CN110588362B

CN110588362B - Electromagnetic transmitting device

Info

Publication number: CN110588362B
Application number: CN201910842738.5A
Authority: CN
Inventors: 李�杰; 崔鹏; 周丹峰; 余佩倡; 陈强; 郭昭宇
Original assignee: National University of Defense Technology
Current assignee: National University of Defense Technology
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-07-23
Anticipated expiration: 2039-09-06
Also published as: CN110588362A

Abstract

The invention relates to the technical field of electromagnetic emission, in particular to an electromagnetic emission device, which comprises a motor module and a control system module used for controlling the motor module, the motor module comprises a platform base, a support rail and a motor stator are arranged on the platform base, the motor stator is positioned at the inner side of the support track, the support track is provided with a rotor vehicle body which can move along the inner side of the support track under the drive of the motor stator, the supporting track is provided with a suspension track which can act with the rotor vehicle body to enable the rotor vehicle body to suspend, the suspension track comprises induction plates which are symmetrically arranged at two sides of the motor stator, when the rotor vehicle body moves to the suspension track, the induction plate is located between the support track and the rotor vehicle body, and the control system module is electrically connected with the motor stator. The invention has the characteristics of simple and compact structure, high magnetic field utilization rate and high traction efficiency.

Description

Electromagnetic transmitting device

Technical Field

The invention relates to the technical field of electromagnetic emission, in particular to an electromagnetic emission device.

Background

The electromagnetic emission technology is a brand-new emission technology, and can accelerate an object to a high emission speed by utilizing electromagnetic energy; the time required for electromagnetic emission technology is also very short, typically a few milliseconds to tens of milliseconds. Compared with the traditional chemical energy and mechanical energy emission technology, the electromagnetic energy emission technology has a series of advantages of high emission speed, good controllability, excellent performance, high emission efficiency and the like.

There are various kinds of electromagnetic emission technologies, and they can be classified into a guide rail type, a coil type, and a reconnection type according to different emission devices. The transmitting device of the guide rail type electromagnetic transmitter consists of a pair of parallel metal guide rails, a control switch, a high-power pulse power supply and an armature easy-to-shoot bullet, and can be understood as a single-turn linear motor; the launching device of the coil type electromagnetic launcher consists of an excitation power supply, a driving coil, a gun barrel, a projectile and other accessory components, and can be understood as a cylindrical motor; the main differences between the reconnection type electromagnetic transmitter and the common coil type electromagnetic transmitter are that the arrangement positions of the driving coil and the transmitting coil are different, the polarities are different, the materials of the seat selection emitters are different, and the working modes are different, and the reconnection type electromagnetic transmitter is a special coil type.

So far, the existing practical electromagnetic emission adopts a linear induction motor structure, the side effect is obvious, the speed is not high, and the loss is serious due to an iron core structure.

Disclosure of Invention

In view of the defects in the prior art, the invention provides an electromagnetic transmitting device, which solves the technical problems that the suspension structure is complex and the utilization rate of magnetic fields on two sides of a motor stator is low in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme that an electromagnetic launching device is provided, and the electromagnetic launching device comprises a motor module and a control system module used for controlling the motor module, wherein the motor module comprises a platform base, a support track and a motor stator are arranged on the platform base, the motor stator is positioned on the inner side of the support track, a rotor vehicle body capable of moving along the inner side of the support track through the driving of the motor stator is arranged on the support track, a suspension track capable of suspending the rotor vehicle body is arranged on the support track, the suspension track comprises induction plates symmetrically arranged on two sides of the motor stator, when the rotor vehicle body moves to the suspension track, the induction plates are positioned between the support track and the rotor vehicle body, and the control system module is electrically connected with the motor stator.

Preferably, the induction plate is four copper plates.

Preferably, the motor stator is formed by splicing a plurality of stator modules.

Preferably, the mover body comprises permanent magnets and prying bodies, the permanent magnets are arranged on two sides of the motor stator and are the same in size, the prying bodies are used for installing the permanent magnets, the permanent magnets are distributed symmetrically, and the two adjacent permanent magnets on the same side are opposite in magnetic arrangement.

