Link voltage peak control of parallel resonant converter by control of the converter switching instant

This paper describes a new control strategy of the parallel resonant DC link power converter called voltage peak control (VPC). VPC limits the link voltage to twice the DC link voltage. The strategy eliminates the need for additional power electronic components to clamp the link voltage. The operation of the resonant link is described highlighting the factors that influence the link voltage peak. The paper describes how control of the link voltage peak is possible by appropriate timing of power converter switching. The VPC strategy is implemented in a parallel resonant DC link power converter and simulations with the VPC strategy turned on and turned off are compared. Finally, experimental verification of the VPC strategy and measurements of switching losses are presented. It is concluded that the switching losses are low and the link voltage peak can be controlled without additional clamp circuits using VPC.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>