A new sensorless method for switched reluctance motor drives
A new sensorless method for switched reluctance motor drives
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DOI：
10.1109/ias.1997.643124
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发表时间：
1997-10
期刊：
影响因子：
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通讯作者：
G. Gallegos-López;P. Kjaer;Timothy J. E. Miller
中科院分区：
文献类型：
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作者：
G. Gallegos-López;P. Kjaer;Timothy J. E. Miller
本文介绍了一种采用PWM电压控制的开关磁阻电机转子位置间接检测的新方法。该检测方法使用相电流的导数的变化来检测转子极和定子极开始重叠的位置，每次能量转换给出一个位置更新。由于不需要电机参数的先验知识（除了定子和转子磁极的数量），该方法适用于大多数SRM拓扑结构在宽的功率和速度范围内，并为几个逆变器拓扑结构。该方法允许中等性能的闭环动态。为了启动电机，使用前馈方法，该方法确保即使在负载下也能从静止到最小速度的稳健启动。实验结果证明，即使存在激励重叠，该方法在较低晶体管总线中仅使用一个电流传感器时也具有强大的功能。该方法是可比的反电动势的位置估计无刷直流电动机。该方案的详细操作和实施，连同稳态和动态瞬态测试结果。
The paper describes a new method for indirect sensing of the rotor position in switched reluctance motors using PWM voltage control. The detection method uses the change of the derivative of the phase current to detect the position where a rotor pole and stator pole start to overlap, giving one position update per energy conversion. As no a priori knowledge of motor parameters is required (except for the numbers of stator and rotor poles), the method is applicable to most SRM topologies in a wide power and speed range and for several inverter topologies. The method allows medium performance closed-loop dynamics. To start up the motor a feedforward method is used which assures robust start-up from stand-still up to a minimum speed even under load. Experimental results demonstrate the robust functionality of the method with just one current sensor in the lower transistor bus, even with excitation overlap. The method is comparable to the back-EMF position estimation for brushless DC motors. A detailed operation and implementation of this scheme is shown, together with steady-state and dynamic transient test results.