A Method of Reducing Ripple Torque in a Permanent Magnet Motor without Skewing

摘要: A method of reducing ripple torque, i.e., the sum cogging and commutation torques, in permanent-magnet motors without skewing is proposed. The torque for a given range stator current can be substantially reduced by shifting pole pairs half slot pitch choosing value magnet width so as to minimize second-order component torque. confirmed finite-element analysis with both radially magnetized parallel-magnetized magnets. optimal experimental motor 6.18 pitches magnets 5.80 >