Preferably, the outer side of the permanent magnet is provided with an aluminum alloy protective shell with the thickness of 1mm, and the box wall of the prying body is 1mm in thickness.

Preferably, one end of the support rail is provided with a buffer device.

Preferably, the control system module comprises a strong current circuit generating induction current to drive the motor to move, a weak current circuit acquiring and processing real-time data to generate a signal for controlling the motor to move, and a monitoring system monitoring the operation state of the motor, wherein the strong current circuit is electrically connected with the weak current circuit, and the weak current circuit is electrically connected with the monitoring system.

Preferably, the strong current circuit includes dc power supply, a charging capacitor for storing electric quantity, a charging resistor for limiting circuit current during charging, a main contactor for controlling the on-off of the weak current circuit, a reactor for suppressing inrush current, and a full-bridge chopper circuit for controlling motor output current, the power supply with the capacitor, the resistor, the main contactor, the reactor, and the full-bridge chopper circuit are all electrically connected.

Preferably, the weak current circuit is including setting up sampling module, sensor, FPGA chip and the control panel on same circuit board, the sensor is including the first current sensor who measures the direct current input total current, the second current sensor and the third current sensor who measure two way phase currents, the first voltage sensor who measures the direct current input voltage, the second voltage sensor and the third voltage sensor who measure two way looks voltage, the position sensor who measures motor running position and the force sensor who measures motor thrust, the sensor with the sampling module electricity is connected, the sampling module passes through the FPGA chip with the control panel electricity is connected.

Preferably, the monitoring system comprises an upper computer, a control panel and a monitoring interaction module, wherein the monitoring interaction module is in communication connection with the upper computer through the control panel to record, monitor and control the running state of the motor in real time.

Compared with the prior art, the invention has the following advantages:

1. the permanent magnet interacts with the induction plate and the motor stator, suspension, guidance and traction of the rotor car body are realized, the structure is simple and compact, and the magnetic field utilization rate is high;

2. on the basis of the original motor braking, the eddy current braking mode of the rotor vehicle body is added, so that the braking capability of the motor is greatly improved;

3. the motor running state is monitored by the monitoring interaction module, so that the motor running state monitoring system is high in operability and interface friendliness, and can record, monitor and control the motor running state intuitively and conveniently.

Drawings

Figure 1 is a schematic view of the structure of the present invention,

figure 2 is a top view of figure 1,

figure 3 is a sectional view of the mover carriage body of the present invention,

figure 4 is a schematic diagram of a single-sided winding of a stator module of the present invention,

FIG. 5 is a diagram of the operation of a strong electric circuit according to the present invention,

figure 6 is a working principle diagram of the weak current circuit control board of the invention,

FIG. 7 is a schematic diagram of a monitoring interaction module of the monitoring system of the present invention.

In the figure: 1. the magnetic levitation type magnetic levitation vehicle comprises a levitation track, 2 motor stators, 3 supporting tracks, 4 mover vehicle bodies, 5 buffering devices, 6 platform bases, 7 induction plates, 8 permanent magnets and 9 prying bodies.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, an electromagnetic transmitting device includes an electric machine module and a control system module for controlling the electric machine module, the motor module comprises a platform base 6, a support rail 3 and a motor stator 2 are arranged on the platform base 6, the motor stator 2 is positioned at the inner side of the support track 3, the support track 3 is provided with a rotor vehicle body 4 which can move along the inner side of the support track 3 under the drive of the motor stator 2, the supporting track 3 is provided with a suspension track 1 which can act with the rotor car body 4 to make the rotor car body 4 suspend, the suspension track 1 comprises induction plates 7 symmetrically arranged at two sides of the motor stator 2, when the rotor car body 4 moves to the suspension track 1, the induction plate 7 is located between the support track 3 and the rotor car body 4, and the control system module is electrically connected with the motor stator 2. In this embodiment, control system module can give motor stator 2 provides power supply, is used for making motor stator 2 produces three-phase alternating current, runner automobile body 4 with motor stator 2 interact is right runner automobile body 4 leads and pulls, runner automobile body 4 is through with set up in its both sides the mutual induction of tablet 7 has realized runner automobile body 4 is in electronic suspension and vortex braking on the suspension track 1 has simple structure, stable performance, and the high characteristics of magnetic field utilization ratio.

