单极性PWM桥式直流变换电路在直流励磁系统中的应用

Application of Monopole PWM Bridge DC Convert Circuit to DC Excitation System

利用单极性PWM桥式直流变换电路所具有电流脉动小的优点,结合微处理技术,应用在独立电源供电的直流励磁系统中,便于实现无触点化换向操作,且动作响应快速,更好的满足系统对励磁部分的要求。单极性;PWM;桥式直流变换电路;

With the development of the Internet, the technology of Web Service provide us the advanced method to call the existed the web method which based on B/S architecture instead of C/S architecture. The mobile service providers may use Web Service to integrate Internet service and mobile service. This paper explain how to use the technology of Web Service into the field of mobile value added service.