Design and implementation of integrated drive circuit for a small BLDC motor

Among low power servo applications, classical DC motors are very popular because they are reasonably cheap and easy to control. The main disadvantage is the mechanical collector, which has only a limited life period. Also, brush sparking can destroy the rotor coil, generate EMC problems. For a brushless DC motor, an electronic inverter avoiding mechanical collector does the commutation of the coils. Therefore, BLDC motor is more reliable and as the price of power electronic devices is still decreasing, the brushless DC motor replaces more and more the conventional dc motor. So permanent magnet brushless DC motors and drives are being used increasingly in a wide range of applications. This has been made possible with the advantages of high performance permanent magnets with high coercively and residual magnetic, which make it possible for the PM to have superior power density, torque to inertia ratio and efficiency, when compared to an induction or conventional DC machine. This paper presents the design of a PM brushless DC motor drive simplistically operates as a classical DC motor. The BLDC motor drive system for this paper composes to the power integrated circuits, the one chip device. And several simple semiconductors add to drive system for a motor drive system simplistically operates as a conventional DC motor. Test results confirmed the feasibility of the proposed motor drive system design.