请问霍尔传感器是如何获取无刷电机的速度的？下面是程序代码。

只看该作者 · 2015-8-18 21:10

请问霍尔传感器是如何获取无刷电机的速度的？下面是程序代码。
hall_change_time_sum+=isr_time_inc;
            hall_change_time_sum-=hall_change_time[hall_change_time_index];
            hall_change_time[hall_change_time_index]=isr_time_inc;
            isr_time_inc=0;
            hall_change_time_index++;
            hall_change_time_index &=0x3;
            hall_change_time_ave=hall_change_time_sum>>2;

            speed_tmp = ((long)200000)/hall_change_time_ave;
            system.now_speed = speed_tmp;

            speed_no_change_inc=0;
      }
      else
      {
            speed_no_change_inc++;
            if(speed_no_change_inc>1000)
                     {
                     speed_no_change_inc=0;
                     system.now_speed=0;
                     }
      }

      if(IsrTicker&0xff==0xff)
            {
            pid1_spd.Ref = system.speed_close_loop;
            pid1_spd.Fdb = system.now_speed*3;
            pid1_spd.calc(&pid1_spd);
            }