It is found that the hexagon pattern is transformed from diffuse mode by increasing the applied voltage.
实验发现，随电压的升高，六边形斑图是由弥散放电模式演化而成。
Traditional DTC uses hexagon flux control or six-section circle-flux. When the voltage of stator resistance is considered, its section choice has defect.
传统的直接转矩控制采用六边形磁链控制或六区间的圆形磁链控制，造成转矩脉动大，而且当考虑定子电阻压降的影响时，其区间选择存在缺陷。
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