Abstract
The paper use CPLD chip EPM7812 to output 100 ~ 500Hz pulse signal and the trigger signal source with the single pulse signal, and design IGBT driving circuit with overcurrent and overvoltage protection function and electromagnetic compatibility (EMC) design of using optocoupler HCPL-3120. And for high power CO2 laser is developed, this paper designs a control system of digital signal processor based on DSP technology, and introduce respectively circuit from two aspects: hardware and software core unit control system in detail; in order to overcome the strong electromagnetic interference generated in the working process of laser, we design power filtering, grounding, safety the key data storage of digital filtering, self-recovery, anti-interference design reset. After a long run test, the control system is stable and reliable, and the control response is fast. It is of great practical and popularization value.
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