1: servo motor servo motor widely used in various control systems, the input voltage signal can be converted to mechanical output of the motor shaft, the drag element is controlled, so as to achieve the control objectives. DC and AC servo motor points, the first servo motor is a general DC motor, under the control accuracy is not high, only the use of a general DC motor as the servo motor. DC servo motor current terms of structure, that is, low-power DC motor armature control the field and the magnetic field to use more control, but usually armature control. 2: stepper motor stepper motors are used in the manufacture of CNC machine tools, due to the stepper motor does not need A / D converter, a digital pulse signal can be directly converted into angular displacement, it has been considered the best CNC machine actuators . In addition to the CNC machine tool applications, stepper motors can also be used in other machines, such as an automatic feeder in the motor, as a general floppy drive motor can also be used in the printer and plotter. 3: torque motor torque motor with a low speed and high torque characteristics. Generally in the textile industry often use the AC motor torque, and it works the same structure and single-phase induction motor. 4: switched reluctance motor switched reluctance motor is a new variable speed motor, the structure is extremely simple and robust, low cost Cottle air compressor, high speed performance, is a strong contender traditional control motor compressor accessories with strong market potential. 1, before using the air compressor, air compressor, you should carefully read the instruction manual. 2, in order to effectively save energy, you should pay attention to the air compressor room ventilation, air compressor room ambient temperature is too high, the equivalent of reducing the compressor efficiency, reduce displacement, increased energy consumption. Ambient temperature is increased by 100 ° C, the equivalent of compressor efficiency is reduced by 3%. 3, another compressor room should be kept clean and tidy. Air compressor room environment is too dirty, likely to cause air compressor filter, oil filter, oil separator block, lubricating accelerate pollution, frequent replacement. 4, regular maintenance on the air compressor, try to use original parts. If the compressor is not poor maintenance or long-term care, small problems will accumulate into large fault, artificially shortened life of the machine. 5, try to focus on gas compressor. If the compressor are distributed throughout the whole plant, pipeline independence, both to increase the acquisition cost of air compressor, also increased pipeline costs and operation and maintenance costs. Especially if the pipes leak and did not discover serious thought less gas consumption, and with a new air compressor to supplement the purchase of gas consumption, resulting in a waste of air compressor brands, with a 7 kg / cm2g, 10 mm leak calculation, assuming electricity 1 yuan / kWh, 8000 hours a year would be a waste of electricity 320,000 yuan. Xianyang compressor _ _ Qin Wei pneumatic compressor, strong scientific research and technology provided by Compressor Co., Ltd., Xianyang Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) strong, credible, Xianyang in Shaanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qin Wei Air and you hand into the brilliant, for a better future!