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Aiming at the performance requirements of aero-control generators of controlling DC torque engines, based on the analysis of the slow positioning accuracy of traditional control system fault targets, a DC torque engine control system design based on dual-mode control is proposed. Based on the dual-mode control principle of DC torque engine, the overall structure of the system is designed. The digital signal is generated by the speed signal simulator, and the MAX144-type programmable logic device is introduced into the serial A / D conversion circuit to improve the signal conversion accuracy. Use silicon carbide (Sic) intelligent power modules to provide suitable expansion matching coefficients for hardware equipment and improve energy consumption. Select TMS320F28335PGFA digital signal processor to convert the signal into digital form. The switching frequency of the control power is in the range of 50-100kHz, which has certain anti-interference ability. Adding a current loop provides a relatively constant current to the engine. In the MPLABI_DE integrated development environment, the dual-mode control magnetic field compensation method is used to debug the current loop control program, select a moderate current, set the rotor pre-position program, and complete the engine control system design according to the system main program flow. It can be known from the test results that the system can reach the fastest positioning accuracy of 0.05 targets per second, which greatly enhances the robust performance of the system.