Why do the single phase motor driven appliances experience vibration?

Answer 1

All rotating equipment exhibits vibration to some degree. This is because nothing is ever perfectly balanced, no matter how hard the manufacturer tries to make it so.

In the case of a motor (single- or multi-phased) and a drive train, the motor may be balanced for smooth operation ... but the drive train is not. Or the process may actually have an irregular balance or torque requirement, which shows up as a vibration in the motor.

In general, single phase machines are constructed less ruggedly than multi-phase machines. This means they are, by design, more susceptible to vibration (either intrinsic to the design or induced from the driven equipment).

If you can be more specific about which appliances you mean, I can probably give you a more explicit 'trouble-shooting' guide to vibration.

Answer 2

If you are experiencing bad vibration you have a problem but all motors armatures are balancedwhether they add weight or take it away.But if its the humming you are talking about its called the 60 Hertz humm.Going from170 volt positive ac to 170 volt negative ac.unlike dc in which voltage stays the same.

Answer 3

Poor quality -- something is out of balance or there are bad bearings.