Carlos said:
Hi
What is a 220VAC synchronous motor?
Is it a normal AC (2 or 3 wire) motor?
Thanks
Carlos
Most AC motors are induction motors. That means that there is an eddy
current magnetic memory of sorts built into the rotor that holds some
of the field magnetism and gives the field something to work against.
This magnetic memory is constantly being refreshed as the motor turns,
but this process slips the memorized field slowly, causing the
induction motor to run a little slower than in synchronism with the
AC, with the slip increasing as the load torque increases.
Synchronous motors give the field a fixed magnetic structure to work
against. Either a chunk of iron with (salient) poles and spaces
between poles (synchronous reluctance) or permanent magnets. These
turn in strict synchronism with the line frequency, with only a phase
shift as load torque varies.