As shown in fig. 3, the induction plate 7 is four copper plates. In this embodiment, four induction plates 7 are symmetrically distributed on two sides of the motor stator 2, and the induction plates 7 interact with the permanent magnets 8 in the rotor body 4 to realize electric suspension and eddy current braking of the rotor body 4, so that the structure is simple, the performance is stable, and the braking capability of the motor is improved by increasing the eddy current braking mode.

As shown in fig. 1, 2, and 4, the motor stator 2 is formed by splicing a plurality of stator modules. In this embodiment, the stator module is a three-phase double-side winding, and the in-phase windings in the same side are connected in series (as shown in fig. 4 a)₁A₂、B₁B₂、C₁C₂All in series), between the stator modulesThe in-phase windings are connected in parallel (as A, B in fig. 4, the three-phase windings are connected in parallel with the three-phase windings C), and the long motor stator 2 formed by splicing a plurality of stator modules interacts with the rotor car body 4, so that traction on the rotor car body 4 is realized.

As shown in fig. 1, 2, and 3, the mover body 4 includes permanent magnets 8 with the same size and disposed on two sides of the motor stator 2, and a pry body 9 for mounting the permanent magnets 8, the permanent magnets 8 are four and symmetrically distributed, and the two adjacent permanent magnets 8 on the same side are oppositely arranged in magnetic manner. In this embodiment, two prying bodies 9 are disposed on two sides of the mover body 4, the permanent magnets 8 with the same size are installed in the prying bodies 9, the permanent magnets 8 placed in the prying bodies 9 adjacent to each other on the same side have opposite magnetism, and the permanent magnets 8 placed in the prying bodies 9 opposite to each other have the same magnetism.

As shown in fig. 1, 2, and 3, an aluminum alloy protective shell with a thickness of 1mm is disposed outside the permanent magnet 8, and the box wall of the pry body 9 has a thickness of 1 mm. In this embodiment, the thickness of the aluminum alloy protective casing outside the permanent magnet 8 and the thickness of the box wall of the pry body 9 are both 1mm, in other embodiments, as long as the strength of the casing or the box body is ensured to be sufficient, the thinner the thickness is, the better the thickness is, when the thickness is thinner, the smaller the gaps between the permanent magnet 8 and the motor stator 2 and between the permanent magnet 8 and the induction plate 7 are, and the larger the magnetic field force generated therebetween is.

As shown in fig. 1 and 2, the other end of the support rail 3 is provided with a buffer device 5. In this embodiment, the suspension rail 1 is disposed at one end of the support rail 3, the buffer device 5 is disposed at the other end of the support rail 3, and when the mover body 4 collides, the buffer device 5 can buffer and protect the mover body 4.

As shown in fig. 5 and 6, the control system module includes a strong current circuit generating an induced current to drive the motor to move, a weak current circuit collecting and processing real-time data to generate a signal for controlling the motor to move, and a monitoring system monitoring the operation state of the motor, wherein the strong current circuit is electrically connected with the weak current circuit, and the weak current circuit is electrically connected with the monitoring system. In this embodiment, the weak current circuit collects and processes real-time data and generates a signal for controlling current output of the three-phase circuit, and transmits a control signal to the strong current circuit through an optical fiber, and the strong current circuit generates an induced current according to the control signal to further control the motion of the permanent magnet synchronous motor; meanwhile, real-time data acquired and processed by the weak current circuit are transmitted to the monitoring system through a network cable, so that the monitoring system records and monitors the running state of the permanent magnet synchronous motor in real time through a monitoring interaction module of an upper computer.

