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A LOW COST SIMPLIFIED CONTROL STRATEGY FOR PMBLDC MOTOR DRIVE FOR PERFORMANCE IMPROVEMENT
Authors: A. PURNA CHANDRA RAO, Y. P. OBULESU & CH. SAI BABU
Number of views: 398
Three current sensors are required to measure motor phase currents in closed loop speed control of PMBLDC Motor drive. Usually, current sensors are expensive, and torque fluctuations may occur due to differences in current sensor sensitivities. These drawbacks can be eliminated by placing a single current sensor in a DC link of the converter. In this paper, a simplified control strategy has been proposed. The proposed control technique has only one current sensor and two input DC sources. This proposed method is a simple, low cost and enhances performance of the PMBLDC Motor drive i.e., reduced torque ripple, less voltage stress and fast dynamic performance.