Novel current mode control method for the multi-phase trans-linked boost chopper circuit which is suitable for Electric Vehicle (EV), Hybrid Electric Vehicle (HEV) and Fuel-Cell Electric Vehicle (FC-EV) is proposed in this paper. In case of the proposed digital current mode control method suitable for the multi-phase trans-linked type boost chopper circuit, the inductor current is sampled only twice in a switching period. The proposed digital current mode control method needs independent control for each phase current. Furthermore, solving the problem of the current instability effectively, a compensating ramp is required for the current control algorithm. The proposed digital current mode control algorithm and the block diagram are described in this paper. In addition to this, the condition of the compensating ramp for the multi-phase trans-linked type boost chopper circuit is shown, too. The feasible evaluations of the proposed digital current mode control are discussed with the experimental result.
