Analysis and design of contactless self-resonant induced movable chopper for the linear synchronous machine

This paper presents an expandable and flexible contactless induced movable chopper for linear synchronous machines. By using a ringing choke converter with distributed parallel windings (DPW-RCC), the configuration will be easily expanded when the power rating is increased for the linear synchronous machine. Therefore no further re-design work is required. The associated analysis and design for the chopper by using DPW-RCC is also provided. It is believed that the associated investigation will be applicable to the associated movable chopper design for linear synchronous machines, especially in the high power multi-level topology for linear synchronous motor drives. By using high frequency self-resonant switching, which is better than the low frequency switching, the required power will be easily transferred from the fixed module on the ground to the moving module without contact. Again, the high frequency switching is self-resonant based on soft switching principle. That means the associated system loss is decreased and the entire system efficiency improved considerably. This paper sets up design guidelines for the contactless DPW-RCC structure. It is believed that the associated investigation will be helpful to design the related contactless induced movable chopper for linear synchronous machines.