USB Port based brushless dc servo motor control

Abstract

As a matter of principle, servo motors consist of a motor and a feedback unit. Motor can be DC or AC and feedback unit can be a tacho generator or an encoder. The important difference between servo motors and other motors is their ability to make acceleration and braking too fast. For this, torque should be high and inertia should be as much as low. Among servo systems, brush DC motor, brushless DC motor, short circuit rotor asynchronous motor and synchronous motor are the most preferred servo motor types. In our day, the systems which require sensitive control such as printer, photocopy machine are generally using brushless DC servo motors but their drives cost higher than themselves in price. Therefore, in this study a new USB port-compliant brushless DC servo motor driver module is developed. The module determines direction and speed information of servo motor according to the commands sent from USB port. In this paper, the operation of developed module and the command program working from USB port will be discussed in detail.