Performance prediction of annular linear induction pump under constant slip frequency operation

2020 ◽  
Vol 147 ◽  
pp. 107677
Author(s):  
Prashant Sharma ◽  
B.K. Nashine ◽  
Awadhesh Mani
Keyword(s):  
Performance Prediction ◽  
Linear Induction ◽  
Slip Frequency

Half Region Dynamical Slip-Frequency Control of Single-Sided Linear Induction Motor

2013 ◽  
Vol 834-836 ◽  
pp. 1401-1406
Author(s):  
Jiang Ming Deng ◽  
Te Fang Chen ◽  
Jian Xiang Tang
Keyword(s):  
Thrust Force ◽  
Frequency Control ◽  
Experimental Tests ◽  
Input Power ◽  
Attractive Force ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Direct Motion ◽  
Slip Frequency ◽  
Maximum Thrust

Single-sided Linear Induction Motors (SLIMs) have been widely used in various applications for demanding direct motion or wheelless contact, e.g, the maglev transportation, in which SLIMs are employed as the traction component. Due to its special structure, the SLIM will generate attractive force as it generates thrust force. Within limited input power, in order to maximize the thrust force and restrict the attractive force, a half region dynamical slip-frequency(HRDSF) control scheme for SLIM is proposed. If SLIM is operated under acceleration or deceleration operations,slip-frequency is controlled in the high slip-frequency region close to the maximum thrust point in order to obtain the maximum thrust, and if SLIM is operated under coasting operation, slip-frequency is automatically adjusted at large value to generate a particular thrust corresponding to moving resistance, and the attractive force values, meanwhile, are kept at small values. The validity of the proposed method are verified by both simulations and experimental tests.

scholarly journals Design of single-sided linear induction motor for low-speed Maglev vehicle in 160 km/h and variable slip frequency control

2018 ◽  
Vol 4 (2) ◽  
pp. 120-128 ◽  
Author(s):  
Yunfeng He ◽  
You-Sheng Wang ◽  
Qinfen Lu ◽  
Lei Zhang ◽  
Fang Liang
Keyword(s):  
Control Method ◽  
Frequency Control ◽  
Lightweight Design ◽  
Traction Force ◽  
Maglev Train ◽  
Linear Induction ◽  
Low Speed ◽  
Linear Induction Motor ◽  
Slip Frequency ◽  
And Control

Background: The mid-low speed Maglev train adopts the single-sided linear induction motors (SLIMs) as drive part, of which design and control method has become research hotspot when the velocity is elevated from 120 km/h to 160 km/h. Aim: For SLIMs applied in 160 km/h low-speed maglev train, the design scheme is introduced and then a novel variable slip frequency control method is proposed. Methods of the studies: This control method adopts low slip frequency at start-up to produce large starting traction force and high slip frequency during high velocity area to obtain great power. The influence to the normal force is also investigated. Results: With this method, the weight of the system can be effectively reduced and the lightweight design of SLIM is realized. Conclusion:  The novel variable slip frequency control method meets the requirement of both high starting acceleration and enough residual acceleration for 160 km/h mid-low speed maglev train.

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