As shown in fig. 5, the strong current circuit includes a dc power supply, a capacitor for storing electric quantity, a resistor for limiting a current of the circuit during charging, a main contactor for controlling on/off of the weak current circuit, a reactor for suppressing an inrush current, and a full-bridge chopper circuit for controlling an output current of the motor, and the power supply is electrically connected to the capacitor, the resistor, the main contactor, the reactor, and the full-bridge chopper circuit. In this specific embodiment, when the precharge switch KM1 is closed, the dc power supply with a rated input voltage of 330V charges the capacitors (E1 to E10) through the current limiting of the resistors (R1 and R2), after the voltages at the two ends of the capacitors (E1 to E10) reach a certain degree, the main contactor KM2 is closed, at this time, the resistors (R1 and R2) are disconnected, the voltages of the capacitors (E1 to E10) reach the voltage of the dc power supply and start discharging, and the control board controls the connection or disconnection of the V1 to V6 by outputting PWM waves with different duty ratios to control the output of the full-bridge chopper circuit, thereby realizing the control of the three-phase output current and the direction of the motor, and driving the motor to operate by synthesizing sinusoidal current.

As shown in fig. 6 and 7, the weak current circuit includes a sampling module, a sensor and a control board which are arranged on the same circuit board, the sensor includes a first current sensor for measuring a total current of the direct current input, a second current sensor and a third current sensor for measuring two phase currents, a first voltage sensor for measuring a voltage of the direct current input, a second voltage sensor and a third voltage sensor for measuring two phase voltages, a position sensor for measuring an operation position of the motor, and a force sensor for measuring a thrust of the motor, and the sensor is electrically connected to the control board through the sampling module. In this concrete embodiment, classic motor control chip 28335DSP is selected for use to the control panel, 16 AD7606 chips of high accuracy are selected to the sampling module, be equipped with the FPGA chip in the control panel, main contactor state signal passes through the FPGA chip transmits extremely the control panel, control panel control the sampling module samples motor real-time status information, eight ways the data signal that the sensor was gathered is through analog circuit filtering amplification back, and pass through the FPGA chip transmit to in the control panel 28335DSP, process the core control algorithm of control panel 28335DSP calculates the back output PWM ripples, thereby the drive full-bridge chopper circuit in the forceful electric power circuit controls the output of three-phase circuit current, has realized right the real-time control of motor. In the specific embodiment, the number of the IO ports is increased by the FPGA chip, and meanwhile, the data computing capacity and the data processing capacity of the system are also enhanced; it is worth mentioning that because the sensor signals are more, and the sampling channel of the motor control board is limited, only two-phase current and two-phase voltage sensors are arranged, and the current and the voltage of the third phase are calculated through kirchhoff's law.

As shown in fig. 7, the monitoring system comprises an upper computer, a control panel and a monitoring interaction module, wherein the monitoring interaction module is in communication connection with the upper computer through the control panel to record, monitor and control the running state of the motor in real time. In the embodiment, the monitoring system is based on data communication between an upper computer (such as a computer) and a control panel, and realizes real-time monitoring and control of the motor through an upper computer monitoring interaction module, the communication module adopts an SPI communication interface of a 28335DSP, an ENC28J60QFN network communication chip is used as an intermediary to realize an SPI port to an internet port of the DSP, and a UDP communication protocol is adopted to realize data communication between the main control panel and the upper computer, wherein control data of the upper computer and the driver state of the lower computer and data in the motor operation process are interacted in a compression transmission decompression and decompression mode, and the interaction mode can ensure the integrity of the data under the limited transmission speed; the monitoring interaction module realizes data communication between an upper computer and a control panel by setting a fixed IP, and comprises a real-time uploading area, a functional area and a parameter setting area, wherein the real-time uploading area comprises data values of a motor running position (displacement P1), a phase current (C1), C phase current (C2), input total voltage (P2), ab phase voltage (a1, a2), motor fault signals (error1 and error2) and the like uploaded by the control panel in real time; the functional area comprises control PWM wave on-off buttons (PWM-on and PWM-off) and a motor automatic reset button (back is 3); the parameter setting area comprises data values such as a current loop expected current value, a current loop proportionality coefficient, a speed upper limit (speedmax) and a distance limit (limsped) in the motor operation process. The real-time running state of the motor can be mastered in real time through the corresponding data of the monitoring interaction module, and meanwhile, the stored corresponding data can be conveniently processed in the later period.

