This paper aims to present a model-based design implementation of deadbeat-direct torque and flux control (DB-DTFC) with back-EMF self-sensing for a SPMSM using rapid control prototyping (RCP) in a real-time control environment. Current and flux observers are key technologies for achieving DB-DTFC. However, the implementation of DB-DTFC using RCP tools can lead to an incorrect execution sequence and deteriorated performance. Simulation analyses identify the implementation issues in the observer-based models, and experimental results document the outcomes. The RCP-oriented observer modeling methods that yield a correct implementation and proper performance of DB-DTFC with back-EMF self-sensing are developed and evaluated using RCP auto-code generation.