Position Sensorless Control of Switched Reluctance Motors Using Reference and Virtual Flux Linkage With One-Phase Current Sensor in Medium and High Speed
Position Sensorless Control of Switched Reluctance Motors Using Reference and Virtual Flux Linkage With One-Phase Current Sensor in Medium and High Speed
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DOI：
10.1109/tie.2019.2912764
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发表时间：
2020-04
影响因子：
7.7
通讯作者：
Wen Ding;Kaidi Song
中科院分区：
文献类型：
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作者：
Wen Ding;Kaidi Song
本文提出了一种新型的6/4开关磁阻电动机中高速无位置传感器控制方法。为了消除相电压传感器，在整个导通周期内建立虚拟相电压来代替实时相电压，从而计算相磁链，称为虚拟磁链。利用非线性模型估计转子任意位置的参考磁链曲线。在只有单相电流传感器的情况下，通过比较参考磁链和虚拟磁链来确定关断角位置和换相位置。转速估计是通过转子特定位置的两条参考磁链-电流曲线来实现的。在得到当前相位关断脉冲和下一相位开断脉冲的基础上，采用延时策略得到剩余的三个相位的触发脉冲信号。该方案仅需要单相电流传感器，无需脉冲注入或复杂的解耦算法，实现了简单而经济的驱动。在6/4极原型SRM驱动系统上进行了仿真和实验，验证了所提无传感器控制方案的正确性和有效性。
This paper presents a novel position sensorless control for 6/4 switched reluctance motors (SRMs) using only one-phase current sensor in medium and high speed. In order to eliminate phase voltage sensors, a virtual phase voltage is established to replace the real-time phase voltage in the whole conduction cycle, so as to calculate the phase flux linkage which is called virtual flux linkage. A nonlinear model is utilized to estimate the reference flux linkage-curve of any rotor position. With only one-phase current sensor, the determination of turn off angle position and phase commutation position is achieved by the comparison of reference flux linkage and virtual flux linkage. The speed estimation is performed by two reference flux linkage-current curves at particular rotor positions. Based on the obtained turn off pulse of the present phase and the turn on pulse of next phase, the remaining trigger pulse signals of three phases are derived from a delay-time strategy. The proposed scheme requires only one-phase current sensor, without any pulse injection or complicated decoupling algorithm, achieving a simple and cost-effective drive. Simulations and experiments are carried out on a 6/4-pole prototype SRM drive system to verify the correctness and effectiveness of the proposed sensorless control scheme.