction;

the electrically excited rail (411) comprises a plurality of direct current coils (4110) which are laid along the rail and have the same magnetic field direction;

the suspension superconducting unit (412) comprises a plurality of superconducting coils (4120) arranged below the train body (2) and a Dewar device (4121) for the suspension superconducting unit, and the superconducting coils (4120) are arranged in the Dewar device (4121) for the suspension superconducting unit.

Technical Field

The invention relates to a track traffic traction system based on superconducting magnetic flux switching linear motor driving, and belongs to the technical field of vehicles.

Background

In the process of urbanization, rail transit systems play an indispensable role. Conventional train systems are driven by rotating electric machine traction systems. The rotating motor converts the rotating torque into adhesive traction force by means of a mechanical transmission device, so that the loss is large and the efficiency is low. In addition, the adhesive traction force is affected by the track condition, the friction coefficient and other factors, so that the provided traction force is not ideal enough, the climbing capability and the turning capability of a train system are not enough, a tunnel needs to be additionally excavated, and an viaduct is supposed, so that certain difficulty is brought to road planning, and the cost is increased.

Compared with a rail transit train system based on a rotating electric machine, the train system based on linear motor driving directly generates electromagnetic force by the electric machine. The electromagnetic force is non-adhesive traction force, the influence of the rail condition is avoided, and meanwhile, the linear motor does not need a mechanical transmission device, so that the train system driven by the linear motor has the advantages of small volume and high power density, the volume of the train system can be reduced, the cost of tunnel excavation is reduced, and meanwhile, road planning is simplified, so that the train system driven by the linear motor has bright application prospect in the field of rail transit.

At present, track traffic train systems driven by linear motors are adopted in track traffic occasions such as Guangzhou No. four lines, No. five lines, capital airport lines and the like in China. The secondary of the linear induction motor for driving is only composed of an induction plate and a magnetic conduction plate, the structure is simple, the size is small, the cost is low, and meanwhile, the output traction force is larger than that of the rotating motor. However, the linear induction motor has high eddy current loss, low efficiency and power factor, and in addition, the control of the linear induction motor is complex, so the long-term operation cost and the system cost are high.

The efficiency, the power factor and the power density of a rail transit train system driven by the traditional permanent magnet linear synchronous motor are high; however, the permanent magnet of the traction motor is arranged on the secondary side and paved along a track, the secondary side has high cost and large positioning force, and meanwhile, the traditional permanent magnet motor has poor weak magnetic performance, is difficult to realize constant power control at high speed and has a limited speed regulation range, so the defects greatly limit the application of the traction motor in the long-stroke field.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a rail transit train system driven by a superconducting magnetic flux switching linear motor, which adopts a superconducting coil for excitation, can improve the traction output of the train system and has good power factor, efficiency and speed regulation performance. And the system has lower cost and simple and reliable secondary structure of the driving motor. In addition, besides the traditional wheel-rail type structure, the invention can also adopt a superconducting magnetic suspension type structure, thereby further reducing the running resistance and increasing the speed.

The invention provides a rail transit train system driven by a superconducting flux switching linear motor, which comprises a power supply subsystem 1, a train body 2, a traction drive subsystem 3 and a train rail subsystem 4;

the power supply subsystem 1 rectifies alternating current provided by a power grid into direct current, and provides the direct current for the train body 2 and the traction drive subsystem 3;

the train body 2 comprises a plurality of train carriages 20, train carriage direct current electric equipment 21 and train carriage alternating current electric equipment 22;

the traction subsystem 3 comprises a motor unit 30, an inverter unit 31, a position detection unit 32, a refrigeration unit 33 and a motor control unit 34.

Further, in the traction drive subsystem 3:

the motor unit 30 includes a plurality of superconducting flux switching linear motors, and each superconducting flux switching linear motor includes a primary 300 fixed below the train body 2 and a secondary 301 laid along a rail;

the inverter unit 31 is installed in the train body 2, inverts the direct current provided by the power supply subsystem 1 into three symmetrical alternating currents, and provides the three symmetrical alternating currents for the motor unit 30, the position detection unit 32, the refrigeration unit 33, the motor control unit 34 and the train carriage alternating current electric equipment 22;

the position detection unit 32 obtains a position signal reflecting the position of the current superconducting magnetic flux switching linear motor through a sensor, and provides the position signal to the motor control unit 34;

the refrigerating unit 33 is arranged in the vehicle body 2 and comprises a plurality of refrigerating machines which are connected with the primary 300 so as to maintain the temperature required by superconduction;

the motor control unit 34 is installed in the vehicle body 2 for controlling the motor unit 30.

