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Synchronous motor technology is more energy-efficient and cost-effective. It significantly impacts the development of science, especially in the field of transportation and industrial engineering. A synchronous motor is a brushless DC motor (Brushless Direct Current) which is a motor that has good efficiency, is more reliable, and has a longer life. The magnetic field comes from permanent magnets in the rotor and coils in the stator. The brushless DC motor system refers to the concept of an electromechanical circuit with a responsive and energy-efficient drive system. The system is built through electromechanics, electronic circuits, sensor systems, logic circuits, or micro-control algorithms. This study aims to develop a new method for designing a practical and efficient Synchronous Motor using a computational model as a simulation medium for the research results to be obtained. The finite Element Method (FEM) is a numerical technique for determining electrical machines' electromagnetic parameters using the machine's geometric dimensions and material properties. The method used is the finite element method using the Ansys Electronic 2018 software. The motor has good performance with electric current in each phase around 1.5 kA and a magnetic field flux of 0.02 Wb. the speed of the synchronous motor remains constant at 13300 rpm, which produces an induced line voltage and an induced phase voltage at a value of a maximum of 249.72 (volts) and 124.93 (volts). [ABSTRACT FROM AUTHOR]

The distribution of electric flux density has an important influence on the measurement of motor performance. The air gap is one of the main factors in measuring the distribution of electric flux density. The distance between the stator slots and the saliency rotor or air gap has a large impact on the effect of vibration, noise and speed fluctuations of the motor. In addition, the air gap has an important role in the motor temperature level. The magnetic field flux created in the air-gap area is often dissipated into heat energy which causes inefficiency in engine performance. In this research, a synchronous motor is designed to overcome these shortcomings. This research focuses on efforts to strengthen a fundamental understanding of the design analysis of the air gap flux density synchronous motor based on a computational approach. This research was conducted through a simulation using Ansys Electronic 2018 software. In this simulation, the performance of the motor produces a current of 1.5kA in each phase with a magnetic flux field generated in each phase of 0.02 Wb, which can maintain a constant synchronous motor speed at a speed of 13300 rpm, with the highest flux distribution is 600T when the slot degree is 28° to 152° and has the smallest flux distribution is -600T when the slot degree is 208° to 332°. [ABSTRACT FROM AUTHOR]

The often problem that is caused by the permanent magnet synchronous motor construction is an induced voltage on the rotor armature (conductor) that usually appears when the motor is working. The voltage on the rotor armature can directly cause shaft voltage and bearing current because they are mechanically connected. Shaft voltage is the highest cause of ball bearing damage in electric machines. This study focuses on analyzing the voltage on the rotor armature of an electric motor to be tested at rated speed. The research purpose is reached if the value of the armature voltage is still below the minimum value of the breakdown voltage on the shaft and the bearing lubricant. In this paper, the computational method used is the finite element analysis (FEA) method which will be executed using the software. The results of this study obtained a permanent magnet synchronous motor that has good performance with a current input of 1.5 kA in each phase that can run at 13300 rpm and produces a torque of 250 kNm. Flux is in a stable condition with a value of 0.02 Wb and forms an excellent magnetic field distribution on each stator coil so that the motor can operate without problems. The average maximum induced voltage on the rotor armature is 7.8 V, which appears at an angle of 91° - 93° in motor rotation. [ABSTRACT FROM AUTHOR]