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DRV8434A: The DRV8434A stall detection function is not output

Part Number: DRV8434A

When using DRV8434A, is there an output of STL_TH in torque counting mode, but I do not observe the output, STL_TH level will be pulled down after starting the motor? At the same time, it is confirmed that STL_REP is pulled down, what is the reason?

  • 您好

    使用DRV8434A时,‌在扭矩计数模式下,‌STL_TH确实应该有输出。‌如果您在电机启动后没有观察到STL_TH的输出,‌并且STL_TH的电平被拉低,‌这通常是由于失速检测功能被触发所导致的。‌同时,‌STL_REP被拉低也进一步证实了电机可能处于失速状态。‌

    在扭矩计数模式下,‌DRV8434A会监测电机的扭矩情况,‌并在检测到电机失速时通过STL_TH和STL_REP引脚输出相应的信号。‌STL_TH在失速时会被拉低,‌以指示电机已经失速。‌而STL_REP同样也会因失速而被拉低,‌作为失速检测的一个补充信号。‌

    为了解决这个问题,‌您可以尝试以下几个步骤:‌

    1. 检查电机负载‌:‌确保电机的负载在合理范围内,‌避免过重的负载导致电机失速。‌
    2. 检查驱动电路‌:‌仔细检查DRV8434A的驱动电路,‌包括电源供电、‌控制信号等,‌确保它们都正常工作。‌
    3. 调整失速阈值‌:‌如果可能的话,‌您可以尝试调整DRV8434A的失速阈值设置,‌以更准确地检测电机的失速情况。‌