Further, in the motor unit 30:

the primary 300 includes a primary core 3000, an armature winding 3001, a superconducting field winding 3002, and a dewar apparatus 3003;

said superconducting field coil 3002 is placed in a plurality of dewar assemblies 3003 individually, or the entire primary 300 is placed in one dewar assembly 3003;

the secondary 301 is a slotted structure 3010 or a segmented structure 3011.

Preferably, the sensor of the position detecting unit 32 is a position sensor 320, or a non-position sensor 321 based on current and voltage signals, or a speed sensor 322 mounted on a wheel;

the position sensor 320 is divided into a position signal generator 3200 and a position signal detector 3201, the position signal generator 3200 is mounted on a train plate below the train body 2, and the position signal detector 3201 is laid along a rail;

the position-less sensor 321 based on the current and voltage signals is disposed on the train body 2, measures the current and voltage signals of the armature winding 3001 in the primary 300, and provides the measured current and voltage signals to the motor unit 30 to calculate and obtain the position signal.

Preferably, the train track subsystem 4 is a wheel track type train track subsystem 40 or a magnetic suspension type train track subsystem 41;

the wheel-track train rail subsystem 40 comprises a guide rail 400, train wheels 401 and a bogie 402;

the magnetic suspension type train track subsystem 41 comprises a permanent magnet track 410 or an electrically excited track 411 and a suspension superconducting unit 412;

the permanent magnet track 410 comprises a plurality of permanent magnets 4100 which are laid along the track and have the same magnetic field direction;

the electrically excited rail 411 comprises a plurality of direct current coils 4110 laid along the rail and having the same magnetic field direction;

the suspension superconducting unit 412 includes a plurality of superconducting coils 4120 installed below the train body 2 and a dewar device 4121 for the suspension superconducting unit, and the superconducting coils 4120 are provided in the dewar device 4121 for the suspension superconducting unit.

The motor mainly has the following advantages:

according to the rail transit train system driven by the superconducting magnetic flux switching linear motor, the superconducting magnetic flux switching linear motor is adopted, so that the power density can be effectively improved, and the rail transit train system has the advantages of high efficiency, high power factor, easiness in speed regulation and lower cost. In addition, aiming at different speed requirements, the invention provides a traditional wheel-rail type structure and a superconducting magnetic suspension structure, so that the invention is particularly suitable for medium-high speed operation occasions.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a schematic view of the system as a whole;

FIG. 2 is a schematic diagram of system power supply;

FIG. 3 is a schematic diagram of a maglev train track subsystem (employing position-less sensors based on current and voltage signals);

FIG. 4 is a detailed schematic view of a magnetic levitation type train track subsystem (permanent magnet track);

FIG. 5 is a detailed schematic view of a magnetically levitated train track subsystem (electrically excited track);

fig. 6 is a schematic view of a motor unit (secondary segmented structure);

fig. 7 is a schematic view of the motor unit (secondary slot configuration);

FIG. 8 is a schematic view of a wheel track train rail subsystem (employing position sensors);

FIG. 9 is a schematic view of a wheel track train rail subsystem (employing speed sensors);

wherein, 1-a power supply subsystem, 2-a train body, 3-a traction drive subsystem, 4-a train track subsystem, 20-a train carriage, 21-a train carriage direct current power utilization device, 22-a train carriage alternating current power utilization device, 30-a motor unit, 31-an inverter unit, 32-a position detection unit, 33-a refrigeration unit, 34-a motor control unit, 40-a wheel track type sub-train track subsystem, 41-a magnetic suspension type train track subsystem, 300-a primary, 301-a secondary, 320-a position sensor, 321-a non-position sensor based on current and voltage signals, 322-a speed sensor, 400-a guide rail, 401-a train wheel, 402-a bogie, 410-a permanent magnet track, 411-an electrically excited track, 412-suspension superconducting unit, 3000-primary iron core, 3001-armature winding, 3002-superconducting excitation winding, 3003-Dewar device, 3010-tooth slot type structure, 3011-block type structure, 3200-position signal generator, 3201-position signal detector, 4100-permanent magnet, 4110-direct current coil, 4120-superconducting coil and 4121-Dewar device for suspension superconducting unit.

