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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
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导致电机故障和正弦波失真的原因是什么？
无刷电机可能因为霍尔输入端的噪音而无法正常工作。
如图1所示，IC根据霍尔输入端的零交叉产生FG信号。
将FG信号的半周期时间作为60°电角度的时间，并生成下一个60°电角度周期的调制波形。
如果霍尔信号中有噪声，零交叉附近可能会出现抖动现象，这也会导致FG信号抖动。
由于FG信号抖动，IC将输出高频调制波形。
这种快速调制波形将持续至下一次霍尔零交叉，这可能导致电机故障和电流波形失真。请采取相应措施，例如在霍尔输入端增设噪声滤波器以消除噪声。
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