Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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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)
  • Received : 2010.04.12
  • Published : 2010.09.20
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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.

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References

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