Power electronic device auxiliary control system based on CPLD chip
A technology of power electronic devices and auxiliary control systems, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as single fault handling methods, limited application occasions, flexibility, and poor adaptability, etc., to achieve The effect of flexible and efficient operation, strong versatility, and comprehensive fault protection functions
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] like figure 1 It is an auxiliary control system for power electronic devices based on CPLD chips, including DSP3, CPLD chip 4 driving DSP3 to work, digital signal detection unit 1 connected to the input terminal of CPLD chip 4, and a display alarm part connected to the output terminal of CPLD chip 4 5. IGBT drive board 16 and contactor control unit 2 .
[0027] CPLD chip 4 comprises RS flip-flop group (the first RS flip-flop 22, the second RS flip-flop 23), setting logic AND gate 6, fault identification module 7, protection logic AND gate 10, blocking logic OR gate 13, first Delay logic 9 and second delay logic 11;
[0028] The display alarm part 5 includes each fault lamp 17, buzzer 18, digital tube 19 and work lamp 20, which are used to display various states of the system when it is working, and to alarm when a fault occur...
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