Excitation Scheme to Enhance Output Torque of Sensorless BLDC Motor to Drive the Flight Attitude Control Fins of a Guided Artillery Munition

유도형 탄약의 조정날개 구동용 Sensorless BLDC 전동기의 출력 토크 향상을 위한 여자 기법

In this paper, a new excitation scheme is developed to increase the output torque of the sensorless BLDC(Brushless DC) motor(BLDCM), which drives fins to control the flight attitude of a guided artillery munition. The proposed scheme is based on a 12-step excitation strategy combining two-phase and three-phase excitations. The proposed 12-step excitation scheme can produce more torque than a typical 6-step scheme for the start-up and synchronous operation in the sensorless BLDCM drive. The simulation and experimental results on the sensorless BLDCM drive system to control the fin were verified the validity of the proposed scheme.