دانلود Design of a Novel Consequent-Pole Transverse-Flux Machine with Improved Permanent Magnet Utilization

Abstract

Severe leakage flux is a long-existed  drawback in the transverse-flux permanent  magnet  machines (TFPM), which results in a low PM  utilization  rate  and  prominent  cogging  torque  in  TFPMs.  Aiming  to  solve  this  problem,  this  paper  presents  a  novel  consequent-pole  transverse-flux  machine  (CP-TFM).  The  key  is  to  artificially  shift  the  upper  and  lower  salient-pole  rotors  with  a  half-pole  pitch and  connect  them  with  a  ring-shaped  core.  Therefore,  a  complementary  magnetic  circuit  is  constructed  to  reduce  the  flux  leakage between the adjacent poles as well as improve the PM utilization rate.  To verify  the feasibility of design, a 3D finite element  model is established  and  its  electromagnetic  performance  is  evaluated.  With  the  same  peripheral  dimension  and  copper  loss,  a  quantitative comparison is carried out between the proposed CP-TFM and conventional TFPM. FE simulation results reveal that, compared to its contrast, the proposed solution can almost double the PM utilization ratio and effectively reduce the cogging torque.