This paper introduced briefly on the situation of high voltage motor,the technical data of ventilater and pumps,the characteristic of tube net,the principle of energy saving of speed govonor by frequency modulator and the applied foreground in our company.

Employment of freguency converter in unit of fan or pump and its energysaving effect;

Based on the experiment,according to characteristic of configuration and operation for injection pump of model A,draw up detailed technies of ajusting and testing.