RMxprt training: DFIG

新的电机类型：通用旋转电机 Generic Rotating Machines (GRM) Source Type AC DC Structure Inner Rotor Outer Rotor Axial-Flux Rotor Stator Type SLOT_AC SLOT_AC1; SALNT_POLE; SALNT_SHAD; SALNT_DCM; NONS_SLOT; PM_SURFACE; PM_INTERIOR; PM_CLAW; AXIAL_AC; AXIAL_PM Rotor Type SLOT_DC; SLOT_CAGE; SALNT_POLE; NONS_SLOT; NONS_RELU; PM_SURFACE; AXIAL_AC; AXIAL_PM; AXIAL_DC; AXIAL_CAGE

新的电机类型：通用旋转电机 Generic Rotating Machines (GRM) (SLOT_AC Stator Core) + (SLOT_AC Rotor Core) = Doubly-Fed Induction Generator (DFIG) (SLOT_AC1 Stator Core) + (SLOT_CAGE Rotor Core) = Single-Phase Induction Motor (IndM1) (SLOT_AC Stator Core) + (SALNT_POLE Rotor Core) = Synchronous Motor / Generator (SynM) (SALNT_DCM Stator Core) + (SLOT_DC Rotor Core) = DC Motor / Generator (DCM) (PM_SURFACE Stator Core) + (SLOT_DC Rotor Core) = PM DC Motor / Generator (PMDC)

通用旋转电机(GRM)： 轴向磁场电机

通用旋转电机(GRM)： 新的IPM电机

风力发电系统 The converter rating is reduced to about 15% of the rated power.

风力机的空气动力学功率 r  the air density R  the turbine radius v  the wind velocity (m/s) cp(l)  the power coefficient, the ratio of the turbine power to the wind power as a function of the tip speed ratio l=Rwt/v wt  the turbine speed (rad/s) At lopt, cp is at its maximum, then turbine power is Pmax = kwt3 where k = (r/2)pR5/lopt3cpmax

风力机的最大功率点跟踪 For a given wind velocity v = v1, the P(wt) curve is the same as the cp(l) curve. For the optimized constant tip speed ratio lopt, as long as the load torque of the wind turbine (or the input power of DFIG) is Pm = Pref  (wm /wref)3 where Pref /wref3 = k is determined by lopt, the wind turbine will always work at maximum efficiency for various wind velocities.

Features Support maximum power point tracking (MPPT) when rotor speed is lower than the synchronous speed Support limited stator and rotor power control when rotor speed is higher than the synchronous speed Support standard single- or double-layer, whole- or half-coiled, whole- or fractional-slot windings for both stator and rotor Support edited winding for stator Support 6 standard slots and edited slots for both stator and rotor Create and setup Maxwell 2D/3D designs Export SIMPLORER circuit model

Maxwell Design Creation: 2D Geometry

Maxwell Design Creation: 3D Geometry

Maxwell Design Creation: Motion And Excitation Setup Rotor Initial Position Rotate rotor to a position q0 where the axis of rotor phase U aligns with the axis of stator phase A Stator Phase Voltage Setting IU = I2msin(swst) = I2msin((ws-w)t) = I2msin(2pft-wt) where wt = p(q-q0), s is slip, and p is the number of pole pairs Rotor Phase Current Setting

Maxwell 2D Results: Stator Phase Currents RMxprt Results: Stator rms current: 1.54 A Stator peak current: 2.18 A

Maxwell 2D Results: Torque RMxprt Results: Input torque: 3.94 N.m Fraction torque: 0.08 N.m Air-gap torque: 3.86 N.m