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直流屏原理(PPT课件)

  • 2026-07-20 14:37:40
直流屏原理(PPT课件)

高频开关整流模块：高频开关整流模块是直流屏的心脏，负责给直流屏提供动力，一方面给蓄电池充电，另一方面给直流负载提供正常工作电流。充电模块内部有监控系统能监视、控制模块运行情况。由于充电模块本身具有CPU，充电模块也可以脱离监控模块独立运行。

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  1. CONNECT:[ UseTime:0.006080s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001911s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.128690s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.025357s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.002160s ]
  6. SELECT * FROM `set` [ RunTime:0.085727s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.005501s ]
  8. SELECT * FROM `article` WHERE `id` = 517066 LIMIT 1 [ RunTime:0.106003s ]
  9. UPDATE `article` SET `lasttime` = 1785535520 WHERE `id` = 517066 [ RunTime:0.031469s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.049477s ]
  11. SELECT * FROM `article` WHERE `id` < 517066 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.113115s ]
  12. SELECT * FROM `article` WHERE `id` > 517066 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.104623s ]
  13. SELECT * FROM `article` WHERE `id` < 517066 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.106324s ]
  14. SELECT * FROM `article` WHERE `id` < 517066 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.094150s ]
  15. SELECT * FROM `article` WHERE `id` < 517066 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.149239s ]
1.126044s