shaded-pole motor (Ac single phase) speed reduction

Status
Not open for further replies.
F

fences

Junior Member level 3
Joined
Feb 7, 2011
Messages
25
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,453
Hello,
I use a diode to reduce the speed of the AC "shaded-pole motor". but there are some issues:
"noise" and "vibration" of the motor has been increased. ( there is hum voice )
is this vibration and noise damage the motor?
thanks.
 

Hi

We don't know how you used the diode. Nor do we know the type of motor or voltages or currents.

A simple hand drawn schematic should show all this.

Klaus
 

KlausST said:
Hi

We don't know how you used the diode. Nor do we know the type of motor or voltages or currents.

A simple hand drawn schematic should show all this.

Klaus
Click to expand...


Thanks. this is my schematic:
 

Hi,

Please give a link to the datasheet of "Universal diode". ;-)

Generally it is no good idea to run an inductive device (motor, valve, transformer...) that is designed for pure AC on DC (or AC + DC). Otherwise the magnets (inductor core) gets saturated and causes high current, and high dissipated power (heat).

A better solution could be to use two anti series connected Zeners to reduce both half waves symmetrically. Mind the dissipated heat. For sure a resistor in series could work, too, but with less motor torque...

Often used: Triac phase control. (Dimmer).

Klaus
 
Reactions: fences

    F

    fences

    Points: 2
    Helpful Answer Positive Rating

I meant that any type of 4000 series like 1n40002
thanks a lot for the reply.
 

ZASto said:
Your image shows universal motor, not shaded pole motor.
Shaded pole motors do not have brushes
Click to expand...
No brushes in the photo! It looks very much like a standard shaded pole induction motor.
 
Reactions: fences

    F

    fences

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…