MPL-B580J-MK72AA

MPL-B580J-MK72AA

具体的例子进行解释说明。在③中，因为通电而在线圈2产生S极，在线圈3产生N极。永磁体的S极在线圈2的对面，永磁体的N极在线圈3的对面，因此会妨碍线圈产生磁极。因此，电流上升是慢的，且电流变得小。

⑥与③相反，因通电而在线圈2产生N极，在线圈3产生S极。由于永磁体的S极在线圈2的对面，永磁体的N极在线圈3的对面，有助于线圈产生磁极。因此，电流的上升是急剧的，且电流变得大。

也就是说，通过确认使电流大或小的通电模式，可以检测出永磁体的位置。

下面使用具体的驱动器电路框图示例和工作波形图来更具体地解释一下。

方法2的电路框图，基本上是在方法1（通过检测同步运行产生的感应电压来启动）的电路框图基础上，加上一个可以生成6种通电模式、检测电源电流并进行比较，从而生成初始驱动模式的电路。在这里省略了一部分，淡蓝色底色的部分是输出A1～A3。

将“（1）位置检测模式生成模块”所生成的6种模式发送到“驱动用基本波形合成模块”，根据A1～A3进行通电。检测到的电源电流通过电流检测电阻和Amp转换为电压，并根据“（2）采样&保持”和“（3）电流值比较及大值模式检测模块”的结果，由“（4）初始驱动模式生成模块”生成基于永磁体位置的初始驱动模式，返回“驱动用基本波形合成模块”，开始驱动。

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