Single-phase 220 volts. Zero line voltage between phase pairs. Two phases is a phase line and b or c of new energy efficient motors, phase voltage is 380 common appliances is 380 welders. Three-phase alternating voltage is 380v between the a.b.c. 380v three-phase electrical appliances or equipment motors. The whole AC into DC. Motor capacitor can not replace the exciter. Exciter stator coils, power transmission and rotor coils at the same time to turn the adjustable speed motor has carbon brushes. Is mainly used as a three-phase electric motor power supply, i.e., to rotate the load. Because of the three phase three-phase power are 120 degrees. Rotor stuck phenomenon does not occur. Three-phase power for industrial production, the voltage is 360v single phase power for normal living, the voltage is 220v three-phase power, there are four lines of which 3 for the promotion of energy-saving motors 220v FireWire directory, a zero line, any one hot wire used in combination with the zero line is, we usually say that electricity, and 220v electric city, with a three-phase generator as a power source, called the three-phase power supply; u, v, w is called a three-phase, phase to phase voltage between the line voltage, the voltage is 380v; centerline called phase voltage between phase voltage is 220v. 1, three-phase and single-phase power supply difference: each phase of the point where the power generators are given three phases, three-phase power can constitute a single phase circuit to provide users with electrical energy. Note here the AC circuit can not be called positive or negative, should be called the line side (China said electricity FireWire) and neutral (China Power said the zero line). 2, in accordance with the provisions of the neutral point 380 volts (three-phase) of the civil power should not be grounded in into the household (in the transformer is grounded, the ground is not taken into account because of the suspension points higher than the supply voltage caused by point bit, grounding transformer grounding client side is in the earth there is a certain resistance), is a power supply line and a zero line (neutral point lead) constitute a loop in the single-phase three-core power jack also connected with a ground wire. Recently ye3 energy efficient motors, relying on the construction of Beijing University of Aeronautics and Astronautics "Beijing high-speed magnetic levitation motor technology and application engineering and technology research center" was an important breakthrough in the development of high-speed motor, the successfully developed China's first ultra-high-speed magnetic levitation 30kW permanent magnet motor . The Engineering Center to capture the overall structural design of magnetic levitation high-speed motor, three degrees of freedom of permanent magnet bias magnetic bearing design, stability control ultrafast magnetic bearing rotor system and a number of key technology, developed with independent intellectual property rights of low-power ultra- High-speed magnetic levitation permanent magnet motor, to fill the gaps in the field. Conventional compressor motor speed limit due to restrictions, such as only using up gearbox driven energy-saving motors, resulting in bulky compressor system, high-energy, short life, noise pollution. High-speed magnetic levitation permanent magnet direct drive motor through work, can greatly simplify the overdrive gear system architecture, significantly reduce system power consumption, long life, reduce noise pollution, to achieve energy saving and environmental protection. Current international blockade of such products for technology to China. High-speed magnetic levitation motor developed with independent intellectual property rights, is an important way to enhance the capability of independent innovation of China's high-end equipment manufacturing. Currently, the technology has been completed in the trial production for the next industry has laid a good foundation. Environmentally friendly energy-saving motors, energy-saving motors, Allianz Dresdner Xiang Xiang provided by the Zhengzhou Electric Manufacturing Co., Zhengzhou Dresdner Cheung Motor Manufacturing Co. (www.deshengxiangmotor.com) strong, credible, in Zhengzhou, Henan Province of asynchronous motor industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Dresdner innovative ideas will lead you hand into the brilliant harmony for a better future!