The plastic-SEAL motor was first developedand developed in the United States in the middle of the early 80, then it waswidely used in Japan. In Japan, the production of plastic-sealed motor hasPanasonic, Mitsubishi, Zhi Pu, Cao Jin, Hitachi and other companies. Panasonic,Zhi Pu, grass and Tianjin three of the company's products occupied most of theJapanese market, grass and other companies also set up in foreign factories toproduce plastic sealed motor.