alexa Sensorless Control of BLDC Motor Drive Fed by Isolated DC-DC Converter | Abstract
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

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This paper proposes an improved topology of an isolated DC-DC converter fed sensorless BLDC drive. The main aim is to control the input voltage of the inverter by changing the duty ratio of switches in the converter for controlling the speed of the motor. In this paper, a comparison study with controlled voltage source fed sensorless BLDC drive is also done and its disadvantages presented .The proposed method finds maximum application in battery powered electric vehicles, aircrafts etc. The isolated DC-DC converter results in less size and weight and also provides isolation by means of High Frequency Transformer (HFT). The BLDC drive employs Direct Back-EMF Detection technique for the sensorless control of the motor. The power circuit simulation for the isolated DC-DC converter fed drive, being high frequency, is done in PSIM and the control circuit simulations are done in MATLAB. Later, both MATLAB and PSIM are coupled by SimCoupler to obtain the speed and torque waveforms.

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Author(s): Sonia Sunny, Rajesh K

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