Reduction gear has over 16,000 rpm and a reduction ratio over 500 times, which is impossible with a normal decelerator.
On the general reduction gear, it becomes no-load state when motor stops.
And the motor lose stop fuction by external action.
But we have a self-locking fuction which never works if the motor does not rotate. If the power supply is interrupted when the landing gear is operated, it can always maintain its position.