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Permanent magnet synchronous motors (PMSM) are appropriate for applications with load-independent speeds or synchronous operation with high accuracy under defined speed. In this paper analysis the structure and equations of the PMSM, direct torque control (DTC) and voltage space vector process then study model reference adaptive system (MRAS) estimators. The PI controller uses from estimate speed...
Direct torque control (DTC) is a method to control motor with utilizing torque and flux. But the torque and current ripples are occurred in the conventional DTC. Reason of undesired torque and current ripples is low number of voltage vectors applied to the motor controlled by the conventional DTC technique. In this paper, DTC of the PMSM has been analyzed. The stator flux and voltage space vectors...
There are big ripples on current and electromagnet torque under traditional hysteresis direct torque control (HDTC) on motor drive system. To solve these problems, a two dimension cloud model controller is designed to instead traditional hysteretic comparator in this paper, and zero voltage vectors are used to further reduce ripples. The torque error, the flux error and stator flux position are used...
Traditional direct torque control causes torque ripple naturally because of its basic Bang-bang control principle. The sliding mode variable structure control with fuzzy logic is presented in the paper. Mathematics model of permanent magnet synchronous motor in primary frame had been described. Sliding mode variable structure is used to design a reasonable sliding surface for minimum control errors...
For the control of a permanent magnet synchronous motor (PMSM) such as the vector control and the direct torque control, the rotor position is required to perform commutations between phases and to control speed and torque too. The sensorless control is popular for several reasons: cost saving, system reliability, etc. The paper presents a non-model based method for the sensorless vector control of...
As technology improves, studies on permanent magnet synchronous motors have increased and became to major on field oriented control and direct torque control methods. The main topics of permanent magnet motor control are mathematical modelling, voltage feed inverter model, space vector modulation and determination of voltage vectors. In this study, the structure and direct torque process of the PMSM...
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