Brush is connected to the power supply conductive member and the rotor winding motor offer, with conductive and wear both properties. Brushless permanent magnet motor using a single metal sheet or metal-graphite brushes, electric graphite brush. VCR used in permanent magnet DC motors, electronic circuits or steady speed centrifugal steady speed devices. 2) where the AC motor can be divided into: single-phase motors and three-phase motors. 2. According to the structure and working principle can be divided into: can be divided DC motors, asynchronous and synchronous motors. 1) synchronous motor can be divided into: permanent magnet synchronous motor, synchronous reluctance motors and hysteresis synchronous motors. 2) induction motor can be divided into: AC induction motor and the motor commutator. Motor brand, the Swiss mechanical and electrical liter (certified), motor ventilation and air conditioning provided by the liter Swiss mechanical and electrical equipment factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In liters Swiss electromechanical leadership with the staff warmly welcome all inquiries negotiations to create liter Swiss electromechanical better future.