Postion Sensorless Direct Torque With Indirect Flux Control of BLDC Motor In Three Phase Conduction Mode
Shiny Sara Jacob1, P Sandhya2
1Shiny Sara Jacob, Department of Electrical and Electronic Engineering, Mar Baselios College of Engineering and Technology, Trivandrum, Kerala University, India.
2P. Sandhya, Department of Electrical and Electronic Engineering, Mar Baselios College of Engineering and Technology, Trivandrum, Kerala University, India.
Manuscript received on 15 October 2015 | Revised Manuscript received on 25 October 2015 | Manuscript Published on 30 October 2015 | PP: 116-120 | Volume-5 Issue-1, October 2015 | Retrieval Number: A4310105115/15©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this work, an analysis on position sensorless direct torque control of BLDC Motor with indirect flux control have been studied using two level, six switch Voltage Source Inverter (VSI). By adopting the indirect flux control in direct torque control, the stator flux can be effectively controlled in the constant torque region. This scheme is adapted to three phase conduction mode of VSI. Maximum torque efficiency can be obtained in this method since the torque is estimated in the dq reference frame. In direct torque with indirect flux control of BLDC in three phase conduction mode, the commutation torque ripple can be minimized as well as torque ripple can be effectively reduced. Since the scheme is position sensorless, the electrical rotor position is estimated using stator winding inductance, stationary reference frame currents and flux linkages. The voltage vector selection is set up in the look-up table so that fast torque response is possible. Since the neutral point of the motor is not available, conventional 2×3 matrix is replaced by 2×2 Park’s and Clarke’s transformations for the balanced systems. The experimental results are validated in MATLAB/SIMULINK.
Keywords: Brushless DC (BLDC) Motor, Constant Torque Region, Direct Torque Control (DTC), Three Phase Conduction Mode, Voltage Source Inverter (VSI).
Scope of the Article: Sensor Networks, Actuators for Internet of Things