The energy-saving effects are influenced by the efficiency of transducer, motor, pump and distribution of load;
系统的节能效果还受变频器效率、电机效率、水泵效率及负荷分布的影响；
To settle the problem, a novel energy-saving motor used in screw pump was designed, and this motor could make efficiency of screw pump oil system improved and variable speed device decreasing.
为此，本文设计了螺杆泵用新型多星形移相变极电机，使得螺杆泵采油系统工作效率进一步提高，同时可以减少了变速装置。
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