Other Parts Discussed in Thread: MSP-EXP430FR2355, MSP430FR2355,
我按照导引中的描述,将硬件按其连接,并在VBAT-PGND之间接入10V电源,随后使用Micro-USB线连接电脑与评估板,GUI图形界面上出现绿灯,左下角显示硬件已连接,串口波特率9600,此时我点击Read All Registers,等待超过三分钟,都没有显示读取寄存器,D6指示灯也没有亮过
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我按照导引中的描述,将硬件按其连接,并在VBAT-PGND之间接入10V电源,随后使用Micro-USB线连接电脑与评估板,GUI图形界面上出现绿灯,左下角显示硬件已连接,串口波特率9600,此时我点击Read All Registers,等待超过三分钟,都没有显示读取寄存器,D6指示灯也没有亮过
1、我订购了几颗新的MCF8316A,它的料号是MCF8316A1V,但评估板上的丝印是PMCF8316A0V,这有影响吗?
2、更换MCF8316之后,可以读写寄存器了,但是 D2红灯亮,读取寄存器为MPET IPD 故障 [MPET_IPD_Fault],我根据调优指南中的指示,首先尝试多次重启,随后逐渐增加 MPET IPD 电流阈值 [MPET_IPD_CURRENT_LIMIT]到最大的2A,都没有解决问题,并且我根据电机手册写入了相电阻0.84Ω,相电感0.312,IPD故障仍然存在
3、更换MCF8316之后,虽然可以通信,但是由于故障无法启动电机,更换回原来的8316A也仍然IPD故障,我想问MCF8316A是否在未写入任何参数的情况下仍然可以驱动电机,只是无法让电机工作在最佳状态,还是说未写入完整参数前无法驱动电机(PS:测量板上电阻阻值正常,电容未短路,MCF8316A低温加焊多次,暂排除虚焊,DVDD 1.5V,AVDD 3.3V,VBK 5V,VBAT与VM都为14.99V)
Ok, FGOUT pin output motor speed (Hz), how do I convert the frequency of this pin into mechanical speed (RPM), my motor pole number is 7, there is no option of 7 pole number in [FG_DIV], I choose 6 pole number, this option indicates the division by 3, then the FGOUT pin frequency is measured at 200Hz, So how do I figure out the RPM?
The equation for converting from electrical frequency in Hz to motor mechanical frequency in RPM is:
The FG_DIV allows you to divide the FG signal by the number of motor pole-pairs, which would give you rotations per second (RPS). To get RPM, you would then multiply the RPS value by 60.
Important to distinguish between motor poles or pole-pairs.
Generally, motors are designed with even numbers of poles, so I think your motor probably has 7 pole-pairs, or 14 poles. In this case, you would choose the "Divide by 7 (14-pole motor mechanical speed)" option for FG_DIV. After this, your FG pin would be outputting the motor speed in RPS.
The MCF8316A doesn't have an option to output FG in RPM, so you will have to monitor the FG frequency and convert RPS to RPM yourself.