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This paper describes the analytic model of a permanent magnetic synchronous machine (PMSM) of a flywheel in outer rotor design. The model is used for loss prediction within a parametric optimization algorithm. It accounts for iron and copper losses as function of electric power and rotational velocity. Magnetic state and currents are approximated by empirical assessments and an analytical model for...
Accurate measurement of rotor angle in Permanent Magnet Synchronous Motor (PMSM) drive applications is important when high performances as low level torque ripples are required. If the relationship between torque ripple and angle error is known, then, further steps can be done in order to reduce the level of the ripple. Based on an analytical description of the sensor model, a relationship between...
The miniaturization and high efficiency of permanent magnet synchronous motors (PMSMs) are desired in numerous applications. PMSMs have a number of design parameters in order to enable miniaturization and high efficiency. One such parameter is the ratio of the external diameter to the stack length (D/L). In this paper, we examine the effect of D/L on torque and efficiency in outer rotor surface permanent...
Recently the interest in permanent-magnet synchronous machines (PMSMs) operating at high speed has grown. However, a lot of design and operation questions remain unanswered. This work aims at studying the effect of the number of pole pairs, the number of slots per pole per phase and the coil throw on the torque and the torque ripple in high-speed PMSMs. High-speed machines are often equipped with...
Accuracy and robustness of sensorless speed control of non-salient PMSMs in the low-speed region and at start-up is a critical issue, due to the low amplitude of the back-EMF which prevents estimation and then closed-loop control in the zero speed range. This problem is usually overcome by adopting an open-loop control (e.g. constant amplitude rotating current space vector), which is normally able...
In this paper a simple dynamic circuit-based model for a rotor surface mounted PMSM with inter-turn winding short-circuit fault is presented. Finite element analysis is used for parameter determination and study the PMSM under fault conditions. The Analytical expressions are proposed for determining the fault model parameters. The proposed circuit model and parameter expressions are validated by time...
This paper investigates modeling and simulation of dual-rotor permanent magnet synchronous motor. The emulated model of a novel DRPMSM is constructed based on MATLAB/Simulink. To test the correctness of the emulated motor model, Vector Control (VC) system and Space Vector PWM Control (SVPWM) system are used to simulate the model of the motor. The simulation results show the correctness of the model...
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