Single-phase 220 volts. Zero line voltage between phase pairs. Phase two phases are a and b, or c, between phase voltages are 380, 380 common use of electrical welding machine. 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 electric motors used in industrial production of energy to promote the directory, the voltage is 360v single phase power for normal living, the voltage is 220v three-phase power, there are four lines of which three to 220v FireWire, 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. Motor export beware disorderly competition energy efficient motors become subject to international market trends affecting the economic slowdown, social factors such as lower consumption growth in the first half of 2014 export growth has declined motor. Customs data show that in the first half of 2014 was $ 3.62 billion exports motor, essentially flat with last year, a slight increase of 5.6%; and not as strong import growth in the first two years, amounting to $ 1.73 billion, an increase similar to last flat, only a slight decline 1.83%. green energy-saving motors, the export of China's provinces of Guangdong, a dominant position can not shake from exporting provinces of view, the country is mainly concentrated in the provinces of Jiangsu, Zhejiang area exports and the Pearl River Delta region. Exports in the first half of the motor from the provinces in 2014, the Guangdong Province is the largest province of China's export motor, with exports amounting to $ 1.348 billion, accounting for 37.2 percent, exports fell 4.98%. Jiangsu Province good momentum of development, an increase of 12.19 % ye3 energy efficient motors, motor beyond Zhejiang become China's second largest export province. Overall, the number of the last two years of the motor tends to decrease export enterprises, enterprises through competition and restructuring, high-quality corporate retained, will be more competitive, but also conducive to the orderly development of the market, industry consolidation and the entire healthy development of the industry, reducing the market situation is not conducive to the development of low-cost competition. Energy efficient motors become a trend in the global context of reducing energy consumption, energy efficient motors become the consensus of the world's motor industry development. United States, Canada, Mexico, Brazil, Australia and New Zealand and other countries have developed a motor energy efficiency standards and energy efficiency labeling system, a clear electrical energy efficiency and timetable of implementation and scope. For example, the United States over the EPACT standards of NEMAPremium ultra-high energy efficiency standards, the EU's EUCEMEP standards, Australia AS / NS1359.52000 and our GB186132012 standards. Two energy-saving motors, Dresdner Cheung (certified), energy-saving motors provided by Zhengzhou Dresdner Motor Manufacturing Co. Cheung. Zhengzhou Dresdner Cheung Motor Manufacturing Co. (www.deshengxiangmotor.com) is Zhengzhou, asynchronous motor leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Cheung at Dresdner leadership with the staff warmly welcome all inquiries negotiations to create a better future for Dresdner Cheung.