无论是在突加电流还是在去掉电流的过程中，都存在着一个由磁化或去磁过程引起的初始滞后时间。
There was an initial delay time at either switching the step current on or off, which was caused by the magnetizing or de-magnetizing process.
当电源故障已经发生时，用在电源故障情况下的电力去磁记录磁头。
When a power failure has occurred, the recording head is demagnetized with power in case of a power failure.
由于直驱式风力发电机转速较低，定子绕组需要有较多的匝数以输出足够高的电压，因而绕组负载电流的去磁反应较大；
More turns of winding is needed to produce enough voltage because the DPMG rotates at low speed, but the armature reaction is high at same time.
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