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The Study of SPWM Optimization Algorithm Based On DSP

Qunzhan Li

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Abstract

The digital control system of single-phase full-bridge is introduced. The arithmetic of SPWM and double closed loop PI, which is based on the digital signal processor TMS320LF2407, is expatiated on. The principle and software flow chart is given. Tak-ing account of the fluctuant DC voltage of UPFC in traction power supply system without phase exchange, a dynamic SPWM method is proposed by changing the amplitude of modulate wave. The feasibility of the design is verified by the simulation result.

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What this paper is about

The digital control system of single-phase full-bridge is introduced. The arithmetic of SPWM and double closed loop PI, which is based on the digital signal processor TMS320LF2407, is expatiated on. The principle and software flow chart is given. Tak-ing account of the fluctuant DC voltage of UPFC in traction power supply system without phase exchange, a dynamic SPWM method is proposed by changing the amplitude of modulate wave. The feasibility of the design is verified by the simulation result.

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Available abstract

The digital control system of single-phase full-bridge is introduced. The arithmetic of SPWM and double closed loop PI, which is based on the digital signal processor TMS320LF2407, is expatiated on. The principle and software flow chart is given. Tak-ing account of the fluctuant DC voltage of UPFC in traction power supply system without phase exchange, a dynamic SPWM method is proposed by changing the amplitude of modulate wave. The feasibility of the design is verified by the simulation result.

Key concepts: Computer science, Digital signal processing, Flow chart, Digital signal processor, Traction (geology), Software, Voltage, Amplitude

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