Control of permanent magnetic synchronous machines and performing an application circuit

Brushless Direct Current (BLDC) motors are among the fastest-growing motor types due to their better torque-speed characteristics, high dynamic response, high efficiency, long operating life, quiet operation, higher speed ranges and more. BLDC motors are used in sectors such as Automotive, Aerospace, Medical, Industrial Automation Equipment and Instrumentation. In order to operate brushless DC motors, a control system and sensors that determine rotor position are needed. For BLDCs, the statorda Hall Effect device is commonly used to determine the rotor position. However, due to the disadvantages of sensors such as cost, location and instability, sensorless speed control has gained importance in recent years. It may also be difficult to install and maintain a position sensor due to limited mounting space and a rigid working environment with severe vibration and / or high temperature. BLDCs are controlled by a microcontroller that generates signals for switching to a three-phase power semiconductor bridge and processes the feedback signals. This semiconductor three-phase bridge provides power to the stator windings based on the control algorithm. Motor position control is performed by analyzing the rotor position information from sensor driven motor hall effect devices. Sensorless drivers; Motor control can be performed using control techniques such as Back Electromotive Force (BackEMF), Indirect Inverse EMF Integration, and Field Focused Control (FOC). The zero crossing detection of the inverse EMF is the most popular method. In this study, basic concepts related to brushless permanent magnet motors are examined, and the structure and working principle of motors are given. Particularly, brushless DC motor which belongs to brushless permanent magnet motor class has been examined. The brushless DC motor has been examined for its sensor with sensor and without sensor Sensorless driver is designed and realization of the driver is done and its experimental results are examined. In the context of sensorless drive design of brushless direct current motor, trapezoidal back EMF zero transfer method is investigated and applied as a control method.