Optimum Design of a Single-Phase Line-Start PM Motor Considering Efficiency, Maximum Torque, and Starting Torque

Abstract

In this paper, an optimum design for a single-phase line start permanent magnet (LSPM) motor with respect to efficiency, maximum torque, and starting torque is proposed. The design variables, objective functions, and constraints are selected for this optimum design, which is divided into three steps.Step I maximizes the rated efficiency while maintaining a balanced operation and minimizing the stator copper loss.Step II utilizes equivalent circuit analysis to consider the efficiency and the maximum torque, while step III calculates the precise starting torque using finite element (FE) analysis. The validity of the optimum design is verified by comparing the efficiency, maximum torque, and starting torque characteristics of the time-step FE analysis with experimental results.

Optimal Design of Permanent Magnet Arrangement in Synchronous Motors

“…Examples of surface mounted type and embedded type, which are involved in this article, are shown in Figure 1. The performance of the PMSMs can be elevated by employing rare earth magnets [1,12,13]. In order to guarantee the designs of these machines in the best possible manner, many researches have been done in order to optimize the sizes of PMs [12,14].…”

“…The performance of the PMSMs can be elevated by employing rare earth magnets [1,12,13]. In order to guarantee the designs of these machines in the best possible manner, many researches have been done in order to optimize the sizes of PMs [12,14]. From the early classical research works on single-phase PMSMs, to the extended works, wide detailed facets of the performances of this class of machines are covered, for example, torque behavior, power efficiency, and so on [13].…”