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Abstract
With inventing the motor, engineers work on development it. In the past, they are important by development the materials which used in it to improve the performance. Recently, they are improve the performance characteristics by using the semiconductor devices and software programs. In this thesis, the permanent magnet synchronous (PMSM) is chosen due to have some advantages as; high torque to current ratio, high torque to inertia, high efficiency, quick acceleration and declaration and high long life. Also the PMSM has some disadvantages as; demagnetizing at high temperature and very large opposing magneto motive force. Field oriented control (FOC) is used to making the PMSM emulates separately excited DC motor to improve the dynamic performance. With using the FOC, the PMSM still suffered from ripples and noise in the motor torque, motor current and harmonics. Two current control methods are used to trying improvement the performance of PMSM. The two methods of control are hysteresis current control and ramp comparison current control. Proportional integrator curren controller is used with these methods of control to improve the performance characteristics of permanent magnet synchronous motor