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你好,
使用L6472时,我听到电机在听到时会发出声音(高音)噪音。 噪声量随着保持电流的增加而增加。电机是否装载无关紧要。 当我查看带有示波器的绕组时,典型的pwm信号锁定和占空比适合保持设定值 另一对绕组看起来“解锁”,频率比其他绕组高得多。 EVAL Bd硬件 24v电源,电流设定点.35amp Nema17,18mh / 8.9ohms,0.9度步进角 有一个我忽略的环境 L6470不会发生这种情况。 感谢您的支持 ! 以上来自于谷歌翻译 以下为原文 Hello, With L6472 I hear audible (high pitch) noise from motor when holding. volume of noise increase with increase hold current. It does not matter if the motor is loaded or not. When I look at winding with scope one pair is the typical pwm signal locked and duty cycle appropriate for the hold setpoint The other pair of windings appear ‘unlocked’ and much higher in frequency than the other winding. EVAL Bd hardware 24v supply, current set point .35amp Nema17, 18mh / 8.9ohms, 0.9degree step angle Is there a setting I am overlooking This does not occur with L6470. thanks for your support ! |
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你好,
电流控制性能取决于参数的配置(关闭时间,快速衰减持续时间等)。 不应将IC的默认配置视为可获得最佳结果的配置。 您可以尝试以下配置: 最短准时= 3我们 最短OFF时间= 21 us tOFFfast = 10我们 tSTEP = 12我们 tsw = 44我们 有关当前控制算法的更多详细信息,请访问http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00063976.pdf 亲切的问候 恩里科 以上来自于谷歌翻译 以下为原文 Hello, The current control performance depends on the configuration of the parameters (off time, fast decay duration, etc). The default configuration of the IC should not be considered the one which gives best results. You could try the following configuration: Minimum on time = 3 us Minimum OFF time = 21 us tOFFfast = 10 us tSTEP = 12 us tsw = 44 us More details about the curren tcontrol algorithm are available in http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00063976.pdf Kind Regards Enrico |
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亲爱的恩里科,
我和其他客户有同样的问题;我发现这个问题有两个不同的sanyo denki步进电机系列(你可以在附件中找到数据表):103H7126-0140型和103H7123-0140型;我试过了 您建议的配置,但噪音仍然存在; 我尝试了文件UM1688第39/43页中建议的配置,噪音仍然存在;为了测试,我正在使用L6472的评估板; 我录制了一段视频,说明我说的问题;您可以通过以下链接找到该视频: http://www.onetimebox.org/box/ugkLeeD3H2kgrrveg 你有什么建议可以帮助解决这个问题吗? 最好的祝福 以上来自于谷歌翻译 以下为原文 Dear Enrico, I have the same problem of the other customer; I find this problem with two different family of sanyo denki's stepper motor (you can find the datasheet in the attachment): Type 103H7126-0140 and Type 103H7123-0140; I tried your suggested configuration but the noise still remain; I have tryed the configuration suggested in document UM1688 pag.39/43 and the noise still remain; for testing, I'm using the evaluation board of the L6472; I have recorded a video that show the problem I speak; you can find the video at the following link: http://www.onetimebox.org/box/ugkLeeD3H2kgrrveg Do you have some suggestion that can help to solve this problem? Best regards |
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