The motor frequent starting and braking of adaptability thanks to the inverter power supply, the motor may be no impact on current way to start at a very low frequency and voltage, and can use a variety of braking the inverter supplied rapid braking, frequent starting and braking to achieve to create the conditions so that the motor's mechanical systems and electromagnetic systems in the next cycle of alternating force, to the mechanical structure and insulation leading to fatigue and accelerated aging. 4. Cool low speed when the first issue, the impedance of the asynchronous motor is less than ideal, when the power supply is providing power to the electronic equipment device, also known as the power supply, which provides all the power of computer components require. Cottle frequency than the end of the air compressor brand, the power of the larger loss caused by higher harmonics. Secondly, when ordinary asynchronous motor speed is reduced further, proportional to the cube of the speed of the cooling air flow is reduced, resulting in a low speed cooling condition of the motor deterioration, sharp temperature increase, it is difficult to achieve constant torque output. 5. The motor insulation strength problems of small and medium converter, many of them are using the PWM control mode. His carrier frequency is about several thousand to hundreds of kilohertz, which makes motor stator windings to withstand high voltage rise rate, equivalent to the steepness of the motor is applied to a lot of impulse voltage, so that the motor turn insulation to withstand more ordeal. In addition, the rectangular chopper impulse voltage generated by the PWM inverter compressor is superimposed on the motor operating voltage brand, would pose a threat to the motor of the insulation, the insulation under the repeated impact of high pressure will accelerate aging. Injected screw compressor become the new mainstream of the development of air compressors, piston compressors as compared with the same power under, with unparalleled advantages. Superior performance and reliability. Vibration, low noise, high efficiency, no wearing parts, precise fit between the main and auxiliary rotor and the rotor and the body shell is reduced between gas recirculation leakage and improve efficiency; only intermeshing rotor compressor brand outlets, No cylinder reciprocating motion screw compressor brands, reducing vibration source and noise source; a unique lubrication brings advantages. By virtue of the pressure difference generated itself constantly injected into the compression chamber and bearing lubricants, simplify complex mechanical structure. Injection of lubricating oil film can be formed between the rotor, the rotor can be directly driven by the main rotor deputy, no high-precision timing gears. The lubricating oil injected into the compression increases the airtightness. Lubricants absorb a large amount of heat of compression, and therefore, even if the single-stage compression ratio up to 16, the head can still be controlled in the general degradation of the lubricant and the carbon deposition temperature, it will not generate the different expansion coefficients between the rotor and housing friction. Lubricants can reduce high-frequency noise generated by the compressor. Piston compressor brand, Qin Wei Air (certified), Wenzhou by Xianyang compressor brand Compressor Co., Ltd. Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) is Xianyang, compression, separation equipment leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qin Wei Pneumatic leadership with the staff warmly welcome all inquiries negotiations to create Qin Wei Pneumatic better future.