According to statistics compiled by the China Association of Automobile Manufacturers on the national customs auto import statistics, in November 2010, the component import performance was relatively good, with a total import volume of 2.47 billion U.S. dollars, an increase of 18.86% compared with the previous period, and a year-on-year increase of 32.01%. In terms of exports, in November 2010, exports of parts and components increased significantly, totaling US$3.965 billion, a year-on-year increase of 16.24% and a year-on-year increase of 40.16%.
The characteristics of single-phase series excited motor: The speed is independent of the frequency of the voltage, instead of AC motors, it changes the voltage and frequency to change the speed. Compared with other AC motors, the DC motor has the advantages of small size, material saving, light weight, and suitable for mass production, and the manufacturing cost is relatively low.
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