Many industrial systems, often need to be able to pinpoint and rapid movements of the actuator, in these systems adopt the brushless dc motor servo control, not only improves the production efficiency, and greatly improved the quality of the products, for example, in towel printing machine, using two sets of belt of optical encoder brushless dc motor servo control system, accurate positioning, clear printing, the production efficiency is greatly increased. Applications in precision electronic equipment and instruments used to store all kinds of information data of computer peripheral storage devices, the various memory of spindle motor adopts high-grade precision brushless dc motor, spindle motor, especially for hard disk drives can be suspended in the disc drive disk stability at high speed rotation on both sides, the brushless dc motor parts and assembly accuracy high requirements are put forward. Brushless dc motor is widely used in medical equipment, laser printers, photocopiers, satellite solar panels drives, medical monitoring equipment, etc. Brushless dc motor is widely used in other fields such as aerospace industry, military defense, and so on. The development and application of modern control theory has prompted many new ac servo motor control method, ac servo motor is a multi-variable, nonlinear, strong coupling control object, only a general control method, it is difficult to achieve high performance requirements. Compared to other types of motor, brushless dc motor is a new type of motor, has a superior performance. Brushless dc motor is electromechanical integration products, is the product of the combination of multidisciplinary technology.
