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For the tradition of permanent magnet synchronous motor direct torque control flux and torque ripple big disadvantage, raised twelve sectors subdivision flux loop control method and the corresponding voltage to open the table. Analysis of the voltage vector of the electromagnetic torque and stator flux role, received limited sector and the voltage vector can cause large torque and flux ripple. Theoretical and experimental comparative analysis of six and twelve sectors divided into the control performance of the sector. Experimental results show that the twelve sectors divided PMSM direct torque control method, both to ensure the DTC fast, and very well reduce the torque and flux ripple.