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The characteristic of linear induction motor (LIM) are quite different from the rotary induction motor (RIM) due to the end effects and so on. The conventional high performance control scheme like indirect field oriented control (IFOC) cannot be directly adopted for LIM drives. In this paper, the traction characteristic of the LIM and RIM are compared from different perspectives. The performance of...
In this paper, mathematic model of linear induction motor (LIM) is developed considering the influences of end effects. A full speed range direct thrust control (DTC) scheme for LIM is proposed considering the parameters dynamic variation and characteristic of railway traction application. In low speed range, an improved indirect stator-quantities control (ISC) with circular flux track is applied...
The linear induction motor (LIM) drives using conventional direct thrust control (DTC) schemes have drawbacks of large thrust ripples in low speed range and so on. In this paper, the thrust ripples of the DTC-based LEVI drives are theoretically analyzed. A novel switching scheme using synthesized voltage vector and magnitude modulation method is proposed to replace the conventional switching table...
Due to the existence of end-effects and large mechanic clearance, the parameters of linear induction motor (LIM) are variable and the efficiency is lower than that of rotary induction motor (RIM). This paper proposes a strategy to minimize the losses for direct thrust-controlled linear induction motor drives. The proposed strategy, which is based on a novel search algorithm, chooses primary current...
Single sided linear induction motor (SLIM) has good direct drive ability though its efficiency is poor compared with the rotary counterpart. The motor model including iron loss under synchronous coordination is established and the variable loss function is derived in the paper. In the proposed equivalent circuit model of SLIM, to consider the influence of primary leakage inductance on loss calculation,...
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