This paper presents a state of the art on brushless Permanent Magnet Alternative Current (PMAC) and Permanent Magnet Direct Current (PMDC) motor drives. The brushless PMAC and PMDC motor drives are the latest choices of researchers due to their high efficiency, silent operation, compact size, high reliability, and low maintenance requirements. These motors are preferred for numerous applications. An in-depth analysis of PMAC and PMDC motor drives have been discussed. The Permanent Magnets (PMs) motor drives can be classified into two categories, first is PMAC motor drives, i.e. PMSM and the second one is PMDC motor drives, i.e. BLDC motors. There has been a long misunderstanding between the two ways of driving and controlling a motor with no windings on the rotor but only PMs. In this paper given a comprehensive analysis of both motor drives. So, beginner of the research scholars are easily able to understand about brushless PMAC and PMDC motor drives.