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http://dx.doi.org/10.6113/JPE.2010.10.5.485

Performance Improvement of a PMSM Sensorless Control Algorithm Using a Stator Resistance Error Compensator in the Low Speed Region  

Park, Nung-Seo (Advanced Group, HA Control R&D Lab, LG Electronics Inc.)
Jang, Min-Ho (Advanced Group, HA Control R&D Lab, LG Electronics Inc.)
Lee, Jee-Sang (School of Electrical Eng., Pusan National University)
Hong, Keum-Shik (School of Mechanical Eng., Pusan National University)
Kim, Jang-Mok (School of Electrical Eng., Pusan National University)
Publication Information
Journal of Power Electronics / v.10, no.5, 2010 , pp. 485-490 More about this Journal
Abstract
Sensorless control methods are generally used in motor control for home-appliances because of the material cost and manufactureing standard restrictions. The current model-based control algorithm is mainly used for PMSM sensorless control in the home-appliance industry. In this control method, the rotor position is estimated by using the d-axis and q-axis current errors between the real system and a motor model of the position estimator. As a result, the accuracy of the motor model parameters are critical in this control method. A mismatch of the PMSM parameters affects the speed and torque in low speed, steadystate responses. Rotor position errors are mainly caused by a mismatch of the stator resistance. In this paper, a stator resistance compensation algorithm is proposed to improve sensorless control performance. This algorithm is easy to implement and does not require a modification of the motor model or any special interruptions of the controller. The effectiveness of the proposed algorithm is verified through experimental results.
Keywords
Parameter estimation; Permanent magnet synchronous motor; Rotor position estimation; Sensorless control;
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