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Abstract：
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A new kind of screw press was introduced.It was controlled numerically and driven by variable speed switched reluctance motor.Based on summarizing the new development of the machines,the driving method was put forward for screw press driven by variable speed switched reluctance system.The entire structure was designed.The numerical control strategy of the forging energy was explained.The axial angle displacement and stator current of the motor were used as double feedback signal.The mathematic relationship was established between the slide speed and the stator current.Through the control of the switch-on and switch-off angle of insulation grid bipolar transistor and the chopped current control,numerical control of the motion and forging energy was realized with numerical controlling positive or reverse rotate speed and the position of start or stop of the motor.Field tests were done.The conclusion is that the new function of the machine can meet the different energy and speed requests,and the performance of numerical controlling equipment has been realized.
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Reference：
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