Detailed Description

The invention provides a track traffic train system driven by a superconducting magnetic flux switching linear motor, which is further described in detail by referring to the attached drawings and examples in order to make the purposes, technical schemes and effects of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a rail transit train system driven by a superconducting flux switching linear motor, which comprises a power supply subsystem 1, a train body 2, a traction drive subsystem 3 and a train rail subsystem 4;

the power supply subsystem 1 rectifies alternating current provided by a power grid into direct current, and provides the direct current for the train body 2 and the traction drive subsystem 3;

the train body 2 comprises a plurality of train carriages 20, train carriage direct current electric equipment 21 and train carriage alternating current electric equipment 22;

the traction subsystem 3 comprises a motor unit 30, an inverter unit 31, a position detection unit 32, a refrigeration unit 33 and a motor control unit 34.

Further, in the traction drive subsystem 3:

the motor unit 30 includes a plurality of superconducting flux switching linear motors, and each superconducting flux switching linear motor includes a primary 300 fixed below the train body 2 and a secondary 301 laid along a rail;

the inverter unit 31 is installed in the train body 2, inverts the direct current provided by the power supply subsystem 1 into three symmetrical alternating currents, and provides the three symmetrical alternating currents for the motor unit 30, the position detection unit 32, the refrigeration unit 33, the motor control unit 34 and the train carriage alternating current electric equipment 22;

the position detection unit 32 obtains a position signal reflecting the position of the current superconducting magnetic flux switching linear motor through a sensor, and provides the position signal to the motor control unit 34;

the refrigerating unit 33 is arranged in the vehicle body 2 and comprises a plurality of refrigerating machines which are connected with the primary 300 so as to maintain the temperature required by superconduction;

the motor control unit 34 is installed in the vehicle body 2 for controlling the motor unit 30.

Further, in the motor unit 30:

the primary 300 includes a primary core 3000, an armature winding 3001, a superconducting field winding 3002, and a dewar apparatus 3003;

said superconducting field coil 3002 is placed in a plurality of dewar assemblies 3003 individually, or the entire primary 300 is placed in one dewar assembly 3003;

the secondary 301 is a slotted structure 3010 or a segmented structure 3011.

Preferably, the sensor of the position detecting unit 32 is a position sensor 320, or a non-position sensor 321 based on current and voltage signals, or a speed sensor 322 mounted on a wheel;

the position sensor 320 is divided into a position signal generator 3200 and a position signal detector 3201, the position signal generator 3200 is mounted on a train plate below the train body 2, and the position signal detector 3201 is laid along a rail;

the position-less sensor 321 based on the current and voltage signals is disposed on the train body 2, measures the current and voltage signals of the armature winding 3001 in the primary 300, and provides the measured current and voltage signals to the motor unit 30 to calculate and obtain the position signal.

Preferably, the train track subsystem 4 is a wheel track type train track subsystem 40 or a magnetic suspension type train track subsystem 41;

the wheel-track train rail subsystem 40 comprises a guide rail 400, train wheels 401 and a bogie 402;

the magnetic suspension type train track subsystem 41 comprises a permanent magnet track 410 or an electrically excited track 411 and a suspension superconducting unit 412;

the permanent magnet track 410 comprises a plurality of permanent magnets 4100 which are laid along the track and have the same magnetic field direction;

the electrically excited rail 411 comprises a plurality of direct current coils 4110 laid along the rail and having the same magnetic field direction;

the suspension superconducting unit 412 includes a plurality of superconducting coils 4120 installed below the train body 2 and a dewar device 4121 for the suspension superconducting unit, and the superconducting coils 4120 are provided in the dewar device 4121 for the suspension superconducting unit.