major advantages of bldc motor compare to pmdc motor;\r\n� energy saver\r\n� less maintenance\r\n� less weight compact design\r\n� patented designs\r\n� higher efficiency\r\n� low moment of inertia\r\n� fast acceleration / deceleration / braking\r\n� mosfet or igbt base drive for accurate controls\r\n� greater speed range\r\n� better thermal efficiency.