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This paper proposes a method to reduce cogging torque of a single side Axial Flux Permanent Magnet (AFPM) motor according to analysis results of finite element analysis (FEA) method. First, the main cause of generated cogging torque will be studied using three dimensional FEA method. In order to reduce the cogging torque, a dual layer magnet step skewed (DLMSS) method is proposed to determine the...
High efficiency, high power density and wide constant power region are all the required functions of the traction motor and drive in electric vehicle applications. However, these requirements are mainly dependent on the output line voltage utilization of the motor drivers. Generally, electric vehicle use over-modulation to increase voltage utilization under constant output voltage of battery. A six-step...
In this paper, a novel three-phase bipolar stator surface-mounted permanent magnet (B-SSPM) machine with different magnetizations is proposed. The topologies and operation principles of a 6-stator-slots/8-rotor-poles B-SSPM machine are first introduced briefly, and an optimization on the key dimensions is explored to improve the characteristics of phase electromotive force and to reduce cogging torque...
In this paper, a microprocessor-based PMSM drive with three hall-effect sensors for detecting rotor position is studied. First, three PMSM control methods, namely 120° six-step with current limit, 180° six-step with current control, synchronous frame vector control, are compared based on some key performance indexes, such as vibration, acoustic noise and efficiency. According to the analysis, a PMSM...
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