Determination of torque-speed characteristic for a two-speed elevator induction machine

作者：Cheraghi Mohsen^*; Booin Mohammad Bayati; Esfahani Mohammad Mahmoudian; Derakhshani Mohammad Mehdi

来源：IET Electric Power Applications, 2018, 12(2): 239-246.

DOI：10.1049/iet-epa.2017.0236

• lifts
• aluminium alloys
• finite element analysis
• asynchronous machines
• torque-speed characteristic determination
• two-speed elevator induction machine
• low-speed braking curve
• rotor aluminium alloy
• rotor slot skew angle
• pulsating torque reduction
• intermediate ring rotor
• skewing leakage
• finite-element method

Two-speed elevator induction machines, because of their economic usage, are still widely used in residential applications of low- and medium-height buildings. In this study, a three-stage method is presented for achieving torque-speed characteristic with an improving low-speed braking curve. In designing a procedure, firstly, a rotor aluminium alloy is changed for reaching the maximum torque at start-up. Secondly, a skew angle of rotor slots is calculated for reducing pulsating torque and smooth high-speed performance and finally, an intermediate ring rotor is proposed in order to reduce the effects of skewing leakage at a low-speed braking curve. The proposed approach for this purpose has been investigated with a finite-element method, and several prototypes have been constructed for confirmation and validation of the presented approach. The accuracy of the proposed analysis is confirmed by experimental tests and laboratory measurements are applied on all prototypes

• 出版日期2018-2