1、翻译部分 英文原文 Auto-discharging System for Jigging Machine Based on SRM Abstract-This paper introduces an auto-discharging system for jigging machine based on switched reluctance motor (SRM). In this system, SRM is used to replace the traditional asynchronous motor. The hardware system, controller and so
2、ftware design methods are discussed in this paper. AT89C51 is taken as the core component of the speed regulation controller for SMR and works with other peripheral circuits to realize effective control on motor. The experiment shows that auto-discharging system for jigging machine based on SRM is f
3、easible and can play an important role in stabilizing clean coal ash content, reducing clean coal loss, improving product quality and separation efficiency. Keywords： Jigging machine, auto-discharge system； switched reluctance motor 1. INTRODUCTION The jigging machine is a kind of mechanical mineral
4、 sorting equipment and occupies an important position in the production of the large modem coal preparation plant. However, the automation level of jigging machine has been out-dated. The backward control mode in jigging coal preparation restricts the product quality, separation efficiency and proce
5、ss ability. One of the reasons is the lower efficiency of the motor which is used commonly in discharging system for jigging machine. How to improve the efficiency of motor has an important significance for improving coal preparation efficiency and stabilizing product quality. Switched reluctance mo
6、tor (SRM) with better start characteristics is suitable for starting frequently in adverse environmental condition, high temperature and even strong vibration conditions and keeps higher efficiency. Based on these characteristics, we use switched reluctance motor instead of the traditional asynchron
7、ous motor to develop auto-discharging system for jigging machine based on SRM. The experiment shows that auto-discharging system for jigging machine based on SRM is feasible and can play an important role in stabilizing clean coal ash content, reducing clean coal loss, improving product quality and
8、separation efficiency. II. CONSTITUTION OF SPEED-REGULATION SYSTEM FOR SWITCHED RELUCTANCE MOTORS The speed-regulation system for switched reluctance motor is composed of SRM, power converter, controller and detector, as shown in Figure 1. Figure. 1 The structure of the SRM speed-regulation system 1
9、) Switched reluctance motor Switched reluctance motor is the key component of SRM speed-regulation system. 2) Power converter The power converter is a circuit device that is used to drive SRM and provide power for SRM. The on and off status of power switch of power converter are controlled reasonabl
10、y to complete speed regulating. The cost of power converter accounts for a large proportion in whole SRM speed-regulation system, thus selecting and designing suitable power converter is one of key factors that improve performance-price ratio of SRM speed-regulation system. 3) Controller Controller
11、is the centrum of system and will play an important role in the system. The function of controller is, according to actual system running status, to deal with external input instruction, speed feedback signal and feedback information of current sensor and position sensor and to control the working s
12、tate of main switch device in power converter, thus, realizing the control of switched reluctance motor running status, satisfYing the running requirements. 4) Detector In order to enable switched reluctance motor to run normally, the corresponding phase winding must be conductive when the rotor goe
13、s to certain position and every phase windings should be switched correctly all the time. Otherwise, motor not only can not operate as per requirement, but also the phenomena such as motor reversion, stop or rotating random may occur. In order to obtain instantaneous position of rotor while motor runs, the angle displacement sensor must be installed within motor to output correct rotor position information. This is