The above embodiments are merely illustrative, and not restrictive, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, and therefore all equivalent technical solutions are intended to be included within the scope of the invention.

Claims

1. The electromagnetic emission experiment platform is characterized by comprising a motor module and a control system module used for controlling the motor module, wherein the motor module comprises a platform base (6), a support track (3) and a motor stator (2) are arranged on the platform base (6), the motor stator (2) is positioned on the inner side of the support track (3), a rotor vehicle body (4) capable of moving along the inner side of the support track (3) is arranged on the support track (3) in a driving way through the motor stator (2), a suspension track (1) capable of suspending the rotor vehicle body (4) under the action of the rotor vehicle body (4) is arranged on the support track (3), the suspension track (1) comprises induction plates (7) symmetrically arranged on two sides of the motor stator (2), and when the rotor vehicle body (4) moves to the suspension track (1), the induction plate (7) is positioned between the support rail (3) and the rotor vehicle body (4), the control system module is electrically connected with the motor stator (2), the rotor vehicle body (4) comprises permanent magnets (8) which are arranged on two sides of the motor stator (2) and have the same size and a prying body (9) for installing the permanent magnets (8), the permanent magnets (8) are symmetrically distributed, two adjacent permanent magnets (8) on the same side are oppositely arranged in a magnetic manner, the rotor vehicle body (4) is guided and pulled through the interaction of the rotor vehicle body (4) and the motor stator (2), and the electric suspension and eddy current braking of the rotor vehicle body (4) on the suspension rail (1) are realized through the mutual induction of the rotor vehicle body (4) and the induction plate (7) arranged on two sides of the rotor vehicle body;

the control system module comprises a strong current circuit, a weak current circuit and a monitoring system, wherein the strong current circuit generates induction current to drive the motor to move, the weak current circuit acquires and processes real-time data to generate a signal for controlling the motor to move, and the monitoring system monitors the running state of the motor;

the strong current circuit comprises a direct current power supply, a capacitor for storing electric quantity, a resistor for limiting circuit current during charging, a main contactor for controlling the on-off of the weak current circuit, a reactor for inhibiting inrush current and a full-bridge chopper circuit for controlling the output current of the motor, wherein the power supply is electrically connected with the capacitor, the resistor, the main contactor, the reactor and the full-bridge chopper circuit;

the weak current circuit comprises a sampling module, a sensor, an FPGA chip and a control panel which are arranged on the same circuit board, wherein the sensor comprises a first current sensor for measuring the total direct current input current, a second current sensor and a third current sensor for measuring two phase currents, a first voltage sensor for measuring the direct current input voltage, a second voltage sensor and a third voltage sensor for measuring two phase voltages, a position sensor for measuring the running position of a motor and a force sensor for measuring the thrust of the motor;

the monitoring system comprises an upper computer, a control panel and a monitoring interaction module, wherein the monitoring interaction module is in communication connection with the upper computer through the control panel to realize real-time recording, monitoring and control of the running state of the motor.

2. The electromagnetic emission experimental platform of claim 1, characterized in that the induction plate (7) is four copper plates.

3. The electromagnetic emission experiment platform of claim 2, wherein the motor stator (2) is formed by splicing a plurality of stator modules.

4. The electromagnetic emission experiment platform of claim 3, wherein an aluminum alloy protective shell with the thickness of 1mm is arranged on the outer side of the permanent magnet (8), and the box wall of the pry body (9) has the thickness of 1 mm.

5. The electromagnetic emission experiment platform of claim 1, wherein one end of the support rail (3) is provided with a buffer device (5).