Likely a daft question, but it does no harm to ask....
I have a large centrifugal blower, salvaged from old equipment, which I would like to use. My problem is that I don't know how it should be wired - unfortunately I know next to nothing about electric motors.
The blower is manufactured by "Shenzhen Fengbaisheng Fan Manufacturing Co Ltd" and has the part number "DW8-53No1.5C" - it is rated, according to the plate, for 35W at 220V.
It has three wires, Red, Blue and Yellow. The person who originally salvaged it (who is no longer available to ask) labeled the red wire "L" and the blue wire "N".
If I apply about 200V AC between Red and Blue, the motor will draw about 0.5A and rotate slowly if given a spin to start it. It will run in either direction.
Curiously, the motor draws no significant current between Red and Blue until a potential of about 210V RMS is reached - it then continues to draw current until the voltage drops to around 180V or so.
The connections measure as follows when measured with a DMM/LCR meter:
Yellow-Blue: open (several Megohms and no significant capacitance)
Red-Blue: open (several Megohms and no significant capacitance)
Yellow-Red: About 340 Ohm DC and significantly inductive (1.5H or so)
I suspect there should be a run capacitor wired in here somewhere, but I don't know where. I also wonder if there is something more complicated going on inside this motor, due to the strange behavior when powered up on the Variac.
Just to throw in another unknown, of course we can't rule out the possibility that the blower is faulty as I don't know why the equipment is came from was scrapped!
If anyone can make any suggestions then I'd be grateful...