The basic mathematical equations of the 15° shifted dual twelvephase nonsalient pole synchronous rectifier generator were established in the abc and dq0 coordinate systems respectively, and the motor voltage, flux linkage, output power, electromagnetic torque and rotor motion equation were derived. The simulation model of 15° shifted dual twelvephase nonsalient pole synchronous rectifier generator was set up in MATLAB/Simulink. The unbalanced load simulation and test were carried out on the two outputs, and the correctness of the mathematical model of the double twelvephase nonsalient synchronous rectifier generator was verified by the basically consistent results of simulation and test. A foundation for the research on the operation performance and excitation control system of the dual twelvephase nonsalient pole synchronous rectifier generator was laid.