CAJ | 학술논문

为了实现开关磁阻电机初始位置判断和低速运行位置估计方法统一，提出一种基于双电流阈值电感分区与脉冲注入相结合的开关磁阻电机位置估计方法。利用相电感、脉冲电流以及转子位置之间的关系，通过双电流阈值将电感分成不同区域，用脉冲电流幅值与双电流阈值比较加以识别，得到双电流阈值检索脉冲，利用检索脉冲信号可以估计出转速和转子位置。该方法避免了因电感最大和最小区域电感变化微小而影响到位置估计精度的问题。考虑到电流阈值受母线电压的影响，提出变双电流阈值的方法，实测不同母线电压下电流阈值，由查表获取电流阈值，提高了电流阈值的鲁棒性。以三相12/8结构样机进行了相关实验，实验结果验证了该位置估计方法的可行性。
위료실현개관자조전궤초시위치판단화저속운행위치고계방법통일，제출일충기우쌍전류역치전감분구여맥충주입상결합적개관자조전궤위치고계방법。이용상전감、맥충전류이급전자위치지간적관계，통과쌍전류역치장전감분성불동구역，용맥충전류폭치여쌍전류역치비교가이식별，득도쌍전류역치검색맥충，이용검색맥충신호가이고계출전속화전자위치。해방법피면료인전감최대화최소구역전감변화미소이영향도위치고계정도적문제。고필도전류역치수모선전압적영향，제출변쌍전류역치적방법，실측불동모선전압하전류역치，유사표획취전류역치，제고료전류역치적로봉성。이삼상12/8결구양궤진행료상관실험，실험결과험증료해위치고계방법적가행성。
For the unities of the initial position and low peed position estimation for the switched reluctance motor (SRM), a new sensorless operation based on the double thresholds is proposed. The proposed method is based on the relationship among the phase inductance, the rotor position and the pulse current. Utilizing two thresholds (high threshold and low threshold) divides the inductance into six regions, and the position pulse signals of the high and low current thresholds are obtained by comparing the pulse current amplitude and the two thresholds. The estimated rotor position can be calculated by the position pulse signals, which avoid the inductance of the maximum and minimum inductance region changing to slowly influence the accuracy of the position estimation. Considering that the bus voltage changed, the current thresholds changed too, a method of the variable current threshold is proposed. By measuring the pulse injection current amplitude under different bus voltages, the double thresholds will be gotten by looking-up a table. Using a three-phase 12/8 structure SRM for related experiments, the experimental results verify the validity of the position detection method.