Online Sensorless Position Estimation for Switched Reluctance Motors Using One Current Sensor
Online Sensorless Position Estimation for Switched Reluctance Motors Using One Current Sensor
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DOI：
10.1109/tpel.2015.2505706
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发表时间：
2016-10
影响因子：
6.7
通讯作者：
C. Gan;Jianhua Wu;Yihua Hu;Shiyou Yang;W. Cao;J. Kirtley
中科院分区：
文献类型：
--
作者：
C. Gan;Jianhua Wu;Yihua Hu;Shiyou Yang;W. Cao;J. Kirtley
提出了一种基于电流传感器的开关磁阻电机转子位置在线估计方法。这是通过首先将励磁电流与母线电流解耦来实现的。在每个电流基波周期期间，两个相移脉宽调制信号被注入到非对称半桥转换器中的相关下晶体管中，持续短的间隔。在双脉冲的间歇中间触发模数转换器以分离母线电流用于励磁电流识别。接着，在低速运转时的电流斩波控制模式下，通过电流上升时间法，在高速运转时的电压脉冲控制模式下，通过电流梯度法，从励磁电流推定转子位置。所提出的方案仅需要一个总线电流传感器和对转换器电路的微小改变，而不需要单独的相电流传感器或额外的检测设备，实现了更紧凑和更具成本效益的驱动。的无传感器SRM驱动器的性能进行了充分的研究。以750 W三相12/8极开关磁阻电机为例进行了仿真和实验，验证了该控制方案的有效性。
This paper proposes an online sensorless rotor position estimation technique for switched reluctance motors (SRMs) using just one current sensor. It is achieved by first decoupling the excitation current from the bus current. Two phase-shifted pulse width modulation signals are injected into the relevant lower transistors in the asymmetrical half-bridge converter for short intervals during each current fundamental cycle. Analog-to-digital converters are triggered in the pause middles of the dual pulse to separate the bus current for excitation current recognition. Next, the rotor position is estimated from the excitation current, by a current-rise-time method in the current-chopping-control mode in a low-speed operation and a current-gradient method in the voltage-pulse-control mode in a high-speed operation. The proposed scheme requires only a bus current sensor and a minor change to the converter circuit, without a need for individual phase current sensors or additional detection devices, achieving a more compact and cost-effective drive. The performance of the sensorless SRM drive is fully investigated. The simulation and experiments on a 750-W three-phase 12/8-pole SRM are carried out to verify the effectiveness of the proposed scheme.