变频调速异步电机的优化设计(英文)

OPTIMAL DESIGN FOR INVERTER-DRIVEN INDUCTION MOTORS

随着变频调速技术的发展,异步电机在工业传动领域中的应用越来越广泛。传统的异步电机设计方法已经不适应变频调速异步电机的设计要求。传统电机的设计重点在于额定点效率、功率因数、最大转矩、起动转矩、起动电流、运行温升和价格等指标。而变频调速电机的设计重点是在调速范围内的效率、功率因数、温升,以及动态响应性能等。本文根据变频调速集成系统的特点,提出具有针对性的变频调速电机优化设计策略。该策略具有以下几个特点:①采用自适应设计模型;②针对变频器供电的谐波影响分析模型;③采用最优滑差控制和面向系统的优化设计方法。利用该优化设计方法,使得变频调速异步电机更加高效节能。

With the development of adjustable speed with variable frequency systems, the induction motor is applied more and more widely in the industrial drive. The conventional induction motor design is not suitable for the inverter-driven induction motor any longer. The key-points of the design for a conventional motor are its efficiency, power factor, maximum torque, starting torque, starting current, elevated temperature of the operating performance and the cost. But the emphases of the design for an inverter-driven induction motor are the efficiency, power factor, elevated temperature in the variable speed range, and dynamic response. Based on the characteristics of adjustable speed with variable frequency systems, the paper presents an optimal design strategy. It has the following features: ① advanced self-adaptive design model; ② harmonic analysis model; ③ optimal slip control and system-oriented optimal design methods. On the whole, the optimal design brings higher efficiency to the inverter-driven induction motors.