Abstract
This paper introduces an ARM-based embedded PWM DC motor control system. The system uses a variable voltage control; the entire system uses the speed and current closed-loop control structure. The main circuit using the structure of high-power system GTR switching devices and the bipolar H-bridge circuit for the power amplifier circuit, to complete irreversible speed regulation also finished reversible speed regulation. PWM modulation part of the ARM embedded development platform, using the C language programming to control the timer to generate two complementary width adjustable rectangular waves. GTR H circuit is controlled by adjusting the width of the waveform from two ways off time in order to achieve the purpose of speed regulation. It increased the flexibility and accuracy of the system while simplifying the process of generation of the PWM pulse.
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