变频

• A novel pwm dc converter with snubber cell
  一种新的带有缓冲单元的脉宽调制式直流变频电路
• The reform of variable frequency energy conservation in paper mill
  造纸厂变频节能的改造
• Mill spindle is used by either inverter or servo motor
  铣床主轴采用变频马达或伺服主轴。
• Study of dual pwm three level converter drives system
  变频调速系统研究
• Application of frequency conversion timing of air compressors
  空气压缩机的变频调速及应用
• Frequency conversion control of master pump motor
  主泵马达变频控制。
• 3 . auto counting , frequency converting timing
  3自动计数，变频调速。
• Termination analysis of active rules
  智能变频电动执行器控制系统设计
• Test methods for frequency shift type automatic train stop
  变频式列车自动停车装置的试验方法
• The main pump uses frequency conversion control
  主泵采用变频控制。