CN213906503U

CN213906503U - Train traction transmission control device for experimental development

Info

Publication number: CN213906503U
Application number: CN202120031405.7U
Authority: CN
Inventors: 刘潇潇; 周锦祥; 李涛; 梁玉泽; 陆福德; 徐锦龙
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-08-06
Anticipated expiration: 2031-01-06

Abstract

The utility model discloses a train traction drive control device for experimental development, include: the control circuit takes a DSP controller as a core and realizes control over a main circuit inversion unit through a PWM driving circuit so as to realize control over the three-phase alternating-current traction motor; the utility model relates to a train traction drive control device makes full use of DSP chip peripheral hardware's function for experimental development realizes functions such as multichannel AD collection, multiple data communication, speed closed-loop control, control software development, PWM drive control, has certain using value to research train traction drive control theory, development advanced control technique.

Description

Train traction transmission control device for experimental development

Technical Field

The utility model relates to a train control technical field, concretely relates to train traction drive control device for experimental development.

Background

The train traction transmission control technology is one of the key technologies of modern high-speed railways, and by combining the current advanced control theory and control method, the deep research on the structure and control strategy of the existing traction transmission system is a necessary way for developing and researching a high-performance high-speed motor train unit strategy with completely independent intellectual property rights, and is also a key step for promoting the Chinese high-speed motor train unit to go out of the strategy. Therefore, it is necessary to develop a train traction drive control device for experimental development.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a train traction drive control device for experimental development can provide functions such as communication, multichannel AD collection input, data storage and programmable interface on satisfying the basis of current train traction drive control function for train traction drive control mechanism research and advanced control technology research and development.

In order to solve the above problem, the utility model provides a following technical scheme:

a train traction drive control device for experimental development comprises: the system comprises a main circuit, a three-phase alternating-current traction motor and a control circuit; the method is characterized in that:

the main circuit consists of a rectifying unit, an intermediate direct-current link and an inverting unit, wherein the rectifying unit is electrically connected with the intermediate direct-current link, and the intermediate direct-current link is electrically connected with the inverting unit; the control circuit includes: the device comprises a DSP controller, a PWM (pulse-width modulation) driving circuit, a switching power supply, an encoder, a shaping circuit, a data storage unit, a JTAG (joint test action group) interface circuit, a CAN (controller area network) interface circuit, an RS485 interface circuit, an RS232 interface circuit, a multi-path A/D (analog/digital) sampling circuit and an extended I/O (input/output) interface circuit, wherein the DSP controller is respectively electrically connected with the PWM driving circuit, the switching power supply, the shaping circuit, the data storage unit, the JTAG interface circuit, the CAN interface circuit, the RS485 interface circuit, the RS232 interface circuit, the multi-path A/D sampling circuit and the extended I/O interface circuit, and the shaping circuit is electrically connected with the encoder; the PWM driving circuit is electrically connected with the inverter unit; the encoder is arranged at the shaft end of the three-phase alternating-current traction motor.

The DSP controller comprises a DSP chip and a chip peripheral circuit, wherein the chip peripheral circuit comprises: the power supply circuit, the WATHCHDOG watchdog circuit, the reset circuit, the clock circuit and the crystal oscillator.

The DSP controller is electrically connected with the simulator through a JTAG interface circuit, and the simulator is connected with a computer; the DSP chip programming software CCS can write a control program to be led into the DSP controller, and the digital realization of the advanced algorithm is realized.

The CAN interface circuit, the RS485 interface circuit and the RS232 interface circuit are connected with a peripheral communication module of the DSP controller, CAN be used for three communication modes and are connected with equipment such as an upper computer, and the communication experiment function of the device is improved.

The multi-channel A/D sampling circuit can be connected with various sensors, collects analog quantities such as current, voltage and temperature, and improves the function of a collection end of the device.

The expansion I/O interface circuit expands the original I/O port of the DSP, and adds an input/output interface of the device for digital logic control.

And the encoder signal passes through the shaping circuit and then is accessed to an orthogonal encoding module eQEP of the DSP controller, and the orthogonal encoding module eQEP is used for acquiring the rotating speed and the rotating direction of the three-phase alternating-current traction motor.

