ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
The main objective of the paper is to present a model for choosing proper motor and transmission under predicted periodic load taking into account the iron losses and mechanical losses. In PM machines, iron losses form a significant fraction of the total loss partly due to the non-sinusoidal flux density distribution. This paper presents a set of improved approximate models for the prediction of iron losses. Mechanical losses form another significant fraction of the total loss both in low-speed motors and high-speed motors. In this paper, general methods of predicting iron losses and mechanical losses are presented. Continuous duty working range and dynamic working range are the two main working ranges of the PM brushless motors. In this paper available transmission ratios are defined as the interval between the intersections of the continuous duty limit curve and the performance curve of the motor. In the conventional approach the limit torque is constant, which is the rated torque at the maximum angular speed of the motor. Eddy current loss and hysteresis loss will be studied and evaluated in the new approach in order to calculate the limit torque at each angular speed. The limit torques are no longer constant but decrease as the angular speed increases. Based on the analyzed parameters, the transmission ratio is calculated by an analysis software Matlab. The results obtained from the proposed approach are compared with those using conventional approach. The features of the proposed approach suggest a candidate method for evaluating the torque limits since it considers iron losses and mechanical losses, which affects the efficiency vary with the angular speed of motors in high speed mode. Safer and more beneficial solutions are proposed in this approach.