工作状态下的线性马达的电压值高于其overdriver电压

user4586532

Prodigy 20 points

Other Parts Discussed in Thread: DRV2605

您好，我用的贵司的drv2605芯片驱动的线性马达，马达的过载电压值我设置的是1.25vrms,额定电压值设置的是1.2vrms,寄存器写的值是reg[0x16]=2e,reg[0x17]=51,

但是我抓出来的马达工作状态下波形的峰峰值是大于过载电压的，大约为3.69v甚至更高。请问该怎样才能把马达的工作状态的电压给降到额定电压上？

over 9 years ago

0 Peter Li79 over 9 years ago

TI__Expert 8940 points

Hi,

please use a low-pass filter to get the actual drive signal going to the actuator.

please refer to the "Figure 11. test setup" in below link:
www.ti.com/.../drv2605l.pdf

0 user4586532 over 9 years ago in reply to Peter Li79

Prodigy 20 points

您好，我正是在芯片的输出端外接了一个低通滤波器进行测试的，输出波形的峰峰值还是比我设置的过载电压值还要高大约0.1~0.4v。

请问还有什么办法可以设置？

0 Peter Li79 over 9 years ago in reply to user4586532

TI__Expert 8940 points

Hi,

may i know whether you have run the auto-calibration before the test?

here is a device guide for DRV2605: www.ti.com/.../sloa189.pdf

Thanks.

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工作状态下的线性马达的电压值高于其overdriver电压