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In view of problems of low accuracy of rotor position angle estimation, large computation, poor stability and anti-disturbance performance when sensorless control was used in speed regulation of permanent magnet synchronous motor of mine-used electric locomotive, an improved model reference adaptive system was proposed. Adaptive law is simplified according to zero direct axis current, so as to reduce complexity of calculation. Sliding mode controller is used instead of PI regulator to control speed loop, so as to reduce disturbance influence. The simulation and experimental results show that the method can accurately estimate rotor position angle, reduce speed fluctuation, and has good stability and anti-disturbance ability.

In view of problems of low power quality, low cruising power, short service life of battery, separation between battery charging device and locomotive driving system existed in current charging system of mine-used electric locomotive with lead-acid battery, a new integrated on-board charging system was designed. The system is composed of the front-stage PWM rectifier circuit and the back-stage Buck circuit in series. When charging, the motor windings are reconstructed into the boost inductance of the PWM rectifier circuit to form an integrated on-board charging and discharging circuit. The supercapacitor is used to replace the battery as the energy storage element, which can realize quick on-board charging and discharging function. The simulation results show the system has shorter charging time and higher efficiency, and can realize functions such as power factor correction, ripple suppression, efficient and rapid charging and discharging compared with the traditional charging system.

In order to improve stability of sensorless control for interior permanent magnet synchronous motor of mine-used electric locomotive at low speed stage, an improved pulsating high-frequency voltage injection method was proposed. High-frequency sinusoidal voltage signal is injected into direct axis of estimated synchronous rotating coordinate, and high-frequency current of quadrature axis is processed through low pass filter, so as to obtain signal containing estimation error of rotor position angle. The signal is input into Luenberger observer to calculate estimated rotor position. The simulation and experimental results show that the method can estimate rotor position angle and speed accurately at low speed stage, so that electric locomotive can realize smooth starting, operation and stopping at low speed stage.

In view of problems of long time consumption and electric leakage of traditional charging modes for mine-used electric locomotive, a wireless charging system for mine-used electric locomotive based on loose coupling transformer was proposed. Effects of iron core matching deviation on loose coupling transformer efficiency were simulated by use of finite element software ANSYS Maxwell, and simulation results were verified through experiments. The simulation and experimental results show that transformer efficiency increases with decrease of air gap, and changes little within 50 mm of transverse displacement deviation and 40 mm of longitudinal displacement deviation.

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to improve performance of battery electric locomotive in coal mine, reduce energy consumption and improve work efficiency, a kind of control system of mine-used switched reluctance electric locomotive based on ARM was designed. The system uses control mode combing angular position control and chopped voltage control, adopts control strategy of torque distribution function, and achieves control of the battery motor vehicle combined with speed and current dual closed-loop system. The experimental results show that the system has small torque ripple, high efficiency, strong robustness and good performance of speed adjustment.

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)