变量泵+定量马达调速回路 转矩和功率特性Tm=IPn9m/wm-pm'm/2π Pmo-Tm@m-Pmi-Apm9m =Apmgp-1pmVp np n=PmilPpo-Apmgm Ipp9p=Apm Ipp=(Pp-Pr pp T 0 AV (a) (b)变量泵＋定量马达调速回路 Tm=Δpmqm/ωm=ΔpmVm/2π Pmo=Tmωm=Pmi=Δpmqm =Δpmqp=ΔpmVp np η= Pmi/Ppo=Δpmqm /ppqp =Δpm /pp =(pp- pr )/pp 转矩和功率特性