May I add few words here? I can't type Chinese, so please excuse my Chinglish. Not sure it is correct or not. "Biosfix" and "sharkbait" opinion is correct. I have experence. form the factory where I work for, motor only drawing small electrical current before the out let gate is open
Same situation. If an Intake or Discharge outlet of the vacuum were clogged up. It means no air is movable by the fan blade, there for the fan blade and motor do not have any load, it may only have the friction from bearing and it’s own weight.
For example. If you push car against to a wall. Do you feel that you work hard and will you get tire? you will not get tire, you will only get tired when pushing that car and able to move forward.
Same situation. If an Intake or Discharge outlet of the vacuum were clogged up. It means no air is movable by the fan blade, there for the fan blade and motor do not have any load, it may only have the friction from bearing and it’s own weight.
For example. If you push car against to a wall. Do you feel that you work hard and will you get tire? you will not get tire, you will only get tired when pushing that car and able to move forward.