Impedance Matrix and Parameters Measurement Research for Long Primary Double-Sided Linear Induction Motor

Control Strategies of Thrust Ripple Suppression for Electromagnetic Microgravity Facility

“…However, this approach often relies on simulation for theoretical analysis and is challenging to integrate with practical control applications. The second aspect involves analyzing the impedance asymmetry of LIMs from a mathematical model perspective [9,10]. One study [9] mainly analyzes impedance asymmetry in the ABC coordinate system, while another [10] provides a 𝑑𝑞 coordinate system's inductance matrix model, which is more convenient for application in field-oriented control (FOC) systems.…”

“…The second aspect involves analyzing the impedance asymmetry of LIMs from a mathematical model perspective [9,10]. One study [9] mainly analyzes impedance asymmetry in the ABC coordinate system, while another [10] provides a 𝑑𝑞 coordinate system's inductance matrix model, which is more convenient for application in field-oriented control (FOC) systems. The third aspect involves analyzing the equivalent circuit perspective, introducing a coefficient 𝑓(𝑄) at the excitation inductance to reflect the end effects of a LIM [11][12][13].…”

“…This study focuses on analyzing the thrust ripples of LIMs based on a mathematical model, where the parameters can be obtained through experimental measurements. Research indicates that the impedance asymmetry in LIMs manifests as an imbalance in currents in the control system [9,14,15]. Therefore, reducing thrust ripples can be achieved by eliminating current imbalances.…”

“…Research indicates that the impedance asymmetry in LIMs manifests as an imbalance in currents in the control system [9,14,15]. Therefore, reducing thrust ripples can be achieved by eliminating current imbalances.…”