The DSP chip comprises 6 PWM channels, is electrically connected with the inverter unit after being connected with the PWM driving circuit, and realizes the control of the inverter unit.

The data storage unit is an externally expanded EEPROM of a DSP serial peripheral interface to finish the storage of system parameters.

Compared with the prior art, the utility model has the characteristics of it is following:

1. an I/O interface, multi-path A/D acquisition and various communication interfaces are added, and the functions of the experimental development device are increased.

2. The peripheral functions of the DSP chip are fully utilized, the structure of the device is simplified, and the efficiency and accuracy of acquisition, operation and output are improved.

3. And a programmable program interface is reserved for software development, and research and development experiments of advanced control theory are realized.

Drawings

FIG. 1 is a schematic block diagram of the device architecture;

FIG. 2 is a block diagram of a control circuit according to an embodiment.

Reference numbers in the figures: 1. a main circuit; 2. a rectifying unit; 3. an intermediate direct current link; 4. an inversion unit; 5. a three-phase AC traction motor; 6. a PWM drive circuit; 7. a switching power supply; 8. an encoder; 9. a data storage unit; 10. a JTAG interface circuit; 11. a shaping circuit; 12. a DSP controller; 13. a CAN interface circuit; 14. an RS485 interface circuit; 15. an RS232 interface circuit; 16. a plurality of A/D sampling circuits; 17. an extended I/O interface circuit; 18. a control circuit; 19. an upper computer; 20. a voltage AD sampling circuit; 21. current AD sampling circuit.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the present embodiment is designed for the most common ac-dc-ac transmission system of a modern train, and the main circuit is divided into a rectification unit, an intermediate dc link, and an inverter unit.

As shown in fig. 2, the encoder is connected to an orthogonal encoding module eQEP of the DSP controller through a shaping circuit, and is used to acquire the speed and direction of the three-phase ac traction motor, so as to form a speed closed-loop control.

As shown in fig. 2, the voltage and current of the system are sent to the ADC module of the DSP controller after passing through the voltage AD sampling circuit and the current AD sampling circuit, and the sampling result is obtained for system control and parameter display; the upper computer is communicated with the DSP controller through an RS232 interface circuit, and parameters such as system voltage, current, rotating speed and the like are displayed in real time; 6 PWM channels of the DSP controller control the on-off of a switch tube of the inversion unit after passing through the PWM driving circuit, and voltage space vector modulation technology is used for realizing variable voltage and variable frequency control.

The above embodiments are merely exemplary embodiments of the present invention, and not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A train traction drive control device for experimental development comprises: the traction control system comprises a main circuit (1), a three-phase alternating-current traction motor (5) and a control circuit (18); the method is characterized in that: the main circuit (1) consists of a rectifying unit (2), an intermediate direct current link (3) and an inversion unit (4), wherein the rectifying unit (2) is electrically connected with the intermediate direct current link (3), and the intermediate direct current link (3) is electrically connected with the inversion unit (4); the control circuit (18) comprises: the device comprises a DSP controller (12), a PWM (pulse-width modulation) driving circuit (6), a switching power supply (7), an encoder (8), a shaping circuit (11), a data storage unit (9), a JTAG interface circuit (10), a CAN interface circuit (13), an RS485 interface circuit (14), an RS232 interface circuit (15), a multi-path A/D sampling circuit (16) and an extended I/O interface circuit (17), wherein the DSP controller (12) is respectively electrically connected with the PWM driving circuit (6), the switching power supply (7), the shaping circuit (11), the data storage unit (9), the JTAG interface circuit (10), the CAN interface circuit (13), the RS485 interface circuit (14), the RS232 interface circuit (15), the multi-path A/D sampling circuit (16) and the extended I/O interface circuit (17), and the shaping circuit (11) is electrically connected with the encoder (8); the PWM driving circuit (6) is electrically connected with the inverter unit (4); and the encoder (8) is arranged at the shaft end of the three-phase alternating-current traction motor (5).