Low efficienc y,power factor and great energy loss cou ld appear as a result of the unmatching of the load and the motor of the beam pu mper,to which there is no perfect solution.

• 游梁式抽油机的负荷具有周期变化的特性,电机具有恒转矩特性,由于二者不匹配导致了抽油机的工作效率低,功率因数小,电能损耗大。