1, the motor efficiency and temperature issues that form the Inverter regardless of the application of inverter technology and microelectronic technology, by changing the frequency and amplitude of the electrical operating power way to control power AC motor drive components. In operation all have different degrees of harmonic voltage and current, the motor running in a non-sinusoidal voltage and current. According to the data, a sine wave PWM inverter current widespread use as an example, the low-order harmonics to substantially zero, large carrier frequency than the rest of the higher harmonic component is about double: 2u + 1 (u the modulation ratio). That PWM pulse width modulation, a digital output of the microprocessor control technology to control analog circuits. PWM control with its simple, flexible, high efficiency and dynamic response and good and is widely used in measurement, communications to power control and conversion of many areas. PWM is switching power supply term. It is classified according to the regulator's control, in addition to PWM type, as well as the PFM and PWM, PFM mixed. Today, many of the micro controller has PWM controller. Higher harmonics can cause motor stator copper losses, rotor copper (aluminum) consumption, iron loss and the additional increase in loss of air compressor brand offer, most notably copper rotor (aluminum) consumption. Because the asynchronous motor is the most widely used kinds of motor, one of greatest demand. Asynchronous motor by an air gap rotating magnetic field and rotor winding currents induced interaction of electromagnetic torque, in order to achieve an AC motor electromechanical energy conversion into mechanical energy. For induction motor Motor. Because the rotor winding current is induced, also known as induction motors. After synchronous rotation speed is close to the fundamental frequency corresponding to and, therefore, a high frequency voltage to a large slip cutting rotor bars, the rotor will have a great loss. In addition, the need to consider additional copper losses due to skin effect generated. These losses will cause additional heating of the motor, reducing the efficiency, output power is reduced, as will the non-sinusoidal conditions of ordinary three-phase asynchronous motor running on inverter output, the temperature generally increase 10% - 20%. Power supply to provide power to the electronic equipment device, also known as the power supply, which provides power to all components of the computer required. First, the acceptance 1-1, when you received the air compressor you carefully check the box if you do not immediately, please find out immediately due to the carrier by any signs of improper handling, if any damage is found to obtain delivery person signature recognition, which will facilitate your future claim. 1-2, when you receive a compressor, according to the items listed in the packing list, please count the number, type, size, and comes with accessories immediately available. 1-3, any shortages or damaged large air compressor brands, please claim for compensation to the carrier immediately and notify the company assistance. We recommend that you machine, temporarily be stored as packaging, in order to confirm the damage. Second, moving 2-1, lifting or handling compressor can use forklifts or cranes, and with reference to the compressor body weight using a suitable forklift or crane and sling. 2-2, before moving lifting machine brand air compressor supply must be all loose or rotatable member is tightened well. ◆ Important Do not use the air compressor to lift the shell. If using a crane, the required width of the body is greater than or the same type of wood pad support bar fixed to prevent sliding or pinching compressor body sling. Third, the installation 3-1: Installation site selection: compressor installation site should be well planned to ensure the future of air compressor easy maintenance, to avoid undesirable environmental cause abnormal operation of the air compressor. 3-1-1, the compressor must be installed in the room, and asked good lighting and lighting in order to facilitate operation and maintenance. 3-1-2, the ambient temperature should be below 40 ℃, in order to avoid the high temperature operation of the machine, and the higher the ambient temperature, the lower the efficiency of the air compressor, the less amount of air output; In addition, the ambient temperature must be above 5 ℃ The control of water temperature above the freezing point. 3-1-3, the air should be dry and less dust, clean and well ventilated. 3-1-4, if poor factory environment, dust, should install a ventilation duct, the inlet end toward the air is clean place. Or the installation of pre-filter device, in order to maintain the life of the air compressor system parts. 3-1-5, enough to make parts out of the channel when the air compressor around space to be reserved for maintenance and repair. Air compressor from the top of the wall and around the need to have a distance of one meter or more. Compressor brand authority | Ningbo air compressor Brand | Qin Wei Qin Wei Xianyang provided by Air Compressor Co., Ltd.. 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 Qinwei Air into the brilliant and you work for a better future!