Dual loop digital control design and implementation of a DSP based high power boost converter in fuel cell electric vehicle

High power boost converter has become the essential part of the distributed power system that enables energy to be fully utilized in fuel cell powered electric vehicles. This paper presents a DSP based direct digital control (DDC) design and implementation for a high power boost converter. A single loop and dual loop voltage control are digitally implemented and compared. The real time workshop (RTW) is used for automatic real-time code generation. Experimental results of a 20 kW boost converter based on TMS320F2808 DSP during reference voltage changes, input voltage changes, and load disturbances are presented. The results show that dual loop control achieves better steady state and transient performance than single loop control. In addition, the experimental results validate the effectiveness of using the RTW for automatic code generation to speed up the system implementation.